plugins/af_redditimgur/init.php

   1 <?php
   2 class Af_RedditImgur extends Plugin {
   3         private $host;
   4
   5         function about() {
   6                 return array(1.0,
   7                         "Inline images (and other content) in Reddit RSS feeds",
   8                         "fox");
   9         }
  10
  11         function flags() {
  12                 return array("needs_curl" => true);
  13         }
  14
  15         function init($host) {
  16                 $this->host = $host;
  17
  18                 $host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
  19                 $host->add_hook($host::HOOK_PREFS_TAB, $this);
  20         }
  21
  22         function hook_prefs_tab($args) {
  23                 if ($args != "prefFeeds") return;
  24
  25                 print "<div id=\"af_redditimgur_prefs\" dojoType=\"dijit.layout.AccordionPane\" title=\"".__('af_redditimgur settings')."\">";
  26
  27                 $enable_readability = $this->host->get($this, "enable_readability");
  28                 $enable_readability_checked = $enable_readability ? "checked" : "";
  29
  30                 print "<form dojoType=\"dijit.form.Form\">";
  31
  32                 print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
  33                         evt.preventDefault();
  34                         if (this.validate()) {
  35                                 console.log(dojo.objectToQuery(this.getValues()));
  36                                 new Ajax.Request('backend.php', {
  37                                         parameters: dojo.objectToQuery(this.getValues()),
  38                                         onComplete: function(transport) {
  39                                                 notify_info(transport.responseText);
  40                                         }
  41                                 });
  42                                 //this.reset();
  43                         }
  44                         </script>";
  45
  46                 print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"op\" value=\"pluginhandler\">";
  47                 print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"method\" value=\"save\">";
  48                 print "<input dojoType=\"dijit.form.TextBox\" style=\"display : none\" name=\"plugin\" value=\"af_redditimgur\">";
  49
  50                 print "<p>" . __("Uses Readability (full-text-rss) implementation by <a target='_blank' href='https://bitbucket.org/fivefilters/'>FiveFilters.org</a>");
  51                 print "<p/>";
  52
  53                 print "<input dojoType=\"dijit.form.CheckBox\" id=\"enable_readability\"
  54                         $enable_readability_checked name=\"enable_readability\">&nbsp;";
  55
  56                 print "<label for=\"enable_readability\">" . __("Extract missing content using Readability") . "</label>";
  57
  58                 print "<p><button dojoType=\"dijit.form.Button\" type=\"submit\">".
  59                         __("Save")."</button>";
  60
  61                 print "</form>";
  62
  63                 print "</div>";
  64         }
  65
  66         function save() {
  67                 $enable_readability = checkbox_to_sql_bool($_POST["enable_readability"]) == "true";
  68
  69                 $this->host->set($this, "enable_readability", $enable_readability);
  70
  71                 echo __("Configuration saved");
  72         }
  73
  74         private function inline_stuff($article, &$doc, $xpath) {
  75
  76                 $entries = $xpath->query('(//a[@href]|//img[@src])');
  77
  78                 $found = false;
  79
  80                 foreach ($entries as $entry) {
  81                         if ($entry->hasAttribute("href")) {
  82
  83                                 $matches = array();
  84
  85                                 if (preg_match("/\.gfycat.com\/([a-z]+)?(\.[a-z]+)$/i", $entry->getAttribute("href"), $matches)) {
  86                                         $entry->setAttribute("href", "http://www.gfycat.com/".$matches[1]);
  87                                 }
  88
  89                                 if (preg_match("/https?:\/\/(www\.)?gfycat.com\/([a-z]+)$/i", $entry->getAttribute("href"), $matches)) {
  90
  91                                         $tmp = fetch_file_contents($entry->getAttribute("href"));
  92
  93                                         if ($tmp) {
  94                                                 $tmpdoc = new DOMDocument();
  95
  96                                                 if (@$tmpdoc->loadHTML($tmp)) {
  97                                                         $tmpxpath = new DOMXPath($tmpdoc);
  98
  99                                                         $source_meta = $tmpxpath->query("//meta[@name='twitter:player:stream' and contains(@content, '.mp4')]")->item(0);
 100                                                         $poster_meta = $tmpxpath->query("//meta[@property='og:image' and contains(@content,'thumbs.gfycat.com')]")->item(0);
 101
 102                                                         if ($source_meta) {
 103                                                                 $source_stream = $source_meta->getAttribute("content");
 104                                                                 $poster_url = false;
 105
 106                                                                 if ($source_stream) {
 107
 108                                                                         if ($poster_meta)
 109                                                                                 $poster_url = $poster_meta->getAttribute("content");
