mod/parse_url.php

   1 <?php
   2 /* To-Do
   3 https://developers.google.com/+/plugins/snippet/
   4
   5 <meta itemprop="name" content="Toller Titel">
   6 <meta itemprop="description" content="Eine tolle Beschreibung">
   7 <meta itemprop="image" content="http://maple.libertreeproject.org/images/tree-icon.png">
   8
   9 <body itemscope itemtype="http://schema.org/Product">
  10   <h1 itemprop="name">Shiny Trinket</h1>
  11   <img itemprop="image" src="{image-url}" />
  12   <p itemprop="description">Shiny trinkets are shiny.</p>
  13 </body>
  14 */
  15
  16 if(!function_exists('deletenode')) {
  17         function deletenode(&$doc, $node)
  18         {
  19                 $xpath = new DomXPath($doc);
  20                 $list = $xpath->query("//".$node);
  21                 foreach ($list as $child)
  22                         $child->parentNode->removeChild($child);
  23         }
  24 }
  25
  26 function completeurl($url, $scheme) {
  27         $urlarr = parse_url($url);
  28
  29         if (isset($urlarr["scheme"]))
  30                 return($url);
  31
  32         $schemearr = parse_url($scheme);
  33
  34         $complete = $schemearr["scheme"]."://".$schemearr["host"];
  35
  36         if ($schemearr["port"] != "")
  37                 $complete .= ":".$schemearr["port"];
  38
  39                 if(strpos($urlarr['path'],'/') !== 0)
  40                         $complete .= '/';
  41
  42         $complete .= $urlarr["path"];
  43
  44         if ($urlarr["query"] != "")
  45                 $complete .= "?".$urlarr["query"];
  46
  47         if ($urlarr["fragment"] != "")
  48                 $complete .= "#".$urlarr["fragment"];
  49
  50         return($complete);
  51 }
  52
  53 function parseurl_getsiteinfo($url) {
  54         $siteinfo = array();
  55
  56         $ch = curl_init();
  57         curl_setopt($ch, CURLOPT_URL, $url);
  58         curl_setopt($ch, CURLOPT_HEADER, 1);
  59         curl_setopt($ch, CURLOPT_NOBODY, 0);
  60         curl_setopt($ch, CURLOPT_TIMEOUT, 3);
  61         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  62         curl_setopt($ch,CURLOPT_USERAGENT,'Opera/9.64(Windows NT 5.1; U; de) Presto/2.1.1');
  63
  64         $header = curl_exec($ch);
  65         curl_close($ch);
  66
  67         // Fetch the first mentioned charset. Can be in body or header
  68         if (preg_match('/charset=(.*?)['."'".'"\s\n]/', $header, $matches))
  69                 $charset = trim(array_pop($matches));
  70         else
  71                 $charset = "utf-8";
  72
  73         $pos = strpos($header, "\r\n\r\n");
  74
  75         if ($pos)
  76                 $body = trim(substr($header, $pos));
  77         else
  78                 $body = $header;
  79
  80         $body = mb_convert_encoding($body, "UTF-8", $charset);
  81         $body = mb_convert_encoding($body, 'HTML-ENTITIES', "UTF-8");
  82
  83         $doc = new DOMDocument();
  84         @$doc->loadHTML($body);
  85
  86         deletenode($doc, 'style');
  87         deletenode($doc, 'script');
  88         deletenode($doc, 'option');
  89         deletenode($doc, 'h1');
  90         deletenode($doc, 'h2');
  91         deletenode($doc, 'h3');
  92         deletenode($doc, 'h4');
  93         deletenode($doc, 'h5');
  94         deletenode($doc, 'h6');
  95         deletenode($doc, 'ol');
  96         deletenode($doc, 'ul');
  97
  98         $xpath = new DomXPath($doc);
  99
 100         //$list = $xpath->query("head/title");
 101         $list = $xpath->query("//title");
 102         foreach ($list as $node)
 103                 $siteinfo["title"] =  html_entity_decode($node->nodeValue, ENT_QUOTES, "UTF-8");
 104
 105         //$list = $xpath->query("head/meta[@name]");
 106         $list = $xpath->query("//meta[@name]");
 107         foreach ($list as $node) {
 108                 $attr = array();
 109                 if ($node->attributes->length)
 110                         foreach ($node->attributes as $attribute)
 111                                 $attr[$attribute->name] = $attribute->value;
 112
 113                 $attr["content"] = html_entity_decode($attr["content"], ENT_QUOTES, "UTF-8");
 114
 115                 switch (strtolower($attr["name"])) {
 116                         case "fulltitle":
 117                                 $siteinfo["title"] = $attr["content"];
 118                                 break;
 119                         case "description":
 120                                 $siteinfo["text"] = $attr["content"];
 121                                 break;
 122                         case "dc.title":
 123                                 $siteinfo["title"] = $attr["content"];
