133 lines
3.2 KiB
PHP
133 lines
3.2 KiB
PHP
<?php
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function getContents($url,
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$use_include_path = false,
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$context = null,
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$offset = 0,
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$maxlen = null){
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$contextOptions = array(
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'http' => array(
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'user_agent' => ini_get('user_agent'),
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'accept_encoding' => 'gzip'
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)
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);
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if(defined('PROXY_URL') && !defined('NOPROXY')){
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$contextOptions['http']['proxy'] = PROXY_URL;
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$contextOptions['http']['request_fulluri'] = true;
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if(is_null($context)){
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$context = stream_context_create($contextOptions);
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} else {
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$prevContext = $context;
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if(!stream_context_set_option($context, $contextOptions)){
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$context = $prevContext;
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}
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}
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}
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if(is_null($maxlen)){
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$content = file_get_contents($url, $use_include_path, $context, $offset);
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} else {
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$content = file_get_contents($url, $use_include_path, $context, $offset, $maxlen);
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}
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if($content === false)
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debugMessage('Cant\'t download ' . $url);
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// handle compressed data
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foreach($http_response_header as $header){
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if(stristr($header, 'content-encoding')){
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switch(true){
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case stristr($header, 'gzip'):
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$content = gzinflate(substr($content, 10, -8));
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break;
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case stristr($header, 'compress'):
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//TODO
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case stristr($header, 'deflate'):
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//TODO
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case stristr($header, 'brotli'):
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//TODO
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returnServerError($header . '=> Not implemented yet');
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break;
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case stristr($header, 'identity'):
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break;
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default:
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returnServerError($header . '=> Unknown compression');
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}
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}
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}
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return $content;
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}
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function getSimpleHTMLDOM($url,
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$use_include_path = false,
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$context = null,
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$offset = 0,
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$maxLen = null,
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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, $use_include_path, $context, $offset, $maxLen);
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return str_get_html($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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$use_include_path = false,
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$context = null,
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$offset = 0,
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$maxLen = null,
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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, $use_include_path, $context, $offset, $maxLen);
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if($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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