 110
 111                                                                         $this->handle_as_video($doc, $entry, $source_stream, $poster_url);
 112                                                                         $found = 1;
 113                                                                 }
 114                                                         }
 115                                                 }
 116                                         }
 117
 118                                 }
 119
 120                                 // imgur .gif -> .gifv
 121                                 if (preg_match("/i\.imgur\.com\/(.*?)\.gif$/i", $entry->getAttribute("href"))) {
 122                                         $entry->setAttribute("href",
 123                                                 str_replace(".gif", ".gifv", $entry->getAttribute("href")));
 124                                 }
 125
 126                                 if (preg_match("/\.(gifv)$/i", $entry->getAttribute("href"))) {
 127
 128                                         $source_stream = str_replace(".gifv", ".mp4", $entry->getAttribute("href"));
 129
 130                                         if (strpos($source_stream, "i.imgur.com") !== FALSE)
 131                                                 $poster_url = str_replace(".mp4", "h.jpg", $source_stream);
 132
 133                                         $this->handle_as_video($doc, $entry, $source_stream, $poster_url);
 134
 135                                         $found = true;
 136                                 }
 137
 138                                 $matches = array();
 139                                 if (preg_match("/\.youtube\.com\/v\/([\w-]+)/", $entry->getAttribute("href"), $matches) ||
 140                                         preg_match("/\.youtube\.com\/.*?[\&\?]v=([\w-]+)/", $entry->getAttribute("href"), $matches) ||
 141                                         preg_match("/\.youtube\.com\/watch\?v=([\w-]+)/", $entry->getAttribute("href"), $matches) ||
 142                                         preg_match("/\/\/youtu.be\/([\w-]+)/", $entry->getAttribute("href"), $matches)) {
 143
 144                                         $vid_id = $matches[1];
 145
 146                                         $iframe = $doc->createElement("iframe");
 147                                         $iframe->setAttribute("class", "youtube-player");
 148                                         $iframe->setAttribute("type", "text/html");
 149                                         $iframe->setAttribute("width", "640");
 150                                         $iframe->setAttribute("height", "385");
 151                                         $iframe->setAttribute("src", "https://www.youtube.com/embed/$vid_id");
 152                                         $iframe->setAttribute("allowfullscreen", "1");
 153                                         $iframe->setAttribute("frameborder", "0");
 154
 155                                         $br = $doc->createElement('br');
 156                                         $entry->parentNode->insertBefore($iframe, $entry);
 157                                         $entry->parentNode->insertBefore($br, $entry);
 158
 159                                         $found = true;
 160                                 }
 161
 162                                 if (preg_match("/\.(jpg|jpeg|gif|png)(\?[0-9][0-9]*)?$/i", $entry->getAttribute("href"))) {
 163                                         $img = $doc->createElement('img');
 164                                         $img->setAttribute("src", $entry->getAttribute("href"));
 165
 166                                         $br = $doc->createElement('br');
 167                                         $entry->parentNode->insertBefore($img, $entry);
 168                                         $entry->parentNode->insertBefore($br, $entry);
 169
 170                                         $found = true;
 171                                 }
 172
 173                                 // linked albums & pages
 174
 175                                 if (preg_match("/^https?:\/\/(m\.)?imgur.com\/([^\.\/]+$)/", $entry->getAttribute("href"), $matches) ||
 176                                         preg_match("/^https?:\/\/imgur.com\/(a|album|gallery)\/[^\.]+$/", $entry->getAttribute("href"), $matches)) {
 177
 178                                         $album_content = fetch_file_contents($entry->getAttribute("href"),
 179                                                 false, false, false, false, 10);
 180
 181                                         if ($album_content) {
 182                                                 $adoc = new DOMDocument();
 183
 184                                                 if (@$adoc->loadHTML($album_content)) {
 185                                                         $axpath = new DOMXPath($adoc);
 186                                                         $aentries = $axpath->query("//meta[@property='og:image']");
 187                                                         $urls = array();
 188
 189                                                         foreach ($aentries as $aentry) {
 190
 191                                                                 $url = str_replace("?fb", "", $aentry->getAttribute("content"));
 192                                                                 $check_url = basename($url);
 193                                                                 $check_url = mb_substr($check_url, 0, strrpos($check_url, "."));
