bump version

This reverts commit c3426871d2.

.gitignore

@@ -8,10 +8,35 @@
 .\#*
 
 # srnd config files
-*.ini
+srnd.ini
+feeds.ini
 
 # default article store directory
 articles
 
 # generated files
-webroot
+webroot
+
+# built binaries
+go
+gopherjs_go
+./srndv2
+
+# private key
+*.key
+
+# certificates
+certs
+
+
+rebuild.sh
+.gx
+
+# generated js
+contrib/static/nntpchan.js
+contrib/static/js/nntpchan.js
+contrib/static/miner-js.js
+
+
+#docs trash
+doc/.trash

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 Jeff Becker
+Copyright (c) 2015-2018 Jeff Becker
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -0,0 +1,111 @@
+REPO=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
+REPO_GOPATH=$(REPO)/go
+MINIFY=$(REPO_GOPATH)/bin/minify
+STATIC_DIR=$(REPO)/contrib/static
+JS=$(STATIC_DIR)/nntpchan.js
+MINER_JS=$(STATIC_DIR)/miner-js.js
+CONTRIB_JS=$(REPO)/contrib/js/contrib
+LOCAL_JS=$(REPO)/contrib/js/nntpchan
+VENDOR_JS=$(REPO)/contrib/js/vendor
+SRND_DIR=$(REPO)/contrib/backends/srndv2
+NNTPCHAND_DIR=$(REPO)/contrib/backends/nntpchand
+NNTPCHAN_DAEMON_DIR=$(REPO)/contrib/backends/nntpchan-daemon
+SRND=$(REPO)/srndv2
+NNTPCHAND=$(REPO)/nntpchand
+NNTPD=$(REPO)/nntpd
+
+GOROOT=$(shell go env GOROOT)
+GO=$(GOROOT)/bin/go
+
+GOPHERJS_GOROOT ?= $(GOROOT)
+GOPHERJS_GO = $(GOPHERJS_GOROOT)/bin/go
+
+GOPHERJS_GOPATH=$(REPO)/gopherjs_go
+GOPHERJS=$(GOPHERJS_GOPATH)/bin/gopherjs
+
+all: clean build
+
+build: js srnd
+
+full: clean full-build
+
+full-build: srnd beta native
+
+js: $(JS) 
+
+srnd: $(SRND)
+
+$(MINIFY):
+	GOPATH=$(REPO_GOPATH) $(GO) get -v github.com/tdewolff/minify/cmd/minify
+
+$(GOPHERJS):
+	GOROOT=$(GOPHERJS_GOROOT) GOPATH=$(GOPHERJS_GOPATH) $(GOPHERJS_GO) get -v github.com/gopherjs/gopherjs
+
+js-deps: $(MINIFY)
+
+$(MINER_JS): $(GOPHERJS) $(MINIFY)
+	rm -rf $(GOPHERJS_GOPATH)/pkg/
+	cp -rf $(SRND_DIR)/src/github.com $(GOPHERJS_GOPATH)/src/
+	GOROOT=$(GOPHERJS_GOROOT) GOPATH=$(GOPHERJS_GOPATH) $(GOPHERJS) -m -v build github.com/ZiRo-/cuckgo/miner_js -o miner.js
+	$(MINIFY) --mime=text/javascript > $(STATIC_DIR)/miner-js.js < miner.js
+	rm -f miner.js.map miner.js
+
+$(JS): js-deps
+	rm -f $(JS)
+	for f in $(CONTRIB_JS)/*.js ; do $(MINIFY) --mime=text/javascript >> $(JS) < $$f ; done
+	$(MINIFY) --mime=text/javascript >> $(JS) < $(REPO)/contrib/js/entry.js
+	for f in $(LOCAL_JS)/*.js ; do $(MINIFY) --mime=text/javascript >> $(JS) < $$f ; done
+	for f in $(VENDOR_JS)/*.js ; do $(MINIFY) --mime=text/javascript >> $(JS) < $$f ; done
+
+
+$(SRND):
+	GOROOT=$(GOROOT) $(MAKE) -C $(SRND_DIR)
+	cp $(SRND_DIR)/srndv2 $(SRND)
+
+beta: $(NNTPCHAND)
+
+$(NNTPCHAND):
+	GOROOT=$(GOROOT) $(MAKE) -C $(NNTPCHAND_DIR)
+	cp $(NNTPCHAND_DIR)/nntpchand $(NNTPCHAND)
+
+native: $(NNTPD)
+
+$(NNTPD):
+	$(MAKE) -C $(NNTPCHAN_DAEMON_DIR)
+	cp $(NNTPCHAN_DAEMON_DIR)/nntpd $(NNTPD)
+
+test: test-srnd
+
+test-full: test-srnd test-beta test-native
+
+test-srnd:
+	GOROOT=$(GOROOT) $(MAKE) -C $(SRND_DIR) test
+
+test-beta:
+	GOROOT=$(GOROOT) $(MAKE) -C $(NNTPCHAND_DIR) test
+
+test-native:
+	GOROOT=$(GOROOT) $(MAKE) -C $(NNTPCHAN_DAEMON_DIR) test
+
+
+clean: clean-srnd clean-js
+
+clean-full: clean clean-beta clean-native clean-js
+
+clean-srnd:
+	rm -f $(SRND)
+	GOROOT=$(GOROOT) $(MAKE) -C $(SRND_DIR) clean
+
+clean-js:
+	rm -f $(JS) $(MINER_JS)
+
+clean-beta:
+	rm -f $(NNTPCHAND)
+	GOROOT=$(GOROOT) $(MAKE) -C $(NNTPCHAND_DIR) clean
+
+clean-native:
+	rm -f $(NNTPD)
+	$(MAKE) -C $(NNTPCHAN_DAEMON_DIR) clean
+
+distclean: clean
+	rm -rf $(REPO_GOPATH)

README.md

@@ -1,33 +1,68 @@
-# NNTPChan #
 
-NNTPChan (previously known as overchan) is a decentralized imageboard that uses nntp to synchronize content between many different servers. It utilizes cryptographically signed posts to perform optional/opt-in decentralized moderation.
+![le ebin logo](nntpchan.png "ebin logo")
 
-This repository contains resources used by the core daemon which is located [here](https://github.com/majestrate/srndv2) along with general documentation, [here](doc/)
-
-## getting started ##
-
-Get the dependancies
-
-    sudo apt-get update
-    sudo apt-get --no-install-recommends install imagemagick libsodium-dev ffmpegthumbnailer sox build-essential git golang ca-certificates
-
-Check out this repo and build it
-
-    git clone https://github.com/majestrate/nntpchan
-    cd nntpchan
-    ./build.sh
-
-Now configure the database. [Next](doc/database.md)
+![MIT License](https://img.shields.io/github/license/majestrate/nntpchan.svg)
+![Logo is ebin](https://img.shields.io/badge/logo-ebin-brightgreen.svg)
 
 
----
+**NNTPChan** (previously known as overchan) is a decentralized imageboard that uses the [NNTP protocol](https://en.wikipedia.org/wiki/Network_News_Transfer_Protocol) (network-news transfer protocol) to synchronize content between many different servers. It utilizes cryptographically signed posts to perform optional/opt-in decentralized moderation.
 
-*PLEASE* report any bugs you find while setting up or building [(here)](https://github.com/majestrate/nntpchan/issues) so that the problems get fixed :^)
+## Getting started
 
-For peering requests, questions or support find me on [rizon](https://qchat.rizon.net/?channels=#nntpchan) as \__uguu\__
+[This](doc) is a step-by-step guide for getting up-and-running with NNTPChan as well as documentation for developers who want to either work on NNTPChan directly or use NNTPChan in their aplications with the API.
+
+TL;DR edition:
 
 
-Like this project? Fund it:
+    $ sudo apt update
+    $ sudo apt install --no-install-recommends install imagemagick ffmpeg sox build-essential git ca-certificates postgresql postgresql-client
+    $ git clone https://github.com/majestrate/nntpchan
+    $ cd nntpchan
+    $ make
+    $ SRND_INSTALLER=0 ./srndv2 setup 
 
-bitcoin: 15yuMzuueV8y5vPQQ39ZqQVz5Ey98DNrjE
+## Bugs and issues
 
+*PLEASE* report any bugs you find while building, setting-up or using NNTPChan on the [GitHub issue tracker](https://github.com/majestrate/nntpchan/issues), the [issue tracker on tor](http://git.psii2pdloxelodts.onion/psi/nntpchan/), the [issue tracker on i2p](http://git.psi.i2p/psi/nntpchan/) or on the [GitGud issue tracker](https://gitgud.io/jeff/nntpchan/issues) so that the probelms can be resolved or discussed.
+
+## Clients
+
+NNTP (confirmed working):
+
+* Thunderbird
+
+Web:
+
+* [Yukko](https://github.com/faissaloo/Yukko): ncurses based nntpchan web ui reader
+
+
+## Support
+
+Need help? Join us on IRC.
+
+1. [freenode: #nntpchan](https://webchat.freenode.net/?channels=#nntpchan)
+2. [rizon: #nntpchan](https://qchat.rizon.net/?channels=#nntpchan) - Most active
+
+## History
+
+* started in mid 2013 on anonet
+
+This is a graph of the post flow of the `overchan.test` newsgroup over 4 years, quite a big network.
+
+(thnx anon who made this btw)
+
+![network topology of 4 years](topology.png "changolia")
+
+[source code for map generation](https://github.com/nilesr/nntpchan-mapper)
+
+## Donations
+
+Like this project? Why not help by funding it? This address pays for the server that runs `2hu-ch.org`
+
+Bitcoin: 15yuMzuueV8y5vPQQ39ZqQVz5Ey98DNrjE
+
+Monero: 46thSVXSPNhJkCgUsFD9WuCjW4K41DAHGL9khni2VEqmZZhfEZVvcukCp357rfhngZdviZMaeNdj5CLqhLyeK2qZRBCyL7Q
+
+## Acknowledgements
+
+* [Deavmi](https://deavmi.carteronline.net/) - Making the documentation beautiful.

TODO.md

@@ -1,6 +1,10 @@
 ## TODO ##
 
+* imrpove frontend templates
 * extra stylesheets
-* alternative templates
-* javascript free mod panel
-* liveui
+* better mod panel
+* easier peering
+* improve command line mod tools
+* refactor srnd package
+* configurable thumbnail size [issue #40](https://github.com/majestrate/nntpchan/issues/40)
+* postgres password bug [issue #137](https://github.com/majestrate/nntpchan/issues/137)

build.sh

@@ -1,8 +0,0 @@
-#!/usr/bin/env bash
-set -e
-root=$(readlink -e $(dirname $0))
-cd $root
-export GOPATH=$root/go
-mkdir -p $GOPATH
-go get -u github.com/majestrate/srndv2
-cp -a $GOPATH/bin/srndv2 $root

contrib/backends/nntpchan-daemon/.clang-format

@@ -0,0 +1,14 @@
+TabWidth: 2
+UseTab: Never
+ColumnLimit: 120
+IndentWidth: 2
+Language: Cpp
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterClass: true
+  AfterControlStatement: true
+  AfterEnum: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterStruct: true
+  BeforeElse: true

contrib/backends/nntpchan-daemon/.gitignore

@@ -0,0 +1,6 @@
+*.o
+*.a
+nntpd
+tools/authtool
+tools/testtool
+.gdb_history

contrib/backends/nntpchan-daemon/Makefile

@@ -0,0 +1,75 @@
+
+REPO=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
+NNTPCHAN_PATH = $(REPO)/libnntpchan
+
+NNTPCHAN_SRC := $(wildcard $(NNTPCHAN_PATH)/*.cpp)
+NNTPCHAN_HDR := $(wildcard $(NNTPCHAN_PATH)/*.hpp)
+NNTPCHAN_OBJ := $(NNTPCHAN_SRC:.cpp=.o)
+
+MUSTACHE_PATH = $(REPO)/libmustache
+
+MUSTACHE_SRC := $(wildcard $(MUSTACHE_PATH)/*.cpp)
+MUSTACHE_SRC += $(wildcard $(MUSTACHE_PATH)/*/*.cpp)
+MUSTACHE_HDR := $(wildcard $(MUSTACHE_PATH)/*.hpp)
+MUSTACHE_OBJ := $(MUSTACHE_SRC:.cpp=.o)
+
+HEADERS_PATH=$(REPO)/include
+
+TOOL_PATH := $(REPO)/tools
+
+TOOL_SRC := $(wildcard $(TOOL_PATH)/*.cpp)
+TOOLS := $(TOOL_SRC:.cpp=)
+
+OBJ := $(NNTPCHAN_OBJ)
+OBJ += $(MUSTACHE_OBJ)
+
+TEST = $(REPO)/test
+
+DAEMON_SRC = $(REPO)/daemon
+
+PKGS := libuv libsodium
+
+LD_FLAGS := $(shell pkg-config --libs $(PKGS)) -lstdc++fs
+INC_FLAGS := $(shell pkg-config --cflags $(PKGS)) -I$(HEADERS_PATH)
+REQUIRED_CXXFLAGS = -std=c++17 -Wall -Wextra -Werror -pedantic $(INC_FLAGS)
+
+DEBUG = 1
+
+ifeq ($(DEBUG),1)
+	REQUIRED_CXXFLAGS += -g
+endif
+
+CXXFLAGS += $(REQUIRED_CXXFLAGS)
+
+NNTPCHAN_LIB = $(REPO)/libnntpchan.a
+MUSTACHE_LIB = $(REPO)/libmustache.a
+
+LIBS = $(NNTPCHAN_LIB) $(MUSTACHE_LIB)
+
+EXE = $(REPO)/nntpd
+
+
+all: build
+
+build: $(EXE) $(TOOLS)
+
+$(MUSTACHE_LIB): $(MUSTACHE_OBJ)
+	$(AR) -r $(MUSTACHE_LIB) $(MUSTACHE_OBJ)
+
+$(NNTPCHAN_LIB): $(NNTPCHAN_OBJ)
+	$(AR) -r $(NNTPCHAN_LIB) $(NNTPCHAN_OBJ)
+
+$(EXE): $(LIBS)
+	$(CXX) $(CXXFLAGS) $(DAEMON_SRC)/main.cpp $(LIBS) $(LD_FLAGS) -o $(EXE)
+
+$(TOOLS): $(TOOL_SRC) $(LIBS)
+	$(CXX) $(CXXFLAGS) $< $(LIBS) $(LD_FLAGS) -o $@
+
+build-test: $(LIBS)
+	$(CXX) -o $(TEST) $(CXXFLAGS) test.cpp $(LIBS) $(LD_FLAGS)
+
+test: build-test
+	$(TEST)
+
+clean:
+	$(RM) $(OBJ) $(LIBS) $(EXE) $(TOOLS) $(TEST)

contrib/backends/nntpchan-daemon/README.md

@@ -0,0 +1,21 @@
+# nntpchan-daemon
+
+C++ rewrite
+
+requirements:
+
+* g++ 7.2.0 >= or clang 5.x >=
+
+* pkg-config
+
+* libsodium 1.x
+
+* libuv 1.x
+
+* boost variant (for now)
+
+* GNU Make
+
+building:
+
+    $ make

contrib/backends/nntpchan-daemon/contrib/nntpchan.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+exit 0

contrib/backends/nntpchan-daemon/daemon/ini.hpp

@@ -0,0 +1,197 @@
+/**
+ * The MIT License (MIT)
+ * Copyright (c) <2015> <carriez.md@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+  *
+  */
+
+#ifndef INI_HPP
+#define INI_HPP
+
+#include <cassert>
+#include <cstring>
+#include <fstream>
+#include <iostream>
+#include <list>
+#include <map>
+#include <stdexcept>
+#include <string>
+
+namespace INI
+{
+
+struct Level
+{
+  Level() : parent(NULL), depth(0) {}
+  Level(Level *p) : parent(p), depth(0) {}
+
+  typedef std::map<std::string, std::string> value_map_t;
+  typedef std::map<std::string, Level> section_map_t;
+  typedef std::list<value_map_t::const_iterator> values_t;
+  typedef std::list<section_map_t::const_iterator> sections_t;
+  value_map_t values;
+  section_map_t sections;
+  values_t ordered_values; // original order in the ini file
+  sections_t ordered_sections;
+  Level *parent;
+  size_t depth;
+
+  const std::string &operator[](const std::string &name) { return values[name]; }
+  Level &operator()(const std::string &name) { return sections[name]; }
+};
+
+class Parser
+{
+public:
+  Parser(const char *fn);
+  Parser(std::istream &f) : f_(&f), ln_(0) { parse(top_); }
+  Level &top() { return top_; }
+  void dump(std::ostream &s) { dump(s, top(), ""); }
+
+private:
+  void dump(std::ostream &s, const Level &l, const std::string &sname);
+  void parse(Level &l);
+  void parseSLine(std::string &sname, size_t &depth);
+  void err(const char *s);
+
+private:
+  Level top_;
+  std::ifstream f0_;
+  std::istream *f_;
+  std::string line_;
+  size_t ln_;
+};
+
+inline void Parser::err(const char *s)
+{
+  char buf[256];
+  sprintf(buf, "%s on line #%ld", s, ln_);
+  throw std::runtime_error(buf);
+}
+
+inline std::string trim(const std::string &s)
+{
+  char p[] = " \t\r\n";
+  long sp = 0;
+  long ep = s.length() - 1;
+  for (; sp <= ep; ++sp)
+    if (!strchr(p, s[sp]))
+      break;
+  for (; ep >= 0; --ep)
+    if (!strchr(p, s[ep]))
+      break;
+  return s.substr(sp, ep - sp + 1);
+}
+
+inline Parser::Parser(const char *fn) : f0_(fn), f_(&f0_), ln_(0)
+{
+  if (!f0_)
+    throw std::runtime_error(std::string("failed to open file: ") + fn);
+
+  parse(top_);
+}
+
+inline void Parser::parseSLine(std::string &sname, size_t &depth)
+{
+  depth = 0;
+  for (; depth < line_.length(); ++depth)
+    if (line_[depth] != '[')
+      break;
+
+  sname = line_.substr(depth, line_.length() - 2 * depth);
+}
+
+inline void Parser::parse(Level &l)
+{
+  while (std::getline(*f_, line_))
+  {
+    ++ln_;
+    if (line_[0] == '#' || line_[0] == ';')
+      continue;
+    line_ = trim(line_);
+    if (line_.empty())
+      continue;
+    if (line_[0] == '[')
+    {
+      size_t depth;
+      std::string sname;
+      parseSLine(sname, depth);
+      Level *lp = NULL;
+      Level *parent = &l;
+      if (depth > l.depth + 1)
+        err("section with wrong depth");
+      if (l.depth == depth - 1)
+        lp = &l.sections[sname];
+      else
+      {
+        lp = l.parent;
+        size_t n = l.depth - depth;
+        for (size_t i = 0; i < n; ++i)
+          lp = lp->parent;
+        parent = lp;
+        lp = &lp->sections[sname];
+      }
+      if (lp->depth != 0)
+        err("duplicate section name on the same level");
+      if (!lp->parent)
+      {
+        lp->depth = depth;
+        lp->parent = parent;
+      }
+      parent->ordered_sections.push_back(parent->sections.find(sname));
+      parse(*lp);
+    }
+    else
+    {
+      size_t n = line_.find('=');
+      if (n == std::string::npos)
+        err("no '=' found");
+      std::pair<Level::value_map_t::const_iterator, bool> res =
+          l.values.insert(std::make_pair(trim(line_.substr(0, n)), trim(line_.substr(n + 1, line_.length() - n - 1))));
+      if (!res.second)
+        err("duplicated key found");
+      l.ordered_values.push_back(res.first);
+    }
+  }
+}
+
+inline void Parser::dump(std::ostream &s, const Level &l, const std::string &sname)
+{
+  if (!sname.empty())
+    s << '\n';
+  for (size_t i = 0; i < l.depth; ++i)
+    s << '[';
+  if (!sname.empty())
+    s << sname;
+  for (size_t i = 0; i < l.depth; ++i)
+    s << ']';
+  if (!sname.empty())
+    s << std::endl;
+  for (Level::values_t::const_iterator it = l.ordered_values.begin(); it != l.ordered_values.end(); ++it)
+    s << (*it)->first << '=' << (*it)->second << std::endl;
+  for (Level::sections_t::const_iterator it = l.ordered_sections.begin(); it != l.ordered_sections.end(); ++it)
+  {
+    assert((*it)->second.depth == l.depth + 1);
+    dump(s, (*it)->second, (*it)->first);
+  }
+}
+}
+
+#endif // INI_HPP

