Mercurial > hg > orthanc
annotate Core/HttpClient.cpp @ 1590:ba0226474e22
New configuration option: "HttpTimeout" to set the default timeout for HTTP requests
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 26 Aug 2015 17:51:03 +0200 |
parents | 95b3b0260240 |
children | 31f4adefb88f |
rev | line source |
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0 | 1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
0 | 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 | |
1404 | 36 #include "Toolbox.h" |
37 #include "OrthancException.h" | |
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38 #include "Logging.h" |
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39 |
0 | 40 #include <string.h> |
41 #include <curl/curl.h> | |
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42 #include <boost/algorithm/string/predicate.hpp> |
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43 |
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44 |
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45 static std::string globalCACertificates_; |
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46 static bool globalVerifyPeers_ = true; |
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47 static long globalTimeout_ = 0; |
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48 |
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49 extern "C" |
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50 { |
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51 static CURLcode GetHttpStatus(CURLcode code, CURL* curl, long* status) |
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52 { |
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53 if (code == CURLE_OK) |
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54 { |
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55 code = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, status); |
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56 return code; |
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57 } |
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58 else |
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59 { |
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60 *status = 0; |
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61 return code; |
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62 } |
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63 } |
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64 |
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65 // This is a dummy wrapper function to suppress any OpenSSL-related |
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66 // problem in valgrind. Inlining is prevented. |
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67 #if defined(__GNUC__) || defined(__clang__) |
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68 __attribute__((noinline)) |
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69 #endif |
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70 static CURLcode OrthancHttpClientPerformSSL(CURL* curl, long* status) |
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71 { |
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72 return GetHttpStatus(curl_easy_perform(curl), curl, status); |
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73 } |
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74 } |
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75 |
0 | 76 |
77 | |
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78 namespace Orthanc |
0 | 79 { |
80 struct HttpClient::PImpl | |
81 { | |
82 CURL* curl_; | |
83 struct curl_slist *postHeaders_; | |
84 }; | |
85 | |
86 | |
87 static CURLcode CheckCode(CURLcode code) | |
88 { | |
89 if (code != CURLE_OK) | |
90 { | |
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91 LOG(ERROR) << "libCURL error: " + std::string(curl_easy_strerror(code)); |
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92 throw OrthancException(ErrorCode_NetworkProtocol); |
0 | 93 } |
94 | |
95 return code; | |
96 } | |
97 | |
98 | |
99 static size_t CurlCallback(void *buffer, size_t size, size_t nmemb, void *payload) | |
100 { | |
101 std::string& target = *(static_cast<std::string*>(payload)); | |
102 | |
103 size_t length = size * nmemb; | |
104 if (length == 0) | |
105 return 0; | |
106 | |
107 size_t pos = target.size(); | |
108 | |
109 target.resize(pos + length); | |
110 memcpy(&target.at(pos), buffer, length); | |
111 | |
112 return length; | |
113 } | |
114 | |
115 | |
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116 void HttpClient::Setup() |
0 | 117 { |
118 pimpl_->postHeaders_ = NULL; | |
119 if ((pimpl_->postHeaders_ = curl_slist_append(pimpl_->postHeaders_, "Expect:")) == NULL) | |
120 { | |
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121 throw OrthancException(ErrorCode_NotEnoughMemory); |
0 | 122 } |
123 | |
124 pimpl_->curl_ = curl_easy_init(); | |
125 if (!pimpl_->curl_) | |
126 { | |
127 curl_slist_free_all(pimpl_->postHeaders_); | |
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128 throw OrthancException(ErrorCode_NotEnoughMemory); |
0 | 129 } |
130 | |
131 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEFUNCTION, &CurlCallback)); | |
132 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HEADER, 0)); | |
133 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_FOLLOWLOCATION, 1)); | |
134 | |
456 | 135 // This fixes the "longjmp causes uninitialized stack frame" crash |
136 // that happens on modern Linux versions. | |
137 // http://stackoverflow.com/questions/9191668/error-longjmp-causes-uninitialized-stack-frame | |
138 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOSIGNAL, 1)); | |
139 | |
0 | 140 url_ = ""; |
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141 method_ = HttpMethod_Get; |
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142 lastStatus_ = HttpStatus_200_Ok; |
0 | 143 isVerbose_ = false; |
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144 timeout_ = globalTimeout_; |
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145 verifyPeers_ = globalVerifyPeers_; |
0 | 146 } |
147 | |
148 | |
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149 HttpClient::HttpClient() : pimpl_(new PImpl) |
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150 { |
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151 Setup(); |
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152 } |
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153 |
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154 |
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155 HttpClient::HttpClient(const HttpClient& other) : pimpl_(new PImpl) |
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156 { |
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157 Setup(); |
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158 |
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159 if (other.IsVerbose()) |
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160 { |
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161 SetVerbose(true); |
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162 } |
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163 |
