1237 lines
38 KiB
PHP
1237 lines
38 KiB
PHP
<?php
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/**
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* Simple and uniform HTTP request API.
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*
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* Will eventually replace and standardize the WordPress HTTP requests made.
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*
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* @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal
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*
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* @package WordPress
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* @subpackage HTTP
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* @since 2.7
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* @author Jacob Santos <wordpress@santosj.name>
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*/
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/**
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* WordPress HTTP Class for managing HTTP Transports and making HTTP requests.
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*
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* This class is called for the functionality of making HTTP requests and should
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* replace Snoopy functionality, eventually. There is no available functionality
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* to add HTTP transport implementations, since most of the HTTP transports are
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* added and available for use.
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*
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* The exception is that cURL is not available as a transport and lacking an
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* implementation. It will be added later and should be a patch on the WordPress
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* Trac.
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*
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* There are no properties, because none are needed and for performance reasons.
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* Some of the functions are static and while they do have some overhead over
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* functions in PHP4, the purpose is maintainability. When PHP5 is finally the
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* requirement, it will be easy to add the static keyword to the code. It is not
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* as easy to convert a function to a method after enough code uses the old way.
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*
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* @package WordPress
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* @subpackage HTTP
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* @since 2.7
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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
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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 - Setup 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,
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* the class needs to be used for the static call.
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*
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* The transport are setup to save time. This should only be called once, so
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* the overhead should be fine.
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*
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* @since 2.7
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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
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* that object to be used later.
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*
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* The order for the GET/HEAD requests are Streams, HTTP Extension, Fopen,
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* and finally Fsockopen. fsockopen() is used last, because it has the most
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* overhead in its implementation. There isn't any real way around it, since
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* redirects have to be supported, much the same way the other transports
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* also handle redirects.
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*
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* There are currently issues with "localhost" not resolving correctly with
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* DNS. This may cause an error "failed to open stream: A connection attempt
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* failed because the connected party did not properly respond after a
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* period of time, or established connection failed because connected host
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* has failed to respond."
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*
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* @since 2.7
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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() && apply_filters('use_http_extension_transport', true) ) {
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$working_transport['exthttp'] = new WP_Http_ExtHttp();
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$blocking_transport[] = &$working_transport['exthttp'];
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} else if ( true === WP_Http_Curl::test() && apply_filters('use_curl_transport', true) ) {
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$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() && apply_filters('use_streams_transport', true) ) {
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$working_transport['streams'] = new WP_Http_Streams();
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$blocking_transport[] = &$working_transport['streams'];
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} else if ( true === WP_Http_Fopen::test() && apply_filters('use_fopen_transport', true) ) {
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$working_transport['fopen'] = new WP_Http_Fopen();
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$blocking_transport[] = &$working_transport['fopen'];
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} else if ( true === WP_Http_Fsockopen::test() && apply_filters('use_fsockopen_transport', true) ) {
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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', 'fopen', '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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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. The plain Fopen Transport can not be used
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* to send content, but the streams transport can. This is a limitation that
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* is addressed here, by just not including that transport.
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*
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* @since 2.7
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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() && apply_filters('use_http_extension_transport', true) ) {
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$working_transport['exthttp'] = new WP_Http_ExtHttp();
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$blocking_transport[] = &$working_transport['exthttp'];
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} else if ( true === WP_Http_Streams::test() && apply_filters('use_streams_transport', true) ) {
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$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() && apply_filters('use_fsockopen_transport', true) ) {
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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('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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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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* The body and headers are part of the arguments. The 'body' argument is
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* for the body and will accept either a string or an array. The 'headers'
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* argument should be an array, but a string is acceptable. If the 'body'
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* argument is an array, then it will automatically be escaped using
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* http_build_query().
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*
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* The only URI that are supported in the HTTP Transport implementation are
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* the HTTP and HTTPS protocols. HTTP and HTTPS are assumed so the server
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* might not know how to handle the send headers. Other protocols are
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* unsupported and most likely will fail.
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*
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* The defaults are 'method', 'timeout', 'redirection', 'httpversion',
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* 'blocking' and 'user-agent'.
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*
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* Accepted 'method' values are 'GET', 'POST', and 'HEAD', some transports
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* technically allow others, but should not be assumed. The 'timeout' is
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* used to sent how long the connection should stay open before failing when
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* no response. 'redirection' is used to track how many redirects were taken
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* and used to sent the amount for other transports, but not all transports
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* accept setting that value.
