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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/renderer_host/pepper/pepper_proxy_lookup_helper.h"
#include "base/check_op.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/task/sequenced_task_runner.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "net/base/net_errors.h"
#include "url/gurl.h"
namespace content {
// Runs the proxy lookup on the UI thread. Created on the
// PepperProxyLookupHelper's thread, but then does all work on the UI thread,
// and is deleted there by a task posted by the PepperProxyLookupHelper.
class PepperProxyLookupHelper::UIThreadHelper
: public network::mojom::ProxyLookupClient {
public:
UIThreadHelper(const GURL& url,
LookUpProxyForURLCallback look_up_proxy_for_url_callback,
LookUpCompleteCallback look_up_complete_callback)
: look_up_complete_callback_(std::move(look_up_complete_callback)),
callback_task_runner_(base::SequencedTaskRunner::GetCurrentDefault()) {
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&UIThreadHelper::StartLookup, base::Unretained(this),
url, std::move(look_up_proxy_for_url_callback)));
}
UIThreadHelper(const UIThreadHelper&) = delete;
UIThreadHelper& operator=(const UIThreadHelper&) = delete;
~UIThreadHelper() override { DCHECK_CURRENTLY_ON(BrowserThread::UI); }
private:
void StartLookup(const GURL& url,
LookUpProxyForURLCallback look_up_proxy_for_url_callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
mojo::PendingRemote<network::mojom::ProxyLookupClient> proxy_lookup_client =
receiver_.BindNewPipeAndPassRemote();
receiver_.set_disconnect_handler(
base::BindOnce(&UIThreadHelper::OnProxyLookupComplete,
base::Unretained(this), net::ERR_ABORTED, std::nullopt));
if (!std::move(look_up_proxy_for_url_callback)
.Run(url, std::move(proxy_lookup_client))) {
OnProxyLookupComplete(net::ERR_FAILED, std::nullopt);
}
}
void OnProxyLookupComplete(
int32_t net_error,
const std::optional<net::ProxyInfo>& proxy_info) override {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
receiver_.reset();
callback_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(std::move(look_up_complete_callback_), proxy_info));
}
mojo::Receiver<network::mojom::ProxyLookupClient> receiver_{this};
LookUpCompleteCallback look_up_complete_callback_;
scoped_refptr<base::SequencedTaskRunner> callback_task_runner_;
};
PepperProxyLookupHelper::PepperProxyLookupHelper() {}
PepperProxyLookupHelper::~PepperProxyLookupHelper() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
GetUIThreadTaskRunner({})->DeleteSoon(FROM_HERE,
std::move(ui_thread_helper_));
}
void PepperProxyLookupHelper::Start(
const GURL& url,
LookUpProxyForURLCallback look_up_proxy_for_url_callback,
LookUpCompleteCallback look_up_complete_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!look_up_complete_callback_);
DCHECK(!ui_thread_helper_);
look_up_complete_callback_ = std::move(look_up_complete_callback);
ui_thread_helper_ = std::make_unique<UIThreadHelper>(
url, std::move(look_up_proxy_for_url_callback),
base::BindOnce(&PepperProxyLookupHelper::OnProxyLookupComplete,
weak_factory_.GetWeakPtr()));
}
void PepperProxyLookupHelper::OnProxyLookupComplete(
std::optional<net::ProxyInfo> proxy_info) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
std::move(look_up_complete_callback_).Run(std::move(proxy_info));
}
} // namespace content
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