Mercurial > hg > orthanc
annotate Core/HttpServer/HttpOutput.cpp @ 1511:7962563129c9
starting support of deflate/gzip content types
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 10 Aug 2015 14:18:24 +0200 |
parents | f967bdf8534e |
children | d73a2178b319 |
rev | line source |
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0 | 1 /** |
59 | 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 * |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU General Public License as | |
8 * published by the Free Software Foundation, either version 3 of the | |
9 * License, or (at your option) any later version. | |
136 | 10 * |
11 * In addition, as a special exception, the copyright holders of this | |
12 * program give permission to link the code of its release with the | |
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
14 * that use the same license as the "OpenSSL" library), and distribute | |
15 * the linked executables. You must obey the GNU General Public License | |
16 * in all respects for all of the code used other than "OpenSSL". If you | |
17 * modify file(s) with this exception, you may extend this exception to | |
18 * your version of the file(s), but you are not obligated to do so. If | |
19 * you do not wish to do so, delete this exception statement from your | |
20 * version. If you delete this exception statement from all source files | |
21 * in the program, then also delete it here. | |
0 | 22 * |
23 * This program is distributed in the hope that it will be useful, but | |
24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 * General Public License for more details. | |
27 * | |
28 * You should have received a copy of the GNU General Public License | |
29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
30 **/ | |
31 | |
32 | |
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33 #include "../PrecompiledHeaders.h" |
0 | 34 #include "HttpOutput.h" |
35 | |
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36 #include "../Logging.h" |
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37 #include "../OrthancException.h" |
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38 #include "../Toolbox.h" |
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39 #include "../Compression/ZlibCompressor.h" |
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40 |
324 | 41 #include <iostream> |
0 | 42 #include <vector> |
43 #include <stdio.h> | |
44 #include <boost/lexical_cast.hpp> | |
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45 |
0 | 46 |
59 | 47 namespace Orthanc |
0 | 48 { |
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49 HttpOutput::StateMachine::StateMachine(IHttpOutputStream& stream, |
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50 bool isKeepAlive) : |
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51 stream_(stream), |
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52 state_(State_WritingHeader), |
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53 status_(HttpStatus_200_Ok), |
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54 hasContentLength_(false), |
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55 contentPosition_(0), |
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56 keepAlive_(isKeepAlive) |
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57 { |
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58 } |
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59 |
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60 HttpOutput::StateMachine::~StateMachine() |
910 | 61 { |
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62 if (state_ != State_Done) |
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63 { |
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64 //asm volatile ("int3;"); |
1200 | 65 //LOG(ERROR) << "This HTTP answer does not contain any body"; |
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66 } |
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67 |
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68 if (hasContentLength_ && contentPosition_ != contentLength_) |
910 | 69 { |
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70 LOG(ERROR) << "This HTTP answer has not sent the proper number of bytes in its body"; |
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71 } |
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72 } |
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73 |
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74 |
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75 void HttpOutput::StateMachine::SetHttpStatus(HttpStatus status) |
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76 { |
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77 if (state_ != State_WritingHeader) |
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78 { |
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79 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
910 | 80 } |
81 | |
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82 status_ = status; |
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83 } |
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84 |
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85 |
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86 void HttpOutput::StateMachine::SetContentLength(uint64_t length) |
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87 { |
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88 if (state_ != State_WritingHeader) |
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89 { |
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90 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
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91 } |
910 | 92 |
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93 hasContentLength_ = true; |
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94 contentLength_ = length; |
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95 } |
910 | 96 |
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97 void HttpOutput::StateMachine::SetContentType(const char* contentType) |
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98 { |
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99 AddHeader("Content-Type", contentType); |
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100 } |
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101 |
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102 void HttpOutput::StateMachine::SetContentFilename(const char* filename) |
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103 { |
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104 // TODO Escape double quotes |
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105 AddHeader("Content-Disposition", "filename=\"" + std::string(filename) + "\""); |
910 | 106 } |
107 | |
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108 void HttpOutput::StateMachine::SetCookie(const std::string& cookie, |
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109 const std::string& value) |
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110 { |
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111 if (state_ != State_WritingHeader) |
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112 { |
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113 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
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114 } |
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115 |
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116 // TODO Escape "=" characters |
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117 AddHeader("Set-Cookie", cookie + "=" + value); |
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118 } |
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119 |
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120 |
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121 void HttpOutput::StateMachine::AddHeader(const std::string& header, |
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122 const std::string& value) |
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123 { |
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124 if (state_ != State_WritingHeader) |
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125 { |
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126 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
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127 } |
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128 |
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129 headers_.push_back(header + ": " + value + "\r\n"); |
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130 } |
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131 |
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132 void HttpOutput::StateMachine::ClearHeaders() |
910 | 133 { |
134 if (state_ != State_WritingHeader) | |
135 { | |
136 throw OrthancException(ErrorCode_BadSequenceOfCalls); | |
137 } | |
138 | |
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139 headers_.clear(); |
910 | 140 } |
141 | |
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142 void HttpOutput::StateMachine::SendBody(const void* buffer, size_t length) |
910 | 143 { |
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144 if (state_ == State_Done) |
910 | 145 { |
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146 if (length == 0) |
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147 { |
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148 return; |
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149 } |
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150 else |
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151 { |
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152 LOG(ERROR) << "Because of keep-alive connections, the entire body must be sent at once or Content-Length must be given"; |
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153 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
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154 } |
910 | 155 } |
