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   offset_ = 0;
  25   return net::OK;
  26 }
  27
  28 uint64 WrappedChannelElementReader::GetContentLength() const {
  29   return length_;
  30 }
  31
  32 uint64 WrappedChannelElementReader::BytesRemaining() const {
  33   return length_ - offset_;
  34 }
  35
  36 bool WrappedChannelElementReader::IsInMemory() const {
  37   return false;
  38 }
  39
  40 int WrappedChannelElementReader::Read(net::IOBuffer* buf,
  41                                       int buf_length,
  42                                       const net::CompletionCallback& callback) {
  43   DCHECK(!callback.is_null());
  44   DCHECK(delegate_);
  45   // TODO(mef): Post the read to file thread.
  46   int bytes_read = delegate_->ReadFromUploadChannel(buf, buf_length);
  47   if (bytes_read < 0)
  48     return net::ERR_FAILED;
  49   offset_ += bytes_read;
  50   return bytes_read;
  51 }
  52
  53 }  // namespace cronet
  54