contrib/backends/nntpchan-daemon/daemon/main.cpp

@@ -0,0 +1,146 @@
+#include "ini.hpp"
+
+#include <nntpchan/crypto.hpp>
+#include <nntpchan/event.hpp>
+#include <nntpchan/exec_frontend.hpp>
+#include <nntpchan/nntp_server.hpp>
+#include <nntpchan/staticfile_frontend.hpp>
+#include <nntpchan/storage.hpp>
+
+#include <string>
+#include <vector>
+
+int main(int argc, char *argv[])
+{
+  if (argc != 2)
+  {
+    std::cerr << "usage: " << argv[0] << " config.ini" << std::endl;
+    return 1;
+  }
+
+  nntpchan::Crypto crypto;
+
+  nntpchan::Mainloop loop;
+
+  nntpchan::NNTPServer nntp(loop);
+
+  std::string fname(argv[1]);
+
+  std::ifstream i(fname);
+
+  if (i.is_open())
+  {
+    INI::Parser conf(i);
+
+    std::vector<std::string> requiredSections = {"nntp", "articles"};
+
+    auto &level = conf.top();
+
+    for (const auto &section : requiredSections)
+    {
+      if (level.sections.find(section) == level.sections.end())
+      {
+        std::cerr << "config file " << fname << " does not have required section: ";
+        std::cerr << section << std::endl;
+        return 1;
+      }
+    }
+
+    auto &storeconf = level.sections["articles"].values;
+
+    if (storeconf.find("store_path") == storeconf.end())
+    {
+      std::cerr << "storage section does not have 'store_path' value" << std::endl;
+      return 1;
+    }
+
+    nntp.SetStoragePath(storeconf["store_path"]);
+
+    auto &nntpconf = level.sections["nntp"].values;
+
+    if (nntpconf.find("bind") == nntpconf.end())
+    {
+      std::cerr << "nntp section does not have 'bind' value" << std::endl;
+      return 1;
+    }
+
+    if (nntpconf.find("instance_name") == nntpconf.end())
+    {
+      std::cerr << "nntp section lacks 'instance_name' value" << std::endl;
+      return 1;
+    }
+
+    nntp.SetInstanceName(nntpconf["instance_name"]);
+
+    if (nntpconf.find("authdb") != nntpconf.end())
+    {
+      nntp.SetLoginDB(nntpconf["authdb"]);
+    }
+
+    if (level.sections.find("frontend") != level.sections.end())
+    {
+      // frontend enabled
+      auto &frontconf = level.sections["frontend"].values;
+      if (frontconf.find("type") == frontconf.end())
+      {
+        std::cerr << "frontend section provided but 'type' value not provided" << std::endl;
+        return 1;
+      }
+      auto ftype = frontconf["type"];
+      if (ftype == "exec")
+      {
+        if (frontconf.find("exec") == frontconf.end())
+        {
+          std::cerr << "exec frontend specified but no 'exec' value provided" << std::endl;
+          return 1;
+        }
+        nntp.SetFrontend(new nntpchan::ExecFrontend(frontconf["exec"]));
+      }
+      else if (ftype == "staticfile")
+      {
+        auto required = {"template_dir", "out_dir", "template_dialect", "max_pages"};
+        for (const auto &opt : required)
+        {
+          if (frontconf.find(opt) == frontconf.end())
+          {
+            std::cerr << "staticfile frontend specified but no '" << opt << "' value provided" << std::endl;
+            return 1;
+          }
+        }
+        auto maxPages = std::stoi(frontconf["max_pages"]);
+        if (maxPages <= 0)
+        {
+          std::cerr << "max_pages invalid value '" << frontconf["max_pages"] << "'" << std::endl;
+          return 1;
+        }
+        nntp.SetFrontend(new nntpchan::StaticFileFrontend(nntpchan::CreateTemplateEngine(frontconf["template_dialect"]),
+                                                          frontconf["template_dir"], frontconf["out_dir"], maxPages));
+      }
+      else
+      {
+        std::cerr << "unknown frontend type '" << ftype << "'" << std::endl;
+        return 1;
+      }
+    }
+
+    auto &a = nntpconf["bind"];
+
+    try
+    {
+      nntp.Bind(a);
+    } catch (std::exception &ex)
+    {
+      std::cerr << "failed to bind: " << ex.what() << std::endl;
+      return 1;
+    }
+
+    std::cerr << "nntpd for " << nntp.InstanceName() << " bound to " << a << std::endl;
+
+    loop.Run();
+  }
+  else
+  {
+    std::cerr << "failed to open " << fname << std::endl;
+    return 1;
+  }
+}

contrib/backends/nntpchan-daemon/include/mstch/mstch.hpp

@@ -0,0 +1,113 @@
+#pragma once
+
+#include <vector>
+#include <map>
+#include <string>
+#include <memory>
+#include <functional>
+
+#include <boost/variant.hpp>
+
+namespace mstch {
+
+struct config {
+  static std::function<std::string(const std::string&)> escape;
+};
+
+namespace internal {
+
+template<class N>
+class object_t {
+ public:
+  const N& at(const std::string& name) const {
+    cache[name] = (methods.at(name))();
+    return cache[name];
+  }
+
+  bool has(const std::string name) const {
+    return methods.count(name) != 0;
+  }
+
+ protected:
+  template<class S>
+  void register_methods(S* s, std::map<std::string,N(S::*)()> methods) {
+    for(auto& item: methods)
+      this->methods.insert({item.first, std::bind(item.second, s)});
+  }
+
+ private:
+  std::map<std::string, std::function<N()>> methods;
+  mutable std::map<std::string, N> cache;
+};
+
+template<class T, class N>
+class is_fun {
+ private:
+  using not_fun = char;
+  using fun_without_args = char[2];
+  using fun_with_args = char[3];
+  template <typename U, U> struct really_has;
+  template <typename C> static fun_without_args& test(
+      really_has<N(C::*)() const, &C::operator()>*);
+  template <typename C> static fun_with_args& test(
+      really_has<N(C::*)(const std::string&) const,
+      &C::operator()>*);
+  template <typename> static not_fun& test(...);
+
+ public:
+  static bool const no_args = sizeof(test<T>(0)) == sizeof(fun_without_args);
+  static bool const has_args = sizeof(test<T>(0)) == sizeof(fun_with_args);
+};
+
+template<class N>
+using node_renderer = std::function<std::string(const N& n)>;
+
+template<class N>
+class lambda_t {
+ public:
+  template<class F>
+  lambda_t(F f, typename std::enable_if<is_fun<F, N>::no_args>::type* = 0):
+      fun([f](node_renderer<N> renderer, const std::string&) {
+        return renderer(f());
+      })
+  {
+  }
+
+  template<class F>
+  lambda_t(F f, typename std::enable_if<is_fun<F, N>::has_args>::type* = 0):
+      fun([f](node_renderer<N> renderer, const std::string& text) {
+        return renderer(f(text));
+      })
+  {
+  }
+
+  std::string operator()(node_renderer<N> renderer,
+      const std::string& text = "") const
+  {
+    return fun(renderer, text);
+  }
+
+ private:
+  std::function<std::string(node_renderer<N> renderer, const std::string&)> fun;
+};
+
+}
+
+using node = boost::make_recursive_variant<
+    std::nullptr_t, std::string, int, double, bool,
+    internal::lambda_t<boost::recursive_variant_>,
+    std::shared_ptr<internal::object_t<boost::recursive_variant_>>,
+    std::map<const std::string, boost::recursive_variant_>,
+    std::vector<boost::recursive_variant_>>::type;
+using object = internal::object_t<node>;
+using lambda = internal::lambda_t<node>;
+using map = std::map<const std::string, node>;
+using array = std::vector<node>;
+
+std::string render(
+    const std::string& tmplt,
+    const node& root,
+    const std::map<std::string,std::string>& partials =
+        std::map<std::string,std::string>());
+
+}

contrib/backends/nntpchan-daemon/include/nntpchan/base64.hpp

@@ -0,0 +1,22 @@
+#ifndef NNTPCHAN_BASE64_HPP
+#define NNTPCHAN_BASE64_HPP
+#include <string>
+#include <vector>
+
+namespace nntpchan
+{
+/** returns base64 encoded string */
+std::string B64Encode(const uint8_t *data, const std::size_t l);
+
+/** @brief returns true if decode was successful */
+bool B64Decode(const std::string &data, std::vector<uint8_t> &out);
+
+/** returns base32 encoded string */
+std::string B32Encode(const uint8_t *data, const std::size_t l);
+
+/** @brief returns true if decode was successful */
+bool B32Decode(const std::string &data, std::vector<uint8_t> &out);
+
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/buffer.hpp

@@ -0,0 +1,19 @@
+#ifndef NNTPCHAN_BUFFER_HPP
+#define NNTPCHAN_BUFFER_HPP
+#include <string>
+#include <uv.h>
+
+namespace nntpchan
+{
+struct WriteBuffer
+{
+  uv_write_t w;
+  uv_buf_t b;
+
+  WriteBuffer(const std::string &s);
+  WriteBuffer(const char *b, const size_t s);
+  ~WriteBuffer();
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/crypto.hpp

@@ -0,0 +1,28 @@
+#ifndef NNTPCHAN_CRYPTO_HPP
+#define NNTPCHAN_CRYPTO_HPP
+
+#include <array>
+#include <sodium/crypto_hash.h>
+#include <sodium/crypto_generichash.h>
+
+namespace nntpchan
+{
+typedef std::array<uint8_t, crypto_hash_BYTES> SHA512Digest;
+
+void SHA512(const uint8_t *d, std::size_t l, SHA512Digest &h);
+
+  typedef std::array<uint8_t, crypto_generichash_BYTES> Blake2BDigest;
+  void Blake2B(const uint8_t *d, std::size_t l, Blake2BDigest & h);
+
+  std::string Blake2B_base32(const std::string & str);
+
+  
+/** global crypto initializer */
+struct Crypto
+{
+  Crypto();
+  ~Crypto();
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/event.hpp

@@ -0,0 +1,23 @@
+#ifndef NNTPCHAN_EVENT_HPP
+#define NNTPCHAN_EVENT_HPP
+#include <uv.h>
+
+namespace nntpchan
+{
+class Mainloop
+{
+public:
+  Mainloop();
+  ~Mainloop();
+
+  operator uv_loop_t *() const { return m_loop; }
+
+  void Run(uv_run_mode mode = UV_RUN_DEFAULT);
+  void Stop();
+
+private:
+  uv_loop_t *m_loop;
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/exec_frontend.hpp

@@ -0,0 +1,27 @@
+#ifndef NNTPCHAN_EXEC_FRONTEND_HPP
+#define NNTPCHAN_EXEC_FRONTEND_HPP
+#include "frontend.hpp"
+#include <deque>
+
+namespace nntpchan
+{
+class ExecFrontend : public Frontend
+{
+public:
+  ExecFrontend(const std::string &exe);
+
+  ~ExecFrontend();
+
+  void ProcessNewMessage(const fs::path &fpath);
+  bool AcceptsNewsgroup(const std::string &newsgroup);
+  bool AcceptsMessage(const std::string &msgid);
+
+private:
+  int Exec(std::deque<std::string> args);
+
+private:
+  std::string m_exec;
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/file_handle.hpp

@@ -0,0 +1,23 @@
+#ifndef NNTPCHAN_FILE_HANDLE_HPP
+#define NNTPCHAN_FILE_HANDLE_HPP
+
+#include <experimental/filesystem>
+#include <fstream>
+#include <memory>
+
+namespace nntpchan
+{
+typedef std::unique_ptr<std::fstream> FileHandle_ptr;
+
+enum FileMode
+{
+  eRead,
+  eWrite
+};
+
+namespace fs = std::experimental::filesystem;
+
+FileHandle_ptr OpenFile(const fs::path &fname, FileMode mode);
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/frontend.hpp

@@ -0,0 +1,27 @@
+#ifndef NNTPCHAN_FRONTEND_HPP
+#define NNTPCHAN_FRONTEND_HPP
+#include <experimental/filesystem>
+#include <memory>
+#include <string>
+namespace nntpchan
+{
+
+namespace fs = std::experimental::filesystem;
+/** @brief nntpchan frontend ui interface */
+class Frontend
+{
+public:
+  /** @brief process an inbound message stored at fpath that we have accepted. */
+  virtual void ProcessNewMessage(const fs::path &fpath) = 0;
+
+  /** @brief return true if we take posts in a newsgroup */
+  virtual bool AcceptsNewsgroup(const std::string &newsgroup) = 0;
+
+  /** @brief return true if we will accept a message given its message-id */
+  virtual bool AcceptsMessage(const std::string &msgid) = 0;
+};
+
+typedef std::unique_ptr<Frontend> Frontend_ptr;
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/http.hpp

@@ -0,0 +1,4 @@
+#ifndef NNTPCHAN_HTTP_HPP
+#define NNTPCHAN_HTTP_HPP
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/http_client.hpp

@@ -0,0 +1,4 @@
+#ifndef NNTPCHAN_HTTP_CLIENT_HPP
+#define NNTPCHAN_HTTP_CLIENT_HPP
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/http_server.hpp

@@ -0,0 +1,4 @@
+#ifndef NNTPCHAN_HTTP_SERVER_HPP
+#define NNTPCHAN_HTTP_SERVER_HPP
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/io_handle.hpp

@@ -0,0 +1,11 @@
+#ifndef NNTPCHAN_IO_HANDLE_HPP
+#define NNTPCHAN_IO_HANDLE_HPP
+#include <iostream>
+#include <memory>
+
+namespace nntpchan
+{
+typedef std::unique_ptr<std::iostream> IOHandle_ptr;
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/line.hpp

@@ -0,0 +1,32 @@
+#ifndef NNTPCHAN_LINE_HPP
+#define NNTPCHAN_LINE_HPP
+#include "server.hpp"
+#include <stdint.h>
+namespace nntpchan
+{
+
+/** @brief a buffered line reader */
+class LineReader
+{
+public:
+  LineReader(size_t lineLimit);
+
+  /** @brief queue inbound data from connection */
+  void Data(const char *data, ssize_t s);
+
+  /** implements IConnHandler */
+  virtual bool ShouldClose();
+
+protected:
+  /** @brief handle a line from the client */
+  virtual void HandleLine(const std::string &line) = 0;
+
+private:
+  void OnLine(const char *d, const size_t l);
+  std::string m_leftovers;
+  bool m_close;
+  const size_t lineLimit;
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/message.hpp

@@ -0,0 +1,21 @@
+#ifndef NNTPCHAN_MESSAGE_HPP
+#define NNTPCHAN_MESSAGE_HPP
+
+#include <memory>
+#include <nntpchan/model.hpp>
+
+namespace nntpchan
+{
+struct MessageDB
+{
+  using BoardPage = nntpchan::model::BoardPage;
+  using Thread = nntpchan::model::Thread;
+  virtual bool LoadBoardPage(BoardPage &board, const std::string &newsgroup, uint32_t perpage, uint32_t page) const = 0;
+  virtual bool FindThreadByHash(const std::string &hashhex, std::string &msgid) const = 0;
+  virtual bool LoadThread(Thread &thread, const std::string &rootmsgid) const = 0;
+};
+
+typedef std::unique_ptr<MessageDB> MessageDB_ptr;
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/mime.hpp

@@ -0,0 +1,29 @@
+#ifndef NNTPCHAN_MIME_HPP
+#define NNTPCHAN_MIME_HPP
+#include "file_handle.hpp"
+#include "io_handle.hpp"
+#include <functional>
+#include <map>
+#include <string>
+
+namespace nntpchan
+{
+
+typedef std::map<std::string, std::string> RawHeader;
+
+bool ReadHeader(const FileHandle_ptr &f, RawHeader &h);
+
+struct MimePart
+{
+  virtual RawHeader &Header() = 0;
+  virtual IOHandle_ptr OpenPart() = 0;
+};
+
+typedef std::unique_ptr<MimePart> MimePart_ptr;
+
+typedef std::function<bool(MimePart_ptr)> PartReader;
+
+bool ReadParts(const FileHandle_ptr &f, PartReader r);
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/model.hpp

@@ -0,0 +1,59 @@
+#ifndef NNTPCHAN_MODEL_HPP
+#define NNTPCHAN_MODEL_HPP
+#include <algorithm>
+#include <map>
+#include <nntpchan/sanitize.hpp>
+#include <set>
+#include <string>
+#include <tuple>
+#include <variant>
+#include <vector>
+
+namespace nntpchan
+{
+namespace model
+{
+// MIME Header
+typedef std::map<std::string, std::vector<std::string>> PostHeader;
+// text post contents
+typedef std::string PostBody;
+// single file attachment, (orig_filename, hexdigest, thumb_filename)
+typedef std::tuple<std::string, std::string, std::string> PostAttachment;
+// all attachments on a post
+typedef std::vector<PostAttachment> Attachments;
+// a post (header, Post Text, Attachments)
+typedef std::tuple<PostHeader, PostBody, Attachments> Post;
+// a thread (many posts in post order)
+typedef std::vector<Post> Thread;
+// a board page is many threads in bump order
+typedef std::vector<Thread> BoardPage;
+
+static inline const std::string &GetFilename(const PostAttachment &att) { return std::get<0>(att); }
+
+static inline const std::string &GetHexDigest(const PostAttachment &att) { return std::get<1>(att); }
+
+static inline const std::string &GetThumbnail(const PostAttachment &att) { return std::get<2>(att); }
+
+static inline const PostHeader &GetHeader(const Post &post) { return std::get<0>(post); }
+
+static inline const PostBody &GetBody(const Post &post) { return std::get<1>(post); }
+
+static inline const Attachments &GetAttachments(const Post &post) { return std::get<2>(post); }
+
+static inline const std::string &HeaderIFind(const PostHeader &header, const std::string &val,
+                                             const std::string &fallback)
+{
+  std::string ival = ToLower(val);
+  auto itr = std::find_if(header.begin(), header.end(),
+                          [ival](const auto &item) -> bool { return ToLower(item.first) == ival; });
+  if (itr == std::end(header))
+    return fallback;
+  else
+    return itr->second[0];
+}
+
+using Model = std::variant<Thread, BoardPage>;
+}
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/net.hpp