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*
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* The 'httpversion' option is used to sent the HTTP version and accepted
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* values are '1.0', and '1.1' and should be a string. Version 1.1 is not
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* supported, because of chunk response. The 'user-agent' option is the
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* user-agent and is used to replace the default user-agent, which is
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* 'WordPress/WP_Version', where WP_Version is the value from $wp_version.
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*
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* 'blocking' is the default, which is used to tell the transport, whether
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* it should halt PHP while it performs the request or continue regardless.
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* Actually, that isn't entirely correct. Blocking mode really just means
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* whether the fread should just pull what it can whenever it gets bytes or
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* if it should wait until it has enough in the buffer to read or finishes
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* reading the entire content. It doesn't actually always mean that PHP will
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* continue going after making the request.
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*
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* @access public
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* @since 2.7
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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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*/
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function request( $url, $args = array() ) {
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global $wp_version;
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$defaults = array(
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'method' => 'GET',
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'timeout' => apply_filters( 'http_request_timeout', 5),
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'redirection' => apply_filters( 'http_request_redirection_count', 5),
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'httpversion' => apply_filters( 'http_request_version', '1.0'),
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'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version ),
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'blocking' => true,
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'headers' => array(), 'body' => null
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);
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$r = wp_parse_args( $args, $defaults );
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$r = apply_filters( 'http_request_args', $r );
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if ( is_null( $r['headers'] ) )
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$r['headers'] = array();
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if ( ! is_array($r['headers']) ) {
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$processedHeaders = WP_Http::processHeaders($r['headers']);
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$r['headers'] = $processedHeaders['headers'];
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}
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if ( isset($r['headers']['User-Agent']) ) {
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$r['user-agent'] = $r['headers']['User-Agent'];
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unset($r['headers']['User-Agent']);
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}
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if ( isset($r['headers']['user-agent']) ) {
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$r['user-agent'] = $r['headers']['user-agent'];
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unset($r['headers']['user-agent']);
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}
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if ( is_null($r['body']) ) {
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$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($r['body'], null, '&');
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$r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option('blog_charset');
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$r['headers']['Content-Length'] = strlen($r['body']);
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}
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if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) )
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$r['headers']['Content-Length'] = strlen($r['body']);
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$transports = WP_Http::_postTransport($r);
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}
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$response = array( 'headers' => array(), 'body' => '', 'response' => array('code', 'message') );
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foreach( (array) $transports as $transport ) {
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$response = $transport->request($url, $r);
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if( !is_wp_error($response) )
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return $response;
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}
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return $response;
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}
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/**
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* Uses the POST HTTP method.
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*
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* Used for sending data that is expected to be in the body.
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*
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* @access public
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* @since 2.7
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*
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* @param string $url URI resource.
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* @param str|array $args Optional. Override the defaults.
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* @return boolean
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*/
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function post($url, $args = array()) {
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$defaults = array('method' => 'POST');
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$r = wp_parse_args( $args, $defaults );
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return $this->request($url, $r);
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}
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/**
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* Uses the GET HTTP method.
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*
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* Used for sending data that is expected to be in the body.
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*
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* @access public
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* @since 2.7
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*
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* @param string $url URI resource.
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* @param str|array $args Optional. Override the defaults.
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* @return boolean
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*/
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function get($url, $args = array()) {
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$defaults = array('method' => 'GET');
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$r = wp_parse_args( $args, $defaults );
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return $this->request($url, $r);
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}
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/**
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* Uses the HEAD HTTP method.
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*
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* Used for sending data that is expected to be in the body.
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*
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* @access public
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* @since 2.7
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*
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* @param string $url URI resource.
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* @param str|array $args Optional. Override the defaults.
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* @return boolean
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*/
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function head($url, $args = array()) {
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$defaults = array('method' => 'HEAD');
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$r = wp_parse_args( $args, $defaults );
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return $this->request($url, $r);
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}
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/**
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* Parses the responses and splits the parts into headers and body.
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*
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* @access public
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* @static
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* @since 2.7
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*
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* @param string $strResponse The full response string
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* @return array Array with 'headers' and 'body' keys.
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*/
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function processResponse($strResponse) {
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list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2);
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return array('headers' => $theHeaders, 'body' => $theBody);
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}
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/**
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* Transform header string into an array.
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*
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* If an array is given then it is assumed to be raw header data with
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* numeric keys with the headers as the values. No headers must be passed
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* that were already processed.
