include/ParseUrl.php

   1 <?php
   2
   3 /**
   4  * @file include/ParseUrl.php
   5  * @brief Get informations about a given URL
   6  */
   7
   8 namespace Friendica;
   9
  10 use \Friendica\Core\Config;
  11
  12 require_once("include/network.php");
  13 require_once("include/Photo.php");
  14 require_once("include/oembed.php");
  15
  16 /**
  17  * @brief Class with methods for extracting certain content from an url
  18  */
  19 class ParseUrl {
  20
  21         public static function getSiteinfoCached($url, $no_guessing = false, $do_oembed = true) {
  22
  23                 if ($url == "") {
  24                         return false;
  25                 }
  26
  27                 $r = q("SELECT * FROM `parsed_url` WHERE `url` = '%s' AND `guessing` = %d AND `oembed` = %d",
  28                         dbesc(normalise_link($url)), intval(!$no_guessing), intval($do_oembed));
  29
  30                 if ($r) {
  31                         $data = $r[0]["content"];
  32                 }
  33
  34                 if (!is_null($data)) {
  35                         $data = unserialize($data);
  36                         return $data;
  37                 }
  38
  39                 $data = self::getSiteinfo($url, $no_guessing, $do_oembed);
  40
  41                 q("INSERT INTO `parsed_url` (`url`, `guessing`, `oembed`, `content`, `created`) VALUES ('%s', %d, %d, '%s', '%s')
  42                          ON DUPLICATE KEY UPDATE `content` = '%s', `created` = '%s'",
  43                         dbesc(normalise_link($url)), intval(!$no_guessing), intval($do_oembed),
  44                         dbesc(serialize($data)), dbesc(datetime_convert()),
  45                         dbesc(serialize($data)), dbesc(datetime_convert()));
  46
  47                 return $data;
  48         }
  49
  50         public static function getSiteinfo($url, $no_guessing = false, $do_oembed = true, $count = 1) {
  51
  52                 $a = get_app();
  53
  54                 $siteinfo = array();
  55
  56                 // Check if the URL does contain a scheme
  57                 $scheme = parse_url($url, PHP_URL_SCHEME);
  58
  59                 if ($scheme == "") {
  60                         $url = "http://".trim($url, "/");
  61                 }
  62
  63                 if ($count > 10) {
  64                         logger("parseurl_getsiteinfo: Endless loop detected for ".$url, LOGGER_DEBUG);
  65                         return($siteinfo);
  66                 }
  67
  68                 $url = trim($url, "'");
  69                 $url = trim($url, '"');
  70
  71                 $url = original_url($url);
  72
  73                 $siteinfo["url"] = $url;
  74                 $siteinfo["type"] = "link";
  75
  76                 $check_cert = Config::get("system", "verifyssl");
  77
  78                 $stamp1 = microtime(true);
  79
  80                 $ch = curl_init();
  81                 curl_setopt($ch, CURLOPT_URL, $url);
  82                 curl_setopt($ch, CURLOPT_HEADER, 1);
  83                 curl_setopt($ch, CURLOPT_NOBODY, 1);
  84                 curl_setopt($ch, CURLOPT_TIMEOUT, 3);
  85                 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  86                 curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
  87                 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
  88                 curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, (($check_cert) ? 2 : false));
  89
  90                 $header = curl_exec($ch);
  91                 $curl_info = @curl_getinfo($ch);
  92                 $http_code = $curl_info["http_code"];
  93                 curl_close($ch);
  94
  95                 $a->save_timestamp($stamp1, "network");
  96
  97                 if ((($curl_info["http_code"] == "301") || ($curl_info["http_code"] == "302") || ($curl_info["http_code"] == "303") || ($curl_info["http_code"] == "307"))
  98                         && (($curl_info["redirect_url"] != "") || ($curl_info["location"] != ""))) {
  99                         if ($curl_info["redirect_url"] != "") {
 100                                 $siteinfo = self::getSiteinfo($curl_info["redirect_url"], $no_guessing, $do_oembed, ++$count);
 101                         } else {
 102                                 $siteinfo = self::getSiteinfo($curl_info["location"], $no_guessing, $do_oembed, ++$count);
 103                         }
 104                         return($siteinfo);
 105                 }
 106
 107                 // If the file is too large then exit
 108                 if ($curl_info["download_content_length"] > 1000000) {
 109                         return($siteinfo);
 110                 }
 111
 112                 // If it isn't a HTML file then exit
 113                 if (($curl_info["content_type"] != "") && !strstr(strtolower($curl_info["content_type"]), "html")) {
 114                         return($siteinfo);
 115                 }
 116
 117                 if ($do_oembed) {
 118
 119                         $oembed_data = oembed_fetch_url($url);
 120
 121                         if (!in_array($oembed_data->type, array("error", "rich"))) {
 122                                 $siteinfo["type"] = $oembed_data->type;
 123                         }
 124
 125                         if (($oembed_data->type == "link") && ($siteinfo["type"] != "photo")) {
 126                                 if (isset($oembed_data->title)) {
 127                                         $siteinfo["title"] = $oembed_data->title;
 128                                 }
 129                                 if (isset($oembed_data->description)) {
 130                                         $siteinfo["text"] = trim($oembed_data->description);
 131                                 }
 132                                 if (isset($oembed_data->thumbnail_url)) {
