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<?php |
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/** |
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* HTTP service client |
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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 General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (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 General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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*/ |
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/** |
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* Class to handle concurrent HTTP requests |
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* |
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* HTTP request maps are arrays that use the following format: |
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* - method : GET/HEAD/PUT/POST/DELETE |
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* - url : HTTP/HTTPS URL |
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* - query : <query parameter field/value associative array> (uses RFC 3986) |
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* - headers : <header name/value associative array> |
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* - body : source to get the HTTP request body from; |
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* this can simply be a string (always), a resource for |
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* PUT requests, and a field/value array for POST request; |
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* array bodies are encoded as multipart/form-data and strings |
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* use application/x-www-form-urlencoded (headers sent automatically) |
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* - stream : resource to stream the HTTP response body to |
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* - proxy : HTTP proxy to use |
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* - flags : map of boolean flags which supports: |
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* - relayResponseHeaders : write out header via header() |
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* Request maps can use integer index 0 instead of 'method' and 1 instead of 'url'. |
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* |
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* @author Aaron Schulz |
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* @since 1.23 |
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*/ |
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class MultiHttpClient { |
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/** @var resource */ |
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protected $multiHandle = null; // curl_multi handle |
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/** @var string|null SSL certificates path */ |
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protected $caBundlePath; |
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/** @var integer */ |
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protected $connTimeout = 10; |
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/** @var integer */ |
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protected $reqTimeout = 300; |
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/** @var bool */ |
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protected $usePipelining = false; |
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/** @var integer */ |
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protected $maxConnsPerHost = 50; |
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/** @var string|null proxy */ |
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protected $proxy; |
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/** @var string */ |
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protected $userAgent = 'wikimedia/multi-http-client v1.0'; |
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/** |
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* @param array $options |
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* - connTimeout : default connection timeout (seconds) |
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* - reqTimeout : default request timeout (seconds) |
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* - proxy : HTTP proxy to use |
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* - usePipelining : whether to use HTTP pipelining if possible (for all hosts) |
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* - maxConnsPerHost : maximum number of concurrent connections (per host) |
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* - userAgent : The User-Agent header value to send |
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* @throws Exception |
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*/ |
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public function __construct( array $options ) { |
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if ( isset( $options['caBundlePath'] ) ) { |
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$this->caBundlePath = $options['caBundlePath']; |
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if ( !file_exists( $this->caBundlePath ) ) { |
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throw new Exception( "Cannot find CA bundle: " . $this->caBundlePath ); |
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} |
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} |
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static $opts = [ |
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'connTimeout', 'reqTimeout', 'usePipelining', 'maxConnsPerHost', 'proxy', 'userAgent' |
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]; |
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foreach ( $opts as $key ) { |
