annotate Core/HttpServer/HttpStreamTranscoder.h @ 2065:272094362301

nacl
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 05 Jul 2016 17:50:18 +0200
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children 29689b30f9ae
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #pragma once
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34
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35 #include "BufferHttpSender.h"
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36
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37 #include <memory> // For std::auto_ptr
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38
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39 namespace Orthanc
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40 {
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41 class HttpStreamTranscoder : public IHttpStreamAnswer
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42 {
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43 private:
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44 IHttpStreamAnswer& source_;
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45 CompressionType sourceCompression_;
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46 uint64_t bytesToSkip_;
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47 uint64_t skipped_;
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48 uint64_t currentChunkOffset_;
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49 bool ready_;
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50
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51 std::auto_ptr<BufferHttpSender> uncompressed_;
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52
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53 void ReadSource(std::string& buffer);
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54
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55 HttpCompression SetupZlibCompression(bool deflateAllowed);
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56
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57 public:
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58 HttpStreamTranscoder(IHttpStreamAnswer& source,
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59 CompressionType compression) :
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60 source_(source),
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61 sourceCompression_(compression),
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62 bytesToSkip_(0),
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63 skipped_(0),
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64 ready_(false)
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65 {
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66 }
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67
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68 // This is the first method to be called
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69 virtual HttpCompression SetupHttpCompression(bool gzipAllowed,
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70 bool deflateAllowed);
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71
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72 virtual bool HasContentFilename(std::string& filename)
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73 {
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74 return source_.HasContentFilename(filename);
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75 }
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76
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77 virtual std::string GetContentType()
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78 {
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79 return source_.GetContentType();
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80 }
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81
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82 virtual uint64_t GetContentLength();
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83
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84 virtual bool ReadNextChunk();
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85
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86 virtual const char* GetChunkContent();
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87
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88 virtual size_t GetChunkSize();
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89 };
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90 }