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WordPress/wp-includes/http.php

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<?php
/**
* Simple and uniform HTTP request API.
*
* Will eventually replace and standardize the WordPress HTTP requests made.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7
* @author Jacob Santos <wordpress@santosj.name>
*/
/**
* WordPress HTTP Class for managing HTTP Transports and making HTTP requests.
*
* This class is called for the functionality of making HTTP requests and should
* replace Snoopy functionality, eventually. There is no available functionality
* to add HTTP transport implementations, since most of the HTTP transports are
* added and available for use.
*
* The exception is that cURL is not available as a transport and lacking an
* implementation. It will be added later and should be a patch on the WordPress
* Trac.
*
* There are no properties, because none are needed and for performance reasons.
* Some of the functions are static and while they do have some overhead over
* functions in PHP4, the purpose is maintainability. When PHP5 is finally the
* requirement, it will be easy to add the static keyword to the code. It is not
* as easy to convert a function to a method after enough code uses the old way.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7
*/
class WP_Http {
/**
* PHP4 style Constructor - Calls PHP5 Style Constructor
*
* @since 2.7
* @return WP_Http
*/
function WP_Http() {
$this->__construct();
}
/**
* PHP5 style Constructor - Setup available transport if not available.
*
* PHP4 does not have the 'self' keyword and since WordPress supports PHP4,
* the class needs to be used for the static call.
*
* The transport are setup to save time. This should only be called once, so
* the overhead should be fine.
*
* @since 2.7
* @return WP_Http
*/
function __construct() {
WP_Http::_getTransport();
WP_Http::_postTransport();
}
/**
* Tests the WordPress HTTP objects for an object to use and returns it.
*
* Tests all of the objects and returns the object that passes. Also caches
* that object to be used later.
*
* The order for the GET/HEAD requests are Streams, HTTP Extension, Fopen,
* and finally Fsockopen. fsockopen() is used last, because it has the most
* overhead in its implementation. There isn't any real way around it, since
* redirects have to be supported, much the same way the other transports
* also handle redirects.
*
* There are currently issues with "localhost" not resolving correctly with
* DNS. This may cause an error "failed to open stream: A connection attempt
* failed because the connected party did not properly respond after a
* period of time, or established connection failed because connected host
* has failed to respond."
*
* @since 2.7
* @access private
*
* @return object|null Null if no transports are available, HTTP transport object.
*/
function &_getTransport() {
static $working_transport;
if ( is_null($working_transport) ) {
if ( true === WP_Http_ExtHttp::test() && apply_filters('use_http_extension_transport', true) )
$working_transport[] = new WP_Http_ExtHttp();
else if ( true === WP_Http_Curl::test() && apply_filters('use_curl_transport', true) )
$working_transport[] = new WP_Http_Curl();
else if ( true === WP_Http_Streams::test() && apply_filters('use_streams_transport', true) )
$working_transport[] = new WP_Http_Streams();
else if ( true === WP_Http_Fopen::test() && apply_filters('use_fopen_transport', true) )
$working_transport[] = new WP_Http_Fopen();
else if ( true === WP_Http_Fsockopen::test() && apply_filters('use_fsockopen_transport', true) )
$working_transport[] = new WP_Http_Fsockopen();
}
return $working_transport;
}
/**
* Tests the WordPress HTTP objects for an object to use and returns it.
*
* Tests all of the objects and returns the object that passes. Also caches
* that object to be used later. This is for posting content to a URL and
* is used when there is a body. The plain Fopen Transport can not be used
* to send content, but the streams transport can. This is a limitation that
* is addressed here, by just not including that transport.
*
* @since 2.7
* @access private
*
* @return object|null Null if no transports are available, HTTP transport object.
