forked from blallo/rss-bridge
154 lines
3.8 KiB
PHP
154 lines
3.8 KiB
PHP
<?php
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function getContents($url, $header = array(), $opts = array()){
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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if(is_array($header) && count($header) !== 0)
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curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
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curl_setopt($ch, CURLOPT_USERAGENT, ini_get('user_agent'));
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curl_setopt($ch, CURLOPT_ENCODING, '');
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curl_setopt($ch, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
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if(is_array($opts)) {
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foreach($opts as $key => $value) {
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curl_setopt($ch, $key, $value);
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}
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}
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if(defined('PROXY_URL') && !defined('NOPROXY')) {
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curl_setopt($ch, CURLOPT_PROXY, PROXY_URL);
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}
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// We always want the resonse header as part of the data!
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curl_setopt($ch, CURLOPT_HEADER, true);
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$data = curl_exec($ch);
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$curlError = curl_error($ch);
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$curlErrno = curl_errno($ch);
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if($data === false)
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debugMessage('Cant\'t download ' . $url . ' cUrl error: ' . $curlError . ' (' . $curlErrno . ')');
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$headerSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
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$header = substr($data, 0, $headerSize);
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$headers = parseResponseHeader($header);
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$finalHeader = end($headers);
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if(array_key_exists('http_code', $finalHeader)
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&& strpos($finalHeader['http_code'], '200') === false
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&& array_key_exists('Server', $finalHeader)
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&& strpos($finalHeader['Server'], 'cloudflare') !== false) {
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returnServerError(<<< EOD
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The server responded with a Cloudflare challenge, which is not supported by RSS-Bridge!<br>
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If this error persists longer than a week, please consider opening an issue on GitHub!
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EOD
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);
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}
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curl_close($ch);
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return substr($data, $headerSize);
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}
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function getSimpleHTMLDOM($url,
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$header = array(),
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$opts = array(),
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$lowercase = true,
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$forceTagsClosed = true,
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$target_charset = DEFAULT_TARGET_CHARSET,
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$stripRN = true,
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$defaultBRText = DEFAULT_BR_TEXT,
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$defaultSpanText = DEFAULT_SPAN_TEXT){
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$content = getContents($url, $header, $opts);
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return str_get_html($content,
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$lowercase,
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$forceTagsClosed,
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$target_charset,
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$stripRN,
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$defaultBRText,
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$defaultSpanText);
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}
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/**
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* Maintain locally cached versions of pages to avoid multiple downloads.
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* @param url url to cache
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* @param duration duration of the cache file in seconds (default: 24h/86400s)
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* @return content of the file as string
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*/
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function getSimpleHTMLDOMCached($url,
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$duration = 86400,
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$header = array(),
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$opts = array(),
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$lowercase = true,
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$forceTagsClosed = true,
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$target_charset = DEFAULT_TARGET_CHARSET,
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$stripRN = true,
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$defaultBRText = DEFAULT_BR_TEXT,
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$defaultSpanText = DEFAULT_SPAN_TEXT){
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debugMessage('Caching url ' . $url . ', duration ' . $duration);
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// Initialize cache
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$cache = Cache::create('FileCache');
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$cache->setPath(CACHE_DIR . '/pages');
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$cache->purgeCache(86400); // 24 hours (forced)
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$params = [$url];
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$cache->setParameters($params);
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// Determine if cached file is within duration
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$time = $cache->getTime();
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if($time !== false
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&& (time() - $duration < $time)
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&& (!defined('DEBUG') || DEBUG !== true)) { // Contents within duration
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$content = $cache->loadData();
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} else { // Content not within duration
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$content = getContents($url, $header, $opts);
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if($content !== false) {
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$cache->saveData($content);
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}
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}
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return str_get_html($content,
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$lowercase,
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$forceTagsClosed,
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$target_charset,
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$stripRN,
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$defaultBRText,
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$defaultSpanText);
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}
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/**
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* Parses the provided response header into an associative array
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*
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* Based on https://stackoverflow.com/a/18682872
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*/
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function parseResponseHeader($header) {
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$headers = array();
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$requests = explode("\r\n\r\n", trim($header));
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foreach ($requests as $request) {
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$header = array();
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foreach (explode("\r\n", $request) as $i => $line) {
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if($i === 0) {
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$header['http_code'] = $line;
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} else {
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list ($key, $value) = explode(': ', $line);
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$header[$key] = $value;
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}
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}
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$headers[] = $header;
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}
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return $headers;
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}
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