Mercurial > hg > orthanc
annotate Core/HttpClient.cpp @ 1658:54bafe0e7e7b
Optional argument "keepStrings" in "DumpJson()"
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 30 Sep 2015 09:44:38 +0200 |
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children | b1291df2f780 |
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 | |
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87 static void ThrowException(HttpStatus status) |
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88 { |
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89 switch (status) |
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90 { |
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91 case HttpStatus_400_BadRequest: |
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92 throw OrthancException(ErrorCode_BadRequest); |
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93 |
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94 case HttpStatus_401_Unauthorized: |
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95 throw OrthancException(ErrorCode_Unauthorized); |
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96 |
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97 case HttpStatus_404_NotFound: |
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98 throw OrthancException(ErrorCode_InexistentItem); |
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99 |
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100 default: |
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101 throw OrthancException(ErrorCode_NetworkProtocol); |
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102 } |
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103 } |
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104 |
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105 |
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106 |
0 | 107 static CURLcode CheckCode(CURLcode code) |
108 { | |
109 if (code != CURLE_OK) | |
110 { | |
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111 LOG(ERROR) << "libCURL error: " + std::string(curl_easy_strerror(code)); |
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112 throw OrthancException(ErrorCode_NetworkProtocol); |
0 | 113 } |
114 | |
115 return code; | |
116 } | |
117 | |
118 | |
119 static size_t CurlCallback(void *buffer, size_t size, size_t nmemb, void *payload) | |
120 { | |
121 std::string& target = *(static_cast<std::string*>(payload)); | |
122 | |
123 size_t length = size * nmemb; | |
124 if (length == 0) | |
125 return 0; | |
126 | |
127 size_t pos = target.size(); | |
128 | |
129 target.resize(pos + length); | |
130 memcpy(&target.at(pos), buffer, length); | |
131 | |
132 return length; | |
133 } | |
134 | |
135 | |
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136 void HttpClient::Setup() |
0 | 137 { |
138 pimpl_->postHeaders_ = NULL; | |
139 if ((pimpl_->postHeaders_ = curl_slist_append(pimpl_->postHeaders_, "Expect:")) == NULL) | |
140 { | |
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141 throw OrthancException(ErrorCode_NotEnoughMemory); |
0 | 142 } |
143 | |
144 pimpl_->curl_ = curl_easy_init(); | |
145 if (!pimpl_->curl_) | |
146 { | |
147 curl_slist_free_all(pimpl_->postHeaders_); | |
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148 throw OrthancException(ErrorCode_NotEnoughMemory); |
0 | 149 } |
150 | |
151 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEFUNCTION, &CurlCallback)); | |
152 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HEADER, 0)); | |
153 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_FOLLOWLOCATION, 1)); | |
154 | |
456 | 155 // This fixes the "longjmp causes uninitialized stack frame" crash |
156 // that happens on modern Linux versions. | |
157 // http://stackoverflow.com/questions/9191668/error-longjmp-causes-uninitialized-stack-frame | |
158 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOSIGNAL, 1)); | |
159 | |
0 | 160 url_ = ""; |
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161 method_ = HttpMethod_Get; |
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162 lastStatus_ = HttpStatus_200_Ok; |
0 | 163 isVerbose_ = false; |
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164 timeout_ = globalTimeout_; |
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165 verifyPeers_ = globalVerifyPeers_; |
0 | 166 } |
167 | |
168 | |
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169 HttpClient::HttpClient() : pimpl_(new PImpl) |
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170 { |
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171 Setup(); |
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172 } |
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173 |
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174 |
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175 HttpClient::HttpClient(const HttpClient& other) : pimpl_(new PImpl) |
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176 { |
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177 Setup(); |
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178 |
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179 if (other.IsVerbose()) |
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180 { |
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181 SetVerbose(true); |
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182 } |
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183 |
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184 if (other.credentials_.size() != 0) |
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185 { |
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186 credentials_ = other.credentials_; |
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187 } |
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188 } |
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189 |
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190 |
0 | 191 HttpClient::~HttpClient() |
192 { | |
193 curl_easy_cleanup(pimpl_->curl_); | |
194 curl_slist_free_all(pimpl_->postHeaders_); | |
195 } | |
196 | |
197 | |
198 void HttpClient::SetVerbose(bool isVerbose) | |
199 { | |
200 isVerbose_ = isVerbose; | |
201 | |
202 if (isVerbose_) | |
203 { | |
204 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 1)); | |
205 } | |
206 else | |
207 { | |
208 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 0)); | |
209 } | |
210 } | |
211 | |
212 | |
213 bool HttpClient::Apply(std::string& answer) | |
214 { | |
215 answer.clear(); | |
216 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_URL, url_.c_str())); | |
217 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEDATA, &answer)); | |
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218 |
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219 // Setup HTTPS-related options |
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220 #if ORTHANC_SSL_ENABLED == 1 |
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221 if (IsHttpsVerifyPeers()) |
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222 { |
