mirror of
https://github.com/RSS-Bridge/rss-bridge.git
synced 2024-11-25 19:06:23 +03:00
422 lines
13 KiB
PHP
422 lines
13 KiB
PHP
<?php
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final class HttpException extends \Exception
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{
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}
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// todo: move this somewhere useful, possibly into a function
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const RSSBRIDGE_HTTP_STATUS_CODES = [
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'100' => 'Continue',
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'101' => 'Switching Protocols',
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'200' => 'OK',
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'201' => 'Created',
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'202' => 'Accepted',
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'203' => 'Non-Authoritative Information',
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'204' => 'No Content',
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'205' => 'Reset Content',
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'206' => 'Partial Content',
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'300' => 'Multiple Choices',
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'302' => 'Found',
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'303' => 'See Other',
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'304' => 'Not Modified',
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'305' => 'Use Proxy',
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'400' => 'Bad Request',
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'401' => 'Unauthorized',
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'402' => 'Payment Required',
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'403' => 'Forbidden',
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'404' => 'Not Found',
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'405' => 'Method Not Allowed',
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'406' => 'Not Acceptable',
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'407' => 'Proxy Authentication Required',
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'408' => 'Request Timeout',
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'409' => 'Conflict',
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'410' => 'Gone',
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'411' => 'Length Required',
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'412' => 'Precondition Failed',
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'413' => 'Request Entity Too Large',
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'414' => 'Request-URI Too Long',
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'415' => 'Unsupported Media Type',
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'416' => 'Requested Range Not Satisfiable',
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'417' => 'Expectation Failed',
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'429' => 'Too Many Requests',
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'500' => 'Internal Server Error',
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'501' => 'Not Implemented',
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'502' => 'Bad Gateway',
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'503' => 'Service Unavailable',
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'504' => 'Gateway Timeout',
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'505' => 'HTTP Version Not Supported'
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];
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/**
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* Fetch data from an http url
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*
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* @param array $httpHeaders E.g. ['Content-type: text/plain']
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* @param array $curlOptions Associative array e.g. [CURLOPT_MAXREDIRS => 3]
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* @param bool $returnFull Whether to return an array:
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* [
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* 'code' => int,
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* 'header' => array,
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* 'content' => string,
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* 'status_lines' => array,
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* ]
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* @return string|array
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*/
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function getContents(
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string $url,
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array $httpHeaders = [],
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array $curlOptions = [],
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bool $returnFull = false
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) {
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$cacheFactory = new CacheFactory();
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$cache = $cacheFactory->create(Configuration::getConfig('cache', 'type'));
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$cache->setScope('server');
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$cache->purgeCache(86400); // 24 hours (forced)
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$cache->setKey([$url]);
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$config = [
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'headers' => $httpHeaders,
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'curl_options' => $curlOptions,
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];
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if (defined('PROXY_URL') && !defined('NOPROXY')) {
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$config['proxy'] = PROXY_URL;
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}
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if (!Debug::isEnabled() && $cache->getTime()) {
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$config['if_not_modified_since'] = $cache->getTime();
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}
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$result = _http_request($url, $config);
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$response = [
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'code' => $result['code'],
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'status_lines' => $result['status_lines'],
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'header' => $result['headers'],
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'content' => $result['body'],
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];
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switch ($result['code']) {
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case 200:
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case 201:
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case 202:
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if (isset($result['headers']['cache-control'])) {
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$cachecontrol = $result['headers']['cache-control'];
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$lastValue = array_pop($cachecontrol);
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$directives = explode(',', $lastValue);
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$directives = array_map('trim', $directives);
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if (in_array('no-cache', $directives) || in_array('no-store', $directives)) {
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// Don't cache as instructed by the server
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break;
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}
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}
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$cache->saveData($result['body']);
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break;
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case 304: // Not Modified
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$response['content'] = $cache->loadData();
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break;
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default:
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throw new HttpException(
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sprintf(
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'%s %s',
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$result['code'],
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RSSBRIDGE_HTTP_STATUS_CODES[$result['code']] ?? ''
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),
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$result['code']
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);
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}
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if ($returnFull === true) {
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return $response;
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}
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return $response['content'];
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}
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/**
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* Private function used internally
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*
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* Fetch content from url
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*
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* @throws HttpException
