face: Implement WebSocket channel, face, and factory.

Change-Id: Ic4dbb1abdbbdbec028746ba14b11be8ab9cc1edb
Refs: #1468
diff --git a/daemon/face/websocket-factory.cpp b/daemon/face/websocket-factory.cpp
new file mode 100644
index 0000000..224a75b
--- /dev/null
+++ b/daemon/face/websocket-factory.cpp
@@ -0,0 +1,84 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014  Regents of the University of California,
+ *                     Arizona Board of Regents,
+ *                     Colorado State University,
+ *                     University Pierre & Marie Curie, Sorbonne University,
+ *                     Washington University in St. Louis,
+ *                     Beijing Institute of Technology,
+ *                     The University of Memphis
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+#include "websocket-factory.hpp"
+
+namespace nfd {
+
+using namespace boost::asio;
+
+NFD_LOG_INIT("WebSocketFactory");
+
+WebSocketFactory::WebSocketFactory(const std::string& defaultPort)
+  : m_defaultPort(defaultPort)
+{
+}
+
+shared_ptr<WebSocketChannel>
+WebSocketFactory::createChannel(const websocket::Endpoint& endpoint)
+{
+  shared_ptr<WebSocketChannel> channel = findChannel(endpoint);
+  if (static_cast<bool>(channel))
+    return channel;
+
+  channel = make_shared<WebSocketChannel>(boost::cref(endpoint));
+  m_channels[endpoint] = channel;
+
+  return channel;
+}
+
+shared_ptr<WebSocketChannel>
+WebSocketFactory::createChannel(const std::string& localIPAddress,
+                                uint16_t localPort)
+{
+  boost::system::error_code ec;
+  ip::address address = ip::address::from_string(localIPAddress, ec);
+  if (ec)
+    {
+      throw Error("Invalid address format: " + localIPAddress);
+    }
+  websocket::Endpoint endpoint(address, localPort);
+  return createChannel(endpoint);
+}
+
+shared_ptr<WebSocketChannel>
+WebSocketFactory::findChannel(const websocket::Endpoint& localEndpoint)
+{
+  ChannelMap::iterator i = m_channels.find(localEndpoint);
+  if (i != m_channels.end())
+    return i->second;
+  else
+    return shared_ptr<WebSocketChannel>();
+}
+
+void
+WebSocketFactory::createFace(const FaceUri& uri,
+                             const FaceCreatedCallback& onCreated,
+                             const FaceConnectFailedCallback& onConnectFailed)
+{
+  throw Error("WebSocketFactory does not support 'createFace' operation");
+}
+
+} // namespace nfd