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223 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CAINFO, GetHttpsCACertificates().c_str())); |
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224 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_SSL_VERIFYPEER, 1)); |
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225 } |
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226 else |
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227 { |
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228 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_SSL_VERIFYPEER, 0)); |
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229 } |
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230 #endif |
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231 |
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232 // Reset the parameters from previous calls to Apply() |
0 | 233 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, NULL)); |
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234 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPGET, 0L)); |
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235 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POST, 0L)); |
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236 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOBODY, 0L)); |
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237 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, NULL)); |
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238 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, NULL)); |
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239 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, 0)); |
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240 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PROXY, NULL)); |
0 | 241 |
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242 // Set timeouts |
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243 if (timeout_ <= 0) |
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244 { |
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245 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_TIMEOUT, 10)); /* default: 10 seconds */ |
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246 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CONNECTTIMEOUT, 10)); /* default: 10 seconds */ |
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247 } |
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248 else |
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249 { |
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250 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_TIMEOUT, timeout_)); |
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251 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CONNECTTIMEOUT, timeout_)); |
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252 } |
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253 |
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254 if (credentials_.size() != 0) |
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255 { |
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256 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_USERPWD, credentials_.c_str())); |
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257 } |
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258 |
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259 if (proxy_.size() != 0) |
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260 { |
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261 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PROXY, proxy_.c_str())); |
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262 } |
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263 |
0 | 264 switch (method_) |
265 { | |
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266 case HttpMethod_Get: |
0 | 267 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPGET, 1L)); |
268 break; | |
269 | |
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270 case HttpMethod_Post: |
0 | 271 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POST, 1L)); |
272 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, pimpl_->postHeaders_)); | |
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273 break; |
0 | 274 |
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275 case HttpMethod_Delete: |
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276 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOBODY, 1L)); |
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277 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, "DELETE")); |
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278 break; |
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279 |
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280 case HttpMethod_Put: |
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281 // http://stackoverflow.com/a/7570281/881731: Don't use |
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282 // CURLOPT_PUT if there is a body |
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283 |
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284 // CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PUT, 1L)); |
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285 |
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286 curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, "PUT"); /* !!! */ |
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287 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, pimpl_->postHeaders_)); |
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288 break; |
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289 |
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290 default: |
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291 throw OrthancException(ErrorCode_InternalError); |
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292 } |
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293 |
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294 |
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295 if (method_ == HttpMethod_Post || |
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296 method_ == HttpMethod_Put) |
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297 { |
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298 if (body_.size() > 0) |
0 | 299 { |
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300 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, body_.c_str())); |
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301 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, body_.size())); |
0 | 302 } |
303 else | |
304 { | |
305 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, NULL)); | |
306 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, 0)); | |
307 } | |
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308 } |
0 | 309 |
310 | |
311 // Do the actual request | |
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312 CURLcode code; |
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313 long status = 0; |
0 | 314 |
