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// Copyright 2013 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.
#ifndef CHROME_RENDERER_EXTENSIONS_EXTENSION_LOCALIZATION_PEER_H_
#define CHROME_RENDERER_EXTENSIONS_EXTENSION_LOCALIZATION_PEER_H_
#include <stdint.h>
#include <memory>
#include <string>
#include "base/macros.h"
#include "content/public/renderer/request_peer.h"
#include "services/network/public/cpp/resource_response_info.h"
namespace IPC {
class Sender;
}
// The ExtensionLocalizationPeer is a proxy to a
// content::RequestPeer instance. It is used to pre-process
// CSS files requested by extensions to replace localization templates with the
// appropriate localized strings.
//
// Call the factory method CreateExtensionLocalizationPeer() to obtain an
// instance of ExtensionLocalizationPeer based on the original Peer.
class ExtensionLocalizationPeer : public content::RequestPeer {
public:
~ExtensionLocalizationPeer() override;
static std::unique_ptr<content::RequestPeer> CreateExtensionLocalizationPeer(
std::unique_ptr<content::RequestPeer> peer,
IPC::Sender* message_sender,
const std::string& mime_type,
const GURL& request_url);
// content::RequestPeer methods.
void OnUploadProgress(uint64_t position, uint64_t size) override;
bool OnReceivedRedirect(const net::RedirectInfo& redirect_info,
const network::ResourceResponseInfo& info) override;
void OnReceivedResponse(const network::ResourceResponseInfo& info) override;
void OnStartLoadingResponseBody(
mojo::ScopedDataPipeConsumerHandle body) override;
void OnReceivedData(std::unique_ptr<ReceivedData> data) override;
void OnTransferSizeUpdated(int transfer_size_diff) override;
void OnCompletedRequest(
const network::URLLoaderCompletionStatus& status) override;
private:
friend class ExtensionLocalizationPeerTest;
// Use CreateExtensionLocalizationPeer to create an instance.
ExtensionLocalizationPeer(std::unique_ptr<content::RequestPeer> peer,
IPC::Sender* message_sender,
const GURL& request_url);
// Loads message catalogs, and replaces all __MSG_some_name__ templates within
// loaded file.
void ReplaceMessages();
// Original peer that handles the request once we are done processing data_.
std::unique_ptr<content::RequestPeer> original_peer_;
// We just pass though the response info. This holds the copy of the original.
network::ResourceResponseInfo response_info_;
// Sends ExtensionHostMsg_GetMessageBundle message to the browser to fetch
// message catalog.
IPC::Sender* message_sender_;
// Buffer for incoming data. We wait until OnCompletedRequest before using it.
std::string data_;
// Original request URL.
GURL request_url_;
private:
DISALLOW_COPY_AND_ASSIGN(ExtensionLocalizationPeer);
};
#endif // CHROME_RENDERER_EXTENSIONS_EXTENSION_LOCALIZATION_PEER_H_