Mercurial > hg > orthanc
annotate Core/HttpClient.cpp @ 1243:3a3e7e3e244f
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 08 Dec 2014 10:10:35 +0100 |
parents | b17b6bd59747 |
children | 88010d8e12cf |
rev | line source |
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0 | 1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
689 | 3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege, |
0 | 4 * Belgium |
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. |
0 | 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. |
0 | 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/>. |
0 | 30 **/ |
31 | |
32 | |
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33 #include "PrecompiledHeaders.h" |
0 | 34 #include "HttpClient.h" |
35 | |
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36 #include "../Core/Toolbox.h" |
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37 #include "../Core/OrthancException.h" |
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38 |
0 | 39 #include <string.h> |
40 #include <curl/curl.h> | |
41 | |
42 | |
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43 namespace Orthanc |
0 | 44 { |
45 struct HttpClient::PImpl | |
46 { | |
47 CURL* curl_; | |
48 struct curl_slist *postHeaders_; | |
49 }; | |
50 | |
51 | |
52 static CURLcode CheckCode(CURLcode code) | |
53 { | |
54 if (code != CURLE_OK) | |
55 { | |
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56 throw OrthancException("libCURL error: " + std::string(curl_easy_strerror(code))); |
0 | 57 } |
58 | |
59 return code; | |
60 } | |
61 | |
62 | |
63 static size_t CurlCallback(void *buffer, size_t size, size_t nmemb, void *payload) | |
64 { | |
65 std::string& target = *(static_cast<std::string*>(payload)); | |
66 | |
67 size_t length = size * nmemb; | |
68 if (length == 0) | |
69 return 0; | |
70 | |
71 size_t pos = target.size(); | |
72 | |
73 target.resize(pos + length); | |
74 memcpy(&target.at(pos), buffer, length); | |
75 | |
76 return length; | |
77 } | |
78 | |
79 | |
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80 void HttpClient::Setup() |
0 | 81 { |
82 pimpl_->postHeaders_ = NULL; | |
83 if ((pimpl_->postHeaders_ = curl_slist_append(pimpl_->postHeaders_, "Expect:")) == NULL) | |
84 { | |
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85 throw OrthancException(ErrorCode_NotEnoughMemory); |
0 | 86 } |
87 | |
88 pimpl_->curl_ = curl_easy_init(); | |
89 if (!pimpl_->curl_) | |
90 { | |
91 curl_slist_free_all(pimpl_->postHeaders_); | |
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92 throw OrthancException(ErrorCode_NotEnoughMemory); |
0 | 93 } |
94 | |
95 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEFUNCTION, &CurlCallback)); | |
96 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HEADER, 0)); | |
97 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_FOLLOWLOCATION, 1)); | |
98 | |
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99 #if ORTHANC_SSL_ENABLED == 1 |
26 | 100 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_SSL_VERIFYPEER, 0)); |
101 #endif | |
102 | |
456 | 103 // This fixes the "longjmp causes uninitialized stack frame" crash |
104 // that happens on modern Linux versions. | |
105 // http://stackoverflow.com/questions/9191668/error-longjmp-causes-uninitialized-stack-frame | |
106 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOSIGNAL, 1)); | |
107 | |
0 | 108 url_ = ""; |
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109 method_ = HttpMethod_Get; |
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110 lastStatus_ = HttpStatus_200_Ok; |
0 | 111 isVerbose_ = false; |
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112 timeout_ = 0; |
0 | 113 } |
114 | |
115 | |
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116 HttpClient::HttpClient() : pimpl_(new PImpl) |
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117 { |
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118 Setup(); |
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119 } |
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120 |
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121 |
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122 HttpClient::HttpClient(const HttpClient& other) : pimpl_(new PImpl) |
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123 { |
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124 Setup(); |
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125 |
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126 if (other.IsVerbose()) |
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127 { |
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128 SetVerbose(true); |
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129 } |
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130 |
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131 if (other.credentials_.size() != 0) |
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132 { |
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133 credentials_ = other.credentials_; |
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134 } |
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135 } |
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136 |
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137 |
0 | 138 HttpClient::~HttpClient() |
139 { | |
140 curl_easy_cleanup(pimpl_->curl_); | |
141 curl_slist_free_all(pimpl_->postHeaders_); | |
142 } | |
143 | |
144 | |
145 void HttpClient::SetVerbose(bool isVerbose) | |
146 { | |
147 isVerbose_ = isVerbose; | |
148 | |
149 if (isVerbose_) | |
150 { | |
151 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 1)); | |
152 } | |
153 else | |
154 { | |
155 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 0)); | |
156 } | |
157 } | |
158 | |
159 | |
160 bool HttpClient::Apply(std::string& answer) | |
161 { | |
162 answer.clear(); | |
163 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_URL, url_.c_str())); | |
164 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEDATA, &answer)); | |
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165 |
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166 // Reset the parameters from previous calls to Apply() |
0 | 167 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, NULL)); |
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168 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPGET, 0L)); |
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169 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POST, 0L)); |
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170 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOBODY, 0L)); |
