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Edit File: class-wp-http-curl.php
<?php /** * HTTP API: WP_Http_Curl class * * @package WordPress * @subpackage HTTP * @since 4.4.0 */ /** * Core class used to integrate Curl as an HTTP transport. * * HTTP request method uses Curl extension to retrieve the url. * * Requires the Curl extension to be installed. * * @since 2.7.0 */ class WP_Http_Curl { /** * Temporary header storage for during requests. * * @since 3.2.0 * @access private * @var string */ private $headers = ''; /** * Temporary body storage for during requests. * * @since 3.6.0 * @access private * @var string */ private $body = ''; /** * The maximum amount of data to receive from the remote server. * * @since 3.6.0 * @access private * @var int */ private $max_body_length = false; /** * The file resource used for streaming to file. * * @since 3.6.0 * @access private * @var resource */ private $stream_handle = false; /** * The total bytes written in the current request. * * @since 4.1.0 * @access private * @var int */ private $bytes_written_total = 0; /** * Send a HTTP request to a URI using cURL extension. * * @access public * @since 2.7.0 * * @param string $url The request URL. * @param string|array $args Optional. Override the defaults. * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ public function request($url, $args = array()) { $defaults = array( 'method' => 'GET', 'timeout' => 5, 'redirection' => 5, 'httpversion' => '1.0', 'blocking' => true, 'headers' => array(), 'body' => null, 'cookies' => array() ); $r = wp_parse_args( $args, $defaults ); if ( isset( $r['headers']['User-Agent'] ) ) { $r['user-agent'] = $r['headers']['User-Agent']; unset( $r['headers']['User-Agent'] ); } elseif ( isset( $r['headers']['user-agent'] ) ) { $r['user-agent'] = $r['headers']['user-agent']; unset( $r['headers']['user-agent'] ); } // Construct Cookie: header if any cookies are set. WP_Http::buildCookieHeader( $r ); $handle = curl_init(); // cURL offers really easy proxy support. $proxy = new WP_HTTP_Proxy(); if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { curl_setopt( $handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP ); curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() ); curl_setopt( $handle, CURLOPT_PROXYPORT, $proxy->port() ); if ( $proxy->use_authentication() ) { curl_setopt( $handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY ); curl_setopt( $handle, CURLOPT_PROXYUSERPWD, $proxy->authentication() ); } } $is_local = isset($r['local']) && $r['local']; $ssl_verify = isset($r['sslverify']) && $r['sslverify']; if ( $is_local ) { /** This filter is documented in wp-includes/class-wp-http-streams.php */ $ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify ); } elseif ( ! $is_local ) { /** This filter is documented in wp-includes/class-wp-http-streams.php */ $ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify ); } /* * CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers. Have to use ceil since. * a value of 0 will allow an unlimited timeout. */ $timeout = (int) ceil( $r['timeout'] ); curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $timeout ); curl_setopt( $handle, CURLOPT_TIMEOUT, $timeout ); curl_setopt( $handle, CURLOPT_URL, $url); curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true ); curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, ( $ssl_verify === true ) ? 2 : false ); curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify ); if ( $ssl_verify ) { curl_setopt( $handle, CURLOPT_CAINFO, $r['sslcertificates'] ); } curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] ); /* * The option doesn't work with safe mode or when open_basedir is set, and there's * a bug #17490 with redirected POST requests, so handle redirections outside Curl. */ curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, false ); if ( defined( 'CURLOPT_PROTOCOLS' ) ) // PHP 5.2.10 / cURL 7.19.4 curl_setopt( $handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS ); switch ( $r['method'] ) { case 'HEAD': curl_setopt( $handle, CURLOPT_NOBODY, true ); break; case 'POST': curl_setopt( $handle, CURLOPT_POST, true ); curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] ); break; case 'PUT': curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'PUT' ); curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] ); break; default: curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, $r['method'] ); if ( ! is_null( $r['body'] ) ) curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] ); break; } if ( true === $r['blocking'] ) { curl_setopt( $handle, CURLOPT_HEADERFUNCTION, array( $this, 'stream_headers' ) ); curl_setopt( $handle, CURLOPT_WRITEFUNCTION, array( $this, 'stream_body' ) ); } curl_setopt( $handle, CURLOPT_HEADER, false ); if ( isset( $r['limit_response_size'] ) ) $this->max_body_length = intval( $r['limit_response_size'] ); else $this->max_body_length = false; // If streaming to a file open a file handle, and setup our curl streaming handler. if ( $r['stream'] ) { if ( ! WP_DEBUG ) $this->stream_handle = @fopen( $r['filename'], 'w+' ); else $this->stream_handle = fopen( $r['filename'], 'w+' ); if ( ! $this->stream_handle ) return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) ); } else { $this->stream_handle = false; } if ( !empty( $r['headers'] ) ) { // cURL expects full header strings in