components/cronet/android/wrapped_channel_upload_element_reader.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 "components/cronet/android/wrapped_channel_upload_element_reader.h"
   6
   7 #include "base/android/jni_android.h"
   8 #include "base/logging.h"
   9 #include "net/base/io_buffer.h"
  10 #include "net/base/net_errors.h"
  11
  12 namespace cronet {
  13
  14 WrappedChannelElementReader::WrappedChannelElementReader(
  15     scoped_refptr<URLRequestAdapter::URLRequestAdapterDelegate> delegate,
  16     uint64 length)
  17     : length_(length), offset_(0), delegate_(delegate) {
  18 }
  19
  20 WrappedChannelElementReader::~WrappedChannelElementReader() {
  21 }
  22
  23 int WrappedChannelElementReader::Init(const net::CompletionCallback& callback) {
  24   if (offset_ != 0)
  25     return net::ERR_UPLOAD_STREAM_REWIND_NOT_SUPPORTED;
  26   return net::OK;
  27 }
  28
  29 uint64 WrappedChannelElementReader::GetContentLength() const {
  30   return length_;
  31 }
  32
  33 uint64 WrappedChannelElementReader::BytesRemaining() const {
  34   return length_ - offset_;
  35 }
  36
  37 bool WrappedChannelElementReader::IsInMemory() const {
  38   return false;
  39 }
  40
  41 int WrappedChannelElementReader::Read(net::IOBuffer* buf,
  42                                       int buf_length,
  43                                       const net::CompletionCallback& callback) {
  44   DCHECK(!callback.is_null());
  45   DCHECK(delegate_.get());
  46   // TODO(mef): Post the read to file thread.
  47   int bytes_read = delegate_->ReadFromUploadChannel(buf, buf_length);
  48   if (bytes_read < 0)
  49     return net::ERR_FAILED;
  50   offset_ += bytes_read;
  51   return bytes_read;
  52 }
  53
  54 }  // namespace cronet
  55