*/
function &_postTransport() {
static $working_transport;
if ( is_null($working_transport) ) {
if ( true === WP_Http_ExtHttp::test() && apply_filters('use_http_extension_transport', true) )
$working_transport[] = new WP_Http_ExtHttp();
else if ( true === WP_Http_Streams::test() && apply_filters('use_streams_transport', true) )
$working_transport[] = new WP_Http_Streams();
else if ( true === WP_Http_Fsockopen::test() && apply_filters('use_fsockopen_transport', true) )
$working_transport[] = new WP_Http_Fsockopen();
}
return $working_transport;
}
/**
* Send a HTTP request to a URI.
*
* The only URI that are supported in the HTTP Transport implementation are
* the HTTP and HTTPS protocols. HTTP and HTTPS are assumed so the server
* might not know how to handle the send headers. Other protocols are
* unsupported and most likely will fail.
*
* The defaults are 'method', 'timeout', 'redirection', 'httpversion',
* 'blocking' and 'user-agent'.
*
* Accepted 'method' values are 'GET', 'POST', and 'HEAD', some transports
* technically allow others, but should not be assumed. The 'timeout' is
* used to sent how long the connection should stay open before failing when
* no response. 'redirection' is used to track how many redirects were taken
* and used to sent the amount for other transports, but not all transports
* accept setting that value.
*
* The 'httpversion' option is used to sent the HTTP version and accepted
* values are '1.0', and '1.1' and should be a string. Version 1.1 is not
* supported, because of chunk response. The 'user-agent' option is the
* user-agent and is used to replace the default user-agent, which is
* 'WordPress/WP_Version', where WP_Version is the value from $wp_version.
*
* 'blocking' is the default, which is used to tell the transport, whether
* it should halt PHP while it performs the request or continue regardless.
* Actually, that isn't entirely correct. Blocking mode really just means
* whether the fread should just pull what it can whenever it gets bytes or
* if it should wait until it has enough in the buffer to read or finishes
* reading the entire content. It doesn't actually always mean that PHP will
* continue going after making the request.
*
* @access public
* @since 2.7
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs. Expects sanitized.
* @param string $body Optional. The body that should be sent. Will be automatically escaped and processed.
* @return boolean
*/
function request($url, $args = array(), $headers = null, $body = null) {
global $wp_version;
$defaults = array(
'method' => 'GET', 'timeout' => apply_filters('http_request_timeout', 3),
'redirection' => 5, 'httpversion' => '1.0',
'user-agent' => apply_filters('http_headers_useragent', 'WordPress/' . $wp_version ),
'blocking' => true
);
$r = wp_parse_args( $args, $defaults );
if ( is_null($headers) )
$headers = array();
if ( ! is_array($headers) ) {
$processedHeaders = WP_Http::processHeaders($headers);
$headers = $processedHeaders['headers'];
}
if ( ! isset($headers['user-agent']) || ! isset($headers['User-Agent']) )
$headers['user-agent'] = $r['user-agent'];
if ( is_null($body) ) {
$transports = WP_Http::_getTransport();
} else {
if ( is_array($body) || is_object($body) )
$body = http_build_query($body);
$transports = WP_Http::_postTransport();
}
$response = array( 'headers' => array(), 'body' => '', 'response' => array('code', 'message') );
foreach( (array) $transports as $transport ) {
$response = $transport->request($url, $r, $headers, $body);
if( !is_wp_error($response) )
return $response;
}
return $response;
}
/**
* Uses the POST HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return boolean
*/
function post($url, $args = array(), $headers = null, $body = null) {
$defaults = array('method' => 'POST');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r, $headers, $body);
}
/**
* Uses the GET HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return boolean
*/
function get($url, $args = array(), $headers = null, $body = null) {
$defaults = array('method' => 'GET');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r, $headers, $body);
}
/**
* Uses the HEAD HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return boolean
*/
function head($url, $args = array(), $headers = null, $body = null) {
$defaults = array('method' => 'HEAD');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r, $headers, $body);
}
/**
* Parses the responses and splits the parts into headers and body.