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if ( isset( $options[$key] ) ) { |
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$this->$key = $options[$key]; |
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} |
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} |
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} |
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/** |
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* Execute an HTTP(S) request |
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* |
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* This method returns a response map of: |
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* - code : HTTP response code or 0 if there was a serious cURL error |
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* - reason : HTTP response reason (empty if there was a serious cURL error) |
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* - headers : <header name/value associative array> |
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* - body : HTTP response body or resource (if "stream" was set) |
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* - error : Any cURL error string |
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* The map also stores integer-indexed copies of these values. This lets callers do: |
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* @code |
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* list( $rcode, $rdesc, $rhdrs, $rbody, $rerr ) = $http->run( $req ); |
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* @endcode |
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* @param array $req HTTP request array |
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* @param array $opts |
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* - connTimeout : connection timeout per request (seconds) |
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* - reqTimeout : post-connection timeout per request (seconds) |
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* @return array Response array for request |
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*/ |
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public function run( array $req, array $opts = [] ) { |
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return $this->runMulti( [ $req ], $opts )[0]['response']; |
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} |
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/** |
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* Execute a set of HTTP(S) requests concurrently |
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* |
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* The maps are returned by this method with the 'response' field set to a map of: |
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* - code : HTTP response code or 0 if there was a serious cURL error |
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* - reason : HTTP response reason (empty if there was a serious cURL error) |
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* - headers : <header name/value associative array> |
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* - body : HTTP response body or resource (if "stream" was set) |
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* - error : Any cURL error string |
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* The map also stores integer-indexed copies of these values. This lets callers do: |
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* @code |
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* list( $rcode, $rdesc, $rhdrs, $rbody, $rerr ) = $req['response']; |
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* @endcode |
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* All headers in the 'headers' field are normalized to use lower case names. |
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* This is true for the request headers and the response headers. Integer-indexed |
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* method/URL entries will also be changed to use the corresponding string keys. |
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* |
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* @param array $reqs Map of HTTP request arrays |
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* @param array $opts |
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* - connTimeout : connection timeout per request (seconds) |
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* - reqTimeout : post-connection timeout per request (seconds) |
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* - usePipelining : whether to use HTTP pipelining if possible |
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* - maxConnsPerHost : maximum number of concurrent connections (per host) |
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* @return array $reqs With response array populated for each |
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* @throws Exception |
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*/ |
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public function runMulti( array $reqs, array $opts = [] ) { |
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$chm = $this->getCurlMulti(); |
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// Normalize $reqs and add all of the required cURL handles... |
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$handles = []; |
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foreach ( $reqs as $index => &$req ) { |
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$req['response'] = [ |
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'code' => 0, |
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'reason' => '', |
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'headers' => [], |
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'body' => '', |
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'error' => '' |
