Add HTTP proxy tunnel support

tests/standalone/io/socket_upgrade_to_secure_test.dart

 // Copyright (c) 2013, 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.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 import "package:expect/expect.dart";
 import "dart:async";
 import "dart:io";
 import "dart:isolate";
 
+const HOST_IP = "127.0.0.1";
 const HOST_NAME = "localhost";
 const CERTIFICATE = "localhost_cert";
 
 // This test creates a server and a client connects. After connecting
 // and an optional initial handshake the connection is secured by
 // upgrading to a secure connection The client then writes and the
 // server echos. When the server has finished its echo it
 // half-closes. When the client gets the close event is closes fully.
 //
 // The test can be run in different configurations based on
 // the boolean arguments:
 //
 // handshakeBeforeSecure
 // When this argument is true some initial clear text handshake is done
 // between client and server before the connection is secured. This argument
 // only makes sense when both listenSecure and connectSecure are false.
 //
 // postponeSecure
 // When this argument is false the securing of the server end will
 // happen as soon as the last byte of the handshake before securing
 // has been written. When this argument is true the securing of the
 // server will not happen until the first TLS handshake data has been
 // received from the client. This argument only takes effect when
 // handshakeBeforeSecure is true.
-void test(bool handshakeBeforeSecure,
+void test(bool hostnameInConnect,
+          bool handshakeBeforeSecure,
           [bool postponeSecure = false]) {
   ReceivePort port = new ReceivePort();
 
   const messageSize = 1000;
   const handshakeMessageSize = 100;
 
   List<int> createTestData() {
     List<int> data = new List<int>(messageSize);
     for (int i = 0; i < messageSize; i++) {
       data[i] = i & 0xff;
@@ skipping 93 matching lines @@
             completer.complete(null);
           }
         },
         onDone: () => Expect.fail("Should not be called")
     );
     socket.add(createHandshakeTestData());
     return completer.future;
   }
 
   Future<SecureSocket> connectClient(int port) {
+    var host = hostnameInConnect ? HOST_NAME : HOST_IP;
     if (!handshakeBeforeSecure) {
-      return Socket.connect(HOST_NAME, port).then((socket) {
-        return SecureSocket.secure(socket).then((secureSocket) {
+      return Socket.connect(host, port).then((socket) {
+        var future;
+        if (hostnameInConnect) {
+          future = SecureSocket.secure(socket);
+        } else {
+          future = SecureSocket.secure(socket, host: HOST_NAME);
+        }
+        return future.then((secureSocket) {
           Expect.throws(() => socket.add([0]));
           return secureSocket;
         });
       });
     } else {
-      return Socket.connect(HOST_NAME, port).then((socket) {
+      return Socket.connect(host, port).then((socket) {
         return runClientHandshake(socket).then((_) {
-            return SecureSocket.secure(socket).then((secureSocket) {
+            var future;
+            if (hostnameInConnect) {
+              future = SecureSocket.secure(socket);
+            } else {
+              future = SecureSocket.secure(socket, host: HOST_NAME);
+            }
+            return future.then((secureSocket) {
               Expect.throws(() => socket.add([0]));
               return secureSocket;
             });
         });
       });
     }
   }
 
   serverReady(server) {
     server.listen((client) {
@@ skipping 22 matching lines @@
 
   ServerSocket.bind(HOST_NAME, 0, 5).then(serverReady);
 }
 
 main() {
   Path scriptDir = new Path(new Options().script).directoryPath;
   Path certificateDatabase = scriptDir.append('pkcert');
   SecureSocket.initialize(database: certificateDatabase.toNativePath(),
                           password: 'dartdart',
                           useBuiltinRoots: false);
-  test(false);
-  test(true);
+  test(false, false);
+  test(true, false);
+  test(false, true);
   test(true, true);
+  test(false, true, true);
+  test(true, true, true);
 }