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*
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* @access public
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* @static
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* @since 2.7
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*
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* @param string|array $headers
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* @return array Processed string headers
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*/
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function processHeaders($headers) {
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if ( is_string($headers) )
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$headers = explode("\n", str_replace(array("\r\n", "\r"), "\n", $headers) );
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$response = array('code' => 0, 'message' => '');
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$newheaders = array();
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foreach ( $headers as $tempheader ) {
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if ( empty($tempheader) )
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continue;
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if ( false === strpos($tempheader, ':') ) {
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list( , $iResponseCode, $strResponseMsg) = explode(' ', $tempheader, 3);
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$response['code'] = $iResponseCode;
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$response['message'] = $strResponseMsg;
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continue;
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}
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list($key, $value) = explode(':', $tempheader, 2);
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if ( ! empty($value) )
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$newheaders[strtolower($key)] = trim($value);
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}
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return array('response' => $response, 'headers' => $newheaders);
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}
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/**
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* Decodes chunk transfer-encoding, based off the HTTP 1.1 specification.
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*
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* Based off the HTTP http_encoding_dechunk function. Does not support
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* UTF-8. Does not support returning footer headers. Shouldn't be too
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* difficult to support it though.
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*
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* @todo Add support for footer chunked headers.
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* @access public
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* @since 2.7
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* @static
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*
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* @param string $body Body content
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* @return bool|string|WP_Error False if not chunked encoded. WP_Error on failure. Chunked decoded body on success.
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*/
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function chunkTransferDecode($body) {
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$body = str_replace(array("\r\n", "\r"), "\n", $body);
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// The body is not chunked encoding or is malformed.
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if ( ! preg_match( '/^[0-9a-f]+(\s|\n)+/mi', trim($body) ) )
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return false;
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$parsedBody = '';
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//$parsedHeaders = array(); Unsupported
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$done = false;
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do {
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$hasChunk = (bool) preg_match( '/^([0-9a-f]+)(\s|\n)+/mi', $body, $match );
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if ( $hasChunk ) {
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if ( empty($match[1]) ) {
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return new WP_Error('http_chunked_decode', __('Does not appear to be chunked encoded or body is malformed.') );
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}
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$length = hexdec( $match[1] );
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$chunkLength = strlen( $match[0] );
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$strBody = substr($body, $chunkLength, $length);
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$parsedBody .= $strBody;
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$body = ltrim(str_replace(array($match[0], $strBody), '', $body), "\n");
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if( "0" == trim($body) ) {
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$done = true;
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return $parsedBody; // Ignore footer headers.
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break;
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}
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} else {
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return new WP_Error('http_chunked_decode', __('Does not appear to be chunked encoded or body is malformed.') );
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}
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} while ( false === $done );
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}
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}
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|
|
/**
|
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* HTTP request method uses fsockopen function to retrieve the url.
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*
|
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* This would be the preferred method, but the fsockopen implementation has the
|
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* most overhead of all the HTTP transport implementations.
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*
|
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* @package WordPress
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* @subpackage HTTP
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* @since 2.7
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*/
|
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class WP_Http_Fsockopen {
|
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/**
|
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* Send a HTTP request to a URI using fsockopen().
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*
|
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* Does not support non-blocking mode.
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*
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* @see WP_Http::request For default options descriptions.
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*
|
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* @since 2.7
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* @access public
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* @param string $url URI resource.
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* @param str|array $args Optional. Override the defaults.
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* @return array 'headers', 'body', and 'response' keys.
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*/
|
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function request($url, $args = array()) {
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$defaults = array(
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'method' => 'GET', 'timeout' => 5,
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'redirection' => 5, 'httpversion' => '1.0',
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'blocking' => true,
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'headers' => array(), 'body' => null
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);
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$r = wp_parse_args( $args, $defaults );
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if ( isset($r['headers']['User-Agent']) ) {
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$r['user-agent'] = $r['headers']['User-Agent'];
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unset($r['headers']['User-Agent']);
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} else if( isset($r['headers']['user-agent']) ) {
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$r['user-agent'] = $r['headers']['user-agent'];
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unset($r['headers']['user-agent']);
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}
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$iError = null; // Store error number
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$strError = null; // Store error string
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$arrURL = parse_url($url);
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$secure_transport = false;
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if ( ! isset($arrURL['port']) ) {
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if ( ($arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https') && extension_loaded('openssl') ) {
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$arrURL['host'] = 'ssl://' . $arrURL['host'];
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$arrURL['port'] = apply_filters('http_request_port', 443);
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$secure_transport = true;
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} else {
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$arrURL['port'] = apply_filters('http_request_default_port', 80);
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}
|
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} 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);
|
|
|
|
$startDelay = time();
|
|
|
|
if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) )
|
|
$handle = @fsockopen($arrURL['host'], $arrURL['port'], $iError, $strError, $r['timeout'] );
|
|
else
|
|
$handle = fsockopen($arrURL['host'], $arrURL['port'], $iError, $strError, $r['timeout'] );
|
|
|
|
$endDelay = time();
|
|
|
|
// If the delay is greater than the timeout then fsockopen should't be
|
|
// used, because it will cause a long delay.
