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Fix WP_HTTP to only make a request upon a working transport, as well as to allow Unit Testing. Removes the getTransport() & postTransport() methods as they're no longer needed, replaces them with a single _dispatch_request() method. Fixes #11613
git-svn-id: http://svn.automattic.com/wordpress/trunk@17550 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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@ -37,131 +37,6 @@
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*/
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class WP_Http {
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/**
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* PHP4 style Constructor - Calls PHP5 Style Constructor
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*
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* @since 2.7.0
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* @return WP_Http
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*/
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function WP_Http() {
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$this->__construct();
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}
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/**
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* PHP5 style Constructor - Set up available transport if not available.
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*
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* PHP4 does not have the 'self' keyword and since WordPress supports PHP4, the class needs to
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* be used for the static call. The transport are set up to save time and will only be created
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* once. This class can be created many times without having to go through the step of finding
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* which transports are available.
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*
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* @since 2.7.0
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* @return WP_Http
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*/
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function __construct() {
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WP_Http::_getTransport();
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WP_Http::_postTransport();
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}
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/**
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* Tests the WordPress HTTP objects for an object to use and returns it.
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*
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* Tests all of the objects and returns the object that passes. Also caches that object to be
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* used later.
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*
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* The order for the GET/HEAD requests are HTTP Extension, cURL, Streams, and finally
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* Fsockopen. fsockopen() is used last, because it has the most overhead in its implementation.
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* There isn't any real way around it, since redirects have to be supported, much the same way
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* the other transports also handle redirects.
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*
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* There are currently issues with "localhost" not resolving correctly with DNS. This may cause
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* an error "failed to open stream: A connection attempt failed because the connected party did
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* not properly respond after a period of time, or established connection failed because [the]
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* connected host has failed to respond."
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*
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* @since 2.7.0
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* @access private
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*
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* @param array $args Request args, default us an empty array
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* @return object|null Null if no transports are available, HTTP transport object.
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*/
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function &_getTransport( $args = array() ) {
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static $working_transport, $blocking_transport, $nonblocking_transport;
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if ( is_null($working_transport) ) {
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if ( true === WP_Http_ExtHttp::test($args) ) {
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$working_transport['exthttp'] = new WP_Http_ExtHttp();
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$blocking_transport[] = &$working_transport['exthttp'];
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} else if ( true === WP_Http_Curl::test($args) ) {
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$working_transport['curl'] = new WP_Http_Curl();
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$blocking_transport[] = &$working_transport['curl'];
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} else if ( true === WP_Http_Streams::test($args) ) {
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$working_transport['streams'] = new WP_Http_Streams();
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$blocking_transport[] = &$working_transport['streams'];
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} else if ( true === WP_Http_Fsockopen::test($args) ) {
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$working_transport['fsockopen'] = new WP_Http_Fsockopen();
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$blocking_transport[] = &$working_transport['fsockopen'];
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}
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foreach ( array('curl', 'streams', 'fsockopen', 'exthttp') as $transport ) {
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if ( isset($working_transport[$transport]) )
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$nonblocking_transport[] = &$working_transport[$transport];
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}
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}
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do_action( 'http_transport_get_debug', $working_transport, $blocking_transport, $nonblocking_transport );
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if ( isset($args['blocking']) && !$args['blocking'] )
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return $nonblocking_transport;
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else
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return $blocking_transport;
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}
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/**
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* Tests the WordPress HTTP objects for an object to use and returns it.
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*
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* Tests all of the objects and returns the object that passes. Also caches
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* that object to be used later. This is for posting content to a URL and
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* is used when there is a body.
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*
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* @since 2.7.0
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* @access private
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*
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* @param array $args Request args, default us an empty array
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* @return object|null Null if no transports are available, HTTP transport object.
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*/
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function &_postTransport( $args = array() ) {
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static $working_transport, $blocking_transport, $nonblocking_transport;
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if ( is_null($working_transport) ) {
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if ( true === WP_Http_ExtHttp::test($args) ) {
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$working_transport['exthttp'] = new WP_Http_ExtHttp();
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$blocking_transport[] = &$working_transport['exthttp'];
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} else if ( true === WP_Http_Curl::test($args) ) {
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$working_transport['curl'] = new WP_Http_Curl();
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$blocking_transport[] = &$working_transport['curl'];
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} else if ( true === WP_Http_Streams::test($args) ) {
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$working_transport['streams'] = new WP_Http_Streams();
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$blocking_transport[] = &$working_transport['streams'];
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} else if ( true === WP_Http_Fsockopen::test($args) ) {
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$working_transport['fsockopen'] = new WP_Http_Fsockopen();
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$blocking_transport[] = &$working_transport['fsockopen'];
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}
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foreach ( array('curl', 'streams', 'fsockopen', 'exthttp') as $transport ) {
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if ( isset($working_transport[$transport]) )
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$nonblocking_transport[] = &$working_transport[$transport];
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}
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}
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do_action( 'http_transport_post_debug', $working_transport, $blocking_transport, $nonblocking_transport );
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if ( isset($args['blocking']) && !$args['blocking'] )
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return $nonblocking_transport;
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else
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return $blocking_transport;
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}
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/**
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* Send a HTTP request to a URI.
