shibsp/ServiceProvider.cpp

   1 /*
   2  *  Copyright 2001-2010 Internet2
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /**
  18  * ServiceProvider.cpp
  19  *
  20  * Interface to a Shibboleth ServiceProvider instance.
  21  */
  22
  23 #include "internal.h"
  24 #include "exceptions.h"
  25 #include "AccessControl.h"
  26 #include "Application.h"
  27 #include "ServiceProvider.h"
  28 #include "SessionCache.h"
  29 #include "SPRequest.h"
  30 #include "attribute/Attribute.h"
  31 #include "handler/SessionInitiator.h"
  32 #include "util/TemplateParameters.h"
  33
  34 #include <fstream>
  35 #include <sstream>
  36 #ifndef SHIBSP_LITE
  37 # include <saml/exceptions.h>
  38 # include <saml/saml2/metadata/MetadataProvider.h>
  39 #endif
  40 #include <xmltooling/XMLToolingConfig.h>
  41 #include <xmltooling/util/NDC.h>
  42 #include <xmltooling/util/PathResolver.h>
  43 #include <xmltooling/util/URLEncoder.h>
  44 #include <xmltooling/util/XMLHelper.h>
  45
  46 using namespace shibsp;
  47 using namespace xmltooling::logging;
  48 using namespace xmltooling;
  49 using namespace std;
  50
  51 namespace shibsp {
  52     SHIBSP_DLLLOCAL PluginManager<ServiceProvider,string,const DOMElement*>::Factory XMLServiceProviderFactory;
  53
  54     long SHIBSP_DLLLOCAL sendError(
  55         Category& log, SPRequest& request, const Application* app, const char* page, TemplateParameters& tp, bool mayRedirect=true
  56         )
  57     {
  58         // The properties we need can be set in the RequestMap, or the Errors element.
  59         bool mderror = dynamic_cast<const opensaml::saml2md::MetadataException*>(tp.getRichException())!=nullptr;
  60         bool accesserror = (strcmp(page, "access")==0);
  61         pair<bool,const char*> redirectErrors = pair<bool,const char*>(false,nullptr);
  62         pair<bool,const char*> pathname = pair<bool,const char*>(false,nullptr);
  63
  64         // Strictly for error handling, detect a nullptr application and point at the default.
  65         if (!app)
  66             app = request.getServiceProvider().getApplication(nullptr);
  67
  68         const PropertySet* props=app->getPropertySet("Errors");
  69
  70         // First look for settings in the request map of the form pageError.
  71         try {
  72             RequestMapper::Settings settings = request.getRequestSettings();
  73             if (mderror)
  74                 pathname = settings.first->getString("metadataError");
  75             if (!pathname.first) {
  76                 string pagename(page);
  77                 pagename += "Error";
  78                 pathname = settings.first->getString(pagename.c_str());
  79             }
  80             if (mayRedirect)
  81                 redirectErrors = settings.first->getString("redirectErrors");
  82         }
  83         catch (exception& ex) {
  84             log.error(ex.what());
  85         }
  86
  87         // Check for redirection on errors instead of template.
  88         if (mayRedirect) {
  89             if (!redirectErrors.first && props)
  90                 redirectErrors = props->getString("redirectErrors");
  91             if (redirectErrors.first) {
  92                 string loc(redirectErrors.second);
  93                 loc = loc + '?' + tp.toQueryString();
  94                 return request.sendRedirect(loc.c_str());
  95             }
  96         }
  97
  98         request.setContentType("text/html");
  99         request.setResponseHeader("Expires","01-Jan-1997 12:00:00 GMT");
 100         request.setResponseHeader("Cache-Control","private,no-store,no-cache");
 101
 102         // Nothing in the request map, so check for a property named "page" in the Errors property set.
 103         if (!pathname.first && props) {
 104             if (mderror)
 105                 pathname=props->getString("metadata");
 106             if (!pathname.first)
 107                 pathname=props->getString(page);
 108         }
 109
 110         // If there's still no template to use, just use pageError.html unless it's an access issue.
