net/base/upload_bytes_element_reader.h

   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 #ifndef NET_BASE_UPLOAD_BYTES_ELEMENT_READER_H_
   6 #define NET_BASE_UPLOAD_BYTES_ELEMENT_READER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "net/base/upload_element_reader.h"
  14
  15 namespace net {
  16
  17 // An UploadElementReader implementation for bytes.
  18 // |data| should outlive this class because this class does not take the
  19 // ownership of the data.
  20 class NET_EXPORT UploadBytesElementReader : public UploadElementReader {
  21  public:
  22   UploadBytesElementReader(const char* bytes, uint64 length);
  23   virtual ~UploadBytesElementReader();
  24
  25   const char* bytes() const { return bytes_; }
  26   uint64 length() const { return length_; }
  27
  28   // UploadElementReader overrides:
  29   virtual const UploadBytesElementReader* AsBytesReader() const OVERRIDE;
  30   virtual int Init(const CompletionCallback& callback) OVERRIDE;
  31   virtual uint64 GetContentLength() const OVERRIDE;
  32   virtual uint64 BytesRemaining() const OVERRIDE;
  33   virtual bool IsInMemory() const OVERRIDE;
  34   virtual int Read(IOBuffer* buf,
  35                    int buf_length,
  36                    const CompletionCallback& callback) OVERRIDE;
  37
  38  private:
  39   const char* const bytes_;
  40   const uint64 length_;
  41   uint64 offset_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(UploadBytesElementReader);
  44 };
  45
  46 // A subclass of UplodBytesElementReader which owns the data given as a vector.
  47 class NET_EXPORT UploadOwnedBytesElementReader
  48     : public UploadBytesElementReader {
  49  public:
  50   // |data| is cleared by this ctor.
  51   explicit UploadOwnedBytesElementReader(std::vector<char>* data);
  52   virtual ~UploadOwnedBytesElementReader();
  53
  54   // Creates UploadOwnedBytesElementReader with a string.
  55   static UploadOwnedBytesElementReader* CreateWithString(
  56       const std::string& string);
  57
  58  private:
  59   std::vector<char> data_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(UploadOwnedBytesElementReader);
  62 };
  63
  64 }  // namespace net
  65
  66 #endif  // NET_BASE_UPLOAD_BYTES_ELEMENT_READER_H_