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*/
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function _http_request(string $url, array $config = []): array
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{
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$defaults = [
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'useragent' => Configuration::getConfig('http', 'useragent'),
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'timeout' => Configuration::getConfig('http', 'timeout'),
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'headers' => [],
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'proxy' => null,
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'curl_options' => [],
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'if_not_modified_since' => null,
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'retries' => 3,
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];
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$config = array_merge($defaults, $config);
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
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curl_setopt($ch, CURLOPT_HEADER, false);
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curl_setopt($ch, CURLOPT_HTTPHEADER, $config['headers']);
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curl_setopt($ch, CURLOPT_USERAGENT, $config['useragent']);
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curl_setopt($ch, CURLOPT_TIMEOUT, $config['timeout']);
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curl_setopt($ch, CURLOPT_ENCODING, '');
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curl_setopt($ch, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
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if ($config['proxy']) {
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curl_setopt($ch, CURLOPT_PROXY, $config['proxy']);
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}
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if (curl_setopt_array($ch, $config['curl_options']) === false) {
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throw new \Exception('Tried to set an illegal curl option');
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}
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if ($config['if_not_modified_since']) {
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curl_setopt($ch, CURLOPT_TIMEVALUE, $config['if_not_modified_since']);
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curl_setopt($ch, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
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}
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$responseStatusLines = [];
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$responseHeaders = [];
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curl_setopt($ch, CURLOPT_HEADERFUNCTION, function ($ch, $rawHeader) use (&$responseHeaders, &$responseStatusLines) {
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$len = strlen($rawHeader);
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if ($rawHeader === "\r\n") {
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return $len;
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}
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if (preg_match('#^HTTP/(2|1.1|1.0)#', $rawHeader)) {
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$responseStatusLines[] = $rawHeader;
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return $len;
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}
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$header = explode(':', $rawHeader);
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if (count($header) === 1) {
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return $len;
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}
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$name = mb_strtolower(trim($header[0]));
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$value = trim(implode(':', array_slice($header, 1)));
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if (!isset($responseHeaders[$name])) {
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$responseHeaders[$name] = [];
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}
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$responseHeaders[$name][] = $value;
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return $len;
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});
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$attempts = 0;
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while (true) {
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$attempts++;
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$data = curl_exec($ch);
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if ($data !== false) {
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// The network call was successful, so break out of the loop
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break;
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}
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if ($attempts > $config['retries']) {
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// Finally give up
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throw new HttpException(sprintf('%s (%s)', curl_error($ch), curl_errno($ch)));
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}
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}
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$statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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return [
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'code' => $statusCode,
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'status_lines' => $responseStatusLines,
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'headers' => $responseHeaders,
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'body' => $data,
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];
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}
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/**
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* Gets contents from the Internet as simplhtmldom object.
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*
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* @param string $url The URL.
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* @param array $header (optional) A list of cURL header.
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* For more information follow the links below.
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* * https://php.net/manual/en/function.curl-setopt.php
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* * https://curl.haxx.se/libcurl/c/CURLOPT_HTTPHEADER.html
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* @param array $opts (optional) A list of cURL options as associative array in
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* the format `$opts[$option] = $value;`, where `$option` is any `CURLOPT_XXX`
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* option and `$value` the corresponding value.
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*
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* For more information see http://php.net/manual/en/function.curl-setopt.php
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* @param bool $lowercase Force all selectors to lowercase.
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* @param bool $forceTagsClosed Forcefully close tags in malformed HTML.
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*
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* _Remarks_: Forcefully closing tags is great for malformed HTML, but it can
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* lead to parsing errors.
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* @param string $target_charset Defines the target charset.
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* @param bool $stripRN Replace all occurrences of `"\r"` and `"\n"` by `" "`.
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* @param string $defaultBRText Specifies the replacement text for `<br>` tags
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* when returning plaintext.
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* @param string $defaultSpanText Specifies the replacement text for `<span />`
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* tags when returning plaintext.
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* @return false|simple_html_dom Contents as simplehtmldom object.
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*/
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function getSimpleHTMLDOM(
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$url,
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$header = [],
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$opts = [],
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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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) {
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$content = getContents(
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$url,
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$header ?? [],
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$opts ?? []
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);
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return str_get_html(
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$content,
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$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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/**
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* Gets contents from the Internet as simplhtmldom object. Contents are cached
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* and re-used for subsequent calls until the cache duration elapsed.
