- /**
- * Curl wrapper
- *
- * If binary flag is true, return binary results.
- * Set the cookiejar argument to a string (e.g. "/tmp/friendica-cookies.txt")
- * to preserve cookies from one request to the next.
- *
- * @brief Curl wrapper
- * @param string $url URL to fetch
- * @param boolean $binary default false
- * TRUE if asked to return binary results (file download)
- * @param integer $redirects The recursion counter for internal use - default 0
- * @param integer $timeout Timeout in seconds, default system config value or 60 seconds
- * @param string $accept_content supply Accept: header with 'accept_content' as the value
- * @param string $cookiejar Path to cookie jar file
- *
- * @return string The fetched content
- * @throws \Friendica\Network\HTTPException\InternalServerErrorException
- */
- public static function fetchUrl($url, $binary = false, &$redirects = 0, $timeout = 0, $accept_content = null, $cookiejar = '')
- {
- $ret = self::fetchUrlFull($url, $binary, $redirects, $timeout, $accept_content, $cookiejar);
-
- return $ret->getBody();
- }
-
- /**
- * Curl wrapper with array of return values.
- *
- * Inner workings and parameters are the same as @ref fetchUrl but returns an array with
- * all the information collected during the fetch.
- *
- * @brief Curl wrapper with array of return values.
- * @param string $url URL to fetch
- * @param boolean $binary default false
- * TRUE if asked to return binary results (file download)
- * @param integer $redirects The recursion counter for internal use - default 0
- * @param integer $timeout Timeout in seconds, default system config value or 60 seconds
- * @param string $accept_content supply Accept: header with 'accept_content' as the value
- * @param string $cookiejar Path to cookie jar file
- *
- * @return CurlResult With all relevant information, 'body' contains the actual fetched content.
- * @throws \Friendica\Network\HTTPException\InternalServerErrorException
- */
- public static function fetchUrlFull($url, $binary = false, &$redirects = 0, $timeout = 0, $accept_content = null, $cookiejar = '')
- {
- return self::curl(
- $url,
- $binary,
- $redirects,
- ['timeout'=>$timeout,
- 'accept_content'=>$accept_content,
- 'cookiejar'=>$cookiejar
- ]
- );
- }
-
- /**
- * @brief fetches an URL.
- *
- * @param string $url URL to fetch
- * @param boolean $binary default false
- * TRUE if asked to return binary results (file download)
- * @param int $redirects The recursion counter for internal use - default 0
- * @param array $opts (optional parameters) assoziative array with:
- * 'accept_content' => supply Accept: header with 'accept_content' as the value
- * 'timeout' => int Timeout in seconds, default system config value or 60 seconds
- * 'http_auth' => username:password
- * 'novalidate' => do not validate SSL certs, default is to validate using our CA list
- * 'nobody' => only return the header
- * 'cookiejar' => path to cookie jar file
- * 'header' => header array
- *
- * @return CurlResult
- * @throws \Friendica\Network\HTTPException\InternalServerErrorException
- */
- public static function curl($url, $binary = false, &$redirects = 0, $opts = [])
- {
- $stamp1 = microtime(true);
-
- $a = \get_app();
-
- if (strlen($url) > 1000) {
- Logger::log('URL is longer than 1000 characters. Callstack: ' . System::callstack(20), Logger::DEBUG);
- return CurlResult::createErrorCurl(substr($url, 0, 200));
- }
-
- $parts2 = [];
- $parts = parse_url($url);
- $path_parts = explode('/', defaults($parts, 'path', ''));
- foreach ($path_parts as $part) {
- if (strlen($part) <> mb_strlen($part)) {
- $parts2[] = rawurlencode($part);
- } else {
- $parts2[] = $part;
- }
- }
- $parts['path'] = implode('/', $parts2);
- $url = self::unparseURL($parts);
-
- if (self::isUrlBlocked($url)) {
- Logger::log('domain of ' . $url . ' is blocked', Logger::DATA);
- return CurlResult::createErrorCurl($url);
- }
-
- $ch = @curl_init($url);
-
- if (($redirects > 8) || (!$ch)) {
- return CurlResult::createErrorCurl($url);
- }
-
- @curl_setopt($ch, CURLOPT_HEADER, true);
-
- if (!empty($opts['cookiejar'])) {
- curl_setopt($ch, CURLOPT_COOKIEJAR, $opts["cookiejar"]);
- curl_setopt($ch, CURLOPT_COOKIEFILE, $opts["cookiejar"]);
- }
-
- // These settings aren't needed. We're following the location already.
