2 * Copyright 2001-2007 Internet2
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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8 * http://www.apache.org/licenses/LICENSE-2.0
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10 * Unless required by applicable law or agreed to in writing, software
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11 * distributed under the License is distributed on an "AS IS" BASIS,
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 * See the License for the specific language governing permissions and
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14 * limitations under the License.
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17 /* shibresponder.cpp - Shibboleth FastCGI Responder/Handler
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23 #include "config_win32.h"
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25 #define _CRT_NONSTDC_NO_DEPRECATE 1
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26 #define _CRT_SECURE_NO_DEPRECATE 1
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27 #define _SCL_SECURE_NO_WARNINGS 1
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29 #include <shibsp/AbstractSPRequest.h>
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30 #include <shibsp/SPConfig.h>
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31 #include <shibsp/ServiceProvider.h>
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32 #include <xmltooling/unicode.h>
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33 #include <xmltooling/XMLToolingConfig.h>
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34 #include <xmltooling/util/NDC.h>
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35 #include <xmltooling/util/XMLConstants.h>
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36 #include <xmltooling/util/XMLHelper.h>
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37 #include <xercesc/util/XMLUniDefs.hpp>
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39 #include <stdexcept>
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41 #ifdef HAVE_UNISTD_H
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42 # include <unistd.h>
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43 # include <sys/mman.h>
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47 using namespace shibsp;
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48 using namespace xmltooling;
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49 using namespace xercesc;
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50 using namespace std;
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52 static const XMLCh path[] = UNICODE_LITERAL_4(p,a,t,h);
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53 static const XMLCh validate[] = UNICODE_LITERAL_8(v,a,l,i,d,a,t,e);
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61 class ShibTargetFCGI : public AbstractSPRequest
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63 FCGX_Request* m_req;
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65 multimap<string,string> m_headers;
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67 string m_scheme,m_hostname;
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70 ShibTargetFCGI(FCGX_Request* req, char* post_data, const char* scheme=NULL, const char* hostname=NULL, int port=0)
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71 : AbstractSPRequest(SHIBSP_LOGCAT".FastCGI"), m_req(req), m_body(post_data) {
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73 const char* server_name_str = hostname;
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74 if (!server_name_str || !*server_name_str)
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75 server_name_str = FCGX_GetParam("SERVER_NAME", req->envp);
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76 m_hostname = server_name_str;
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80 char* server_port_str = FCGX_GetParam("SERVER_PORT", req->envp);
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81 m_port = strtol(server_port_str, &server_port_str, 10);
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82 if (*server_port_str) {
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83 cerr << "can't parse SERVER_PORT (" << FCGX_GetParam("SERVER_PORT", req->envp) << ")" << endl;
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84 throw runtime_error("Unable to determine server port.");
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88 const char* server_scheme_str = scheme;
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89 if (!server_scheme_str || !*server_scheme_str)
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90 server_scheme_str = (m_port == 443 || m_port == 8443) ? "https" : "http";
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91 m_scheme = server_scheme_str;
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93 setRequestURI(FCGX_GetParam("REQUEST_URI", m_req->envp));
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96 ~ShibTargetFCGI() { }
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98 const char* getScheme() const {
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99 return m_scheme.c_str();
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101 const char* getHostname() const {
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102 return m_hostname.c_str();
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104 int getPort() const {
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107 const char* getMethod() const {
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108 return FCGX_GetParam("REQUEST_METHOD", m_req->envp);
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110 string getContentType() const {
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111 const char* s = FCGX_GetParam("CONTENT_TYPE", m_req->envp);
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114 long getContentLength() const {
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115 const char* s = FCGX_GetParam("CONTENT_LENGTH", m_req->envp);
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116 return s ? atol(s) : 0;
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118 string getRemoteUser() const {
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119 const char* s = FCGX_GetParam("REMOTE_USER", m_req->envp);
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122 string getRemoteAddr() const {
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123 const char* s = FCGX_GetParam("REMOTE_ADDR", m_req->envp);
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126 void log(SPLogLevel level, const string& msg) const {
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127 AbstractSPRequest::log(level,msg);