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*
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* _Notice_: Cached contents are forcefully removed after 24 hours (86400 seconds).
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*
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* @param string $url The URL.
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* @param int $duration Cache duration in seconds.
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* @param array $header (optional) A list of cURL header.
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* For more information follow the links below.
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* * https://php.net/manual/en/function.curl-setopt.php
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* * https://curl.haxx.se/libcurl/c/CURLOPT_HTTPHEADER.html
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* @param array $opts (optional) A list of cURL options as associative array in
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* the format `$opts[$option] = $value;`, where `$option` is any `CURLOPT_XXX`
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* option and `$value` the corresponding value.
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*
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* For more information see http://php.net/manual/en/function.curl-setopt.php
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* @param bool $lowercase Force all selectors to lowercase.
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* @param bool $forceTagsClosed Forcefully close tags in malformed HTML.
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*
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* _Remarks_: Forcefully closing tags is great for malformed HTML, but it can
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* lead to parsing errors.
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* @param string $target_charset Defines the target charset.
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* @param bool $stripRN Replace all occurrences of `"\r"` and `"\n"` by `" "`.
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* @param string $defaultBRText Specifies the replacement text for `<br>` tags
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* when returning plaintext.
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* @param string $defaultSpanText Specifies the replacement text for `<span />`
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* tags when returning plaintext.
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* @return false|simple_html_dom Contents as simplehtmldom object.
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*/
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function getSimpleHTMLDOMCached(
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$url,
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$duration = 86400,
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$header = [],
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$opts = [],
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$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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) {
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Debug::log('Caching url ' . $url . ', duration ' . $duration);
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// Initialize cache
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$cacheFac = new CacheFactory();
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$cache = $cacheFac->create(Configuration::getConfig('cache', 'type'));
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$cache->setScope('pages');
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$cache->purgeCache(86400); // 24 hours (forced)
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$params = [$url];
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$cache->setKey($params);
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// Determine if cached file is within duration
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$time = $cache->getTime();
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if (
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$time !== false
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&& (time() - $duration < $time)
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&& !Debug::isEnabled()
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) { // Contents within duration
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$content = $cache->loadData();
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} else { // Content not within duration
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$content = getContents(
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$url,
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$header ?? [],
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$opts ?? []
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);
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if ($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(
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$content,
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$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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/**
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* Determines the MIME type from a URL/Path file extension.
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*
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* _Remarks_:
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*
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* * The built-in functions `mime_content_type` and `fileinfo` require fetching
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* remote contents.
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* * A caller can hint for a MIME type by appending `#.ext` to the URL (i.e. `#.image`).
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*
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* Based on https://stackoverflow.com/a/1147952
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*
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* @param string $url The URL or path to the file.
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* @return string The MIME type of the file.
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*/
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function getMimeType($url)
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{
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static $mime = null;
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if (is_null($mime)) {
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// Default values, overriden by /etc/mime.types when present
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$mime = [
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'jpg' => 'image/jpeg',
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'gif' => 'image/gif',
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'png' => 'image/png',
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'image' => 'image/*',
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'mp3' => 'audio/mpeg',
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];
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// '@' is used to mute open_basedir warning, see issue #818
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if (@is_readable('/etc/mime.types')) {
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$file = fopen('/etc/mime.types', 'r');
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while (($line = fgets($file)) !== false) {
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$line = trim(preg_replace('/#.*/', '', $line));
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if (!$line) {
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continue;
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}
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$parts = preg_split('/\s+/', $line);
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if (count($parts) == 1) {
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continue;
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}
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$type = array_shift($parts);
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foreach ($parts as $part) {
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$mime[$part] = $type;
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}
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}
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fclose($file);
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}
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}
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if (strpos($url, '?') !== false) {
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$url_temp = substr($url, 0, strpos($url, '?'));
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if (strpos($url, '#') !== false) {
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$anchor = substr($url, strpos($url, '#'));
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$url_temp .= $anchor;
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}
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$url = $url_temp;
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}
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$ext = strtolower(pathinfo($url, PATHINFO_EXTENSION));
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if (!empty($mime[$ext])) {
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return $mime[$ext];
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}
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return 'application/octet-stream';
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}
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