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171 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, NULL)); |
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172 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, NULL)); |
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173 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, 0)); |
0 | 174 |
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175 // Set timeouts |
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176 if (timeout_ <= 0) |
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177 { |
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178 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_TIMEOUT, 10)); /* default: 10 seconds */ |
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179 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CONNECTTIMEOUT, 10)); /* default: 10 seconds */ |
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180 } |
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181 else |
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182 { |
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183 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_TIMEOUT, timeout_)); |
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184 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CONNECTTIMEOUT, timeout_)); |
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185 } |
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186 |
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187 if (credentials_.size() != 0) |
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188 { |
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189 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_USERPWD, credentials_.c_str())); |
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190 } |
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191 |
0 | 192 switch (method_) |
193 { | |
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194 case HttpMethod_Get: |
0 | 195 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPGET, 1L)); |
196 break; | |
197 | |
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198 case HttpMethod_Post: |
0 | 199 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POST, 1L)); |
200 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, pimpl_->postHeaders_)); | |
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201 break; |
0 | 202 |
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203 case HttpMethod_Delete: |
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204 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOBODY, 1L)); |
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205 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, "DELETE")); |
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206 break; |
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207 |
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208 case HttpMethod_Put: |
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209 // http://stackoverflow.com/a/7570281/881731: Don't use |
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210 // CURLOPT_PUT if there is a body |
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211 |
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212 // CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PUT, 1L)); |
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213 |
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214 curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, "PUT"); /* !!! */ |
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215 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, pimpl_->postHeaders_)); |
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216 break; |
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217 |
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218 default: |
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219 throw OrthancException(ErrorCode_InternalError); |
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220 } |
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221 |
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222 |
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223 if (method_ == HttpMethod_Post || |
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224 method_ == HttpMethod_Put) |
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225 { |
0 | 226 if (postData_.size() > 0) |
227 { | |
228 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, postData_.c_str())); | |
229 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, postData_.size())); | |
230 } | |
231 else | |
232 { | |
233 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, NULL)); | |
234 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, 0)); | |
235 } | |
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236 } |
0 | 237 |
238 | |
239 // Do the actual request | |
240 CheckCode(curl_easy_perform(pimpl_->curl_)); | |
241 | |
242 long status; | |
243 CheckCode(curl_easy_getinfo(pimpl_->curl_, CURLINFO_RESPONSE_CODE, &status)); | |
244 | |
245 if (status == 0) | |
246 { | |
247 // This corresponds to a call to an inexistent host | |
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248 lastStatus_ = HttpStatus_500_InternalServerError; |
0 | 249 } |
250 else | |
251 { | |
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252 lastStatus_ = static_cast<HttpStatus>(status); |
0 | 253 } |
254 | |
255 return (status >= 200 && status < 300); | |
256 } | |
257 | |
258 | |
259 bool HttpClient::Apply(Json::Value& answer) | |
260 { | |
261 std::string s; | |
262 if (Apply(s)) | |
263 { | |
264 Json::Reader reader; | |
265 return reader.parse(s, answer); | |
266 } | |
267 else | |
268 { | |
269 return false; | |
270 } | |
271 } | |
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272 |
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273 |
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274 void HttpClient::SetCredentials(const char* username, |
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275 const char* password) |
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276 { |
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277 credentials_ = std::string(username) + ":" + std::string(password); |
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278 } |
457 | 279 |
280 | |
281 void HttpClient::GlobalInitialize() | |
282 { | |
283 CheckCode(curl_global_init(CURL_GLOBAL_DEFAULT)); | |
284 } | |
285 | |
286 void HttpClient::GlobalFinalize() | |
287 { | |
288 curl_global_cleanup(); | |
289 } | |
0 | 290 } |