Feature Issue ID 0000602: Redirect must be done by html or http

Redirect it's only done by the html method but must be done too with http method.
Creation of two functions redirect_http and redirect_html.
Function redirect calls one or other functions follow $conf or parameters.

$conf value are true on BSF, in order to check modifications.
Must be set to false on RC.

git-svn-id: http://piwigo.org/svn/trunk@1649 68402e56-0260-453c-a942-63ccdbb3a9ee

include/config_default.inc.php

@@ -240,6 +240,9 @@ $conf['check_upgrade_feed'] = true;
 // rate_items: available rates for a picture
 $conf['rate_items'] = array(0,1,2,3,4,5);
 
+// Define default method to use ('http' or 'html' in order to do redirect)
+$conf['default_redirect_method'] = 'http';
+
 // +-----------------------------------------------------------------------+
 // |                               metadata                                |
 // +-----------------------------------------------------------------------+

include/functions.inc.php

@@ -600,7 +600,28 @@ function pwg_debug( $string )
 }
 
 /**
- * Redirects to the given URL
+ * Redirects to the given URL (HTTP method)
+ *
+ * Note : once this function called, the execution doesn't go further
+ * (presence of an exit() instruction.
+ *
+ * @param string $url
+ * @return void
+ */
+function redirect_http( $url )
+{
+  if (ob_get_length () !== FALSE)
+  {
+    ob_clean();
+  }
+  header('Request-URI: '.$url);
+  header('Content-Location: '.$url);
+  header('Location: '.$url);
+  exit();
+}
+
+/**
+ * Redirects to the given URL (HTML method)
  *
  * Note : once this function called, the execution doesn't go further
  * (presence of an exit() instruction.
@@ -610,7 +631,7 @@ function pwg_debug( $string )
  * @param integer $refreh_time
  * @return void
  */
-function redirect( $url , $msg = '', $refresh_time = 0)
+function redirect_html( $url , $msg = '', $refresh_time = 0)
 {
   global $user, $template, $lang_info, $conf, $lang, $t2, $page, $debug;
 
@@ -652,6 +673,32 @@ function redirect( $url , $msg = '', $refresh_time = 0)
   exit();
 }
 
+/**
+ * Redirects to the given URL (Switch to HTTP method or HTML method)
+ *
+ * Note : once this function called, the execution doesn't go further
+ * (presence of an exit() instruction.
+ *
+ * @param string $url
+ * @param string $title_msg
+ * @param integer $refreh_time
+ * @return void
+ */
+function redirect( $url , $msg = '', $refresh_time = 0)
+{
+  global $conf;
+
+  // with RefeshTime <> 0, only html must be used
+  if (($conf['default_redirect_method'] == 'http') and ($refresh_time == 0))
+  {
+    redirect_http($url);
+  }
+  else
+  {
+    redirect_html($url, $msg, $refresh_time);
+  }
+}
+
 /**
  * returns $_SERVER['QUERY_STRING'] whitout keys given in parameters
  *

include/functions_html.inc.php

@@ -609,7 +609,7 @@ function access_denied()
   else
   {
     set_status_header(401);
-    redirect($login_url);
+    redirect_html($login_url);
   }
 }
 
@@ -623,7 +623,7 @@ function page_not_found($msg, $alternate_url=null)
   set_status_header(404);
   if ($alternate_url==null)
     $alternate_url = make_index_url();
-  redirect( $alternate_url,
+  redirect_html( $alternate_url,
     '<div style="text-align:left; margin-left:5em;margin-bottom:5em;">
 <h1 style="text-align:left; font-size:36px;">Page not found</h1><br/>'
 .$msg.'</div>',