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WordPress/wp-includes/class-http.php
Dion Hulse 659a6b3838 Add some unit tests for WP_HTTP::parse_url() to cover the <PHP 5.4.7 compatibility alterations. 
These unit tests cover the expected vehaviour of certain combinations of URL's, but makes no attempt to test invalid URL structures, as PHP's behavious for invalid URL's is undefined (Some will be treated as paths, others fail, and it varies between PHP 5.4.7+ and <5.4.7).
This change also makes WP_HTTP::parse_url() protected in order to allow unit testing.
See #28001, #29886

Built from https://develop.svn.wordpress.org/trunk@29864


git-svn-id: http://core.svn.wordpress.org/trunk@29624 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2014-10-09 03:01:18 +00:00

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<?php
/**
* Simple and uniform HTTP request API.
*
* Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk
* decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.
*
* @link https://core.trac.wordpress.org/ticket/4779 HTTP API Proposal
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
*/
/**
* WordPress HTTP Class for managing HTTP Transports and making HTTP requests.
*
* This class is used to consistently make outgoing HTTP requests easy for developers
* while still being compatible with the many PHP configurations under which
* WordPress runs.
*
* Debugging includes several actions, which pass different variables for debugging the HTTP API.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
*/
class WP_Http {
/**
* Send an HTTP request to a URI.
*
* Please note: The only URI that are supported in the HTTP Transport implementation
* are the HTTP and HTTPS protocols.
*
* @access public
* @since 2.7.0
*
* @param string $url The request URL.
* @param string|array $args {
* Optional. Array or string of HTTP request arguments.
*
* @type string $method Request method. Accepts 'GET', 'POST', 'HEAD', or 'PUT'.
* Some transports technically allow others, but should not be
* assumed. Default 'GET'.
* @type int $timeout How long the connection should stay open in seconds. Default 5.
* @type int $redirection Number of allowed redirects. Not supported by all transports
* Default 5.
* @type string $httpversion Version of the HTTP protocol to use. Accepts '1.0' and '1.1'.
* Default '1.0'.
* @type string $user-agent User-agent value sent.
* Default WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ).
* @type bool $reject_unsafe_urls Whether to pass URLs through {@see wp_http_validate_url()}.
* Default false.
* @type bool $blocking Whether the calling code requires the result of the request.
* If set to false, the request will be sent to the remote server,
* and processing returned to the calling code immediately, the caller
* will know if the request succeeded or failed, but will not receive
* any response from the remote server. Default true.
* @type string|array $headers Array or string of headers to send with the request.
* Default empty array.
* @type array $cookies List of cookies to send with the request. Default empty array.
* @type string|array $body Body to send with the request. Default null.
* @type bool $compress Whether to compress the $body when sending the request.
* Default false.
* @type bool $decompress Whether to decompress a compressed response. If set to false and
* compressed content is returned in the response anyway, it will
* need to be separately decompressed. Default true.
* @type bool $sslverify Whether to verify SSL for the request. Default true.
* @type string sslcertificates Absolute path to an SSL certificate .crt file.
* Default ABSPATH . WPINC . '/certificates/ca-bundle.crt'.
* @type bool $stream Whether to stream to a file. If set to true and no filename was
* given, it will be droped it in the WP temp dir and its name will
* be set using the basename of the URL. Default false.
* @type string $filename Filename of the file to write to when streaming. $stream must be
* set to true. Default null.
* @type int $limit_response_size Size in bytes to limit the response to. Default null.
*
* }
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'.
* A WP_Error instance upon error.
*/
public function request( $url, $args = array() ) {
global $wp_version;
$defaults = array(
'method' => 'GET',
/**
* Filter the timeout value for an HTTP request.
*
* @since 2.7.0
*
* @param int $timeout_value Time in seconds until a request times out.
* Default 5.
*/
'timeout' => apply_filters( 'http_request_timeout', 5 ),
/**
* Filter the number of redirects allowed during an HTTP request.
*
* @since 2.7.0
*
* @param int $redirect_count Number of redirects allowed. Default 5.
*/
'redirection' => apply_filters( 'http_request_redirection_count', 5 ),
/**
* Filter the version of the HTTP protocol used in a request.
*
* @since 2.7.0
*
* @param string $version Version of HTTP used. Accepts '1.0' and '1.1'.
* Default '1.0'.
*/
'httpversion' => apply_filters( 'http_request_version', '1.0' ),
/**
* Filter the user agent value sent with an HTTP request.
*
* @since 2.7.0
*
* @param string $user_agent WordPress user agent string.
*/
'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ),
/**
* Filter whether to pass URLs through wp_http_validate_url() in an HTTP request.
*
* @since 3.6.0
*
* @param bool $pass_url Whether to pass URLs through wp_http_validate_url().
* Default false.
*/
'reject_unsafe_urls' => apply_filters( 'http_request_reject_unsafe_urls', false ),
'blocking' => true,
'headers' => array(),
'cookies' => array(),
'body' => null,
'compress' => false,
'decompress' => true,
'sslverify' => true,
'sslcertificates' => ABSPATH . WPINC . '/certificates/ca-bundle.crt',
'stream' => false,
'filename' => null,
'limit_response_size' => null,
);
// Pre-parse for the HEAD checks.
$args = wp_parse_args( $args );
// By default, Head requests do not cause redirections.
if ( isset($args['method']) && 'HEAD' == $args['method'] )
$defaults['redirection'] = 0;
$r = wp_parse_args( $args, $defaults );
/**
* Filter the arguments used in an HTTP request.
*
* @since 2.7.0
*
* @param array $r An array of HTTP request arguments.
* @param string $url The request URL.
*/
$r = apply_filters( 'http_request_args', $r, $url );
// The transports decrement this, store a copy of the original value for loop purposes.
if ( ! isset( $r['_redirection'] ) )
$r['_redirection'] = $r['redirection'];
/**
* Filter whether to preempt an HTTP request's return.
*
* Returning a truthy value to the filter will short-circuit
* the HTTP request and return early with that value.
*
* @since 2.9.0
*
* @param bool $preempt Whether to preempt an HTTP request return. Default false.
* @param array $r HTTP request arguments.
* @param string $url The request URL.
*/
$pre = apply_filters( 'pre_http_request', false, $r, $url );
if ( false !== $pre )
return $pre;
if ( function_exists( 'wp_kses_bad_protocol' ) ) {
if ( $r['reject_unsafe_urls'] )
$url = wp_http_validate_url( $url );
$url = wp_kses_bad_protocol( $url, array( 'http', 'https', 'ssl' ) );
}
$arrURL = @parse_url( $url );
if ( empty( $url ) || empty( $arrURL['scheme'] ) )
return new WP_Error('http_request_failed', __('A valid URL was not provided.'));
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'] = 'localhost' == $arrURL['host'] || ( isset( $homeURL['host'] ) && $homeURL['host'] == $arrURL['host'] );
unset( $homeURL );
/*
* If we are streaming to a file but no filename was given drop it in the WP temp dir
* and pick its name using the basename of the $url.