 111         string fname;
 112         if (!pathname.first) {
 113             if (!accesserror) {
 114                 fname = string(page) + "Error.html";
 115                 pathname.second = fname.c_str();
 116             }
 117         }
 118         else {
 119             fname = pathname.second;
 120         }
 121
 122         // If we have a template to use, use it.
 123         if (!fname.empty()) {
 124             ifstream infile(XMLToolingConfig::getConfig().getPathResolver()->resolve(fname, PathResolver::XMLTOOLING_CFG_FILE).c_str());
 125             if (infile) {
 126                 tp.setPropertySet(props);
 127                 stringstream str;
 128                 XMLToolingConfig::getConfig().getTemplateEngine()->run(infile, str, tp, tp.getRichException());
 129                 return request.sendError(str);
 130             }
 131         }
 132
 133         // If we got here, then either it's an access error or a template failed.
 134         if (accesserror) {
 135             istringstream msg("Access Denied");
 136             return request.sendResponse(msg, HTTPResponse::XMLTOOLING_HTTP_STATUS_FORBIDDEN);
 137         }
 138
 139         log.error("sendError could not process error template (%s)", pathname.second);
 140         istringstream msg("Internal Server Error. Please contact the site administrator.");
 141         return request.sendError(msg);
 142     }
 143
 144     void SHIBSP_DLLLOCAL clearHeaders(SPRequest& request) {
 145         const Application& app = request.getApplication();
 146         app.clearHeader(request, "Shib-Session-ID", "HTTP_SHIB_SESSION_ID");
 147         app.clearHeader(request, "Shib-Session-Index", "HTTP_SHIB_SESSION_INDEX");
 148         app.clearHeader(request, "Shib-Identity-Provider", "HTTP_SHIB_IDENTITY_PROVIDER");
 149         app.clearHeader(request, "Shib-Authentication-Method", "HTTP_SHIB_AUTHENTICATION_METHOD");
 150         app.clearHeader(request, "Shib-Authentication-Instant", "HTTP_SHIB_AUTHENTICATION_INSTANT");
 151         app.clearHeader(request, "Shib-AuthnContext-Class", "HTTP_SHIB_AUTHNCONTEXT_CLASS");
 152         app.clearHeader(request, "Shib-AuthnContext-Decl", "HTTP_SHIB_AUTHNCONTEXT_DECL");
 153         app.clearHeader(request, "Shib-Assertion-Count", "HTTP_SHIB_ASSERTION_COUNT");
 154         app.clearAttributeHeaders(request);
 155         request.clearHeader("REMOTE_USER", "HTTP_REMOTE_USER");
 156     }
 157 };
 158
 159 void SHIBSP_API shibsp::registerServiceProviders()
 160 {
 161     SPConfig::getConfig().ServiceProviderManager.registerFactory(XML_SERVICE_PROVIDER, XMLServiceProviderFactory);
 162 }
 163
 164 ServiceProvider::ServiceProvider()
 165 {
 166 }
 167
 168 ServiceProvider::~ServiceProvider()
 169 {
 170 }
 171
 172 #ifndef SHIBSP_LITE
 173 SecurityPolicyProvider* ServiceProvider::getSecurityPolicyProvider(bool required) const
 174 {
 175     if (required)
 176         throw ConfigurationException("No SecurityPolicyProvider available.");
 177     return NULL;
 178 }
 179 #endif
 180
 181 pair<bool,long> ServiceProvider::doAuthentication(SPRequest& request, bool handler) const
 182 {
 183 #ifdef _DEBUG
 184     xmltooling::NDC ndc("doAuthentication");
 185 #endif
 186     Category& log = Category::getInstance(SHIBSP_LOGCAT".ServiceProvider");
 187
 188     const Application* app=nullptr;
 189     string targetURL = request.getRequestURL();
 190
 191     try {
 192         RequestMapper::Settings settings = request.getRequestSettings();
 193         app = &(request.getApplication());
 194
 195         // If not SSL, check to see if we should block or redirect it.