156 | |
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157 if (state_ == State_WritingMultipart) |
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158 { |
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159 throw OrthancException(ErrorCode_InternalError); |
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160 } |
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161 |
910 | 162 if (state_ == State_WritingHeader) |
163 { | |
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164 // Send the HTTP header before writing the body |
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165 |
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166 stream_.OnHttpStatusReceived(status_); |
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167 |
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168 std::string s = "HTTP/1.1 " + |
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169 boost::lexical_cast<std::string>(status_) + |
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170 " " + std::string(EnumerationToString(status_)) + |
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171 "\r\n"; |
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172 |
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173 if (keepAlive_) |
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174 { |
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175 s += "Connection: keep-alive\r\n"; |
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176 } |
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177 |
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178 for (std::list<std::string>::const_iterator |
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179 it = headers_.begin(); it != headers_.end(); ++it) |
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180 { |
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181 s += *it; |
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182 } |
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183 |
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184 if (status_ != HttpStatus_200_Ok) |
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185 { |
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186 hasContentLength_ = false; |
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187 } |
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188 |
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189 uint64_t contentLength = (hasContentLength_ ? contentLength_ : length); |
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190 s += "Content-Length: " + boost::lexical_cast<std::string>(contentLength) + "\r\n\r\n"; |
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191 |
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192 stream_.Send(true, s.c_str(), s.size()); |
910 | 193 state_ = State_WritingBody; |
194 } | |
195 | |
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196 if (hasContentLength_ && |
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197 contentPosition_ + length > contentLength_) |
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198 { |
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199 LOG(ERROR) << "The body size exceeds what was declared with SetContentSize()"; |
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200 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
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201 } |
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202 |
910 | 203 if (length > 0) |
204 { | |
911 | 205 stream_.Send(false, buffer, length); |
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206 contentPosition_ += length; |
330 | 207 } |
208 | |
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209 if (!hasContentLength_ || |
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210 contentPosition_ == contentLength_) |
330 | 211 { |
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212 state_ = State_Done; |
330 | 213 } |
214 } | |
215 | |
207 | 216 |
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217 void HttpOutput::SendMethodNotAllowed(const std::string& allowed) |
0 | 218 { |
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219 stateMachine_.ClearHeaders(); |
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220 stateMachine_.SetHttpStatus(HttpStatus_405_MethodNotAllowed); |
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221 stateMachine_.AddHeader("Allow", allowed); |
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222 stateMachine_.SendBody(NULL, 0); |
0 | 223 } |
224 | |
225 | |
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226 void HttpOutput::SendStatus(HttpStatus status) |
0 | 227 { |
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228 if (status == HttpStatus_200_Ok || |
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229 status == HttpStatus_301_MovedPermanently || |
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230 status == HttpStatus_401_Unauthorized || |
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231 status == HttpStatus_405_MethodNotAllowed) |
0 | 232 { |
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233 LOG(ERROR) << "Please use the dedicated methods to this HTTP status code in HttpOutput"; |
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234 throw OrthancException(ErrorCode_ParameterOutOfRange); |
0 | 235 } |
236 | |
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237 stateMachine_.ClearHeaders(); |
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238 stateMachine_.SetHttpStatus(status); |
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239 stateMachine_.SendBody(NULL, 0); |
339 | 240 } |
241 | |
242 | |
0 | 243 void HttpOutput::Redirect(const std::string& path) |
244 { | |
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245 stateMachine_.ClearHeaders(); |
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246 stateMachine_.SetHttpStatus(HttpStatus_301_MovedPermanently); |
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247 stateMachine_.AddHeader("Location", path); |
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248 stateMachine_.SendBody(NULL, 0); |
0 | 249 } |
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250 |
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251 |
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252 void HttpOutput::SendUnauthorized(const std::string& realm) |
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253 { |
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254 stateMachine_.ClearHeaders(); |
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255 stateMachine_.SetHttpStatus(HttpStatus_401_Unauthorized); |
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256 stateMachine_.AddHeader("WWW-Authenticate", "Basic realm=\"" + realm + "\""); |
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257 stateMachine_.SendBody(NULL, 0); |
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258 } |
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259 |
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260 void HttpOutput::SendBody(const void* buffer, |
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261 size_t length, |
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262 HttpCompression compression) |
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263 { |
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264 if (length == 0) |
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265 { |
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266 stateMachine_.SendBody(NULL, 0); |
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267 } |
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268 else |
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269 { |
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270 switch (compression) |
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271 { |
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272 case HttpCompression_None: |
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273 { |
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274 stateMachine_.SendBody(buffer, length); |
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275 break; |
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276 } |
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277 |
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278 case HttpCompression_Deflate: |
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279 { |
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280 LOG(TRACE) << "Compressing a HTTP answer using Deflate"; |
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281 ZlibCompressor compressor; |
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282 |
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283 // Do not prefix the buffer with its uncompressed size, to be compatible with "deflate" |
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284 compressor.SetPrefixWithUncompressedSize(false); |
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285 |
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286 std::string compressed; |
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287 compressor.Compress(compressed, buffer, length); |
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288 |
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289 // The body is empty, do not use Deflate compression |
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290 if (compressed.size() == 0) |
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291 { |
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292 stateMachine_.SendBody(NULL, 0); |
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293 } |
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294 else |
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295 { |
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296 stateMachine_.AddHeader("Content-Encoding", "deflate"); |
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297 stateMachine_.SendBody(compressed.c_str(), compressed.size()); |