*
* @access public
* @static
* @since 2.7
*
* @param string $strResponse The full response string
* @return array Array with 'headers' and 'body' keys.
*/
function processResponse($strResponse) {
list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2);
return array('headers' => $theHeaders, 'body' => $theBody);
}
/**
* Whether response code is in the 400 range.
*
* @access public
* @static
* @since 2.7
*
* @param array $response Array with code and message keys
* @return bool True if 40x Response, false if something else.
*/
function is400Response($response) {
if ( (int) substr($response, 0, 1) == 4 )
return true;
return false;
}
/**
* Whether the headers returned a redirect location.
*
* Actually just checks whether the location header exists.
*
* @access public
* @static
* @since 2.7
*
* @param array $headers Array with headers
* @return bool True if Location header is found.
*/
function isRedirect($headers) {
if ( isset($headers['location']) )
return true;
return false;
}
/**
* Transform header string into an array.
*
* If an array is given then it is assumed to be raw header data with
* numeric keys with the headers as the values. No headers must be passed
* that were already processed.
*
* @access public
* @static
* @since 2.7
*
* @param string|array $headers
* @return array Processed string headers
*/
function processHeaders($headers) {
if ( is_string($headers) )
$headers = explode("\n", str_replace(array("\r\n", "\r"), "\n", $headers) );
$response = array('code' => 0, 'message' => '');
$newheaders = array();
foreach ( $headers as $tempheader ) {
if ( empty($tempheader) )
continue;
if ( false === strpos($tempheader, ':') ) {
list( , $iResponseCode, $strResponseMsg) = explode(' ', $tempheader, 3);
$response['code'] = $iResponseCode;
$response['message'] = $strResponseMsg;
continue;
}
list($key, $value) = explode(':', $tempheader, 2);
if ( ! empty($value) )
$newheaders[strtolower($key)] = trim($value);
}
return array('response' => $response, 'headers' => $newheaders);
}
}
/**
* HTTP request method uses fsockopen function to retrieve the url.
*
* This would be the preferred method, but the fsockopen implementation has the
* most overhead of all the HTTP transport implementations.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7
*/
class WP_Http_Fsockopen {
/**
* Send a HTTP request to a URI using fsockopen().
*
* Does not support non-blocking mode.
*
* @see WP_Http::retrieve For default options descriptions.
*
* @since 2.7
* @access public
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs. Expects sanitized.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return array 'headers', 'body', and 'response' keys.
*/
function request($url, $args = array(), $headers = null, $body = null) {
$defaults = array(
'method' => 'GET', 'timeout' => 3,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true
);
$r = wp_parse_args( $args, $defaults );
$iError = null; // Store error number
$strError = null; // Store error string
$arrURL = parse_url($url);
$secure_transport = false;
if ( ! isset($arrURL['port']) ) {
if ( ($arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https') && extension_loaded('openssl') ) {
$arrURL['host'] = 'ssl://' . $arrURL['host'];
$arrURL['port'] = apply_filters('http_request_port', 443);
$secure_transport = true;
} else {
$arrURL['port'] = apply_filters('http_request_default_port', 80);
}
} else {
$arrURL['port'] = apply_filters('http_request_port', $arrURL['port']);
}
// There are issues with the HTTPS and SSL protocols that cause errors
// that can be safely ignored and should be ignored.