@@ -0,0 +1,23 @@
+#ifndef NNTPCHAN_NET_HPP
+#define NNTPCHAN_NET_HPP
+
+#include <netinet/in.h>
+#include <string>
+#include <sys/types.h>
+
+namespace nntpchan
+{
+struct NetAddr
+{
+  NetAddr();
+
+  sockaddr_in6 addr;
+  operator sockaddr *() { return (sockaddr *)&addr; }
+  operator const sockaddr *() const { return (sockaddr *)&addr; }
+  std::string to_string();
+};
+
+NetAddr ParseAddr(const std::string &addr);
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/nntp_auth.hpp

@@ -0,0 +1,64 @@
+#ifndef NNTPCHAN_NNTP_AUTH_HPP
+#define NNTPCHAN_NNTP_AUTH_HPP
+#include "line.hpp"
+#include <fstream>
+#include <iostream>
+#include <memory>
+#include <mutex>
+#include <string>
+
+namespace nntpchan
+{
+/** @brief nntp credential db interface */
+class NNTPCredentialDB
+{
+public:
+  /** @brief open connection to database, return false on error otherwise return true */
+  virtual bool Open() = 0;
+  /** @brief close connection to database */
+  virtual void Close() = 0;
+  /** @brief return true if username password combo is correct */
+  virtual bool CheckLogin(const std::string &user, const std::string &passwd) = 0;
+  virtual ~NNTPCredentialDB() {}
+};
+
+typedef std::shared_ptr<NNTPCredentialDB> CredDB_ptr;
+
+/** @brief nntp credential db using hashed+salted passwords */
+class HashedCredDB : public NNTPCredentialDB, public LineReader
+{
+public:
+  HashedCredDB();
+  bool CheckLogin(const std::string &user, const std::string &passwd);
+
+protected:
+  void SetStream(std::istream *i);
+
+  std::string Hash(const std::string &data, const std::string &salt);
+  void HandleLine(const std::string &line);
+
+private:
+  bool ProcessLine(const std::string &line);
+
+  std::mutex m_access;
+  std::string m_user, m_passwd;
+  bool m_found;
+  /** return true if we have a line that matches this username / password combo */
+  std::istream *m_instream;
+};
+
+class HashedFileDB : public HashedCredDB
+{
+public:
+  HashedFileDB(const std::string &fname);
+  ~HashedFileDB();
+  bool Open();
+  void Close();
+
+private:
+  std::string m_fname;
+  std::ifstream f;
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/nntp_handler.hpp

@@ -0,0 +1,61 @@
+#ifndef NNTPCHAN_NNTP_HANDLER_HPP
+#define NNTPCHAN_NNTP_HANDLER_HPP
+#include "line.hpp"
+#include "nntp_auth.hpp"
+#include "storage.hpp"
+#include <deque>
+#include <string>
+
+namespace nntpchan
+{
+class NNTPServerHandler : public LineReader, public IConnHandler
+{
+public:
+  NNTPServerHandler(const fs::path &storage);
+  ~NNTPServerHandler();
+
+  virtual bool ShouldClose();
+
+  void SetAuth(CredDB_ptr creds);
+
+  virtual void OnData(const char *, ssize_t);
+
+  void Greet();
+
+protected:
+  void HandleLine(const std::string &line);
+  void HandleCommand(const std::deque<std::string> &command);
+
+private:
+  enum State
+  {
+    eStateReadCommand,
+    eStateStoreArticle,
+    eStateQuit
+  };
+
+private:
+  void EnterState(State st);
+
+  void ArticleObtained();
+
+  // handle quit command, this queues a reply
+  void Quit();
+
+  // switch nntp modes, this queues a reply
+  void SwitchMode(const std::string &mode);
+
+  bool PostingAllowed();
+
+private:
+  std::string m_articleName;
+  FileHandle_ptr m_article;
+  CredDB_ptr m_auth;
+  ArticleStorage_ptr m_store;
+  std::string m_mode;
+  bool m_authed;
+  State m_state;
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/nntp_server.hpp

@@ -0,0 +1,57 @@
+#ifndef NNTPCHAN_NNTP_SERVER_HPP
+#define NNTPCHAN_NNTP_SERVER_HPP
+#include "frontend.hpp"
+#include "server.hpp"
+#include <deque>
+#include <string>
+#include <uv.h>
+
+namespace nntpchan
+{
+
+class NNTPServer : public Server
+{
+public:
+  NNTPServer(uv_loop_t *loop);
+
+  virtual ~NNTPServer();
+
+  void SetStoragePath(const std::string &path);
+
+  void SetLoginDB(const std::string path);
+
+  void SetInstanceName(const std::string &name);
+
+  std::string InstanceName() const;
+
+  void Close();
+
+  virtual IServerConn *CreateConn(uv_stream_t *s);
+
+  virtual void OnAcceptError(int status);
+
+  void SetFrontend(Frontend *f);
+
+private:
+  std::string m_logindbpath;
+  std::string m_storagePath;
+  std::string m_servername;
+
+  Frontend_ptr m_frontend;
+};
+
+class NNTPServerConn : public IServerConn
+{
+public:
+  NNTPServerConn(uv_loop_t *l, uv_stream_t *s, Server *parent, IConnHandler *h) : IServerConn(l, s, parent, h) {}
+
+  virtual bool IsTimedOut() { return false; };
+
+  /** @brief send next queued reply */
+  virtual void SendNextReply();
+
+  virtual void Greet();
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/sanitize.hpp

@@ -0,0 +1,14 @@
+#ifndef NNTPCHAN_SANITIZE_HPP
+#define NNTPCHAN_SANITIZE_HPP
+#include <string>
+
+namespace nntpchan
+{
+std::string NNTPSanitizeLine(const std::string &str);
+std::string ToLower(const std::string &str);
+std::string StripWhitespaces(const std::string &str);
+bool IsValidMessageID(const std::string &msgid);
+bool IsValidNewsgroup(const std::string &group);
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/server.hpp

@@ -0,0 +1,97 @@
+#ifndef NNTPCHAN_SERVER_HPP
+#define NNTPCHAN_SERVER_HPP
+#include <deque>
+#include <functional>
+#include <string>
+#include <uv.h>
+
+namespace nntpchan
+{
+
+class Server;
+
+struct IConnHandler
+{
+
+  virtual ~IConnHandler(){};
+
+  /** got inbound data */
+  virtual void OnData(const char *data, ssize_t s) = 0;
+
+  /** get next line of data to send */
+  std::string GetNextLine();
+
+  /** return true if we have a line to send */
+  bool HasNextLine();
+
+  /** return true if we should close this connection otherwise return false */
+  virtual bool ShouldClose() = 0;
+
+  /** queue a data send */
+  void QueueLine(const std::string &line);
+
+  virtual void Greet() = 0;
+
+private:
+  std::deque<std::string> m_sendlines;
+};
+
+/** server connection handler interface */
+struct IServerConn
+{
+  IServerConn(uv_loop_t *l, uv_stream_t *s, Server *parent, IConnHandler *h);
+  virtual ~IServerConn();
+  virtual void Close();
+  virtual void Greet() = 0;
+  virtual void SendNextReply() = 0;
+  virtual bool IsTimedOut() = 0;
+  void SendString(const std::string &str);
+  Server *Parent() { return m_parent; };
+  IConnHandler *GetHandler() { return m_handler; };
+  uv_loop_t *GetLoop() { return m_loop; };
+
+private:
+  uv_tcp_t m_conn;
+  uv_loop_t *m_loop;
+  Server *m_parent;
+  IConnHandler *m_handler;
+};
+
+class Server
+{
+public:
+  Server(uv_loop_t *loop);
+  /** called after socket close, NEVER call directly */
+  virtual ~Server() {}
+  /** create connection handler from open stream */
+  virtual IServerConn *CreateConn(uv_stream_t *s) = 0;
+  /** close all sockets and stop */
+  void Close();
+  /** bind to address */
+  void Bind(const std::string &addr);
+
+  typedef std::function<void(IServerConn *)> ConnVisitor;
+
+  /** visit all open connections */
+  void VisitConns(ConnVisitor v);
+
+  /** remove connection from server, called after proper close */
+  void RemoveConn(IServerConn *conn);
+
+protected:
+  uv_loop_t *GetLoop() { return m_loop; }
+  virtual void OnAcceptError(int status) = 0;
+
+private:
+  operator uv_handle_t *() { return (uv_handle_t *)&m_server; }
+  operator uv_tcp_t *() { return &m_server; }
+  operator uv_stream_t *() { return (uv_stream_t *)&m_server; }
+
+  void OnAccept(uv_stream_t *s, int status);
+  std::deque<IServerConn *> m_conns;
+  uv_tcp_t m_server;
+  uv_loop_t *m_loop;
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/sha1.hpp

@@ -0,0 +1,11 @@
+#ifndef NNTPCHAN_SHA1_HPP
+#define NNTPCHAN_SHA1_HPP
+
+#include <string>
+
+namespace nntpchan
+{
+std::string sha1_hex(const std::string &data);
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/staticfile_frontend.hpp

@@ -0,0 +1,34 @@
+#ifndef NNTPCHAN_STATICFILE_FRONTEND_HPP
+#define NNTPCHAN_STATICFILE_FRONTEND_HPP
+#include "frontend.hpp"
+#include "message.hpp"
+#include "model.hpp"
+#include "template_engine.hpp"
+#include <experimental/filesystem>
+
+namespace nntpchan
+{
+
+namespace fs = std::experimental::filesystem;
+
+class StaticFileFrontend : public Frontend
+{
+public:
+  StaticFileFrontend(TemplateEngine *tmpl, const std::string &templateDir, const std::string &outDir, uint32_t pages);
+
+  ~StaticFileFrontend();
+
+  void ProcessNewMessage(const fs::path &fpath);
+  bool AcceptsNewsgroup(const std::string &newsgroup);
+  bool AcceptsMessage(const std::string &msgid);
+
+private:
+  MessageDB_ptr m_MessageDB;
+  TemplateEngine_ptr m_TemplateEngine;
+  fs::path m_TemplateDir;
+  fs::path m_OutDir;
+  uint32_t m_Pages;
+};
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/storage.hpp

@@ -0,0 +1,51 @@
+#ifndef NNTPCHAN_STORAGE_HPP
+#define NNTPCHAN_STORAGE_HPP
+
+#include "file_handle.hpp"
+#include "message.hpp"
+#include <experimental/filesystem>
+#include <string>
+
+namespace nntpchan
+{
+
+namespace fs = std::experimental::filesystem;
+
+class ArticleStorage : public MessageDB
+{
+public:
+  ArticleStorage(const fs::path &fpath);
+  ~ArticleStorage();
+
+  FileHandle_ptr OpenWrite(const std::string &msgid) const;
+  FileHandle_ptr OpenRead(const std::string &msgid) const;
+
+  /**
+     return true if we should accept a new message give its message id
+   */
+  bool Accept(const std::string &msgid) const;
+
+  bool LoadBoardPage(BoardPage &board, const std::string &newsgroup, uint32_t perpage, uint32_t page) const;
+  bool FindThreadByHash(const std::string &hashhex, std::string &msgid) const;
+  bool LoadThread(Thread &thread, const std::string &rootmsgid) const;
+
+  /** ensure symlinks are formed for this article by message id */
+  void EnsureSymlinks(const std::string &msgid) const;
+
+private:
+  void SetPath(const fs::path &fpath);
+
+  fs::path MessagePath(const std::string &msgid) const;
+
+  bool init_skiplist(const std::string &subdir) const;
+
+  fs::path skiplist_root(const std::string &name) const;
+  fs::path skiplist_dir(const fs::path & root, const std::string & name) const;
+
+  fs::path basedir;
+};
+
+typedef std::unique_ptr<ArticleStorage> ArticleStorage_ptr;
+}
+
+#endif

contrib/backends/nntpchan-daemon/include/nntpchan/template_engine.hpp

@@ -0,0 +1,24 @@
+#ifndef NNTPCHAN_TEMPLATE_ENGINE_HPP
+#define NNTPCHAN_TEMPLATE_ENGINE_HPP
+#include "file_handle.hpp"
+#include "model.hpp"
+#include <any>
+#include <map>
+#include <memory>
+#include <string>
+
+namespace nntpchan
+{
+
+struct TemplateEngine
+{
+  typedef std::map<std::string, std::variant<nntpchan::model::Model, std::string>> Args_t;
+  virtual bool WriteTemplate(const fs::path &template_fpath, const Args_t &args, const FileHandle_ptr &out) = 0;
+};
+
+TemplateEngine *CreateTemplateEngine(const std::string &dialect);
+
+typedef std::unique_ptr<TemplateEngine> TemplateEngine_ptr;
+}
+
+#endif

contrib/backends/nntpchan-daemon/libmustache/mstch.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+
+#include "mstch/mstch.hpp"
+#include "render_context.hpp"
+
+using namespace mstch;
+
+std::function<std::string(const std::string&)> mstch::config::escape;
+
+std::string mstch::render(
+    const std::string& tmplt,
+    const node& root,
+    const std::map<std::string,std::string>& partials)
+{
+  std::map<std::string, template_type> partial_templates;
+  for (auto& partial: partials)
+    partial_templates.insert({partial.first, {partial.second}});
+
+  return render_context(root, partial_templates).render(tmplt);
+}

contrib/backends/nntpchan-daemon/libmustache/render_context.cpp

@@ -0,0 +1,62 @@
+#include "render_context.hpp"
+#include "state/outside_section.hpp"
+#include "visitor/get_token.hpp"
+
+using namespace mstch;
+
+const mstch::node render_context::null_node;
+
+render_context::push::push(render_context &context, const mstch::node &node) : m_context(context)
+{
+  context.m_nodes.emplace_front(node);
+  context.m_node_ptrs.emplace_front(&node);
+  context.m_state.push(std::unique_ptr<render_state>(new outside_section));
+}
+
+render_context::push::~push()
+{
+  m_context.m_nodes.pop_front();
+  m_context.m_node_ptrs.pop_front();
+  m_context.m_state.pop();
+}
+
+std::string render_context::push::render(const template_type &templt) { return m_context.render(templt); }
+
+render_context::render_context(const mstch::node &node, const std::map<std::string, template_type> &partials)
+    : m_partials(partials), m_nodes(1, node), m_node_ptrs(1, &node)
+{
+  m_state.push(std::unique_ptr<render_state>(new outside_section));
+}
+
+const mstch::node &render_context::find_node(const std::string &token, std::list<node const *> current_nodes)
+{
+  if (token != "." && token.find('.') != std::string::npos)
+    return find_node(token.substr(token.rfind('.') + 1),
+                     {&find_node(token.substr(0, token.rfind('.')), current_nodes)});
+  else
+    for (auto &node : current_nodes)
+      if (visit(has_token(token), *node))
+        return visit(get_token(token, *node), *node);
+  return null_node;
+}
+
+const mstch::node &render_context::get_node(const std::string &token) { return find_node(token, m_node_ptrs); }
+
+std::string render_context::render(const template_type &templt, const std::string &prefix)
+{
+  std::string output;
+  bool prev_eol = true;
+  for (auto &token : templt)
+  {
+    if (prev_eol && prefix.length() != 0)
+      output += m_state.top()->render(*this, {prefix});
+    output += m_state.top()->render(*this, token);
+    prev_eol = token.eol();
+  }
+  return output;
+}
+
+std::string render_context::render_partial(const std::string &partial_name, const std::string &prefix)
+{
+  return m_partials.count(partial_name) ? render(m_partials.at(partial_name), prefix) : "";
+}

contrib/backends/nntpchan-daemon/libmustache/render_context.hpp

@@ -0,0 +1,47 @@
+#pragma once
+
+#include <deque>
+#include <list>
+#include <sstream>
+#include <stack>
+#include <string>
+
+#include "state/render_state.hpp"
+#include "template_type.hpp"
+#include <mstch/mstch.hpp>
+
+namespace mstch
+{
+
+class render_context
+{
+public:
+  class push
+  {
+  public:
+    push(render_context &context, const mstch::node &node = {});
+    ~push();
+    std::string render(const template_type &templt);
+
+  private:
+    render_context &m_context;
+  };
+
+  render_context(const mstch::node &node, const std::map<std::string, template_type> &partials);
+  const mstch::node &get_node(const std::string &token);
+  std::string render(const template_type &templt, const std::string &prefix = "");
+  std::string render_partial(const std::string &partial_name, const std::string &prefix);
+  template <class T, class... Args> void set_state(Args &&... args)
+  {
+    m_state.top() = std::unique_ptr<render_state>(new T(std::forward<Args>(args)...));
+  }
+
+private:
+  static const mstch::node null_node;
+  const mstch::node &find_node(const std::string &token, std::list<node const *> current_nodes);
+  std::map<std::string, template_type> m_partials;
+  std::deque<mstch::node> m_nodes;
+  std::list<const mstch::node *> m_node_ptrs;
+  std::stack<std::unique_ptr<render_state>> m_state;
+};
+}

contrib/backends/nntpchan-daemon/libmustache/state/in_section.cpp

@@ -0,0 +1,36 @@
+#include "in_section.hpp"
+#include "../visitor/is_node_empty.hpp"
+#include "../visitor/render_section.hpp"
+#include "outside_section.hpp"
+
+using namespace mstch;
+
+in_section::in_section(type type, const token &start_token)
+    : m_type(type), m_start_token(start_token), m_skipped_openings(0)
+{
+}
+
+std::string in_section::render(render_context &ctx, const token &token)
+{
+  if (token.token_type() == token::type::section_close)
+    if (token.name() == m_start_token.name() && m_skipped_openings == 0)
+    {
+      auto &node = ctx.get_node(m_start_token.name());
+      std::string out;
+
+      if (m_type == type::normal && !visit(is_node_empty(), node))
+        out = visit(render_section(ctx, m_section, m_start_token.delims()), node);
+      else if (m_type == type::inverted && visit(is_node_empty(), node))
+        out = render_context::push(ctx).render(m_section);
+
+      ctx.set_state<outside_section>();
+      return out;
+    }
+    else
+      m_skipped_openings--;
+  else if (token.token_type() == token::type::inverted_section_open || token.token_type() == token::type::section_open)
+    m_skipped_openings++;
+
+  m_section << token;
+  return "";
+}

contrib/backends/nntpchan-daemon/libmustache/state/in_section.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <sstream>
+#include <vector>
+
+#include "../template_type.hpp"
+#include "render_state.hpp"
+
+namespace mstch
+{
+
+class in_section : public render_state
+{
+public:
+  enum class type
+  {
+    inverted,
+    normal
+  };
+  in_section(type type, const token &start_token);
+  std::string render(render_context &context, const token &token) override;
+
+private:
+  const type m_type;
+  const token &m_start_token;
+  template_type m_section;
+  int m_skipped_openings;
+};
+}

contrib/backends/nntpchan-daemon/libmustache/state/outside_section.cpp

@@ -0,0 +1,32 @@
+#include "outside_section.hpp"
+
+#include "../render_context.hpp"
+#include "../visitor/render_node.hpp"
+#include "in_section.hpp"
+
+using namespace mstch;
+
+std::string outside_section::render(render_context &ctx, const token &token)
+{
+  using flag = render_node::flag;
+  switch (token.token_type())
+  {
+  case token::type::section_open:
+    ctx.set_state<in_section>(in_section::type::normal, token);
+    break;
+  case token::type::inverted_section_open:
+    ctx.set_state<in_section>(in_section::type::inverted, token);
+    break;
+  case token::type::variable:
+    return visit(render_node(ctx, flag::escape_html), ctx.get_node(token.name()));
+  case token::type::unescaped_variable:
+    return visit(render_node(ctx, flag::none), ctx.get_node(token.name()));
+  case token::type::text:
+    return token.raw();
+  case token::type::partial:
+    return ctx.render_partial(token.name(), token.partial_prefix());
+  default:
+    break;
+  }
+  return "";
+}

