xref: /openbmc/bmcweb/http/http_connection.hpp (revision d32c4fa9) 
1 #pragma once
2 #include "bmcweb_config.h"
3 
4 #include "authorization.hpp"
5 #include "http_response.hpp"
6 #include "http_utility.hpp"
7 #include "logging.hpp"
8 #include "timer_queue.hpp"
9 #include "utility.hpp"
10 
11 #include <boost/algorithm/string.hpp>
12 #include <boost/algorithm/string/predicate.hpp>
13 #include <boost/asio/io_context.hpp>
14 #include <boost/asio/ip/tcp.hpp>
15 #include <boost/asio/ssl/stream.hpp>
16 #include <boost/beast/core/flat_static_buffer.hpp>
17 #include <boost/beast/ssl/ssl_stream.hpp>
18 #include <boost/beast/websocket.hpp>
19 #include <boost/url/url_view.hpp>
20 #include <json_html_serializer.hpp>
21 #include <security_headers.hpp>
22 #include <ssl_key_handler.hpp>
23 
24 #include <atomic>
25 #include <chrono>
26 #include <vector>
27 
28 namespace crow
29 {
30 
31 inline void prettyPrintJson(crow::Response& res)
32 {
33     json_html_util::dumpHtml(res.body(), res.jsonValue);
34 
35     res.addHeader("Content-Type", "text/html;charset=UTF-8");
36 }
37 
38 #ifdef BMCWEB_ENABLE_DEBUG
39 static std::atomic<int> connectionCount;
40 #endif
41 
42 // request body limit size set by the bmcwebHttpReqBodyLimitMb option
43 constexpr unsigned int httpReqBodyLimit =
44     1024 * 1024 * bmcwebHttpReqBodyLimitMb;
45 
46 constexpr uint64_t loggedOutPostBodyLimit = 4096;
47 
48 constexpr uint32_t httpHeaderLimit = 8192;
49 
50 // drop all connections after 1 minute, this time limit was chosen
51 // arbitrarily and can be adjusted later if needed
52 static constexpr const size_t loggedInAttempts =
53     (60 / timerQueueTimeoutSeconds);
54 
55 static constexpr const size_t loggedOutAttempts =
56     (15 / timerQueueTimeoutSeconds);
57 
58 template <typename Adaptor, typename Handler>
59 class Connection :
60     public std::enable_shared_from_this<Connection<Adaptor, Handler>>
61 {
62   public:
63     Connection(Handler* handlerIn,
64                std::function<std::string()>& getCachedDateStrF,
65                detail::TimerQueue& timerQueueIn, Adaptor adaptorIn) :
66         adaptor(std::move(adaptorIn)),
67         handler(handlerIn), getCachedDateStr(getCachedDateStrF),
68         timerQueue(timerQueueIn)
69     {
70         parser.emplace(std::piecewise_construct, std::make_tuple());
71         parser->body_limit(httpReqBodyLimit);
72         parser->header_limit(httpHeaderLimit);
73 
74 #ifdef BMCWEB_ENABLE_MUTUAL_TLS_AUTHENTICATION
75         prepareMutualTls();
76 #endif // BMCWEB_ENABLE_MUTUAL_TLS_AUTHENTICATION
77 
78 #ifdef BMCWEB_ENABLE_DEBUG
79         connectionCount++;
80         BMCWEB_LOG_DEBUG << this << " Connection open, total "
81                          << connectionCount;
82 #endif
83     }
84 
85     ~Connection()
86     {
87         res.setCompleteRequestHandler(nullptr);
88         cancelDeadlineTimer();
89 #ifdef BMCWEB_ENABLE_DEBUG
90         connectionCount--;
91         BMCWEB_LOG_DEBUG << this << " Connection closed, total "
92                          << connectionCount;
93 #endif
94     }
95 
96     void prepareMutualTls()
97     {
98         std::error_code error;
99         std::filesystem::path caPath(ensuressl::trustStorePath);
100         auto caAvailable = !std::filesystem::is_empty(caPath, error);
101         caAvailable = caAvailable && !error;
102         if (caAvailable && persistent_data::SessionStore::getInstance()
103                                .getAuthMethodsConfig()
104                                .tls)
105         {
106             adaptor.set_verify_mode(boost::asio::ssl::verify_peer);
107             std::string id = "bmcweb";
108             int ret = SSL_set_session_id_context(
109                 adaptor.native_handle(),
110                 reinterpret_cast<const unsigned char*>(id.c_str()),
111                 static_cast<unsigned int>(id.length()));
112             if (ret == 0)
113             {
114                 BMCWEB_LOG_ERROR << this << " failed to set SSL id";
115             }
116         }
117 
118         adaptor.set_verify_callback([this](
119                                         bool preverified,
120                                         boost::asio::ssl::verify_context& ctx) {
121             // do nothing if TLS is disabled
122             if (!persistent_data::SessionStore::getInstance()
123                      .getAuthMethodsConfig()
124                      .tls)
125             {
126                 BMCWEB_LOG_DEBUG << this << " TLS auth_config is disabled";
127                 return true;
128             }
129 
130             // We always return true to allow full auth flow
131             if (!preverified)
