1// libjingle
2// Copyright 2004--2010, Google Inc.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are met:
6//
7//  1. Redistributions of source code must retain the above copyright notice,
8//     this list of conditions and the following disclaimer.
9//  2. Redistributions in binary form must reproduce the above copyright notice,
10//     this list of conditions and the following disclaimer in the documentation
11//     and/or other materials provided with the distribution.
12//  3. The name of the author may not be used to endorse or promote products
13//     derived from this software without specific prior written permission.
14//
15// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
16// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
17// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
18// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25
26#ifndef TALK_BASE_MULTIPART_H__
27#define TALK_BASE_MULTIPART_H__
28
29#include <string>
30#include <vector>
31
32#include "talk/base/sigslot.h"
33#include "talk/base/stream.h"
34
35namespace talk_base {
36
37///////////////////////////////////////////////////////////////////////////////
38// MultipartStream - Implements an RFC2046 multipart stream by concatenating
39// the supplied parts together, and adding the correct boundaries.
40///////////////////////////////////////////////////////////////////////////////
41
42class MultipartStream : public StreamInterface, public sigslot::has_slots<> {
43 public:
44  MultipartStream(const std::string& type, const std::string& boundary);
45  virtual ~MultipartStream();
46
47  void GetContentType(std::string* content_type);
48
49  // Note: If content_disposition and/or content_type are the empty string,
50  // they will be omitted.
51  bool AddPart(StreamInterface* data_stream,
52               const std::string& content_disposition,
53               const std::string& content_type);
54  bool AddPart(const std::string& data,
55               const std::string& content_disposition,
56               const std::string& content_type);
57  void EndParts();
58
59  // Calculates the size of a part before actually adding the part.
60  size_t GetPartSize(const std::string& data,
61                     const std::string& content_disposition,
62                     const std::string& content_type) const;
63  size_t GetEndPartSize() const;
64
65  // StreamInterface
66  virtual StreamState GetState() const;
67  virtual StreamResult Read(void* buffer, size_t buffer_len,
68                            size_t* read, int* error);
69  virtual StreamResult Write(const void* data, size_t data_len,
70                             size_t* written, int* error);
71  virtual void Close();
72  virtual bool SetPosition(size_t position);
73  virtual bool GetPosition(size_t* position) const;
74  virtual bool GetSize(size_t* size) const;
75  virtual bool GetAvailable(size_t* size) const;
76
77 private:
78  typedef std::vector<StreamInterface*> PartList;
79
80  // StreamInterface Slots
81  void OnEvent(StreamInterface* stream, int events, int error);
82
83  std::string type_, boundary_;
84  PartList parts_;
85  bool adding_;
86  size_t current_;  // The index into parts_ of the current read position.
87  size_t position_;  // The current read position in bytes.
88
89  DISALLOW_COPY_AND_ASSIGN(MultipartStream);
90};
91
92}  // namespace talk_base
93
94#endif  // TALK_BASE_MULTIPART_H__
95