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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.
*
* @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
* @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.
*
* Debugging includes several actions, which pass different variables for debugging the HTTP API.
*
* <strong>http_transport_get_debug</strong> - gives working, nonblocking, and blocking transports.
*
* <strong>http_transport_post_debug</strong> - gives working, nonblocking, and blocking transports.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
*/
class WP_Http {
/**
* PHP4 style Constructor - Calls PHP5 Style Constructor
*
* @since 2.7.0
* @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 2.7.0
* @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 2.7.0
* @access private
*
* @param array $args Request args, default us an empty array
* @return object|null Null if no transports are available, HTTP transport object.
*/
function &_getTransport( $args = array() ) {
static $working_transport, $blocking_transport, $nonblocking_transport;
if ( is_null($working_transport) ) {
if ( true === WP_Http_ExtHttp::test($args) ) {
$working_transport['exthttp'] = new WP_Http_ExtHttp();
$blocking_transport[] = &$working_transport['exthttp'];
} else if ( true === WP_Http_Curl::test($args) ) {
$working_transport['curl'] = new WP_Http_Curl();
$blocking_transport[] = &$working_transport['curl'];
} else if ( true === WP_Http_Streams::test($args) ) {
$working_transport['streams'] = new WP_Http_Streams();
$blocking_transport[] = &$working_transport['streams'];
} else if ( true === WP_Http_Fopen::test($args) ) {
$working_transport['fopen'] = new WP_Http_Fopen();
$blocking_transport[] = &$working_transport['fopen'];
} else if ( true === WP_Http_Fsockopen::test($args) ) {
$working_transport['fsockopen'] = new WP_Http_Fsockopen();
$blocking_transport[] = &$working_transport['fsockopen'];
}
foreach ( array('curl', 'streams', 'fopen', 'fsockopen', 'exthttp') as $transport ) {
if ( isset($working_transport[$transport]) )
$nonblocking_transport[] = &$working_transport[$transport];
}
}
do_action( 'http_transport_get_debug', $working_transport, $blocking_transport, $nonblocking_transport );
if ( isset($args['blocking']) && !$args['blocking'] )
return $nonblocking_transport;
else
return $blocking_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 2.7.0
* @access private
*
* @param array $args Request args, default us an empty array
* @return object|null Null if no transports are available, HTTP transport object.
*/
function &_postTransport( $args = array() ) {
static $working_transport, $blocking_transport, $nonblocking_transport;
if ( is_null($working_transport) ) {
if ( true === WP_Http_ExtHttp::test($args) ) {
$working_transport['exthttp'] = new WP_Http_ExtHttp();
$blocking_transport[] = &$working_transport['exthttp'];
} else if ( true === WP_Http_Curl::test($args) ) {
$working_transport['curl'] = new WP_Http_Curl();
$blocking_transport[] = &$working_transport['curl'];
} else if ( true === WP_Http_Streams::test($args) ) {
$working_transport['streams'] = new WP_Http_Streams();
$blocking_transport[] = &$working_transport['streams'];
} else if ( true === WP_Http_Fsockopen::test($args) ) {
$working_transport['fsockopen'] = new WP_Http_Fsockopen();
$blocking_transport[] = &$working_transport['fsockopen'];
}
foreach ( array('curl', 'streams', 'fsockopen', 'exthttp') as $transport ) {
if ( isset($working_transport[$transport]) )
$nonblocking_transport[] = &$working_transport[$transport];
}
}
do_action( 'http_transport_post_debug', $working_transport, $blocking_transport, $nonblocking_transport );
if ( isset($args['blocking']) && !$args['blocking'] )
return $nonblocking_transport;
else
return $blocking_transport;
}
/**
* Send a HTTP request to a URI.
*
* The body and headers are part of the arguments. The 'body' argument is for the body and will
* accept either a string or an array. The 'headers' argument should be an array, but a string
* is acceptable. If the 'body' argument is an array, then it will automatically be escaped
* using http_build_query().
*
* 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 2.7.0
* @todo Refactor this code. The code in this method extends the scope of its original purpose
* and should be refactored to allow for cleaner abstraction and reduce duplication of the
* code. One suggestion is to create a class specifically for the arguments, however
* preliminary refactoring to this affect has affect more than just the scope of the
* arguments. Something to ponder at least.
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return array containing 'headers', 'body', 'response', 'cookies'
*/
function request( $url, $args = array() ) {
global $wp_version;
$defaults = array(
'method' => 'GET',
'timeout' => apply_filters( 'http_request_timeout', 5),
'redirection' => apply_filters( 'http_request_redirection_count', 5),
'httpversion' => apply_filters( 'http_request_version', '1.0'),
'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ),
'blocking' => true,
'headers' => array(),
'cookies' => array(),
'body' => null,
'compress' => false,
'decompress' => true,
'sslverify' => true
);
$r = wp_parse_args( $args, $defaults );
$r = apply_filters( 'http_request_args', $r, $url );
// Allow plugins to short-circuit the request
$pre = apply_filters( 'pre_http_request', false, $r, $url );
if ( false !== $pre )
return $pre;
$arrURL = parse_url($url);
if ( $this->block_request( $url ) )
return new WP_Error('http_request_failed', __('User has blocked requests through HTTP.'));
// Determine if this is a https call and pass that on to the transport functions
// so that we can blacklist the transports that do not support ssl verification
$r['ssl'] = $arrURL['scheme'] == 'https' || $arrURL['scheme'] == 'ssl';
// Determine if this request is to OUR install of WordPress
$homeURL = parse_url(get_bloginfo('url'));
$r['local'] = $homeURL['host'] == $arrURL['host'] || 'localhost' == $arrURL['host'];
unset($homeURL);
if ( is_null( $r['headers'] ) )
$r['headers'] = array();
if ( ! is_array($r['headers']) ) {
$processedHeaders = WP_Http::processHeaders($r['headers']);
$r['headers'] = $processedHeaders['headers'];
}
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
}
if ( isset($r['headers']['user-agent']) ) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set
WP_Http::buildCookieHeader( $r );
if ( WP_Http_Encoding::is_available() )
$r['headers']['Accept-Encoding'] = WP_Http_Encoding::accept_encoding();
if ( empty($r['body']) ) {
// Some servers fail when sending content without the content-length header being set.