*/
if ( $r['stream'] && empty( $r['filename'] ) )
$r['filename'] = get_temp_dir() . basename( $url );
/*
* Force some settings if we are streaming to a file and check for existence and perms
* of destination directory.
*/
if ( $r['stream'] ) {
$r['blocking'] = true;
if ( ! wp_is_writable( dirname( $r['filename'] ) ) )
return new WP_Error( 'http_request_failed', __( 'Destination directory for file streaming does not exist or is not writable.' ) );
}
if ( is_null( $r['headers'] ) )
$r['headers'] = array();
if ( ! is_array( $r['headers'] ) ) {
$processedHeaders = WP_Http::processHeaders( $r['headers'], $url );
$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'] );
}
if ( '1.1' == $r['httpversion'] && !isset( $r['headers']['connection'] ) ) {
$r['headers']['connection'] = 'close';
}
// Construct Cookie: header if any cookies are set.
WP_Http::buildCookieHeader( $r );
// Avoid issues where mbstring.func_overload is enabled.
mbstring_binary_safe_encoding();
if ( ! isset( $r['headers']['Accept-Encoding'] ) ) {
if ( $encoding = WP_Http_Encoding::accept_encoding( $url, $r ) )
$r['headers']['Accept-Encoding'] = $encoding;
}
if ( ( ! is_null( $r['body'] ) && '' != $r['body'] ) || 'POST' == $r['method'] || 'PUT' == $r['method'] ) {
if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) {
$r['body'] = http_build_query( $r['body'], null, '&' );
if ( ! isset( $r['headers']['Content-Type'] ) )
$r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' );
}
if ( '' === $r['body'] )
$r['body'] = null;
if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) )
$r['headers']['Content-Length'] = strlen( $r['body'] );
}
$response = $this->_dispatch_request( $url, $r );
reset_mbstring_encoding();
if ( is_wp_error( $response ) )
return $response;
// Append cookies that were used in this request to the response
if ( ! empty( $r['cookies'] ) ) {
$cookies_set = wp_list_pluck( $response['cookies'], 'name' );
foreach ( $r['cookies'] as $cookie ) {
if ( ! in_array( $cookie->name, $cookies_set ) && $cookie->test( $url ) ) {
$response['cookies'][] = $cookie;
}
}
}
return $response;
}
/**
* Tests which transports are capable of supporting the request.
*
* @since 3.2.0
* @access private
*
* @param array $args Request arguments
* @param string $url URL to Request
*
* @return string|bool Class name for the first transport that claims to support the request. False if no transport claims to support the request.
*/
public function _get_first_available_transport( $args, $url = null ) {
/**
* Filter which HTTP transports are available and in what order.
*
* @since 3.7.0
*
* @param array $value Array of HTTP transports to check. Default array contains
* 'curl', and 'streams', in that order.
* @param array $args HTTP request arguments.
* @param string $url The URL to request.
*/
$request_order = apply_filters( 'http_api_transports', array( 'curl', 'streams' ), $args, $url );
// Loop over each transport on each HTTP request looking for one which will serve this request's needs.
foreach ( $request_order as $transport ) {
$class = 'WP_HTTP_' . $transport;
// Check to see if this transport is a possibility, calls the transport statically.
if ( !call_user_func( array( $class, 'test' ), $args, $url ) )
continue;
return $class;
}
return false;
}
/**
* Dispatches a HTTP request to a supporting transport.
*
* Tests each transport in order to find a transport which matches the request arguments.
* Also caches the transport instance to be used later.
*
* The order for requests is cURL, and then PHP Streams.
*
* @since 3.2.0
* @access private
*
* @param string $url URL to Request
* @param array $args Request arguments
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
*/
private function _dispatch_request( $url, $args ) {
static $transports = array();
$class = $this->_get_first_available_transport( $args, $url );
if ( !$class )
return new WP_Error( 'http_failure', __( 'There are no HTTP transports available which can complete the requested request.' ) );
// Transport claims to support request, instantiate it and give it a whirl.
if ( empty( $transports[$class] ) )
$transports[$class] = new $class;
$response = $transports[$class]->request( $url, $args );
/**
* Fires after an HTTP API response is received and before the response is returned.
*
* @since 2.8.0
*
* @param array|WP_Error $response HTTP response or WP_Error object.
* @param string $context Context under which the hook is fired.
* @param string $class HTTP transport used.
* @param array $args HTTP request arguments.
* @param string $url The request URL.
*/
do_action( 'http_api_debug', $response, 'response', $class, $args, $url );
if ( is_wp_error( $response ) )
return $response;
/**
* Filter the HTTP API response immediately before the response is returned.
*
* @since 2.9.0
*
* @param array $response HTTP response.
* @param array $args HTTP request arguments.
* @param string $url The request URL.
*/
return apply_filters( 'http_response', $response, $args, $url );
}
/**
* 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 The request URL.
* @param string|array $args Optional. Override the defaults.
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
*/
public function post($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 The request URL.
* @param string|array $args Optional. Override the defaults.
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
*/
public function get($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 The request URL.
* @param string|array $args Optional. Override the defaults.
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
*/
public function head($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 $strResponse The full response string
* @return array Array with 'headers' and 'body' keys.
*/
public static function processResponse($strResponse) {
$res = explode("\r\n\r\n", $strResponse, 2);
return array('headers' => $res[0], 'body' => isset($res[1]) ? $res[1] : '');
}
/**
* 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
* @param string $url The URL that was requested
* @return array Processed string headers. If duplicate headers are encountered,
* Then a numbered array is returned as the value of that header-key.
*/
public static function processHeaders( $headers, $url = '' ) {
// Split headers, one per array element.
if ( is_string($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' => '');
/*
* If a redirection has taken place, The headers for each page request may have been passed.
* In this case, determine the final HTTP header and parse from there.