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164 if (other.credentials_.size() != 0) |
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165 { |
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166 credentials_ = other.credentials_; |
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167 } |
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168 } |
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169 |
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170 |
0 | 171 HttpClient::~HttpClient() |
172 { | |
173 curl_easy_cleanup(pimpl_->curl_); | |
174 curl_slist_free_all(pimpl_->postHeaders_); | |
175 } | |
176 | |
177 | |
178 void HttpClient::SetVerbose(bool isVerbose) | |
179 { | |
180 isVerbose_ = isVerbose; | |
181 | |
182 if (isVerbose_) | |
183 { | |
184 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 1)); | |
185 } | |
186 else | |
187 { | |
188 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 0)); | |
189 } | |
190 } | |
191 | |
192 | |
193 bool HttpClient::Apply(std::string& answer) | |
194 { | |
195 answer.clear(); | |
196 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_URL, url_.c_str())); | |
197 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEDATA, &answer)); | |
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198 |
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199 // Setup HTTPS-related options |
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200 #if ORTHANC_SSL_ENABLED == 1 |
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201 if (IsHttpsVerifyPeers()) |
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202 { |
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203 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CAINFO, GetHttpsCACertificates().c_str())); |
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204 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_SSL_VERIFYPEER, 1)); |
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205 } |
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206 else |
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207 { |
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208 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_SSL_VERIFYPEER, 0)); |
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209 } |
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210 #endif |
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211 |
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212 // Reset the parameters from previous calls to Apply() |
0 | 213 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, NULL)); |
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214 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPGET, 0L)); |
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215 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POST, 0L)); |
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216 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOBODY, 0L)); |
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217 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, NULL)); |
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218 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, NULL)); |
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219 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, 0)); |
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220 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PROXY, NULL)); |
0 | 221 |
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222 // Set timeouts |
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223 if (timeout_ <= 0) |
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224 { |
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225 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_TIMEOUT, 10)); /* default: 10 seconds */ |
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226 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CONNECTTIMEOUT, 10)); /* default: 10 seconds */ |
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227 } |
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228 else |
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229 { |
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230 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_TIMEOUT, timeout_)); |
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231 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CONNECTTIMEOUT, timeout_)); |
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232 } |
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233 |
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234 if (credentials_.size() != 0) |
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235 { |
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236 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_USERPWD, credentials_.c_str())); |
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237 } |
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238 |
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239 if (proxy_.size() != 0) |
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240 { |
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241 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PROXY, proxy_.c_str())); |
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242 } |
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243 |
0 | 244 switch (method_) |
245 { | |
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246 case HttpMethod_Get: |
0 | 247 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPGET, 1L)); |
248 break; | |
249 | |
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250 case HttpMethod_Post: |
0 | 251 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POST, 1L)); |
252 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, pimpl_->postHeaders_)); | |
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253 break; |
0 | 254 |
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255 case HttpMethod_Delete: |
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256 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOBODY, 1L)); |
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257 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, "DELETE")); |
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258 break; |
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259 |
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260 case HttpMethod_Put: |
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261 // http://stackoverflow.com/a/7570281/881731: Don't use |
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262 // CURLOPT_PUT if there is a body |
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263 |
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264 // CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PUT, 1L)); |
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265 |
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266 curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, "PUT"); /* !!! */ |
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267 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, pimpl_->postHeaders_)); |
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268 break; |