 196         if (!request.isSecure()) {
 197             pair<bool,const char*> redirectToSSL = settings.first->getString("redirectToSSL");
 198             if (redirectToSSL.first) {
 199 #ifdef HAVE_STRCASECMP
 200                 if (!strcasecmp("GET",request.getMethod()) || !strcasecmp("HEAD",request.getMethod())) {
 201 #else
 202                 if (!stricmp("GET",request.getMethod()) || !stricmp("HEAD",request.getMethod())) {
 203 #endif
 204                     // Compute the new target URL
 205                     string redirectURL = string("https://") + request.getHostname();
 206                     if (strcmp(redirectToSSL.second,"443")) {
 207                         redirectURL = redirectURL + ':' + redirectToSSL.second;
 208                     }
 209                     redirectURL += request.getRequestURI();
 210                     return make_pair(true, request.sendRedirect(redirectURL.c_str()));
 211                 }
 212                 else {
 213                     TemplateParameters tp;
 214                     tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
 215                     return make_pair(true,sendError(log, request, app, "ssl", tp, false));
 216                 }
 217             }
 218         }
 219
 220         const char* handlerURL=request.getHandlerURL(targetURL.c_str());
 221         if (!handlerURL)
 222             throw ConfigurationException("Cannot determine handler from resource URL, check configuration.");
 223
 224         // If the request URL contains the handler base URL for this application, either dispatch
 225         // directly (mainly Apache 2.0) or just pass back control.
 226         if (strstr(targetURL.c_str(),handlerURL)) {
 227             if (handler)
 228                 return doHandler(request);
 229             else
 230                 return make_pair(true, request.returnOK());
 231         }
 232
 233         // Three settings dictate how to proceed.
 234         pair<bool,const char*> authType = settings.first->getString("authType");
 235         pair<bool,bool> requireSession = settings.first->getBool("requireSession");
 236         pair<bool,const char*> requireSessionWith = settings.first->getString("requireSessionWith");
 237
 238         // If no session is required AND the AuthType (an Apache-derived concept) isn't shibboleth,
 239         // then we ignore this request and consider it unprotected. Apache might lie to us if
 240         // ShibBasicHijack is on, but that's up to it.
 241         if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first &&
 242 #ifdef HAVE_STRCASECMP
 243                 (!authType.first || strcasecmp(authType.second,"shibboleth")))
 244 #else
 245                 (!authType.first || _stricmp(authType.second,"shibboleth")))
 246 #endif
 247             return make_pair(true,request.returnDecline());
 248
 249         // Fix for secadv 20050901
 250         clearHeaders(request);
 251
 252         Session* session = nullptr;
 253         try {
 254             session = request.getSession();
 255         }
 256         catch (exception& e) {
 257             log.warn("error during session lookup: %s", e.what());
 258             // If it's not a retryable session failure, we throw to the outer handler for reporting.
 259             if (dynamic_cast<opensaml::RetryableProfileException*>(&e)==nullptr)
 260                 throw;
 261         }
 262
 263         if (!session) {
 264             // No session.  Maybe that's acceptable?
 265             if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first)
 266                 return make_pair(true,request.returnOK());
 267
 268             // No session, but we require one. Initiate a new session using the indicated method.
 269             const SessionInitiator* initiator=nullptr;
 270             if (requireSessionWith.first) {
 271                 initiator=app->getSessionInitiatorById(requireSessionWith.second);
 272                 if (!initiator) {
 273                     throw ConfigurationException(
 274                         "No session initiator found with id ($1), check requireSessionWith command.", params(1,requireSessionWith.second)
 275                         );
 276                 }
 277             }
 278             else {
 279                 initiator=app->getDefaultSessionInitiator();
 280                 if (!initiator)
 281                     throw ConfigurationException("No default session initiator found, check configuration.");
 282             }
 283
 284             return initiator->run(request,false);
 285         }
 286
 287         request.setAuthType("shibboleth");
 288
 289         // We're done.  Everything is okay.  Nothing to report.  Nothing to do..
 290         // Let the caller decide how to proceed.
