489 lines
13 KiB
PHP
489 lines
13 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2020, Friendica
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*
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* @license GNU APGL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Network;
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use DOMDocument;
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use DomXPath;
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use Friendica\App;
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use Friendica\Core\Config\IConfig;
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use Friendica\Core\System;
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use Friendica\Util\Network;
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use Friendica\Util\Profiler;
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use Psr\Log\LoggerInterface;
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/**
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* Performs HTTP requests to a given URL
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*/
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class HTTPRequest implements IHTTPRequest
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{
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/** @var LoggerInterface */
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private $logger;
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/** @var Profiler */
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private $profiler;
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/** @var IConfig */
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private $config;
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/** @var string */
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private $baseUrl;
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public function __construct(LoggerInterface $logger, Profiler $profiler, IConfig $config, App\BaseURL $baseUrl)
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{
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$this->logger = $logger;
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$this->profiler = $profiler;
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$this->config = $config;
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$this->baseUrl = $baseUrl->get();
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}
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/** {@inheritDoc}
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*
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* @throws HTTPException\InternalServerErrorException
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*/
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public function head(string $url, array $opts = [])
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{
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$opts['nobody'] = true;
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return $this->get($url, $opts);
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}
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/**
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* {@inheritDoc}
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*
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* @param int $redirects The recursion counter for internal use - default 0
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*
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public function get(string $url, array $opts = [], int &$redirects = 0)
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{
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$stamp1 = microtime(true);
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if (strlen($url) > 1000) {
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$this->logger->debug('URL is longer than 1000 characters.', ['url' => $url, 'callstack' => System::callstack(20)]);
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$this->profiler->saveTimestamp($stamp1, 'network');
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return CurlResult::createErrorCurl(substr($url, 0, 200));
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}
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$parts2 = [];
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$parts = parse_url($url);
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$path_parts = explode('/', $parts['path'] ?? '');
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foreach ($path_parts as $part) {
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if (strlen($part) <> mb_strlen($part)) {
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$parts2[] = rawurlencode($part);
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} else {
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$parts2[] = $part;
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}
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}
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$parts['path'] = implode('/', $parts2);
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$url = Network::unparseURL($parts);
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if (Network::isUrlBlocked($url)) {
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$this->logger->info('Domain is blocked.', ['url' => $url]);
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$this->profiler->saveTimestamp($stamp1, 'network');
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return CurlResult::createErrorCurl($url);
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}
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$ch = @curl_init($url);
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if (($redirects > 8) || (!$ch)) {
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$this->profiler->saveTimestamp($stamp1, 'network');
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return CurlResult::createErrorCurl($url);
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}
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@curl_setopt($ch, CURLOPT_HEADER, true);
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if (!empty($opts['cookiejar'])) {
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curl_setopt($ch, CURLOPT_COOKIEJAR, $opts["cookiejar"]);
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curl_setopt($ch, CURLOPT_COOKIEFILE, $opts["cookiejar"]);
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}
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// These settings aren't needed. We're following the location already.
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// @curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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// @curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
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if (!empty($opts['accept_content'])) {
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curl_setopt(
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$ch,
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CURLOPT_HTTPHEADER,
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['Accept: ' . $opts['accept_content']]
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);
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}
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if (!empty($opts['header'])) {
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curl_setopt($ch, CURLOPT_HTTPHEADER, $opts['header']);
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}
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@curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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@curl_setopt($ch, CURLOPT_USERAGENT, $this->getUserAgent());
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$range = intval($this->config->get('system', 'curl_range_bytes', 0));
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if ($range > 0) {
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@curl_setopt($ch, CURLOPT_RANGE, '0-' . $range);
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}
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// Without this setting it seems as if some webservers send compressed content
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// This seems to confuse curl so that it shows this uncompressed.