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315 if (boost::starts_with(url_, "https://")) |
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316 { |
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317 code = OrthancHttpClientPerformSSL(pimpl_->curl_, &status); |
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318 } |
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319 else |
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320 { |
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321 code = GetHttpStatus(curl_easy_perform(pimpl_->curl_), pimpl_->curl_, &status); |
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322 } |
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323 |
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324 CheckCode(code); |
0 | 325 |
326 if (status == 0) | |
327 { | |
328 // This corresponds to a call to an inexistent host | |
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329 lastStatus_ = HttpStatus_500_InternalServerError; |
0 | 330 } |
331 else | |
332 { | |
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333 lastStatus_ = static_cast<HttpStatus>(status); |
0 | 334 } |
335 | |
336 return (status >= 200 && status < 300); | |
337 } | |
338 | |
339 | |
340 bool HttpClient::Apply(Json::Value& answer) | |
341 { | |
342 std::string s; | |
343 if (Apply(s)) | |
344 { | |
345 Json::Reader reader; | |
346 return reader.parse(s, answer); | |
347 } | |
348 else | |
349 { | |
350 return false; | |
351 } | |
352 } | |
144
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353 |
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354 |
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355 void HttpClient::SetCredentials(const char* username, |
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356 const char* password) |
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357 { |
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358 credentials_ = std::string(username) + ":" + std::string(password); |
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359 } |
457 | 360 |
361 | |
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362 const std::string& HttpClient::GetHttpsCACertificates() const |
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363 { |
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364 if (caCertificates_.empty()) |
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365 { |
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366 return globalCACertificates_; |
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367 } |
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368 else |
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369 { |
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370 return caCertificates_; |
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371 } |
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372 } |
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373 |
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374 |
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375 void HttpClient::GlobalInitialize(bool httpsVerifyPeers, |
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376 const std::string& httpsVerifyCertificates) |
457 | 377 { |
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378 globalVerifyPeers_ = httpsVerifyPeers; |
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379 globalCACertificates_ = httpsVerifyCertificates; |
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380 |
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381 #if ORTHANC_SSL_ENABLED == 1 |
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382 if (httpsVerifyPeers) |
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383 { |
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384 if (globalCACertificates_.empty()) |
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385 { |
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386 LOG(WARNING) << "No certificates are provided to validate peers, " |
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387 << "set \"HttpsCACertificates\" if you need to do HTTPS requests"; |
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388 } |
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389 else |
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390 { |
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391 LOG(WARNING) << "HTTPS will use the CA certificates from this file: " << globalCACertificates_; |
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392 } |
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393 } |
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394 else |
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395 { |
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396 LOG(WARNING) << "The verification of the peers in HTTPS requests is disabled!"; |
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397 } |
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398 #endif |
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399 |
457 | 400 CheckCode(curl_global_init(CURL_GLOBAL_DEFAULT)); |
401 } | |
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402 |
457 | 403 |
404 void HttpClient::GlobalFinalize() | |
405 { | |
406 curl_global_cleanup(); | |
407 } | |
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408 |
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409 |
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410 void HttpClient::SetDefaultTimeout(long timeout) |
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411 { |
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412 LOG(INFO) << "Setting the default timeout for HTTP client connections: " << timeout << " seconds"; |
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413 globalTimeout_ = timeout; |
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414 } |
1606
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415 |
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416 |
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417 void HttpClient::ApplyAndThrowException(std::string& answer) |
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418 { |
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419 if (!Apply(answer)) |
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420 { |
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421 ThrowException(GetLastStatus()); |
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422 } |
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423 } |
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424 |
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425 void HttpClient::ApplyAndThrowException(Json::Value& answer) |
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426 { |
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427 if (!Apply(answer)) |
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428 { |
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429 ThrowException(GetLastStatus()); |
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430 } |
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431 } |
0 | 432 } |