Implement parts of the Mojo TCP interfaces.

mojo/examples/http_server/http_server.cc

+// Copyright 2014 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 <stdio.h>
+
+#include "base/bind.h"
+#include "mojo/public/c/system/main.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/application/application_runner.h"
+#include "mojo/public/cpp/utility/run_loop.h"

[yzshen1, 2014/10/07 20:14:34]

nit: this is not needed.

+#include "mojo/services/public/interfaces/network/network_service.mojom.h"
+
+namespace mojo {
+namespace examples {
+
+class HttpServerApp : public ApplicationDelegate {
+ public:
+  virtual void Initialize(ApplicationImpl* app) override {
+    app->ConnectToService("mojo:mojo_network_service", &network_service_);
+    Start();
+  }
+
+ private:
+  void OnListeningStarted(NetworkErrorPtr err) {
+  }
+
+  void OnSocketBound(NetworkErrorPtr err, NetAddressPtr bound_address) {
+    if (err->code != 0) {
+      printf("Bound err = %d\n", err->code);
+      return;
+    }
+
+    printf("Got address = %d.%d.%d.%d:%d\n",
+           (int)bound_address->ipv4->addr[0],
+           (int)bound_address->ipv4->addr[1],
+           (int)bound_address->ipv4->addr[2],
+           (int)bound_address->ipv4->addr[3],
+           (int)bound_address->ipv4->port);
+
+    bound_socket_->StartListening(
+        GetProxy(&server_socket_),
+        base::Bind(&HttpServerApp::OnListeningStarted,
+                   base::Unretained(this)));
+  }
+
+  void Start() {
+    NetAddressPtr net_address(NetAddress::New());
+    net_address->family = NET_ADDRESS_FAMILY_IPV4;
+    net_address->ipv4 = NetAddressIPv4::New().Pass();

[yzshen1, 2014/10/07 20:14:34]

nit:Pass() is not needed.

+    net_address->ipv4->addr.resize(4);
+    net_address->ipv4->addr[0] = 0;
+    net_address->ipv4->addr[1] = 0;
+    net_address->ipv4->addr[2] = 0;
+    net_address->ipv4->addr[3] = 0;
+
+    network_service_->CreateTCPBoundSocket(
+        net_address.Pass(),
+        GetProxy(&bound_socket_),
+        base::Bind(&HttpServerApp::OnSocketBound, base::Unretained(this)));

[yzshen1, 2014/10/07 20:14:34]

nit: It seems you probably don't need to depend on base. You could use what is
provided in mojo/public/cpp/bindings/callback.h

(But I am not sure what will be the policy about using base functionality in
"standalone" mojo applications. Do you know?)

+  }
+
+  NetworkServicePtr network_service_;
+  TCPBoundSocketPtr bound_socket_;
+  TCPServerSocketPtr server_socket_;
+};
+
+}  // namespace examples
+}  // namespace mojo
+
+MojoResult MojoMain(MojoHandle shell_handle) {
+  mojo::ApplicationRunner runner(new mojo::examples::HttpServerApp);
+  return runner.Run(shell_handle);
+}