plugins/af_readability/init.php

   1 <?php
   2 class Af_Readability extends Plugin {
   3
   4         private $host;
   5
   6         function about() {
   7                 return array(1.0,
   8                         "Try to inline article content using Readability",
   9                         "fox");
  10         }
  11
  12         function flags() {
  13                 return array("needs_curl" => true);
  14         }
  15
  16         function save() {
  17                 $enable_share_anything = checkbox_to_sql_bool($_POST["enable_share_anything"]) == "true";
  18
  19                 $this->host->set($this, "enable_share_anything", $enable_share_anything);
  20
  21                 echo __("Data saved.");
  22         }
  23
  24         function init($host)
  25         {
  26                 $this->host = $host;
  27
  28                 $host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
  29                 $host->add_hook($host::HOOK_PREFS_TAB, $this);
  30                 $host->add_hook($host::HOOK_PREFS_EDIT_FEED, $this);
  31                 $host->add_hook($host::HOOK_PREFS_SAVE_FEED, $this);
  32
  33                 $host->add_filter_action($this, "action_inline", __("Inline content"));
  34         }
  35
  36         function hook_prefs_tab($args) {
  37                 if ($args != "prefFeeds") return;
  38
  39                 print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('af_readability settings')."\">";
  40
  41                 print_notice("Enable the plugin for specific feeds in the feed editor.");
  42
  43                 print "<form dojoType=\"dijit.form.Form\">";
  44
  45                 print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
  46                         evt.preventDefault();
  47                         if (this.validate()) {
  48                                 console.log(dojo.objectToQuery(this.getValues()));
  49                                 new Ajax.Request('backend.php', {
  50                                         parameters: dojo.objectToQuery(this.getValues()),
  51                                         onComplete: function(transport) {
  52                                                 notify_info(transport.responseText);
  53                                         }
  54                                 });
  55                                 //this.reset();
  56                         }
  57                         </script>";
  58
  59                 print_hidden("op", "pluginhandler");
  60                 print_hidden("method", "save");
  61                 print_hidden("plugin", "af_readability");
  62
  63                 $enable_share_anything = $this->host->get($this, "enable_share_anything");
  64                 $enable_share_anything_checked = $enable_share_anything ? "checked" : "";
  65
  66                 print "<input dojoType=\"dijit.form.CheckBox\"
  67                         $enable_share_anything_checked name=\"enable_share_anything\" id=\"enable_share_anything\">
  68                         <label for=\"enable_share_anything\">" . __("Use Readability for pages shared via bookmarklet.") . "</label>";
  69
  70                 print "<p><button dojoType=\"dijit.form.Button\" type=\"submit\">".
  71                                 __("Save")."</button>";
  72
  73                 print "</form>";
  74
  75                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  76                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
  77
  78                 $enabled_feeds = $this->filter_unknown_feeds($enabled_feeds);
  79                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  80
  81                 if (count($enabled_feeds) > 0) {
  82                         print "<h3>" . __("Currently enabled for (click to edit):") . "</h3>";
  83
  84                         print "<ul class=\"browseFeedList\" style=\"border-width : 1px\">";
  85                         foreach ($enabled_feeds as $f) {
  86                                 print "<li>" .
  87                                         "<img src='images/pub_set.png'
  88                                                 style='vertical-align : middle'> <a href='#'
  89                                                 onclick='editFeed($f)'>".