contrib/backends/nntpchan-daemon/libmustache/state/outside_section.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "render_state.hpp"
+
+namespace mstch
+{
+
+class outside_section : public render_state
+{
+public:
+  std::string render(render_context &context, const token &token) override;
+};
+}

contrib/backends/nntpchan-daemon/libmustache/state/render_state.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <memory>
+
+#include "../token.hpp"
+
+namespace mstch
+{
+
+class render_context;
+
+class render_state
+{
+public:
+  virtual ~render_state() {}
+  virtual std::string render(render_context &context, const token &token) = 0;
+};
+}

contrib/backends/nntpchan-daemon/libmustache/template_type.cpp

@@ -0,0 +1,110 @@
+#include "template_type.hpp"
+
+using namespace mstch;
+
+template_type::template_type(const std::string &str, const delim_type &delims)
+    : m_open(delims.first), m_close(delims.second)
+{
+  tokenize(str);
+  strip_whitespace();
+}
+
+template_type::template_type(const std::string &str) : m_open("{{"), m_close("}}")
+{
+  tokenize(str);
+  strip_whitespace();
+}
+
+void template_type::process_text(citer begin, citer end)
+{
+  if (begin == end)
+    return;
+  auto start = begin;
+  for (auto it = begin; it != end; ++it)
+    if (*it == '\n' || it == end - 1)
+    {
+      m_tokens.push_back({{start, it + 1}});
+      start = it + 1;
+    }
+}
+
+void template_type::tokenize(const std::string &tmp)
+{
+  citer beg = tmp.begin();
+  auto npos = std::string::npos;
+
+  for (std::size_t cur_pos = 0; cur_pos < tmp.size();)
+  {
+    auto open_pos = tmp.find(m_open, cur_pos);
+    auto close_pos = tmp.find(m_close, open_pos == npos ? open_pos : open_pos + 1);
+
+    if (close_pos != npos && open_pos != npos)
+    {
+      if (*(beg + open_pos + m_open.size()) == '{' && *(beg + close_pos + m_close.size()) == '}')
+        ++close_pos;
+
+      process_text(beg + cur_pos, beg + open_pos);
+      cur_pos = close_pos + m_close.size();
+      m_tokens.push_back({{beg + open_pos, beg + close_pos + m_close.size()}, m_open.size(), m_close.size()});
+
+      if (cur_pos == tmp.size())
+      {
+        m_tokens.push_back({{""}});
+        m_tokens.back().eol(true);
+      }
+
+      if (*(beg + open_pos + m_open.size()) == '=' && *(beg + close_pos - 1) == '=')
+      {
+        auto tok_beg = beg + open_pos + m_open.size() + 1;
+        auto tok_end = beg + close_pos - 1;
+        auto front_skip = first_not_ws(tok_beg, tok_end);
+        auto back_skip = first_not_ws(reverse(tok_end), reverse(tok_beg));
+        m_open = {front_skip, beg + tmp.find(' ', front_skip - beg)};
+        m_close = {beg + tmp.rfind(' ', back_skip - beg) + 1, back_skip + 1};
+      }
+    }
+    else
+    {
+      process_text(beg + cur_pos, tmp.end());
+      cur_pos = close_pos;
+    }
+  }
+}
+
+void template_type::strip_whitespace()
+{
+  auto line_begin = m_tokens.begin();
+  bool has_tag = false, non_space = false;
+
+  for (auto it = m_tokens.begin(); it != m_tokens.end(); ++it)
+  {
+    auto type = (*it).token_type();
+    if (type != token::type::text && type != token::type::variable && type != token::type::unescaped_variable)
+      has_tag = true;
+    else if (!(*it).ws_only())
+      non_space = true;
+
+    if ((*it).eol())
+    {
+      if (has_tag && !non_space)
+      {
+        store_prefixes(line_begin);
+
+        auto c = line_begin;
+        for (bool end = false; !end; (*c).ws_only() ? c = m_tokens.erase(c) : ++c)
+          if ((end = (*c).eol()))
+            it = c - 1;
+      }
+
+      non_space = has_tag = false;
+      line_begin = it + 1;
+    }
+  }
+}
+
+void template_type::store_prefixes(std::vector<token>::iterator beg)
+{
+  for (auto cur = beg; !(*cur).eol(); ++cur)
+    if ((*cur).token_type() == token::type::partial && cur != beg && (*(cur - 1)).ws_only())
+      (*cur).partial_prefix((*(cur - 1)).raw());
+}

contrib/backends/nntpchan-daemon/libmustache/template_type.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "token.hpp"
+#include "utils.hpp"
+
+namespace mstch
+{
+
+class template_type
+{
+public:
+  template_type() = default;
+  template_type(const std::string &str);
+  template_type(const std::string &str, const delim_type &delims);
+  std::vector<token>::const_iterator begin() const { return m_tokens.begin(); }
+  std::vector<token>::const_iterator end() const { return m_tokens.end(); }
+  void operator<<(const token &token) { m_tokens.push_back(token); }
+
+private:
+  std::vector<token> m_tokens;
+  std::string m_open;
+  std::string m_close;
+  void strip_whitespace();
+  void process_text(citer beg, citer end);
+  void tokenize(const std::string &tmp);
+  void store_prefixes(std::vector<token>::iterator beg);
+};
+}

contrib/backends/nntpchan-daemon/libmustache/token.cpp

@@ -0,0 +1,57 @@
+#include "token.hpp"
+#include "utils.hpp"
+
+using namespace mstch;
+
+token::type token::token_info(char c)
+{
+  switch (c)
+  {
+  case '>':
+    return type::partial;
+  case '^':
+    return type::inverted_section_open;
+  case '/':
+    return type::section_close;
+  case '&':
+    return type::unescaped_variable;
+  case '#':
+    return type::section_open;
+  case '!':
+    return type::comment;
+  default:
+    return type::variable;
+  }
+}
+
+token::token(const std::string &str, std::size_t left, std::size_t right) : m_raw(str), m_eol(false), m_ws_only(false)
+{
+  if (left != 0 && right != 0)
+  {
+    if (str[left] == '=' && str[str.size() - right - 1] == '=')
+    {
+      m_type = type::delimiter_change;
+    }
+    else if (str[left] == '{' && str[str.size() - right - 1] == '}')
+    {
+      m_type = type::unescaped_variable;
+      m_name = {first_not_ws(str.begin() + left + 1, str.end() - right),
+                first_not_ws(str.rbegin() + 1 + right, str.rend() - left) + 1};
+    }
+    else
+    {
+      auto c = first_not_ws(str.begin() + left, str.end() - right);
+      m_type = token_info(*c);
+      if (m_type != type::variable)
+        c = first_not_ws(c + 1, str.end() - right);
+      m_name = {c, first_not_ws(str.rbegin() + right, str.rend() - left) + 1};
+      m_delims = {{str.begin(), str.begin() + left}, {str.end() - right, str.end()}};
+    }
+  }
+  else
+  {
+    m_type = type::text;
+    m_eol = (str.size() > 0 && str[str.size() - 1] == '\n');
+    m_ws_only = (str.find_first_not_of(" \r\n\t") == std::string::npos);
+  }
+}

contrib/backends/nntpchan-daemon/libmustache/token.hpp

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <string>
+
+namespace mstch
+{
+
+using delim_type = std::pair<std::string, std::string>;
+
+class token
+{
+public:
+  enum class type
+  {
+    text,
+    variable,
+    section_open,
+    section_close,
+    inverted_section_open,
+    unescaped_variable,
+    comment,
+    partial,
+    delimiter_change
+  };
+  token(const std::string &str, std::size_t left = 0, std::size_t right = 0);
+  type token_type() const { return m_type; };
+  const std::string &raw() const { return m_raw; };
+  const std::string &name() const { return m_name; };
+  const std::string &partial_prefix() const { return m_partial_prefix; };
+  const delim_type &delims() const { return m_delims; };
+  void partial_prefix(const std::string &p_partial_prefix) { m_partial_prefix = p_partial_prefix; };
+  bool eol() const { return m_eol; }
+  void eol(bool eol) { m_eol = eol; }
+  bool ws_only() const { return m_ws_only; }
+
+private:
+  type m_type;
+  std::string m_name;
+  std::string m_raw;
+  std::string m_partial_prefix;
+  delim_type m_delims;
+  bool m_eol;
+  bool m_ws_only;
+  type token_info(char c);
+};
+}

contrib/backends/nntpchan-daemon/libmustache/utils.cpp

@@ -0,0 +1,61 @@
+#include "utils.hpp"
+#include "mstch/mstch.hpp"
+
+mstch::citer mstch::first_not_ws(mstch::citer begin, mstch::citer end)
+{
+  for (auto it = begin; it != end; ++it)
+    if (*it != ' ')
+      return it;
+  return end;
+}
+
+mstch::citer mstch::first_not_ws(mstch::criter begin, mstch::criter end)
+{
+  for (auto rit = begin; rit != end; ++rit)
+    if (*rit != ' ')
+      return --(rit.base());
+  return --(end.base());
+}
+
+mstch::criter mstch::reverse(mstch::citer it) { return std::reverse_iterator<mstch::citer>(it); }
+
+std::string mstch::html_escape(const std::string &str)
+{
+  if (mstch::config::escape)
+    return mstch::config::escape(str);
+
+  std::string out;
+  citer start = str.begin();
+
+  auto add_escape = [&out, &start](const std::string &escaped, citer &it) {
+    out += std::string{start, it} + escaped;
+    start = it + 1;
+  };
+
+  for (auto it = str.begin(); it != str.end(); ++it)
+    switch (*it)
+    {
+    case '&':
+      add_escape("&amp;", it);
+      break;
+    case '\'':
+      add_escape("&#39;", it);
+      break;
+    case '"':
+      add_escape("&quot;", it);
+      break;
+    case '<':
+      add_escape("&lt;", it);
+      break;
+    case '>':
+      add_escape("&gt;", it);
+      break;
+    case '/':
+      add_escape("&#x2F;", it);
+      break;
+    default:
+      break;
+    }
+
+  return out + std::string{start, str.end()};
+}

contrib/backends/nntpchan-daemon/libmustache/utils.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <boost/variant/apply_visitor.hpp>
+#include <string>
+
+namespace mstch
+{
+
+using citer = std::string::const_iterator;
+using criter = std::string::const_reverse_iterator;
+
+citer first_not_ws(citer begin, citer end);
+citer first_not_ws(criter begin, criter end);
+std::string html_escape(const std::string &str);
+criter reverse(citer it);
+
+template <class... Args> auto visit(Args &&... args) -> decltype(boost::apply_visitor(std::forward<Args>(args)...))
+{
+  return boost::apply_visitor(std::forward<Args>(args)...);
+}
+}

contrib/backends/nntpchan-daemon/libmustache/visitor/get_token.hpp

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <boost/variant/static_visitor.hpp>
+
+#include "has_token.hpp"
+#include "mstch/mstch.hpp"
+
+namespace mstch
+{
+
+class get_token : public boost::static_visitor<const mstch::node &>
+{
+public:
+  get_token(const std::string &token, const mstch::node &node) : m_token(token), m_node(node) {}
+
+  template <class T> const mstch::node &operator()(const T &) const { return m_node; }
+
+  const mstch::node &operator()(const map &map) const { return map.at(m_token); }
+
+  const mstch::node &operator()(const std::shared_ptr<object> &object) const { return object->at(m_token); }
+
+private:
+  const std::string &m_token;
+  const mstch::node &m_node;
+};
+}

contrib/backends/nntpchan-daemon/libmustache/visitor/has_token.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <boost/variant/static_visitor.hpp>
+
+#include "mstch/mstch.hpp"
+
+namespace mstch
+{
+
+class has_token : public boost::static_visitor<bool>
+{
+public:
+  has_token(const std::string &token) : m_token(token) {}
+
+  template <class T> bool operator()(const T &) const { return m_token == "."; }
+
+  bool operator()(const map &map) const { return map.count(m_token) == 1; }
+
+  bool operator()(const std::shared_ptr<object> &object) const { return object->has(m_token); }
+
+private:
+  const std::string &m_token;
+};
+}

contrib/backends/nntpchan-daemon/libmustache/visitor/is_node_empty.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <boost/variant/static_visitor.hpp>
+
+#include "mstch/mstch.hpp"
+
+namespace mstch
+{
+
+class is_node_empty : public boost::static_visitor<bool>
+{
+public:
+  template <class T> bool operator()(const T &) const { return false; }
+
+  bool operator()(const std::nullptr_t &) const { return true; }
+
+  bool operator()(const int &value) const { return value == 0; }
+
+  bool operator()(const double &value) const { return value == 0; }
+
+  bool operator()(const bool &value) const { return !value; }
+
+  bool operator()(const std::string &value) const { return value == ""; }
+
+  bool operator()(const array &array) const { return array.size() == 0; }
+};
+}

contrib/backends/nntpchan-daemon/libmustache/visitor/render_node.hpp

@@ -0,0 +1,52 @@
+#pragma once
+
+#include <boost/variant/static_visitor.hpp>
+#include <sstream>
+
+#include "../render_context.hpp"
+#include "../utils.hpp"
+#include "mstch/mstch.hpp"
+
+namespace mstch
+{
+
+class render_node : public boost::static_visitor<std::string>
+{
+public:
+  enum class flag
+  {
+    none,
+    escape_html
+  };
+  render_node(render_context &ctx, flag p_flag = flag::none) : m_ctx(ctx), m_flag(p_flag) {}
+
+  template <class T> std::string operator()(const T &) const { return ""; }
+
+  std::string operator()(const int &value) const { return std::to_string(value); }
+
+  std::string operator()(const double &value) const
+  {
+    std::stringstream ss;
+    ss << value;
+    return ss.str();
+  }
+
+  std::string operator()(const bool &value) const { return value ? "true" : "false"; }
+
+  std::string operator()(const lambda &value) const
+  {
+    template_type interpreted{value([this](const mstch::node &n) { return visit(render_node(m_ctx), n); })};
+    auto rendered = render_context::push(m_ctx).render(interpreted);
+    return (m_flag == flag::escape_html) ? html_escape(rendered) : rendered;
+  }
+
+  std::string operator()(const std::string &value) const
+  {
+    return (m_flag == flag::escape_html) ? html_escape(value) : value;
+  }
+
+private:
+  render_context &m_ctx;
+  flag m_flag;
+};
+}

contrib/backends/nntpchan-daemon/libmustache/visitor/render_section.hpp

@@ -0,0 +1,58 @@
+#pragma once
+
+#include <boost/variant/static_visitor.hpp>
+
+#include "../render_context.hpp"
+#include "../utils.hpp"
+#include "mstch/mstch.hpp"
+#include "render_node.hpp"
+
+namespace mstch
+{
+
+class render_section : public boost::static_visitor<std::string>
+{
+public:
+  enum class flag
+  {
+    none,
+    keep_array
+  };
+  render_section(render_context &ctx, const template_type &section, const delim_type &delims, flag p_flag = flag::none)
+      : m_ctx(ctx), m_section(section), m_delims(delims), m_flag(p_flag)
+  {
+  }
+
+  template <class T> std::string operator()(const T &t) const
+  {
+    return render_context::push(m_ctx, t).render(m_section);
+  }
+
+  std::string operator()(const lambda &fun) const
+  {
+    std::string section_str;
+    for (auto &token : m_section)
+      section_str += token.raw();
+    template_type interpreted{fun([this](const mstch::node &n) { return visit(render_node(m_ctx), n); }, section_str),
+                              m_delims};
+    return render_context::push(m_ctx).render(interpreted);
+  }
+
+  std::string operator()(const array &array) const
+  {
+    std::string out;
+    if (m_flag == flag::keep_array)
+      return render_context::push(m_ctx, array).render(m_section);
+    else
+      for (auto &item : array)
+        out += visit(render_section(m_ctx, m_section, m_delims, flag::keep_array), item);
+    return out;
+  }
+
+private:
+  render_context &m_ctx;
+  const template_type &m_section;
+  const delim_type &m_delims;
+  flag m_flag;
+};
+}

