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// 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_tcp_server/tcp_server_socket_event_dispatcher.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/extensions/api/socket/tcp_socket.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "extensions/browser/event_router.h"
#include "extensions/browser/extension_system.h"
#include "net/base/net_errors.h"
namespace extensions {
namespace api {
using content::BrowserThread;
static
base::LazyInstance<ProfileKeyedAPIFactory<TCPServerSocketEventDispatcher> >
g_factory = LAZY_INSTANCE_INITIALIZER;
// static
ProfileKeyedAPIFactory<TCPServerSocketEventDispatcher>*
TCPServerSocketEventDispatcher::GetFactoryInstance() {
return g_factory.Pointer();
}
// static
TCPServerSocketEventDispatcher* TCPServerSocketEventDispatcher::Get(
Profile* profile) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
return ProfileKeyedAPIFactory<TCPServerSocketEventDispatcher>::GetForProfile(
profile);
}
TCPServerSocketEventDispatcher::TCPServerSocketEventDispatcher(Profile* profile)
: thread_id_(Socket::kThreadId),
profile_(profile) {
ApiResourceManager<ResumableTCPServerSocket>* server_manager =
ApiResourceManager<ResumableTCPServerSocket>::Get(profile);
DCHECK(server_manager) << "There is no server socket manager. "
"If this assertion is failing during a test, then it is likely that "
"TestExtensionSystem is failing to provide an instance of "
"ApiResourceManager<ResumableTCPServerSocket>.";
server_sockets_ = server_manager->data_;
ApiResourceManager<ResumableTCPSocket>* client_manager =
ApiResourceManager<ResumableTCPSocket>::Get(profile);
DCHECK(client_manager) << "There is no client socket manager. "
"If this assertion is failing during a test, then it is likely that "
"TestExtensionSystem is failing to provide an instance of "
"ApiResourceManager<ResumableTCPSocket>.";
client_sockets_ = client_manager->data_;
}
TCPServerSocketEventDispatcher::~TCPServerSocketEventDispatcher() {}
TCPServerSocketEventDispatcher::AcceptParams::AcceptParams() {}
TCPServerSocketEventDispatcher::AcceptParams::~AcceptParams() {}
void TCPServerSocketEventDispatcher::OnServerSocketListen(
const std::string& extension_id,
int socket_id) {
DCHECK(BrowserThread::CurrentlyOn(thread_id_));
StartSocketAccept(extension_id, socket_id);
}
void TCPServerSocketEventDispatcher::OnServerSocketResume(
const std::string& extension_id,
int socket_id) {
DCHECK(BrowserThread::CurrentlyOn(thread_id_));
StartSocketAccept(extension_id, socket_id);
}
void TCPServerSocketEventDispatcher::StartSocketAccept(
const std::string& extension_id,
int socket_id) {
DCHECK(BrowserThread::CurrentlyOn(thread_id_));
AcceptParams params;
params.thread_id = thread_id_;
params.profile_id = profile_;
params.extension_id = extension_id;
params.server_sockets = server_sockets_;
params.client_sockets = client_sockets_;
params.socket_id = socket_id;
StartAccept(params);
}
// static
void TCPServerSocketEventDispatcher::StartAccept(const AcceptParams& params) {
DCHECK(BrowserThread::CurrentlyOn(params.thread_id));
ResumableTCPServerSocket* socket =
params.server_sockets->Get(params.extension_id, params.socket_id);
if (!socket) {
// 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 accept if the socket has been paused.
if (socket->paused())
return;
socket->Accept(base::Bind(&TCPServerSocketEventDispatcher::AcceptCallback,
params));
}
// static
void TCPServerSocketEventDispatcher::AcceptCallback(
const AcceptParams& params,
int result_code,
net::TCPClientSocket *socket) {
DCHECK(BrowserThread::CurrentlyOn(params.thread_id));
if (result_code >= 0) {
ResumableTCPSocket *client_socket =
new ResumableTCPSocket(socket, params.extension_id, true);
client_socket->set_paused(true);
int client_socket_id = params.client_sockets->Add(client_socket);
// Dispatch "onAccept" event.
sockets_tcp_server::AcceptInfo accept_info;
accept_info.socket_id = params.socket_id;
accept_info.client_socket_id = client_socket_id;
scoped_ptr<base::ListValue> args =
sockets_tcp_server::OnAccept::Create(accept_info);
scoped_ptr<Event> event(
new Event(sockets_tcp_server::OnAccept::kEventName, args.Pass()));
PostEvent(params, event.Pass());
// Post a task to delay the "accept" until the socket is available, as
// calling StartAccept at this point would error with ERR_IO_PENDING.
BrowserThread::PostTask(
params.thread_id, FROM_HERE,
base::Bind(&TCPServerSocketEventDispatcher::StartAccept, params));
} else {
// Dispatch "onAcceptError" event but don't start another accept to avoid
// potential infinite "accepts" if we have a persistent network error.
sockets_tcp_server::AcceptErrorInfo accept_error_info;
accept_error_info.socket_id = params.socket_id;
accept_error_info.result_code = result_code;
scoped_ptr<base::ListValue> args =
sockets_tcp_server::OnAcceptError::Create(accept_error_info);
scoped_ptr<Event> event(
new Event(sockets_tcp_server::OnAcceptError::kEventName, args.Pass()));
PostEvent(params, event.Pass());
// Since we got an error, the socket is now "paused" until the application
// "resumes" it.
ResumableTCPServerSocket* socket =
params.server_sockets->Get(params.extension_id, params.socket_id);
if (socket) {
socket->set_paused(true);
}
}
}
// static
void TCPServerSocketEventDispatcher::PostEvent(const AcceptParams& params,
scoped_ptr<Event> event) {
DCHECK(BrowserThread::CurrentlyOn(params.thread_id));
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&DispatchEvent,
params.profile_id,
params.extension_id,
base::Passed(event.Pass())));
}
// static
void TCPServerSocketEventDispatcher::DispatchEvent(
void* profile_id,
const std::string& extension_id,
scoped_ptr<Event> event) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
Profile* profile = reinterpret_cast<Profile*>(profile_id);
if (!g_browser_process->profile_manager()->IsValidProfile(profile))
return;
EventRouter* router = ExtensionSystem::Get(profile)->event_router();
if (router)
router->DispatchEventToExtension(extension_id, event.Pass());
}
} // namespace api
} // namespace extensions
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