 133                                         $siteinfo["image"] = $oembed_data->thumbnail_url;
 134                                 }
 135                         }
 136                 }
 137
 138                 $stamp1 = microtime(true);
 139
 140                 // Now fetch the body as well
 141                 $ch = curl_init();
 142                 curl_setopt($ch, CURLOPT_URL, $url);
 143                 curl_setopt($ch, CURLOPT_HEADER, 1);
 144                 curl_setopt($ch, CURLOPT_NOBODY, 0);
 145                 curl_setopt($ch, CURLOPT_TIMEOUT, 10);
 146                 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 147                 curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
 148                 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
 149                 curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, (($check_cert) ? 2 : false));
 150
 151                 $header = curl_exec($ch);
 152                 $curl_info = @curl_getinfo($ch);
 153                 $http_code = $curl_info["http_code"];
 154                 curl_close($ch);
 155
 156                 $a->save_timestamp($stamp1, "network");
 157
 158                 // Fetch the first mentioned charset. Can be in body or header
 159                 $charset = "";
 160                 if (preg_match('/charset=(.*?)['."'".'"\s\n]/', $header, $matches)) {
 161                         $charset = trim(trim(trim(array_pop($matches)), ';,'));
 162                 }
 163
 164                 if ($charset == "") {
 165                         $charset = "utf-8";
 166                 }
 167
 168                 $pos = strpos($header, "\r\n\r\n");
 169
 170                 if ($pos) {
 171                         $body = trim(substr($header, $pos));
 172                 } else {
 173                         $body = $header;
 174                 }
 175
 176                 if (($charset != "") && (strtoupper($charset) != "UTF-8")) {
 177                         logger("parseurl_getsiteinfo: detected charset ".$charset, LOGGER_DEBUG);
 178                         //$body = mb_convert_encoding($body, "UTF-8", $charset);
 179                         $body = iconv($charset, "UTF-8//TRANSLIT", $body);
 180                 }
 181
 182                 $body = mb_convert_encoding($body, 'HTML-ENTITIES', "UTF-8");
 183
 184                 $doc = new \DOMDocument();
 185                 @$doc->loadHTML($body);
 186
 187                 self::deleteNode($doc, "style");
 188                 self::deleteNode($doc, "script");
 189                 self::deleteNode($doc, "option");
 190                 self::deleteNode($doc, "h1");
 191                 self::deleteNode($doc, "h2");
 192                 self::deleteNode($doc, "h3");
 193                 self::deleteNode($doc, "h4");
 194                 self::deleteNode($doc, "h5");
 195                 self::deleteNode($doc, "h6");
 196                 self::deleteNode($doc, "ol");
 197                 self::deleteNode($doc, "ul");
 198
 199                 $xpath = new \DomXPath($doc);
 200
 201                 $list = $xpath->query("//meta[@content]");
 202                 foreach ($list as $node) {
 203                         $attr = array();
 204                         if ($node->attributes->length) {
 205                                 foreach ($node->attributes as $attribute) {
 206                                         $attr[$attribute->name] = $attribute->value;
 207                                 }
 208                         }
 209
 210                         if (@$attr["http-equiv"] == "refresh") {
 211                                 $path = $attr["content"];
 212                                 $pathinfo = explode(";", $path);
 213                                 $content = "";
 214                                 foreach ($pathinfo as $value) {
 215                                         if (substr(strtolower($value), 0, 4) == "url=") {
 216                                                 $content = substr($value, 4);
 217                                         }
 218                                 }
 219                                 if ($content != "") {
 220                                         $siteinfo = self::getSiteinfo($content, $no_guessing, $do_oembed, ++$count);
 221                                         return($siteinfo);
 222                                 }
 223                         }
 224                 }
 225
 226                 $list = $xpath->query("//title");
 227                 if ($list->length > 0) {
 228                         $siteinfo["title"] = $list->item(0)->nodeValue;
 229                 }
 230
 231                 //$list = $xpath->query("head/meta[@name]");
 232                 $list = $xpath->query("//meta[@name]");
 233                 foreach ($list as $node) {
 234                         $attr = array();
 235                         if ($node->attributes->length) {
 236                                 foreach ($node->attributes as $attribute) {
 237                                         $attr[$attribute->name] = $attribute->value;
 238                                 }
 239                         }
 240
 241                         $attr["content"] = trim(html_entity_decode($attr["content"], ENT_QUOTES, "UTF-8"));
 242
 243                         if ($attr["content"] != "") {
 244                                 switch (strtolower($attr["name"])) {
 245                                         case "fulltitle":
 246                                                 $siteinfo["title"] = $attr["content"];
 247                                                 break;
 248                                         case "description":
 249                                                 $siteinfo["text"] = $attr["content"];
 250                                                 break;
 251                                         case "thumbnail":