- // @curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
- // @curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
-
- if (!empty($opts['accept_content'])) {
- curl_setopt(
- $ch,
- CURLOPT_HTTPHEADER,
- ['Accept: ' . $opts['accept_content']]
- );
- }
-
- if (!empty($opts['header'])) {
- curl_setopt($ch, CURLOPT_HTTPHEADER, $opts['header']);
- }
-
- @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
- @curl_setopt($ch, CURLOPT_USERAGENT, $a->getUserAgent());
-
- $range = intval(Config::get('system', 'curl_range_bytes', 0));
-
- if ($range > 0) {
- @curl_setopt($ch, CURLOPT_RANGE, '0-' . $range);
- }
-
- // Without this setting it seems as if some webservers send compressed content
- // This seems to confuse curl so that it shows this uncompressed.
- /// @todo We could possibly set this value to "gzip" or something similar
- curl_setopt($ch, CURLOPT_ENCODING, '');
-
- if (!empty($opts['headers'])) {
- @curl_setopt($ch, CURLOPT_HTTPHEADER, $opts['headers']);
- }
-
- if (!empty($opts['nobody'])) {
- @curl_setopt($ch, CURLOPT_NOBODY, $opts['nobody']);
- }
-
- if (!empty($opts['timeout'])) {
- @curl_setopt($ch, CURLOPT_TIMEOUT, $opts['timeout']);
- } else {
- $curl_time = Config::get('system', 'curl_timeout', 60);
- @curl_setopt($ch, CURLOPT_TIMEOUT, intval($curl_time));
- }
-
- // by default we will allow self-signed certs
- // but you can override this
-
- $check_cert = Config::get('system', 'verifyssl');
- @curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
-
- if ($check_cert) {
- @curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
- }
-
- $proxy = Config::get('system', 'proxy');
-
- if (strlen($proxy)) {
- @curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
- @curl_setopt($ch, CURLOPT_PROXY, $proxy);
- $proxyuser = @Config::get('system', 'proxyuser');
-
- if (strlen($proxyuser)) {
- @curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyuser);
- }
- }
-
- if (Config::get('system', 'ipv4_resolve', false)) {
- curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
- }
-
- if ($binary) {
- @curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
- }
-
- // don't let curl abort the entire application
- // if it throws any errors.
-
- $s = @curl_exec($ch);
- $curl_info = @curl_getinfo($ch);
-
- // Special treatment for HTTP Code 416
- // See https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/416
- if (($curl_info['http_code'] == 416) && ($range > 0)) {
- @curl_setopt($ch, CURLOPT_RANGE, '');
- $s = @curl_exec($ch);
- $curl_info = @curl_getinfo($ch);
- }
-
- $curlResponse = new CurlResult($url, $s, $curl_info, curl_errno($ch), curl_error($ch));
-
- if ($curlResponse->isRedirectUrl()) {
- $redirects++;
- Logger::log('curl: redirect ' . $url . ' to ' . $curlResponse->getRedirectUrl());
- @curl_close($ch);
- return self::curl($curlResponse->getRedirectUrl(), $binary, $redirects, $opts);
- }
-
- @curl_close($ch);
-
- $a->getProfiler()->saveTimestamp($stamp1, 'network', System::callstack());
-
- return $curlResponse;
- }