chrome/browser/chromeos/file_system_provider/operations/write_file.cc

   1 // Copyright 2014 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 "chrome/browser/chromeos/file_system_provider/operations/write_file.h"
   6
   7 #include "base/trace_event/trace_event.h"
   8 #include "base/values.h"
   9 #include "chrome/common/extensions/api/file_system_provider.h"
  10 #include "chrome/common/extensions/api/file_system_provider_internal.h"
  11
  12 namespace chromeos {
  13 namespace file_system_provider {
  14 namespace operations {
  15
  16 WriteFile::WriteFile(extensions::EventRouter* event_router,
  17                      const ProvidedFileSystemInfo& file_system_info,
  18                      int file_handle,
  19                      scoped_refptr<net::IOBuffer> buffer,
  20                      int64 offset,
  21                      int length,
  22                      const storage::AsyncFileUtil::StatusCallback& callback)
  23     : Operation(event_router, file_system_info),
  24       file_handle_(file_handle),
  25       buffer_(buffer),
  26       offset_(offset),
  27       length_(length),
  28       callback_(callback) {
  29 }
  30
  31 WriteFile::~WriteFile() {
  32 }
  33
  34 bool WriteFile::Execute(int request_id) {
  35   TRACE_EVENT0("file_system_provider", "WriteFile::Execute");
  36   using extensions::api::file_system_provider::WriteFileRequestedOptions;
  37
  38   if (!file_system_info_.writable())
  39     return false;
  40
  41   WriteFileRequestedOptions options;
  42   options.file_system_id = file_system_info_.file_system_id();
  43   options.request_id = request_id;
  44   options.open_request_id = file_handle_;
  45   options.offset = offset_;
  46   // Length is not passed directly since it can be accessed via data.byteLength.
  47
  48   // Set the data directly on base::Value() to avoid an extra string copy.
  49   DCHECK(buffer_.get());
  50   scoped_ptr<base::DictionaryValue> options_as_value = options.ToValue();
  51   options_as_value->Set(
  52       "data",
  53       base::BinaryValue::CreateWithCopiedBuffer(buffer_->data(), length_));
  54
  55   scoped_ptr<base::ListValue> event_args(new base::ListValue);
  56   event_args->Append(options_as_value.release());
  57
  58   return SendEvent(
  59       request_id,
  60       extensions::api::file_system_provider::OnWriteFileRequested::kEventName,
  61       event_args.Pass());
  62 }
  63
  64 void WriteFile::OnSuccess(int /* request_id */,
  65                           scoped_ptr<RequestValue> /* result */,
  66                           bool /* has_more */) {
  67   TRACE_EVENT0("file_system_provider", "WriteFile::OnSuccess");
  68   callback_.Run(base::File::FILE_OK);
  69 }
  70
  71 void WriteFile::OnError(int /* request_id */,
  72                         scoped_ptr<RequestValue> /* result */,
  73                         base::File::Error error) {
  74   TRACE_EVENT0("file_system_provider", "WriteFile::OnError");
  75   callback_.Run(error);
  76 }
  77
  78 }  // namespace operations
  79 }  // namespace file_system_provider
  80 }  // namespace chromeos