 252                                                 $siteinfo["image"] = $attr["content"];
 253                                                 break;
 254                                         case "twitter:image":
 255                                                 $siteinfo["image"] = $attr["content"];
 256                                                 break;
 257                                         case "twitter:image:src":
 258                                                 $siteinfo["image"] = $attr["content"];
 259                                                 break;
 260                                         case "twitter:card":
 261                                                 if (($siteinfo["type"] == "") || ($attr["content"] == "photo")) {
 262                                                         $siteinfo["type"] = $attr["content"];
 263                                                 }
 264                                                 break;
 265                                         case "twitter:description":
 266                                                 $siteinfo["text"] = $attr["content"];
 267                                                 break;
 268                                         case "twitter:title":
 269                                                 $siteinfo["title"] = $attr["content"];
 270                                                 break;
 271                                         case "dc.title":
 272                                                 $siteinfo["title"] = $attr["content"];
 273                                                 break;
 274                                         case "dc.description":
 275                                                 $siteinfo["text"] = $attr["content"];
 276                                                 break;
 277                                         case "keywords":
 278                                                 $keywords = explode(",", $attr["content"]);
 279                                                 break;
 280                                         case "news_keywords":
 281                                                 $keywords = explode(",", $attr["content"]);
 282                                                 break;
 283                                 }
 284                         }
 285                         if ($siteinfo["type"] == "summary") {
 286                                 $siteinfo["type"] = "link";
 287                         }
 288                 }
 289
 290                 if (isset($keywords)) {
 291                         $siteinfo["keywords"] = array();
 292                         foreach ($keywords as $keyword) {
 293                                 if (!in_array(trim($keyword), $siteinfo["keywords"])) {
 294                                         $siteinfo["keywords"][] = trim($keyword);
 295                                 }
 296                         }
 297                 }
 298
 299                 //$list = $xpath->query("head/meta[@property]");
 300                 $list = $xpath->query("//meta[@property]");
 301                 foreach ($list as $node) {
 302                         $attr = array();
 303                         if ($node->attributes->length) {
 304                                 foreach ($node->attributes as $attribute) {
 305                                         $attr[$attribute->name] = $attribute->value;
 306                                 }
 307                         }
 308
 309                         $attr["content"] = trim(html_entity_decode($attr["content"], ENT_QUOTES, "UTF-8"));
 310
 311                         if ($attr["content"] != "") {
 312                                 switch (strtolower($attr["property"])) {
 313                                         case "og:image":
 314                                                 $siteinfo["image"] = $attr["content"];
 315                                                 break;
 316                                         case "og:title":
 317                                                 $siteinfo["title"] = $attr["content"];
 318                                                 break;
 319                                         case "og:description":
 320                                                 $siteinfo["text"] = $attr["content"];
 321                                                 break;
 322                                 }
 323                         }
 324                 }
 325
 326                 if ((@$siteinfo["image"] == "") && !$no_guessing) {
 327                         $list = $xpath->query("//img[@src]");
 328                         foreach ($list as $node) {
 329                                 $attr = array();
 330                                 if ($node->attributes->length) {
 331                                         foreach ($node->attributes as $attribute) {
 332                                                 $attr[$attribute->name] = $attribute->value;
 333                                         }
 334                                 }
 335
 336                                 $src = self::completeUrl($attr["src"], $url);
 337                                 $photodata = get_photo_info($src);
 338
 339                                 if (($photodata) && ($photodata[0] > 150) && ($photodata[1] > 150)) {
 340                                         if ($photodata[0] > 300) {
 341                                                 $photodata[1] = round($photodata[1] * (300 / $photodata[0]));
 342                                                 $photodata[0] = 300;
 343                                         }
 344                                         if ($photodata[1] > 300) {
 345                                                 $photodata[0] = round($photodata[0] * (300 / $photodata[1]));
 346                                                 $photodata[1] = 300;
