Rss-Bridge/lib/contents.php

137 lines
3.3 KiB
PHP

<?php
function getContents($url
, $use_include_path = false
, $context = null
, $offset = 0
, $maxlen = null
){
$contextOptions = array(
'http' => array(
'user_agent' => ini_get('user_agent'),
'accept_encoding' => 'gzip'
)
);
if(defined('PROXY_URL') && !defined('NOPROXY')){
$contextOptions['http']['proxy'] = PROXY_URL;
$contextOptions['http']['request_fulluri'] = true;
if(is_null($context)){
$context = stream_context_create($contextOptions);
} else {
$prevContext = $context;
if(!stream_context_set_option($context, $contextOptions)){
$context = $prevContext;
}
}
}
if(is_null($maxlen)){
$content = file_get_contents($url, $use_include_path, $context, $offset);
} else {
$content = file_get_contents($url, $use_include_path, $context, $offset, $maxlen);
}
if($content === false)
debugMessage('Cant\'t download ' . $url);
// handle compressed data
foreach($http_response_header as $header){
if(stristr($header, 'content-encoding')){
switch(true){
case stristr($header, 'gzip'):
$content = gzinflate(substr($content, 10, -8));
break;
case stristr($header, 'compress'):
//TODO
case stristr($header, 'deflate'):
//TODO
case stristr($header, 'brotli'):
//TODO
returnServerError($header . '=> Not implemented yet');
break;
case stristr($header, 'identity'):
break;
default:
returnServerError($header . '=> Unknown compression');
}
}
}
return $content;
}
function getSimpleHTMLDOM($url
, $use_include_path = false
, $context = null
, $offset = 0
, $maxLen = null
, $lowercase = true
, $forceTagsClosed = true
, $target_charset = DEFAULT_TARGET_CHARSET
, $stripRN = true
, $defaultBRText = DEFAULT_BR_TEXT
, $defaultSpanText = DEFAULT_SPAN_TEXT
){
$content = getContents($url, $use_include_path, $context, $offset, $maxLen);
return str_get_html($content
, $lowercase
, $forceTagsClosed
, $target_charset
, $stripRN
, $defaultBRText
, $defaultSpanText);
}
/**
* Maintain locally cached versions of pages to avoid multiple downloads.
* @param url url to cache
* @param duration duration of the cache file in seconds (default: 24h/86400s)
* @return content of the file as string
*/
function getSimpleHTMLDOMCached($url
, $duration = 86400
, $use_include_path = false
, $context = null
, $offset = 0
, $maxLen = null
, $lowercase = true
, $forceTagsClosed = true
, $target_charset = DEFAULT_TARGET_CHARSET
, $stripRN = true
, $defaultBRText = DEFAULT_BR_TEXT
, $defaultSpanText = DEFAULT_SPAN_TEXT
){
debugMessage('Caching url ' . $url . ', duration ' . $duration);
// Initialize cache
$cache = Cache::create('FileCache');
$cache->setPath(CACHE_DIR . '/pages');
$cache->purgeCache(86400); // 24 hours (forced)
$params = [$url];
$cache->setParameters($params);
// Determine if cached file is within duration
$time = $cache->getTime();
if($time !== false
&& (time() - $duration < $time)
&& (!defined('DEBUG') || DEBUG !== true)){ // Contents within duration
$content = $cache->loadData();
} else { // Content not within duration
$content = getContents($url, $use_include_path, $context, $offset, $maxLen);
if($content !== false){
$cache->saveData($content);
}
}
return str_get_html($content
, $lowercase
, $forceTagsClosed
, $target_charset
, $stripRN
, $defaultBRText
, $defaultSpanText);
}
?>