// Also, to fix another bug, we only send when doing POST and PUT and the content-length
// header isn't already set.
if( ($r['method'] == 'POST' || $r['method'] == 'PUT') && ! isset($r['headers']['Content-Length']) )
$r['headers']['Content-Length'] = 0;
// The method is ambiguous, because we aren't talking about HTTP methods, the "get" in
// this case is simply that we aren't sending any bodies and to get the transports that
// don't support sending bodies along with those which do.
$transports = WP_Http::_getTransport($r);
} else {
if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) {
if ( ! version_compare(phpversion(), '5.1.2', '>=') )
$r['body'] = _http_build_query($r['body'], null, '&');
else
$r['body'] = http_build_query($r['body'], null, '&');
$r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option('blog_charset');
$r['headers']['Content-Length'] = strlen($r['body']);
}
if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) )
$r['headers']['Content-Length'] = strlen($r['body']);
// The method is ambiguous, because we aren't talking about HTTP methods, the "post" in
// this case is simply that we are sending HTTP body and to get the transports that do
// support sending the body. Not all do, depending on the limitations of the PHP core
// limitations.
$transports = WP_Http::_postTransport($r);
}
do_action( 'http_api_debug', $transports, 'transports_list' );
$response = array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
foreach ( (array) $transports as $transport ) {
$response = $transport->request($url, $r);
do_action( 'http_api_debug', $response, 'response', get_class($transport) );
if ( ! is_wp_error($response) )
return apply_filters( 'http_response', $response, $r, $url );
}
return $response;
}
/**
* Uses the POST HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return boolean
*/
function post($url, $args = array()) {
$defaults = array('method' => 'POST');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r);
}
/**
* Uses the GET HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return boolean
*/
function get($url, $args = array()) {
$defaults = array('method' => 'GET');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r);
}
/**
* Uses the HEAD HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return boolean
*/
function head($url, $args = array()) {
$defaults = array('method' => 'HEAD');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r);
}
/**
* Parses the responses and splits the parts into headers and body.
*
* @access public
* @static
* @since 2.7.0
*
* @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);
}
/**
* 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 2.7.0
*
* @param string|array $headers
* @return array Processed string headers. If duplicate headers are encountered,
* Then a numbered array is returned as the value of that header-key.
*/
function processHeaders($headers) {
// split headers, one per array element
if ( is_string($headers) ) {
// tolerate line terminator: CRLF = LF (RFC 2616 19.3)
$headers = str_replace("\r\n", "\n", $headers);
// unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>, <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2)
$headers = preg_replace('/\n[ \t]/', ' ', $headers);
// create the headers array
$headers = explode("\n", $headers);
}
$response = array('code' => 0, 'message' => '');
$cookies = array();
$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 ) ) {
$key = strtolower( $key );
if ( isset( $newheaders[$key] ) ) {
$newheaders[$key] = array( $newheaders[$key], trim( $value ) );
} else {
$newheaders[$key] = trim( $value );
}
if ( 'set-cookie' == strtolower( $key ) )
$cookies[] = new WP_Http_Cookie( $value );
}
}
return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies);
}
/**
* Takes the arguments for a ::request() and checks for the cookie array.
*
* If it's found, then it's assumed to contain WP_Http_Cookie objects, which are each parsed
* into strings and added to the Cookie: header (within the arguments array). Edits the array by
* reference.
*
* @access public
* @version 2.8.0
* @static
*
* @param array $r Full array of args passed into ::request()
*/
function buildCookieHeader( &$r ) {
if ( ! empty($r['cookies']) ) {
$cookies_header = '';
foreach ( (array) $r['cookies'] as $cookie ) {
$cookies_header .= $cookie->getHeaderValue() . '; ';
}
$cookies_header = substr( $cookies_header, 0, -2 );
$r['headers']['cookie'] = $cookies_header;
}
}
/**
* Decodes chunk transfer-encoding, based off the HTTP 1.1 specification.
*
* Based off the HTTP http_encoding_dechunk function. Does not support UTF-8. Does not support
* returning footer headers. Shouldn't be too difficult to support it though.
*
* @todo Add support for footer chunked headers.
* @access public
* @since 2.7.0
* @static
*
* @param string $body Body content
* @return string Chunked decoded body on success or raw body on failure.
