components/cronet/android/wrapped_channel_upload_element_reader.h

   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 #ifndef COMPONENTS_CRONET_ANDROID_WRAPPED_CHANNEL_UPLOAD_ELEMENT_READER_H_
   6 #define COMPONENTS_CRONET_ANDROID_WRAPPED_CHANNEL_UPLOAD_ELEMENT_READER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "components/cronet/android/url_request_adapter.h"
  11 #include "net/base/completion_callback.h"
  12 #include "net/base/upload_element_reader.h"
  13
  14 namespace net {
  15 class IOBuffer;
  16 }  // namespace net
  17
  18 namespace cronet {
  19
  20 // An UploadElementReader implementation for
  21 // java.nio.channels.ReadableByteChannel.
  22 // |channel_| should outlive this class because this class does not take the
  23 // ownership of the data.
  24 class WrappedChannelElementReader : public net::UploadElementReader {
  25  public:
  26   WrappedChannelElementReader(
  27       scoped_refptr<URLRequestAdapter::URLRequestAdapterDelegate> delegate,
  28       uint64 length);
  29   ~WrappedChannelElementReader() override;
  30
  31   // UploadElementReader overrides:
  32   int Init(const net::CompletionCallback& callback) override;
  33   uint64 GetContentLength() const override;
  34   uint64 BytesRemaining() const override;
  35   bool IsInMemory() const override;
  36   int Read(net::IOBuffer* buf,
  37            int buf_length,
  38            const net::CompletionCallback& callback) override;
  39
  40  private:
  41   const uint64 length_;
  42   uint64 offset_;
  43   scoped_refptr<URLRequestAdapter::URLRequestAdapterDelegate> delegate_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(WrappedChannelElementReader);
  46 };
  47
  48 }  // namespace cronet
  49
  50 #endif  // COMPONENTS_CRONET_ANDROID_WRAPPED_CHANNEL_UPLOAD_ELEMENT_READER_H_