*/
for ( $i = count($headers)-1; $i >= 0; $i-- ) {
if ( !empty($headers[$i]) && false === strpos($headers[$i], ':') ) {
$headers = array_splice($headers, $i);
break;
}
}
$cookies = array();
$newheaders = array();
foreach ( (array) $headers as $tempheader ) {
if ( empty($tempheader) )
continue;
if ( false === strpos($tempheader, ':') ) {
$stack = explode(' ', $tempheader, 3);
$stack[] = '';
list( , $response['code'], $response['message']) = $stack;
continue;
}
list($key, $value) = explode(':', $tempheader, 2);
$key = strtolower( $key );
$value = trim( $value );
if ( isset( $newheaders[ $key ] ) ) {
if ( ! is_array( $newheaders[ $key ] ) )
$newheaders[$key] = array( $newheaders[ $key ] );
$newheaders[ $key ][] = $value;
} else {
$newheaders[ $key ] = $value;
}
if ( 'set-cookie' == $key )
$cookies[] = new WP_Http_Cookie( $value, $url );
}
// Cast the Response Code to an int
$response['code'] = intval( $response['code'] );
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 upgrades any basic name => value pairs to WP_Http_Cookie instances,
* 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 $r Full array of args passed into ::request()
*/
public static function buildCookieHeader( &$r ) {
if ( ! empty($r['cookies']) ) {
// Upgrade any name => value cookie pairs to WP_HTTP_Cookie instances.
foreach ( $r['cookies'] as $name => $value ) {
if ( ! is_object( $value ) )
$r['cookies'][ $name ] = new WP_HTTP_Cookie( array( 'name' => $name, 'value' => $value ) );
}
$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.
*
* @link http://tools.ietf.org/html/rfc2616#section-19.4.6 Process for chunked decoding.
*
* @access public
* @since 2.7.0
* @static
*
* @param string $body Body content
* @return string Chunked decoded body on success or raw body on failure.
*/
public static function chunkTransferDecode( $body ) {
// The body is not chunked encoded or is malformed.
if ( ! preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', trim( $body ) ) )
return $body;
$parsed_body = '';
// We'll be altering $body, so need a backup in case of error.
$body_original = $body;
while ( true ) {
$has_chunk = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $body, $match );
if ( ! $has_chunk || empty( $match[1] ) )
return $body_original;
$length = hexdec( $match[1] );
$chunk_length = strlen( $match[0] );
// Parse out the chunk of data.
$parsed_body .= substr( $body, $chunk_length, $length );
// Remove the chunk from the raw data.
$body = substr( $body, $length + $chunk_length );
// End of the document.
if ( '0' === trim( $body ) )
return $parsed_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 as true 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, wildcard domains
* are supported, eg *.wordpress.org will allow for all subdomains of wordpress.org to be contacted.
*
* @since 2.8.0
* @link https://core.trac.wordpress.org/ticket/8927 Allow preventing external requests.
* @link https://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_ACCESSIBLE_HOSTS
*
* @param string $uri URI of url.
* @return bool True to block, false to allow.
*/
public function block_request($uri) {
// We don't need to block requests, because nothing is blocked.
if ( ! defined( 'WP_HTTP_BLOCK_EXTERNAL' ) || ! WP_HTTP_BLOCK_EXTERNAL )
return false;
$check = parse_url($uri);
if ( ! $check )
return true;
$home = parse_url( get_option('siteurl') );
// Don't block requests back to ourselves by default.
if ( 'localhost' == $check['host'] || ( isset( $home['host'] ) && $home['host'] == $check['host'] ) ) {
/**
* Filter whether to block local requests through the proxy.
*
* @since 2.8.0
*
* @param bool $block Whether to block local requests through proxy.
* Default false.
*/
return apply_filters( 'block_local_requests', false );
}
if ( !defined('WP_ACCESSIBLE_HOSTS') )
return true;
static $accessible_hosts;
static $wildcard_regex = false;
if ( null == $accessible_hosts ) {
$accessible_hosts = preg_split('|,\s*|', WP_ACCESSIBLE_HOSTS);
if ( false !== strpos(WP_ACCESSIBLE_HOSTS, '*') ) {
$wildcard_regex = array();
foreach ( $accessible_hosts as $host )
$wildcard_regex[] = str_replace( '\*', '.+', preg_quote( $host, '/' ) );
$wildcard_regex = '/^(' . implode('|', $wildcard_regex) . ')$/i';
}
}
if ( !empty($wildcard_regex) )
return !preg_match($wildcard_regex, $check['host']);
else
return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If it's in the array, then we can't access it.
}
/**
* A wrapper for PHP's parse_url() function that handles edgecases in < PHP 5.4.7
*
* PHP 5.4.7 expanded parse_url()'s ability to handle non-absolute url's, including
* schemeless and relative url's with :// in the path, this works around those limitations
* providing a standard output on PHP 5.2~5.4+.
*
* Error suppression is used as prior to PHP 5.3.3, an E_WARNING would be generated when URL parsing failed.
*
* @since 4.1.0
*
* @access protected
* @param string $url The URL to parse
* @return bool|array False on failure; Array of URL components on success; See parse_url()'s return values.
*/
protected static function parse_url( $url ) {
$parts = @parse_url( $url );
if ( ! $parts ) {
// < PHP 5.4.7 compat, trouble with relative paths including a scheme break in the path
if ( '/' == $url[0] && false !== strpos( $url, '://' ) ) {
// Since we know it's a relative path, prefix with a scheme/host placeholder and try again
if ( ! $parts = @parse_url( 'placeholder://placeholder' . $url ) ) {
return $parts;
}
// Remove the placeholder values
unset( $parts['scheme'], $parts['host'] );
} else {
return $parts;
}
}
// < PHP 5.4.7 compat, doesn't detect schemeless URL's host field
if ( '//' == substr( $url, 0, 2 ) && ! isset( $parts['host'] ) ) {
list( $parts['host'], $slashless_path ) = explode( '/', substr( $parts['path'], 2 ), 2 );
$parts['path'] = "/{$slashless_path}";
}
return $parts;
}
/**
* Converts a relative URL to an absolute URL relative to a given URL.
*
* If an Absolute URL is provided, no processing of that URL is done.
*
* @since 3.4.0
*
* @access public
* @param string $maybe_relative_path The URL which might be relative
* @param string $url The URL which $maybe_relative_path is relative to
* @return string An Absolute URL, in a failure condition where the URL cannot be parsed, the relative URL will be returned.
*/
public static function make_absolute_url( $maybe_relative_path, $url ) {
if ( empty( $url ) )
return $maybe_relative_path;
if ( ! $url_parts = WP_HTTP::parse_url( $url ) ) {
return $maybe_relative_path;
}
if ( ! $relative_url_parts = WP_HTTP::parse_url( $maybe_relative_path ) ) {
return $maybe_relative_path;
}
// Check for a scheme on the 'relative' url
if ( ! empty( $relative_url_parts['scheme'] ) ) {
return $maybe_relative_path;
}
$absolute_path = $url_parts['scheme'] . '://';
// Schemeless URL's will make it this far, so we check for a host in the relative url and convert it to a protocol-url
if ( isset( $relative_url_parts['host'] ) ) {
$absolute_path .= $relative_url_parts['host'];
if ( isset( $relative_url_parts['port'] ) )
$absolute_path .= ':' . $relative_url_parts['port'];
} else {
$absolute_path .= $url_parts['host'];
if ( isset( $url_parts['port'] ) )
$absolute_path .= ':' . $url_parts['port'];
}
// Start off with the Absolute URL path.