*/
function chunkTransferDecode($body) {
$body = str_replace(array("\r\n", "\r"), "\n", $body);
// The body is not chunked encoding or is malformed.
if ( ! preg_match( '/^[0-9a-f]+(\s|\n)+/mi', trim($body) ) )
return $body;
$parsedBody = '';
//$parsedHeaders = array(); Unsupported
while ( true ) {
$hasChunk = (bool) preg_match( '/^([0-9a-f]+)(\s|\n)+/mi', $body, $match );
if ( $hasChunk ) {
if ( empty( $match[1] ) )
return $body;
$length = hexdec( $match[1] );
$chunkLength = strlen( $match[0] );
$strBody = substr($body, $chunkLength, $length);
$parsedBody .= $strBody;
$body = ltrim(str_replace(array($match[0], $strBody), '', $body), "\n");
if ( "0" == trim($body) )
return $parsedBody; // Ignore footer headers.
} else {
return $body;
}
}
}
/**
* Block requests through the proxy.
*
* Those who are behind a proxy and want to prevent access to certain hosts may do so. This will
* prevent plugins from working and core functionality, if you don't include api.wordpress.org.
*
* You block external URL requests by defining WP_HTTP_BLOCK_EXTERNAL in your wp-config.php file
* and this will only allow localhost and your blog to make requests. The constant
* WP_ACCESSIBLE_HOSTS will allow additional hosts to go through for requests. The format of the
* WP_ACCESSIBLE_HOSTS constant is a comma separated list of hostnames to allow.
*
* @since 2.8.0
* @link http://core.trac.wordpress.org/ticket/8927 Allow preventing external requests.
*
* @param string $uri URI of url.
* @return bool True to block, false to allow.
*/
function block_request($uri) {
// We don't need to block requests, because nothing is blocked.
if ( ! defined('WP_HTTP_BLOCK_EXTERNAL') || ( defined('WP_HTTP_BLOCK_EXTERNAL') && WP_HTTP_BLOCK_EXTERNAL == false ) )
return false;
// parse_url() only handles http, https type URLs, and will emit E_WARNING on failure.
// This will be displayed on blogs, which is not reasonable.
$check = @parse_url($uri);
/* Malformed URL, can not process, but this could mean ssl, so let through anyway.
*
* This isn't very security sound. There are instances where a hacker might attempt
* to bypass the proxy and this check. However, the reason for this behavior is that
* WordPress does not do any checking currently for non-proxy requests, so it is keeps with
* the default unsecure nature of the HTTP request.
*/
if ( $check === false )
return false;
$home = parse_url( get_option('siteurl') );
// Don't block requests back to ourselves by default
if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] )
return apply_filters('block_local_requests', false);
if ( !defined('WP_ACCESSIBLE_HOSTS') )
return true;
static $accessible_hosts;
if ( null == $accessible_hosts )
$accessible_hosts = preg_split('|,\s*|', WP_ACCESSIBLE_HOSTS);
return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If its in the array, then we can't access it.
}
}
/**
* 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 2.7.0
*/
class WP_Http_Fsockopen {
/**
* Send a HTTP request to a URI using fsockopen().
*
* Does not support non-blocking mode.
*
* @see WP_Http::request For default options descriptions.
*
* @since 2.7
* @access public
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return array 'headers', 'body', 'cookies' and 'response' keys.
*/
function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} else if( isset($r['headers']['user-agent']) ) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set
WP_Http::buildCookieHeader( $r );
$iError = null; // Store error number
$strError = null; // Store error string
$arrURL = parse_url($url);
$fsockopen_host = $arrURL['host'];
$secure_transport = false;
if ( ! isset( $arrURL['port'] ) ) {
if ( ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) && extension_loaded('openssl') ) {
$fsockopen_host = "ssl://$fsockopen_host";
$arrURL['port'] = 443;
$secure_transport = true;
} else {
$arrURL['port'] = 80;
}
}
//fsockopen has issues with 'localhost' with IPv6 with certain versions of PHP, It attempts to connect to ::1,
// which fails when the server is not setup for it. For compatibility, always connect to the IPv4 address.
if ( 'localhost' == strtolower($fsockopen_host) )
$fsockopen_host = '127.0.0.1';
// 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();
$proxy = new WP_HTTP_Proxy();
if ( !WP_DEBUG ) {
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
$handle = @fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] );
else
$handle = @fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] );
} else {
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
$handle = fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] );
else
$handle = fsockopen( $fsockopen_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);
$timeout = (int) floor( $r['timeout'] );
$utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000;
stream_set_timeout( $handle, $timeout, $utimeout );
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) //Some proxies require full URL in this field.
$requestPath = $url;
else
$requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' );
if ( empty($requestPath) )
$requestPath .= '/';
$strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n";
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
$strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n";
else
$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'];
}
if ( $proxy->use_authentication() )
$strHeaders .= $proxy->authentication_header() . "\r\n";
$strHeaders .= "\r\n";
if ( ! is_null($r['body']) )
$strHeaders .= $r['body'];
fwrite($handle, $strHeaders);
if ( ! $r['blocking'] ) {
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
$strResponse = '';
while ( ! feof($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']);
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders['headers']) )
$process['body'] = WP_Http_Encoding::decompress( $process['body'] );
return array('headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response'], 'cookies' => $arrHeaders['cookies']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @since 2.7.0
* @static
* @return boolean False means this class can not be used, true means it can.
*/
function test( $args = array() ) {
if ( false !== ($option = get_option( 'disable_fsockopen' )) && time()-$option < 43200 ) // 12 hours
return false;
$is_ssl = isset($args['ssl']) && $args['ssl'];
if ( ! $is_ssl && function_exists( 'fsockopen' ) )
$use = true;
elseif ( $is_ssl && extension_loaded('openssl') && function_exists( 'fsockopen' ) )
$use = true;
else
$use = false;
return apply_filters('use_fsockopen_transport', $use, $args);
}
}
/**
* 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 2.7.0
*/
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 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return array 'headers', 'body', 'cookies' and 'response' keys.
