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// Copyright (c) 2012 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/browser/resolve_proxy_helper.h"
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "content/common/view_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/storage_partition.h"
#include "net/base/network_isolation_key.h"
#include "net/proxy_resolution/proxy_info.h"
#include "services/network/public/mojom/network_context.mojom.h"
namespace content {
ResolveProxyHelper::ResolveProxyHelper(int render_process_host_id)
: render_process_host_id_(render_process_host_id) {}
void ResolveProxyHelper::ResolveProxy(const GURL& url,
ResolveProxyCallback callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Enqueue the pending request.
pending_requests_.push_back(PendingRequest(url, std::move(callback)));
// If nothing is in progress, start.
if (!receiver_.is_bound()) {
DCHECK_EQ(1u, pending_requests_.size());
StartPendingRequest();
}
}
ResolveProxyHelper::~ResolveProxyHelper() {
DCHECK(!owned_self_);
DCHECK(!receiver_.is_bound());
}
void ResolveProxyHelper::StartPendingRequest() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(!receiver_.is_bound());
DCHECK(!pending_requests_.empty());
// Start the request.
mojo::PendingRemote<network::mojom::ProxyLookupClient> proxy_lookup_client =
receiver_.BindNewPipeAndPassRemote();
receiver_.set_disconnect_handler(
base::BindOnce(&ResolveProxyHelper::OnProxyLookupComplete,
base::Unretained(this), net::ERR_ABORTED, base::nullopt));
owned_self_ = this;
if (!SendRequestToNetworkService(pending_requests_.front().url,
std::move(proxy_lookup_client))) {
OnProxyLookupComplete(net::ERR_FAILED, base::nullopt);
}
}
bool ResolveProxyHelper::SendRequestToNetworkService(
const GURL& url,
mojo::PendingRemote<network::mojom::ProxyLookupClient>
proxy_lookup_client) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
RenderProcessHost* render_process_host =
RenderProcessHost::FromID(render_process_host_id_);
// Fail the request if there's no such RenderProcessHost;
if (!render_process_host)
return false;
// TODO(https://crbug.com/1021661): Pass in a non-empty NetworkIsolationKey.
render_process_host->GetStoragePartition()
->GetNetworkContext()
->LookUpProxyForURL(url, net::NetworkIsolationKey::Todo(),
std::move(proxy_lookup_client));
return true;
}
void ResolveProxyHelper::OnProxyLookupComplete(
int32_t net_error,
const base::Optional<net::ProxyInfo>& proxy_info) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(!pending_requests_.empty());
receiver_.reset();
// Need to keep |this| alive until the end of this method, and then release
// this reference. StartPendingRequest(), if called, will grab other
// reference, and a reference may be owned by the IO thread or by other
// posted tasks, so |this| may or may not be deleted at the end of this
// method.
scoped_refptr<ResolveProxyHelper> owned_self = std::move(owned_self_);
// If all references except |owned_self| have been released, then there's
// nothing waiting for pending requests to complete. So just exit this method,
// which will release the last reference, destroying |this|.
if (HasOneRef())
return;
// Clear the current (completed) request.
PendingRequest completed_req = std::move(pending_requests_.front());
pending_requests_.pop_front();
std::move(completed_req.callback)
.Run(proxy_info ? proxy_info->ToPacString()
: base::Optional<std::string>());
// Start the next request.
if (!pending_requests_.empty())
StartPendingRequest();
}
ResolveProxyHelper::PendingRequest::PendingRequest(
const GURL& url,
ResolveProxyCallback callback)
: url(url), callback(std::move(callback)) {}
ResolveProxyHelper::PendingRequest::PendingRequest(
PendingRequest&& pending_request) noexcept = default;
ResolveProxyHelper::PendingRequest::~PendingRequest() noexcept = default;
ResolveProxyHelper::PendingRequest&
ResolveProxyHelper::PendingRequest::operator=(
PendingRequest&& pending_request) noexcept = default;
} // namespace content
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