 194
 195                                                                 if (!in_array($check_url, $urls)) {
 196                                                                         $img = $doc->createElement('img');
 197                                                                         $img->setAttribute("src", $url);
 198                                                                         $entry->parentNode->insertBefore($doc->createElement('br'), $entry);
 199
 200                                                                         $br = $doc->createElement('br');
 201
 202                                                                         $entry->parentNode->insertBefore($img, $entry);
 203                                                                         $entry->parentNode->insertBefore($br, $entry);
 204
 205                                                                         array_push($urls, $check_url);
 206
 207                                                                         $found = true;
 208                                                                 }
 209                                                         }
 210                                                 }
 211                                         }
 212                                 }
 213
 214                                 // wtf is this even
 215                                 if (preg_match("/^https?:\/\/gyazo\.com\/([^\.\/]+$)/", $entry->getAttribute("href"), $matches)) {
 216                                         $img_id = $matches[1];
 217
 218                                         $img = $doc->createElement('img');
 219                                         $img->setAttribute("src", "https://i.gyazo.com/$img_id.jpg");
 220
 221                                         $br = $doc->createElement('br');
 222                                         $entry->parentNode->insertBefore($img, $entry);
 223                                         $entry->parentNode->insertBefore($br, $entry);
 224
 225                                         $found = true;
 226                                 }
 227                         }
 228
 229                         // remove tiny thumbnails
 230                         if ($entry->hasAttribute("src")) {
 231                                 if ($entry->parentNode && $entry->parentNode->parentNode) {
 232                                         $entry->parentNode->parentNode->removeChild($entry->parentNode);
 233                                 }
 234                         }
 235                 }
 236
 237                 return $found;
 238         }
 239
 240         function hook_article_filter($article) {
 241
 242                 if (strpos($article["link"], "reddit.com/r/") !== FALSE) {
 243                         $doc = new DOMDocument();
 244                         @$doc->loadHTML($article["content"]);
 245                         $xpath = new DOMXPath($doc);
 246
 247                         $content_link = $xpath->query("(//a[contains(., '[link]')])")->item(0);
 248
 249                         $found = $this->inline_stuff($article, $doc, $xpath);
 250
 251                         // reddit decided to break its rss because of thunderbird so let's implement a temporary hack
 252                         // see also: https://www.reddit.com/r/changelog/comments/428vdq/upcoming_reddit_change_switching_from_rss_20_to/
 253
 254                         $textnode = $xpath->query("//*[text()[contains(.,'!-- SC_OFF')]]/text()")->item(0);
 255
 256                         if ($textnode) {
 257
 258                                 $badhtml = htmlspecialchars_decode($textnode->textContent);
 259                                 $textnode->textContent = "";
 260
 261                                 if ($badhtml) {
 262                                         $body = $doc->getElementsByTagName("body")->item(0);
 263
 264                                         $tmp = new DOMDocument;
 265
 266                                         if (@$tmp->loadHTML($badhtml)) {
 267                                                 $newnode = $doc->importNode($tmp->documentElement, TRUE);
 268
 269                                                 if ($newnode) {
 270                                                         $body->insertBefore($newnode, $body->firstChild);
 271                                                         $found = 1;
 272                                                 }
 273                                         }
 274                                 }
 275                         }
 276
 277                         if (!defined('NO_CURL') && function_exists("curl_init") && !$found && $this->host->get($this, "enable_readability") &&
 278                                 mb_strlen(strip_tags($article["content"])) <= 150) {
 279
 280                                 if (!class_exists("Readability")) require_once(dirname(dirname(__DIR__)). "/lib/readability/Readability.php");
 281
 282                                 if ($content_link &&
 283                                         strpos($content_link->getAttribute("href"), "twitter.com") === FALSE &&
 284                                         strpos($content_link->getAttribute("href"), "youtube.com") === FALSE &&
 285                                         strpos($content_link->getAttribute("href"), "reddit.com") === FALSE) {
 286
 287                                         /* link may lead to a huge video file or whatever, we need to check content type before trying to
