1// Copyright (c) 2012 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#include "content/child/npapi/plugin_stream.h" 6 7#include "base/logging.h" 8#include "content/child/npapi/plugin_instance.h" 9 10namespace content { 11 12void PluginStream::ResetTempFileHandle() { 13 temp_file_handle_ = INVALID_HANDLE_VALUE; 14} 15 16void PluginStream::ResetTempFileName() { 17 temp_file_name_[0] = '\0'; 18} 19 20void PluginStream::WriteAsFile() { 21 if (RequestedPluginModeIsAsFile()) 22 instance_->NPP_StreamAsFile(&stream_, temp_file_name_); 23} 24 25size_t PluginStream::WriteBytes(const char *buf, size_t length) { 26 DWORD bytes; 27 28 if (!WriteFile(temp_file_handle_, buf, length, &bytes, 0)) 29 return 0U; 30 31 return static_cast<size_t>(bytes); 32} 33 34bool PluginStream::OpenTempFile() { 35 DCHECK_EQ(INVALID_HANDLE_VALUE, temp_file_handle_); 36 37 // The reason for using all the Ascii versions of these filesystem 38 // calls is that the filename which we pass back to the plugin 39 // via NPAPI is an ascii filename. Otherwise, we'd use wide-chars. 40 // 41 // TODO: 42 // This is a bug in NPAPI itself, and it needs to be fixed. 43 // The case which will fail is if a user has a multibyte name, 44 // but has the system locale set to english. GetTempPathA will 45 // return junk in this case, causing us to be unable to open the 46 // file. 47 48 char temp_directory[MAX_PATH]; 49 if (GetTempPathA(MAX_PATH, temp_directory) == 0) 50 return false; 51 if (GetTempFileNameA(temp_directory, "npstream", 0, temp_file_name_) == 0) 52 return false; 53 temp_file_handle_ = CreateFileA(temp_file_name_, 54 FILE_ALL_ACCESS, 55 FILE_SHARE_READ, 56 0, 57 CREATE_ALWAYS, 58 FILE_ATTRIBUTE_NORMAL, 59 0); 60 if (temp_file_handle_ == INVALID_HANDLE_VALUE) { 61 ResetTempFileName(); 62 return false; 63 } 64 return true; 65} 66 67void PluginStream::CloseTempFile() { 68 if (!TempFileIsValid()) 69 return; 70 71 CloseHandle(temp_file_handle_); 72 ResetTempFileHandle(); 73} 74 75bool PluginStream::TempFileIsValid() const { 76 return temp_file_handle_ != INVALID_HANDLE_VALUE; 77} 78 79} // namespace content 80