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/// @todo We could possibly set this value to "gzip" or something similar
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curl_setopt($ch, CURLOPT_ENCODING, '');
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if (!empty($opts['headers'])) {
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$this->logger->notice('Wrong option \'headers\' used.');
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@curl_setopt($ch, CURLOPT_HTTPHEADER, $opts['headers']);
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}
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if (!empty($opts['nobody'])) {
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@curl_setopt($ch, CURLOPT_NOBODY, $opts['nobody']);
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}
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@curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
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if (!empty($opts['timeout'])) {
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@curl_setopt($ch, CURLOPT_TIMEOUT, $opts['timeout']);
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} else {
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$curl_time = $this->config->get('system', 'curl_timeout', 60);
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@curl_setopt($ch, CURLOPT_TIMEOUT, intval($curl_time));
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}
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// by default we will allow self-signed certs
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// but you can override this
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$check_cert = $this->config->get('system', 'verifyssl');
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@curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
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if ($check_cert) {
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@curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
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}
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$proxy = $this->config->get('system', 'proxy');
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if (!empty($proxy)) {
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@curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
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@curl_setopt($ch, CURLOPT_PROXY, $proxy);
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$proxyuser = $this->config->get('system', 'proxyuser');
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if (!empty($proxyuser)) {
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@curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyuser);
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}
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}
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if ($this->config->get('system', 'ipv4_resolve', false)) {
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curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
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}
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$s = @curl_exec($ch);
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$curl_info = @curl_getinfo($ch);
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// Special treatment for HTTP Code 416
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// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/416
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if (($curl_info['http_code'] == 416) && ($range > 0)) {
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@curl_setopt($ch, CURLOPT_RANGE, '');
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$s = @curl_exec($ch);
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$curl_info = @curl_getinfo($ch);
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}
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$curlResponse = new CurlResult($url, $s, $curl_info, curl_errno($ch), curl_error($ch));
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if (!Network::isRedirectBlocked($url) && $curlResponse->isRedirectUrl()) {
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$redirects++;
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$this->logger->notice('Curl redirect.', ['url' => $url, 'to' => $curlResponse->getRedirectUrl()]);
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@curl_close($ch);
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$this->profiler->saveTimestamp($stamp1, 'network');
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return $this->get($curlResponse->getRedirectUrl(), $opts, $redirects);
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}
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@curl_close($ch);
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$this->profiler->saveTimestamp($stamp1, 'network');
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return $curlResponse;
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}
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/**
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* {@inheritDoc}
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*
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* @param int $redirects The recursion counter for internal use - default 0
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*
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public function post(string $url, $params, array $headers = [], int $timeout = 0, int &$redirects = 0)
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{
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$stamp1 = microtime(true);
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if (Network::isUrlBlocked($url)) {
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$this->logger->info('Domain is blocked.' . ['url' => $url]);
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$this->profiler->saveTimestamp($stamp1, 'network');
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return CurlResult::createErrorCurl($url);
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}
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$ch = curl_init($url);
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if (($redirects > 8) || (!$ch)) {
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$this->profiler->saveTimestamp($stamp1, 'network');
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return CurlResult::createErrorCurl($url);
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}
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$this->logger->debug('Post_url: start.', ['url' => $url]);
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curl_setopt($ch, CURLOPT_HEADER, true);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_POST, 1);
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curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
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curl_setopt($ch, CURLOPT_USERAGENT, $this->getUserAgent());
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if ($this->config->get('system', 'ipv4_resolve', false)) {
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curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
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}
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@curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
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if (intval($timeout)) {
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curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
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} else {
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$curl_time = $this->config->get('system', 'curl_timeout', 60);
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curl_setopt($ch, CURLOPT_TIMEOUT, intval($curl_time));
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}
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if (!empty($headers)) {
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curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
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}
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$check_cert = $this->config->get('system', 'verifyssl');
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
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if ($check_cert) {
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@curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
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}
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$proxy = $this->config->get('system', 'proxy');
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if (!empty($proxy)) {
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curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
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curl_setopt($ch, CURLOPT_PROXY, $proxy);
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$proxyuser = $this->config->get('system', 'proxyuser');
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if (!empty($proxyuser)) {
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curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyuser);
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}
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}
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// don't let curl abort the entire application
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// if it throws any errors.
