<?php

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/**

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* cURL HTTP transport

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*

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* @package Requests

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* @subpackage Transport

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*/

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/**

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* cURL HTTP transport

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*

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* @package Requests

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* @subpackage Transport

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*/

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class Requests_Transport_cURL implements Requests_Transport {

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const CURL_7_10_5 = 0x070A05;

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const CURL_7_16_2 = 0x071002;

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/**

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* Raw HTTP data

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*

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* @var string

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*/

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public $headers = '';

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/**

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* Raw body data

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*

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* @var string

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*/

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public $response_data = '';

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/**

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* Information on the current request

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*

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* @var array cURL information array, see {@see https://secure.php.net/curl_getinfo}

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*/

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public $info;

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/**

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* Version string

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*

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* @var long

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*/

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public $version;

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/**

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* cURL handle

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*

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* @var resource

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*/

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protected $handle;

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/**

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* Hook dispatcher instance

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*

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* @var Requests_Hooks

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*/

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protected $hooks;

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/**

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* Have we finished the headers yet?

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*

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* @var boolean

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*/

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protected $done_headers = false;

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/**

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* If streaming to a file, keep the file pointer

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*

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* @var resource

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*/

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protected $stream_handle;

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/**

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* How many bytes are in the response body?

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*

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* @var int

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*/

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protected $response_bytes;

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/**

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* What's the maximum number of bytes we should keep?

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*

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* @var int|bool Byte count, or false if no limit.

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*/

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protected $response_byte_limit;

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/**

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* Constructor

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*/

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public function __construct() {

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$curl = curl_version();

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$this->version = $curl['version_number'];

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$this->handle = curl_init();

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curl_setopt($this->handle, CURLOPT_HEADER, false);

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curl_setopt($this->handle, CURLOPT_RETURNTRANSFER, 1);

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if ($this->version >= self::CURL_7_10_5) {

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curl_setopt($this->handle, CURLOPT_ENCODING, '');

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}

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if (defined('CURLOPT_PROTOCOLS')) {

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curl_setopt($this->handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);

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}

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if (defined('CURLOPT_REDIR_PROTOCOLS')) {

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curl_setopt($this->handle, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);

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}

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}

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/**

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* Destructor

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*/

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public function __destruct() {

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if (is_resource($this->handle)) {

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curl_close($this->handle);

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}

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}

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/**

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* Perform a request

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*

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* @throws Requests_Exception On a cURL error (`curlerror`)

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*

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* @param string $url URL to request

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* @param array $headers Associative array of request headers

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* @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD

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* @param array $options Request options, see {@see Requests::response()} for documentation

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* @return string Raw HTTP result

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*/

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public function request($url, $headers = array(), $data = array(), $options = array()) {

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$this->hooks = $options['hooks'];

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$this->setup_handle($url, $headers, $data, $options);

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$options['hooks']->dispatch('curl.before_send', array(&$this->handle));

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if ($options['filename'] !== false) {

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$this->stream_handle = fopen($options['filename'], 'wb');

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}

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$this->response_data = '';

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$this->response_bytes = 0;

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$this->response_byte_limit = false;

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if ($options['max_bytes'] !== false) {

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$this->response_byte_limit = $options['max_bytes'];

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}

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if (isset($options['verify'])) {

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if ($options['verify'] === false) {

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curl_setopt($this->handle, CURLOPT_SSL_VERIFYHOST, 0);

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curl_setopt($this->handle, CURLOPT_SSL_VERIFYPEER, 0);

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}

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elseif (is_string($options['verify'])) {

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curl_setopt($this->handle, CURLOPT_CAINFO, $options['verify']);

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}

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}

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if (isset($options['verifyname']) && $options['verifyname'] === false) {

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curl_setopt($this->handle, CURLOPT_SSL_VERIFYHOST, 0);

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}

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curl_exec($this->handle);

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$response = $this->response_data;

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$options['hooks']->dispatch('curl.after_send', array());

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if (curl_errno($this->handle) === 23 || curl_errno($this->handle) === 61) {

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// Reset encoding and try again

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curl_setopt($this->handle, CURLOPT_ENCODING, 'none');

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$this->response_data = '';

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$this->response_bytes = 0;

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curl_exec($this->handle);

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$response = $this->response_data;

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}

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$this->process_response($response, $options);

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// Need to remove the $this reference from the curl handle.

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// Otherwise Requests_Transport_cURL wont be garbage collected and the curl_close() will never be called.