 288                                         parse it which p much requires curl */
 289
 290                                         $ch = curl_init($content_link->getAttribute("href"));
 291                                         curl_setopt($ch, CURLOPT_TIMEOUT, 5);
 292                                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 293                                         curl_setopt($ch, CURLOPT_HEADER, true);
 294                                         curl_setopt($ch, CURLOPT_NOBODY, true);
 295                                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir"));
 296                                         curl_setopt($ch, CURLOPT_USERAGENT, SELF_USER_AGENT);
 297
 298                                         @$result = curl_exec($ch);
 299                                         $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
 300
 301                                         if ($content_type && strpos($content_type, "text/html") !== FALSE) {
 302
 303                                                 $tmp = fetch_file_contents($content_link->getAttribute("href"));
 304
 305                                                 //_debug("tmplen: " . mb_strlen($tmp));
 306
 307                                                 if ($tmp && mb_strlen($tmp) < 65535 * 4) {
 308
 309                                                         $r = new Readability($tmp, $content_link->getAttribute("href"));
 310
 311                                                         if ($r->init()) {
 312
 313                                                                 $tmpxpath = new DOMXPath($r->dom);
 314
 315                                                                 $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
 316
 317                                                                 foreach ($entries as $entry) {
 318                                                                         if ($entry->hasAttribute("href")) {
 319                                                                                 $entry->setAttribute("href",
 320                                                                                         rewrite_relative_url($content_link->getAttribute("href"), $entry->getAttribute("href")));
 321
 322                                                                         }
 323
 324                                                                         if ($entry->hasAttribute("src")) {
 325                                                                                 $entry->setAttribute("src",
 326                                                                                         rewrite_relative_url($content_link->getAttribute("href"), $entry->getAttribute("src")));
 327
 328                                                                         }
 329
 330                                                                 }
 331
 332                                                                 $article["content"] = $r->articleContent->innerHTML . "<hr/>" . $article["content"];
 333
 334                                                                 // prob not a very good idea (breaks wikipedia pages, etc) -
 335                                                                 // inliner currently is not really fit for any random web content
 336
 337                                                                 //$doc = new DOMDocument();
 338                                                                 //@$doc->loadHTML($article["content"]);
 339                                                                 //$xpath = new DOMXPath($doc);
 340                                                                 //$found = $this->inline_stuff($article, $doc, $xpath);
 341                                                         }
 342                                                 }
 343                                         }
 344                                 }
 345
 346                         }
 347
 348                         $node = $doc->getElementsByTagName('body')->item(0);
 349
 350                         if ($node && $found) {
 351                                 $article["content"] = $doc->saveXML($node);
 352                         }
 353                 }
 354
 355                 return $article;
 356         }
 357
 358         function api_version() {
 359                 return 2;
 360         }
 361
 362         private function handle_as_video($doc, $entry, $source_stream, $poster_url = false) {
 363
 364                 $video = $doc->createElement('video');
 365                 $video->setAttribute("autoplay", "1");
 366                 $video->setAttribute("controls", "1");
 367                 $video->setAttribute("loop", "1");
 368
 369                 if ($poster_url) $video->setAttribute("poster", $poster_url);
 370
 371                 $source = $doc->createElement('source');
 372                 $source->setAttribute("src", $source_stream);
 373                 $source->setAttribute("type", "video/mp4");
 374
 375                 $video->appendChild($source);
 376
 377                 $br = $doc->createElement('br');
 378                 $entry->parentNode->insertBefore($video, $entry);
 379                 $entry->parentNode->insertBefore($br, $entry);
 380
 381                 $img = $doc->createElement('img');
 382                 $img->setAttribute("src",
 383                         "data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D");
 384
 385                 $entry->parentNode->insertBefore($img, $entry);
 386         }
 387 }
 388 ?>