each element. $headers = array(); foreach ( $r['headers'] as $name => $value ) { $headers[] = "{$name}: $value"; } curl_setopt( $handle, CURLOPT_HTTPHEADER, $headers ); } if ( $r['httpversion'] == '1.0' ) curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 ); else curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 ); /** * Fires before the cURL request is executed. * * Cookies are not currently handled by the HTTP API. This action allows * plugins to handle cookies themselves. * * @since 2.8.0 * * @param resource &$handle The cURL handle returned by curl_init(). * @param array $r The HTTP request arguments. * @param string $url The request URL. */ do_action_ref_array( 'http_api_curl', array( &$handle, $r, $url ) ); // We don't need to return the body, so don't. Just execute request and return. if ( ! $r['blocking'] ) { curl_exec( $handle ); if ( $curl_error = curl_error( $handle ) ) { curl_close( $handle ); return new WP_Error( 'http_request_failed', $curl_error ); } if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ) ) ) { curl_close( $handle ); return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) ); } curl_close( $handle ); return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); } curl_exec( $handle ); $theHeaders = WP_Http::processHeaders( $this->headers, $url ); $theBody = $this->body; $bytes_written_total = $this->bytes_written_total; $this->headers = ''; $this->body = ''; $this->bytes_written_total = 0; $curl_error = curl_errno( $handle ); // If an error occurred, or, no response. if ( $curl_error || ( 0 == strlen( $theBody ) && empty( $theHeaders['headers'] ) ) ) { if ( CURLE_WRITE_ERROR /* 23 */ == $curl_error ) { if ( ! $this->max_body_length || $this->max_body_length != $bytes_written_total ) { if ( $r['stream'] ) { curl_close( $handle ); fclose( $this->stream_handle ); return new WP_Error( 'http_request_failed', __( 'Failed to write request to temporary file.' ) ); } else { curl_close( $handle ); return new WP_Error( 'http_request_failed', curl_error( $handle ) ); } } } else { if ( $curl_error = curl_error( $handle ) ) { curl_close( $handle ); return new WP_Error( 'http_request_failed', $curl_error ); } } if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ) ) ) { curl_close( $handle ); return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) ); } } curl_close( $handle ); if ( $r['stream'] ) fclose( $this->stream_handle ); $response = array( 'headers' => $theHeaders['headers'], 'body' => null, 'response' => $theHeaders['response'], 'cookies' => $theHeaders['cookies'], 'filename' => $r['filename'] ); // Handle redirects. if ( false !== ( $redirect_response = WP_HTTP::handle_redirects( $url, $r, $response ) ) ) return $redirect_response; if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) ) $theBody = WP_Http_Encoding::decompress( $theBody ); $response['body'] = $theBody; return $response; } /** * Grabs the headers of the cURL request. * * Each header is sent individually to this callback, so we append to the `$header` property * for temporary storage * * @since 3.2.0 * @access private * * @param resource $handle cURL handle. * @param string $headers cURL request headers. * @return int Length of the request headers. */ private function stream_headers( $handle, $headers ) { $this->headers .= $headers; return strlen( $headers ); } /** * Grabs the body of the cURL request. * * The contents of the document are passed in chunks, so we append to the `$body` * property for temporary storage. Returning a length shorter than the length of * `$data` passed in will cause cURL to abort the request with `CURLE_WRITE_ERROR`. * * @since 3.6.0 * @access private * * @param resource $handle cURL handle. * @param string $data cURL request body. * @return int Total bytes of data written. */ private function stream_body( $handle, $data ) { $data_length = strlen( $data ); if ( $this->max_body_length && ( $this->bytes_written_total + $data_length ) > $this->max_body_length ) { $data_length = ( $this->max_body_length - $this->bytes_written_total ); $data = substr( $data, 0, $data_length ); } if ( $this->stream_handle ) { $bytes_written = fwrite( $this->stream_handle, $data ); } else { $this->body .= $data; $bytes_written = $data_length; } $this->bytes_written_total += $bytes_written; // Upon event of this function returning less than strlen( $data ) curl will error with CURLE_WRITE_ERROR. return $bytes_written; } /** * Determines whether this class can be used for retrieving a URL. * * @static * @since 2.7.0 * * @param array $args Optional. Array of request arguments. Default empty array. * @return bool False means this class can not be used, true means it can. */ public static function test( $args = array() ) { if ( ! function_exists( 'curl_init' ) || ! function_exists( 'curl_exec' ) ) return false; $is_ssl = isset( $args['ssl'] ) && $args['ssl']; if ( $is_ssl ) { $curl_version = curl_version(); // Check whether this cURL version support SSL requests. if ( ! (CURL_VERSION_SSL & $curl_version['features']) ) return false; } /** * Filters whether cURL can be used as a transport for retrieving a URL. * * @since 2.7.0 * * @param bool $use_class Whether the class can be used. Default true. * @param array $args An array of request arguments. */ return apply_filters( 'use_curl_transport', true, $args ); } }
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