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| 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 "webkit/fileapi/file_system_file_stream_reader.h" | |
| 6 | |
| 7 #include "base/files/file_util_proxy.h" | |
| 8 #include "base/platform_file.h" | |
| 9 #include "base/single_thread_task_runner.h" | |
| 10 #include "net/base/file_stream.h" | |
| 11 #include "net/base/io_buffer.h" | |
| 12 #include "net/base/net_errors.h" | |
| 13 #include "webkit/blob/local_file_stream_reader.h" | |
| 14 #include "webkit/browser/fileapi/file_system_task_runners.h" | |
| 15 #include "webkit/fileapi/file_system_context.h" | |
| 16 #include "webkit/fileapi/file_system_operation.h" | |
| 17 | |
| 18 using webkit_blob::LocalFileStreamReader; | |
| 19 | |
| 20 namespace fileapi { | |
| 21 | |
| 22 namespace { | |
| 23 | |
| 24 void ReadAdapter(base::WeakPtr<FileSystemFileStreamReader> reader, | |
| 25 net::IOBuffer* buf, int buf_len, | |
| 26 const net::CompletionCallback& callback) { | |
| 27 if (!reader) | |
| 28 return; | |
| 29 int rv = reader->Read(buf, buf_len, callback); | |
| 30 if (rv != net::ERR_IO_PENDING) | |
| 31 callback.Run(rv); | |
| 32 } | |
| 33 | |
| 34 void GetLengthAdapter(base::WeakPtr<FileSystemFileStreamReader> reader, | |
| 35 const net::Int64CompletionCallback& callback) { | |
| 36 if (!reader) | |
| 37 return; | |
| 38 int rv = reader->GetLength(callback); | |
| 39 if (rv != net::ERR_IO_PENDING) | |
| 40 callback.Run(rv); | |
| 41 } | |
| 42 | |
| 43 void Int64CallbackAdapter(const net::Int64CompletionCallback& callback, | |
| 44 int value) { | |
| 45 callback.Run(value); | |
| 46 } | |
| 47 | |
| 48 } // namespace | |
| 49 | |
| 50 FileSystemFileStreamReader::FileSystemFileStreamReader( | |
| 51 FileSystemContext* file_system_context, | |
| 52 const FileSystemURL& url, | |
| 53 int64 initial_offset, | |
| 54 const base::Time& expected_modification_time) | |
| 55 : file_system_context_(file_system_context), | |
| 56 url_(url), | |
| 57 initial_offset_(initial_offset), | |
| 58 expected_modification_time_(expected_modification_time), | |
| 59 has_pending_create_snapshot_(false), | |
| 60 weak_factory_(this) { | |
| 61 } | |
| 62 | |
| 63 FileSystemFileStreamReader::~FileSystemFileStreamReader() { | |
| 64 } | |
| 65 | |
| 66 int FileSystemFileStreamReader::Read( | |
| 67 net::IOBuffer* buf, int buf_len, | |
| 68 const net::CompletionCallback& callback) { | |
| 69 if (local_file_reader_) | |
| 70 return local_file_reader_->Read(buf, buf_len, callback); | |
| 71 return CreateSnapshot( | |
| 72 base::Bind(&ReadAdapter, weak_factory_.GetWeakPtr(), | |
| 73 make_scoped_refptr(buf), buf_len, callback), | |
| 74 callback); | |
| 75 } | |
| 76 | |
| 77 int64 FileSystemFileStreamReader::GetLength( | |
| 78 const net::Int64CompletionCallback& callback) { | |
| 79 if (local_file_reader_) | |
| 80 return local_file_reader_->GetLength(callback); | |
| 81 return CreateSnapshot( | |
| 82 base::Bind(&GetLengthAdapter, weak_factory_.GetWeakPtr(), callback), | |
| 83 base::Bind(&Int64CallbackAdapter, callback)); | |
| 84 } | |
| 85 | |
| 86 int FileSystemFileStreamReader::CreateSnapshot( | |
| 87 const base::Closure& callback, | |
| 88 const net::CompletionCallback& error_callback) { | |
| 89 DCHECK(!has_pending_create_snapshot_); | |
| 90 base::PlatformFileError error_code; | |
| 91 FileSystemOperation* operation = | |
| 92 file_system_context_->CreateFileSystemOperation(url_, &error_code); | |
| 93 if (error_code != base::PLATFORM_FILE_OK) | |
| 94 return net::PlatformFileErrorToNetError(error_code); | |
| 95 has_pending_create_snapshot_ = true; | |
| 96 operation->CreateSnapshotFile( | |
| 97 url_, | |
| 98 base::Bind(&FileSystemFileStreamReader::DidCreateSnapshot, | |
| 99 weak_factory_.GetWeakPtr(), | |
| 100 callback, | |
| 101 error_callback)); | |
| 102 return net::ERR_IO_PENDING; | |
| 103 } | |
| 104 | |
| 105 void FileSystemFileStreamReader::DidCreateSnapshot( | |
| 106 const base::Closure& callback, | |
| 107 const net::CompletionCallback& error_callback, | |
| 108 base::PlatformFileError file_error, | |
| 109 const base::PlatformFileInfo& file_info, | |
| 110 const base::FilePath& platform_path, | |
| 111 const scoped_refptr<webkit_blob::ShareableFileReference>& file_ref) { | |
| 112 DCHECK(has_pending_create_snapshot_); | |
| 113 DCHECK(!local_file_reader_.get()); | |
| 114 has_pending_create_snapshot_ = false; | |
| 115 | |
| 116 if (file_error != base::PLATFORM_FILE_OK) { | |
| 117 error_callback.Run(net::PlatformFileErrorToNetError(file_error)); | |
| 118 return; | |
| 119 } | |
| 120 | |
| 121 // Keep the reference (if it's non-null) so that the file won't go away. | |
| 122 snapshot_ref_ = file_ref; | |
| 123 | |
| 124 local_file_reader_.reset( | |
| 125 new LocalFileStreamReader( | |
| 126 file_system_context_->task_runners()->file_task_runner(), | |
| 127 platform_path, initial_offset_, expected_modification_time_)); | |
| 128 | |
| 129 callback.Run(); | |
| 130 } | |
| 131 | |
| 132 } // namespace fileapi | |
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Chromium Code Reviews
Issue 15859007:
Move browser-specific FileAPI code from webkit/fileapi to webkit/browser/fileapi (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src