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comparison OrthancFramework/Sources/HttpServer/HttpStreamTranscoder.h @ 4044:d25f4c0fa160 framework

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splitting code into OrthancFramework and OrthancServer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 10 Jun 2020 20:30:34 +0200
parents Core/HttpServer/HttpStreamTranscoder.h@f9863630ec7f
children bf7b9edf6b81
comparison
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4043:6c6239aec462 4044:d25f4c0fa160
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
11 *
12 * In addition, as a special exception, the copyright holders of this
13 * program give permission to link the code of its release with the
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
15 * that use the same license as the "OpenSSL" library), and distribute
16 * the linked executables. You must obey the GNU General Public License
17 * in all respects for all of the code used other than "OpenSSL". If you
18 * modify file(s) with this exception, you may extend this exception to
19 * your version of the file(s), but you are not obligated to do so. If
20 * you do not wish to do so, delete this exception statement from your
21 * version. If you delete this exception statement from all source files
22 * in the program, then also delete it here.
23 *
24 * This program is distributed in the hope that it will be useful, but
25 * WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
31 **/
32
33
34 #pragma once
35
36 #include "BufferHttpSender.h"
37
38 #include "../Compatibility.h"
39
40 #include <memory> // For std::unique_ptr
41
42 namespace Orthanc
43 {
44 class ORTHANC_PUBLIC HttpStreamTranscoder : public IHttpStreamAnswer
45 {
46 private:
47 IHttpStreamAnswer& source_;
48 CompressionType sourceCompression_;
49 uint64_t bytesToSkip_;
50 uint64_t skipped_;
51 uint64_t currentChunkOffset_;
52 bool ready_;
53
54 std::unique_ptr<BufferHttpSender> uncompressed_;
55
56 void ReadSource(std::string& buffer);
57
58 HttpCompression SetupZlibCompression(bool deflateAllowed);
59
60 public:
61 HttpStreamTranscoder(IHttpStreamAnswer& source,
62 CompressionType compression) :
63 source_(source),
64 sourceCompression_(compression),
65 bytesToSkip_(0),
66 skipped_(0),
67 currentChunkOffset_(0),
68 ready_(false)
69 {
70 }
71
72 // This is the first method to be called
73 virtual HttpCompression SetupHttpCompression(bool gzipAllowed,
74 bool deflateAllowed);
75
76 virtual bool HasContentFilename(std::string& filename)
77 {
78 return source_.HasContentFilename(filename);
79 }
80
81 virtual std::string GetContentType()
82 {
83 return source_.GetContentType();
84 }
85
86 virtual uint64_t GetContentLength();
87
88 virtual bool ReadNextChunk();
89
90 virtual const char* GetChunkContent();
91
92 virtual size_t GetChunkSize();
93 };
94 }