if ( true === $secure_transport )
$error_reporting = error_reporting(0);
$handle = fsockopen($arrURL['host'], $arrURL['port'], $iError, $strError, $r['timeout'] );
if ( false === $handle )
return new WP_Error('http_request_failed', $iError . ': ' . $strError);
$requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' );
$requestPath = empty($requestPath) ? '/' : $requestPath;
$strHeaders = '';
$strHeaders .= strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n";
$strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n";
if ( is_array($header) ) {
foreach ( (array) $this->getHeaders() as $header => $headerValue )
$strHeaders .= $header . ': ' . $headerValue . "\r\n";
} else {
$strHeaders .= $header;
}
$strHeaders .= "\r\n";
if ( ! is_null($body) )
$strHeaders .= $body;
fwrite($handle, $strHeaders);
if ( ! $r['blocking'] ) {
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code', 'message') );
}
$strResponse = '';
while ( ! feof($handle) )
$strResponse .= fread($handle, 4096);
fclose($handle);
if ( true === $secure_transport )
error_reporting($error_reporting);
$process = WP_Http::processResponse($strResponse);
$arrHeaders = WP_Http::processHeaders($process['headers']);
if ( WP_Http::is400Response($arrHeaders['response']) )
return new WP_Error('http_request_failed', $arrHeaders['response']['code'] . ': ' . $arrHeaders['response']['message']);
if ( isset($arrHeaders['headers']['location']) ) {
if ( $r['redirection']-- > 0 )
return $this->request($arrHeaders['headers']['location'], $r, $headers, $body);
else
return new WP_Error('http_request_failed', __('Too many redirects.'));
}
return array('headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @since 2.7
* @static
* @return boolean False means this class can not be used, true means it can.
*/
function test() {
if ( function_exists( 'fsockopen' ) )
return true;
return false;
}
}
/**
* HTTP request method uses fopen function to retrieve the url.
*
* Requires PHP version greater than 4.3.0 for stream support. Does not allow
* for $context support, but should still be okay, to write the headers, before
* getting the response. Also requires that 'allow_url_fopen' to be enabled.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7
*/
class WP_Http_Fopen {
/**
* Send a HTTP request to a URI using fopen().
*
* This transport does not support sending of headers and body, therefore
* should not be used in the instances, where there is a body and headers.
*
* Notes: Does not support non-blocking mode. Ignores 'redirection' option.
*
* @see WP_Http::retrieve For default options descriptions.
*
* @access public
* @since 2.7
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs. Expects sanitized.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return array 'headers', 'body', and 'response' keys.
*/
function request($url, $args = array(), $headers = null, $body = null) {
global $http_response_header;
$defaults = array(
'method' => 'GET', 'timeout' => 3,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true
);
$r = wp_parse_args( $args, $defaults );
$arrURL = parse_url($url);
if ( false === $arrURL )
return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url));
if ( 'http' != $arrURL['scheme'] || 'https' != $arrURL['scheme'] )
$url = str_replace($arrURL['scheme'], 'http', $url);
if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) )
$handle = @fopen($url, 'r');
else
$handle = fopen($url, 'r');
if (! $handle)
return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url));
if ( function_exists('stream_set_timeout') )
stream_set_timeout($handle, $r['timeout'] );
if ( ! $r['blocking'] ) {
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code', 'message') );
}
$strResponse = '';
while ( ! feof($handle) )
$strResponse .= fread($handle, 4096);
$theHeaders = '';
if ( function_exists('stream_get_meta_data') ) {
$meta = stream_get_meta_data($handle);
$theHeaders = $meta['wrapper_data'];
} else {
$theHeaders = $http_response_header;
}
fclose($handle);
$processedHeaders = WP_Http::processHeaders($theHeaders);
return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @static
* @return boolean False means this class can not be used, true means it can.
*/
function test() {
if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) )
return false;
return true;
}
}
/**
* HTTP request method uses Streams to retrieve the url.
*
* Requires PHP 5.0+ and uses fopen with stream context. Requires that
* 'allow_url_fopen' PHP setting to be enabled.
*
* Second preferred method for getting the URL, for PHP 5.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7
*/
class WP_Http_Streams {
/**
* Send a HTTP request to a URI using streams with fopen().
*
* @access public
* @since 2.7
*
* @param string $url
* @param str|array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs. Expects sanitized.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return array 'headers', 'body', and 'response' keys.