132             {
133                 BMCWEB_LOG_DEBUG << this << " TLS preverification failed.";
134                 return true;
135             }
136 
137             X509_STORE_CTX* cts = ctx.native_handle();
138             if (cts == nullptr)
139             {
140                 BMCWEB_LOG_DEBUG << this << " Cannot get native TLS handle.";
141                 return true;
142             }
143 
144             // Get certificate
145             X509* peerCert =
146                 X509_STORE_CTX_get_current_cert(ctx.native_handle());
147             if (peerCert == nullptr)
148             {
149                 BMCWEB_LOG_DEBUG << this
150                                  << " Cannot get current TLS certificate.";
151                 return true;
152             }
153 
154             // Check if certificate is OK
155             int error = X509_STORE_CTX_get_error(cts);
156             if (error != X509_V_OK)
157             {
158                 BMCWEB_LOG_INFO << this << " Last TLS error is: " << error;
159                 return true;
160             }
161             // Check that we have reached final certificate in chain
162             int32_t depth = X509_STORE_CTX_get_error_depth(cts);
163             if (depth != 0)
164 
165             {
166                 BMCWEB_LOG_DEBUG
167                     << this << " Certificate verification in progress (depth "
168                     << depth << "), waiting to reach final depth";
169                 return true;
170             }
171 
172             BMCWEB_LOG_DEBUG << this
173                              << " Certificate verification of final depth";
174 
175             // Verify KeyUsage
176             bool isKeyUsageDigitalSignature = false;
177             bool isKeyUsageKeyAgreement = false;
178 
179             ASN1_BIT_STRING* usage = static_cast<ASN1_BIT_STRING*>(
180                 X509_get_ext_d2i(peerCert, NID_key_usage, nullptr, nullptr));
181 
182             if (usage == nullptr)
183             {
184                 BMCWEB_LOG_DEBUG << this << " TLS usage is null";
185                 return true;
186             }
187 
188             for (int i = 0; i < usage->length; i++)
189             {
190                 if (KU_DIGITAL_SIGNATURE & usage->data[i])
191                 {
192                     isKeyUsageDigitalSignature = true;
193                 }
194                 if (KU_KEY_AGREEMENT & usage->data[i])
195                 {
196                     isKeyUsageKeyAgreement = true;
197                 }
198             }
199             ASN1_BIT_STRING_free(usage);
200 
201             if (!isKeyUsageDigitalSignature || !isKeyUsageKeyAgreement)
202             {
203                 BMCWEB_LOG_DEBUG << this
204                                  << " Certificate ExtendedKeyUsage does "
205                                     "not allow provided certificate to "
206                                     "be used for user authentication";
207                 return true;
208             }
209 
210             // Determine that ExtendedKeyUsage includes Client Auth
211 
212             stack_st_ASN1_OBJECT* extUsage =
213                 static_cast<stack_st_ASN1_OBJECT*>(X509_get_ext_d2i(
214                     peerCert, NID_ext_key_usage, nullptr, nullptr));
215 
216             if (extUsage == nullptr)
217             {
218                 BMCWEB_LOG_DEBUG << this << " TLS extUsage is null";
219                 return true;
220             }
221 
222             bool isExKeyUsageClientAuth = false;
223             for (int i = 0; i < sk_ASN1_OBJECT_num(extUsage); i++)
224             {
225                 if (NID_client_auth ==
226                     OBJ_obj2nid(sk_ASN1_OBJECT_value(extUsage, i)))
227                 {
228                     isExKeyUsageClientAuth = true;
229                     break;
230                 }
231             }
232             sk_ASN1_OBJECT_free(extUsage);
233 
234             // Certificate has to have proper key usages set
235             if (!isExKeyUsageClientAuth)
236             {
237                 BMCWEB_LOG_DEBUG << this
238                                  << " Certificate ExtendedKeyUsage does "
239                                     "not allow provided certificate to "
240                                     "be used for user authentication";
241                 return true;
242             }
243             std::string sslUser;
244             // Extract username contained in CommonName
245             sslUser.resize(256, '\0');
246 
247             int status = X509_NAME_get_text_by_NID(
248                 X509_get_subject_name(peerCert), NID_commonName, sslUser.data(),