$path = ! empty( $url_parts['path'] ) ? $url_parts['path'] : '/';
// If it's a root-relative path, then great.
if ( ! empty( $relative_url_parts['path'] ) && '/' == $relative_url_parts['path'][0] ) {
$path = $relative_url_parts['path'];
// Else it's a relative path.
} elseif ( ! empty( $relative_url_parts['path'] ) ) {
// Strip off any file components from the absolute path.
$path = substr( $path, 0, strrpos( $path, '/' ) + 1 );
// Build the new path.
$path .= $relative_url_parts['path'];
// Strip all /path/../ out of the path.
while ( strpos( $path, '../' ) > 1 ) {
$path = preg_replace( '![^/]+/\.\./!', '', $path );
}
// Strip any final leading ../ from the path.
$path = preg_replace( '!^/(\.\./)+!', '', $path );
}
// Add the Query string.
if ( ! empty( $relative_url_parts['query'] ) )
$path .= '?' . $relative_url_parts['query'];
return $absolute_path . '/' . ltrim( $path, '/' );
}
/**
* Handles HTTP Redirects and follows them if appropriate.
*
* @since 3.7.0
*
* @param string $url The URL which was requested.
* @param array $args The Arguments which were used to make the request.
* @param array $response The Response of the HTTP request.
* @return false|object False if no redirect is present, a WP_HTTP or WP_Error result otherwise.
*/
public static function handle_redirects( $url, $args, $response ) {
// If no redirects are present, or, redirects were not requested, perform no action.
if ( ! isset( $response['headers']['location'] ) || 0 === $args['_redirection'] )
return false;
// Only perform redirections on redirection http codes.
if ( $response['response']['code'] > 399 || $response['response']['code'] < 300 )
return false;
// Don't redirect if we've run out of redirects.
if ( $args['redirection']-- <= 0 )
return new WP_Error( 'http_request_failed', __('Too many redirects.') );
$redirect_location = $response['headers']['location'];
// If there were multiple Location headers, use the last header specified.
if ( is_array( $redirect_location ) )
$redirect_location = array_pop( $redirect_location );
$redirect_location = WP_HTTP::make_absolute_url( $redirect_location, $url );
// POST requests should not POST to a redirected location.
if ( 'POST' == $args['method'] ) {
if ( in_array( $response['response']['code'], array( 302, 303 ) ) )
$args['method'] = 'GET';
}
// Include valid cookies in the redirect process.
if ( ! empty( $response['cookies'] ) ) {
foreach ( $response['cookies'] as $cookie ) {
if ( $cookie->test( $redirect_location ) )
$args['cookies'][] = $cookie;
}
}
return wp_remote_request( $redirect_location, $args );
}
/**
* Determines if a specified string represents an IP address or not.
*
* This function also detects the type of the IP address, returning either
* '4' or '6' to represent a IPv4 and IPv6 address respectively.
* This does not verify if the IP is a valid IP, only that it appears to be
* an IP address.
*
* @see http://home.deds.nl/~aeron/regex/ for IPv6 regex
*
* @since 3.7.0
* @static
*
* @param string $maybe_ip A suspected IP address
* @return integer|bool Upon success, '4' or '6' to represent a IPv4 or IPv6 address, false upon failure
*/
public static function is_ip_address( $maybe_ip ) {
if ( preg_match( '/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $maybe_ip ) )
return 4;
if ( false !== strpos( $maybe_ip, ':' ) && preg_match( '/^(((?=.*(::))(?!.*\3.+\3))\3?|([\dA-F]{1,4}(\3|:\b|$)|\2))(?4){5}((?4){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i', trim( $maybe_ip, ' []' ) ) )
return 6;
return false;
}
}
/**
* HTTP request method uses PHP Streams to retrieve the url.
*
* @since 2.7.0
* @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client().
*/
class WP_Http_Streams {
/**
* Send a HTTP request to a URI using PHP Streams.
*
* @see WP_Http::request For default options descriptions.
*
* @since 2.7.0
* @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client().
*
* @access public
* @param string $url The request URL.
* @param string|array $args Optional. Override the defaults.
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
*/
public function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} 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);
$connect_host = $arrURL['host'];
$secure_transport = ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' );
if ( ! isset( $arrURL['port'] ) ) {
if ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) {
$arrURL['port'] = 443;
$secure_transport = true;
} else {
$arrURL['port'] = 80;
}
}
// Always pass a Path, defaulting to the root in cases such as http://example.com
if ( ! isset( $arrURL['path'] ) ) {
$arrURL['path'] = '/';
}
if ( isset( $r['headers']['Host'] ) || isset( $r['headers']['host'] ) ) {
if ( isset( $r['headers']['Host'] ) )
$arrURL['host'] = $r['headers']['Host'];
else
$arrURL['host'] = $r['headers']['host'];
unset( $r['headers']['Host'], $r['headers']['host'] );
}
/*
* Certain versions of PHP have issues with 'localhost' and IPv6, It attempts to connect
* to ::1, which fails when the server is not set up for it. For compatibility, always
* connect to the IPv4 address.
*/
if ( 'localhost' == strtolower( $connect_host ) )
$connect_host = '127.0.0.1';
$connect_host = $secure_transport ? 'ssl://' . $connect_host : 'tcp://' . $connect_host;
$is_local = isset( $r['local'] ) && $r['local'];
$ssl_verify = isset( $r['sslverify'] ) && $r['sslverify'];
if ( $is_local ) {
/**
* Filter whether SSL should be verified for local requests.
*
* @since 2.8.0
*
* @param bool $ssl_verify Whether to verify the SSL connection. Default true.
*/
$ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify );
} elseif ( ! $is_local ) {
/**
* Filter whether SSL should be verified for non-local requests.
*
* @since 2.8.0
*
* @param bool $ssl_verify Whether to verify the SSL connection. Default true.
*/
$ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify );
}
$proxy = new WP_HTTP_Proxy();
$context = stream_context_create( array(
'ssl' => array(
'verify_peer' => $ssl_verify,
//'CN_match' => $arrURL['host'], // This is handled by self::verify_ssl_certificate()
'capture_peer_cert' => $ssl_verify,
'SNI_enabled' => true,
'cafile' => $r['sslcertificates'],
'allow_self_signed' => ! $ssl_verify,
)
) );
$timeout = (int) floor( $r['timeout'] );
$utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000;
$connect_timeout = max( $timeout, 1 );
// Store error number.
