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// 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 "mojo/shell/dynamic_service_loader.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/file_util.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop.h"
#include "mojo/common/data_pipe_utils.h"
#include "mojo/services/public/interfaces/network/url_loader.mojom.h"
#include "mojo/shell/context.h"
#include "mojo/shell/keep_alive.h"
#include "mojo/shell/switches.h"
#include "net/base/filename_util.h"
namespace mojo {
namespace shell {
namespace {
class Loader {
public:
explicit Loader(scoped_ptr<DynamicServiceRunner> runner)
: runner_(runner.Pass()) {
}
virtual void Start(const GURL& url,
ScopedMessagePipeHandle service_handle,
Context* context) = 0;
void StartService(const base::FilePath& path,
ScopedMessagePipeHandle service_handle,
bool path_is_valid) {
if (path_is_valid) {
runner_->Start(path, service_handle.Pass(),
base::Bind(&Loader::AppCompleted, base::Unretained(this)));
} else {
AppCompleted();
}
}
protected:
virtual ~Loader() {}
private:
void AppCompleted() {
delete this;
}
scoped_ptr<DynamicServiceRunner> runner_;
};
// For loading services via file:// URLs.
class LocalLoader : public Loader {
public:
explicit LocalLoader(scoped_ptr<DynamicServiceRunner> runner)
: Loader(runner.Pass()) {
}
virtual void Start(const GURL& url,
ScopedMessagePipeHandle service_handle,
Context* context) OVERRIDE {
base::FilePath path;
net::FileURLToFilePath(url, &path);
// TODO(darin): Check if the given file path exists.
// Complete asynchronously for consistency with NetworkServiceLoader.
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&Loader::StartService,
base::Unretained(this),
path,
base::Passed(&service_handle),
true));
}
};
// For loading services via the network stack.
class NetworkLoader : public Loader, public URLLoaderClient {
public:
explicit NetworkLoader(scoped_ptr<DynamicServiceRunner> runner,
NetworkService* network_service)
: Loader(runner.Pass()) {
network_service->CreateURLLoader(Get(&url_loader_));
url_loader_.set_client(this);
}
virtual void Start(const GURL& url,
ScopedMessagePipeHandle service_handle,
Context* context) OVERRIDE {
service_handle_ = service_handle.Pass();
URLRequestPtr request(URLRequest::New());
request->url = url.spec();
request->auto_follow_redirects = true;
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableCache)) {
request->bypass_cache = true;
}
DataPipe data_pipe;
url_loader_->Start(request.Pass(), data_pipe.producer_handle.Pass());
base::CreateTemporaryFile(&file_);
common::CopyToFile(data_pipe.consumer_handle.Pass(),
file_,
context->task_runners()->blocking_pool(),
base::Bind(&Loader::StartService,
base::Unretained(this),
file_,
base::Passed(&service_handle_)));
}
private:
virtual ~NetworkLoader() {
if (!file_.empty())
base::DeleteFile(file_, false);
}
// URLLoaderClient methods:
virtual void OnReceivedRedirect(URLResponsePtr response,
const String& new_url,
const String& new_method) OVERRIDE {
// TODO(darin): Handle redirects properly!
}
virtual void OnReceivedResponse(URLResponsePtr response) OVERRIDE {}
virtual void OnReceivedError(NetworkErrorPtr error) OVERRIDE {}
virtual void OnReceivedEndOfResponseBody() OVERRIDE {}
NetworkServicePtr network_service_;
URLLoaderPtr url_loader_;
ScopedMessagePipeHandle service_handle_;
base::FilePath file_;
};
} // namespace
DynamicServiceLoader::DynamicServiceLoader(
Context* context,
scoped_ptr<DynamicServiceRunnerFactory> runner_factory)
: context_(context),
runner_factory_(runner_factory.Pass()) {
}
DynamicServiceLoader::~DynamicServiceLoader() {
}
void DynamicServiceLoader::LoadService(ServiceManager* manager,
const GURL& url,
ScopedMessagePipeHandle service_handle) {
scoped_ptr<DynamicServiceRunner> runner = runner_factory_->Create(context_);
GURL resolved_url;
if (url.SchemeIs("mojo")) {
resolved_url = context_->mojo_url_resolver()->Resolve(url);
} else {
resolved_url = url;
}
Loader* loader;
if (resolved_url.SchemeIsFile()) {
loader = new LocalLoader(runner.Pass());
} else {
if (!network_service_.get()) {
context_->service_manager()->ConnectTo(GURL("mojo:mojo_network_service"),
&network_service_,
GURL());
}
loader = new NetworkLoader(runner.Pass(), network_service_.get());
}
loader->Start(resolved_url, service_handle.Pass(), context_);
}
void DynamicServiceLoader::OnServiceError(ServiceManager* manager,
const GURL& url) {
// TODO(darin): What should we do about service errors? This implies that
// the app closed its handle to the service manager. Maybe we don't care?
}
} // namespace shell
} // namespace mojo
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