 124                                 break;
 125                         case "dc.description":
 126                                 $siteinfo["text"] = $attr["content"];
 127                                 break;
 128                 }
 129         }
 130
 131         //$list = $xpath->query("head/meta[@property]");
 132         $list = $xpath->query("//meta[@property]");
 133         foreach ($list as $node) {
 134                 $attr = array();
 135                 if ($node->attributes->length)
 136                         foreach ($node->attributes as $attribute)
 137                                 $attr[$attribute->name] = $attribute->value;
 138
 139                 $attr["content"] = html_entity_decode($attr["content"], ENT_QUOTES, "UTF-8");
 140
 141                 switch (strtolower($attr["property"])) {
 142                         case "og:image":
 143                                 $siteinfo["image"] = $attr["content"];
 144                                 break;
 145                         case "og:title":
 146                                 $siteinfo["title"] = $attr["content"];
 147                                 break;
 148                         case "og:description":
 149                                 $siteinfo["text"] = $attr["content"];
 150                                 break;
 151                 }
 152         }
 153
 154         if ($siteinfo["image"] == "") {
 155             $list = $xpath->query("//img[@src]");
 156             foreach ($list as $node) {
 157                 $attr = array();
 158                 if ($node->attributes->length)
 159                     foreach ($node->attributes as $attribute)
 160                         $attr[$attribute->name] = $attribute->value;
 161
 162                         $src = completeurl($attr["src"], $url);
 163                         $photodata = @getimagesize($src);
 164
 165                         if (($photodata) && ($photodata[0] > 150) and ($photodata[1] > 150)) {
 166                                 if ($photodata[0] > 300) {
 167                                         $photodata[1] = round($photodata[1] * (300 / $photodata[0]));
 168                                         $photodata[0] = 300;
 169                                 }
 170                                 if ($photodata[1] > 300) {
 171                                         $photodata[0] = round($photodata[0] * (300 / $photodata[1]));
 172                                         $photodata[1] = 300;
 173                                 }
 174                                 $siteinfo["images"][] = array("src"=>$src,
 175                                                                 "width"=>$photodata[0],
 176                                                                 "height"=>$photodata[1]);
 177                         }
 178
 179                 }
 180     } else {
 181                 $src = completeurl($siteinfo["image"], $url);
 182
 183                 unset($siteinfo["image"]);
 184
 185                 $photodata = @getimagesize($src);
 186
 187                 if (($photodata) && ($photodata[0] > 10) and ($photodata[1] > 10))
 188                         $siteinfo["images"][] = array("src"=>$src,
 189                                                         "width"=>$photodata[0],
 190                                                         "height"=>$photodata[1]);
 191         }
 192
 193         if ($siteinfo["text"] == "") {
 194                 $text = "";
 195
 196                 $list = $xpath->query("//div[@class='article']");
 197                 foreach ($list as $node)
 198                         if (strlen($node->nodeValue) > 40)
 199                                 $text .= " ".trim($node->nodeValue);
 200
 201                 if ($text == "") {
 202                         $list = $xpath->query("//div[@class='content']");
 203                         foreach ($list as $node)
 204                                 if (strlen($node->nodeValue) > 40)
 205                                         $text .= " ".trim($node->nodeValue);
 206                 }
 207
 208                 // If none text was found then take the paragraph content
 209                 if ($text == "") {
 210                         $list = $xpath->query("//p");
 211                         foreach ($list as $node)
 212                                 if (strlen($node->nodeValue) > 40)
 213                                         $text .= " ".trim($node->nodeValue);
 214                 }
 215
 216                 if ($text != "") {
 217                         $text = trim(str_replace(array("\n", "\r"), array(" ", " "), $text));
 218
 219                         while (strpos($text, "  "))