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128 if (level >= SPError)
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129 cerr << "shib: " << msg;
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132 string getHeader(const char* name) const {
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133 string hdr("HTTP_");
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134 for (; *name; ++name) {
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138 hdr += toupper(*name);
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140 char* s = FCGX_GetParam(hdr.c_str(), m_req->envp);
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144 void setResponseHeader(const char* name, const char* value) {
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147 m_headers.insert(make_pair(name,value));
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149 m_headers.erase(name);
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152 const char* getQueryString() const {
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153 return FCGX_GetParam("QUERY_STRING", m_req->envp);
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156 const char* getRequestBody() const {
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160 long sendResponse(istream& in, long status) {
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161 string hdr = string("Connection: close\r\n");
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162 for (multimap<string,string>::const_iterator i=m_headers.begin(); i!=m_headers.end(); ++i)
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163 hdr += i->first + ": " + i->second + "\r\n";
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165 const char* codestr="Status: 200 OK";
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167 case XMLTOOLING_HTTP_STATUS_ERROR: codestr="Status: 500 Server Error"; break;
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168 case XMLTOOLING_HTTP_STATUS_UNAUTHORIZED: codestr="Status: 401 Authorization Required"; break;
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169 case XMLTOOLING_HTTP_STATUS_FORBIDDEN: codestr="Status: 403 Forbidden"; break;
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170 case XMLTOOLING_HTTP_STATUS_NOTFOUND: codestr="Status: 404 Not Found"; break;
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172 cout << codestr << "\r\n" << hdr << "\r\n";
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176 cout.write(buf, in.gcount());
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178 return SHIB_RETURN_DONE;
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181 long sendRedirect(const char* url) {
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182 string hdr=string("Status: 302 Please Wait\r\nLocation: ") + url + "\r\n"
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183 "Content-Type: text/html\r\n"
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184 "Content-Length: 40\r\n"
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185 "Expires: 01-Jan-1997 12:00:00 GMT\r\n"
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186 "Cache-Control: private,no-store,no-cache\r\n";
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187 for (multimap<string,string>::const_iterator i=m_headers.begin(); i!=m_headers.end(); ++i)
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188 hdr += i->first + ": " + i->second + "\r\n";
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191 cout << hdr << "<HTML><BODY>Redirecting...</BODY></HTML>";
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192 return SHIB_RETURN_DONE;
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195 long returnDecline() {
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196 return SHIB_RETURN_KO;
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199 return SHIB_RETURN_OK;
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202 const vector<string>& getClientCertificates() const {
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203 static vector<string> g_NoCerts;
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207 // Not used in the extension.
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209 virtual void clearHeader(const char* rawname, const char* cginame) {
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210 throw runtime_error("clearHeader not implemented by FastCGI responder.");
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213 virtual void setHeader(const char* name, const char* value) {
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214 throw runtime_error("setHeader not implemented by FastCGI responder.");
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217 virtual void setRemoteUser(const char* user) {
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218 throw runtime_error("setRemoteUser not implemented by FastCGI responder.");
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222 // Maximum number of bytes allowed to be read from stdin
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223 static const unsigned long STDIN_MAX = 1000000;
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225 static long gstdin(FCGX_Request* request, char** content)
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227 char* clenstr = FCGX_GetParam("CONTENT_LENGTH", request->envp);
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228 unsigned long clen = STDIN_MAX;
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231 clen = strtol(clenstr, &clenstr, 10);
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233 cerr << "can't parse CONTENT_LENGTH (" << FCGX_GetParam("CONTENT_LENGTH", request->envp) << ")" << endl;
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237 // *always* put a cap on the amount of data that will be read
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238 if (clen > STDIN_MAX)
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241 *content = new char[clen];
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243 cin.read(*content, clen);
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244 clen = cin.gcount();
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247 // *never* read stdin when CONTENT_LENGTH is missing or unparsable
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252 // Chew up any remaining stdin - this shouldn't be necessary
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253 // but is because mod_fastcgi doesn't handle it correctly.
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255 // ignore() doesn't set the eof bit in some versions of glibc++
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256 // so use gcount() instead of eof()...