|
|
$elapseDelay = ($endDelay-$startDelay) > $r['timeout'];
|
|
if ( true === $elapseDelay )
|
|
add_option( 'disable_fsockopen', $endDelay, null, true );
|
|
|
|
if ( false === $handle )
|
|
return new WP_Error('http_request_failed', $iError . ': ' . $strError);
|
|
|
|
// WordPress supports PHP 4.3, which has this function. Removed sanity
|
|
// checking for performance reasons.
|
|
stream_set_timeout($handle, $r['timeout'] );
|
|
|
|
$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: ' . $arrURL['host'] . "\r\n";
|
|
|
|
if( isset($r['user-agent']) )
|
|
$strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n";
|
|
|
|
if ( is_array($r['headers']) ) {
|
|
foreach ( (array) $r['headers'] as $header => $headerValue )
|
|
$strHeaders .= $header . ': ' . $headerValue . "\r\n";
|
|
} else {
|
|
$strHeaders .= $r['headers'];
|
|
}
|
|
|
|
$strHeaders .= "\r\n";
|
|
|
|
if ( ! is_null($r['body']) )
|
|
$strHeaders .= $r['body'];
|
|
|
|
fwrite($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']);
|
|
|
|
// Is the response code within the 400 range?
|
|
if ( (int) $arrHeaders['response']['code'] >= 400 && (int) $arrHeaders['response']['code'] < 500 )
|
|
return new WP_Error('http_request_failed', $arrHeaders['response']['code'] . ': ' . $arrHeaders['response']['message']);
|
|
|
|
// If location is found, then assume redirect and redirect to location.
|
|
if ( isset($arrHeaders['headers']['location']) ) {
|
|
if ( $r['redirection']-- > 0 ) {
|
|
return $this->request($arrHeaders['headers']['location'], $r);
|
|
} else {
|
|
return new WP_Error('http_request_failed', __('Too many redirects.'));
|
|
}
|
|
}
|
|
|
|
// If the body was chunk encoded, then decode it.
|
|
if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] )
|
|
$process['body'] = WP_Http::chunkTransferDecode($process['body']);
|
|
|
|
return array('headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response']);
|
|
}
|
|
|
|
/**
|
|
* Whether this class can be used for retrieving an URL.
|
|
*
|
|
* @since 2.7
|
|
* @static
|
|
* @return boolean False means this class can not be used, true means it can.
|
|
*/
|
|
function test() {
|
|
if ( false !== ($option = get_option( 'disable_fsockopen' )) && time()-$option < 43200 ) // 12 hours
|
|
return false;
|
|
|
|
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 $args Optional. Override the defaults.
|
|
* @return array 'headers', 'body', and 'response' keys.
|
|
*/
|
|
function request($url, $args = array()) {
|
|
global $http_response_header;
|
|
|
|
$defaults = array(
|
|
'method' => 'GET', 'timeout' => 5,
|
|
'redirection' => 5, 'httpversion' => '1.0',
|
|
'blocking' => true,
|
|
'headers' => array(), 'body' => null
|
|
);
|
|
|
|
$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'), $url));
|
|
|
|
// WordPress supports PHP 4.3, which has this function. Removed sanity
|
|
// checking for performance reasons.
|
|
stream_set_timeout($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);
|
|
|
|
if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] )
|
|
$strResponse = WP_Http::chunkTransferDecode($strResponse);
|
|
|
|
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 $args Optional. Override the defaults.
|
|
* @return array 'headers', 'body', and 'response' keys.