 291         log.debug("doAuthentication succeeded");
 292         return make_pair(false,0L);
 293     }
 294     catch (exception& e) {
 295         request.log(SPRequest::SPError, e.what());
 296         TemplateParameters tp(&e);
 297         tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
 298         return make_pair(true,sendError(log, request, app, "session", tp));
 299     }
 300 }
 301
 302 pair<bool,long> ServiceProvider::doAuthorization(SPRequest& request) const
 303 {
 304 #ifdef _DEBUG
 305     xmltooling::NDC ndc("doAuthorization");
 306 #endif
 307     Category& log = Category::getInstance(SHIBSP_LOGCAT".ServiceProvider");
 308
 309     const Application* app=nullptr;
 310     string targetURL = request.getRequestURL();
 311
 312     try {
 313         RequestMapper::Settings settings = request.getRequestSettings();
 314         app = &(request.getApplication());
 315
 316         // Three settings dictate how to proceed.
 317         pair<bool,const char*> authType = settings.first->getString("authType");
 318         pair<bool,bool> requireSession = settings.first->getBool("requireSession");
 319         pair<bool,const char*> requireSessionWith = settings.first->getString("requireSessionWith");
 320
 321         // If no session is required AND the AuthType (an Apache-derived concept) isn't shibboleth,
 322         // then we ignore this request and consider it unprotected. Apache might lie to us if
 323         // ShibBasicHijack is on, but that's up to it.
 324         if ((!requireSession.first || !requireSession.second) && !requireSessionWith.first &&
 325 #ifdef HAVE_STRCASECMP
 326                 (!authType.first || strcasecmp(authType.second,"shibboleth")))
 327 #else
 328                 (!authType.first || _stricmp(authType.second,"shibboleth")))
 329 #endif
 330             return make_pair(true,request.returnDecline());
 331
 332         // Do we have an access control plugin?
 333         if (settings.second) {
 334             const Session* session = nullptr;
 335             try {
 336                 session = request.getSession(false);
 337             }
 338             catch (exception& e) {
 339                 log.warn("unable to obtain session to pass to access control provider: %s", e.what());
 340             }
 341
 342             Locker acllock(settings.second);
 343             switch (settings.second->authorized(request,session)) {
 344                 case AccessControl::shib_acl_true:
 345                     log.debug("access control provider granted access");
 346                     return make_pair(true,request.returnOK());
 347
 348                 case AccessControl::shib_acl_false:
 349                 {
 350                     log.warn("access control provider denied access");
 351                     TemplateParameters tp;
 352                     tp.m_map["requestURL"] = targetURL;
 353                     return make_pair(true,sendError(log, request, app, "access", tp, false));
 354                 }
 355
 356                 default:
 357                     // Use the "DECLINE" interface to signal we don't know what to do.
 358                     return make_pair(true,request.returnDecline());
 359             }
 360         }
 361         else {
 362             return make_pair(true,request.returnDecline());
 363         }
 364     }
 365     catch (exception& e) {
 366         request.log(SPRequest::SPError, e.what());
 367         TemplateParameters tp(&e);
 368         tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
 369         return make_pair(true,sendError(log, request, app, "access", tp));
 370     }
 371 }
 372
 373 pair<bool,long> ServiceProvider::doExport(SPRequest& request, bool requireSession) const
 374 {
 375 #ifdef _DEBUG
 376     xmltooling::NDC ndc("doExport");
 377 #endif
 378     Category& log = Category::getInstance(SHIBSP_LOGCAT".ServiceProvider");
 379
 380     const Application* app=nullptr;
 381     string targetURL = request.getRequestURL();
 382
 383     try {
 384         RequestMapper::Settings settings = request.getRequestSettings();
 385         app = &(request.getApplication());
 386
 387         const Session* session = nullptr;
 388         try {
 389             session = request.getSession(false);
 390         }
 391         catch (exception& e) {
 392             log.warn("unable to obtain session to export to request: %s", e.what());
 393                 // If we have to have a session, then this is a fatal error.
 394                 if (requireSession)
 395                         throw;
 396         }
 397
 398                 // Still no data?
 399         if (!session) {
 400                 if (requireSession)
 401                 throw opensaml::RetryableProfileException("Unable to obtain session to export to request.");
 402                 else
 403                         return make_pair(false,0L);     // just bail silently
 404         }
 405
 406         app->setHeader(request, "Shib-Application-ID", app->getId());
 407         app->setHeader(request, "Shib-Session-ID", session->getID());
 408
 409         // Export the IdP name and Authn method/context info.
