Wordpress 3.5.2

[autoinstalls/wordpress.git] / wp-includes / http.php

diff --git a/wp-includes/http.php b/wp-includes/http.php
index 02b8750847730782d9e0c35a9c938b7c67f05da8..a196f688b8031c5d1d5e4775454938435d20f490 100644 (file)
--- a/wp-includes/http.php
+++ b/wp-includes/http.php
@@ -19,7 +19,7 @@
  *
  * @return WP_Http HTTP Transport object.
  */
  *
  * @return WP_Http HTTP Transport object.
  */

-function &_wp_http_get_object() {
+function _wp_http_get_object() {

        static $http;
 
        if ( is_null($http) )
        static $http;
 
        if ( is_null($http) )


@@ -197,7 +197,7 @@ function wp_remote_retrieve_body(&$response) {
  * @since 3.2.0
  *
  * @param array  $capabilities Array of capabilities to test or a wp_remote_request() $args array.
  * @since 3.2.0
  *
  * @param array  $capabilities Array of capabilities to test or a wp_remote_request() $args array.

- * @param string $url Optional.  If given, will check if the URL requires SSL and adds that requirement to the capabilities array.
+ * @param string $url Optional. If given, will check if the URL requires SSL and adds that requirement to the capabilities array.

  *
  * @return bool
  */
  *
  * @return bool
  */


@@ -222,3 +222,153 @@ function wp_http_supports( $capabilities = array(), $url = null ) {
 
        return (bool) $objFetchSite->_get_first_available_transport( $capabilities );
 }
 
        return (bool) $objFetchSite->_get_first_available_transport( $capabilities );
 }

+
+/**
+ * Get the HTTP Origin of the current request.
+ *
+ * @since 3.4.0
+ *
+ * @return string URL of the origin. Empty string if no origin.
+ */
+function get_http_origin() {
+       $origin = '';
+       if ( ! empty ( $_SERVER[ 'HTTP_ORIGIN' ] ) )
+               $origin = $_SERVER[ 'HTTP_ORIGIN' ];
+
+       return apply_filters( 'http_origin', $origin );
+}
+
+/**
+ * Retrieve list of allowed http origins.
+ *
+ * @since 3.4.0
+ *
+ * @return array Array of origin URLs.
+ */
+function get_allowed_http_origins() {
+       $admin_origin = parse_url( admin_url() );
+       $home_origin = parse_url( home_url() );
+
+       // @todo preserve port?
+       $allowed_origins = array_unique( array(
+               'http://' . $admin_origin[ 'host' ],
+               'https://' . $admin_origin[ 'host' ],
+               'http://' . $home_origin[ 'host' ],
+               'https://' . $home_origin[ 'host' ],
+       ) );
+
+       return apply_filters( 'allowed_http_origins' , $allowed_origins );
+}
+
+/**
+ * Determines if the http origin is an authorized one.
+ *
+ * @since 3.4.0
+ *
+ * @param string Origin URL. If not provided, the value of get_http_origin() is used.
+ * @return bool True if the origin is allowed. False otherwise.
+ */
+function is_allowed_http_origin( $origin = null ) {
+       $origin_arg = $origin;
+
+       if ( null === $origin )
+               $origin = get_http_origin();
+
+       if ( $origin && ! in_array( $origin, get_allowed_http_origins() ) )
+               $origin = '';
+
+       return apply_filters( 'allowed_http_origin', $origin, $origin_arg );
+}
+
+/**
+ * Send Access-Control-Allow-Origin and related headers if the current request
+ * is from an allowed origin.
+ *
+ * If the request is an OPTIONS request, the script exits with either access
+ * control headers sent, or a 403 response if the origin is not allowed. For
+ * other request methods, you will receive a return value.
+ *
+ * @since 3.4.0
+ *
+ * @return bool|string Returns the origin URL if headers are sent. Returns false
+ * if headers are not sent.
+ */
+function send_origin_headers() {
+       $origin = get_http_origin();
+
+       if ( is_allowed_http_origin( $origin ) ) {
+               @header( 'Access-Control-Allow-Origin: ' .  $origin );
+               @header( 'Access-Control-Allow-Credentials: true' );
+               if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] )
+                       exit;
+               return $origin;
+       }
+
+       if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) {
+               status_header( 403 );
+               exit;
+       }
+
+       return false;
+}
+
+/**
+ * Validate a URL for safe use in the HTTP API.
+ *
+ * @since 3.5.2
+ *
+ * @return mixed URL or false on failure.
+ */
+function wp_http_validate_url( $url ) {
+       $url = esc_url_raw( $url, array( 'http', 'https' ) );
+       if ( ! $url )
+               return false;
+
+       $parsed_url = @parse_url( $url );
+       if ( ! $parsed_url )
+               return false;
+
+       if ( isset( $parsed_url['user'] ) || isset( $parsed_url['pass'] ) )
+               return false;
+
+       if ( false !== strpos( $parsed_url['host'], ':' ) )
+               return false;
+
+       $parsed_home = @parse_url( get_option( 'home' ) );
+
+       $same_host = strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] );
+
+       if ( ! $same_host ) {
+               $host = trim( $parsed_url['host'], '.' );
+               if ( preg_match( '#^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $host ) ) {
+                       $ip = $host;
+               } else {
+                       $ip = gethostbyname( $host );
+                       if ( $ip === $host ) // Error condition for gethostbyname()
+                               $ip = false;
+               }
+               if ( $ip ) {
+                       if ( '127.0.0.1' === $ip )
+                               return false;
+                       $parts = array_map( 'intval', explode( '.', $ip ) );
+                       if ( 10 === $parts[0] )
+                               return false;
+                       if ( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] )
+                               return false;
+                       if ( 192 === $parts[0] && 168 === $parts[1] )
+                               return false;
+               }
+       }
+
+       if ( empty( $parsed_url['port'] ) )
+               return $url;
+
+       $port = $parsed_url['port'];
+       if ( 80 === $port || 443 === $port || 8080 === $port )
+               return $url;
+
+       if ( $parsed_home && $same_host && $parsed_home['port'] === $port )
+               return $url;
+
+       return false;
+}