Move sockets APIs out of src/chrome

chrome/browser/extensions/api/sockets_udp/udp_socket_event_dispatcher.cc

-// Copyright 2013 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 "chrome/browser/extensions/api/sockets_udp/udp_socket_event_dispatcher.h"
-
-#include "chrome/browser/extensions/api/socket/udp_socket.h"
-#include "extensions/browser/event_router.h"
-#include "extensions/browser/extension_system.h"
-#include "extensions/browser/extensions_browser_client.h"
-#include "net/base/net_errors.h"
-
-namespace extensions {
-namespace api {
-
-using content::BrowserThread;
-
-static base::LazyInstance<
-    BrowserContextKeyedAPIFactory<UDPSocketEventDispatcher> > g_factory =
-    LAZY_INSTANCE_INITIALIZER;
-
-// static
-BrowserContextKeyedAPIFactory<UDPSocketEventDispatcher>*
-UDPSocketEventDispatcher::GetFactoryInstance() {
-  return g_factory.Pointer();
-}
-
-// static
-UDPSocketEventDispatcher* UDPSocketEventDispatcher::Get(
-    content::BrowserContext* context) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  return BrowserContextKeyedAPIFactory<UDPSocketEventDispatcher>::Get(context);
-}
-
-UDPSocketEventDispatcher::UDPSocketEventDispatcher(
-    content::BrowserContext* context)
-    : thread_id_(Socket::kThreadId), browser_context_(context) {
-  ApiResourceManager<ResumableUDPSocket>* manager =
-      ApiResourceManager<ResumableUDPSocket>::Get(browser_context_);
-  DCHECK(manager) << "There is no socket manager. "
-    "If this assertion is failing during a test, then it is likely that "
-    "TestExtensionSystem is failing to provide an instance of "
-    "ApiResourceManager<ResumableUDPSocket>.";
-  sockets_ = manager->data_;
-}
-
-UDPSocketEventDispatcher::~UDPSocketEventDispatcher() {}
-
-UDPSocketEventDispatcher::ReceiveParams::ReceiveParams() {}
-
-UDPSocketEventDispatcher::ReceiveParams::~ReceiveParams() {}
-
-void UDPSocketEventDispatcher::OnSocketBind(const std::string& extension_id,
-                                            int socket_id) {
-  OnSocketResume(extension_id, socket_id);
-}
-
-void UDPSocketEventDispatcher::OnSocketResume(const std::string& extension_id,
-                                              int socket_id) {
-  DCHECK(BrowserThread::CurrentlyOn(thread_id_));
-
-  ReceiveParams params;
-  params.thread_id = thread_id_;
-  params.browser_context_id = browser_context_;
-  params.extension_id = extension_id;
-  params.sockets = sockets_;
-  params.socket_id = socket_id;
-
-  StartReceive(params);
-}
-
-/* static */
-void UDPSocketEventDispatcher::StartReceive(const ReceiveParams& params) {
-  DCHECK(BrowserThread::CurrentlyOn(params.thread_id));
-
-  ResumableUDPSocket* socket =
-      params.sockets->Get(params.extension_id, params.socket_id);
-  if (socket == NULL) {
-    // This can happen if the socket is closed while our callback is active.
-    return;
-  }
-  DCHECK(params.extension_id == socket->owner_extension_id())
-    << "Socket has wrong owner.";
-
-  // Don't start another read if the socket has been paused.
-  if (socket->paused())
-    return;
-
-  int buffer_size = (socket->buffer_size() <= 0 ? 4096 : socket->buffer_size());
-  socket->RecvFrom(buffer_size,
-                   base::Bind(&UDPSocketEventDispatcher::ReceiveCallback,
-                   params));
-}
-
-/* static */
-void UDPSocketEventDispatcher::ReceiveCallback(
-    const ReceiveParams& params,
-    int bytes_read,
-    scoped_refptr<net::IOBuffer> io_buffer,
-    const std::string& address,
-    int port) {
-  DCHECK(BrowserThread::CurrentlyOn(params.thread_id));
-
-  // If |bytes_read| == 0, the message contained no data.
-  // If |bytes_read| < 0, there was a network error, and |bytes_read| is a value
-  // from "net::ERR_".
-
-  if (bytes_read >= 0) {
-    // Dispatch "onReceive" event.
-    sockets_udp::ReceiveInfo receive_info;
-    receive_info.socket_id = params.socket_id;
-    receive_info.data = std::string(io_buffer->data(), bytes_read);
-    receive_info.remote_address = address;
-    receive_info.remote_port = port;
-    scoped_ptr<base::ListValue> args =
-        sockets_udp::OnReceive::Create(receive_info);
-    scoped_ptr<Event> event(
-      new Event(sockets_udp::OnReceive::kEventName, args.Pass()));
-    PostEvent(params, event.Pass());
-
-    // Post a task to delay the read until the socket is available, as
-    // calling StartReceive at this point would error with ERR_IO_PENDING.
-    BrowserThread::PostTask(
-        params.thread_id, FROM_HERE,
-        base::Bind(&UDPSocketEventDispatcher::StartReceive, params));
-  } else if (bytes_read == net::ERR_IO_PENDING) {
-    // This happens when resuming a socket which already had an
-    // active "recv" callback.
-  } else {
-    // Dispatch "onReceiveError" event but don't start another read to avoid
-    // potential infinite reads if we have a persistent network error.
-    sockets_udp::ReceiveErrorInfo receive_error_info;
-    receive_error_info.socket_id = params.socket_id;
-    receive_error_info.result_code = bytes_read;
-    scoped_ptr<base::ListValue> args =
-        sockets_udp::OnReceiveError::Create(receive_error_info);
-    scoped_ptr<Event> event(
-      new Event(sockets_udp::OnReceiveError::kEventName, args.Pass()));
-    PostEvent(params, event.Pass());
-
-    // Since we got an error, the socket is now "paused" until the application
-    // "resumes" it.
-    ResumableUDPSocket* socket =
-        params.sockets->Get(params.extension_id, params.socket_id);
-    if (socket) {
-      socket->set_paused(true);
-    }
-  }
-}
-
-/* static */
-void UDPSocketEventDispatcher::PostEvent(const ReceiveParams& params,
-                                         scoped_ptr<Event> event) {
-  DCHECK(BrowserThread::CurrentlyOn(params.thread_id));
-
-  BrowserThread::PostTask(BrowserThread::UI,
-                          FROM_HERE,
-                          base::Bind(&DispatchEvent,
-                                     params.browser_context_id,
-                                     params.extension_id,
-                                     base::Passed(event.Pass())));
-}
-
-/*static*/
-void UDPSocketEventDispatcher::DispatchEvent(void* browser_context_id,
-                                             const std::string& extension_id,
-                                             scoped_ptr<Event> event) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  content::BrowserContext* context =
-      reinterpret_cast<content::BrowserContext*>(browser_context_id);
-  if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(context))
-    return;
-  EventRouter* router = ExtensionSystem::Get(context)->event_router();
-  if (router)
-    router->DispatchEventToExtension(extension_id, event.Pass());
-}
-
-}  // namespace api
-}  // namespace extensions