  90                                         getFeedTitle($f) . "</a></li>";
  91                         }
  92                         print "</ul>";
  93                 }
  94
  95                 print "</div>";
  96         }
  97
  98         function hook_prefs_edit_feed($feed_id) {
  99                 print "<div class=\"dlgSec\">".__("Readability")."</div>";
 100                 print "<div class=\"dlgSecCont\">";
 101
 102                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 103                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
 104
 105                 $key = array_search($feed_id, $enabled_feeds);
 106                 $checked = $key !== FALSE ? "checked" : "";
 107
 108                 print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"af_readability_enabled\"
 109                         name=\"af_readability_enabled\"
 110                         $checked>&nbsp;<label for=\"af_readability_enabled\">".__('Inline article content')."</label>";
 111
 112                 print "</div>";
 113         }
 114
 115         function hook_prefs_save_feed($feed_id) {
 116                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 117                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
 118
 119                 $enable = checkbox_to_sql_bool($_POST["af_readability_enabled"]) == 'true';
 120                 $key = array_search($feed_id, $enabled_feeds);
 121
 122                 if ($enable) {
 123                         if ($key === FALSE) {
 124                                 array_push($enabled_feeds, $feed_id);
 125                         }
 126                 } else {
 127                         if ($key !== FALSE) {
 128                                 unset($enabled_feeds[$key]);
 129                         }
 130                 }
 131
 132                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
 133         }
 134
 135         function hook_article_filter_action($article, $action) {
 136                 return $this->process_article($article);
 137         }
 138
 139         public function extract_content($url) {
 140                 if (!class_exists("Readability")) require_once(dirname(dirname(__DIR__)). "/lib/readability/Readability.php");
 141
 142                 if (!defined('NO_CURL') && function_exists('curl_init') && !ini_get("open_basedir")) {
 143
 144                         $ch = curl_init($url);
 145
 146                         curl_setopt($ch, CURLOPT_TIMEOUT, 5);
 147                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 148                         curl_setopt($ch, CURLOPT_HEADER, true);
 149                         curl_setopt($ch, CURLOPT_NOBODY, true);
 150                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 151                         curl_setopt($ch, CURLOPT_USERAGENT, SELF_USER_AGENT);
 152
 153                         @$result = curl_exec($ch);
 154                         $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
 155
 156                         if (strpos($content_type, "text/html") === FALSE)
 157                                 return false;
 158                 }
 159
 160                 $tmp = fetch_file_contents($url);
 161
 162                 if ($tmp && mb_strlen($tmp) < 1024 * 500) {
 163                         $tmpdoc = new DOMDocument("1.0", "UTF-8");
 164
 165                         if (!$tmpdoc->loadHTML('<?xml encoding="utf-8" ?>\n' . $tmp))
 166                                 return false;
 167
 168                         if (strtolower($tmpdoc->encoding) != 'utf-8') {
 169                                 $tmpxpath = new DOMXPath($tmpdoc);
 170
 171                                 foreach ($tmpxpath->query("//meta") as $elem) {
 172                                         $elem->parentNode->removeChild($elem);
 173                                 }
 174
 175                                 $tmp = $tmpdoc->saveHTML();
 176                         }
 177
 178                         $r = new Readability($tmp, $url);
 179
 180                         if ($r->init()) {
 181                                 $tmpxpath = new DOMXPath($r->dom);
 182
 183                                 $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
 184
 185                                 foreach ($entries as $entry) {
 186                                         if ($entry->hasAttribute("href")) {
 187                                                 $entry->setAttribute("href",
 188                                                                 rewrite_relative_url($url, $entry->getAttribute("href")));
 189
 190                                         }
 191
 192                                         if ($entry->hasAttribute("src")) {
 193                                                 $entry->setAttribute("src",
 194                                                                 rewrite_relative_url($url, $entry->getAttribute("src")));
 195
 196                                         }
 197
 198                                 }
 199
 200                                 return $r->articleContent->innerHTML;
 201                         }
 202                 }
 203
 204                 return false;
 205         }
 206
 207         function process_article($article) {
 208
 209                 $extracted_content = $this->extract_content($article["link"]);
 210
 211                 if ($extracted_content) {
 212                         $article["content"] = $extracted_content;
 213                 }
 214
 215                 return $article;
 216         }
 217
 218         function hook_article_filter($article) {
 219
 220                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 221                 if (!is_array($enabled_feeds)) return $article;
 222
 223                 $key = array_search($article["feed"]["id"], $enabled_feeds);
 224                 if ($key === FALSE) return $article;
 225
 226                 return $this->process_article($article);
 227
 228         }
 229
 230         function api_version() {
 231                 return 2;
 232         }
 233
 234         private function filter_unknown_feeds($enabled_feeds) {
 235                 $tmp = array();
 236
 237                 foreach ($enabled_feeds as $feed) {
 238
 239                         $result = db_query("SELECT id FROM ttrss_feeds WHERE id = '$feed' AND owner_uid = " . $_SESSION["uid"]);
 240
 241                         if (db_num_rows($result) != 0) {
 242                                 array_push($tmp, $feed);
 243                         }
 244                 }
 245
 246                 return $tmp;
 247         }
 248
 249 }
 250 ?>