 347                                         }
 348                                         $siteinfo["images"][] = array("src" => $src,
 349                                                                         "width" => $photodata[0],
 350                                                                         "height" => $photodata[1]);
 351                                 }
 352
 353                                 }
 354                 } elseif ($siteinfo["image"] != "") {
 355                         $src = self::completeUrl($siteinfo["image"], $url);
 356
 357                         unset($siteinfo["image"]);
 358
 359                         $photodata = get_photo_info($src);
 360
 361                         if (($photodata) && ($photodata[0] > 10) && ($photodata[1] > 10)) {
 362                                 $siteinfo["images"][] = array("src" => $src,
 363                                                                 "width" => $photodata[0],
 364                                                                 "height" => $photodata[1]);
 365                         }
 366                 }
 367
 368                 if ((@$siteinfo["text"] == "") && (@$siteinfo["title"] != "") && !$no_guessing) {
 369                         $text = "";
 370
 371                         $list = $xpath->query("//div[@class='article']");
 372                         foreach ($list as $node) {
 373                                 if (strlen($node->nodeValue) > 40) {
 374                                         $text .= " ".trim($node->nodeValue);
 375                                 }
 376                         }
 377
 378                         if ($text == "") {
 379                                 $list = $xpath->query("//div[@class='content']");
 380                                 foreach ($list as $node) {
 381                                         if (strlen($node->nodeValue) > 40) {
 382                                                 $text .= " ".trim($node->nodeValue);
 383                                         }
 384                                 }
 385                         }
 386
 387                         // If none text was found then take the paragraph content
 388                         if ($text == "") {
 389                                 $list = $xpath->query("//p");
 390                                 foreach ($list as $node) {
 391                                         if (strlen($node->nodeValue) > 40) {
 392                                                 $text .= " ".trim($node->nodeValue);
 393                                         }
 394                                 }
 395                         }
 396
 397                         if ($text != "") {
 398                                 $text = trim(str_replace(array("\n", "\r"), array(" ", " "), $text));
 399
 400                                 while (strpos($text, "  ")) {
 401                                         $text = trim(str_replace("  ", " ", $text));
 402                                 }
 403
 404                                 $siteinfo["text"] = trim(html_entity_decode(substr($text, 0, 350), ENT_QUOTES, "UTF-8").'...');
 405                         }
 406                 }
 407
 408                 logger("parseurl_getsiteinfo: Siteinfo for ".$url." ".print_r($siteinfo, true), LOGGER_DEBUG);
 409
 410                 call_hooks("getsiteinfo", $siteinfo);
 411
 412                 return($siteinfo);
 413         }
 414
 415         /**
 416          * @brief Convert tags from CSV to an array
 417          *
 418          * @param string $string Tags
 419          * @return array with formatted Hashtags
 420          */
 421         public static function convertTagsToArray($string) {
 422                 $arr_tags = str_getcsv($string);
 423                 if (count($arr_tags)) {
 424                         // add the # sign to every tag
 425                         array_walk($arr_tags, array("self", "arrAddHashes"));
 426
 427                         return $arr_tags;
 428                 }
 429         }
 430
 431         /**
 432          * @brief Add a hasht sign to a string
 433          *
 434          *  This method is used as callback function
 435          *
 436          * @param string $tag The pure tag name
 437          * @param int $k Counter for internal use
 438          */
 439         private static function arrAddHashes(&$tag, $k) {
 440                 $tag = "#" . $tag;
 441         }
 442
 443         private static function deleteNode(&$doc, $node) {
 444                 $xpath = new \DomXPath($doc);
 445                 $list = $xpath->query("//".$node);
 446                 foreach ($list as $child) {
 447                         $child->parentNode->removeChild($child);
 448                 }
 449         }
 450
 451         private static function completeUrl($url, $scheme) {
 452                 $urlarr = parse_url($url);
 453
 454                 if (isset($urlarr["scheme"])) {
 455                         return($url);
 456                 }
 457
 458                 $schemearr = parse_url($scheme);
 459
 460                 $complete = $schemearr["scheme"]."://".$schemearr["host"];
 461
 462                 if (@$schemearr["port"] != "") {
 463                         $complete .= ":".$schemearr["port"];
 464                 }
 465
 466                 if (strpos($urlarr["path"],"/") !== 0) {
 467                         $complete .= "/";
 468                 }
 469
 470                 $complete .= $urlarr["path"];
 471
 472                 if (@$urlarr["query"] != "") {
 473                         $complete .= "?".$urlarr["query"];
 474                 }
 475
 476                 if (@$urlarr["fragment"] != "") {
 477                         $complete .= "#".$urlarr["fragment"];
 478                 }
 479
 480                 return($complete);
 481         }
 482 }