contrib/backends/nntpchan-daemon/libnntpchan/base64.cpp

@@ -0,0 +1,334 @@
+#include <nntpchan/base64.hpp>
+
+// taken from i2pd
+namespace i2p
+{
+namespace data
+{
+
+static const char T32[32] = {
+    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
+    'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '2', '3', '4', '5', '6', '7',
+};
+
+const char *GetBase32SubstitutionTable() { return T32; }
+
+static void iT64Build(void);
+
+/*
+*
+* BASE64 Substitution Table
+* -------------------------
+*
+* Direct Substitution Table
+*/
+
+static const char T64[64] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+                             'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+                             'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+                             'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-', '~'};
+
+const char *GetBase64SubstitutionTable() { return T64; }
+
+/*
+* Reverse Substitution Table (built in run time)
+*/
+
+static char iT64[256];
+static int isFirstTime = 1;
+
+/*
+* Padding
+*/
+
+static char P64 = '=';
+
+/*
+*
+* ByteStreamToBase64
+* ------------------
+*
+* Converts binary encoded data to BASE64 format.
+*
+*/
+
+size_t                                          /* Number of bytes in the encoded buffer */
+    ByteStreamToBase64(const uint8_t *InBuffer, /* Input buffer, binary data */
+                       size_t InCount,          /* Number of bytes in the input buffer */
+                       char *OutBuffer,         /* output buffer */
+                       size_t len               /* length of output buffer */
+                       )
+
+{
+  unsigned char *ps;
+  unsigned char *pd;
+  unsigned char acc_1;
+  unsigned char acc_2;
+  int i;
+  int n;
+  int m;
+  size_t outCount;
+
+  ps = (unsigned char *)InBuffer;
+  n = InCount / 3;
+  m = InCount % 3;
+  if (!m)
+    outCount = 4 * n;
+  else
+    outCount = 4 * (n + 1);
+  if (outCount > len)
+    return 0;
+  pd = (unsigned char *)OutBuffer;
+  for (i = 0; i < n; i++)
+  {
+    acc_1 = *ps++;
+    acc_2 = (acc_1 << 4) & 0x30;
+    acc_1 >>= 2; /* base64 digit #1 */
+    *pd++ = T64[acc_1];
+    acc_1 = *ps++;
+    acc_2 |= acc_1 >> 4; /* base64 digit #2 */
+    *pd++ = T64[acc_2];
+    acc_1 &= 0x0f;
+    acc_1 <<= 2;
+    acc_2 = *ps++;
+    acc_1 |= acc_2 >> 6; /* base64 digit #3 */
+    *pd++ = T64[acc_1];
+    acc_2 &= 0x3f; /* base64 digit #4 */
+    *pd++ = T64[acc_2];
+  }
+  if (m == 1)
+  {
+    acc_1 = *ps++;
+    acc_2 = (acc_1 << 4) & 0x3f; /* base64 digit #2 */
+    acc_1 >>= 2;                 /* base64 digit #1 */
+    *pd++ = T64[acc_1];
+    *pd++ = T64[acc_2];
+    *pd++ = P64;
+    *pd++ = P64;
+  }
+  else if (m == 2)
+  {
+    acc_1 = *ps++;
+    acc_2 = (acc_1 << 4) & 0x3f;
+    acc_1 >>= 2; /* base64 digit #1 */
+    *pd++ = T64[acc_1];
+    acc_1 = *ps++;
+    acc_2 |= acc_1 >> 4; /* base64 digit #2 */
+    *pd++ = T64[acc_2];
+    acc_1 &= 0x0f;
+    acc_1 <<= 2; /* base64 digit #3 */
+    *pd++ = T64[acc_1];
+    *pd++ = P64;
+  }
+
+  return outCount;
+}
+
+/*
+*
+* Base64ToByteStream
+* ------------------
+*
+* Converts BASE64 encoded data to binary format. If input buffer is
+* not properly padded, buffer of negative length is returned
+*
+*/
+
+size_t                                       /* Number of output bytes */
+    Base64ToByteStream(const char *InBuffer, /* BASE64 encoded buffer */
+                       size_t InCount,       /* Number of input bytes */
+                       uint8_t *OutBuffer,   /* output buffer length */
+                       size_t len            /* length of output buffer */
+                       )
+{
+  unsigned char *ps;
+  unsigned char *pd;
+  unsigned char acc_1;
+  unsigned char acc_2;
+  int i;
+  int n;
+  int m;
+  size_t outCount;
+
+  if (isFirstTime)
+    iT64Build();
+  n = InCount / 4;
+  m = InCount % 4;
+  if (InCount && !m)
+    outCount = 3 * n;
+  else
+  {
+    outCount = 0;
+    return 0;
+  }
+
+  ps = (unsigned char *)(InBuffer + InCount - 1);
+  while (*ps-- == P64)
+    outCount--;
+  ps = (unsigned char *)InBuffer;
+
+  if (outCount > len)
+    return -1;
+  pd = OutBuffer;
+  auto endOfOutBuffer = OutBuffer + outCount;
+  for (i = 0; i < n; i++)
+  {
+    acc_1 = iT64[*ps++];
+    acc_2 = iT64[*ps++];
+    acc_1 <<= 2;
+    acc_1 |= acc_2 >> 4;
+    *pd++ = acc_1;
+    if (pd >= endOfOutBuffer)
+      break;
+
+    acc_2 <<= 4;
+    acc_1 = iT64[*ps++];
+    acc_2 |= acc_1 >> 2;
+    *pd++ = acc_2;
+    if (pd >= endOfOutBuffer)
+      break;
+
+    acc_2 = iT64[*ps++];
+    acc_2 |= acc_1 << 6;
+    *pd++ = acc_2;
+  }
+
+  return outCount;
+}
+
+size_t Base64EncodingBufferSize(const size_t input_size)
+{
+  auto d = div(input_size, 3);
+  if (d.rem)
+    d.quot++;
+  return 4 * d.quot;
+}
+
+size_t Base32EncodingBufferSize(const size_t input_size)
+{
+  auto d = div(input_size, 5);
+  if (d.rem)
+    d.quot++;
+  return 8 * d.quot;
+}
+/*
+*
+* iT64
+* ----
+* Reverse table builder. P64 character is replaced with 0
+*
+*
+*/
+
+static void iT64Build()
+{
+  int i;
+  isFirstTime = 0;
+  for (i = 0; i < 256; i++)
+    iT64[i] = -1;
+  for (i = 0; i < 64; i++)
+    iT64[(int)T64[i]] = i;
+  iT64[(int)P64] = 0;
+}
+
+size_t Base32ToByteStream(const char *inBuf, size_t len, uint8_t *outBuf, size_t outLen)
+{
+  int tmp = 0, bits = 0;
+  size_t ret = 0;
+  for (size_t i = 0; i < len; i++)
+  {
+    char ch = inBuf[i];
+    if (ch >= '2' && ch <= '7') // digit
+      ch = (ch - '2') + 26;     // 26 means a-z
+    else if (ch >= 'a' && ch <= 'z')
+      ch = ch - 'a'; // a = 0
+    else
+      return 0; // unexpected character
+
+    tmp |= ch;
+    bits += 5;
+    if (bits >= 8)
+    {
+      if (ret >= outLen)
+        return ret;
+      outBuf[ret] = tmp >> (bits - 8);
+      bits -= 8;
+      ret++;
+    }
+    tmp <<= 5;
+  }
+  return ret;
+}
+
+size_t ByteStreamToBase32(const uint8_t *inBuf, size_t len, char *outBuf, size_t outLen)
+{
+  size_t ret = 0, pos = 1;
+  int bits = 8, tmp = inBuf[0];
+  while (ret < outLen && (bits > 0 || pos < len))
+  {
+    if (bits < 5)
+    {
+      if (pos < len)
+      {
+        tmp <<= 8;
+        tmp |= inBuf[pos] & 0xFF;
+        pos++;
+        bits += 8;
+      }
+      else // last byte
+      {
+        tmp <<= (5 - bits);
+        bits = 5;
+      }
+    }
+
+    bits -= 5;
+    int ind = (tmp >> bits) & 0x1F;
+    outBuf[ret] = (ind < 26) ? (ind + 'a') : ((ind - 26) + '2');
+    ret++;
+  }
+  return ret;
+}
+}
+}
+
+namespace nntpchan
+{
+std::string B64Encode(const uint8_t *data, const std::size_t l)
+{
+  std::string out;
+  out.resize(i2p::data::Base64EncodingBufferSize(l));
+  i2p::data::ByteStreamToBase64(data, l, &out[0], out.size());
+  return out;
+}
+
+bool B64Decode(const std::string &data, std::vector<uint8_t> &out)
+{
+  out.resize(data.size());
+  if (i2p::data::Base64ToByteStream(data.c_str(), data.size(), &out[0], out.size()))
+  {
+    out.shrink_to_fit();
+    return true;
+  }
+  return false;
+}
+
+std::string B32Encode(const uint8_t *data, const std::size_t l)
+{
+  std::string out;
+  out.resize(i2p::data::Base32EncodingBufferSize(l));
+  i2p::data::ByteStreamToBase32(data, l, &out[0], out.size());
+  return out;
+}
+
+bool B32Decode(const std::string &data, std::vector<uint8_t> &out)
+{
+  out.resize(data.size());
+  if (i2p::data::Base32ToByteStream(data.c_str(), data.size(), &out[0], out.size()))
+  {
+    out.shrink_to_fit();
+    return true;
+  }
+  return false;
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/buffer.cpp

@@ -0,0 +1,17 @@
+#include <cstring>
+#include <nntpchan/buffer.hpp>
+
+namespace nntpchan
+{
+WriteBuffer::WriteBuffer(const char *b, const size_t s)
+{
+  char *buf = new char[s];
+  std::memcpy(buf, b, s);
+  this->b = uv_buf_init(buf, s);
+  w.data = this;
+}
+
+WriteBuffer::WriteBuffer(const std::string &s) : WriteBuffer(s.c_str(), s.size()) {}
+
+WriteBuffer::~WriteBuffer() { delete[] b.base; }
+}

contrib/backends/nntpchan-daemon/libnntpchan/crypto.cpp

@@ -0,0 +1,23 @@
+#include <cassert>
+#include <nntpchan/base64.hpp>
+#include <nntpchan/crypto.hpp>
+#include <sodium.h>
+
+namespace nntpchan
+{
+void SHA512(const uint8_t *d, const std::size_t l, SHA512Digest &h) { crypto_hash(h.data(), d, l); }
+
+  void Blake2B(const uint8_t *d, std::size_t l, Blake2BDigest & h) { crypto_generichash(h.data(), h.size(), d, l, nullptr, 0); }
+
+  std::string Blake2B_base32(const std::string & str)
+  {
+    Blake2BDigest d;
+    Blake2B(reinterpret_cast<const uint8_t*>(str.c_str()), str.size(), d);
+    return B32Encode(d.data(), d.size());
+  }
+
+  
+Crypto::Crypto() { assert(sodium_init() == 0); }
+
+Crypto::~Crypto() {}
+}

contrib/backends/nntpchan-daemon/libnntpchan/crypto_old.hpp

@@ -0,0 +1,28 @@
+
+
+#ifndef NNTPCHAN_CRYPTO_OLD_HPP
+#define NNTPCHAN_CRYPTO_OLD_HPP
+
+#include <cstdint>
+#include <cstdlib>
+extern "C" {
+
+typedef struct
+{
+  uint32_t state[5];
+  uint32_t count[2];
+  unsigned char buffer[64];
+} SHA1_CTX;
+
+void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]);
+
+void SHA1Init(SHA1_CTX *context);
+
+void SHA1Update(SHA1_CTX *context, const unsigned char *data, uint32_t len);
+
+void SHA1Final(unsigned char digest[20], SHA1_CTX *context);
+
+void sha1(uint8_t *hash_out, const uint8_t *str, size_t len);
+}
+
+#endif

contrib/backends/nntpchan-daemon/libnntpchan/event.cpp

@@ -0,0 +1,17 @@
+#include <cassert>
+#include <nntpchan/event.hpp>
+
+namespace nntpchan
+{
+Mainloop::Mainloop()
+{
+  m_loop = uv_default_loop();
+  assert(uv_loop_init(m_loop) == 0);
+}
+
+Mainloop::~Mainloop() { uv_loop_close(m_loop); }
+
+void Mainloop::Stop() { uv_stop(m_loop); }
+
+void Mainloop::Run(uv_run_mode mode) { assert(uv_run(m_loop, mode) == 0); }
+}

contrib/backends/nntpchan-daemon/libnntpchan/exec_frontend.cpp

@@ -0,0 +1,51 @@
+#include <cstring>
+#include <errno.h>
+#include <iostream>
+#include <nntpchan/exec_frontend.hpp>
+#include <sys/wait.h>
+#include <unistd.h>
+
+namespace nntpchan
+{
+ExecFrontend::ExecFrontend(const std::string &fname) : m_exec(fname) {}
+
+ExecFrontend::~ExecFrontend() {}
+
+void ExecFrontend::ProcessNewMessage(const fs::path &fpath) { Exec({"post", fpath}); }
+
+bool ExecFrontend::AcceptsNewsgroup(const std::string &newsgroup) { return Exec({"newsgroup", newsgroup}) == 0; }
+
+bool ExecFrontend::AcceptsMessage(const std::string &msgid) { return Exec({"msgid", msgid}) == 0; }
+
+int ExecFrontend::Exec(std::deque<std::string> args)
+{
+  // set up arguments
+  const char **cargs = new char const *[args.size() + 2];
+  std::size_t l = 0;
+  cargs[l++] = m_exec.c_str();
+  while (args.size())
+  {
+    cargs[l++] = args.front().c_str();
+    args.pop_front();
+  }
+  cargs[l] = 0;
+  int retcode = 0;
+  pid_t child = fork();
+  if (child)
+  {
+    waitpid(child, &retcode, 0);
+  }
+  else
+  {
+    int r = execvpe(m_exec.c_str(), (char *const *)cargs, environ);
+    if (r == -1)
+    {
+      std::cout << strerror(errno) << std::endl;
+      exit(errno);
+    }
+    else
+      exit(r);
+  }
+  return retcode;
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/file_handle.cpp

@@ -0,0 +1,21 @@
+#include <nntpchan/file_handle.hpp>
+
+namespace nntpchan
+{
+FileHandle_ptr OpenFile(const fs::path &fname, FileMode mode)
+{
+  std::fstream *f = new std::fstream;
+  if (mode == eRead)
+  {
+    f->open(fname, std::ios::in);
+  }
+  else if (mode == eWrite)
+  {
+    f->open(fname, std::ios::out);
+  }
+  if (f->is_open())
+    return FileHandle_ptr(f);
+  delete f;
+  return nullptr;
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/line.cpp

@@ -0,0 +1,45 @@
+#include <nntpchan/line.hpp>
+
+namespace nntpchan
+{
+
+LineReader::LineReader(size_t limit) : m_close(false), lineLimit(limit) {}
+
+void LineReader::Data(const char *data, ssize_t l)
+{
+  if (l <= 0)
+    return;
+  // process leftovers
+  std::size_t idx = 0;
+  std::size_t pos = 0;
+  while (l-- > 0)
+  {
+    char c = data[idx++];
+    if (c == '\n')
+    {
+      OnLine(data, pos);
+      pos = 0;
+      data += idx;
+    }
+    else if (c == '\r' && data[idx] == '\n')
+    {
+      OnLine(data, pos);
+      data += idx + 1;
+      pos = 0;
+    }
+    else
+    {
+      pos++;
+    }
+  }
+}
+
+void LineReader::OnLine(const char *d, const size_t l)
+{
+  std::string line;
+  line += std::string(d, l);
+  HandleLine(line);
+}
+
+bool LineReader::ShouldClose() { return m_close; }
+}

contrib/backends/nntpchan-daemon/libnntpchan/mime.cpp

@@ -0,0 +1,26 @@
+#include <nntpchan/mime.hpp>
+
+namespace nntpchan
+{
+bool ReadHeader(const FileHandle_ptr &file, RawHeader &header)
+{
+  std::string line;
+  while (std::getline(*file, line) && !(line == "\r" || line == ""))
+  {
+    std::string k, v;
+    auto idx = line.find(": ");
+    auto endidx = line.size() - 1;
+
+    while (line[endidx] == '\r')
+      --endidx;
+
+    if (idx != std::string::npos && idx + 2 < endidx)
+    {
+      k = line.substr(0, idx);
+      v = line.substr(idx + 2, endidx);
+      header[k] = v;
+    }
+  }
+  return file->good();
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/net.cpp

@@ -0,0 +1,44 @@
+#include <cstring>
+#include <nntpchan/net.hpp>
+#include <sstream>
+#include <stdexcept>
+#include <uv.h>
+
+namespace nntpchan
+{
+std::string NetAddr::to_string()
+{
+  std::string str("invalid");
+  const size_t s = 128;
+  char *buff = new char[s];
+  if (uv_ip6_name(&addr, buff, s) == 0)
+  {
+    str = std::string(buff);
+    delete[] buff;
+  }
+  std::stringstream ss;
+  ss << "[" << str << "]:" << ntohs(addr.sin6_port);
+  return ss.str();
+}
+
+NetAddr::NetAddr() { std::memset(&addr, 0, sizeof(addr)); }
+
+NetAddr ParseAddr(const std::string &addr)
+{
+  NetAddr saddr;
+  auto n = addr.rfind("]:");
+  if (n == std::string::npos)
+  {
+    throw std::runtime_error("invalid address: " + addr);
+  }
+  if (addr[0] != '[')
+  {
+    throw std::runtime_error("invalid address: " + addr);
+  }
+  auto p = addr.substr(n + 2);
+  int port = std::atoi(p.c_str());
+  auto a = addr.substr(0, n);
+  uv_ip6_addr(a.c_str(), port, &saddr.addr);
+  return saddr;
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/nntp_auth.cpp

@@ -0,0 +1,97 @@
+#include <array>
+#include <fstream>
+#include <iostream>
+#include <nntpchan/base64.hpp>
+#include <nntpchan/crypto.hpp>
+#include <nntpchan/nntp_auth.hpp>
+
+namespace nntpchan
+{
+HashedCredDB::HashedCredDB() : LineReader(1024) {}
+
+bool HashedCredDB::CheckLogin(const std::string &user, const std::string &passwd)
+{
+  std::unique_lock<std::mutex> lock(m_access);
+  m_found = false;
+  m_user = user;
+  m_passwd = passwd;
+  m_instream->seekg(0, std::ios::end);
+  const auto l = m_instream->tellg();
+  m_instream->seekg(0, std::ios::beg);
+  char *buff = new char[l];
+  // read file
+  m_instream->read(buff, l);
+  Data(buff, l);
+  delete[] buff;
+  return m_found;
+}
+
+bool HashedCredDB::ProcessLine(const std::string &line)
+{
+  // strip comments
+  auto comment = line.find("#");
+  std::string part = line;
+  for (; comment != std::string::npos; comment = part.find("#"))
+  {
+    if (comment)
+      part = part.substr(0, comment);
+    else
+      break;
+  }
+  if (!part.size())
+    return false; // empty line after comments
+  auto idx = part.find(":");
+  if (idx == std::string::npos)
+    return false; // bad format
+  if (m_user != part.substr(0, idx))
+    return false; // username mismatch
+  part = part.substr(idx + 1);
+
+  idx = part.find(":");
+  if (idx == std::string::npos)
+    return false; // bad format
+  std::string cred = part.substr(0, idx);
+  std::string salt = part.substr(idx + 1);
+  return Hash(m_passwd, salt) == cred;
+}
+
+void HashedCredDB::HandleLine(const std::string &line)
+{
+  if (m_found)
+    return;
+  if (ProcessLine(line))
+    m_found = true;
+}
+
+void HashedCredDB::SetStream(std::istream *s) { m_instream = s; }
+
+std::string HashedCredDB::Hash(const std::string &data, const std::string &salt)
+{
+  SHA512Digest h;
+  std::string d = data + salt;
+  SHA512((const uint8_t *)d.c_str(), d.size(), h);
+  return B64Encode(h.data(), h.size());
+}
+
+HashedFileDB::HashedFileDB(const std::string &fname) : m_fname(fname), f(nullptr) {}
+
+HashedFileDB::~HashedFileDB() {}
+
+void HashedFileDB::Close()
+{
+  if (f.is_open())
+    f.close();
+}
+
+bool HashedFileDB::Open()
+{
+  if (!f.is_open())
+    f.open(m_fname);
+  if (f.is_open())
+  {
+    SetStream(&f);
+    return true;
+  }
+  return false;
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/nntp_handler.cpp