*/
function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$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 ( !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));
$timeout = (int) floor( $r['timeout'] );
$utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000;
stream_set_timeout( $handle, $timeout, $utimeout );
if ( ! $r['blocking'] ) {
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
$strResponse = '';
while ( ! feof($handle) )
$strResponse .= fread($handle, 4096);
if ( function_exists('stream_get_meta_data') ) {
$meta = stream_get_meta_data($handle);
$theHeaders = $meta['wrapper_data'];
if ( isset( $meta['wrapper_data']['headers'] ) )
$theHeaders = $meta['wrapper_data']['headers'];
} else {
//$http_response_header is a PHP reserved variable which is set in the current-scope when using the HTTP Wrapper
//see http://php.oregonstate.edu/manual/en/reserved.variables.httpresponseheader.php
$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);
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) )
$strResponse = WP_Http_Encoding::decompress( $strResponse );
return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @since 2.7.0
* @static
* @return boolean False means this class can not be used, true means it can.
*/
function test($args = array()) {
if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) )
return false;
$use = true;
//PHP does not verify SSL certs, We can only make a request via this transports if SSL Verification is turned off.
$is_ssl = isset($args['ssl']) && $args['ssl'];
if ( $is_ssl ) {
$is_local = isset($args['local']) && $args['local'];
$ssl_verify = isset($args['sslverify']) && $args['sslverify'];
if ( $is_local && true != apply_filters('https_local_ssl_verify', true) )
$use = true;
elseif ( !$is_local && true != apply_filters('https_ssl_verify', true) )
$use = true;
elseif ( !$ssl_verify )
$use = true;
else
$use = false;
}
return apply_filters('use_fopen_transport', $use, $args);
}
}
/**
* 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 2.7.0
*/
class WP_Http_Streams {
/**
* Send a HTTP request to a URI using streams with fopen().
*
* @access public
* @since 2.7.0
*
* @param string $url
* @param str|array $args Optional. Override the defaults.
* @return array 'headers', 'body', 'cookies' and 'response' keys.
*/
function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} else if( isset($r['headers']['user-agent']) ) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set
WP_Http::buildCookieHeader( $r );
$arrURL = parse_url($url);
if ( false === $arrURL )
return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url));
if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] )
$url = preg_replace('|^' . preg_quote($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'];
$is_local = isset($args['local']) && $args['local'];
$ssl_verify = isset($args['sslverify']) && $args['sslverify'];
if ( $is_local )
$ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify);
elseif ( ! $is_local )
$ssl_verify = apply_filters('https_ssl_verify', $ssl_verify);
$arrContext = array('http' =>
array(
'method' => strtoupper($r['method']),
'user_agent' => $r['user-agent'],
'max_redirects' => $r['redirection'],
'protocol_version' => (float) $r['httpversion'],
'header' => $strHeaders,
'timeout' => $r['timeout'],
'ssl' => array(
'verify_peer' => $ssl_verify,
'verify_host' => $ssl_verify
)
)
);
$proxy = new WP_HTTP_Proxy();
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) {
$arrContext['http']['proxy'] = 'tcp://' . $proxy->host() . ':' . $proxy->port();
$arrContext['http']['request_fulluri'] = true;
// We only support Basic authentication so this will only work if that is what your proxy supports.
if ( $proxy->use_authentication() )
$arrContext['http']['header'] .= $proxy->authentication_header() . "\r\n";
}
if ( ! is_null($r['body']) && ! empty($r['body'] ) )
$arrContext['http']['content'] = $r['body'];
$context = stream_context_create($arrContext);
if ( !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));
$timeout = (int) floor( $r['timeout'] );
$utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000;
stream_set_timeout( $handle, $timeout, $utimeout );
if ( ! $r['blocking'] ) {
stream_set_blocking($handle, 0);
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
$strResponse = stream_get_contents($handle);
$meta = stream_get_meta_data($handle);
fclose($handle);
$processedHeaders = array();
if ( isset( $meta['wrapper_data']['headers'] ) )
$processedHeaders = WP_Http::processHeaders($meta['wrapper_data']['headers']);
else
$processedHeaders = WP_Http::processHeaders($meta['wrapper_data']);
if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] )
$strResponse = WP_Http::chunkTransferDecode($strResponse);
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) )
$strResponse = WP_Http_Encoding::decompress( $strResponse );
return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @static
* @access public
* @since 2.7.0
*
* @return boolean False means this class can not be used, true means it can.
*/
function test($args = array()) {
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;
//HTTPS via Proxy was added in 5.1.0
$is_ssl = isset($args['ssl']) && $args['ssl'];
if ( $is_ssl && version_compare(PHP_VERSION, '5.1.0', '<') ) {
$proxy = new WP_HTTP_Proxy();
/**
* No URL check, as its not currently passed to the ::test() function
* In the case where a Proxy is in use, Just bypass this transport for HTTPS.
*/
if ( $proxy->is_enabled() )
return false;
}
return apply_filters('use_streams_transport', true, $args);
}
}
/**
* 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 2.7.0
*/
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 $args Optional. Override the defaults.
* @return array 'headers', 'body', 'cookies' and 'response' keys.
