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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/browser/fileapi/file_system_file_stream_reader.h" | |
| 6 | |
| 7 #include "base/files/file_util_proxy.h" | |
| 8 #include "base/single_thread_task_runner.h" | |
| 9 #include "net/base/file_stream.h" | |
| 10 #include "net/base/io_buffer.h" | |
| 11 #include "net/base/net_errors.h" | |
| 12 #include "webkit/browser/blob/file_stream_reader.h" | |
| 13 #include "webkit/browser/fileapi/file_system_context.h" | |
| 14 #include "webkit/browser/fileapi/file_system_operation_runner.h" | |
| 15 | |
| 16 using storage::FileStreamReader; | |
| 17 | |
| 18 // TODO(kinuko): Remove this temporary namespace hack after we move both | |
| 19 // blob and fileapi into content namespace. | |
| 20 namespace storage { | |
| 21 | |
| 22 FileStreamReader* FileStreamReader::CreateForFileSystemFile( | |
| 23 storage::FileSystemContext* file_system_context, | |
| 24 const storage::FileSystemURL& url, | |
| 25 int64 initial_offset, | |
| 26 const base::Time& expected_modification_time) { | |
| 27 return new storage::FileSystemFileStreamReader( | |
| 28 file_system_context, url, initial_offset, expected_modification_time); | |
| 29 } | |
| 30 | |
| 31 } // namespace storage | |
| 32 | |
| 33 namespace storage { | |
| 34 | |
| 35 namespace { | |
| 36 | |
| 37 void ReadAdapter(base::WeakPtr<FileSystemFileStreamReader> reader, | |
| 38 net::IOBuffer* buf, int buf_len, | |
| 39 const net::CompletionCallback& callback) { | |
| 40 if (!reader.get()) | |
| 41 return; | |
| 42 int rv = reader->Read(buf, buf_len, callback); | |
| 43 if (rv != net::ERR_IO_PENDING) | |
| 44 callback.Run(rv); | |
| 45 } | |
| 46 | |
| 47 void GetLengthAdapter(base::WeakPtr<FileSystemFileStreamReader> reader, | |
| 48 const net::Int64CompletionCallback& callback) { | |
| 49 if (!reader.get()) | |
| 50 return; | |
| 51 int rv = reader->GetLength(callback); | |
| 52 if (rv != net::ERR_IO_PENDING) | |
| 53 callback.Run(rv); | |
| 54 } | |
| 55 | |
| 56 void Int64CallbackAdapter(const net::Int64CompletionCallback& callback, | |
| 57 int value) { | |
| 58 callback.Run(value); | |
| 59 } | |
| 60 | |
| 61 } // namespace | |
| 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 FileSystemFileStreamReader::FileSystemFileStreamReader( | |
| 87 FileSystemContext* file_system_context, | |
| 88 const FileSystemURL& url, | |
| 89 int64 initial_offset, | |
| 90 const base::Time& expected_modification_time) | |
| 91 : file_system_context_(file_system_context), | |
| 92 url_(url), | |
| 93 initial_offset_(initial_offset), | |
| 94 expected_modification_time_(expected_modification_time), | |
| 95 has_pending_create_snapshot_(false), | |
| 96 weak_factory_(this) { | |
| 97 } | |
| 98 | |
| 99 int FileSystemFileStreamReader::CreateSnapshot( | |
| 100 const base::Closure& callback, | |
| 101 const net::CompletionCallback& error_callback) { | |
| 102 DCHECK(!has_pending_create_snapshot_); | |
| 103 has_pending_create_snapshot_ = true; | |
| 104 file_system_context_->operation_runner()->CreateSnapshotFile( | |
| 105 url_, | |
| 106 base::Bind(&FileSystemFileStreamReader::DidCreateSnapshot, | |
| 107 weak_factory_.GetWeakPtr(), | |
| 108 callback, | |
| 109 error_callback)); | |
| 110 return net::ERR_IO_PENDING; | |
| 111 } | |
| 112 | |
| 113 void FileSystemFileStreamReader::DidCreateSnapshot( | |
| 114 const base::Closure& callback, | |
| 115 const net::CompletionCallback& error_callback, | |
| 116 base::File::Error file_error, | |
| 117 const base::File::Info& file_info, | |
| 118 const base::FilePath& platform_path, | |
| 119 const scoped_refptr<storage::ShareableFileReference>& file_ref) { | |
| 120 DCHECK(has_pending_create_snapshot_); | |
| 121 DCHECK(!local_file_reader_.get()); | |
| 122 has_pending_create_snapshot_ = false; | |
| 123 | |
| 124 if (file_error != base::File::FILE_OK) { | |
| 125 error_callback.Run(net::FileErrorToNetError(file_error)); | |
| 126 return; | |
| 127 } | |
| 128 | |
| 129 // Keep the reference (if it's non-null) so that the file won't go away. | |
| 130 snapshot_ref_ = file_ref; | |
| 131 | |
| 132 local_file_reader_.reset( | |
| 133 FileStreamReader::CreateForLocalFile( | |
| 134 file_system_context_->default_file_task_runner(), | |
| 135 platform_path, initial_offset_, expected_modification_time_)); | |
| 136 | |
| 137 callback.Run(); | |
| 138 } | |
| 139 | |
| 140 } // namespace storage | |
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Chromium Code Reviews
Issue 539143002:
Migrate webkit/browser/ to storage/browser/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master