@@ -0,0 +1,234 @@
+#include <algorithm>
+#include <cctype>
+#include <cstring>
+#include <iostream>
+#include <nntpchan/nntp_handler.hpp>
+#include <nntpchan/sanitize.hpp>
+#include <sstream>
+#include <string>
+
+namespace nntpchan
+{
+NNTPServerHandler::NNTPServerHandler(const fs::path &storage)
+    : LineReader(1024), m_article(nullptr), m_auth(nullptr), m_store(std::make_unique<ArticleStorage>(storage)),
+      m_authed(false), m_state(eStateReadCommand)
+{
+}
+
+NNTPServerHandler::~NNTPServerHandler() {}
+
+void NNTPServerHandler::HandleLine(const std::string &line)
+{
+  if (m_state == eStateReadCommand)
+  {
+    std::deque<std::string> command;
+    std::istringstream s;
+    s.str(line);
+    for (std::string part; std::getline(s, part, ' ');)
+    {
+      if (part.size())
+        command.push_back(part);
+    }
+    if (command.size())
+      HandleCommand(command);
+    else
+      QueueLine("501 Syntax error");
+  }
+  else if (m_state == eStateStoreArticle)
+  {
+    std::string l = line + "\r\n";
+    OnData(l.c_str(), l.size());
+  }
+  else
+  {
+    std::cerr << "invalid state" << std::endl;
+  }
+}
+
+void NNTPServerHandler::OnData(const char *data, ssize_t l)
+{
+  if (l <= 0)
+    return;
+  if (m_state == eStateStoreArticle)
+  {
+    const char *end = strstr(data, "\r\n.\r\n");
+    if (end)
+    {
+      std::size_t diff = end - data;
+      if (m_article)
+      {
+        m_article->write(data, diff + 2);
+        m_article->flush();
+      }
+      ArticleObtained();
+      diff += 5;
+      Data(end + 5, l - diff);
+      return;
+    }
+    if (m_article)
+    {
+      m_article->write(data, l);
+      m_article->flush();
+    }
+  }
+  else
+    Data(data, l);
+}
+
+void NNTPServerHandler::HandleCommand(const std::deque<std::string> &command)
+{
+  auto cmd = command[0];
+  std::transform(cmd.begin(), cmd.end(), cmd.begin(), ::toupper);
+  std::size_t cmdlen = command.size();
+  for (const auto &part : command)
+    std::cerr << " " << part;
+  std::cerr << std::endl;
+  if (cmd == "QUIT")
+  {
+    Quit();
+    return;
+  }
+  else if (cmd[0] == '5')
+  {
+    return;
+  }
+  else if (cmd == "MODE")
+  {
+    if (cmdlen == 2)
+    {
+      // set mode
+      SwitchMode(command[1]);
+    }
+    else if (cmdlen)
+    {
+      // too many arguments
+      QueueLine("500 too many arguments");
+    }
+    else
+    {
+      // get mode
+      QueueLine("500 wrong arguments");
+    }
+  }
+  else if (cmd == "CAPABILITIES")
+  {
+    QueueLine("101 I support the following:");
+    QueueLine("READER");
+    QueueLine("IMPLEMENTATION nntpchan-daemon");
+    QueueLine("VERSION 2");
+    QueueLine("STREAMING");
+    QueueLine(".");
+  }
+  else if (cmd == "CHECK")
+  {
+    if (cmdlen >= 2)
+    {
+      const std::string &msgid = command[1];
+      if (IsValidMessageID(msgid) && m_store->Accept(msgid))
+      {
+        QueueLine("238 " + msgid);
+      }
+      else
+        QueueLine("438 " + msgid);
+    }
+    else
+      QueueLine("501 syntax error");
+  }
+  else if (cmd == "TAKETHIS")
+  {
+    if (cmdlen >= 2)
+    {
+      const std::string &msgid = command[1];
+      if (m_store->Accept(msgid))
+      {
+        m_article = m_store->OpenWrite(msgid);
+      }
+      m_articleName = msgid;
+      EnterState(eStateStoreArticle);
+      return;
+    }
+    QueueLine("501 invalid syntax");
+  }
+  else
+  {
+    // unknown command
+    QueueLine("500 Unknown Command");
+  }
+}
+
+void NNTPServerHandler::ArticleObtained()
+{
+  if (m_article)
+  {
+    m_article->close();
+    m_article = nullptr;
+    QueueLine("239 " + m_articleName);
+    std::cerr << "stored " << m_articleName << std::endl;
+  }
+  else
+    QueueLine("439 " + m_articleName);
+  m_articleName = "";
+  EnterState(eStateReadCommand);
+}
+
+void NNTPServerHandler::SwitchMode(const std::string &mode)
+{
+  std::string m = mode;
+  std::transform(m.begin(), m.end(), m.begin(), ::toupper);
+  if (m == "READER")
+  {
+    m_mode = m;
+    if (PostingAllowed())
+    {
+      QueueLine("200 Posting is permitted yo");
+    }
+    else
+    {
+      QueueLine("201 Posting is not permitted yo");
+    }
+  }
+  else if (m == "STREAM")
+  {
+    m_mode = m;
+    if (PostingAllowed())
+    {
+      QueueLine("203 Streaming enabled");
+    }
+    else
+    {
+      QueueLine("483 Streaming Denied");
+    }
+  }
+  else
+  {
+    // unknown mode
+    QueueLine("500 Unknown mode");
+  }
+}
+
+void NNTPServerHandler::EnterState(State st)
+{
+  std::cerr << "enter state " << st << std::endl;
+  m_state = st;
+}
+
+void NNTPServerHandler::Quit()
+{
+  EnterState(eStateQuit);
+  QueueLine("205 quitting");
+}
+
+bool NNTPServerHandler::ShouldClose() { return m_state == eStateQuit; }
+
+bool NNTPServerHandler::PostingAllowed() { return m_authed || m_auth == nullptr; }
+
+void NNTPServerHandler::Greet()
+{
+  if (PostingAllowed())
+    QueueLine("200 Posting allowed");
+  else
+    QueueLine("201 Posting not allowed");
+}
+
+void NNTPServerHandler::SetAuth(CredDB_ptr creds) { m_auth = creds; }
+}

contrib/backends/nntpchan-daemon/libnntpchan/nntp_server.cpp

@@ -0,0 +1,62 @@
+
+#include <cassert>
+#include <iostream>
+#include <nntpchan/net.hpp>
+#include <nntpchan/nntp_auth.hpp>
+#include <nntpchan/nntp_handler.hpp>
+#include <nntpchan/nntp_server.hpp>
+#include <sstream>
+
+namespace nntpchan
+{
+
+NNTPServer::NNTPServer(uv_loop_t *loop) : Server(loop), m_frontend(nullptr) {}
+
+NNTPServer::~NNTPServer() {}
+
+IServerConn *NNTPServer::CreateConn(uv_stream_t *s)
+{
+  CredDB_ptr creds;
+
+  std::ifstream i;
+  i.open(m_logindbpath);
+  if (i.is_open())
+    creds = std::make_shared<HashedFileDB>(m_logindbpath);
+
+  NNTPServerHandler *handler = new NNTPServerHandler(m_storagePath);
+  if (creds)
+    handler->SetAuth(creds);
+
+  NNTPServerConn *conn = new NNTPServerConn(GetLoop(), s, this, handler);
+  return conn;
+}
+
+void NNTPServer::SetLoginDB(const std::string path) { m_logindbpath = path; }
+
+void NNTPServer::SetStoragePath(const std::string &path) { m_storagePath = path; }
+
+void NNTPServer::SetInstanceName(const std::string &name) { m_servername = name; }
+
+void NNTPServer::SetFrontend(Frontend *f) { m_frontend.reset(f); }
+
+std::string NNTPServer::InstanceName() const { return m_servername; }
+
+void NNTPServer::OnAcceptError(int status) { std::cerr << "nntpserver::accept() " << uv_strerror(status) << std::endl; }
+
+void NNTPServerConn::SendNextReply()
+{
+  IConnHandler *handler = GetHandler();
+  while (handler->HasNextLine())
+  {
+    auto line = handler->GetNextLine();
+    SendString(line + "\r\n");
+  }
+}
+
+void NNTPServerConn::Greet()
+{
+  IConnHandler *handler = GetHandler();
+  handler->Greet();
+  SendNextReply();
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/sanitize.cpp

@@ -0,0 +1,45 @@
+#include <algorithm>
+#include <cctype>
+#include <nntpchan/sanitize.hpp>
+#include <regex>
+
+namespace nntpchan
+{
+
+std::string NNTPSanitizeLine(const std::string &str)
+{
+  if (str == ".")
+    return " .";
+  std::string sane;
+  sane += str;
+  const char ch = ' ';
+  std::replace_if(sane.begin(), sane.end(), [](unsigned char ch) -> bool { return iscntrl(ch); }, ch);
+  return sane;
+}
+
+std::string ToLower(const std::string &str)
+{
+  std::string lower = str;
+  std::transform(lower.begin(), lower.end(), lower.begin(),
+                 [](unsigned char ch) -> unsigned char { return std::tolower(ch); });
+  return lower;
+}
+
+static const std::regex re_ValidMessageID("^<[a-zA-Z0-9$\\._]{2,128}@[a-zA-Z0-9\\-\\.]{2,63}>$");
+
+bool IsValidMessageID(const std::string &msgid) { return std::regex_search(msgid, re_ValidMessageID) == 1; }
+
+static const std::regex re_ValidNewsgroup("^[a-zA-Z][a-zA-Z0-9.]{1,128}$");
+
+bool IsValidNewsgroup(const std::string &msgid) { return std::regex_search(msgid, re_ValidNewsgroup) == 1; }
+
+std::string StripWhitespaces(const std::string &str)
+{
+  std::string stripped;
+  for (const auto &ch : str)
+    if (!(std::isspace(ch) || std::iscntrl(ch)))
+      stripped += ch;
+
+  return stripped;
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/server.cpp

@@ -0,0 +1,142 @@
+#include <cassert>
+#include <iostream>
+#include <nntpchan/buffer.hpp>
+#include <nntpchan/net.hpp>
+#include <nntpchan/server.hpp>
+
+namespace nntpchan
+{
+Server::Server(uv_loop_t *loop)
+{
+  m_loop = loop;
+  uv_tcp_init(m_loop, &m_server);
+  m_server.data = this;
+}
+
+void Server::Close()
+{
+  std::cout << "Close server" << std::endl;
+  uv_close((uv_handle_t *)&m_server, [](uv_handle_t *s) {
+    Server *self = (Server *)s->data;
+    if (self)
+      delete self;
+    s->data = nullptr;
+  });
+}
+
+void Server::Bind(const std::string &addr)
+{
+  auto saddr = ParseAddr(addr);
+  assert(uv_tcp_bind(*this, saddr, 0) == 0);
+  auto cb = [](uv_stream_t *s, int status) {
+    Server *self = (Server *)s->data;
+    self->OnAccept(s, status);
+  };
+  assert(uv_listen(*this, 5, cb) == 0);
+}
+
+void Server::OnAccept(uv_stream_t *s, int status)
+{
+  if (status < 0)
+  {
+    OnAcceptError(status);
+    return;
+  }
+  IServerConn *conn = CreateConn(s);
+  assert(conn);
+  m_conns.push_back(conn);
+  conn->Greet();
+}
+
+void Server::RemoveConn(IServerConn *conn)
+{
+  auto itr = m_conns.begin();
+  while (itr != m_conns.end())
+  {
+    if (*itr == conn)
+      itr = m_conns.erase(itr);
+    else
+      ++itr;
+  }
+}
+
+void IConnHandler::QueueLine(const std::string &line) { m_sendlines.push_back(line); }
+
+bool IConnHandler::HasNextLine() { return m_sendlines.size() > 0; }
+
+std::string IConnHandler::GetNextLine()
+{
+  std::string line = m_sendlines[0];
+  m_sendlines.pop_front();
+  return line;
+}
+
+IServerConn::IServerConn(uv_loop_t *l, uv_stream_t *st, Server *parent, IConnHandler *h)
+{
+  m_loop = l;
+  m_parent = parent;
+  m_handler = h;
+  uv_tcp_init(l, &m_conn);
+  m_conn.data = this;
+  uv_accept(st, (uv_stream_t *)&m_conn);
+  uv_read_start((uv_stream_t *)&m_conn,
+                [](uv_handle_t *h, size_t s, uv_buf_t *b) {
+                  IServerConn *self = (IServerConn *)h->data;
+                  if (self == nullptr)
+                    return;
+                  b->base = new char[s];
+                },
+                [](uv_stream_t *s, ssize_t nread, const uv_buf_t *b) {
+                  IServerConn *self = (IServerConn *)s->data;
+                  if (self == nullptr)
+                  {
+                    if (b->base)
+                      delete[] b->base;
+                    return;
+                  }
+                  if (nread > 0)
+                  {
+                    self->m_handler->OnData(b->base, nread);
+                    self->SendNextReply();
+                    if (self->m_handler->ShouldClose())
+                      self->Close();
+                    delete[] b->base;
+                  }
+                  else
+                  {
+                    if (nread != UV_EOF)
+                    {
+                      std::cerr << "error in nntp server conn alloc: ";
+                      std::cerr << uv_strerror(nread);
+                      std::cerr << std::endl;
+                    }
+                    // got eof or error
+                    self->Close();
+                  }
+                });
+}
+
+IServerConn::~IServerConn() { delete m_handler; }
+
+void IServerConn::SendString(const std::string &str)
+{
+  WriteBuffer *b = new WriteBuffer(str);
+  uv_write(&b->w, (uv_stream_t *)&m_conn, &b->b, 1, [](uv_write_t *w, int status) {
+    (void)status;
+    WriteBuffer *wb = (WriteBuffer *)w->data;
+    if (wb)
+      delete wb;
+  });
+}
+
+void IServerConn::Close()
+{
+  m_parent->RemoveConn(this);
+  uv_close((uv_handle_t *)&m_conn, [](uv_handle_t *s) {
+    IServerConn *self = (IServerConn *)s->data;
+    if (self)
+      delete self;
+    s->data = nullptr;
+  });
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/sha1.cpp

@@ -0,0 +1,314 @@
+/*
+SHA-1 in C
+By Steve Reid <steve@edmweb.com>
+100% Public Domain
+
+Test Vectors (from FIPS PUB 180-1)
+"abc"
+  A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
+"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
+  84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
+A million repetitions of "a"
+  34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
+*/
+
+/* #define LITTLE_ENDIAN * This should be #define'd already, if true. */
+/* #define SHA1HANDSOFF * Copies data before messing with it. */
+
+#include "crypto_old.hpp"
+#include <string>
+
+extern "C" {
+#define SHA1HANDSOFF
+
+#include <stdio.h>
+#include <string.h>
+
+/* for uint32_t */
+#include <stdint.h>
+
+#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
+
+/* blk0() and blk() perform the initial expand. */
+/* I got the idea of expanding during the round function from SSLeay */
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define blk0(i) (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | (rol(block->l[i], 8) & 0x00FF00FF))
+#elif BYTE_ORDER == BIG_ENDIAN
+#define blk0(i) block->l[i]
+#else
+#error "Endianness not defined!"
+#endif
+#define blk(i)                                                                                                         \
+  (block->l[i & 15] =                                                                                                  \
+       rol(block->l[(i + 13) & 15] ^ block->l[(i + 8) & 15] ^ block->l[(i + 2) & 15] ^ block->l[i & 15], 1))
+
+/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
+#define R0(v, w, x, y, z, i)                                                                                           \
+  z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5);                                                         \
+  w = rol(w, 30);
+#define R1(v, w, x, y, z, i)                                                                                           \
+  z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5);                                                          \
+  w = rol(w, 30);
+#define R2(v, w, x, y, z, i)                                                                                           \
+  z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5);                                                                  \
+  w = rol(w, 30);
+#define R3(v, w, x, y, z, i)                                                                                           \
+  z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5);                                                    \
+  w = rol(w, 30);
+#define R4(v, w, x, y, z, i)                                                                                           \
+  z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5);                                                                  \
+  w = rol(w, 30);
+
+/* Hash a single 512-bit block. This is the core of the algorithm. */
+
+void SHA1Transform(uint32_t state[5], const unsigned char buffer[64])
+{
+  uint32_t a, b, c, d, e;
+
+  typedef union {
+    unsigned char c[64];
+    uint32_t l[16];
+  } CHAR64LONG16;
+
+#ifdef SHA1HANDSOFF
+  CHAR64LONG16 block[1]; /* use array to appear as a pointer */
+
+  memcpy(block, buffer, 64);
+#else
+  /* The following had better never be used because it causes the
+   * pointer-to-const buffer to be cast into a pointer to non-const.
+   * And the result is written through.  I threw a "const" in, hoping
+   * this will cause a diagnostic.
+   */
+  CHAR64LONG16 *block = (const CHAR64LONG16 *)buffer;
+#endif
+  /* Copy context->state[] to working vars */
+  a = state[0];
+  b = state[1];
+  c = state[2];
+  d = state[3];
+  e = state[4];
+  /* 4 rounds of 20 operations each. Loop unrolled. */
+  R0(a, b, c, d, e, 0);
+  R0(e, a, b, c, d, 1);
+  R0(d, e, a, b, c, 2);
+  R0(c, d, e, a, b, 3);
+  R0(b, c, d, e, a, 4);
+  R0(a, b, c, d, e, 5);
+  R0(e, a, b, c, d, 6);
+  R0(d, e, a, b, c, 7);
+  R0(c, d, e, a, b, 8);
+  R0(b, c, d, e, a, 9);
+  R0(a, b, c, d, e, 10);
+  R0(e, a, b, c, d, 11);
+  R0(d, e, a, b, c, 12);
+  R0(c, d, e, a, b, 13);
+  R0(b, c, d, e, a, 14);
+  R0(a, b, c, d, e, 15);
+  R1(e, a, b, c, d, 16);
+  R1(d, e, a, b, c, 17);
+  R1(c, d, e, a, b, 18);
+  R1(b, c, d, e, a, 19);
+  R2(a, b, c, d, e, 20);
+  R2(e, a, b, c, d, 21);
+  R2(d, e, a, b, c, 22);
+  R2(c, d, e, a, b, 23);
+  R2(b, c, d, e, a, 24);
+  R2(a, b, c, d, e, 25);
+  R2(e, a, b, c, d, 26);
+  R2(d, e, a, b, c, 27);
+  R2(c, d, e, a, b, 28);
+  R2(b, c, d, e, a, 29);
+  R2(a, b, c, d, e, 30);
+  R2(e, a, b, c, d, 31);
+  R2(d, e, a, b, c, 32);
+  R2(c, d, e, a, b, 33);
+  R2(b, c, d, e, a, 34);
+  R2(a, b, c, d, e, 35);
+  R2(e, a, b, c, d, 36);
+  R2(d, e, a, b, c, 37);
+  R2(c, d, e, a, b, 38);
+  R2(b, c, d, e, a, 39);
+  R3(a, b, c, d, e, 40);
+  R3(e, a, b, c, d, 41);
+  R3(d, e, a, b, c, 42);
+  R3(c, d, e, a, b, 43);
+  R3(b, c, d, e, a, 44);
+  R3(a, b, c, d, e, 45);
+  R3(e, a, b, c, d, 46);
+  R3(d, e, a, b, c, 47);
+  R3(c, d, e, a, b, 48);
+  R3(b, c, d, e, a, 49);
+  R3(a, b, c, d, e, 50);
+  R3(e, a, b, c, d, 51);
+  R3(d, e, a, b, c, 52);
+  R3(c, d, e, a, b, 53);
+  R3(b, c, d, e, a, 54);
+  R3(a, b, c, d, e, 55);
+  R3(e, a, b, c, d, 56);
+  R3(d, e, a, b, c, 57);
+  R3(c, d, e, a, b, 58);
+  R3(b, c, d, e, a, 59);
+  R4(a, b, c, d, e, 60);
+  R4(e, a, b, c, d, 61);
+  R4(d, e, a, b, c, 62);
+  R4(c, d, e, a, b, 63);
+  R4(b, c, d, e, a, 64);
+  R4(a, b, c, d, e, 65);
+  R4(e, a, b, c, d, 66);
+  R4(d, e, a, b, c, 67);
+  R4(c, d, e, a, b, 68);
+  R4(b, c, d, e, a, 69);
+  R4(a, b, c, d, e, 70);
+  R4(e, a, b, c, d, 71);
+  R4(d, e, a, b, c, 72);
+  R4(c, d, e, a, b, 73);
+  R4(b, c, d, e, a, 74);
+  R4(a, b, c, d, e, 75);
+  R4(e, a, b, c, d, 76);
+  R4(d, e, a, b, c, 77);
+  R4(c, d, e, a, b, 78);
+  R4(b, c, d, e, a, 79);
+  /* Add the working vars back into context.state[] */
+  state[0] += a;
+  state[1] += b;
+  state[2] += c;
+  state[3] += d;
+  state[4] += e;
+  /* Wipe variables */
+  a = b = c = d = e = 0;
+#ifdef SHA1HANDSOFF
+  memset(block, '\0', sizeof(block));
+#endif
+}
+
+/* SHA1Init - Initialize new context */
+
+void SHA1Init(SHA1_CTX *context)
+{
+  /* SHA1 initialization constants */
+  context->state[0] = 0x67452301;
+  context->state[1] = 0xEFCDAB89;
+  context->state[2] = 0x98BADCFE;
+  context->state[3] = 0x10325476;
+  context->state[4] = 0xC3D2E1F0;
+  context->count[0] = context->count[1] = 0;
+}
+
+/* Run your data through this. */
+
+void SHA1Update(SHA1_CTX *context, const unsigned char *data, uint32_t len)
+{
+  uint32_t i;
+
+  uint32_t j;
+
+  j = context->count[0];
+  if ((context->count[0] += len << 3) < j)
+    context->count[1]++;
+  context->count[1] += (len >> 29);
+  j = (j >> 3) & 63;
+  if ((j + len) > 63)
+  {
+    memcpy(&context->buffer[j], data, (i = 64 - j));
+    SHA1Transform(context->state, context->buffer);
+    for (; i + 63 < len; i += 64)
+    {
+      SHA1Transform(context->state, &data[i]);
+    }
+    j = 0;
+  }
+  else
+    i = 0;
+  memcpy(&context->buffer[j], &data[i], len - i);
+}
+
+/* Add padding and return the message digest. */
+
+void SHA1Final(unsigned char digest[20], SHA1_CTX *context)
+{
+  unsigned i;
+
+  unsigned char finalcount[8];
+
+  unsigned char c;
+
+#if 0 /* untested "improvement" by DHR */
+    /* Convert context->count to a sequence of bytes
+     * in finalcount.  Second element first, but
+     * big-endian order within element.
+     * But we do it all backwards.
+     */
+    unsigned char *fcp = &finalcount[8];
+
+    for (i = 0; i < 2; i++)
+    {
+        uint32_t t = context->count[i];
+
+        int j;
+
+        for (j = 0; j < 4; t >>= 8, j++)
+            *--fcp = (unsigned char) t}
+#else
+  for (i = 0; i < 8; i++)
+  {
+    finalcount[i] =
+        (unsigned char)((context->count[(i >= 4 ? 0 : 1)] >> ((3 - (i & 3)) * 8)) & 255); /* Endian independent */
+  }
+#endif
+  c = 0200;
+  SHA1Update(context, &c, 1);
+  while ((context->count[0] & 504) != 448)
+  {
+    c = 0000;
+    SHA1Update(context, &c, 1);
+  }
+  SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */
+  for (i = 0; i < 20; i++)
+  {
+    digest[i] = (unsigned char)((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
+  }
+  /* Wipe variables */
+  memset(context, '\0', sizeof(*context));
+  memset(&finalcount, '\0', sizeof(finalcount));
+}
+
+void sha1(uint8_t *hash_out, const uint8_t *str, size_t len)
+{
+  SHA1_CTX ctx;
+  size_t ii;
+
+  SHA1Init(&ctx);
+  for (ii = 0; ii < len; ii += 1)
+    SHA1Update(&ctx, str + ii, 1);
+  SHA1Final(hash_out, &ctx);
+}
+}
+
+namespace nntpchan
+{
+
+static inline char nibble_to_char(uint8_t n)
+{
+  if (n >= 10)
+    return n + 87;
+  else
+    return n + 48;
+}
+
+std::string sha1_hex(const std::string &data)
+{
+  uint8_t digest[20];
+  const uint8_t *ptr = (uint8_t *)data.c_str();
+  sha1(digest, ptr, data.size());
+  std::string out;
+  std::size_t idx = 0;
+  while (idx < 20)
+  {
+    out += nibble_to_char((digest[idx] & 0xf0) >> 8) + nibble_to_char(digest[idx] & 0x0f);
+    ++idx;
+  }
+
+  return out;
+}
+}