*/
function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} else if( isset($r['headers']['user-agent']) ) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set
WP_Http::buildCookieHeader( $r );
switch ( $r['method'] ) {
case 'POST':
$r['method'] = HTTP_METH_POST;
break;
case 'HEAD':
$r['method'] = HTTP_METH_HEAD;
break;
case 'PUT':
$r['method'] = HTTP_METH_PUT;
break;
case 'GET':
default:
$r['method'] = HTTP_METH_GET;
}
$arrURL = parse_url($url);
if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] )
$url = preg_replace('|^' . preg_quote($arrURL['scheme'], '|') . '|', 'http', $url);
$is_local = isset($args['local']) && $args['local'];
$ssl_verify = isset($args['sslverify']) && $args['sslverify'];
if ( $is_local )
$ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify);
elseif ( ! $is_local )
$ssl_verify = apply_filters('https_ssl_verify', $ssl_verify);
$r['timeout'] = (int) ceil( $r['timeout'] );
$options = array(
'timeout' => $r['timeout'],
'connecttimeout' => $r['timeout'],
'redirect' => $r['redirection'],
'useragent' => $r['user-agent'],
'headers' => $r['headers'],
'ssl' => array(
'verifypeer' => $ssl_verify,
'verifyhost' => $ssl_verify
)
);
// The HTTP extensions offers really easy proxy support.
$proxy = new WP_HTTP_Proxy();
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) {
$options['proxyhost'] = $proxy->host();
$options['proxyport'] = $proxy->port();
$options['proxytype'] = HTTP_PROXY_HTTP;
if ( $proxy->use_authentication() ) {
$options['proxyauth'] = $proxy->authentication();
$options['proxyauthtype'] = HTTP_AUTH_BASIC;
}
}
if ( !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
// 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.
if ( false === $strResponse || ! empty($info['error']) )
return new WP_Error('http_request_failed', $info['response_code'] . ': ' . $info['error']);
if ( ! $r['blocking'] )
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
list($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 ( !WP_DEBUG )
$theBody = @http_chunked_decode($theBody);
else
$theBody = http_chunked_decode($theBody);
}
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) )
$theBody = http_inflate( $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, 'cookies' => $theHeaders['cookies']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @static
* @since 2.7.0
*
* @return boolean False means this class can not be used, true means it can.
*/
function test($args = array()) {
return apply_filters('use_http_extension_transport', function_exists('http_request'), $args );
}
}
/**
* 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 2.7.0
*
* @param string $url
* @param str|array $args Optional. Override the defaults.
* @return array 'headers', 'body', 'cookies' and 'response' keys.
*/
function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} else if( isset($r['headers']['user-agent']) ) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set.
WP_Http::buildCookieHeader( $r );
$handle = curl_init();
// cURL offers really easy proxy support.
$proxy = new WP_HTTP_Proxy();
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) {
$isPHP5 = version_compare(PHP_VERSION, '5.0.0', '>=');
if ( $isPHP5 ) {
curl_setopt( $handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP );
curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() );
curl_setopt( $handle, CURLOPT_PROXYPORT, $proxy->port() );
} else {
curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() .':'. $proxy->port() );
}
if ( $proxy->use_authentication() ) {
if ( $isPHP5 )
curl_setopt( $handle, CURLOPT_PROXYAUTH, CURLAUTH_BASIC );
curl_setopt( $handle, CURLOPT_PROXYUSERPWD, $proxy->authentication() );
}
}
$is_local = isset($args['local']) && $args['local'];
$ssl_verify = isset($args['sslverify']) && $args['sslverify'];
if ( $is_local )
$ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify);
elseif ( ! $is_local )
$ssl_verify = apply_filters('https_ssl_verify', $ssl_verify);
// CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers. Have to use ceil since
// a value of 0 will allow an ulimited timeout.
$timeout = (int) ceil( $r['timeout'] );
curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $timeout );
curl_setopt( $handle, CURLOPT_TIMEOUT, $timeout );
curl_setopt( $handle, CURLOPT_URL, $url);
curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, $ssl_verify );
curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify );
curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] );
curl_setopt( $handle, CURLOPT_MAXREDIRS, $r['redirection'] );
switch ( $r['method'] ) {
case 'HEAD':
curl_setopt( $handle, CURLOPT_NOBODY, true );
break;
case 'POST':
curl_setopt( $handle, CURLOPT_POST, true );
curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
break;
case 'PUT':
curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'PUT' );
curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
break;
}
if ( true === $r['blocking'] )
curl_setopt( $handle, CURLOPT_HEADER, true );
else
curl_setopt( $handle, CURLOPT_HEADER, false );
// The option doesn't work with safe mode or when open_basedir is set.
if ( !ini_get('safe_mode') && !ini_get('open_basedir') )
curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, true );
if ( !empty( $r['headers'] ) ) {
// cURL expects full header strings in each element
$headers = array();
foreach ( $r['headers'] as $name => $value ) {
$headers[] = "{$name}: $value";
}
curl_setopt( $handle, CURLOPT_HTTPHEADER, $headers );
}
if ( $r['httpversion'] == '1.0' )
curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 );
else
curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 );
// Cookies are not handled by the HTTP API currently. Allow for plugin authors to handle it
// themselves... Although, it is somewhat pointless without some reference.
do_action_ref_array( 'http_api_curl', array(&$handle) );
// We don't need to return the body, so don't. Just execute request and return.
if ( ! $r['blocking'] ) {
curl_exec( $handle );
curl_close( $handle );
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
$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(), 'cookies' => array() );
$theBody = '';
}
$response = array();
$response['code'] = curl_getinfo( $handle, CURLINFO_HTTP_CODE );
$response['message'] = get_status_header_desc($response['code']);
curl_close( $handle );
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) )
$theBody = WP_Http_Encoding::decompress( $theBody );
return array('headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $response, 'cookies' => $theHeaders['cookies']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @static
* @since 2.7.0
*
* @return boolean False means this class can not be used, true means it can.
