381 lines
12 KiB
PHP
381 lines
12 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 Friendica\App;
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use Friendica\Core\Config\IConfig;
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use Friendica\Core\Logger;
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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
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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 $userAgent;
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public function __construct(LoggerInterface $logger, Profiler $profiler, IConfig $config, App $a)
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{
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$this->logger = $logger;
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$this->profiler = $profiler;
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$this->config = $config;
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$this->userAgent = $a->getUserAgent();
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}
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/**
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* fetches an URL.
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*
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* @param string $url URL to fetch
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* @param bool $binary default false
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* TRUE if asked to return binary results (file download)
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* @param array $opts (optional parameters) assoziative array with:
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* 'accept_content' => supply Accept: header with 'accept_content' as the value
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* 'timeout' => int Timeout in seconds, default system config value or 60 seconds
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* 'http_auth' => username:password
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* 'novalidate' => do not validate SSL certs, default is to validate using our CA list
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* 'nobody' => only return the header
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* 'cookiejar' => path to cookie jar file
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* 'header' => header array
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* @param int $redirects The recursion counter for internal use - default 0
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*
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* @return CurlResult
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public function curl(string $url, bool $binary = false, 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' => $url, 'callstack' => System::callstack(20)]);
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return CurlResult::createErrorCurl(substr($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' => $url]);
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return CurlResult::createErrorCurl($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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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, $this->userAgent);
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$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($opts['headers'])) {
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@curl_setopt($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, $opts['nobody']);
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}
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if (!empty($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($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
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}
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if ($binary) {
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@curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
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}
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// don't let curl abort the entire application
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// if it throws any errors.
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$s = @curl_exec($ch);
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$curl_info = @curl_getinfo($ch);
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// Special treatment for HTTP Code 416
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// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/416
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if (($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($ch));
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if ($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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return self::curl($curlResponse->getRedirectUrl(), $binary, $opts, $redirects);
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}
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@curl_close($ch);
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$this->profiler->saveTimestamp($stamp1, 'network', System::callstack());
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return $curlResponse;
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}
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/**
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* Send POST request to $url
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*
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* @param string $url URL to post
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* @param mixed $params array of POST variables
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* @param array $headers HTTP headers
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* @param int $redirects Recursion counter for internal use - default = 0
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* @param int $timeout The timeout in seconds, default system config value or 60 seconds
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*
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* @return CurlResult The content
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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' => $url]);
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return CurlResult::createErrorCurl($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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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, $a->getUserAgent());
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if ($this->config->get('system', 'ipv4_resolve', false)) {
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curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
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}
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if (intval($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($ch));
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if ($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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return self::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', System::callstack());
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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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Logger::info('Server responds with 417, applying workaround', ['url' => $url]);
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return self::post($url, $params, $headers, $redirects, $timeout);
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}
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Logger::log('post_url: end ' . $url, Logger::DATA);
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return $curlResponse;
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}
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/**
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* Curl wrapper
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*
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* If binary flag is true, return binary results.
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* Set the cookiejar argument to a string (e.g. "/tmp/friendica-cookies.txt")
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* to preserve cookies from one request to the next.
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*
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* @param string $url URL to fetch
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* @param bool $binary default false
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* TRUE if asked to return binary results (file download)
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* @param int $timeout Timeout in seconds, default system config value or 60 seconds
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* @param string $accept_content supply Accept: header with 'accept_content' as the value
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* @param string $cookiejar Path to cookie jar file
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* @param int $redirects The recursion counter for internal use - default 0
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*
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* @return string The fetched content
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function fetchUrl(string $url, bool $binary = false, int $timeout = 0, string $accept_content = '', string $cookiejar = '', int &$redirects = 0)
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{
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$ret = self::fetchUrlFull($url, $binary, $timeout, $accept_content, $cookiejar, $redirects);
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return $ret->getBody();
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}
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/**
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* Curl wrapper with array of return values.
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*
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* Inner workings and parameters are the same as @ref fetchUrl but returns an array with
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* all the information collected during the fetch.
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*
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* @param string $url URL to fetch
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* @param bool $binary default false
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* TRUE if asked to return binary results (file download)
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* @param int $timeout Timeout in seconds, default system config value or 60 seconds
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* @param string $accept_content supply Accept: header with 'accept_content' as the value
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* @param string $cookiejar Path to cookie jar file
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* @param int $redirects The recursion counter for internal use - default 0
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*
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* @return CurlResult With all relevant information, 'body' contains the actual fetched content.
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function fetchUrlFull(string $url, bool $binary = false, int $timeout = 0, string $accept_content = '', string $cookiejar = '', int &$redirects = 0)
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{
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return self::curl(
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$url,
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$binary,
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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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