$connection_error = null;
// Store error string.
$connection_error_str = null;
if ( !WP_DEBUG ) {
// In the event that the SSL connection fails, silence the many PHP Warnings.
if ( $secure_transport )
$error_reporting = error_reporting(0);
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
$handle = @stream_socket_client( 'tcp://' . $proxy->host() . ':' . $proxy->port(), $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context );
else
$handle = @stream_socket_client( $connect_host . ':' . $arrURL['port'], $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context );
if ( $secure_transport )
error_reporting( $error_reporting );
} else {
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
$handle = stream_socket_client( 'tcp://' . $proxy->host() . ':' . $proxy->port(), $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context );
else
$handle = stream_socket_client( $connect_host . ':' . $arrURL['port'], $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context );
}
if ( false === $handle ) {
// SSL connection failed due to expired/invalid cert, or, OpenSSL configuration is broken.
if ( $secure_transport && 0 === $connection_error && '' === $connection_error_str )
return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) );
return new WP_Error('http_request_failed', $connection_error . ': ' . $connection_error_str );
}
// Verify that the SSL certificate is valid for this request.
if ( $secure_transport && $ssl_verify && ! $proxy->is_enabled() ) {
if ( ! self::verify_ssl_certificate( $handle, $arrURL['host'] ) )
return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) );
}
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'] : '' );
$strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n";
$include_port_in_host_header = (
( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) ||
( 'http' == $arrURL['scheme'] && 80 != $arrURL['port'] ) ||
( 'https' == $arrURL['scheme'] && 443 != $arrURL['port'] )
);
if ( $include_port_in_host_header ) {
$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'] ) {
stream_set_blocking( $handle, 0 );
fclose( $handle );
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
$strResponse = '';
$bodyStarted = false;
$keep_reading = true;
$block_size = 4096;
if ( isset( $r['limit_response_size'] ) )
$block_size = min( $block_size, $r['limit_response_size'] );
// If streaming to a file setup the file handle.
if ( $r['stream'] ) {
if ( ! WP_DEBUG )
$stream_handle = @fopen( $r['filename'], 'w+' );
else
$stream_handle = fopen( $r['filename'], 'w+' );
if ( ! $stream_handle )
return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) );
$bytes_written = 0;
while ( ! feof($handle) && $keep_reading ) {
$block = fread( $handle, $block_size );
if ( ! $bodyStarted ) {
$strResponse .= $block;
if ( strpos( $strResponse, "\r\n\r\n" ) ) {
$process = WP_Http::processResponse( $strResponse );
$bodyStarted = true;
$block = $process['body'];
unset( $strResponse );
$process['body'] = '';
}
}
$this_block_size = strlen( $block );
if ( isset( $r['limit_response_size'] ) && ( $bytes_written + $this_block_size ) > $r['limit_response_size'] )
$block = substr( $block, 0, ( $r['limit_response_size'] - $bytes_written ) );
$bytes_written_to_file = fwrite( $stream_handle, $block );
if ( $bytes_written_to_file != $this_block_size ) {
fclose( $handle );
fclose( $stream_handle );
return new WP_Error( 'http_request_failed', __( 'Failed to write request to temporary file.' ) );
}
$bytes_written += $bytes_written_to_file;
$keep_reading = !isset( $r['limit_response_size'] ) || $bytes_written < $r['limit_response_size'];
}
fclose( $stream_handle );
} else {
$header_length = 0;
while ( ! feof( $handle ) && $keep_reading ) {
$block = fread( $handle, $block_size );
$strResponse .= $block;
if ( ! $bodyStarted && strpos( $strResponse, "\r\n\r\n" ) ) {
$header_length = strpos( $strResponse, "\r\n\r\n" ) + 4;
$bodyStarted = true;
}
$keep_reading = ( ! $bodyStarted || !isset( $r['limit_response_size'] ) || strlen( $strResponse ) < ( $header_length + $r['limit_response_size'] ) );
}
$process = WP_Http::processResponse( $strResponse );
unset( $strResponse );
}
fclose( $handle );
$arrHeaders = WP_Http::processHeaders( $process['headers'], $url );
$response = array(
'headers' => $arrHeaders['headers'],
// Not yet processed.
'body' => null,
'response' => $arrHeaders['response'],
'cookies' => $arrHeaders['cookies'],
'filename' => $r['filename']
);
// Handle redirects.
if ( false !== ( $redirect_response = WP_HTTP::handle_redirects( $url, $r, $response ) ) )
return $redirect_response;
// 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'] );
if ( isset( $r['limit_response_size'] ) && strlen( $process['body'] ) > $r['limit_response_size'] )
$process['body'] = substr( $process['body'], 0, $r['limit_response_size'] );
$response['body'] = $process['body'];
return $response;
}
/**
* Verifies the received SSL certificate against it's Common Names and subjectAltName fields
*
* PHP's SSL verifications only verify that it's a valid Certificate, it doesn't verify if
* the certificate is valid for the hostname which was requested.
* This function verifies the requested hostname against certificate's subjectAltName field,
* if that is empty, or contains no DNS entries, a fallback to the Common Name field is used.
*
* IP Address support is included if the request is being made to an IP address.
*
* @since 3.7.0
* @static
*
* @param stream $stream The PHP Stream which the SSL request is being made over
* @param string $host The hostname being requested
* @return bool If the cerficiate presented in $stream is valid for $host
*/
public static function verify_ssl_certificate( $stream, $host ) {
$context_options = stream_context_get_options( $stream );
if ( empty( $context_options['ssl']['peer_certificate'] ) )
return false;
$cert = openssl_x509_parse( $context_options['ssl']['peer_certificate'] );
if ( ! $cert )
return false;
/*
* If the request is being made to an IP address, we'll validate against IP fields
* in the cert (if they exist)
*/
$host_type = ( WP_HTTP::is_ip_address( $host ) ? 'ip' : 'dns' );
$certificate_hostnames = array();
if ( ! empty( $cert['extensions']['subjectAltName'] ) ) {
$match_against = preg_split( '/,\s*/', $cert['extensions']['subjectAltName'] );
foreach ( $match_against as $match ) {
list( $match_type, $match_host ) = explode( ':', $match );
if ( $host_type == strtolower( trim( $match_type ) ) ) // IP: or DNS:
$certificate_hostnames[] = strtolower( trim( $match_host ) );
}
} elseif ( !empty( $cert['subject']['CN'] ) ) {
// Only use the CN when the certificate includes no subjectAltName extension.
