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friendica/include/ParseUrl.php

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PHP
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<?php
/**
* @file include/ParseUrl.php
* @brief Get informations about a given URL
*/
namespace Friendica;
use \Friendica\Core\Config;
require_once("include/network.php");
require_once("include/Photo.php");
require_once("include/oembed.php");
/**
* @brief Class with methods for extracting certain content from an url
*/
class ParseUrl {
public static function getSiteinfoCached($url, $no_guessing = false, $do_oembed = true) {
if ($url == "") {
return false;
}
$r = q("SELECT * FROM `parsed_url` WHERE `url` = '%s' AND `guessing` = %d AND `oembed` = %d",
dbesc(normalise_link($url)), intval(!$no_guessing), intval($do_oembed));
if ($r) {
$data = $r[0]["content"];
}
if (!is_null($data)) {
$data = unserialize($data);
return $data;
}
$data = self::getSiteinfo($url, $no_guessing, $do_oembed);
q("INSERT INTO `parsed_url` (`url`, `guessing`, `oembed`, `content`, `created`) VALUES ('%s', %d, %d, '%s', '%s')
ON DUPLICATE KEY UPDATE `content` = '%s', `created` = '%s'",
dbesc(normalise_link($url)), intval(!$no_guessing), intval($do_oembed),
dbesc(serialize($data)), dbesc(datetime_convert()),
dbesc(serialize($data)), dbesc(datetime_convert()));
return $data;
}
public static function getSiteinfo($url, $no_guessing = false, $do_oembed = true, $count = 1) {
$a = get_app();
$siteinfo = array();
// Check if the URL does contain a scheme
$scheme = parse_url($url, PHP_URL_SCHEME);
if ($scheme == "") {
$url = "http://".trim($url, "/");
}
if ($count > 10) {
logger("parseurl_getsiteinfo: Endless loop detected for ".$url, LOGGER_DEBUG);
return($siteinfo);
}
$url = trim($url, "'");
$url = trim($url, '"');
$url = original_url($url);
$siteinfo["url"] = $url;
$siteinfo["type"] = "link";
$check_cert = Config::get("system", "verifyssl");
$stamp1 = microtime(true);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 3);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, (($check_cert) ? 2 : false));
$header = curl_exec($ch);
$curl_info = @curl_getinfo($ch);
$http_code = $curl_info["http_code"];
curl_close($ch);
$a->save_timestamp($stamp1, "network");
if ((($curl_info["http_code"] == "301") || ($curl_info["http_code"] == "302") || ($curl_info["http_code"] == "303") || ($curl_info["http_code"] == "307"))
&& (($curl_info["redirect_url"] != "") || ($curl_info["location"] != ""))) {
if ($curl_info["redirect_url"] != "") {
$siteinfo = self::getSiteinfo($curl_info["redirect_url"], $no_guessing, $do_oembed, ++$count);
} else {
$siteinfo = self::getSiteinfo($curl_info["location"], $no_guessing, $do_oembed, ++$count);
}
return($siteinfo);
}
// If the file is too large then exit
if ($curl_info["download_content_length"] > 1000000) {
return($siteinfo);
}
// If it isn't a HTML file then exit
if (($curl_info["content_type"] != "") && !strstr(strtolower($curl_info["content_type"]), "html")) {
return($siteinfo);
}
if ($do_oembed) {
$oembed_data = oembed_fetch_url($url);
if (!in_array($oembed_data->type, array("error", "rich"))) {
$siteinfo["type"] = $oembed_data->type;
}
if (($oembed_data->type == "link") && ($siteinfo["type"] != "photo")) {
if (isset($oembed_data->title)) {
$siteinfo["title"] = $oembed_data->title;
}
if (isset($oembed_data->description)) {
$siteinfo["text"] = trim($oembed_data->description);
}
if (isset($oembed_data->thumbnail_url)) {
$siteinfo["image"] = $oembed_data->thumbnail_url;
}
}
}
$stamp1 = microtime(true);
// Now fetch the body as well
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 0);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, (($check_cert) ? 2 : false));
$header = curl_exec($ch);
$curl_info = @curl_getinfo($ch);