*/
function request($url, $args = array(), $headers = null, $body = null) {
$defaults = array(
'method' => 'GET', 'timeout' => 3,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true
);
$r = wp_parse_args( $args, $defaults );
if ( isset($headers['User-Agent']) ) {
$r['user-agent'] = $headers['User-Agent'];
unset($headers['User-Agent']);
} else if( isset($headers['user-agent']) ) {
$r['user-agent'] = $headers['user-agent'];
unset($headers['user-agent']);
} else {
$r['user-agent'] = apply_filters('http_headers_useragent', 'WordPress/' . $wp_version );
}
$arrURL = parse_url($url);
if ( false === $arrURL )
return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url));
if ( 'http' != $arrURL['scheme'] || 'https' != $arrURL['scheme'] )
$url = str_replace($arrURL['scheme'], 'http', $url);
$arrContext = array('http' =>
array(
'method' => strtoupper($r['method']),
'user-agent' => $r['user-agent'],
'max_redirects' => $r['redirection'],
'protocol_version' => (float) $r['httpversion'],
'header' => $headers,
'timeout' => $r['timeout']
)
);
if ( ! is_null($body) )
$arrContext['http']['content'] = $body;
$context = stream_context_create($arrContext);
if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) )
$handle = @fopen($url, 'r');
else
$handle = fopen($url, 'r');
if ( ! $handle)
return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url));
stream_set_timeout($handle, $r['timeout'] );
if ( ! $r['blocking'] ) {
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code', 'message') );
}
$strResponse = stream_get_contents($handle);
$meta = stream_get_meta_data($handle);
$processedHeaders = WP_Http::processHeaders($meta['wrapper_data']);
fclose($handle);
return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @static
* @access public
* @since 2.7
*
* @return boolean False means this class can not be used, true means it can.
*/
function test() {
if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) )
return false;
if ( version_compare(PHP_VERSION, '5.0', '<') )
return false;
return true;
}
}
/**
* HTTP request method uses HTTP extension to retrieve the url.
*
* Requires the HTTP extension to be installed. This would be the preferred
* transport since it can handle a lot of the problems that forces the others to
* use the HTTP version 1.0. Even if PHP 5.2+ is being used, it doesn't mean
* that the HTTP extension will be enabled.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7
*/
class WP_Http_ExtHTTP {
/**
* Send a HTTP request to a URI using HTTP extension.
*
* Does not support non-blocking.
*
* @access public
* @since 2.7
*
* @param string $url
* @param str|array $args Optional. Override the defaults.
* @param array $headers Optional. Either the header string or array of Header name and value pairs. Expects sanitized.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return array 'headers', 'body', and 'response' keys.
*/
function request($url, $args = array(), $headers = null, $body = null) {
global $wp_version;
$defaults = array(
'method' => 'GET', 'timeout' => 3,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true
);
$r = wp_parse_args( $args, $defaults );
if ( isset($headers['User-Agent']) ) {
$r['user-agent'] = $headers['User-Agent'];
unset($headers['User-Agent']);
} else if( isset($headers['user-agent']) ) {
$r['user-agent'] = $headers['user-agent'];
unset($headers['user-agent']);
} else {
$r['user-agent'] = apply_filters('http_headers_useragent', 'WordPress/' . $wp_version );
}
switch ( $r['method'] ) {
case 'GET':
$r['method'] = HTTP_METH_GET;
break;
case 'POST':
$r['method'] = HTTP_METH_POST;
break;
case 'HEAD':
$r['method'] = HTTP_METH_HEAD;
break;
default:
$r['method'] = HTTP_METH_GET;
}
$arrURL = parse_url($url);
if ( 'http' != $arrURL['scheme'] || 'https' != $arrURL['scheme'] )
$url = str_replace($arrURL['scheme'], 'http', $url);
$options = array(
'timeout' => $r['timeout'],
'connecttimeout' => $r['timeout'],
'redirect' => $r['redirection'],
'useragent' => $r['user-agent'],
'headers' => $headers,
);
$strResponse = http_request($r['method'], $url, $body, $options, $info);
if ( false === $strResponse )
return new WP_Error('http_request_failed', $info['response_code'] . ': ' . $info['error']);
if ( ! $r['blocking'] )
return array( 'headers' => array(), 'body' => '', 'response' => array('code', 'message') );
list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2);
$theHeaders = WP_Http::processHeaders($theHeaders);
$theResponse = array();
$theResponse['code'] = $info['response_code'];
$theResponse['message'] = get_status_header_desc($info['response_code']);
return array('headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $theResponse);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @static
* @since 2.7
*
* @return boolean False means this class can not be used, true means it can.