$certificate_hostnames[] = strtolower( $cert['subject']['CN'] );
}
// Exact hostname/IP matches.
if ( in_array( strtolower( $host ), $certificate_hostnames ) )
return true;
// IP's can't be wildcards, Stop processing.
if ( 'ip' == $host_type )
return false;
// Test to see if the domain is at least 2 deep for wildcard support.
if ( substr_count( $host, '.' ) < 2 )
return false;
// Wildcard subdomains certs (*.example.com) are valid for a.example.com but not a.b.example.com.
$wildcard_host = preg_replace( '/^[^.]+\./', '*.', $host );
return in_array( strtolower( $wildcard_host ), $certificate_hostnames );
}
/**
* Whether this class can be used for retrieving a URL.
*
* @static
* @access public
* @since 2.7.0
* @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client().
*
* @return boolean False means this class can not be used, true means it can.
*/
public static function test( $args = array() ) {
if ( ! function_exists( 'stream_socket_client' ) )
return false;
$is_ssl = isset( $args['ssl'] ) && $args['ssl'];
if ( $is_ssl ) {
if ( ! extension_loaded( 'openssl' ) )
return false;
if ( ! function_exists( 'openssl_x509_parse' ) )
return false;
}
/**
* Filter whether streams can be used as a transport for retrieving a URL.
*
* @since 2.7.0
*
* @param bool $use_class Whether the class can be used. Default true.
* @param array $args Request arguments.
*/
return apply_filters( 'use_streams_transport', true, $args );
}
}
/**
* Deprecated HTTP Transport method which used fsockopen.
*
* This class is not used, and is included for backwards compatibility only.
* All code should make use of WP_HTTP directly through it's API.
*
* @see WP_HTTP::request
*
* @since 2.7.0
* @deprecated 3.7.0 Please use WP_HTTP::request() directly
*/
class WP_HTTP_Fsockopen extends WP_HTTP_Streams {
// For backwards compatibility for users who are using the class directly.
}
/**
* HTTP request method uses Curl extension to retrieve the url.
*
* Requires the Curl extension to be installed.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
*/
class WP_Http_Curl {
/**
* Temporary header storage for during requests.
*
* @since 3.2.0
* @access private
* @var string
*/
private $headers = '';
/**
* Temporary body storage for during requests.
*
* @since 3.6.0
* @access private
* @var string
*/
private $body = '';
/**
* The maximum amount of data to receive from the remote server.
*
* @since 3.6.0
* @access private
* @var int
*/
private $max_body_length = false;
/**
* The file resource used for streaming to file.
*
* @since 3.6.0
* @access private
* @var resource
*/
private $stream_handle = false;
/**
* Send a HTTP request to a URI using cURL extension.
*
* @access public
* @since 2.7.0
*
* @param string $url The request URL.
* @param string|array $args Optional. Override the defaults.
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
*/
public function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} 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 ) ) {
curl_setopt( $handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP );
curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() );
curl_setopt( $handle, CURLOPT_PROXYPORT, $proxy->port() );
if ( $proxy->use_authentication() ) {
curl_setopt( $handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY );
curl_setopt( $handle, CURLOPT_PROXYUSERPWD, $proxy->authentication() );
}
}
$is_local = isset($r['local']) && $r['local'];
$ssl_verify = isset($r['sslverify']) && $r['sslverify'];
if ( $is_local ) {
/** This filter is documented in wp-includes/class-http.php */
$ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify );
} elseif ( ! $is_local ) {
/** This filter is documented in wp-includes/class-http.php */
$ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify );
}
/*
* CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers. Have to use ceil since.
* a value of 0 will allow an unlimited timeout.
*/
$timeout = (int) ceil( $r['timeout'] );
curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $timeout );
curl_setopt( $handle, CURLOPT_TIMEOUT, $timeout );
curl_setopt( $handle, CURLOPT_URL, $url);
curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, ( $ssl_verify === true ) ? 2 : false );
curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify );
curl_setopt( $handle, CURLOPT_CAINFO, $r['sslcertificates'] );
curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] );
/*
* The option doesn't work with safe mode or when open_basedir is set, and there's
* a bug #17490 with redirected POST requests, so handle redirections outside Curl.
*/
curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, false );
if ( defined( 'CURLOPT_PROTOCOLS' ) ) // PHP 5.2.10 / cURL 7.19.4
curl_setopt( $handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS );
switch ( $r['method'] ) {
case 'HEAD':
curl_setopt( $handle, CURLOPT_NOBODY, true );
break;
case 'POST':
curl_setopt( $handle, CURLOPT_POST, true );
curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
break;
case 'PUT':
curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'PUT' );
curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
break;
default:
curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, $r['method'] );
if ( ! is_null( $r['body'] ) )
curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
break;
}
if ( true === $r['blocking'] ) {
curl_setopt( $handle, CURLOPT_HEADERFUNCTION, array( $this, 'stream_headers' ) );
curl_setopt( $handle, CURLOPT_WRITEFUNCTION, array( $this, 'stream_body' ) );
}
curl_setopt( $handle, CURLOPT_HEADER, false );
if ( isset( $r['limit_response_size'] ) )
$this->max_body_length = intval( $r['limit_response_size'] );
else
$this->max_body_length = false;
// If streaming to a file open a file handle, and setup our curl streaming handler.
if ( $r['stream'] ) {
if ( ! WP_DEBUG )
$this->stream_handle = @fopen( $r['filename'], 'w+' );
else
$this->stream_handle = fopen( $r['filename'], 'w+' );
if ( ! $this->stream_handle )
return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) );
} else {
$this->stream_handle = false;
}
if ( !empty( $r['headers'] ) ) {
// cURL expects full header strings in each element.
$headers = array();
foreach ( $r['headers'] as $name => $value ) {
$headers[] = "{$name}: $value";
}
curl_setopt( $handle, CURLOPT_HTTPHEADER, $headers );
}
if ( $r['httpversion'] == '1.0' )
curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 );
else
curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 );
/**
* Fires before the cURL request is executed.
*
* Cookies are not currently handled by the HTTP API. This action allows
* plugins to handle cookies themselves.
*
* @since 2.8.0
*
* @param resource &$handle The cURL handle returned by curl_init().
* @param array $r The HTTP request arguments.
* @param string $url The request URL.