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298 } |
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299 |
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300 break; |
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301 } |
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302 |
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303 default: |
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304 throw OrthancException(ErrorCode_NotImplemented); |
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305 } |
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306 } |
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307 } |
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308 |
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309 void HttpOutput::SendBody(const std::string& str, |
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310 HttpCompression compression) |
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311 { |
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312 SendBody(str.size() == 0 ? NULL : str.c_str(), str.size(), compression); |
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313 } |
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314 |
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315 void HttpOutput::SendBody() |
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316 { |
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317 stateMachine_.SendBody(NULL, 0); |
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318 } |
1430
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319 |
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320 |
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321 void HttpOutput::StateMachine::StartMultipart(const std::string& subType, |
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322 const std::string& contentType) |
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323 { |
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324 if (subType != "mixed" && |
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325 subType != "related") |
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326 { |
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327 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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328 } |
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329 |
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330 if (keepAlive_) |
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331 { |
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332 LOG(ERROR) << "Multipart answers are not implemented together with keep-alive connections"; |
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333 throw OrthancException(ErrorCode_NotImplemented); |
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334 } |
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335 |
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336 if (state_ != State_WritingHeader) |
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337 { |
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338 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
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339 } |
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340 |
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341 if (status_ != HttpStatus_200_Ok) |
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342 { |
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343 SendBody(NULL, 0); |
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344 return; |
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345 } |
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346 |
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347 stream_.OnHttpStatusReceived(status_); |
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348 |
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349 std::string header = "HTTP/1.1 200 OK\r\n"; |
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350 |
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351 // Possibly add the cookies |
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352 for (std::list<std::string>::const_iterator |
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353 it = headers_.begin(); it != headers_.end(); ++it) |
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354 { |
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355 if (!Toolbox::StartsWith(*it, "Set-Cookie: ")) |
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356 { |
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357 LOG(ERROR) << "The only headers that can be set in multipart answers are Set-Cookie (here: " << *it << " is set)"; |
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358 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
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359 } |
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360 |
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361 header += *it; |
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362 } |
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363 |
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364 multipartBoundary_ = Toolbox::GenerateUuid(); |
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365 multipartContentType_ = contentType; |
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366 header += "Content-Type: multipart/related; type=multipart/" + subType + "; boundary=" + multipartBoundary_ + "\r\n\r\n"; |
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367 |
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368 stream_.Send(true, header.c_str(), header.size()); |
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369 state_ = State_WritingMultipart; |
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370 } |
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371 |
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372 |
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373 void HttpOutput::StateMachine::SendMultipartItem(const void* item, size_t length) |
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374 { |
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375 std::string header = "--" + multipartBoundary_ + "\n"; |
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376 header += "Content-Type: " + multipartContentType_ + "\n"; |
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377 header += "Content-Length: " + boost::lexical_cast<std::string>(length) + "\n"; |
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378 header += "MIME-Version: 1.0\n\n"; |
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379 |
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380 stream_.Send(false, header.c_str(), header.size()); |
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381 |
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382 if (length > 0) |
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383 { |
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384 stream_.Send(false, item, length); |
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385 } |
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386 |
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387 stream_.Send(false, "\n", 1); |
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388 } |
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389 |
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390 |
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391 void HttpOutput::StateMachine::CloseMultipart() |
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392 { |
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393 if (state_ != State_WritingMultipart) |
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394 { |
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395 throw OrthancException(ErrorCode_BadSequenceOfCalls); |
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396 } |
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397 |
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398 // The two lines below might throw an exception, if the client has |
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399 // closed the connection. Such an error is ignored. |
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400 try |
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401 { |
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402 std::string header = "--" + multipartBoundary_ + "--\n"; |
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403 stream_.Send(false, header.c_str(), header.size()); |
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404 } |
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405 catch (OrthancException&) |
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406 { |
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407 } |
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408 |
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409 state_ = State_Done; |
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410 } |
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411 |
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412 |
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413 void HttpOutput::SendMultipartItem(const std::string& item) |
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414 { |
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415 if (item.size() > 0) |
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416 { |
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417 stateMachine_.SendMultipartItem(item.c_str(), item.size()); |
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418 } |
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419 else |
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420 { |
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421 stateMachine_.SendMultipartItem(NULL, 0); |
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422 } |
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423 } |
0 | 424 } |