WordPress 3.4

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

diff --git a/wp-includes/http.php b/wp-includes/http.php
index 02b8750847730782d9e0c35a9c938b7c67f05da8..dd9df6e73f69480b688ac6bd950411412722d637 100644 (file)
--- a/wp-includes/http.php
+++ b/wp-includes/http.php
@@ -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 +222,80 @@ 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.
+ *
+ * @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 ) )
+               return false;
+
+       @header( 'Access-Control-Allow-Origin: ' .  $origin );
+       @header( 'Access-Control-Allow-Credentials: true' );
+
+       return $origin;
+}
\ No newline at end of file