*/
do_action_ref_array( 'http_api_curl', array( &$handle, $r, $url ) );
// We don't need to return the body, so don't. Just execute request and return.
if ( ! $r['blocking'] ) {
curl_exec( $handle );
if ( $curl_error = curl_error( $handle ) ) {
curl_close( $handle );
return new WP_Error( 'http_request_failed', $curl_error );
}
if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ) ) ) {
curl_close( $handle );
return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
}
curl_close( $handle );
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
curl_exec( $handle );
$theHeaders = WP_Http::processHeaders( $this->headers, $url );
$theBody = $this->body;
$this->headers = '';
$this->body = '';
$curl_error = curl_errno( $handle );
// If an error occurred, or, no response.
if ( $curl_error || ( 0 == strlen( $theBody ) && empty( $theHeaders['headers'] ) ) ) {
if ( CURLE_WRITE_ERROR /* 23 */ == $curl_error && $r['stream'] ) {
fclose( $this->stream_handle );
return new WP_Error( 'http_request_failed', __( 'Failed to write request to temporary file.' ) );
}
if ( $curl_error = curl_error( $handle ) ) {
curl_close( $handle );
return new WP_Error( 'http_request_failed', $curl_error );
}
if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ) ) ) {
curl_close( $handle );
return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
}
}
curl_close( $handle );
if ( $r['stream'] )
fclose( $this->stream_handle );
$response = array(
'headers' => $theHeaders['headers'],
'body' => null,
'response' => $theHeaders['response'],
'cookies' => $theHeaders['cookies'],
'filename' => $r['filename']
);
// Handle redirects.
if ( false !== ( $redirect_response = WP_HTTP::handle_redirects( $url, $r, $response ) ) )
return $redirect_response;
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) )
$theBody = WP_Http_Encoding::decompress( $theBody );
$response['body'] = $theBody;
return $response;
}
/**
* Grab the headers of the cURL request
*
* Each header is sent individually to this callback, so we append to the $header property for temporary storage
*
* @since 3.2.0
* @access private
* @return int
*/
private function stream_headers( $handle, $headers ) {
$this->headers .= $headers;
return strlen( $headers );
}
/**
* Grab the body of the cURL request
*
* The contents of the document are passed in chunks, so we append to the $body property for temporary storage.
* Returning a length shorter than the length of $data passed in will cause cURL to abort the request as "completed"
*
* @since 3.6.0
* @access private
* @return int
*/
private function stream_body( $handle, $data ) {
$data_length = strlen( $data );
if ( $this->max_body_length && ( strlen( $this->body ) + $data_length ) > $this->max_body_length )
$data = substr( $data, 0, ( $this->max_body_length - $data_length ) );
if ( $this->stream_handle ) {
$bytes_written = fwrite( $this->stream_handle, $data );
} else {
$this->body .= $data;
$bytes_written = $data_length;
}
// Upon event of this function returning less than strlen( $data ) curl will error with CURLE_WRITE_ERROR.
return $bytes_written;
}
/**
* 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.
*/
public static function test( $args = array() ) {
if ( ! function_exists( 'curl_init' ) || ! function_exists( 'curl_exec' ) )
return false;
$is_ssl = isset( $args['ssl'] ) && $args['ssl'];
if ( $is_ssl ) {
$curl_version = curl_version();
// Check whether this cURL version support SSL requests.
if ( ! (CURL_VERSION_SSL & $curl_version['features']) )
return false;
}
/**
* Filter whether cURL can be used as a transport for retrieving a URL.
*
* @since 2.7.0
*
* @param bool $use_class Whether the class can be used. Default true.
* @param array $args An array of request arguments.
*/
return apply_filters( 'use_curl_transport', true, $args );
}
}
/**
* 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.
*
* Please note that only BASIC authentication is supported by most transports.
* cURL MAY support more methods (such as NTLM authentication) depending on your environment.
*
* 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, wildcards using * are supported, eg. *.wordpress.org</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, *.wordpress.org');
* </code>
*
* @link https://core.trac.wordpress.org/ticket/4011 Proxy support ticket in WordPress.
* @link https://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_PROXY_BYPASS_HOSTS
* @since 2.8.0
*/
class WP_HTTP_Proxy {
/**
* Whether proxy connection should be used.
*
* @since 2.8.0
*
* @use WP_PROXY_HOST
* @use WP_PROXY_PORT
*
* @return bool
*/
public function is_enabled() {
return defined('WP_PROXY_HOST') && defined('WP_PROXY_PORT');
}
/**
* Whether authentication should be used.
*
* @since 2.8.0
*
* @use WP_PROXY_USERNAME
* @use WP_PROXY_PASSWORD
*
* @return bool
*/
public function use_authentication() {
return defined('WP_PROXY_USERNAME') && defined('WP_PROXY_PASSWORD');
}
/**
* Retrieve the host for the proxy server.
*
* @since 2.8.0
*
* @return string
*/
public function host() {
if ( defined('WP_PROXY_HOST') )
return WP_PROXY_HOST;
return '';
}
/**
* Retrieve the port for the proxy server.
*
* @since 2.8.0
*
* @return string
*/
public function port() {
if ( defined('WP_PROXY_PORT') )
return WP_PROXY_PORT;
return '';
}
/**
* Retrieve the username for proxy authentication.
*
* @since 2.8.0
*
* @return string
*/
public function username() {
if ( defined('WP_PROXY_USERNAME') )
return WP_PROXY_USERNAME;
return '';
}
/**
* Retrieve the password for proxy authentication.
*
* @since 2.8.0
*
* @return string
*/
public function password() {
if ( defined('WP_PROXY_PASSWORD') )
return WP_PROXY_PASSWORD;
return '';
}
/**
* Retrieve authentication string for proxy authentication.
*
* @since 2.8.0
*
* @return string
*/
public function authentication() {
return $this->username() . ':' . $this->password();
}
/**
* Retrieve header string for proxy authentication.
*
* @since 2.8.0
*
* @return string
*/
public function authentication_header() {
return 'Proxy-Authorization: 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 2.8.0
*
* @param string $uri URI to check.
* @return bool True, to send through the proxy and false if, the proxy should not be used.
*/
public 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') );
/**
* Filter whether to preempt sending the request through the proxy server.
*
* Returning false will bypass the proxy; returning true will send
* the request through the proxy. Returning null bypasses the filter.
*
* @since 3.5.0
*
* @param null $override Whether to override the request result. Default null.
* @param string $uri URL to check.
* @param array $check Associative array result of parsing the URI.
* @param array $home Associative array result of parsing the site URL.
*/
$result = apply_filters( 'pre_http_send_through_proxy', null, $uri, $check, $home );
if ( ! is_null( $result ) )
return $result;
if ( 'localhost' == $check['host'] || ( isset( $home['host'] ) && $home['host'] == $check['host'] ) )
return false;
if ( !defined('WP_PROXY_BYPASS_HOSTS') )
return true;
static $bypass_hosts;
static $wildcard_regex = false;
if ( null == $bypass_hosts ) {
$bypass_hosts = preg_split('|,\s*|', WP_PROXY_BYPASS_HOSTS);
if ( false !== strpos(WP_PROXY_BYPASS_HOSTS, '*') ) {
$wildcard_regex = array();
foreach ( $bypass_hosts as $host )
$wildcard_regex[] = str_replace( '\*', '.+', preg_quote( $host, '/' ) );
$wildcard_regex = '/^(' . implode('|', $wildcard_regex) . ')$/i';
}
}
if ( !empty($wildcard_regex) )
return !preg_match($wildcard_regex, $check['host']);
else
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
*/
class WP_Http_Cookie {
/**
* Cookie name.