|
|
*/
|
|
function request($url, $args = array()) {
|
|
$defaults = array(
|
|
'method' => 'GET', 'timeout' => 5,
|
|
'redirection' => 5, 'httpversion' => '1.0',
|
|
'blocking' => true,
|
|
'headers' => array(), 'body' => null
|
|
);
|
|
|
|
$r = wp_parse_args( $args, $defaults );
|
|
|
|
if ( isset($r['headers']['User-Agent']) ) {
|
|
$r['user-agent'] = $r['headers']['User-Agent'];
|
|
unset($r['headers']['User-Agent']);
|
|
} else if( isset($r['headers']['user-agent']) ) {
|
|
$r['user-agent'] = $r['headers']['user-agent'];
|
|
unset($r['headers']['user-agent']);
|
|
}
|
|
|
|
$arrURL = parse_url($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);
|
|
|
|
// Convert Header array to string.
|
|
$strHeaders = '';
|
|
if ( is_array( $r['headers'] ) )
|
|
foreach( $r['headers'] as $name => $value )
|
|
$strHeaders .= "{$name}: $value\r\n";
|
|
else if ( is_string( $r['headers'] ) )
|
|
$strHeaders = $r['headers'];
|
|
|
|
$arrContext = array('http' =>
|
|
array(
|
|
'method' => strtoupper($r['method']),
|
|
'user-agent' => $r['user-agent'],
|
|
'max_redirects' => $r['redirection'],
|
|
'protocol_version' => (float) $r['httpversion'],
|
|
'header' => $strHeaders,
|
|
'timeout' => $r['timeout']
|
|
)
|
|
);
|
|
|
|
if ( ! is_null($r['body']) && ! empty($r['body'] ) )
|
|
$arrContext['http']['content'] = $r['body'];
|
|
|
|
$context = stream_context_create($arrContext);
|
|
|
|
if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) )
|
|
$handle = @fopen($url, 'r', false, $context);
|
|
else
|
|
$handle = fopen($url, 'r', false, $context);
|
|
|
|
if ( ! $handle)
|
|
return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url));
|
|
|
|
// WordPress supports PHP 4.3, which has this function. Removed sanity
|
|
// checking for performance reasons.
|
|
stream_set_timeout($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']);
|
|
|
|
if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] )
|
|
$strResponse = WP_Http::chunkTransferDecode($strResponse);
|
|
|
|
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 $args Optional. Override the defaults.
|
|
* @return array 'headers', 'body', and 'response' keys.
|
|
*/
|
|
function request($url, $args = array()) {
|
|
$defaults = array(
|
|
'method' => 'GET', 'timeout' => 5,
|
|
'redirection' => 5, 'httpversion' => '1.0',
|
|
'blocking' => true,
|
|
'headers' => array(), 'body' => null
|
|
);
|
|
|
|
$r = wp_parse_args( $args, $defaults );
|
|
|
|
if ( isset($r['headers']['User-Agent']) ) {
|
|
$r['user-agent'] = $r['headers']['User-Agent'];
|
|
unset($r['headers']['User-Agent']);
|
|
} else if( isset($r['headers']['user-agent']) ) {
|
|
$r['user-agent'] = $r['headers']['user-agent'];
|
|
unset($r['headers']['user-agent']);
|
|
}
|
|
|
|
switch ( $r['method'] ) {
|
|
case 'POST':
|
|
$r['method'] = HTTP_METH_POST;
|
|
break;
|
|
case 'HEAD':
|
|
$r['method'] = HTTP_METH_HEAD;
|
|
break;
|
|
case 'GET':
|
|
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' => $r['headers'],
|
|
);
|
|
|
|
if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) //Emits warning level notices for max redirects and timeouts
|
|
$strResponse = @http_request($r['method'], $url, $r['body'], $options, $info);
|
|
else
|
|
$strResponse = http_request($r['method'], $url, $r['body'], $options, $info); //Emits warning level notices for max redirects and timeouts
|
|
|
|
if ( false === $strResponse || ! empty($info['error']) ) //Error may still be set, Response may return headers or partial document, and error contains a reason the request was aborted, eg, timeout expired or max-redirects reached
|
|
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);
|
|
|
|
if ( ! empty( $theBody ) && isset( $theHeaders['headers']['transfer-encoding'] ) && 'chunked' == $theHeaders['headers']['transfer-encoding'] ) {
|
|
if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) )
|
|
$theBody = @http_chunked_decode($theBody);
|
|
else
|
|
$theBody = http_chunked_decode($theBody);
|
|
}
|
|
|
|
$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 $args Optional. Override the defaults.
|
|
* @return array 'headers', 'body', and 'response' keys.