contrib/backends/nntpchan-daemon/libnntpchan/staticfile_frontend.cpp

@@ -0,0 +1,172 @@
+#include <any>
+#include <iostream>
+#include <nntpchan/file_handle.hpp>
+#include <nntpchan/mime.hpp>
+#include <nntpchan/sanitize.hpp>
+#include <nntpchan/sha1.hpp>
+#include <nntpchan/staticfile_frontend.hpp>
+#include <set>
+#include <sstream>
+
+namespace nntpchan
+{
+
+StaticFileFrontend::StaticFileFrontend(TemplateEngine *tmpl, const std::string &templateDir, const std::string &outDir,
+                                       uint32_t pages)
+    : m_TemplateEngine(tmpl), m_TemplateDir(templateDir), m_OutDir(outDir), m_Pages(pages)
+{
+}
+
+void StaticFileFrontend::ProcessNewMessage(const fs::path &fpath)
+{
+  std::clog << "process message " << fpath << std::endl;
+  auto file = OpenFile(fpath, eRead);
+  if (file)
+  {
+    // read header
+    RawHeader header;
+    if (!ReadHeader(file, header))
+    {
+      std::clog << "failed to read mime header" << std::endl;
+      return;
+    }
+
+    // read body
+
+    auto findMsgidFunc = [](const std::pair<std::string, std::string> &item) -> bool {
+      auto lower = ToLower(item.first);
+      return (lower == "message-id") || (lower == "messageid");
+    };
+
+    auto msgid_itr = std::find_if(header.begin(), header.end(), findMsgidFunc);
+    if (msgid_itr == std::end(header))
+    {
+      std::clog << "no message id for file " << fpath << std::endl;
+      return;
+    }
+
+    std::string msgid = StripWhitespaces(msgid_itr->second);
+
+    if (!IsValidMessageID(msgid))
+    {
+      std::clog << "invalid message-id: " << msgid << std::endl;
+      return;
+    }
+
+    std::string rootmsgid;
+
+    auto findReferences = [](const std::pair<std::string, std::string> &item) -> bool {
+      auto lower = ToLower(item.first);
+      return lower == "references";
+    };
+
+    auto references_itr = std::find_if(header.begin(), header.end(), findReferences);
+    if (references_itr == std::end(header) || StripWhitespaces(references_itr->second).size() == 0)
+    {
+      rootmsgid = msgid;
+    }
+    else
+    {
+      const auto &s = references_itr->second;
+      auto checkfunc = [](unsigned char ch) -> bool { return std::isspace(ch) || std::iscntrl(ch); };
+      if (std::count_if(s.begin(), s.end(), checkfunc))
+      {
+        /** split off first element */
+        auto idx = std::find_if(s.begin(), s.end(), checkfunc);
+        rootmsgid = s.substr(0, s.find(*idx));
+      }
+      else
+      {
+        rootmsgid = references_itr->second;
+      }
+    }
+
+    std::string rootmsgid_hash = sha1_hex(rootmsgid);
+
+    std::set<std::string> newsgroups_list;
+
+    auto findNewsgroupsFunc = [](const std::pair<std::string, std::string> &item) -> bool {
+      return ToLower(item.first) == "newsgroups";
+    };
+
+    auto group = std::find_if(header.begin(), header.end(), findNewsgroupsFunc);
+    if (group == std::end(header))
+    {
+      std::clog << "no newsgroups header" << std::endl;
+      return;
+    }
+    std::istringstream input(group->second);
+
+    std::string newsgroup;
+    while (std::getline(input, newsgroup, ' '))
+    {
+      if (IsValidNewsgroup(newsgroup))
+        newsgroups_list.insert(newsgroup);
+    }
+
+    fs::path threadFilePath = m_OutDir / fs::path("thread-" + rootmsgid_hash + ".html");
+    nntpchan::model::Thread thread;
+
+    if (!m_MessageDB)
+    {
+      std::clog << "no message database" << std::endl;
+      return;
+    }
+
+    if (!m_MessageDB->LoadThread(thread, rootmsgid))
+    {
+      std::clog << "cannot find thread with root " << rootmsgid << std::endl;
+      return;
+    }
+    TemplateEngine::Args_t thread_args;
+    thread_args["posts"] = thread;
+    if (m_TemplateEngine)
+    {
+      FileHandle_ptr out = OpenFile(threadFilePath, eWrite);
+      if (!out || !m_TemplateEngine->WriteTemplate("thread.mustache", thread_args, out))
+      {
+        std::clog << "failed to write " << threadFilePath << std::endl;
+        return;
+      }
+    }
+    nntpchan::model::BoardPage page;
+    for (const auto &name : newsgroups_list)
+    {
+      uint32_t pageno = 0;
+      while (pageno < m_Pages)
+      {
+        page.clear();
+        if (!m_MessageDB->LoadBoardPage(page, name, 10, m_Pages))
+        {
+          std::clog << "cannot load board page " << pageno << " for " << name << std::endl;
+          break;
+        }
+        TemplateEngine::Args_t page_args;
+        page_args["group"] = name;
+        page_args["threads"] = page;
+        page_args["pageno"] = std::to_string(pageno);
+        if (pageno)
+          page_args["prev_pageno"] = std::to_string(pageno - 1);
+        if (pageno + 1 < m_Pages)
+          page_args["next_pageno"] = std::to_string(pageno + 1);
+        fs::path boardPageFilename(name + "-" + std::to_string(pageno) + ".html");
+        if (m_TemplateEngine)
+        {
+          fs::path outfile = m_OutDir / boardPageFilename;
+          FileHandle_ptr out = OpenFile(outfile, eWrite);
+          if (out)
+            m_TemplateEngine->WriteTemplate("board.mustache", page_args, out);
+          else
+            std::clog << "failed to open board page " << outfile << std::endl;
+        }
+
+        ++pageno;
+      }
+    }
+  }
+}
+
+bool StaticFileFrontend::AcceptsNewsgroup(const std::string &newsgroup) { return IsValidNewsgroup(newsgroup); }
+
+bool StaticFileFrontend::AcceptsMessage(const std::string &msgid) { return IsValidMessageID(msgid); }
+}

contrib/backends/nntpchan-daemon/libnntpchan/storage.cpp

@@ -0,0 +1,94 @@
+#include <cassert>
+#include <nntpchan/crypto.hpp>
+#include <nntpchan/sanitize.hpp>
+#include <nntpchan/storage.hpp>
+#include <sstream>
+
+namespace nntpchan
+{
+
+  const fs::path posts_skiplist_dir = "posts";
+  const fs::path threads_skiplist_dir = "threads";
+  
+ArticleStorage::ArticleStorage(const fs::path &fpath) { SetPath(fpath); }
+
+ArticleStorage::~ArticleStorage() {}
+
+void ArticleStorage::SetPath(const fs::path &fpath)
+{
+  basedir = fpath;
+  fs::create_directories(basedir);
+  assert(init_skiplist(posts_skiplist_dir));
+  assert(init_skiplist(threads_skiplist_dir));
+}
+
+
+bool ArticleStorage::init_skiplist(const std::string &subdir) const
+{
+  fs::path skiplist = skiplist_root(subdir);
+  const auto subdirs = {		'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
+		'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
+		'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
+		'y', 'z', '2', '3', '4', '5', '6', '7',
+};
+  for (const auto &s : subdirs)
+    fs::create_directories(skiplist / std::string(&s, 1));
+  return true;
+}
+
+bool ArticleStorage::Accept(const std::string &msgid) const
+{
+  if (!IsValidMessageID(msgid))
+    return false;
+  auto p = MessagePath(msgid);
+  return !fs::exists(p);
+}
+
+fs::path ArticleStorage::MessagePath(const std::string &msgid) const { return basedir / msgid; }
+
+FileHandle_ptr ArticleStorage::OpenRead(const std::string &msgid) const { return OpenFile(MessagePath(msgid), eRead); }
+
+FileHandle_ptr ArticleStorage::OpenWrite(const std::string &msgid) const
+{
+  return OpenFile(MessagePath(msgid), eWrite);
+}
+
+bool ArticleStorage::LoadBoardPage(BoardPage &board, const std::string &newsgroup, uint32_t perpage,
+                                   uint32_t page) const
+{
+  (void)board;
+  (void)newsgroup;
+  (void)perpage;
+  (void)page;
+  return false;
+}
+bool ArticleStorage::FindThreadByHash(const std::string &hashhex, std::string &msgid) const
+{
+  (void)hashhex;
+  (void)msgid;
+  return false;
+}
+bool ArticleStorage::LoadThread(Thread &thread, const std::string &rootmsgid) const
+{
+  (void)thread;
+  (void)rootmsgid;
+  return false;
+}
+
+/** ensure symlinks are formed for this article by message id */
+void ArticleStorage::EnsureSymlinks(const std::string &msgid) const
+{
+  std::string msgidhash = Blake2B_base32(msgid);
+  skiplist_dir(posts_skiplist_dir, msgidhash);
+}
+
+
+  fs::path ArticleStorage::skiplist_root(const std::string & name ) const
+  {
+    return basedir / name;
+  }
+  fs::path ArticleStorage::skiplist_dir(const fs::path & root, const std::string & name ) const
+  {
+    return root / name.substr(0, 1) ;
+  }
+}

contrib/backends/nntpchan-daemon/libnntpchan/template_engine.cpp

@@ -0,0 +1,166 @@
+#include <iostream>
+#include <mstch/mstch.hpp>
+#include <nntpchan/sanitize.hpp>
+#include <nntpchan/template_engine.hpp>
+#include <sstream>
+
+namespace nntpchan
+{
+
+template <class... Ts> struct overloaded : Ts...
+{
+  using Ts::operator()...;
+};
+template <class... Ts> overloaded(Ts...)->overloaded<Ts...>;
+
+namespace mustache = mstch;
+
+static mustache::map post_to_map(const nntpchan::model::Post &post)
+{
+  mustache::map m;
+  mustache::array attachments;
+  mustache::map h;
+
+  for (const auto &att : nntpchan::model::GetAttachments(post))
+  {
+    mustache::map a;
+    a["filename"] = nntpchan::model::GetFilename(att);
+    a["hexdigest"] = nntpchan::model::GetHexDigest(att);
+    a["thumbnail"] = nntpchan::model::GetThumbnail(att);
+    attachments.push_back(a);
+  }
+
+  for (const auto &item : nntpchan::model::GetHeader(post))
+  {
+    mustache::array vals;
+    for (const auto &v : item.second)
+      vals.push_back(v);
+    h[item.first] = vals;
+  }
+
+  m["attachments"] = attachments;
+  m["message"] = nntpchan::model::GetBody(post);
+  m["header"] = h;
+  return m;
+}
+
+static mustache::map thread_to_map(const nntpchan::model::Thread &t)
+{
+  mustache::map thread;
+  mustache::array posts;
+  for (const auto &post : t)
+  {
+    posts.push_back(post_to_map(post));
+  }
+  auto &opHeader = nntpchan::model::GetHeader(t[0]);
+  thread["title"] = nntpchan::model::HeaderIFind(opHeader, "subject", "None")[0];
+  thread["posts"] = posts;
+  return thread;
+}
+
+struct MustacheTemplateEngine : public TemplateEngine
+{
+  struct Impl
+  {
+
+    Impl(const std::map<std::string, std::string> &partials) : m_partials(partials) {}
+
+    bool ParseTemplate(const FileHandle_ptr &in)
+    {
+      std::stringstream str;
+      std::string line;
+      while (std::getline(*in, line))
+        str << line << "\n";
+      m_tmplString = str.str();
+      return in->eof();
+    }
+
+    bool RenderFile(const Args_t &args, const FileHandle_ptr &out)
+    {
+      mustache::map obj;
+      for (const auto &item : args)
+      {
+        std::visit(overloaded{[&obj, item](const nntpchan::model::Model &m) {
+                                std::visit(overloaded{[&obj, item](const nntpchan::model::BoardPage &p) {
+                                                        mustache::array threads;
+                                                        for (const auto &thread : p)
+                                                        {
+                                                          threads.push_back(thread_to_map(thread));
+                                                        }
+                                                        obj[item.first] = threads;
+                                                      },
+                                                      [&obj, item](const nntpchan::model::Thread &t) {
+                                                        obj[item.first] = thread_to_map(t);
+                                                      }},
+                                           m);
+                              },
+                              [&obj, item](const std::string &str) { obj[item.first] = str; }},
+                   item.second);
+      }
+
+      std::string str = mustache::render(m_tmplString, obj);
+      out->write(str.c_str(), str.size());
+      out->flush();
+      return !out->fail();
+    }
+
+    std::string m_tmplString;
+    const std::map<std::string, std::string> &m_partials;
+  };
+
+  virtual bool WriteTemplate(const fs::path &fpath, const Args_t &args, const FileHandle_ptr &out)
+  {
+    auto templFile = OpenFile(fpath, eRead);
+    if (!templFile)
+    {
+      std::clog << "no such template at " << fpath << std::endl;
+      return false;
+    }
+
+    std::map<std::string, std::string> partials;
+    if (!LoadPartials(fpath.parent_path(), partials))
+    {
+      std::clog << "failed to load partials" << std::endl;
+      return false;
+    }
+
+    Impl impl(partials);
+    if (impl.ParseTemplate(templFile))
+    {
+      return impl.RenderFile(args, out);
+    }
+
+    std::clog << "failed to parse template " << fpath << std::endl;
+    return false;
+  }
+
+  bool LoadPartials(fs::path dir, std::map<std::string, std::string> &partials)
+  {
+    const auto partial_files = {"header", "footer"};
+    for (const auto &fname : partial_files)
+    {
+      auto file = OpenFile(dir / fs::path(fname + std::string(".html")), eRead);
+      if (!file)
+      {
+        std::clog << "no such partial: " << fname << std::endl;
+        return false;
+      }
+      std::string line;
+      std::stringstream input;
+      while (std::getline(*file, line))
+        input << line << "\n";
+      partials[fname] = input.str();
+    }
+    return true;
+  }
+};
+
+TemplateEngine *CreateTemplateEngine(const std::string &dialect)
+{
+  auto d = ToLower(dialect);
+  if (d == "mustache")
+    return new MustacheTemplateEngine;
+  else
+    return nullptr;
+}
+}

contrib/backends/nntpchan-daemon/nntpchan.ini

@@ -0,0 +1,7 @@
+[nntp]
+instance_name=nntp.server.tld
+bind=[::]:1199
+authdb=auth.txt
+
+[articles]
+store_path=./storage/

contrib/backends/nntpchan-daemon/test.cpp

@@ -0,0 +1,14 @@
+#include <cassert>
+#include <iostream>
+#include <nntpchan/exec_frontend.hpp>
+#include <nntpchan/sanitize.hpp>
+
+int main(int, char *[])
+{
+  nntpchan::Frontend_ptr f(new nntpchan::ExecFrontend("./contrib/nntpchan.sh"));
+  assert(f->AcceptsMessage("<test@server>"));
+  assert(f->AcceptsNewsgroup("overchan.test"));
+  assert(nntpchan::IsValidMessageID("<test@test>"));
+  assert(!nntpchan::IsValidMessageID("asd"));
+  std::cout << "all good" << std::endl;
+}