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]; |
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if ( isset( $req[0] ) ) { |
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$req['method'] = $req[0]; // short-form |
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unset( $req[0] ); |
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} |
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if ( isset( $req[1] ) ) { |
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$req['url'] = $req[1]; // short-form |
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unset( $req[1] ); |
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} |
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if ( !isset( $req['method'] ) ) { |
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throw new Exception( "Request has no 'method' field set." ); |
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} elseif ( !isset( $req['url'] ) ) { |
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throw new Exception( "Request has no 'url' field set." ); |
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} |
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$req['query'] = isset( $req['query'] ) ? $req['query'] : []; |
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$headers = []; // normalized headers |
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if ( isset( $req['headers'] ) ) { |
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foreach ( $req['headers'] as $name => $value ) { |
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$headers[strtolower( $name )] = $value; |
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} |
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} |
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$req['headers'] = $headers; |
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if ( !isset( $req['body'] ) ) { |
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$req['body'] = ''; |
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$req['headers']['content-length'] = 0; |
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} |
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$req['flags'] = isset( $req['flags'] ) ? $req['flags'] : []; |
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$handles[$index] = $this->getCurlHandle( $req, $opts ); |
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if ( count( $reqs ) > 1 ) { |
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// https://github.com/guzzle/guzzle/issues/349 |
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curl_setopt( $handles[$index], CURLOPT_FORBID_REUSE, true ); |
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} |
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} |
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unset( $req ); // don't assign over this by accident |
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$indexes = array_keys( $reqs ); |
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if ( isset( $opts['usePipelining'] ) ) { |
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curl_multi_setopt( $chm, CURLMOPT_PIPELINING, (int)$opts['usePipelining'] ); |
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} |
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if ( isset( $opts['maxConnsPerHost'] ) ) { |
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// Keep these sockets around as they may be needed later in the request |
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curl_multi_setopt( $chm, CURLMOPT_MAXCONNECTS, (int)$opts['maxConnsPerHost'] ); |
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} |
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// @TODO: use a per-host rolling handle window (e.g. CURLMOPT_MAX_HOST_CONNECTIONS) |
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$batches = array_chunk( $indexes, $this->maxConnsPerHost ); |
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$infos = []; |
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foreach ( $batches as $batch ) { |
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// Attach all cURL handles for this batch |
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foreach ( $batch as $index ) { |
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curl_multi_add_handle( $chm, $handles[$index] ); |
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} |
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// Execute the cURL handles concurrently... |
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$active = null; // handles still being processed |
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do { |
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// Do any available work... |
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do { |
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$mrc = curl_multi_exec( $chm, $active ); |
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$info = curl_multi_info_read( $chm ); |
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if ( $info !== false ) { |
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$infos[(int)$info['handle']] = $info; |
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} |
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} while ( $mrc == CURLM_CALL_MULTI_PERFORM ); |
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// Wait (if possible) for available work... |
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if ( $active > 0 && $mrc == CURLM_OK ) { |
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if ( curl_multi_select( $chm, 10 ) == -1 ) { |
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// PHP bug 63411; https://curl.haxx.se/libcurl/c/curl_multi_fdset.html |
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usleep( 5000 ); // 5ms |
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} |
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} |
