543 lines
15 KiB
PHP
543 lines
15 KiB
PHP
<?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 $data_length;
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}
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if (($this->response_bytes + $data_length) > $this->response_byte_limit) {
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// Limit the length
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$limited_length = ($this->response_byte_limit - $this->response_bytes);
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$data = substr($data, 0, $limited_length);
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}
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}
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if ($this->stream_handle) {
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fwrite($this->stream_handle, $data);
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}
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else {
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$this->response_data .= $data;
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}
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$this->response_bytes += strlen($data);
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return $data_length;
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}
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/**
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* Format a URL given GET data
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*
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* @param string $url
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* @param array|object $data Data to build query using, see {@see https://secure.php.net/http_build_query}
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* @return string URL with data
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*/
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protected static function format_get($url, $data) {
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if (!empty($data)) {
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$url_parts = parse_url($url);
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if (empty($url_parts['query'])) {
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$query = $url_parts['query'] = '';
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}
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else {
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$query = $url_parts['query'];
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}
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$query .= '&' . http_build_query($data, null, '&');
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$query = trim($query, '&');
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if (empty($url_parts['query'])) {
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$url .= '?' . $query;
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}
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else {
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$url = str_replace($url_parts['query'], $query, $url);
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}
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}
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return $url;
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}
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/**
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* Whether this transport is valid
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*
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* @codeCoverageIgnore
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* @return boolean True if the transport is valid, false otherwise.
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*/
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public static function test($capabilities = array()) {
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if (!function_exists('curl_init') || !function_exists('curl_exec')) {
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return false;
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}
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// If needed, check that our installed curl version supports SSL
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if (isset($capabilities['ssl']) && $capabilities['ssl']) {
|
|
$curl_version = curl_version();
|
|
if (!(CURL_VERSION_SSL & $curl_version['features'])) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|