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*
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@ -205,7 +80,7 @@ class WP_Http {
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*
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* @param string $url URI resource.
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* @param str|array $args Optional. Override the defaults.
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* @return array containing 'headers', 'body', 'response', 'cookies'
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* @return array|object Array containing 'headers', 'body', 'response', 'cookies'. A WP_Error instance upon error
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*/
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function request( $url, $args = array() ) {
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global $wp_version;
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@ -281,11 +156,6 @@ class WP_Http {
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// header isn't already set.
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if ( ($r['method'] == 'POST' || $r['method'] == 'PUT') && ! isset( $r['headers']['Content-Length'] ) )
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$r['headers']['Content-Length'] = 0;
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// The method is ambiguous, because we aren't talking about HTTP methods, the "get" in
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// this case is simply that we aren't sending any bodies and to get the transports that
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// don't support sending bodies along with those which do.
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$transports = WP_Http::_getTransport( $r );
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} else {
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if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) {
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$r['body'] = http_build_query( $r['body'], null, '&' );
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@ -295,27 +165,65 @@ class WP_Http {
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if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) )
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$r['headers']['Content-Length'] = strlen( $r['body'] );
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// The method is ambiguous, because we aren't talking about HTTP methods, the "post" in
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// this case is simply that we are sending HTTP body and to get the transports that do
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// support sending the body. Not all do, depending on the limitations of the PHP core
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// limitations.
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$transports = WP_Http::_postTransport( $r );
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}
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do_action( 'http_api_debug', $transports, 'transports_list' );
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return $this->_dispatch_request($url, $r);
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}
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$response = array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
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foreach ( (array) $transports as $transport ) {
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$response = $transport->request( $url, $r );
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/**
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* Dispatches a HTTP request to a supporting transport.
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*
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* Tests each transport in order to find a transport which matches the request arguements.
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* Also caches the transport instance to be used later.
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*
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* The order for blocking requests is HTTP Extension, cURL, Streams, and finally Fsockopen.
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* The order for non-blocking requests is cURL, Streams, Fsockopen() and finally, HTTP Extension.
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* The HTTP Extension does not support non-blocking requests, but is included as a final resort.
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*
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* There are currently issues with "localhost" not resolving correctly with DNS. This may cause
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* an error "failed to open stream: A connection attempt failed because the connected party did
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* not properly respond after a period of time, or established connection failed because [the]
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* connected host has failed to respond."
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*
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* @since 3.2.0
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* @access private
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*
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* @param string $url URL to Request
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* @param array $args Request arguments
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* @return array|object Array containing 'headers', 'body', 'response', 'cookies'. A WP_Error instance upon error
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*/
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private function _dispatch_request($url, $args) {
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static $transports = null;
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if ( is_null($transports) )
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$transports = array();
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do_action( 'http_api_debug', $response, 'response', get_class( $transport ) );
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$request_order = isset($r['blocking']) && !$r['blocking'] ?
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array('curl', 'streams', 'fsockopen', 'exthttp') : // non-blocking order
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array('exthttp', 'curl', 'streams', 'fsockopen'); // blocking order
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if ( ! is_wp_error( $response ) )
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return apply_filters( 'http_response', $response, $r, $url );
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// Loop over each transport on each HTTP request looking for one which will serve this requests needs
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foreach ( $request_order as $transport ) {
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$class = 'WP_HTTP_' . $transport;
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// Check to see if this transport is a possibility, calls the transport statically
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if ( ! call_user_func( array($class, 'test'), $args, $url) )
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continue;
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// Transport claims to support request, Instantate it and give it a whirl.
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if ( empty( $transports[ $transport ] ) )
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$transports[ $transport ] = new $class;
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$response = $transports[ $transport ]->request( $url, $args );
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do_action( 'http_api_debug', $response, 'response', $class );
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if ( is_wp_error( $response ) )
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return $response;
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return apply_filters( 'http_response', $response, $args, $url );
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}
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return $response;
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return new WP_Error('http_failure', __('There are no HTTP transports available which can complete the requested request.') );
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}
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/**
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@ -328,7 +236,7 @@ class WP_Http {
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*
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* @param string $url URI resource.
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* @param str|array $args Optional. Override the defaults.
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* @return boolean
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* @return array|object Array containing 'headers', 'body', 'response', 'cookies'. A WP_Error instance upon error
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*/
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function post($url, $args = array()) {
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$defaults = array('method' => 'POST');
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@ -346,7 +254,7 @@ class WP_Http {
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*
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* @param string $url URI resource.
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* @param str|array $args Optional. Override the defaults.
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* @return boolean
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* @return array|object Array containing 'headers', 'body', 'response', 'cookies'. A WP_Error instance upon error
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*/
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function get($url, $args = array()) {
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$defaults = array('method' => 'GET');
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@ -364,7 +272,7 @@ class WP_Http {
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*
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* @param string $url URI resource.
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* @param str|array $args Optional. Override the defaults.
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* @return boolean
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* @return array|object Array containing 'headers', 'body', 'response', 'cookies'. A WP_Error instance upon error
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*/
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function head($url, $args = array()) {
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$defaults = array('method' => 'HEAD');
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