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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_reader.h" | |
| 6 | |
| 7 #include "base/file_util_proxy.h" | |
| 8 #include "base/platform_file.h" | |
| 9 #include "base/sequenced_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_reader.h" | |
| 14 #include "webkit/fileapi/file_system_context.h" | |
| 15 #include "webkit/fileapi/file_system_operation_interface.h" | |
| 16 | |
| 17 using webkit_blob::LocalFileReader; | |
| 18 | |
| 19 namespace fileapi { | |
| 20 | |
| 21 namespace { | |
| 22 | |
| 23 void ReadAdapter(base::WeakPtr<FileSystemFileReader> reader, | |
| 24 net::IOBuffer* buf, int buf_len, | |
| 25 const net::CompletionCallback& callback) { | |
| 26 if (!reader.get()) | |
| 27 return; | |
| 28 int rv = reader->Read(buf, buf_len, callback); | |
| 29 if (rv != net::ERR_IO_PENDING) | |
| 30 callback.Run(rv); | |
| 31 } | |
| 32 | |
| 33 } | |
| 34 | |
| 35 FileSystemFileReader::FileSystemFileReader( | |
| 36 FileSystemContext* file_system_context, | |
| 37 const GURL& url, | |
| 38 int64 initial_offset) | |
| 39 : file_system_context_(file_system_context), | |
| 40 url_(url), | |
| 41 initial_offset_(initial_offset), | |
| 42 has_pending_create_snapshot_(false), | |
| 43 weak_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) { | |
| 44 } | |
| 45 | |
| 46 FileSystemFileReader::~FileSystemFileReader() { | |
| 47 } | |
| 48 | |
| 49 int FileSystemFileReader::Read( | |
| 50 net::IOBuffer* buf, int buf_len, | |
| 51 const net::CompletionCallback& callback) { | |
| 52 if (local_file_reader_.get()) | |
| 53 return local_file_reader_->Read(buf, buf_len, callback); | |
| 54 DCHECK(!has_pending_create_snapshot_); | |
| 55 FileSystemOperationInterface* operation = | |
| 56 file_system_context_->CreateFileSystemOperation(url_); | |
| 57 if (!operation) | |
| 58 return net::ERR_INVALID_URL; | |
| 59 has_pending_create_snapshot_ = true; | |
| 60 operation->CreateSnapshotFile( | |
| 61 url_, | |
| 62 base::Bind(&FileSystemFileReader::DidCreateSnapshot, | |
| 63 weak_factory_.GetWeakPtr(), | |
| 64 base::Bind(&ReadAdapter, weak_factory_.GetWeakPtr(), | |
| 65 make_scoped_refptr(buf), buf_len, callback), | |
| 66 callback)); | |
| 67 return net::ERR_IO_PENDING; | |
| 68 } | |
| 69 | |
| 70 void FileSystemFileReader::DidCreateSnapshot( | |
| 71 const base::Closure& read_closure, | |
| 72 const net::CompletionCallback& callback, | |
| 73 base::PlatformFileError file_error, | |
| 74 const base::PlatformFileInfo& file_info, | |
| 75 const FilePath& platform_path, | |
| 76 const scoped_refptr<webkit_blob::ShareableFileReference>& file_ref) { | |
| 77 DCHECK(has_pending_create_snapshot_); | |
| 78 DCHECK(!local_file_reader_.get()); | |
| 79 has_pending_create_snapshot_ = false; | |
| 80 | |
| 81 if (file_error != base::PLATFORM_FILE_OK) { | |
| 82 callback.Run(LocalFileReader::PlatformFileErrorToNetError(file_error)); | |
| 83 return; | |
| 84 } | |
| 85 | |
| 86 // Keep the reference (if it's non-null) so that the file won't go away. | |
| 87 snapshot_ref_ = file_ref; | |
| 88 | |
| 89 local_file_reader_.reset( | |
| 90 new LocalFileReader(file_system_context_->file_task_runner(), | |
| 91 platform_path, | |
| 92 initial_offset_, | |
| 93 base::Time())); | |
| 94 | |
| 95 read_closure.Run(); | |
| 96 } | |
| 97 | |
| 98 } // namespace fileapi | |
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Chromium Code Reviews
Issue 10447083:
Rename webkit_blob::FileReader to FileStreamReader. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src