Mercurial > hg > orthanc
annotate OrthancFramework/Sources/HttpServer/HttpContentNegociation.cpp @ 4664:f9eda86f9045
ImageProcessing::Convert() from Float32 to RGB24
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 14 May 2021 11:46:57 +0200 |
parents | d9473bd5ed43 |
children | 7053502fbf97 |
rev | line source |
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1783 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
1900 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
1783 | 4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium |
1783 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
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8 * modify it under the terms of the GNU Lesser General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
1783 | 11 * |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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15 * Lesser General Public License for more details. |
1783 | 16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
1783 | 20 **/ |
21 | |
22 | |
23 #include "../PrecompiledHeaders.h" | |
24 #include "HttpContentNegociation.h" | |
25 | |
26 #include "../Logging.h" | |
27 #include "../OrthancException.h" | |
28 #include "../Toolbox.h" | |
29 | |
30 #include <boost/lexical_cast.hpp> | |
31 | |
32 namespace Orthanc | |
33 { | |
34 HttpContentNegociation::Handler::Handler(const std::string& type, | |
35 const std::string& subtype, | |
36 IHandler& handler) : | |
37 type_(type), | |
38 subtype_(subtype), | |
39 handler_(handler) | |
40 { | |
41 } | |
42 | |
43 | |
44 bool HttpContentNegociation::Handler::IsMatch(const std::string& type, | |
45 const std::string& subtype) const | |
46 { | |
47 if (type == "*" && subtype == "*") | |
48 { | |
49 return true; | |
50 } | |
51 | |
52 if (subtype == "*" && type == type_) | |
53 { | |
54 return true; | |
55 } | |
56 | |
57 return type == type_ && subtype == subtype_; | |
58 } | |
59 | |
60 | |
61 struct HttpContentNegociation::Reference : public boost::noncopyable | |
62 { | |
63 const Handler& handler_; | |
64 uint8_t level_; | |
65 float quality_; | |
66 | |
67 Reference(const Handler& handler, | |
68 const std::string& type, | |
69 const std::string& subtype, | |
70 float quality) : | |
71 handler_(handler), | |
72 quality_(quality) | |
73 { | |
74 if (type == "*" && subtype == "*") | |
75 { | |
76 level_ = 0; | |
77 } | |
78 else if (subtype == "*") | |
79 { | |
80 level_ = 1; | |
81 } | |
82 else | |
83 { | |
84 level_ = 2; | |
85 } | |
86 } | |
87 | |
88 bool operator< (const Reference& other) const | |
89 { | |
90 if (level_ < other.level_) | |
91 { | |
92 return true; | |
93 } | |
94 | |
95 if (level_ > other.level_) | |
96 { | |
97 return false; | |
98 } | |
99 | |
100 return quality_ < other.quality_; | |
101 } | |
102 }; | |
103 | |
104 | |
105 bool HttpContentNegociation::SplitPair(std::string& first /* out */, | |
106 std::string& second /* out */, | |
107 const std::string& source, | |
108 char separator) | |
109 { | |
110 size_t pos = source.find(separator); | |
111 | |
112 if (pos == std::string::npos) | |
113 { | |
114 return false; | |
115 } | |
116 else | |
117 { | |
118 first = Toolbox::StripSpaces(source.substr(0, pos)); | |
119 second = Toolbox::StripSpaces(source.substr(pos + 1)); | |
120 return true; | |
121 } | |
122 } | |
123 | |
124 | |
125 float HttpContentNegociation::GetQuality(const Tokens& parameters) | |
126 { | |
127 for (size_t i = 1; i < parameters.size(); i++) | |
128 { | |
129 std::string key, value; | |
130 if (SplitPair(key, value, parameters[i], '=') && | |
131 key == "q") | |
132 { | |
133 float quality; | |
134 bool ok = false; | |
135 | |
136 try | |
137 { | |
138 quality = boost::lexical_cast<float>(value); | |
