1b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// Copyright (c) 2013 The Chromium Authors. All rights reserved. 2b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// found in the LICENSE file. 4b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 5b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include <sstream> 6b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 7b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include "ppapi/c/ppb_file_io.h" 8b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include "ppapi/cpp/file_io.h" 9b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include "ppapi/cpp/file_ref.h" 10b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include "ppapi/cpp/instance.h" 11b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include "ppapi/cpp/module.h" 12b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include "ppapi/cpp/private/ext_crx_file_system_private.h" 13b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#include "ppapi/utility/completion_callback_factory.h" 14b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 15b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// When compiling natively on Windows, PostMessage can be #define-d to 16b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// something else. 17b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#ifdef PostMessage 18b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#undef PostMessage 19b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)#endif 20b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 21b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// Buffer size for reading file. 22b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)const size_t kBufSize = 1024; 23b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 24b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)class MyInstance : public pp::Instance { 25b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) public: 26b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) explicit MyInstance(PP_Instance instance) 27b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) : pp::Instance(instance), 28b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) handle_(instance) { 29b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) factory_.Initialize(this); 30b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 31b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) virtual ~MyInstance() { 32b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 33b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 34b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) // Handler for the page sending us messages. 35b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) virtual void HandleMessage(const pp::Var& message_data); 36b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 37b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) private: 38b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) void OpenCrxFsAndReadFile(const std::string& filename); 39b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 40b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) void CrxFileSystemCallback(int32_t pp_error, pp::FileSystem file_system); 41b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) void FileIOOpenCallback(int32_t pp_error); 42b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) void FileIOReadCallback(int32_t pp_error); 43b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 44b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) // Forwards the given string to the page. 45b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) void ReportResponse(const char* name, int32_t pp_error); 46b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 47b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) // Generates completion callbacks scoped to this class. 48b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) pp::CompletionCallbackFactory<MyInstance> factory_; 49b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 50b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) pp::InstanceHandle handle_; 51b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) pp::ExtCrxFileSystemPrivate crxfs_; 52b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) pp::FileRef file_ref_; 53b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) pp::FileIO file_io_; 54b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) std::string filename_; 55b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) char read_buf_[kBufSize]; 56b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)}; 57b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 58b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)void MyInstance::HandleMessage(const pp::Var& message_data) { 59b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) if (!message_data.is_string()) { 60b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) ReportResponse("HandleMessage: not a string", 0); 61b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) return; 62b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 63b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) std::string filename = message_data.AsString(); 64b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) OpenCrxFsAndReadFile(filename); 65b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)} 66b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 67b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)void MyInstance::OpenCrxFsAndReadFile(const std::string& filename) { 68b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) filename_ = filename; 69b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 70b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) pp::CompletionCallbackWithOutput<pp::FileSystem> callback = 71b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) factory_.NewCallbackWithOutput(&MyInstance::CrxFileSystemCallback); 72b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 73b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) crxfs_ = pp::ExtCrxFileSystemPrivate(this); 74b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) int32_t rv = crxfs_.Open(callback); 75b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) if (rv != PP_OK_COMPLETIONPENDING) 76b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) ReportResponse("ExtCrxFileSystemPrivate::Open", rv); 77b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)} 78b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 79b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)void MyInstance::CrxFileSystemCallback(int32_t pp_error, 80b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) pp::FileSystem file_system) { 81b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) if (pp_error != PP_OK) { 82b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) ReportResponse("CrxFileSystemCallback", pp_error); 83b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) return; 84b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 85b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 86b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) file_io_ = pp::FileIO(handle_); 87b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) file_ref_ = pp::FileRef(file_system, filename_.c_str()); 88b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) int32_t rv = file_io_.Open( 89b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) file_ref_, PP_FILEOPENFLAG_READ, 90b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) factory_.NewCallback(&MyInstance::FileIOOpenCallback)); 91b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) if (rv != PP_OK_COMPLETIONPENDING) 92b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) ReportResponse("FileIO::Open", rv); 93b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)} 94b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 95b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)void MyInstance::FileIOOpenCallback(int32_t pp_error) { 96b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) if (pp_error != PP_OK) { 97b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) ReportResponse("FileIOOpenCallback", pp_error); 98b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) return; 99b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 100b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 101b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) int32_t rv = file_io_.Read(0, read_buf_, sizeof(read_buf_), 102b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) factory_.NewCallback(&MyInstance::FileIOReadCallback)); 103b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) if (rv != PP_OK_COMPLETIONPENDING) { 104b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) ReportResponse("FileIO::Read", rv); 105b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) return; 106b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 107b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)} 108b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 109b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)void MyInstance::FileIOReadCallback(int32_t pp_error) { 110b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) if (pp_error < 0) { 111b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) ReportResponse("FileIOReadCallback", pp_error); 112b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) return; 113b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 114b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 115b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) std::string content; 116b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) content.append(read_buf_, pp_error); 117b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) PostMessage(pp::Var(content)); 118b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)} 119b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 120b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)void MyInstance::ReportResponse(const char* name, int32_t rv) { 121b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) std::ostringstream out; 122b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) out << name << " failed, pp_error: " << rv; 123b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) PostMessage(pp::Var(out.str())); 124b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)} 125b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 126b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// This object is the global object representing this plugin library as long 127b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// as it is loaded. 128b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)class MyModule : public pp::Module { 129b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) public: 130b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) MyModule() : pp::Module() {} 131b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) virtual ~MyModule() {} 132b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 133b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) // Override CreateInstance to create your customized Instance object. 134b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) virtual pp::Instance* CreateInstance(PP_Instance instance) { 135b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) return new MyInstance(instance); 136b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 137b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)}; 138b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 139b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)namespace pp { 140b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 141b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)// Factory function for your specialization of the Module object. 142b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)Module* CreateModule() { 143b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) return new MyModule(); 144b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)} 145b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 146b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles)} // namespace pp 147b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) 148