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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/common_type_converters.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 {
void RunLibraryComplete(DynamicServiceRunner* runner,
const base::FilePath& temp_file) {
delete runner;
if (!temp_file.empty())
base::DeleteFile(temp_file, false);
}
} // namespace
DynamicServiceLoader::DynamicServiceLoader(
Context* context,
scoped_ptr<DynamicServiceRunnerFactory> runner_factory)
: context_(context),
runner_factory_(runner_factory.Pass()),
weak_ptr_factory_(this) {
}
DynamicServiceLoader::~DynamicServiceLoader() {
}
void DynamicServiceLoader::RegisterContentHandler(
const std::string& mime_type,
const GURL& content_handler_url) {
mime_type_to_url_[mime_type] = content_handler_url;
}
void DynamicServiceLoader::Load(ServiceManager* manager,
const GURL& url,
scoped_refptr<LoadCallbacks> callbacks) {
GURL resolved_url;
if (url.SchemeIs("mojo")) {
resolved_url = context_->mojo_url_resolver()->Resolve(url);
} else {
resolved_url = url;
}
if (resolved_url.SchemeIsFile())
LoadLocalService(resolved_url, callbacks);
else
LoadNetworkService(resolved_url, callbacks);
}
void DynamicServiceLoader::LoadLocalService(
const GURL& resolved_url,
scoped_refptr<LoadCallbacks> callbacks) {
base::FilePath path;
net::FileURLToFilePath(resolved_url, &path);
const bool kDeleteFileAfter = false;
// Async for consistency with network case.
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&DynamicServiceLoader::RunLibrary,
weak_ptr_factory_.GetWeakPtr(),
path,
callbacks,
kDeleteFileAfter,
base::PathExists(path)));
}
void DynamicServiceLoader::LoadNetworkService(
const GURL& resolved_url,
scoped_refptr<LoadCallbacks> callbacks) {
if (!network_service_) {
context_->service_manager()->ConnectToService(
GURL("mojo:mojo_network_service"),
&network_service_);
}
if (!url_loader_)
network_service_->CreateURLLoader(Get(&url_loader_));
URLRequestPtr request(URLRequest::New());
request->url = String::From(resolved_url);
request->auto_follow_redirects = true;
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableCache)) {
request->bypass_cache = true;
}
url_loader_->Start(
request.Pass(),
base::Bind(&DynamicServiceLoader::OnLoadNetworkServiceComplete,
weak_ptr_factory_.GetWeakPtr(),
callbacks));
}
void DynamicServiceLoader::OnLoadNetworkServiceComplete(
scoped_refptr<LoadCallbacks> callbacks, URLResponsePtr response) {
if (response->error) {
LOG(ERROR) << "Error (" << response->error->code << ": "
<< response->error->description << ") while fetching "
<< response->url;
}
MimeTypeToURLMap::iterator iter =
mime_type_to_url_.find(response->mime_type);
if (iter != mime_type_to_url_.end()) {
callbacks->LoadWithContentHandler(iter->second, response.Pass());
return;
}
base::FilePath file;
base::CreateTemporaryFile(&file);
const bool kDeleteFileAfter = true;
common::CopyToFile(response->body.Pass(),
file,
context_->task_runners()->blocking_pool(),
base::Bind(&DynamicServiceLoader::RunLibrary,
weak_ptr_factory_.GetWeakPtr(),
file,
callbacks,
kDeleteFileAfter));
}
void DynamicServiceLoader::RunLibrary(const base::FilePath& path,
scoped_refptr<LoadCallbacks> callbacks,
bool delete_file_after,
bool path_exists) {
// TODO(aa): We need to create a runner, even if we're not going to use it,
// because it getting destroyed is what causes shell to shut down. If we don't
// create this, in the case where shell never successfully creates even one
// app, then shell will never shut down, because no runners are ever
// destroyed.
scoped_ptr<DynamicServiceRunner> runner(runner_factory_->Create(context_));
if (!path_exists)
return;
ScopedMessagePipeHandle shell_handle = callbacks->RegisterApplication();
if (!shell_handle.is_valid())
return;
DynamicServiceRunner* runner_raw = runner.release();
runner_raw->Start(path,
shell_handle.Pass(),
base::Bind(&RunLibraryComplete,
base::Unretained(runner_raw),
delete_file_after ? path : base::FilePath()));
}
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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