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} while ( $active > 0 && $mrc == CURLM_OK ); |
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} |
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// Remove all of the added cURL handles and check for errors... |
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foreach ( $reqs as $index => &$req ) { |
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$ch = $handles[$index]; |
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curl_multi_remove_handle( $chm, $ch ); |
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if ( isset( $infos[(int)$ch] ) ) { |
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$info = $infos[(int)$ch]; |
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$errno = $info['result']; |
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if ( $errno !== 0 ) { |
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$req['response']['error'] = "(curl error: $errno)"; |
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if ( function_exists( 'curl_strerror' ) ) { |
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$req['response']['error'] .= " " . curl_strerror( $errno ); |
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} |
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} |
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} else { |
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$req['response']['error'] = "(curl error: no status set)"; |
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} |
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// For convenience with the list() operator |
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$req['response'][0] = $req['response']['code']; |
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$req['response'][1] = $req['response']['reason']; |
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$req['response'][2] = $req['response']['headers']; |
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$req['response'][3] = $req['response']['body']; |
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$req['response'][4] = $req['response']['error']; |
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curl_close( $ch ); |
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// Close any string wrapper file handles |
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if ( isset( $req['_closeHandle'] ) ) { |
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fclose( $req['_closeHandle'] ); |
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unset( $req['_closeHandle'] ); |
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} |
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} |
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unset( $req ); // don't assign over this by accident |
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// Restore the default settings |
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curl_multi_setopt( $chm, CURLMOPT_PIPELINING, (int)$this->usePipelining ); |
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curl_multi_setopt( $chm, CURLMOPT_MAXCONNECTS, (int)$this->maxConnsPerHost ); |
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return $reqs; |
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} |
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/** |
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* @param array $req HTTP request map |
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* @param array $opts |
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* - connTimeout : default connection timeout |
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* - reqTimeout : default request timeout |
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* @return resource |
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* @throws Exception |
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*/ |
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protected function getCurlHandle( array &$req, array $opts = [] ) { |
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$ch = curl_init(); |
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curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, |
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isset( $opts['connTimeout'] ) ? $opts['connTimeout'] : $this->connTimeout ); |
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curl_setopt( $ch, CURLOPT_PROXY, isset( $req['proxy'] ) ? $req['proxy'] : $this->proxy ); |
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curl_setopt( $ch, CURLOPT_TIMEOUT, |
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isset( $opts['reqTimeout'] ) ? $opts['reqTimeout'] : $this->reqTimeout ); |
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curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, 1 ); |
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curl_setopt( $ch, CURLOPT_MAXREDIRS, 4 ); |
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curl_setopt( $ch, CURLOPT_HEADER, 0 ); |
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if ( !is_null( $this->caBundlePath ) ) { |
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curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, true ); |
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curl_setopt( $ch, CURLOPT_CAINFO, $this->caBundlePath ); |
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} |
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curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 ); |
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$url = $req['url']; |
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$query = http_build_query( $req['query'], '', '&', PHP_QUERY_RFC3986 ); |
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292
|
|
|
if ( $query != '' ) { |
|
293
|
|
|
$url .= strpos( $req['url'], '?' ) === false ? "?$query" : "&$query"; |
|
294
|
|
|
} |
|
295
|
|
|
curl_setopt( $ch, CURLOPT_URL, $url ); |
|
296
|
|
|
|
|
297
|
|
|
curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, $req['method'] ); |
