[Blimp Net] Add EngineAuthHandler.

blimp/net/engine_auth_handler.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "blimp/net/engine_auth_handler.h"
+
+#include "base/logging.h"
+#include "blimp/net/blimp_connection.h"
+#include "blimp/net/blimp_transport.h"
+#include "net/base/net_errors.h"
+
+namespace blimp {
+
+EngineAuthHandler::EngineAuthHandler(ConnectionHandler* connection_handler)
+    : connection_handler_(connection_handler) {
+  DCHECK(connection_handler_);
+}
+
+EngineAuthHandler::~EngineAuthHandler() {}
+
+void EngineAuthHandler::HandleConnection(
+    scoped_ptr<BlimpConnection> connection) {
+  DCHECK(connection);
+  DCHECK(!connection_);
+  connection_ = std::move(connection);
+  connection_->SetConnectionErrorObserver(this);
+  connection_->SetIncomingMessageProcessor(this);
+  // TODO(haibinlu): add timeout.
+}
+
+void EngineAuthHandler::OnConnectionError(int error) {
+  delete this;
+}
+
+void EngineAuthHandler::ProcessMessage(
+    scoped_ptr<BlimpMessage> message,
+    const net::CompletionCallback& callback) {
+  // Expecting the first message is START_CONNECTION request.
+  if (message->type() == BlimpMessage::START_CONNECTION) {
+    // TODO(haibinlu): check client token.
+    connection_handler_->HandleConnection(std::move(connection_));
+    callback.Run(net::OK);
+  }
+  delete this;
+}
+
+}  // namespace blimp