 410         const char* hval = session->getEntityID();
 411         if (hval)
 412             app->setHeader(request, "Shib-Identity-Provider", hval);
 413         hval = session->getAuthnInstant();
 414         if (hval)
 415             app->setHeader(request, "Shib-Authentication-Instant", hval);
 416         hval = session->getAuthnContextClassRef();
 417         if (hval) {
 418             app->setHeader(request, "Shib-Authentication-Method", hval);
 419             app->setHeader(request, "Shib-AuthnContext-Class", hval);
 420         }
 421         hval = session->getAuthnContextDeclRef();
 422         if (hval)
 423             app->setHeader(request, "Shib-AuthnContext-Decl", hval);
 424         hval = session->getSessionIndex();
 425         if (hval)
 426             app->setHeader(request, "Shib-Session-Index", hval);
 427
 428         // Maybe export the assertion keys.
 429         pair<bool,bool> exp=settings.first->getBool("exportAssertion");
 430         if (exp.first && exp.second) {
 431             const PropertySet* sessions=app->getPropertySet("Sessions");
 432             pair<bool,const char*> exportLocation = sessions ? sessions->getString("exportLocation") : pair<bool,const char*>(false,nullptr);
 433             if (!exportLocation.first)
 434                 log.warn("can't export assertions without an exportLocation Sessions property");
 435             else {
 436                 const URLEncoder* encoder = XMLToolingConfig::getConfig().getURLEncoder();
 437                 string exportName = "Shib-Assertion-00";
 438                 string baseURL;
 439                 if (!strncmp(exportLocation.second, "http", 4))
 440                     baseURL = exportLocation.second;
 441                 else
 442                     baseURL = string(request.getHandlerURL(targetURL.c_str())) + exportLocation.second;
 443                 baseURL = baseURL + "?key=" + session->getID() + "&ID=";
 444                 const vector<const char*>& tokens = session->getAssertionIDs();
 445                 vector<const char*>::size_type count = 0;
 446                 for (vector<const char*>::const_iterator tokenids = tokens.begin(); tokenids!=tokens.end(); ++tokenids) {
 447                     count++;
 448                     *(exportName.rbegin()) = '0' + (count%10);
 449                     *(++exportName.rbegin()) = '0' + (count/10);
 450                     string fullURL = baseURL + encoder->encode(*tokenids);
 451                     app->setHeader(request, exportName.c_str(), fullURL.c_str());
 452                 }
 453                 app->setHeader(request, "Shib-Assertion-Count", exportName.c_str() + 15);
 454             }
 455         }
 456
 457         // Export the attributes.
 458         const multimap<string,const Attribute*>& attributes = session->getIndexedAttributes();
 459         for (multimap<string,const Attribute*>::const_iterator a = attributes.begin(); a!=attributes.end(); ++a) {
 460             if (a->second->isInternal())
 461                 continue;
 462             string header(app->getSecureHeader(request, a->first.c_str()));
 463             const vector<string>& vals = a->second->getSerializedValues();
 464             for (vector<string>::const_iterator v = vals.begin(); v!=vals.end(); ++v) {
 465                 if (!header.empty())
 466                     header += ";";
 467                 string::size_type pos = v->find_first_of(';',string::size_type(0));
 468                 if (pos!=string::npos) {
 469                     string value(*v);
 470                     for (; pos != string::npos; pos = value.find_first_of(';',pos)) {
 471                         value.insert(pos, "\\");
 472                         pos += 2;
 473                     }
 474                     header += value;
 475                 }
 476                 else {
 477                     header += (*v);
 478                 }
 479             }
 480             app->setHeader(request, a->first.c_str(), header.c_str());
 481         }
 482
 483         // Check for REMOTE_USER.