*/
function test() {
if ( function_exists('http_request') )
return true;
return false;
}
}
/**
* HTTP request method uses Curl extension to retrieve the url.
*
* Requires the Curl extension to be installed.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7
*/
class WP_Http_Curl {
/**
* Send a HTTP request to a URI using cURL extension.
*
* @access public
* @since 2.7
*
* @param string $url
* @param str|array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs. Expects sanitized.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return array 'headers', 'body', and 'response' keys.
*/
function request($url, $args = array(), $headers = null, $body = null) {
global $wp_version;
$defaults = array(
'method' => 'GET', 'timeout' => 3,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true
);
$r = wp_parse_args( $args, $defaults );
if ( isset($headers['User-Agent']) ) {
$r['user-agent'] = $headers['User-Agent'];
unset($headers['User-Agent']);
} else if( isset($headers['user-agent']) ) {
$r['user-agent'] = $headers['user-agent'];
unset($headers['user-agent']);
} else {
$r['user-agent'] = apply_filters('http_headers_useragent', 'WordPress/' . $wp_version );
}
$handle = curl_init();
curl_setopt( $handle, CURLOPT_URL, $url);
if ( true === $r['blocking'] ) {
curl_setopt( $handle, CURLOPT_HEADER, true );
} else {
curl_setopt( $handle, CURLOPT_HEADER, false );
curl_setopt( $handle, CURLOPT_NOBODY, true );
}
curl_setopt( $handle, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] );
curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, 1 );
curl_setopt( $handle, CURLOPT_TIMEOUT, $r['timeout'] );
curl_setopt( $handle, CURLOPT_MAXREDIRS, $r['redirection'] );
if ( !ini_get('safe_mode') && !ini_get('open_basedir') )
curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, true );
if( ! is_null($headers) )
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 );
if ( ! $r['blocking'] ) {
curl_close( $handle );
return array( 'headers' => array(), 'body' => '', 'response' => array('code', 'message') );
}
$theResponse = curl_exec( $handle );
list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2);
$theHeaders = WP_Http::processHeaders($theHeaders);
$response = array();
$response['code'] = curl_getinfo( $handle, CURLINFO_HTTP_CODE );
$response['message'] = get_status_header_desc($response['code']);
curl_close( $handle );
return array('headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $response);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @static
* @since 2.7
*
* @return boolean False means this class can not be used, true means it can.
*/
function test() {
if ( function_exists('curl_init') )
return true;
return false;
}
}
/**
* Returns the initialized WP_Http Object
*
* @since 2.7
* @access private
*
* @return WP_Http HTTP Transport object.
*/
function &_wp_http_get_object() {
static $http;
if ( is_null($http) )
$http = new WP_Http();
return $http;
}
/**
* Retrieve the raw response from the HTTP request.
*
* The array structure is a little complex.
*
* <code>
* $res = array( 'headers' =>
* 'response' => array('code', 'message'),
* 'headers' => array()
* );
* </code>
*
* All of the headers in $res['headers']['headers'] are with the name as the key
* and the value as the value. So to get the User-Agent, you would do the
* following.
