Add a web socket client

runtime/bin/http.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * HTTP status codes.
  */
 interface HttpStatus {
   static final int CONTINUE = 100;
   static final int SWITCHING_PROTOCOLS = 101;
@@ skipping 370 matching lines @@
    * send. Calling any methods that will change the header after
    * having retrieved the output stream will throw an exception.
    */
   OutputStream get outputStream();
 
   /**
    * Detach the underlying socket from the HTTP server. When the
    * socket is detached the HTTP server will no longer perform any
    * operations on it.
    *
-   * This is normally used when a HTTP upgraded request is received
+   * This is normally used when a HTTP upgrade request is received
    * and the communication should continue with a different protocol.
    */
-  Socket detachSocket();
+  DetachedSocket detachSocket();
 }
 
 
 /**
  * HTTP client factory.
  */
 interface HttpClient default _HttpClient {
   static final int DEFAULT_HTTP_PORT = 80;
 
   HttpClient();
@@ skipping 73 matching lines @@
    * all headers of the response are received and data is ready to be
    * received.
    */
   void set onResponse(void callback(HttpClientResponse response));
 
   /**
    * Sets the handler that gets called if an error occurs while
    * connecting or processing the HTTP request.
    */
   void set onError(void callback(e));
+
+  /**
+   * Detach the underlying socket from the HTTP client. When the
+   * socket is detached the HTTP client will no longer perform any
+   * operations on it.
+   *
+   * This is normally used when a HTTP upgrade is negotiated and the
+   * communication should continue with a different protocol.
+   */
+  DetachedSocket detachSocket();
 }
 
 
 /**
  * HTTP request for a client connection.
  */
 interface HttpClientRequest default _HttpClientRequest {
   /**
    * Gets and sets the content length of the request. If the size of
    * the request is not known in advance set content length to -1,
@@ skipping 45 matching lines @@
   HttpHeaders get headers();
 
   /**
    * Returns the input stream for the response. This is used to read
    * the response data.
    */
   InputStream get inputStream();
 }
 
 
+/**
+ * When detaching a socket from either the [:HttpServer:] or the
+ * [:HttpClient:] due to a HTTP connection upgrade there might be
+ * unparsed data already read from the socket. This unparsed data
+ * together with the detached socket is returned in an instance of
+ * this class.
+ */
+interface DetachedSocket default _DetachedSocket {
+  Socket get socket();
+  List<int> get unparsedData();
+}
+
+
 class HttpException implements Exception {
   const HttpException([String this.message = ""]);
   String toString() => "HttpException: $message";
   final String message;
 }