|
298
|
|
|
if ( $req['method'] === 'HEAD' ) { |
|
299
|
|
|
curl_setopt( $ch, CURLOPT_NOBODY, 1 ); |
|
300
|
|
|
} |
|
301
|
|
|
|
|
302
|
|
|
if ( $req['method'] === 'PUT' ) { |
|
303
|
|
|
curl_setopt( $ch, CURLOPT_PUT, 1 ); |
|
304
|
|
|
if ( is_resource( $req['body'] ) ) { |
|
305
|
|
|
curl_setopt( $ch, CURLOPT_INFILE, $req['body'] ); |
|
306
|
|
|
if ( isset( $req['headers']['content-length'] ) ) { |
|
307
|
|
|
curl_setopt( $ch, CURLOPT_INFILESIZE, $req['headers']['content-length'] ); |
|
308
|
|
|
} elseif ( isset( $req['headers']['transfer-encoding'] ) && |
|
309
|
|
|
$req['headers']['transfer-encoding'] === 'chunks' |
|
310
|
|
|
) { |
|
311
|
|
|
curl_setopt( $ch, CURLOPT_UPLOAD, true ); |
|
312
|
|
|
} else { |
|
313
|
|
|
throw new Exception( "Missing 'Content-Length' or 'Transfer-Encoding' header." ); |
|
314
|
|
|
} |
|
315
|
|
|
} elseif ( $req['body'] !== '' ) { |
|
316
|
|
|
$fp = fopen( "php://temp", "wb+" ); |
|
317
|
|
|
fwrite( $fp, $req['body'], strlen( $req['body'] ) ); |
|
318
|
|
|
rewind( $fp ); |
|
319
|
|
|
curl_setopt( $ch, CURLOPT_INFILE, $fp ); |
|
320
|
|
|
curl_setopt( $ch, CURLOPT_INFILESIZE, strlen( $req['body'] ) ); |
|
321
|
|
|
$req['_closeHandle'] = $fp; // remember to close this later |
|
322
|
|
|
} else { |
|
323
|
|
|
curl_setopt( $ch, CURLOPT_INFILESIZE, 0 ); |
|
324
|
|
|
} |
|
325
|
|
|
curl_setopt( $ch, CURLOPT_READFUNCTION, |
|
326
|
|
|
function ( $ch, $fd, $length ) { |
|
327
|
|
|
$data = fread( $fd, $length ); |
|
328
|
|
|
$len = strlen( $data ); |
|
|
|
|
|
|
329
|
|
|
return $data; |
|
330
|
|
|
} |
|
331
|
|
|
); |
|
332
|
|
|
} elseif ( $req['method'] === 'POST' ) { |
|
333
|
|
|
curl_setopt( $ch, CURLOPT_POST, 1 ); |
|
334
|
|
|
// Don't interpret POST parameters starting with '@' as file uploads, because this |
|
335
|
|
|
// makes it impossible to POST plain values starting with '@' (and causes security |
|
336
|
|
|
// issues potentially exposing the contents of local files). |
|
337
|
|
|
// The PHP manual says this option was introduced in PHP 5.5 defaults to true in PHP 5.6, |
|
338
|
|
|
// but we support lower versions, and the option doesn't exist in HHVM 5.6.99. |
|
339
|
|
|
if ( defined( 'CURLOPT_SAFE_UPLOAD' ) ) { |
|
340
|
|
|
curl_setopt( $ch, CURLOPT_SAFE_UPLOAD, true ); |
|
341
|
|
|
} elseif ( is_array( $req['body'] ) ) { |
|
342
|
|
|
// In PHP 5.2 and later, '@' is interpreted as a file upload if POSTFIELDS |
|
343
|
|
|
// is an array, but not if it's a string. So convert $req['body'] to a string |
|
344
|
|
|
// for safety. |
|
345
|
|
|
$req['body'] = http_build_query( $req['body'] ); |
|
346
|
|
|
} |
|
347
|
|
|
curl_setopt( $ch, CURLOPT_POSTFIELDS, $req['body'] ); |
|
348
|
|
|
} else { |
|
349
|
|
|
if ( is_resource( $req['body'] ) || $req['body'] !== '' ) { |
|
350
|
|
|
throw new Exception( "HTTP body specified for a non PUT/POST request." ); |
|
351
|
|
|
} |
|
352
|
|
|
$req['headers']['content-length'] = 0; |
|
353
|
|
|
} |
|
354
|
|
|
|
|
355
|
|
|
if ( !isset( $req['headers']['user-agent'] ) ) { |
|
356
|
|
|
$req['headers']['user-agent'] = $this->userAgent; |
|
357
|
|
|
} |
|
358
|
|
|
|
|
359
|
|
|
$headers = []; |
|
360
|
|
|
foreach ( $req['headers'] as $name => $value ) { |
|
361
|
|
|
if ( strpos( $name, ': ' ) ) { |
|
362
|
|
|
throw new Exception( "Headers cannot have ':' in the name." ); |
|
363
|
|
|
} |
|
364
|
|
|
$headers[] = $name . ': ' . trim( $value ); |
|
365
|
|
|
} |
|
366
|
|
|
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers ); |
|
367
|
|
|
|
|
368
|
|
|
curl_setopt( $ch, CURLOPT_HEADERFUNCTION, |
|
369
|
|
|
function ( $ch, $header ) use ( &$req ) { |
|
370
|
|
|
if ( !empty( $req['flags']['relayResponseHeaders'] ) ) { |
|
371
|
|
|
header( $header ); |
|
372
|
|
|
} |
|
373
|
|
|
$length = strlen( $header ); |
|
374
|
|
|
$matches = []; |
|
375
|
|
|
if ( preg_match( "/^(HTTP\/1\.[01]) (\d{3}) (.*)/", $header, $matches ) ) { |
|
376
|
|
|
$req['response']['code'] = (int)$matches[2]; |
|
377
|
|
|
$req['response']['reason'] = trim( $matches[3] ); |
|
378
|
|
|
return $length; |
|
379
|
|
|
} |
|
380
|
|
|
if ( strpos( $header, ":" ) === false ) { |
|
381
|
|
|
return $length; |
|
382
|
|
|
} |
|
383
|
|
|
list( $name, $value ) = explode( ":", $header, 2 ); |
|
384
|
|
|
$req['response']['headers'][strtolower( $name )] = trim( $value ); |
|
385
|
|
|
return $length; |
|
386
|
|
|
} |
|
387
|
|
|
); |
|
388
|
|
|
|
|
389
|
|
|
if ( isset( $req['stream'] ) ) { |
|
390
|
|
|
// Don't just use CURLOPT_FILE as that might give: |
|
391
|
|
|
// curl_setopt(): cannot represent a stream of type Output as a STDIO FILE* |
|
392
|
|
|
// The callback here handles both normal files and php://temp handles. |
|
393
|
|
|
curl_setopt( $ch, CURLOPT_WRITEFUNCTION, |
|
394
|
|
|
function ( $ch, $data ) use ( &$req ) { |
|
395
|
|
|
return fwrite( $req['stream'], $data ); |
|
396
|
|
|
} |
|
397
|
|
|
); |
|
398
|
|
|
} else { |
|
399
|
|
|
curl_setopt( $ch, CURLOPT_WRITEFUNCTION, |
|
400
|
|
|
function ( $ch, $data ) use ( &$req ) { |
|
401
|
|
|
$req['response']['body'] .= $data; |
|
402
|
|
|
return strlen( $data ); |
|
403
|
|
|
} |
|
404
|
|
|
); |
|
405
|
|
|
} |
|
406
|
|
|
|
|
407
|
|
|
return $ch; |
|
408
|
|
|
} |
|
409
|
|
|
|
|
410
|
|
|
/** |
|
411
|
|
|
* @return resource |
|
412
|
|
|
*/ |
|
413
|
|
|
protected function getCurlMulti() { |
|
414
|
|
|
if ( !$this->multiHandle ) { |
|
415
|
|
|
$cmh = curl_multi_init(); |
|
416
|
|
|
curl_multi_setopt( $cmh, CURLMOPT_PIPELINING, (int)$this->usePipelining ); |
|
417
|
|
|
curl_multi_setopt( $cmh, CURLMOPT_MAXCONNECTS, (int)$this->maxConnsPerHost ); |
|
418
|
|
|
$this->multiHandle = $cmh; |
|
419
|
|
|
} |
|
420
|
|
|
return $this->multiHandle; |
|
421
|
|
|
} |
|
422
|
|
|
|
|
423
|
|
|
function __destruct() { |
|
424
|
|
|
if ( $this->multiHandle ) { |
|
425
|
|
|
curl_multi_close( $this->multiHandle ); |
|
426
|
|
|
} |
|
427
|
|
|
} |
|
428
|
|
|
} |
|
429
|
|
|
|
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.