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curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, null);

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curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, null);

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return $this->headers;

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}

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/**

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* Send multiple requests simultaneously

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*

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* @param array $requests Request data

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* @param array $options Global options

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* @return array Array of Requests_Response objects (may contain Requests_Exception or string responses as well)

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*/

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public function request_multiple($requests, $options) {

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// If you're not requesting, we can't get any responses ¯\_(ツ)_/¯

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if (empty($requests)) {

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return array();

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}

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$multihandle = curl_multi_init();

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$subrequests = array();

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$subhandles = array();

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$class = get_class($this);

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foreach ($requests as $id => $request) {

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$subrequests[$id] = new $class();

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$subhandles[$id] = $subrequests[$id]->get_subrequest_handle($request['url'], $request['headers'], $request['data'], $request['options']);

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$request['options']['hooks']->dispatch('curl.before_multi_add', array(&$subhandles[$id]));

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curl_multi_add_handle($multihandle, $subhandles[$id]);

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}

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$completed = 0;

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$responses = array();

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$request['options']['hooks']->dispatch('curl.before_multi_exec', array(&$multihandle));

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do {

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$active = false;

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do {

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$status = curl_multi_exec($multihandle, $active);

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}

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while ($status === CURLM_CALL_MULTI_PERFORM);

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$to_process = array();

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// Read the information as needed

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while ($done = curl_multi_info_read($multihandle)) {

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$key = array_search($done['handle'], $subhandles, true);

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if (!isset($to_process[$key])) {

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$to_process[$key] = $done;

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}

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}

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// Parse the finished requests before we start getting the new ones

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foreach ($to_process as $key => $done) {

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$options = $requests[$key]['options'];

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if (CURLE_OK !== $done['result']) {

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//get error string for handle.

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$reason = curl_error($done['handle']);

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$exception = new Requests_Exception_Transport_cURL(

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$reason,

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Requests_Exception_Transport_cURL::EASY,

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$done['handle'],

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$done['result']

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);

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$responses[$key] = $exception;

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$options['hooks']->dispatch('transport.internal.parse_error', array(&$responses[$key], $requests[$key]));

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}

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else {

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$responses[$key] = $subrequests[$key]->process_response($subrequests[$key]->response_data, $options);

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$options['hooks']->dispatch('transport.internal.parse_response', array(&$responses[$key], $requests[$key]));

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}

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curl_multi_remove_handle($multihandle, $done['handle']);

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curl_close($done['handle']);

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if (!is_string($responses[$key])) {

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$options['hooks']->dispatch('multiple.request.complete', array(&$responses[$key], $key));

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}

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$completed++;

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}

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}

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while ($active || $completed < count($subrequests));

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$request['options']['hooks']->dispatch('curl.after_multi_exec', array(&$multihandle));

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curl_multi_close($multihandle);

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return $responses;

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}

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/**

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* Get the cURL handle for use in a multi-request

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*

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* @param string $url URL to request

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* @param array $headers Associative array of request headers

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* @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD

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* @param array $options Request options, see {@see Requests::response()} for documentation

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* @return resource Subrequest's cURL handle

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*/

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public function &get_subrequest_handle($url, $headers, $data, $options) {

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$this->setup_handle($url, $headers, $data, $options);

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if ($options['filename'] !== false) {

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$this->stream_handle = fopen($options['filename'], 'wb');

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}

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$this->response_data = '';

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$this->response_bytes = 0;

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$this->response_byte_limit = false;

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if ($options['max_bytes'] !== false) {

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$this->response_byte_limit = $options['max_bytes'];

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}

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$this->hooks = $options['hooks'];

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return $this->handle;

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}

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/**

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* Setup the cURL handle for the given data

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*

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* @param string $url URL to request

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* @param array $headers Associative array of request headers

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* @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD

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* @param array $options Request options, see {@see Requests::response()} for documentation

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*/

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protected function setup_handle($url, $headers, $data, $options) {

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$options['hooks']->dispatch('curl.before_request', array(&$this->handle));

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// Force closing the connection for old versions of cURL (<7.22).

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if ( ! isset( $headers['Connection'] ) ) {

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$headers['Connection'] = 'close';

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}

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$headers = Requests::flatten($headers);

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if (!empty($data)) {

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$data_format = $options['data_format'];

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if ($data_format === 'query') {

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$url = self::format_get($url, $data);

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$data = '';

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}

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elseif (!is_string($data)) {

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$data = http_build_query($data, null, '&');

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}

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}

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switch ($options['type']) {

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case Requests::POST:

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curl_setopt($this->handle, CURLOPT_POST, true);

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curl_setopt($this->handle, CURLOPT_POSTFIELDS, $data);

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break;

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case Requests::HEAD:

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curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);

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curl_setopt($this->handle, CURLOPT_NOBODY, true);

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break;

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case Requests::TRACE:

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curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);

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break;

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case Requests::PATCH:

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case Requests::PUT:

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case Requests::DELETE:

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case Requests::OPTIONS:

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default:

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curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);

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if (!empty($data)) {

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curl_setopt($this->handle, CURLOPT_POSTFIELDS, $data);

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}

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}

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// cURL requires a minimum timeout of 1 second when using the system

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// DNS resolver, as it uses `alarm()`, which is second resolution only.

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// There's no way to detect which DNS resolver is being used from our

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// end, so we need to round up regardless of the supplied timeout.