*/
function test($args = array()) {
if ( function_exists('curl_init') && function_exists('curl_exec') )
return apply_filters('use_curl_transport', true, $args);
return false;
}
}
/**
* Adds Proxy support to the WordPress HTTP API.
*
* There are caveats to proxy support. It requires that defines be made in the wp-config.php file to
* enable proxy support. There are also a few filters that plugins can hook into for some of the
* constants.
*
* The constants are as follows:
* <ol>
* <li>WP_PROXY_HOST - Enable proxy support and host for connecting.</li>
* <li>WP_PROXY_PORT - Proxy port for connection. No default, must be defined.</li>
* <li>WP_PROXY_USERNAME - Proxy username, if it requires authentication.</li>
* <li>WP_PROXY_PASSWORD - Proxy password, if it requires authentication.</li>
* <li>WP_PROXY_BYPASS_HOSTS - Will prevent the hosts in this list from going through the proxy.
* You do not need to have localhost and the blog host in this list, because they will not be passed
* through the proxy. The list should be presented in a comma separated list</li>
* </ol>
*
* An example can be as seen below.
* <code>
* define('WP_PROXY_HOST', '192.168.84.101');
* define('WP_PROXY_PORT', '8080');
* define('WP_PROXY_BYPASS_HOSTS', 'localhost, www.example.com');
* </code>
*
* @link http://core.trac.wordpress.org/ticket/4011 Proxy support ticket in WordPress.
* @since 2.8
*/
class WP_HTTP_Proxy {
/**
* Whether proxy connection should be used.
*
* @since 2.8
* @use WP_PROXY_HOST
* @use WP_PROXY_PORT
*
* @return bool
*/
function is_enabled() {
return defined('WP_PROXY_HOST') && defined('WP_PROXY_PORT');
}
/**
* Whether authentication should be used.
*
* @since 2.8
* @use WP_PROXY_USERNAME
* @use WP_PROXY_PASSWORD
*
* @return bool
*/
function use_authentication() {
return defined('WP_PROXY_USERNAME') && defined('WP_PROXY_PASSWORD');
}
/**
* Retrieve the host for the proxy server.
*
* @since 2.8
*
* @return string
*/
function host() {
if ( defined('WP_PROXY_HOST') )
return WP_PROXY_HOST;
return '';
}
/**
* Retrieve the port for the proxy server.
*
* @since 2.8
*
* @return string
*/
function port() {
if ( defined('WP_PROXY_PORT') )
return WP_PROXY_PORT;
return '';
}
/**
* Retrieve the username for proxy authentication.
*
* @since 2.8
*
* @return string
*/
function username() {
if ( defined('WP_PROXY_USERNAME') )
return WP_PROXY_USERNAME;
return '';
}
/**
* Retrieve the password for proxy authentication.
*
* @since 2.8
*
* @return string
*/
function password() {
if ( defined('WP_PROXY_PASSWORD') )
return WP_PROXY_PASSWORD;
return '';
}
/**
* Retrieve authentication string for proxy authentication.
*
* @since 2.8
*
* @return string
*/
function authentication() {
return $this->username() . ':' . $this->password();
}
/**
* Retrieve header string for proxy authentication.
*
* @since 2.8
*
* @return string
*/
function authentication_header() {
return 'Proxy-Authentication: Basic ' . base64_encode( $this->authentication() );
}
/**
* Whether URL should be sent through the proxy server.
*
* We want to keep localhost and the blog URL from being sent through the proxy server, because
* some proxies can not handle this. We also have the constant available for defining other
* hosts that won't be sent through the proxy.
*
* @uses WP_PROXY_BYPASS_HOSTS
* @since unknown
*
* @param string $uri URI to check.
* @return bool True, to send through the proxy and false if, the proxy should not be used.
*/
function send_through_proxy( $uri ) {
// parse_url() only handles http, https type URLs, and will emit E_WARNING on failure.
// This will be displayed on blogs, which is not reasonable.
$check = @parse_url($uri);
// Malformed URL, can not process, but this could mean ssl, so let through anyway.
if ( $check === false )
return true;
$home = parse_url( get_option('siteurl') );
if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] )
return false;
if ( !defined('WP_PROXY_BYPASS_HOSTS') )
return true;
static $bypass_hosts;
if ( null == $bypass_hosts )
$bypass_hosts = preg_split('|,\s*|', WP_PROXY_BYPASS_HOSTS);
return !in_array( $check['host'], $bypass_hosts );
}
}
/**
* Internal representation of a single cookie.
*
* Returned cookies are represented using this class, and when cookies are set, if they are not
* already a WP_Http_Cookie() object, then they are turned into one.
*
* @todo The WordPress convention is to use underscores instead of camelCase for function and method
* names. Need to switch to use underscores instead for the methods.
*
* @package WordPress
* @subpackage HTTP
* @since 2.8.0
* @author Beau Lebens
*/
class WP_Http_Cookie {
/**
* Cookie name.
*
* @since 2.8.0
* @var string
*/
var $name;
/**
* Cookie value.
*
* @since 2.8.0
* @var string
*/
var $value;
/**
* When the cookie expires.