139 ok = (quality >= 0.0f && quality <= 1.0f); | |
140 } | |
141 catch (boost::bad_lexical_cast&) | |
142 { | |
143 } | |
144 | |
145 if (ok) | |
146 { | |
147 return quality; | |
148 } | |
149 else | |
150 { | |
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151 throw OrthancException( |
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152 ErrorCode_BadRequest, |
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153 "Quality parameter out of range in a HTTP request (must be between 0 and 1): " + value); |
1783 | 154 } |
155 } | |
156 } | |
157 | |
158 return 1.0f; // Default quality | |
159 } | |
160 | |
161 | |
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162 void HttpContentNegociation::SelectBestMatch(std::unique_ptr<Reference>& best, |
1783 | 163 const Handler& handler, |
164 const std::string& type, | |
165 const std::string& subtype, | |
166 float quality) | |
167 { | |
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168 std::unique_ptr<Reference> match(new Reference(handler, type, subtype, quality)); |
1783 | 169 |
170 if (best.get() == NULL || | |
171 *best < *match) | |
172 { | |
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173 #if __cplusplus < 201103L |
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174 best.reset(match.release()); |
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175 #else |
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176 best = std::move(match); |
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177 #endif |
1783 | 178 } |
179 } | |
180 | |
181 | |
182 void HttpContentNegociation::Register(const std::string& mime, | |
183 IHandler& handler) | |
184 { | |
185 std::string type, subtype; | |
186 | |
187 if (SplitPair(type, subtype, mime, '/') && | |
188 type != "*" && | |
189 subtype != "*") | |
190 { | |
191 handlers_.push_back(Handler(type, subtype, handler)); | |
192 } | |
193 else | |
194 { | |
195 throw OrthancException(ErrorCode_ParameterOutOfRange); | |
196 } | |
197 } | |
198 | |
199 | |
200 bool HttpContentNegociation::Apply(const HttpHeaders& headers) | |
201 { | |
202 HttpHeaders::const_iterator accept = headers.find("accept"); | |
203 if (accept != headers.end()) | |
204 { | |
205 return Apply(accept->second); | |
206 } | |
207 else | |
208 { | |
209 return Apply("*/*"); | |
210 } | |
211 } | |
212 | |
213 | |
214 bool HttpContentNegociation::Apply(const std::string& accept) | |
215 { | |
216 // http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1 | |
217 // https://en.wikipedia.org/wiki/Content_negotiation | |
218 // http://www.newmediacampaigns.com/blog/browser-rest-http-accept-headers | |
219 | |
220 Tokens mediaRanges; | |
221 Toolbox::TokenizeString(mediaRanges, accept, ','); | |
222 | |
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223 std::unique_ptr<Reference> bestMatch; |
1783 | 224 |
225 for (Tokens::const_iterator it = mediaRanges.begin(); | |
226 it != mediaRanges.end(); ++it) | |
227 { | |
228 Tokens parameters; | |
229 Toolbox::TokenizeString(parameters, *it, ';'); | |
230 | |
231 if (parameters.size() > 0) | |
232 { | |
233 float quality = GetQuality(parameters); | |
234 | |
235 std::string type, subtype; | |
236 if (SplitPair(type, subtype, parameters[0], '/')) | |
237 { | |
238 for (Handlers::const_iterator it2 = handlers_.begin(); | |
239 it2 != handlers_.end(); ++it2) | |
240 { | |
241 if (it2->IsMatch(type, subtype)) | |
242 { | |
243 SelectBestMatch(bestMatch, *it2, type, subtype, quality); | |
244 } | |
245 } | |
246 } | |
247 } | |
248 } | |
249 | |
250 if (bestMatch.get() == NULL) // No match was found | |
251 { | |
252 return false; | |
253 } | |
254 else | |
255 { | |
256 bestMatch->handler_.Call(); | |
257 return true; | |
258 } | |
259 } | |
260 } |