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// Copyright (c) 2011 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 "content/renderer/websharedworker_proxy.h"
#include "content/child/child_thread.h"
#include "content/child/webmessageportchannel_impl.h"
#include "content/common/view_messages.h"
#include "content/common/worker_messages.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "third_party/WebKit/public/web/WebSharedWorkerClient.h"
namespace content {
WebSharedWorkerProxy::WebSharedWorkerProxy(ChildThread* child_thread,
unsigned long long document_id,
bool exists,
int route_id,
int render_view_route_id)
: route_id_(exists ? route_id : MSG_ROUTING_NONE),
render_view_route_id_(render_view_route_id),
child_thread_(child_thread),
document_id_(document_id),
pending_route_id_(route_id),
connect_listener_(NULL) {
if (route_id_ != MSG_ROUTING_NONE)
child_thread_->AddRoute(route_id_, this);
}
WebSharedWorkerProxy::~WebSharedWorkerProxy() {
Disconnect();
// Free up any unsent queued messages.
for (size_t i = 0; i < queued_messages_.size(); ++i)
delete queued_messages_[i];
}
void WebSharedWorkerProxy::Disconnect() {
if (route_id_ == MSG_ROUTING_NONE)
return;
// So the messages from WorkerContext (like WorkerContextDestroyed) do not
// come after nobody is listening. Since Worker and WorkerContext can
// terminate independently, already sent messages may still be in the pipe.
child_thread_->RemoveRoute(route_id_);
route_id_ = MSG_ROUTING_NONE;
}
void WebSharedWorkerProxy::CreateWorkerContext(
const GURL& script_url,
bool is_shared,
const string16& name,
const string16& user_agent,
const string16& source_code,
const string16& content_security_policy,
blink::WebContentSecurityPolicyType policy_type,
int pending_route_id,
int64 script_resource_appcache_id) {
DCHECK(route_id_ == MSG_ROUTING_NONE);
ViewHostMsg_CreateWorker_Params params;
params.url = script_url;
params.name = name;
params.document_id = document_id_;
params.render_view_route_id = render_view_route_id_;
params.route_id = pending_route_id;
params.script_resource_appcache_id = script_resource_appcache_id;
IPC::Message* create_message = new ViewHostMsg_CreateWorker(
params, &route_id_);
child_thread_->Send(create_message);
if (route_id_ == MSG_ROUTING_NONE)
return;
child_thread_->AddRoute(route_id_, this);
// We make sure that the start message is the first, since postMessage or
// connect might have already been called.
queued_messages_.insert(queued_messages_.begin(),
new WorkerMsg_StartWorkerContext(
route_id_, script_url, user_agent, source_code,
content_security_policy, policy_type));
}
bool WebSharedWorkerProxy::IsStarted() {
// Worker is started if we have a route ID and there are no queued messages
// (meaning we've sent the WorkerMsg_StartWorkerContext already).
return (route_id_ != MSG_ROUTING_NONE && queued_messages_.empty());
}
bool WebSharedWorkerProxy::Send(IPC::Message* message) {
// It's possible that messages will be sent before the worker is created, in
// which case route_id_ will be none. Or the worker object can be interacted
// with before the browser process told us that it started, in which case we
// also want to queue the message.
if (!IsStarted()) {
queued_messages_.push_back(message);
return true;
}
// For now we proxy all messages to the worker process through the browser.
// Revisit if we find this slow.
// TODO(jabdelmalek): handle sync messages if we need them.
IPC::Message* wrapped_msg = new ViewHostMsg_ForwardToWorker(*message);
delete message;
return child_thread_->Send(wrapped_msg);
}
void WebSharedWorkerProxy::SendQueuedMessages() {
DCHECK(queued_messages_.size());
std::vector<IPC::Message*> queued_messages = queued_messages_;
queued_messages_.clear();
for (size_t i = 0; i < queued_messages.size(); ++i) {
queued_messages[i]->set_routing_id(route_id_);
Send(queued_messages[i]);
}
}
bool WebSharedWorkerProxy::isStarted() {
return IsStarted();
}
void WebSharedWorkerProxy::startWorkerContext(
const blink::WebURL& script_url,
const blink::WebString& name,
const blink::WebString& user_agent,
const blink::WebString& source_code,
const blink::WebString& content_security_policy,
blink::WebContentSecurityPolicyType policy_type,
long long script_resource_appcache_id) {
DCHECK(!isStarted());
CreateWorkerContext(
script_url, true, name, user_agent, source_code, content_security_policy,
policy_type, pending_route_id_, script_resource_appcache_id);
}
void WebSharedWorkerProxy::terminateWorkerContext() {
// This API should only be invoked from worker context.
NOTREACHED();
}
void WebSharedWorkerProxy::clientDestroyed() {
// This API should only be invoked from worker context.
NOTREACHED();
}
void WebSharedWorkerProxy::connect(blink::WebMessagePortChannel* channel,
ConnectListener* listener) {
WebMessagePortChannelImpl* webchannel =
static_cast<WebMessagePortChannelImpl*>(channel);
int message_port_id = webchannel->message_port_id();
DCHECK(message_port_id != MSG_ROUTING_NONE);
webchannel->QueueMessages();
Send(new WorkerMsg_Connect(route_id_, message_port_id, MSG_ROUTING_NONE));
if (HasQueuedMessages()) {
connect_listener_ = listener;
} else {
listener->connected();
// The listener may free this object, so do not access the object after
// this point.
}
}
bool WebSharedWorkerProxy::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(WebSharedWorkerProxy, message)
IPC_MESSAGE_HANDLER(ViewMsg_WorkerCreated, OnWorkerCreated)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void WebSharedWorkerProxy::OnWorkerCreated() {
// The worker is created - now send off the CreateWorkerContext message and
// any other queued messages
SendQueuedMessages();
// Inform any listener that the pending connect event has been sent
// (this can result in this object being freed).
if (connect_listener_) {
connect_listener_->connected();
}
}
} // namespace content
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