$http_code = $curl_info["http_code"];
curl_close($ch);
$a->save_timestamp($stamp1, "network");
// Fetch the first mentioned charset. Can be in body or header
$charset = "";
if (preg_match('/charset=(.*?)['."'".'"\s\n]/', $header, $matches)) {
$charset = trim(trim(trim(array_pop($matches)), ';,'));
}
if ($charset == "") {
$charset = "utf-8";
}
$pos = strpos($header, "\r\n\r\n");
if ($pos) {
$body = trim(substr($header, $pos));
} else {
$body = $header;
}
if (($charset != "") && (strtoupper($charset) != "UTF-8")) {
logger("parseurl_getsiteinfo: detected charset ".$charset, LOGGER_DEBUG);
//$body = mb_convert_encoding($body, "UTF-8", $charset);
$body = iconv($charset, "UTF-8//TRANSLIT", $body);
}
$body = mb_convert_encoding($body, 'HTML-ENTITIES', "UTF-8");
$doc = new \DOMDocument();
@$doc->loadHTML($body);
self::deleteNode($doc, "style");
self::deleteNode($doc, "script");
self::deleteNode($doc, "option");
self::deleteNode($doc, "h1");
self::deleteNode($doc, "h2");
self::deleteNode($doc, "h3");
self::deleteNode($doc, "h4");
self::deleteNode($doc, "h5");
self::deleteNode($doc, "h6");
self::deleteNode($doc, "ol");
self::deleteNode($doc, "ul");
$xpath = new \DomXPath($doc);
$list = $xpath->query("//meta[@content]");
foreach ($list as $node) {
$attr = array();
if ($node->attributes->length) {
foreach ($node->attributes as $attribute) {
$attr[$attribute->name] = $attribute->value;
}
}
if (@$attr["http-equiv"] == "refresh") {
$path = $attr["content"];
$pathinfo = explode(";", $path);
$content = "";
foreach ($pathinfo as $value) {
if (substr(strtolower($value), 0, 4) == "url=") {
$content = substr($value, 4);
}
}
if ($content != "") {
$siteinfo = self::getSiteinfo($content, $no_guessing, $do_oembed, ++$count);
return($siteinfo);
}
}
}
$list = $xpath->query("//title");
if ($list->length > 0) {
$siteinfo["title"] = $list->item(0)->nodeValue;
}
//$list = $xpath->query("head/meta[@name]");
$list = $xpath->query("//meta[@name]");
foreach ($list as $node) {
$attr = array();
if ($node->attributes->length) {
foreach ($node->attributes as $attribute) {
$attr[$attribute->name] = $attribute->value;
}
}
$attr["content"] = trim(html_entity_decode($attr["content"], ENT_QUOTES, "UTF-8"));
if ($attr["content"] != "") {
switch (strtolower($attr["name"])) {
case "fulltitle":
$siteinfo["title"] = $attr["content"];
break;
case "description":
$siteinfo["text"] = $attr["content"];
break;
case "thumbnail":
$siteinfo["image"] = $attr["content"];
break;
case "twitter:image":
$siteinfo["image"] = $attr["content"];
break;
case "twitter:image:src":
$siteinfo["image"] = $attr["content"];
break;
case "twitter:card":
if (($siteinfo["type"] == "") || ($attr["content"] == "photo")) {
$siteinfo["type"] = $attr["content"];
}
break;
case "twitter:description":
$siteinfo["text"] = $attr["content"];
break;
case "twitter:title":
$siteinfo["title"] = $attr["content"];
break;
case "dc.title":
$siteinfo["title"] = $attr["content"];
break;
case "dc.description":
$siteinfo["text"] = $attr["content"];
break;
case "keywords":
$keywords = explode(",", $attr["content"]);
break;
case "news_keywords":
$keywords = explode(",", $attr["content"]);
break;
}
}
if ($siteinfo["type"] == "summary") {
$siteinfo["type"] = "link";
}
}
if (isset($keywords)) {
$siteinfo["keywords"] = array();
foreach ($keywords as $keyword) {
if (!in_array(trim($keyword), $siteinfo["keywords"])) {
$siteinfo["keywords"][] = trim($keyword);
}
}
}
//$list = $xpath->query("head/meta[@property]");
$list = $xpath->query("//meta[@property]");
foreach ($list as $node) {
$attr = array();
if ($node->attributes->length) {
foreach ($node->attributes as $attribute) {
$attr[$attribute->name] = $attribute->value;
}
}
$attr["content"] = trim(html_entity_decode($attr["content"], ENT_QUOTES, "UTF-8"));
