386 lines
12 KiB
PHP
386 lines
12 KiB
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;
|
|
}
|
|
|
|
/**
|
|
* Filter 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 );
|
|
}
|
|
}
|