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$s = @curl_exec($ch);
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$curl_info = curl_getinfo($ch);
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$curlResponse = new CurlResult($url, $s, $curl_info, curl_errno($ch), curl_error($ch));
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if (!Network::isRedirectBlocked($url) && $curlResponse->isRedirectUrl()) {
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$redirects++;
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$this->logger->info('Post redirect.', ['url' => $url, 'to' => $curlResponse->getRedirectUrl()]);
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curl_close($ch);
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$this->profiler->saveTimestamp($stamp1, 'network');
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return $this->post($curlResponse->getRedirectUrl(), $params, $headers, $redirects, $timeout);
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}
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curl_close($ch);
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$this->profiler->saveTimestamp($stamp1, 'network');
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// Very old versions of Lighttpd don't like the "Expect" header, so we remove it when needed
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if ($curlResponse->getReturnCode() == 417) {
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$redirects++;
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if (empty($headers)) {
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$headers = ['Expect:'];
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} else {
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if (!in_array('Expect:', $headers)) {
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array_push($headers, 'Expect:');
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}
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}
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$this->logger->info('Server responds with 417, applying workaround', ['url' => $url]);
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return $this->post($url, $params, $headers, $redirects, $timeout);
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}
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$this->logger->debug('Post_url: End.', ['url' => $url]);
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return $curlResponse;
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}
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/**
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* {@inheritDoc}
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*/
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public function finalUrl(string $url, int $depth = 1, bool $fetchbody = false)
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{
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if (Network::isUrlBlocked($url)) {
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$this->logger->info('Domain is blocked.', ['url' => $url]);
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return $url;
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}
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if (Network::isRedirectBlocked($url)) {
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$this->logger->info('Domain should not be redirected.', ['url' => $url]);
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return $url;
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}
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$url = Network::stripTrackingQueryParams($url);
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if ($depth > 10) {
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return $url;
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}
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$url = trim($url, "'");
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$stamp1 = microtime(true);
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_HEADER, 1);
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curl_setopt($ch, CURLOPT_NOBODY, 1);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
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curl_setopt($ch, CURLOPT_TIMEOUT, 10);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_USERAGENT, $this->getUserAgent());
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curl_exec($ch);
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$curl_info = @curl_getinfo($ch);
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$http_code = $curl_info['http_code'];
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curl_close($ch);
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$this->profiler->saveTimestamp($stamp1, "network");
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if ($http_code == 0) {
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return $url;
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}
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if (in_array($http_code, ['301', '302'])) {
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if (!empty($curl_info['redirect_url'])) {
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return $this->finalUrl($curl_info['redirect_url'], ++$depth, $fetchbody);
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} elseif (!empty($curl_info['location'])) {
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return $this->finalUrl($curl_info['location'], ++$depth, $fetchbody);
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}
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}
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// Check for redirects in the meta elements of the body if there are no redirects in the header.
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if (!$fetchbody) {
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return $this->finalUrl($url, ++$depth, true);
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}
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// if the file is too large then exit
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if ($curl_info["download_content_length"] > 1000000) {
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return $url;
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}
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// if it isn't a HTML file then exit
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if (!empty($curl_info["content_type"]) && !strstr(strtolower($curl_info["content_type"]), "html")) {
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return $url;
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}
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$stamp1 = microtime(true);
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_HEADER, 0);
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curl_setopt($ch, CURLOPT_NOBODY, 0);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
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curl_setopt($ch, CURLOPT_TIMEOUT, 10);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_USERAGENT, $this->getUserAgent());
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$body = curl_exec($ch);
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curl_close($ch);
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$this->profiler->saveTimestamp($stamp1, "network");
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if (trim($body) == "") {
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return $url;
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}
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// Check for redirect in meta elements
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$doc = new DOMDocument();
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@$doc->loadHTML($body);
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$xpath = new DomXPath($doc);
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$list = $xpath->query("//meta[@content]");
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foreach ($list as $node) {
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$attr = [];
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if ($node->attributes->length) {
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foreach ($node->attributes as $attribute) {
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$attr[$attribute->name] = $attribute->value;
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}
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}
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if (@$attr["http-equiv"] == 'refresh') {
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$path = $attr["content"];
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$pathinfo = explode(";", $path);
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foreach ($pathinfo as $value) {
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if (substr(strtolower($value), 0, 4) == "url=") {
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return $this->finalUrl(substr($value, 4), ++$depth);
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}
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}
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}
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}
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return $url;
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}
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/**
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* {@inheritDoc}
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*
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* @param int $redirects The recursion counter for internal use - default 0
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*
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public function fetch(string $url, int $timeout = 0, string $accept_content = '', string $cookiejar = '', int &$redirects = 0)
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{
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$ret = $this->fetchFull($url, $timeout, $accept_content, $cookiejar, $redirects);
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return $ret->getBody();
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}
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/**
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* {@inheritDoc}
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*
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* @param int $redirects The recursion counter for internal use - default 0
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*
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public function fetchFull(string $url, int $timeout = 0, string $accept_content = '', string $cookiejar = '', int &$redirects = 0)
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{
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return $this->get(
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$url,
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[
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'timeout' => $timeout,
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'accept_content' => $accept_content,
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'cookiejar' => $cookiejar
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],
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$redirects
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);
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}
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/**
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* {@inheritDoc}
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*/
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public function getUserAgent()
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{
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return
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FRIENDICA_PLATFORM . " '" .
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FRIENDICA_CODENAME . "' " .
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FRIENDICA_VERSION . '-' .
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DB_UPDATE_VERSION . '; ' .
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$this->baseUrl;
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}
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}
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