|
|
*/
|
|
function request($url, $args = array()) {
|
|
$defaults = array(
|
|
'method' => 'GET', 'timeout' => 5,
|
|
'redirection' => 5, 'httpversion' => '1.0',
|
|
'blocking' => true,
|
|
'headers' => array(), 'body' => null
|
|
);
|
|
|
|
$r = wp_parse_args( $args, $defaults );
|
|
|
|
if ( isset($r['headers']['User-Agent']) ) {
|
|
$r['user-agent'] = $r['headers']['User-Agent'];
|
|
unset($r['headers']['User-Agent']);
|
|
} else if( isset($r['headers']['user-agent']) ) {
|
|
$r['user-agent'] = $r['headers']['user-agent'];
|
|
unset($r['headers']['user-agent']);
|
|
}
|
|
|
|
$handle = curl_init();
|
|
curl_setopt( $handle, CURLOPT_URL, $url);
|
|
|
|
if ( true === $r['blocking'] ) {
|
|
curl_setopt( $handle, CURLOPT_HEADER, true );
|
|
curl_setopt( $handle, CURLOPT_RETURNTRANSFER, 1 );
|
|
} else {
|
|
curl_setopt( $handle, CURLOPT_HEADER, false );
|
|
curl_setopt( $handle, CURLOPT_NOBODY, true );
|
|
curl_setopt( $handle, CURLOPT_RETURNTRANSFER, 0 );
|
|
}
|
|
|
|
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( $handle, CURLOPT_FOLLOWLOCATION, true );
|
|
|
|
if( ! is_null($r['headers']) )
|
|
curl_setopt( $handle, CURLOPT_HTTPHEADER, $r['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_exec( $handle );
|
|
curl_close( $handle );
|
|
return array( 'headers' => array(), 'body' => '', 'response' => array('code', 'message') );
|
|
}
|
|
|
|
$theResponse = curl_exec( $handle );
|
|
|
|
if ( !empty($theResponse) ) {
|
|
$headerLength = curl_getinfo($handle, CURLINFO_HEADER_SIZE);
|
|
$theHeaders = trim( substr($theResponse, 0, $headerLength) );
|
|
$theBody = substr( $theResponse, $headerLength );
|
|
if ( false !== strrpos($theHeaders, "\r\n\r\n") ) {
|
|
$headerParts = explode("\r\n\r\n", $theHeaders);
|
|
$theHeaders = $headerParts[ count($headerParts) -1 ];
|
|
}
|
|
$theHeaders = WP_Http::processHeaders($theHeaders);
|
|
} else {
|
|
if ( $curl_error = curl_error($handle) )
|
|
return new WP_Error('http_request_failed', $curl_error);
|
|
if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array(301, 302) ) )
|
|
return new WP_Error('http_request_failed', __('Too many redirects.'));
|
|
|
|
$theHeaders = array( 'headers' => array() );
|
|
$theBody = '';
|
|
}
|
|
$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' => array(), 'response' => array('code', 'message') );
|
|
* </code>
|
|
*
|
|
* All of the headers in $res['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']['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 2.7.0
|
|
*
|
|
* @param string $url Site URL to retrieve.
|
|
* @param array $args Optional. Override the defaults.
|
|
* @return string The body of the response
|
|
*/
|
|
function wp_remote_request($url, $args = array()) {
|
|
$objFetchSite = _wp_http_get_object();
|
|
return $objFetchSite->request($url, $args);
|
|
}
|
|
|
|
/**
|
|
* 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 $args Optional. Override the defaults.
|
|
* @return string The body of the response
|
|
*/
|
|
function wp_remote_get($url, $args = array()) {
|
|
$objFetchSite = _wp_http_get_object();
|
|
|
|
return $objFetchSite->get($url, $args);
|
|
}
|
|
|
|
/**
|
|
* 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 $args Optional. Override the defaults.
|
|
* @return string The body of the response
|
|
*/
|
|
function wp_remote_post($url, $args = array()) {
|
|
$objFetchSite = _wp_http_get_object();
|
|
return $objFetchSite->post($url, $args);
|
|
}
|
|
|
|
/**
|
|
* 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 $args Optional. Override the defaults.
|
|
* @return string The body of the response
|
|
*/
|
|
function wp_remote_head($url, $args = array()) {
|
|
$objFetchSite = _wp_http_get_object();
|
|
return $objFetchSite->head($url, $args);
|
|
}
|
|
|
|
/**
|
|
* 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'];
|
|
}
|
|
|
|
?>
|