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269 |
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270 default: |
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271 throw OrthancException(ErrorCode_InternalError); |
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272 } |
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273 |
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274 |
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275 if (method_ == HttpMethod_Post || |
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276 method_ == HttpMethod_Put) |
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277 { |
0 | 278 if (postData_.size() > 0) |
279 { | |
280 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, postData_.c_str())); | |
281 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, postData_.size())); | |
282 } | |
283 else | |
284 { | |
285 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, NULL)); | |
286 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, 0)); | |
287 } | |
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288 } |
0 | 289 |
290 | |
291 // Do the actual request | |
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292 CURLcode code; |
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293 long status = 0; |
0 | 294 |
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295 if (boost::starts_with(url_, "https://")) |
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296 { |
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297 code = OrthancHttpClientPerformSSL(pimpl_->curl_, &status); |
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298 } |
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299 else |
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300 { |
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301 code = GetHttpStatus(curl_easy_perform(pimpl_->curl_), pimpl_->curl_, &status); |
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302 } |
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303 |
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304 CheckCode(code); |
0 | 305 |
306 if (status == 0) | |
307 { | |
308 // This corresponds to a call to an inexistent host | |
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309 lastStatus_ = HttpStatus_500_InternalServerError; |
0 | 310 } |
311 else | |
312 { | |
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313 lastStatus_ = static_cast<HttpStatus>(status); |
0 | 314 } |
315 | |
316 return (status >= 200 && status < 300); | |
317 } | |
318 | |
319 | |
320 bool HttpClient::Apply(Json::Value& answer) | |
321 { | |
322 std::string s; | |
323 if (Apply(s)) | |
324 { | |
325 Json::Reader reader; | |
326 return reader.parse(s, answer); | |
327 } | |
328 else | |
329 { | |
330 return false; | |
331 } | |
332 } | |
144
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333 |
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334 |
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335 void HttpClient::SetCredentials(const char* username, |
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336 const char* password) |
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337 { |
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338 credentials_ = std::string(username) + ":" + std::string(password); |
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339 } |
457 | 340 |
341 | |
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342 const std::string& HttpClient::GetHttpsCACertificates() const |
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343 { |
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344 if (caCertificates_.empty()) |
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345 { |
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346 return globalCACertificates_; |
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347 } |
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348 else |
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349 { |
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350 return caCertificates_; |
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351 } |
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352 } |
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353 |
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354 |
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355 void HttpClient::GlobalInitialize(bool httpsVerifyPeers, |
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356 const std::string& httpsVerifyCertificates) |
457 | 357 { |
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358 globalVerifyPeers_ = httpsVerifyPeers; |
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359 globalCACertificates_ = httpsVerifyCertificates; |
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360 |
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361 #if ORTHANC_SSL_ENABLED == 1 |
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362 if (httpsVerifyPeers) |
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363 { |
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364 if (globalCACertificates_.empty()) |
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365 { |
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366 LOG(WARNING) << "No certificates are provided to validate peers, " |
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367 << "set \"HttpsCACertificates\" if you need to do HTTPS requests"; |
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368 } |
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369 else |
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370 { |
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371 LOG(WARNING) << "HTTPS will use the CA certificates from this file: " << globalCACertificates_; |
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372 } |
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373 } |
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374 else |
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375 { |
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376 LOG(WARNING) << "The verification of the peers in HTTPS requests is disabled!"; |
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377 } |
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378 #endif |
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379 |
457 | 380 CheckCode(curl_global_init(CURL_GLOBAL_DEFAULT)); |
381 } | |
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382 |
457 | 383 |
384 void HttpClient::GlobalFinalize() | |
385 { | |
386 curl_global_cleanup(); | |
387 } | |
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388 |
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389 |
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390 void HttpClient::SetDefaultTimeout(long timeout) |
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391 { |
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392 LOG(INFO) << "Setting the default timeout for HTTP client connections: " << timeout << " seconds"; |
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393 globalTimeout_ = timeout; |
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394 } |
0 | 395 } |