Added: Support for xkcd thumbnails

[github/shaarli/Shaarli.git] / index.php

diff --git a/index.php b/index.php
index e78733bf3e432c000efee23d09f9ade06eb187e6..ba3d9c3485cb3e63f84f009aa54590309d2c1446 100644 (file)
--- a/index.php
+++ b/index.php
@@ -1,5 +1,5 @@
 <?php
-// Shaarli 0.0.32 beta - Shaare your links...
+// Shaarli 0.0.33 beta - Shaare your links...
 // The personal, minimalist, super-fast, no-database delicious clone. By sebsauvage.net
 // http://sebsauvage.net/wiki/doku.php?id=php:shaarli
 // Licence: http://www.opensource.org/licenses/zlib-license.php
@@ -58,7 +58,7 @@ header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 header("Cache-Control: no-store, no-cache, must-revalidate");
 header("Cache-Control: post-check=0, pre-check=0", false);
 header("Pragma: no-cache");
-define('shaarli_version','0.0.32 beta');
+define('shaarli_version','0.0.33 beta');
 if (!is_dir($GLOBALS['config']['DATADIR'])) { mkdir($GLOBALS['config']['DATADIR'],0705); chmod($GLOBALS['config']['DATADIR'],0705); }
 if (!is_file($GLOBALS['config']['DATADIR'].'/.htaccess')) { file_put_contents($GLOBALS['config']['DATADIR'].'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
 if ($GLOBALS['config']['ENABLE_LOCALCACHE'])
@@ -117,6 +117,12 @@ function logm($message)
     file_put_contents($GLOBALS['config']['DATADIR'].'/log.txt',$t,FILE_APPEND);
 }
 
+// Same as nl2br(), but escapes < and >
+function nl2br_escaped($html)
+{
+    return str_replace('>','&gt;',str_replace('<','&lt;',nl2br($html)));
+}
+
 /* Returns the small hash of a string
    eg. smallHash('20111006_131924') --> yZH23w
    Small hashes:
@@ -515,8 +521,8 @@ class pageBuilder
         $this->tpl->assign('linkcount',count($LINKSDB));
         $this->tpl->assign('feedurl',htmlspecialchars(indexUrl()));
         $searchcrits=''; // Search criteria
-        if (!empty($_GET['searchtags'])) $searchcrits.='&searchtags='.$_GET['searchtags'];
-        elseif (!empty($_GET['searchterm'])) $searchcrits.='&searchterm='.$_GET['searchterm'];
+        if (!empty($_GET['searchtags'])) $searchcrits.='&searchtags='.urlencode($_GET['searchtags']);
+        elseif (!empty($_GET['searchterm'])) $searchcrits.='&searchterm='.urlencode($_GET['searchterm']);
         $this->tpl->assign('searchcrits',$searchcrits);
         $this->tpl->assign('source',indexUrl());
         $this->tpl->assign('version',shaarli_version);
@@ -791,7 +797,7 @@ function showATOM()
         if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl;  // make permalink URL absolute
         $entries.='<entry><title>'.htmlspecialchars($link['title']).'</title><link href="'.$absurl.'" /><id>'.$guid.'</id>';
         if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $entries.='<updated>'.htmlspecialchars($iso8601date).'</updated>';
-        $entries.='<summary>'.nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description']))))."</summary>\n";
+        $entries.='<content type="html">'.htmlspecialchars(nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description'])))))."</content>\n";
         if ($link['tags']!='') // Adding tags to each ATOM entry (as mentioned in ATOM specification)
         {
             foreach(explode(' ',$link['tags']) as $tag)
@@ -803,14 +809,14 @@ function showATOM()
     $feed='<?xml version="1.0" encoding="UTF-8"?><feed xmlns="http://www.w3.org/2005/Atom">';
     $feed.='<title>'.htmlspecialchars($GLOBALS['title']).'</title>';
     if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $feed.='<updated>'.htmlspecialchars($latestDate).'</updated>';
-    $feed.='<link rel="self" href="'.htmlspecialchars($pageaddr).'" />';
+    $feed.='<link rel="self" href="'.htmlspecialchars(serverUrl().$_SERVER["REQUEST_URI"]).'" />';
     if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
     {
         $feed.='<!-- PubSubHubbub Discovery -->';
         $feed.='<link rel="hub" href="'.htmlspecialchars($GLOBALS['config']['PUBSUBHUB_URL']).'" />';
         $feed.='<!-- End Of PubSubHubbub Discovery -->';
     }
-    $feed.='<author><uri>'.htmlspecialchars($pageaddr).'</uri></author>';
+    $feed.='<author><name>'.htmlspecialchars($pageaddr).'</name><uri>'.htmlspecialchars($pageaddr).'</uri></author>';
     $feed.='<id>'.htmlspecialchars($pageaddr).'</id>'."\n\n"; // Yes, I know I should use a real IRI (RFC3987), but the site URL will do.
     $feed.=$entries;
     $feed.='</feed>';
@@ -1478,12 +1484,14 @@ function thumbnail($url,$href=false)
     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
         || $domain=='vimeo.com'
         || $domain=='ted.com' || endsWith($domain,'.ted.com')
+        || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
     )
     {
-        if ($domain=='vimeo.com')
-        {   // Make sure this vimeo url points to a video (/xxx... where xxx is numeric)
+        if ($domain=='vimeo.com' || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
+        {   // Make sure the url is of the form /xxx... where xxx is numeric
+            // For Vimeo's videos and xkcd's comics
             $path = parse_url($url,PHP_URL_PATH);
-            if (!preg_match('!/\d+.+?!',$path)) return ''; // This is not a single video URL.
+            if (!preg_match('!/\d+.+?!',$path)) return ''; // This is not a single video/comic URL.
         }
         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
         {   // Make sure this TED url points to a video (/talks/...)
@@ -1791,6 +1799,35 @@ function genThumbnail()
         }
     }
 
+    elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
+    {
+        // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
+        // http://xkcd.com/327/
+        // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
+        list($httpstatus,$headers,$data) = getHTTP($url,5);
+        if (strpos($httpstatus,'200 OK')!==false)
+        {
+            // Extract the link to the thumbnail
+            preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!',$data,$matches);
+            if (!empty($matches[1]))
+            {   // Let's download the image.
+                $imageurl=$matches[1];
+                list($httpstatus,$headers,$data) = getHTTP($imageurl,20); // No control on image size, so wait long enough.
+                if (strpos($httpstatus,'200 OK')!==false)
+                {
+                    $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
+                    file_put_contents($filepath,$data); // Save image to cache.
+                    if (resizeImage($filepath))
+                    {
+                        header('Content-Type: image/jpeg');
+                        echo file_get_contents($filepath);
+                        return;
+                    }
+                }
+            }
+        }
+    }
+
     else
     {
         // For all other domains, we try to download the image and make a thumbnail.