1// Copyright 2013 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4// 5// CRX filesystem is a filesystem that allows an extension to read its own 6// package directory tree. See ppapi/examples/crxfs for example. 7// 8// IMPLEMENTATION 9// 10// The implementation involves both browser and renderer. In order to provide 11// readonly access to CRX filesystem (i.e. extension directory), we create an 12// "isolated filesystem" pointing to current extension directory in browser. 13// Then browser grants read permission to renderer, and tells plugin the 14// filesystem id, or fsid. 15// 16// Once the plugin receives the fsid, it creates a PPB_FileSystem and forwards 17// the fsid to PepperFileSystemHost in order to construct root url. 18 19#ifndef PPAPI_PROXY_ISOLATED_FILE_SYSTEM_PRIVATE_RESOURCE_H_ 20#define PPAPI_PROXY_ISOLATED_FILE_SYSTEM_PRIVATE_RESOURCE_H_ 21 22#include <string> 23 24#include "base/memory/ref_counted.h" 25#include "ppapi/proxy/connection.h" 26#include "ppapi/proxy/plugin_resource.h" 27#include "ppapi/proxy/ppapi_proxy_export.h" 28#include "ppapi/thunk/ppb_isolated_file_system_private_api.h" 29 30namespace ppapi { 31 32class TrackedCallback; 33 34namespace proxy { 35 36class ResourceMessageReplyParams; 37 38class PPAPI_PROXY_EXPORT IsolatedFileSystemPrivateResource 39 : public PluginResource, 40 public thunk::PPB_IsolatedFileSystem_Private_API { 41 public: 42 IsolatedFileSystemPrivateResource( 43 Connection connection, PP_Instance instance); 44 virtual ~IsolatedFileSystemPrivateResource(); 45 46 // Resource overrides. 47 virtual thunk::PPB_IsolatedFileSystem_Private_API* 48 AsPPB_IsolatedFileSystem_Private_API() OVERRIDE; 49 50 // PPB_IsolatedFileSystem_Private_API implementation. 51 virtual int32_t Open(PP_Instance instance, 52 PP_IsolatedFileSystemType_Private type, 53 PP_Resource* file_system_resource, 54 scoped_refptr<TrackedCallback> callback) OVERRIDE; 55 56 private: 57 void OnBrowserOpenComplete(PP_IsolatedFileSystemType_Private type, 58 PP_Resource* file_system_resource, 59 scoped_refptr<TrackedCallback> callback, 60 const ResourceMessageReplyParams& params, 61 const std::string& fsid); 62 63 DISALLOW_COPY_AND_ASSIGN(IsolatedFileSystemPrivateResource); 64}; 65 66} // namespace proxy 67} // namespace ppapi 68 69#endif // PPAPI_PROXY_ISOLATED_FILE_SYSTEM_PRIVATE_RESOURCE_H_ 70