 484         bool remoteUserSet = false;
 485         const vector<string>& rmids = app->getRemoteUserAttributeIds();
 486         for (vector<string>::const_iterator rmid = rmids.begin(); !remoteUserSet && rmid != rmids.end(); ++rmid) {
 487             pair<multimap<string,const Attribute*>::const_iterator,multimap<string,const Attribute*>::const_iterator> matches =
 488                 attributes.equal_range(*rmid);
 489             for (; matches.first != matches.second; ++matches.first) {
 490                 const vector<string>& vals = matches.first->second->getSerializedValues();
 491                 if (!vals.empty()) {
 492                     request.setRemoteUser(vals.front().c_str());
 493                     remoteUserSet = true;
 494                     break;
 495                 }
 496             }
 497         }
 498
 499         return make_pair(false,0L);
 500     }
 501     catch (exception& e) {
 502         request.log(SPRequest::SPError, e.what());
 503         TemplateParameters tp(&e);
 504         tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
 505         return make_pair(true,sendError(log, request, app, "session", tp));
 506     }
 507 }
 508
 509 pair<bool,long> ServiceProvider::doHandler(SPRequest& request) const
 510 {
 511 #ifdef _DEBUG
 512     xmltooling::NDC ndc("doHandler");
 513 #endif
 514     Category& log = Category::getInstance(SHIBSP_LOGCAT".ServiceProvider");
 515
 516     const Application* app=nullptr;
 517     string targetURL = request.getRequestURL();
 518
 519     try {
 520         RequestMapper::Settings settings = request.getRequestSettings();
 521         app = &(request.getApplication());
 522
 523         // If not SSL, check to see if we should block or redirect it.
 524         if (!request.isSecure()) {
 525             pair<bool,const char*> redirectToSSL = settings.first->getString("redirectToSSL");
 526             if (redirectToSSL.first) {
 527 #ifdef HAVE_STRCASECMP
 528                 if (!strcasecmp("GET",request.getMethod()) || !strcasecmp("HEAD",request.getMethod())) {
 529 #else
 530                 if (!stricmp("GET",request.getMethod()) || !stricmp("HEAD",request.getMethod())) {
 531 #endif
 532                     // Compute the new target URL
 533                     string redirectURL = string("https://") + request.getHostname();
 534                     if (strcmp(redirectToSSL.second,"443")) {
 535                         redirectURL = redirectURL + ':' + redirectToSSL.second;
 536                     }
 537                     redirectURL += request.getRequestURI();
 538                     return make_pair(true, request.sendRedirect(redirectURL.c_str()));
 539                 }
 540                 else {
 541                     TemplateParameters tp;
 542                     tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
 543                     return make_pair(true,sendError(log, request, app, "ssl", tp, false));
 544                 }
 545             }
 546         }
 547
 548         const char* handlerURL=request.getHandlerURL(targetURL.c_str());
 549         if (!handlerURL)
 550             throw ConfigurationException("Cannot determine handler from resource URL, check configuration.");
 551
 552         // Make sure we only process handler requests.
 553         if (!strstr(targetURL.c_str(),handlerURL))
 554             return make_pair(true, request.returnDecline());
 555
 556         const PropertySet* sessionProps=app->getPropertySet("Sessions");
 557         if (!sessionProps)
 558             throw ConfigurationException("Unable to map request to application session settings, check configuration.");
 559
 560         // Process incoming request.
 561         pair<bool,bool> handlerSSL=sessionProps->getBool("handlerSSL");
 562
 563         // Make sure this is SSL, if it should be
 564         if ((!handlerSSL.first || handlerSSL.second) && !request.isSecure())
 565             throw opensaml::FatalProfileException("Blocked non-SSL access to Shibboleth handler.");
 566
 567         // We dispatch based on our path info. We know the request URL begins with or equals the handler URL,
 568         // so the path info is the next character (or null).
 569         const Handler* handler=app->getHandler(targetURL.c_str() + strlen(handlerURL));
 570         if (!handler)
 571             throw ConfigurationException("Shibboleth handler invoked at an unconfigured location.");
 572
 573         pair<bool,long> hret=handler->run(request);
 574
 575         // Did the handler run successfully?
 576         if (hret.first)
 577             return hret;
 578
 579         throw ConfigurationException("Configured Shibboleth handler failed to process the request.");
 580     }
 581     catch (exception& e) {
 582         request.log(SPRequest::SPError, e.what());
 583         TemplateParameters tp(&e);
 584         tp.m_map["requestURL"] = targetURL.substr(0,targetURL.find('?'));
 585         tp.m_request = &request;
 586         return make_pair(true,sendError(log, request, app, "session", tp));
 587     }
 588 }