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//

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// https://github.com/curl/curl/blob/4f45240bc84a9aa648c8f7243be7b79e9f9323a5/lib/hostip.c#L606-L609

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$timeout = max($options['timeout'], 1);

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if (is_int($timeout) || $this->version < self::CURL_7_16_2) {

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curl_setopt($this->handle, CURLOPT_TIMEOUT, ceil($timeout));

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}

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else {

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curl_setopt($this->handle, CURLOPT_TIMEOUT_MS, round($timeout * 1000));

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}

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if (is_int($options['connect_timeout']) || $this->version < self::CURL_7_16_2) {

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curl_setopt($this->handle, CURLOPT_CONNECTTIMEOUT, ceil($options['connect_timeout']));

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}

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else {

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curl_setopt($this->handle, CURLOPT_CONNECTTIMEOUT_MS, round($options['connect_timeout'] * 1000));

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}

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curl_setopt($this->handle, CURLOPT_URL, $url);

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curl_setopt($this->handle, CURLOPT_REFERER, $url);

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curl_setopt($this->handle, CURLOPT_USERAGENT, $options['useragent']);

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if (!empty($headers)) {

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curl_setopt($this->handle, CURLOPT_HTTPHEADER, $headers);

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}

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if ($options['protocol_version'] === 1.1) {

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curl_setopt($this->handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);

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}

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else {

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curl_setopt($this->handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);

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}

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if (true === $options['blocking']) {

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curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, array(&$this, 'stream_headers'));

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curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, array(&$this, 'stream_body'));

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curl_setopt($this->handle, CURLOPT_BUFFERSIZE, Requests::BUFFER_SIZE);

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}

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}

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/**

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* Process a response

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*

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* @param string $response Response data from the body

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* @param array $options Request options

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* @return string HTTP response data including headers

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*/

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public function process_response($response, $options) {

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if ($options['blocking'] === false) {

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$fake_headers = '';

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$options['hooks']->dispatch('curl.after_request', array(&$fake_headers));

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return false;

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}

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if ($options['filename'] !== false) {

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fclose($this->stream_handle);

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$this->headers = trim($this->headers);

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}

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else {

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$this->headers .= $response;

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}

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if (curl_errno($this->handle)) {

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$error = sprintf(

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'cURL error %s: %s',

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curl_errno($this->handle),

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curl_error($this->handle)

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);

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throw new Requests_Exception($error, 'curlerror', $this->handle);

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}

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$this->info = curl_getinfo($this->handle);

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$options['hooks']->dispatch('curl.after_request', array(&$this->headers, &$this->info));

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return $this->headers;

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}

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/**

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* Collect the headers as they are received

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*

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* @param resource $handle cURL resource

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* @param string $headers Header string

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* @return integer Length of provided header

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*/

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public function stream_headers($handle, $headers) {

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// Why do we do this? cURL will send both the final response and any

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// interim responses, such as a 100 Continue. We don't need that.

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// (We may want to keep this somewhere just in case)

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if ($this->done_headers) {

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$this->headers = '';

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$this->done_headers = false;

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}

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$this->headers .= $headers;

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if ($headers === "\r\n") {

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$this->done_headers = true;

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}

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return strlen($headers);

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}

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/**

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* Collect data as it's received

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*

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* @since 1.6.1

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*

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* @param resource $handle cURL resource

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* @param string $data Body data

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* @return integer Length of provided data

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*/

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public function stream_body($handle, $data) {

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$this->hooks->dispatch('request.progress', array($data, $this->response_bytes, $this->response_byte_limit));

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$data_length = strlen($data);

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// Are we limiting the response size?

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if ($this->response_byte_limit) {

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if ($this->response_bytes === $this->response_byte_limit) {

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// Already at maximum, move on

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return $data_length;

[469] Fix | Delete

}

[470] Fix | Delete

[471] Fix | Delete

if (($this->response_bytes + $data_length) > $this->response_byte_limit) {

[472] Fix | Delete

// Limit the length

[473] Fix | Delete

$limited_length = ($this->response_byte_limit - $this->response_bytes);

[474] Fix | Delete

$data = substr($data, 0, $limited_length);

[475] Fix | Delete

}

[476] Fix | Delete

}

[477] Fix | Delete

[478] Fix | Delete

if ($this->stream_handle) {

[479] Fix | Delete

fwrite($this->stream_handle, $data);

[480] Fix | Delete

}

[481] Fix | Delete

else {

[482] Fix | Delete

$this->response_data .= $data;

[483] Fix | Delete

}

[484] Fix | Delete

[485] Fix | Delete

$this->response_bytes += strlen($data);

[486] Fix | Delete

return $data_length;

[487] Fix | Delete

}

[488] Fix | Delete

[489] Fix | Delete

/**

[490] Fix | Delete

* Format a URL given GET data

[491] Fix | Delete

*

[492] Fix | Delete

* @param string $url

[493] Fix | Delete

* @param array|object $data Data to build query using, see {@see https://secure.php.net/http_build_query}

[494] Fix | Delete

* @return string URL with data

[495] Fix | Delete

*/

[496] Fix | Delete

protected static function format_get($url, $data) {

[497] Fix | Delete

if (!empty($data)) {

[498] Fix | Delete

$url_parts = parse_url($url);

[499] Fix | Delete