contrib/backends/nntpchan-daemon/tools/authtool.cpp

@@ -0,0 +1,101 @@
+#include "base64.hpp"
+#include "crypto.hpp"
+
+#include <cassert>
+#include <cstring>
+#include <iostream>
+#include <sodium.h>
+#include <string>
+
+static void print_help(const std::string &exename)
+{
+  std::cout << "usage: " << exename << " [help|gen|check]" << std::endl;
+}
+
+static void print_long_help() {}
+
+static void gen_passwd(const std::string &username, const std::string &passwd)
+{
+  std::array<uint8_t, 8> random;
+  randombytes_buf(random.data(), random.size());
+  std::string salt = nntpchan::B64Encode(random.data(), random.size());
+  std::string cred = passwd + salt;
+  nntpchan::SHA512Digest d;
+  nntpchan::SHA512((const uint8_t *)cred.c_str(), cred.size(), d);
+  std::string hash = nntpchan::B64Encode(d.data(), d.size());
+  std::cout << username << ":" << hash << ":" << salt << std::endl;
+}
+
+static bool check_cred(const std::string &cred, const std::string &passwd)
+{
+  auto idx = cred.find(":");
+  if (idx == std::string::npos || idx == 0)
+    return false;
+  std::string part = cred.substr(idx + 1);
+  idx = part.find(":");
+  if (idx == std::string::npos || idx == 0)
+    return false;
+  std::string salt = part.substr(idx + 1);
+  std::string hash = part.substr(0, idx);
+  std::vector<uint8_t> h;
+  if (!nntpchan::B64Decode(hash, h))
+    return false;
+  nntpchan::SHA512Digest d;
+  std::string l = passwd + salt;
+  nntpchan::SHA512((const uint8_t *)l.data(), l.size(), d);
+  return std::memcmp(h.data(), d.data(), d.size()) == 0;
+}
+
+int main(int argc, char *argv[])
+{
+  assert(sodium_init() == 0);
+  if (argc == 1)
+  {
+    print_help(argv[0]);
+    return 1;
+  }
+  std::string cmd(argv[1]);
+  if (cmd == "help")
+  {
+    print_long_help();
+    return 0;
+  }
+  if (cmd == "gen")
+  {
+    if (argc == 4)
+    {
+      gen_passwd(argv[2], argv[3]);
+      return 0;
+    }
+    else
+    {
+      std::cout << "usage: " << argv[0] << " gen username password" << std::endl;
+      return 1;
+    }
+  }
+  if (cmd == "check")
+  {
+    std::string cred;
+    std::cout << "credential: ";
+    if (!std::getline(std::cin, cred))
+    {
+      return 1;
+    }
+    std::string passwd;
+    std::cout << "password: ";
+    if (!std::getline(std::cin, passwd))
+    {
+      return 1;
+    }
+    if (check_cred(cred, passwd))
+    {
+      std::cout << "okay" << std::endl;
+      return 0;
+    }
+    std::cout << "bad login" << std::endl;
+    return 1;
+  }
+
+  print_help(argv[0]);
+  return 1;
+}

contrib/backends/nntpchan-daemon/tools/testtool.cpp

@@ -0,0 +1,12 @@
+#include <cassert>
+#include <iostream>
+#include <nntpchan/exec_frontend.hpp>
+#include <nntpchan/sanitize.hpp>
+
+int main(int, char *[])
+{
+  nntpchan::Frontend_ptr f(new nntpchan::ExecFrontend("./contrib/nntpchan.sh"));
+  assert(nntpchan::IsValidMessageID("<a28a71493831188@web.oniichan.onion>"));
+  assert(f->AcceptsNewsgroup("overchan.test"));
+  std::cout << "all good" << std::endl;
+}

contrib/backends/nntpchand/.dir-locals.el

@@ -0,0 +1,8 @@
+;; thanks stack overflow
+;; https://stackoverflow.com/questions/4012321/how-can-i-access-the-path-to-the-current-directory-in-an-emacs-directory-variabl
+((nil . ((eval . (set (make-local-variable 'my-project-path)
+                      (file-name-directory
+                       (let ((d (dir-locals-find-file ".")))
+                         (if (stringp d) d (car d))))))
+         (eval . (setenv "GOPATH" my-project-path))
+         (eval . (message "Project directory set to `%s'." my-project-path)))))

contrib/backends/nntpchand/.gitignore

@@ -0,0 +1 @@
+nntpchand

contrib/backends/nntpchand/Makefile

@@ -0,0 +1,14 @@
+REPO=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
+
+all: clean build
+
+build: nntpchand
+
+nntpchand:
+	GOROOT=$(GOROOT) GOPATH=$(REPO) go build -v
+
+test:
+	GOROOT=$(GOROOT) GOPATH=$(REPO) go test ./...
+
+clean:
+	GOPATH=$(REPO) go clean -v

contrib/backends/nntpchand/files/templates/overchan/error.html.tmpl

@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+
+  <head>
+    <title> Error </title>
+  </head>
+
+  <body>
+    <pre> {{ .Error}} </pre>
+  </body>
+</html>

contrib/backends/nntpchand/files/templates/overchan/index.html.tmpl

@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+
+  <head>
+    <title> Overchan </title>
+  </head>
+
+  <body>
+    <pre>ebin</pre>
+  </body>
+</html>

contrib/backends/nntpchand/main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"nntpchan/cmd/nntpchan"
+)
+
+func main() {
+	nntpchan.Main()
+}

contrib/backends/nntpchand/src/nntpchan/cmd/nntpchan/main.go

@@ -0,0 +1,175 @@
+package nntpchan
+
+import (
+	log "github.com/Sirupsen/logrus"
+	"net"
+	_ "net/http/pprof"
+	"nntpchan/lib/config"
+	"nntpchan/lib/database"
+	"nntpchan/lib/frontend"
+	"nntpchan/lib/nntp"
+	"nntpchan/lib/store"
+	"nntpchan/lib/webhooks"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+type runStatus struct {
+	nntpListener net.Listener
+	run          bool
+	done         chan error
+}
+
+func (st *runStatus) Stop() {
+	st.run = false
+	if st.nntpListener != nil {
+		st.nntpListener.Close()
+	}
+	st.nntpListener = nil
+	log.Info("stopping daemon process")
+}
+
+func Main() {
+	st := &runStatus{
+		run:  true,
+		done: make(chan error),
+	}
+	log.Info("starting up nntpchan...")
+	cfgFname := "nntpchan.json"
+	conf, err := config.Ensure(cfgFname)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if conf.Log == "debug" {
+		log.SetLevel(log.DebugLevel)
+	}
+
+	sconfig := conf.Store
+
+	if sconfig == nil {
+		log.Fatal("no article storage configured")
+	}
+
+	nconfig := conf.NNTP
+
+	if nconfig == nil {
+		log.Fatal("no nntp server configured")
+	}
+
+	dconfig := conf.Database
+
+	if dconfig == nil {
+		log.Fatal("no database configured")
+	}
+
+	// create nntp server
+	nserv := nntp.NewServer()
+	nserv.Config = nconfig
+	nserv.Feeds = conf.Feeds
+
+	if nconfig.LoginsFile != "" {
+		nserv.Auth = nntp.FlatfileAuth(nconfig.LoginsFile)
+	}
+
+	// create article storage
+	nserv.Storage, err = store.NewFilesytemStorage(sconfig.Path, true)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if conf.WebHooks != nil && len(conf.WebHooks) > 0 {
+		// put webhooks into nntp server event hooks
+		nserv.Hooks = webhooks.NewWebhooks(conf.WebHooks, nserv.Storage)
+	}
+
+	if conf.NNTPHooks != nil && len(conf.NNTPHooks) > 0 {
+		var hooks nntp.MulitHook
+		if nserv.Hooks != nil {
+			hooks = append(hooks, nserv.Hooks)
+		}
+		for _, h := range conf.NNTPHooks {
+			hooks = append(hooks, nntp.NewHook(h))
+		}
+		nserv.Hooks = hooks
+	}
+	var frontends []frontend.Frontend
+	var db database.Database
+	for _, fconf := range conf.Frontends {
+		var f frontend.Frontend
+		f, err = frontend.NewHTTPFrontend(&fconf, db, nserv.Storage)
+		if err == nil {
+			log.Infof("serving frontend %s", f.Name())
+			go f.Serve()
+			frontends = append(frontends, f)
+		} else {
+			log.Fatalf("failed to set up frontend %s: %s", fconf.Name(), err.Error())
+		}
+	}
+
+	// start persisting feeds
+	go nserv.PersistFeeds()
+
+	// handle signals
+	sigchnl := make(chan os.Signal, 1)
+	signal.Notify(sigchnl, syscall.SIGHUP, os.Interrupt)
+	go func() {
+		for {
+			s := <-sigchnl
+			if s == syscall.SIGHUP {
+				// handle SIGHUP
+				conf, err := config.Ensure(cfgFname)
+				if err == nil {
+					log.Infof("reloading config: %s", cfgFname)
+					nserv.ReloadServer(conf.NNTP)
+					nserv.ReloadFeeds(conf.Feeds)
+					nserv.ReloadStorage(conf.Store)
+					for idx := range frontends {
+						f := frontends[idx]
+						for i := range conf.Frontends {
+							c := conf.Frontends[i]
+							if c.Name() == f.Name() {
+								// TODO: inject storage config?
+								f.Reload(&c)
+							}
+						}
+					}
+				} else {
+					log.Errorf("failed to reload config: %s", err)
+				}
+			} else if s == os.Interrupt {
+				// handle interrupted, clean close
+				st.Stop()
+				return
+			}
+		}
+	}()
+	go func() {
+		var err error
+		for st.run {
+			var nl net.Listener
+			naddr := conf.NNTP.Bind
+			log.Infof("Bind nntp server to %s", naddr)
+			nl, err = net.Listen("tcp", naddr)
+			if err == nil {
+				st.nntpListener = nl
+				err = nserv.Serve(nl)
+				if err != nil {
+					nl.Close()
+					log.Errorf("nntpserver.serve() %s", err.Error())
+				}
+			} else {
+				log.Errorf("nntp server net.Listen failed: %s", err.Error())
+			}
+			time.Sleep(time.Second)
+		}
+		st.done <- err
+	}()
+	e := <-st.done
+	if e != nil {
+		log.Fatal(e)
+	}
+	log.Info("ended")
+}

contrib/backends/nntpchand/src/nntpchan/cmd/nntpserver/main.go

@@ -0,0 +1,42 @@
+package main
+
+// simple nntp server
+
+import (
+	log "github.com/Sirupsen/logrus"
+	"net"
+	"nntpchan/lib/config"
+	"nntpchan/lib/nntp"
+	"nntpchan/lib/store"
+)
+
+func main() {
+
+	log.Info("starting NNTP server...")
+	conf, err := config.Ensure("settings.json")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if conf.Log == "debug" {
+		log.SetLevel(log.DebugLevel)
+	}
+
+	serv := &nntp.Server{
+		Config: conf.NNTP,
+		Feeds:  conf.Feeds,
+	}
+	serv.Storage, err = store.NewFilesytemStorage(conf.Store.Path, false)
+	if err != nil {
+		log.Fatal(err)
+	}
+	l, err := net.Listen("tcp", conf.NNTP.Bind)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Info("listening on ", l.Addr())
+	err = serv.Serve(l)
+	if err != nil {
+		log.Fatal(err)
+	}
+}

contrib/backends/nntpchand/src/nntpchan/lib/admin/doc.go

@@ -0,0 +1,4 @@
+//
+// server admin panel
+//
+package admin

contrib/backends/nntpchand/src/nntpchan/lib/admin/server.go

@@ -0,0 +1,16 @@
+package admin
+
+import (
+	"net/http"
+)
+
+type Server struct {
+}
+
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+
+}
+
+func NewServer() *Server {
+	return &Server{}
+}

contrib/backends/nntpchand/src/nntpchan/lib/api/api.go

@@ -0,0 +1,10 @@
+package api
+
+import (
+	"nntpchan/lib/model"
+)
+
+// json api
+type API interface {
+	MakePost(p model.Post)
+}

contrib/backends/nntpchand/src/nntpchan/lib/api/doc.go

@@ -0,0 +1,2 @@
+// json api
+package api

contrib/backends/nntpchand/src/nntpchan/lib/api/server.go

@@ -0,0 +1,20 @@
+package api
+
+import (
+	"github.com/gorilla/mux"
+	"net/http"
+)
+
+// api server
+type Server struct {
+}
+
+func (s *Server) HandlePing(w http.ResponseWriter, r *http.Request) {
+
+}
+
+// inject api routes
+func (s *Server) SetupRoutes(r *mux.Router) {
+	// setup api pinger
+	r.Path("/ping").HandlerFunc(s.HandlePing)
+}

contrib/backends/nntpchand/src/nntpchan/lib/config/article.go

@@ -0,0 +1,73 @@
+package config
+
+import "regexp"
+
+// configration for local article policies
+type ArticleConfig struct {
+	// explicitly allow these newsgroups (regexp)
+	AllowGroups []string `json:"whitelist"`
+	// explicitly disallow these newsgroups (regexp)
+	DisallowGroups []string `json:"blacklist"`
+	// only allow explicitly allowed groups
+	ForceWhitelist bool `json:"force-whitelist"`
+	// allow anonymous posts?
+	AllowAnon bool `json:"anon"`
+	// allow attachments?
+	AllowAttachments bool `json:"attachments"`
+	// allow anonymous attachments?
+	AllowAnonAttachments bool `json:"anon-attachments"`
+}
+
+func (c *ArticleConfig) AllowGroup(group string) bool {
+
+	for _, g := range c.DisallowGroups {
+		r := regexp.MustCompile(g)
+		if r.MatchString(group) && c.ForceWhitelist {
+			// disallowed
+			return false
+		}
+	}
+
+	// check allowed groups first
+	for _, g := range c.AllowGroups {
+		r := regexp.MustCompile(g)
+		if r.MatchString(g) {
+			return true
+		}
+	}
+
+	return !c.ForceWhitelist
+}
+
+// allow an article?
+func (c *ArticleConfig) Allow(msgid, group string, anon, attachment bool) bool {
+
+	// check attachment policy
+	if c.AllowGroup(group) {
+		allow := true
+		// no anon ?
+		if anon && !c.AllowAnon {
+			allow = false
+		}
+		// no attachments ?
+		if allow && attachment && !c.AllowAttachments {
+			allow = false
+		}
+		// no anon attachments ?
+		if allow && attachment && anon && !c.AllowAnonAttachments {
+			allow = false
+		}
+		return allow
+	} else {
+		return false
+	}
+}
+
+var DefaultArticlePolicy = ArticleConfig{
+	AllowGroups:          []string{"ctl", "overchan.test"},
+	DisallowGroups:       []string{"overchan.cp"},
+	ForceWhitelist:       false,
+	AllowAnon:            true,
+	AllowAttachments:     true,
+	AllowAnonAttachments: false,
+}

contrib/backends/nntpchand/src/nntpchan/lib/config/cache.go

@@ -0,0 +1,13 @@
+package config
+
+// caching interface configuration
+type CacheConfig struct {
+	// backend cache driver name
+	Backend string `json:"backend"`
+	// address for cache
+	Addr string `json:"addr"`
+	// username for login
+	User string `json:"user"`
+	// password for login
+	Password string `json:"password"`
+}

contrib/backends/nntpchand/src/nntpchan/lib/config/config.go

@@ -0,0 +1,87 @@
+package config
+
+import (
+	"bytes"
+	"encoding/json"
+	"io/ioutil"
+	"os"
+)
+
+// main configuration
+type Config struct {
+	// nntp server configuration
+	NNTP *NNTPServerConfig `json:"nntp"`
+	// log level
+	Log string `json:"log"`
+	// article storage config
+	Store *StoreConfig `json:"storage"`
+	// web hooks to call
+	WebHooks []*WebhookConfig `json:"webhooks"`
+	// external scripts to call
+	NNTPHooks []*NNTPHookConfig `json:"nntphooks"`
+	// database backend configuration
+	Database *DatabaseConfig `json:"db"`
+	// list of feeds to add on runtime
+	Feeds []*FeedConfig `json:"feeds"`
+	// frontend config
+	Frontends []FrontendConfig `json:"frontends"`
+	// unexported fields ...
+
+	// absolute filepath to configuration
+	fpath string
+}
+
+// default configuration
+var DefaultConfig = Config{
+	Store:     &DefaultStoreConfig,
+	NNTP:      &DefaultNNTPConfig,
+	Database:  &DefaultDatabaseConfig,
+	WebHooks:  []*WebhookConfig{DefaultWebHookConfig},
+	NNTPHooks: []*NNTPHookConfig{DefaultNNTPHookConfig},
+	Feeds:     DefaultFeeds,
+	Frontends: []FrontendConfig{DefaultFrontendConfig},
+	Log:       "debug",
+}
+
+// reload configuration
+func (c *Config) Reload() (err error) {
+	var b []byte
+	b, err = ioutil.ReadFile(c.fpath)
+	if err == nil {
+		err = json.Unmarshal(b, c)
+	}
+	return
+}
+
+// ensure that a config file exists
+// creates one if it does not exist
+func Ensure(fname string) (cfg *Config, err error) {
+	_, err = os.Stat(fname)
+	if os.IsNotExist(err) {
+		err = nil
+		var d []byte
+		d, err = json.Marshal(&DefaultConfig)
+		if err == nil {
+			b := new(bytes.Buffer)
+			err = json.Indent(b, d, "", "  ")
+			if err == nil {
+				err = ioutil.WriteFile(fname, b.Bytes(), 0600)
+			}
+		}
+	}
+	if err == nil {
+		cfg, err = Load(fname)
+	}
+	return
+}
+
+// load configuration file
+func Load(fname string) (cfg *Config, err error) {
+	cfg = new(Config)
+	cfg.fpath = fname
+	err = cfg.Reload()
+	if err != nil {
+		cfg = nil
+	}
+	return
+}

contrib/backends/nntpchand/src/nntpchan/lib/config/database.go

@@ -0,0 +1,18 @@
+package config
+
+type DatabaseConfig struct {
+	// url or address for database connector
+	Addr string `json:"addr"`
+	// password to use
+	Password string `json:"password"`
+	// username to use
+	Username string `json:"username"`
+	// type of database to use
+	Type string `json:"type"`
+}
+
+var DefaultDatabaseConfig = DatabaseConfig{
+	Type:     "postgres",
+	Addr:     "/var/run/postgresql",
+	Password: "",
+}

contrib/backends/nntpchand/src/nntpchan/lib/config/doc.go

@@ -0,0 +1,4 @@
+//
+// package for parsing config files
+//
+package config

contrib/backends/nntpchand/src/nntpchan/lib/config/feed.go

@@ -0,0 +1,33 @@
+package config
+
+// configuration for 1 nntp feed
+type FeedConfig struct {
+	// feed's policy, filters articles
+	Policy *ArticleConfig `json:"policy"`
+	// remote server's address
+	Addr string `json:"addr"`
+	// proxy server config
+	Proxy *ProxyConfig `json:"proxy"`
+	// nntp username to log in with
+	Username string `json:"username"`
+	// nntp password to use when logging in
+	Password string `json:"password"`
+	// do we want to use tls?
+	TLS bool `json:"tls"`
+	// the name of this feed
+	Name string `json:"name"`
+	// how often to pull articles from the server in minutes
+	// 0 for never
+	PullInterval int `json:"pull"`
+}
+
+var DuummyFeed = FeedConfig{
+	Policy: &DefaultArticlePolicy,
+	Addr:   "nntp.dummy.tld:1119",
+	Proxy:  &DefaultTorProxy,
+	Name:   "dummy",
+}
+
+var DefaultFeeds = []*FeedConfig{
+	&DuummyFeed,
+}