*
* @since 2.8.0
* @var string
*/
var $expires;
/**
* Cookie URL path.
*
* @since 2.8.0
* @var string
*/
var $path;
/**
* Cookie Domain.
*
* @since 2.8.0
* @var string
*/
var $domain;
/**
* PHP4 style Constructor - Calls PHP5 Style Constructor.
*
* @access public
* @since 2.8.0
* @param string|array $data Raw cookie data.
*/
function WP_Http_Cookie( $data ) {
$this->__construct( $data );
}
/**
* Sets up this cookie object.
*
* The parameter $data should be either an associative array containing the indices names below
* or a header string detailing it.
*
* If it's an array, it should include the following elements:
* <ol>
* <li>Name</li>
* <li>Value - should NOT be urlencoded already.</li>
* <li>Expires - (optional) String or int (UNIX timestamp).</li>
* <li>Path (optional)</li>
* <li>Domain (optional)</li>
* </ol>
*
* @access public
* @since 2.8.0
*
* @param string|array $data Raw cookie data.
*/
function __construct( $data ) {
if ( is_string( $data ) ) {
// Assume it's a header string direct from a previous request
$pairs = explode( ';', $data );
// Special handling for first pair; name=value. Also be careful of "=" in value
$name = trim( substr( $pairs[0], 0, strpos( $pairs[0], '=' ) ) );
$value = substr( $pairs[0], strpos( $pairs[0], '=' ) + 1 );
$this->name = $name;
$this->value = urldecode( $value );
array_shift( $pairs ); //Removes name=value from items.
// Set everything else as a property
foreach ( $pairs as $pair ) {
if ( empty($pair) ) //Handles the cookie ending in ; which results in a empty final pair
continue;
list( $key, $val ) = explode( '=', $pair );
$key = strtolower( trim( $key ) );
if ( 'expires' == $key )
$val = strtotime( $val );
$this->$key = $val;
}
} else {
if ( !isset( $data['name'] ) )
return false;
// Set properties based directly on parameters
$this->name = $data['name'];
$this->value = isset( $data['value'] ) ? $data['value'] : '';
$this->path = isset( $data['path'] ) ? $data['path'] : '';
$this->domain = isset( $data['domain'] ) ? $data['domain'] : '';
if ( isset( $data['expires'] ) )
$this->expires = is_int( $data['expires'] ) ? $data['expires'] : strtotime( $data['expires'] );
else
$this->expires = null;
}
}
/**
* Confirms that it's OK to send this cookie to the URL checked against.
*
* Decision is based on RFC 2109/2965, so look there for details on validity.
*
* @access public
* @since 2.8.0
*
* @param string $url URL you intend to send this cookie to
* @return boolean TRUE if allowed, FALSE otherwise.
*/
function test( $url ) {
// Expires - if expired then nothing else matters
if ( time() > $this->expires )
return false;
// Get details on the URL we're thinking about sending to
$url = parse_url( $url );
$url['port'] = isset( $url['port'] ) ? $url['port'] : 80;
$url['path'] = isset( $url['path'] ) ? $url['path'] : '/';
// Values to use for comparison against the URL
$path = isset( $this->path ) ? $this->path : '/';
$port = isset( $this->port ) ? $this->port : 80;
$domain = isset( $this->domain ) ? strtolower( $this->domain ) : strtolower( $url['host'] );
if ( false === stripos( $domain, '.' ) )
$domain .= '.local';
// Host - very basic check that the request URL ends with the domain restriction (minus leading dot)
$domain = substr( $domain, 0, 1 ) == '.' ? substr( $domain, 1 ) : $domain;
if ( substr( $url['host'], -strlen( $domain ) ) != $domain )
return false;
// Port - supports "port-lists" in the format: "80,8000,8080"
if ( !in_array( $url['port'], explode( ',', $port) ) )
return false;
// Path - request path must start with path restriction
if ( substr( $url['path'], 0, strlen( $path ) ) != $path )
return false;
return true;
}
/**
* Convert cookie name and value back to header string.
*
* @access public
* @since 2.8.0
*
* @return string Header encoded cookie name and value.
*/
function getHeaderValue() {
if ( empty( $this->name ) || empty( $this->value ) )
return '';
return $this->name . '=' . urlencode( $this->value );
}
/**
* Retrieve cookie header for usage in the rest of the WordPress HTTP API.
*
* @access public
* @since 2.8.0
*
* @return string
*/
function getFullHeader() {
return 'Cookie: ' . $this->getHeaderValue();
}
}
/**
* Implementation for deflate and gzip transfer encodings.
*
* Includes RFC 1950, RFC 1951, and RFC 1952.
*
* @since 2.8
* @package WordPress
* @subpackage HTTP
*/
class WP_Http_Encoding {
/**
* Compress raw string using the deflate format.
*
* Supports the RFC 1951 standard.
*
* @since 2.8
*
* @param string $raw String to compress.
* @param int $level Optional, default is 9. Compression level, 9 is highest.
* @param string $supports Optional, not used. When implemented it will choose the right compression based on what the server supports.
* @return string|bool False on failure.
*/
function compress( $raw, $level = 9, $supports = null ) {
return gzdeflate( $raw, $level );
}
/**
* Decompression of deflated string.
*
* Will attempt to decompress using the RFC 1950 standard, and if that fails
* then the RFC 1951 standard deflate will be attempted. Finally, the RFC
* 1952 standard gzip decode will be attempted. If all fail, then the
* original compressed string will be returned.
*
* @since 2.8
*
* @param string $compressed String to decompress.