if ($attr["content"] != "") {
switch (strtolower($attr["property"])) {
case "og:image":
$siteinfo["image"] = $attr["content"];
break;
case "og:title":
$siteinfo["title"] = $attr["content"];
break;
case "og:description":
$siteinfo["text"] = $attr["content"];
break;
}
}
}
if ((@$siteinfo["image"] == "") && !$no_guessing) {
$list = $xpath->query("//img[@src]");
foreach ($list as $node) {
$attr = array();
if ($node->attributes->length) {
foreach ($node->attributes as $attribute) {
$attr[$attribute->name] = $attribute->value;
}
}
$src = self::completeUrl($attr["src"], $url);
$photodata = get_photo_info($src);
if (($photodata) && ($photodata[0] > 150) && ($photodata[1] > 150)) {
if ($photodata[0] > 300) {
$photodata[1] = round($photodata[1] * (300 / $photodata[0]));
$photodata[0] = 300;
}
if ($photodata[1] > 300) {
$photodata[0] = round($photodata[0] * (300 / $photodata[1]));
$photodata[1] = 300;
}
$siteinfo["images"][] = array("src" => $src,
"width" => $photodata[0],
"height" => $photodata[1]);
}
}
} elseif ($siteinfo["image"] != "") {
$src = self::completeUrl($siteinfo["image"], $url);
unset($siteinfo["image"]);
$photodata = get_photo_info($src);
if (($photodata) && ($photodata[0] > 10) && ($photodata[1] > 10)) {
$siteinfo["images"][] = array("src" => $src,
"width" => $photodata[0],
"height" => $photodata[1]);
}
}
if ((@$siteinfo["text"] == "") && (@$siteinfo["title"] != "") && !$no_guessing) {
$text = "";
$list = $xpath->query("//div[@class='article']");
foreach ($list as $node) {
if (strlen($node->nodeValue) > 40) {
$text .= " ".trim($node->nodeValue);
}
}
if ($text == "") {
$list = $xpath->query("//div[@class='content']");
foreach ($list as $node) {
if (strlen($node->nodeValue) > 40) {
$text .= " ".trim($node->nodeValue);
}
}
}
// If none text was found then take the paragraph content
if ($text == "") {
$list = $xpath->query("//p");
foreach ($list as $node) {
if (strlen($node->nodeValue) > 40) {
$text .= " ".trim($node->nodeValue);
}
}
}
if ($text != "") {
$text = trim(str_replace(array("\n", "\r"), array(" ", " "), $text));
while (strpos($text, " ")) {
$text = trim(str_replace(" ", " ", $text));
}
$siteinfo["text"] = trim(html_entity_decode(substr($text, 0, 350), ENT_QUOTES, "UTF-8").'...');
}
}
logger("parseurl_getsiteinfo: Siteinfo for ".$url." ".print_r($siteinfo, true), LOGGER_DEBUG);
call_hooks("getsiteinfo", $siteinfo);
return($siteinfo);
}
/**
* @brief Convert tags from CSV to an array
*
* @param string $string Tags
* @return array with formatted Hashtags
*/
public static function convertTagsToArray($string) {
$arr_tags = str_getcsv($string);
if (count($arr_tags)) {
// add the # sign to every tag
array_walk($arr_tags, array("self", "arrAddHashes"));
return $arr_tags;
}
}
/**
* @brief Add a hasht sign to a string
*
* This method is used as callback function
*
* @param string $tag The pure tag name
* @param int $k Counter for internal use
*/
private static function arrAddHashes(&$tag, $k) {
$tag = "#" . $tag;
}
private static function deleteNode(&$doc, $node) {
$xpath = new \DomXPath($doc);
$list = $xpath->query("//".$node);
foreach ($list as $child) {
$child->parentNode->removeChild($child);
}
}
private static function completeUrl($url, $scheme) {
$urlarr = parse_url($url);
if (isset($urlarr["scheme"])) {
return($url);
}
$schemearr = parse_url($scheme);
$complete = $schemearr["scheme"]."://".$schemearr["host"];
if (@$schemearr["port"] != "") {
$complete .= ":".$schemearr["port"];
}
if (strpos($urlarr["path"],"/") !== 0) {
$complete .= "/";
}
$complete .= $urlarr["path"];
if (@$urlarr["query"] != "") {
$complete .= "?".$urlarr["query"];
}
if (@$urlarr["fragment"] != "") {
$complete .= "#".$urlarr["fragment"];
}
return($complete);
}
}
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