 220                                 $text = trim(str_replace("  ", " ", $text));
 221
 222                         $siteinfo["text"] = html_entity_decode(substr($text,0,350), ENT_QUOTES, "UTF-8").'...';
 223                 }
 224         }
 225
 226         return($siteinfo);
 227 }
 228
 229 function arr_add_hashes(&$item,$k) {
 230         $item = '#' . $item;
 231 }
 232
 233 function parse_url_content(&$a) {
 234
 235         $text = null;
 236         $str_tags = '';
 237
 238         $textmode = false;
 239
 240         if(local_user() && (! feature_enabled(local_user(),'richtext')))
 241                 $textmode = true;
 242
 243         //if($textmode)
 244         $br = (($textmode) ? "\n" : '<br />');
 245
 246         if(x($_GET,'binurl'))
 247                 $url = trim(hex2bin($_GET['binurl']));
 248         else
 249                 $url = trim($_GET['url']);
 250
 251         if($_GET['title'])
 252                 $title = strip_tags(trim($_GET['title']));
 253
 254         if($_GET['description'])
 255                 $text = strip_tags(trim($_GET['description']));
 256
 257         if($_GET['tags']) {
 258                 $arr_tags = str_getcsv($_GET['tags']);
 259                 if(count($arr_tags)) {
 260                         array_walk($arr_tags,'arr_add_hashes');
 261                         $str_tags = $br . implode(' ',$arr_tags) . $br;
 262                 }
 263         }
 264
 265         logger('parse_url: ' . $url);
 266
 267         if($textmode)
 268                 $template = $br . '[bookmark=%s]%s[/bookmark]%s' . $br;
 269         else
 270                 $template = "<br /><a class=\"bookmark\" href=\"%s\" >%s</a>%s<br />";
 271
 272         $arr = array('url' => $url, 'text' => '');
 273
 274         call_hooks('parse_link', $arr);
 275
 276         if(strlen($arr['text'])) {
 277                 echo $arr['text'];
 278                 killme();
 279         }
 280
 281
 282         if($url && $title && $text) {
 283
 284                 if($textmode)
 285                         $text = $br . '[quote]' . trim($text) . '[/quote]' . $br;
 286                 else
 287                         $text = '<br /><blockquote>' . trim($text) . '</blockquote><br />';
 288
 289                 $title = str_replace(array("\r","\n"),array('',''),$title);
 290
 291                 $result = sprintf($template,$url,($title) ? $title : $url,$text) . $str_tags;
 292
 293                 logger('parse_url (unparsed): returns: ' . $result);
 294
 295                 echo $result;
 296                 killme();
 297         }
 298
 299         $siteinfo = parseurl_getsiteinfo($url);
 300
 301         if($siteinfo["title"] == "") {
 302                 echo sprintf($template,$url,$url,'') . $str_tags;
 303                 killme();
 304         } else {
 305                 $text = $siteinfo["text"];
 306                 $title = $siteinfo["title"];
 307         }
 308
 309         $image = "";
 310
 311         if(sizeof($siteinfo["images"]) > 0){
 312                 /* Execute below code only if image is present in siteinfo */
 313
 314                 $total_images = 0;
 315                 $max_images = get_config('system','max_bookmark_images');
 316                 if($max_images === false)
 317                         $max_images = 2;
 318                 else
 319                         $max_images = intval($max_images);
 320
 321                 foreach ($siteinfo["images"] as $imagedata) {
 322                         if($textmode)
 323                                 $image .= '[img='.$imagedata["width"].'x'.$imagedata["height"].']'.$imagedata["src"].'[/img]' . "\n";
 324                         else
 325                                 $image .= '<img height="'.$imagedata["height"].'" width="'.$imagedata["width"].'" src="'.$imagedata["src"].'" alt="photo" /><br />';
 326                         $total_images ++;
 327                         if($max_images && $max_images >= $total_images)
 328                                 break;
 329         }
 330         }
 331
 332         if(strlen($text)) {
 333                 if($textmode)
 334                         $text = $br.'[quote]'.trim($text).'[/quote]'.$br ;
 335                 else
 336                         $text = '<br /><blockquote>'.trim($text).'</blockquote><br />';
 337         }
 338
 339         if($image) {
 340                 $text = $br.$br.$image.$text;
 341         }
 342         $title = str_replace(array("\r","\n"),array('',''),$title);
 343
 344         $result = sprintf($template,$url,($title) ? $title : $url,$text) . $str_tags;
 345
 346         logger('parse_url: returns: ' . $result);
 347
 348         echo trim($result);
 349         killme();
 350 }