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// Copyright (c) 2010 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.
//
// Extension port manager takes care of managing the state of
// connecting and connected ports.
#include "ceee/ie/plugin/bho/extension_port_manager.h"
#include "base/logging.h"
#include "base/scoped_ptr.h"
#include "base/utf_string_conversions.h"
#include "base/values.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/win/scoped_bstr.h"
#include "ceee/ie/common/chrome_frame_host.h"
#include "ceee/ie/plugin/scripting/content_script_native_api.h"
#include "chrome/browser/automation/extension_automation_constants.h"
namespace ext = extension_automation_constants;
ExtensionPortManager::ExtensionPortManager() : next_connection_id_(0) {
}
ExtensionPortManager::~ExtensionPortManager() {
}
void ExtensionPortManager::Initialize(IChromeFrameHost* chrome_frame_host) {
chrome_frame_host_ = chrome_frame_host;
}
void ExtensionPortManager::CloseAll(IContentScriptNativeApi* instance) {
DCHECK(instance != NULL);
// TODO(siggi@chromium.org): Deal better with these cases. Connected
// ports probably ought to be closed, and connecting ports may
// need to hang around until we get the connected message, to be
// terminated at that point.
ConnectedPortMap::iterator it(connected_ports_.begin());
while (it != connected_ports_.end()) {
if (it->second.instance = instance) {
connected_ports_.erase(it++);
} else {
++it;
}
}
ConnectingPortMap::iterator jt(connecting_ports_.begin());
while (jt != connecting_ports_.end()) {
if (jt->second.instance = instance) {
connecting_ports_.erase(jt++);
} else {
++jt;
}
}
}
HRESULT ExtensionPortManager::OpenChannelToExtension(
IContentScriptNativeApi* instance, const std::string& extension,
const std::string& channel_name, Value* tab, int cookie) {
int connection_id = next_connection_id_++;
// Prepare the connection request.
scoped_ptr<DictionaryValue> dict(new DictionaryValue());
if (dict.get() == NULL)
return E_OUTOFMEMORY;
dict->SetInteger(ext::kAutomationRequestIdKey, ext::OPEN_CHANNEL);
dict->SetInteger(ext::kAutomationConnectionIdKey, connection_id);
dict->SetString(ext::kAutomationExtensionIdKey, extension);
dict->SetString(ext::kAutomationChannelNameKey, channel_name);
dict->Set(ext::kAutomationTabJsonKey, tab);
// JSON encode it.
std::string request_json;
base::JSONWriter::Write(dict.get(), false, &request_json);
// And fire it off.
HRESULT hr = PostMessageToHost(request_json,
ext::kAutomationPortRequestTarget);
if (FAILED(hr))
return hr;
ConnectingPort connecting_port = { instance, cookie };
connecting_ports_[connection_id] = connecting_port;
return S_OK;
}
HRESULT ExtensionPortManager::PostMessage(int port_id,
const std::string& message) {
// Wrap the message for sending as a port request.
scoped_ptr<DictionaryValue> dict(new DictionaryValue());
if (dict.get() == NULL)
return E_OUTOFMEMORY;
dict->SetInteger(ext::kAutomationRequestIdKey, ext::POST_MESSAGE);
dict->SetInteger(ext::kAutomationPortIdKey, port_id);
dict->SetString(ext::kAutomationMessageDataKey, message);
// JSON encode it.
std::string message_json;
base::JSONWriter::Write(dict.get(), false, &message_json);
// And fire it off.
return PostMessageToHost(message_json,
std::string(ext::kAutomationPortRequestTarget));
}
void ExtensionPortManager::OnPortMessage(BSTR message) {
std::string message_json = CW2A(message);
scoped_ptr<Value> value(base::JSONReader::Read(message_json, true));
if (!value.get() || !value->IsType(Value::TYPE_DICTIONARY)) {
NOTREACHED();
LOG(ERROR) << "Invalid message";
return;
}
DictionaryValue* dict = static_cast<DictionaryValue*>(value.get());
int request = -1;
if (!dict->GetInteger(ext::kAutomationRequestIdKey, &request)) {
NOTREACHED();
LOG(ERROR) << "Request ID missing";
return;
}
if (request == ext::CHANNEL_OPENED) {
int connection_id = -1;
if (!dict->GetInteger(ext::kAutomationConnectionIdKey, &connection_id)) {
NOTREACHED();
LOG(ERROR) << "Connection ID missing";
return;
}
int port_id = -1;
if (!dict->GetInteger(ext::kAutomationPortIdKey, &port_id)) {
NOTREACHED();
LOG(ERROR) << "Port ID missing";
return;
}
ConnectingPortMap::iterator it(connecting_ports_.find(connection_id));
if (it == connecting_ports_.end()) {
// TODO(siggi@chromium.org): This can happen legitimately on a
// race between connect and document unload. We should
// probably respond with a close port message here.
LOG(ERROR) << "No such connection id " << connection_id;
return;
}
ConnectingPort port = it->second;
connecting_ports_.erase(it);
// Did it connect successfully?
if (port_id != -1)
connected_ports_[port_id].instance = port.instance;
port.instance->OnChannelOpened(port.cookie, port_id);
return;
} else if (request == ext::POST_MESSAGE) {
int port_id = -1;
if (!dict->GetInteger(ext::kAutomationPortIdKey, &port_id)) {
NOTREACHED();
LOG(ERROR) << "No port id";
return;
}
std::string data;
if (!dict->GetString(ext::kAutomationMessageDataKey, &data)) {
NOTREACHED();
LOG(ERROR) << "No message data";
return;
}
ConnectedPortMap::iterator it(connected_ports_.find(port_id));
if (it == connected_ports_.end()) {
LOG(ERROR) << "No such port " << port_id;
return;
}
it->second.instance->OnPostMessage(port_id, data);
return;
} else if (request == ext::CHANNEL_CLOSED) {
// TODO(siggi@chromium.org): handle correctly.
return;
}
NOTREACHED();
}
HRESULT ExtensionPortManager::PostMessageToHost(const std::string& message,
const std::string& target) {
// Post our message through the ChromeFrameHost. We allow queueing,
// because we don't synchronize to the destination extension loading.
return chrome_frame_host_->PostMessage(
base::win::ScopedBstr(ASCIIToWide(message).c_str()),
base::win::ScopedBstr(ASCIIToWide(target).c_str()));
}
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