* @param int $length The optional length of the compressed data.
* @return string|bool False on failure.
*/
function decompress( $compressed, $length = null ) {
if ( false !== ( $decompressed = @gzinflate( $compressed ) ) )
return $decompressed;
if ( false !== ( $decompressed = WP_Http_Encoding::compatible_gzinflate( $compressed ) ) )
return $decompressed;
if ( false !== ( $decompressed = @gzuncompress( $compressed ) ) )
return $decompressed;
if ( function_exists('gzdecode') ) {
$decompressed = @gzdecode( $compressed );
if ( false !== $decompressed )
return $decompressed;
}
return $compressed;
}
/**
* Decompression of deflated string while staying compatible with the majority of servers.
*
* Certain Servers will return deflated data with headers which PHP's gziniflate()
* function cannot handle out of the box. The following function lifted from
* http://au2.php.net/manual/en/function.gzinflate.php#77336 will attempt to deflate
* the various return forms used.
*
* @since 2.8.1
* @link http://au2.php.net/manual/en/function.gzinflate.php#77336
*
* @param string $gzData String to decompress.
* @return string|bool False on failure.
*/
function compatible_gzinflate($gzData) {
if ( substr($gzData, 0, 3) == "\x1f\x8b\x08" ) {
$i = 10;
$flg = ord( substr($gzData, 3, 1) );
if ( $flg > 0 ) {
if ( $flg & 4 ) {
list($xlen) = unpack('v', substr($gzData, $i, 2) );
$i = $i + 2 + $xlen;
}
if ( $flg & 8 )
$i = strpos($gzData, "\0", $i) + 1;
if ( $flg & 16 )
$i = strpos($gzData, "\0", $i) + 1;
if ( $flg & 2 )
$i = $i + 2;
}
return gzinflate( substr($gzData, $i, -8) );
} else {
return false;
}
}
/**
* What encoding types to accept and their priority values.
*
* @since 2.8
*
* @return string Types of encoding to accept.
*/
function accept_encoding() {
$type = array();
if ( function_exists( 'gzinflate' ) )
$type[] = 'deflate;q=1.0';
if ( function_exists( 'gzuncompress' ) )
$type[] = 'compress;q=0.5';
if ( function_exists( 'gzdecode' ) )
$type[] = 'gzip;q=0.5';
return implode(', ', $type);
}
/**
* What enconding the content used when it was compressed to send in the headers.
*
* @since 2.8
*
* @return string Content-Encoding string to send in the header.
*/
function content_encoding() {
return 'deflate';
}
/**
* Whether the content be decoded based on the headers.
*
* @since 2.8
*
* @param array|string $headers All of the available headers.
* @return bool
*/
function should_decode($headers) {
if ( is_array( $headers ) ) {
if ( array_key_exists('content-encoding', $headers) && ! empty( $headers['content-encoding'] ) )
return true;
} else if ( is_string( $headers ) ) {
return ( stripos($headers, 'content-encoding:') !== false );
}
return false;
}
/**
* Whether decompression and compression are supported by the PHP version.
*
* Each function is tested instead of checking for the zlib extension, to
* ensure that the functions all exist in the PHP version and aren't
* disabled.
*
* @since 2.8
*
* @return bool
*/
function is_available() {
return ( function_exists('gzuncompress') || function_exists('gzdeflate') || function_exists('gzinflate') );
}
}
/**
* Returns the initialized WP_Http Object
*
* @since 2.7.0
* @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' => int, 'message' => string) );
* </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 $args Optional. Override the defaults.
* @return WP_Error|array The response or WP_Error on failure.
*/
function wp_remote_request($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 2.7.0
*
* @param string $url Site URL to retrieve.
* @param array $args Optional. Override the defaults.
* @return WP_Error|array The response or WP_Error on failure.
*/
function wp_remote_get($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 2.7.0
*
* @param string $url Site URL to retrieve.
* @param array $args Optional. Override the defaults.
* @return WP_Error|array The response or WP_Error on failure.
*/
function wp_remote_post($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 2.7.0
*
* @param string $url Site URL to retrieve.
* @param array $args Optional. Override the defaults.
* @return WP_Error|array The response or WP_Error on failure.
*/
function wp_remote_head($url, $args = array()) {
$objFetchSite = _wp_http_get_object();
return $objFetchSite->head($url, $args);
}
/**
* Retrieve only the headers from the raw response.
*
* @since 2.7.0
*
* @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 ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers']))
return array();
return $response['headers'];
}
/**
* Retrieve a single header by name from the raw response.
*
* @since 2.7.0
*
* @param array $response
* @param string $header Header name to retrieve value from.
* @return string The header value. Empty string on if incorrect parameter given, or if the header doesnt exist.
*/
function wp_remote_retrieve_header(&$response, $header) {
if ( is_wp_error($response) || ! 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 2.7.0
*
* @param array $response HTTP response.
* @return string the response code. Empty string on incorrect parameter given.
*/
function wp_remote_retrieve_response_code(&$response) {
if ( is_wp_error($response) || ! isset($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 2.7.0
*
* @param array $response HTTP response.
* @return string The response message. Empty string on incorrect parameter given.
*/
function wp_remote_retrieve_response_message(&$response) {
if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response']))
return '';
return $response['response']['message'];
}
/**
* Retrieve only the body from the raw response.
*
* @since 2.7.0
*
* @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 ( is_wp_error($response) || ! isset($response['body']) )
return '';
return $response['body'];
}
?>
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