*
* @since 2.8.0
* @var string
*/
public $name;
/**
* Cookie value.
*
* @since 2.8.0
* @var string
*/
public $value;
/**
* When the cookie expires.
*
* @since 2.8.0
* @var string
*/
public $expires;
/**
* Cookie URL path.
*
* @since 2.8.0
* @var string
*/
public $path;
/**
* Cookie Domain.
*
* @since 2.8.0
* @var string
*/
public $domain;
/**
* 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.
*
* @since 2.8.0
* @access public
*
* @param string|array $data {
* Raw cookie data as header string or data array.
*
* @type string $name Cookie name.
* @type mixed $value Value. Should NOT already be urlencoded.
* @type string|int $expires Optional. Unix timestamp or formatted date. Default null.
* @type string $path Optional. Path. Default '/'.
* @type string $domain Optional. Domain. Default host of parsed $requested_url.
* @type int $port Optional. Port. Default null.
* }
* @param string $requested_url The URL which the cookie was set on, used for default $domain
* and $port values.
*/
public function __construct( $data, $requested_url = '' ) {
if ( $requested_url )
$arrURL = @parse_url( $requested_url );
if ( isset( $arrURL['host'] ) )
$this->domain = $arrURL['host'];
$this->path = isset( $arrURL['path'] ) ? $arrURL['path'] : '/';
if ( '/' != substr( $this->path, -1 ) )
$this->path = dirname( $this->path ) . '/';
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 );
// Removes name=value from items.
array_shift( $pairs );
// Set everything else as a property.
foreach ( $pairs as $pair ) {
$pair = rtrim($pair);
// Handle the cookie ending in ; which results in a empty final pair.
if ( empty($pair) )
continue;
list( $key, $val ) = strpos( $pair, '=' ) ? explode( '=', $pair ) : array( $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.
foreach ( array( 'name', 'value', 'path', 'domain', 'port' ) as $field ) {
if ( isset( $data[ $field ] ) )
$this->$field = $data[ $field ];
}
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.
*/
public function test( $url ) {
if ( is_null( $this->name ) )
return false;
// Expires - if expired then nothing else matters.
if ( isset( $this->expires ) && 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'] : ( 'https' == $url['scheme'] ? 443 : 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 : null;
$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 ( !empty( $port ) && !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.
*/
public function getHeaderValue() {
if ( ! isset( $this->name ) || ! isset( $this->value ) )
return '';
/**
* Filter the header-encoded cookie value.
*
* @since 3.4.0
*
* @param string $value The cookie value.
* @param string $name The cookie name.
*/
return $this->name . '=' . apply_filters( 'wp_http_cookie_value', $this->value, $this->name );
}
/**
* Retrieve cookie header for usage in the rest of the WordPress HTTP API.
*
* @access public
* @since 2.8.0
*
* @return string
*/
public function getFullHeader() {
return 'Cookie: ' . $this->getHeaderValue();
}
}
/**
* Implementation for deflate and gzip transfer encodings.
*
* Includes RFC 1950, RFC 1951, and RFC 1952.
*
* @since 2.8.0
* @package WordPress
* @subpackage HTTP
*/
class WP_Http_Encoding {
/**
* Compress raw string using the deflate format.
*
* Supports the RFC 1951 standard.
*
* @since 2.8.0
*
* @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.
*/
public static 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 2.8.0
*
* @param string $compressed String to decompress.
* @param int $length The optional length of the compressed data.
* @return string|bool False on failure.
*/
public static function decompress( $compressed, $length = null ) {
if ( empty($compressed) )
return $compressed;
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 gzinflate()
* function cannot handle out of the box. The following function has been created from
* various snippets on the gzinflate() PHP documentation.
*
* Warning: Magic numbers within. Due to the potential different formats that the compressed
* data may be returned in, some "magic offsets" are needed to ensure proper decompression
* takes place. For a simple progmatic way to determine the magic offset in use, see:
* https://core.trac.wordpress.org/ticket/18273
*
* @since 2.8.1
* @link https://core.trac.wordpress.org/ticket/18273
* @link http://au2.php.net/manual/en/function.gzinflate.php#70875
* @link http://au2.php.net/manual/en/function.gzinflate.php#77336
*
* @param string $gzData String to decompress.
* @return string|bool False on failure.
*/
public static function compatible_gzinflate($gzData) {
// Compressed data might contain a full header, if so strip it for gzinflate().
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;
}
$decompressed = @gzinflate( substr($gzData, $i, -8) );
if ( false !== $decompressed )
return $decompressed;
}
// Compressed data from java.util.zip.Deflater amongst others.
$decompressed = @gzinflate( substr($gzData, 2) );
if ( false !== $decompressed )
return $decompressed;
return false;
}
/**
* What encoding types to accept and their priority values.
*
* @since 2.8.0
*
* @return string Types of encoding to accept.
*/
public static function accept_encoding( $url, $args ) {
$type = array();
$compression_enabled = WP_Http_Encoding::is_available();
if ( ! $args['decompress'] ) // Decompression specifically disabled.
$compression_enabled = false;
elseif ( $args['stream'] ) // Disable when streaming to file.
$compression_enabled = false;
elseif ( isset( $args['limit_response_size'] ) ) // If only partial content is being requested, we won't be able to decompress it.
$compression_enabled = false;
if ( $compression_enabled ) {
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';
}
/**
* Filter the allowed encoding types.
*
* @since 3.6.0
*
* @param array $type Encoding types allowed. Accepts 'gzinflate',
* 'gzuncompress', 'gzdecode'.
* @param string $url URL of the HTTP request.
* @param array $args HTTP request arguments.
*/
$type = apply_filters( 'wp_http_accept_encoding', $type, $url, $args );
return implode(', ', $type);
}
/**
* What encoding the content used when it was compressed to send in the headers.
*
* @since 2.8.0
*
* @return string Content-Encoding string to send in the header.
*/
public static function content_encoding() {
return 'deflate';
}
/**
* Whether the content be decoded based on the headers.
*
* @since 2.8.0
*
* @param array|string $headers All of the available headers.
* @return bool
*/
public static function should_decode($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 2.8.0
*
* @return bool
*/
public static function is_available() {
return ( function_exists('gzuncompress') || function_exists('gzdeflate') || function_exists('gzinflate') );
}
}
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