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257 do cin.ignore(1024); while (cin.gcount() == 1024);
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262 static void print_ok() {
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263 cout << "Status: 200 OK" << "\r\n\r\n";
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266 static void print_error(const char* msg) {
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267 cout << "Status: 500 Server Error" << "\r\n\r\n" << msg;
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272 SPConfig* g_Config=&SPConfig::getConfig();
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273 g_Config->setFeatures(
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274 SPConfig::Listener |
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275 SPConfig::Caching |
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276 SPConfig::RequestMapping |
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277 SPConfig::InProcess |
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278 SPConfig::Logging |
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281 if (!g_Config->init()) {
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282 cerr << "failed to initialize Shibboleth libraries" << endl;
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287 if (!g_Config->instantiate(NULL, true))
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288 throw exception("unknown error");
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290 catch (exception& ex) {
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292 cerr << "exception while initializing Shibboleth configuration: " << ex.what() << endl;
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296 string g_ServerScheme;
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297 string g_ServerName;
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298 int g_ServerPort=0;
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300 // Load "authoritative" URL fields.
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301 char* var = getenv("SHIBSP_SERVER_NAME");
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303 g_ServerName = var;
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304 var = getenv("SHIBSP_SERVER_SCHEME");
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306 g_ServerScheme = var;
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307 var = getenv("SHIBSP_SERVER_PORT");
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309 g_ServerPort = atoi(var);
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311 streambuf* cin_streambuf = cin.rdbuf();
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312 streambuf* cout_streambuf = cout.rdbuf();
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313 streambuf* cerr_streambuf = cerr.rdbuf();
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315 FCGX_Request request;
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318 FCGX_InitRequest(&request, 0, 0);
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320 cout << "Shibboleth initialization complete. Starting request loop." << endl;
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321 while (FCGX_Accept_r(&request) == 0) {
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322 // Note that the default bufsize (0) will cause the use of iostream
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323 // methods that require positioning (such as peek(), seek(),
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324 // unget() and putback()) to fail (in favour of more efficient IO).
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325 fcgi_streambuf cin_fcgi_streambuf(request.in);
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326 fcgi_streambuf cout_fcgi_streambuf(request.out);
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327 fcgi_streambuf cerr_fcgi_streambuf(request.err);
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329 cin.rdbuf(&cin_fcgi_streambuf);
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330 cout.rdbuf(&cout_fcgi_streambuf);
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331 cerr.rdbuf(&cerr_fcgi_streambuf);
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333 // Although FastCGI supports writing before reading,
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334 // many http clients (browsers) don't support it (so
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335 // the connection deadlocks until a timeout expires!).
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337 gstdin(&request, &content);
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340 xmltooling::NDC ndc("FastCGI shibresponder");
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341 ShibTargetFCGI stf(&request, content, g_ServerScheme.c_str(), g_ServerName.c_str(), g_ServerPort);
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343 pair<bool,long> res = stf.getServiceProvider().doHandler(stf);
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346 cerr << "shib: doHandler handled the request" << endl;
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348 switch(res.second) {
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349 case SHIB_RETURN_OK:
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353 case SHIB_RETURN_KO:
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354 cerr << "shib: doHandler failed to handle the request" << endl;
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355 print_error("<html><body>FastCGI Shibboleth responder should only be used for Shibboleth protocol requests.</body></html>");
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358 case SHIB_RETURN_DONE:
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359 // response already handled
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363 cerr << "shib: doHandler returned an unexpected result: " << res.second << endl;
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364 print_error("<html><body>FastCGI Shibboleth responder returned an unexpected result.</body></html>");
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369 cerr << "shib: doHandler failed to handle request." << endl;
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370 print_error("<html><body>FastCGI Shibboleth responder failed to process request.</body></html>");
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374 catch (exception& e) {
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375 cerr << "shib: FastCGI responder caught an exception: " << e.what() << endl;
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376 print_error("<html><body>FastCGI Shibboleth responder caught an exception, check log for details.</body></html>");
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381 // If the output streambufs had non-zero bufsizes and
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382 // were constructed outside of the accept loop (i.e.
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383 // their destructor won't be called here), they would
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384 // have to be flushed here.
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387 cout << "Request loop ended." << endl;
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389 cin.rdbuf(cin_streambuf);
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390 cout.rdbuf(cout_streambuf);
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391 cerr.rdbuf(cerr_streambuf);
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