annotate OrthancFramework/Sources/HttpServer/HttpStreamTranscoder.h @ 4844:55e8fb8e8028

tagging a pre-release of the Orthanc framework for WSI 1.1
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Dec 2021 14:01:17 +0100
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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 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #pragma once
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26 #include "BufferHttpSender.h"
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28 #include "../Compatibility.h"
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30 #include <memory> // For std::unique_ptr
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31
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32 namespace Orthanc
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33 {
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34 class ORTHANC_PUBLIC HttpStreamTranscoder : public IHttpStreamAnswer
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35 {
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36 private:
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37 IHttpStreamAnswer& source_;
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38 CompressionType sourceCompression_;
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39 uint64_t bytesToSkip_;
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40 uint64_t skipped_;
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41 uint64_t currentChunkOffset_;
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42 bool ready_;
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43
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44 std::unique_ptr<BufferHttpSender> uncompressed_;
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46 void ReadSource(std::string& buffer);
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48 HttpCompression SetupZlibCompression(bool deflateAllowed);
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49
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50 public:
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51 HttpStreamTranscoder(IHttpStreamAnswer& source,
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52 CompressionType compression);
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53
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54 // This is the first method to be called
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55 virtual HttpCompression SetupHttpCompression(bool gzipAllowed,
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56 bool deflateAllowed) ORTHANC_OVERRIDE;
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57
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58 virtual bool HasContentFilename(std::string& filename) ORTHANC_OVERRIDE;
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59
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60 virtual std::string GetContentType() ORTHANC_OVERRIDE;
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61
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62 virtual uint64_t GetContentLength() ORTHANC_OVERRIDE;
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63
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64 virtual bool ReadNextChunk() ORTHANC_OVERRIDE;
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65
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66 virtual const char* GetChunkContent() ORTHANC_OVERRIDE;
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67
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68 virtual size_t GetChunkSize() ORTHANC_OVERRIDE;
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69 };
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70 }