*
* <code>
* $user_agent = $res['headers']['headers']['user-agent'];
* </code>
*
* The body is the raw response content and can be retrieved from $res['body'].
*
* This function is called first to make the request and there are other API
* functions to abstract out the above convoluted setup.
*
* @since 2.7
*
* @param string $url Site URL to retrieve.
* @param array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return string The body of the response
*/
function wp_remote_request($url, $args = array(), $headers = null, $body = null) {
$objFetchSite = _wp_http_get_object();
return $objFetchSite->request($url, $args, $headers, $body);
}
/**
* Retrieve the raw response from the HTTP request using the GET method.
*
* @see wp_remote_request() For more information on the response array format.
*
* @since 2.7
*
* @param string $url Site URL to retrieve.
* @param array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return string The body of the response
*/
function wp_remote_get($url, $args = array(), $headers = null, $body = null) {
$objFetchSite = _wp_http_get_object();
return $objFetchSite->get($url, $args, $headers, $body);
}
/**
* Retrieve the raw response from the HTTP request using the POST method.
*
* @see wp_remote_request() For more information on the response array format.
*
* @since 2.7
*
* @param string $url Site URL to retrieve.
* @param array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return string The body of the response
*/
function wp_remote_post($url, $args = array(), $headers = null, $body = null) {
$objFetchSite = _wp_http_get_object();
return $objFetchSite->post($url, $args, $headers, $body);
}
/**
* Retrieve the raw response from the HTTP request using the HEAD method.
*
* @see wp_remote_request() For more information on the response array format.
*
* @since 2.7
*
* @param string $url Site URL to retrieve.
* @param array $args Optional. Override the defaults.
* @param string|array $headers Optional. Either the header string or array of Header name and value pairs.
* @param string $body Optional. The body that should be sent. Expected to be already processed.
* @return string The body of the response
*/
function wp_remote_head($url, $args = array(), $headers = null, $body = null) {
$objFetchSite = _wp_http_get_object();
return $objFetchSite->head($url, $args, $headers, $body);
}
/**
* Retrieve only the headers from the raw response.
*
* @since 2.7
*
* @param array $response HTTP response.
* @return array The headers of the response. Empty array if incorrect parameter given.
*/
function wp_remote_retrieve_headers(&$response) {
if ( ! isset($response['headers']) || ! is_array($response['headers']))
return array();
return $response['headers'];
}
/**
* Retrieve a single header by name from the raw response.
*
* @since 2.7
*
* @param array $response
* @param string $header Header name to retrieve value from.
* @return array The header value. Empty string on if incorrect parameter given.
*/
function wp_remote_retrieve_header(&$response, $header) {
if ( ! isset($response['headers']) || ! is_array($response['headers']))
return '';
if ( array_key_exists($header, $response['headers']) )
return $response['headers'][$header];
return '';
}
/**
* Retrieve only the response code from the raw response.
*
* Will return an empty array if incorrect parameter value is given.
*
* @since 2.7
*
* @param array $response HTTP response.
* @return array The keys 'code' and 'message' give information on the response.
*/
function wp_remote_retrieve_response_code(&$response) {
if ( ! isset($response['response']) || ! is_array($response['response']))
return '';
return $response['response']['code'];
}
/**
* Retrieve only the response message from the raw response.
*
* Will return an empty array if incorrect parameter value is given.
*
* @since 2.7
*
* @param array $response HTTP response.
* @return array The keys 'code' and 'message' give information on the response.
*/
function wp_remote_retrieve_response_message(&$response) {
if ( ! isset($response['response']) || ! is_array($response['response']))
return '';
return $response['response']['message'];
}
/**
* Retrieve only the body from the raw response.
*
* @since 2.7
*
* @param array $response HTTP response.
* @return string The body of the response. Empty string if no body or incorrect parameter given.
*/
function wp_remote_retrieve_body(&$response) {
if ( ! isset($response['body']) )
return '';
return $response['body'];
}
?>
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