249                 static_cast<int>(sslUser.size()));
250 
251             if (status == -1)
252             {
253                 BMCWEB_LOG_DEBUG
254                     << this << " TLS cannot get username to create session";
255                 return true;
256             }
257 
258             size_t lastChar = sslUser.find('\0');
259             if (lastChar == std::string::npos || lastChar == 0)
260             {
261                 BMCWEB_LOG_DEBUG << this << " Invalid TLS user name";
262                 return true;
263             }
264             sslUser.resize(lastChar);
265             std::string unsupportedClientId = "";
266             sessionIsFromTransport = true;
267             userSession = persistent_data::SessionStore::getInstance()
268                               .generateUserSession(
269                                   sslUser, req->ipAddress.to_string(),
270                                   unsupportedClientId,
271                                   persistent_data::PersistenceType::TIMEOUT);
272             if (userSession != nullptr)
273             {
274                 BMCWEB_LOG_DEBUG
275                     << this
276                     << " Generating TLS session: " << userSession->uniqueId;
277             }
278             return true;
279         });
280     }
281 
282     Adaptor& socket()
283     {
284         return adaptor;
285     }
286 
287     void start()
288     {
289 
290         startDeadline(0);
291 
292         // TODO(ed) Abstract this to a more clever class with the idea of an
293         // asynchronous "start"
294         if constexpr (std::is_same_v<Adaptor,
295                                      boost::beast::ssl_stream<
296                                          boost::asio::ip::tcp::socket>>)
297         {
298             adaptor.async_handshake(boost::asio::ssl::stream_base::server,
299                                     [this, self(shared_from_this())](
300                                         const boost::system::error_code& ec) {
301                                         if (ec)
302                                         {
303                                             return;
304                                         }
305                                         doReadHeaders();
306                                     });
307         }
308         else
309         {
310             doReadHeaders();
311         }
312     }
313 
314     void handle()
315     {
316         cancelDeadlineTimer();
317 
318         crow::Request& thisReq = req.emplace(parser->release());
319         thisReq.session = userSession;
320 
321         // Fetch the client IP address
322         readClientIp();
323 
324         // Check for HTTP version 1.1.
325         if (thisReq.version() == 11)
326         {
327             if (thisReq.getHeaderValue(boost::beast::http::field::host).empty())
328             {
329                 res.result(boost::beast::http::status::bad_request);
330                 completeRequest();
331                 return;
332             }
333         }
334 
335         BMCWEB_LOG_INFO << "Request: "
336                         << " " << this << " HTTP/" << thisReq.version() / 10
337                         << "." << thisReq.version() % 10 << ' '
338                         << thisReq.methodString() << " " << thisReq.target()
339                         << " " << thisReq.ipAddress;
340 
341         boost::urls::error_code ec;
342         req->urlView = boost::urls::parse_relative_ref(
343             boost::urls::string_view(req->target().data(),
344                                      req->target().size()),
345             ec);
346         if (ec)
347         {
348             return;
349         }
350         req->url = std::string_view(req->urlView.encoded_path().data(),
351                                     req->urlView.encoded_path().size());
352 
353         res.setCompleteRequestHandler(nullptr);
354         res.isAliveHelper = [this]() -> bool { return isAlive(); };
355 
356         thisReq.ioService = static_cast<decltype(thisReq.ioService)>(
357             &adaptor.get_executor().context());
358 
359         if (res.completed)
360         {
361             completeRequest();
362             return;
363         }
364         res.setCompleteRequestHandler([self(shared_from_this())] {
365             boost::asio::post(self->adaptor.get_executor(),
366                               [self] { self->completeRequest(); });
367         });
368 
369         if (thisReq.isUpgrade() &&
370             boost::iequals(
371                 thisReq.getHeaderValue(boost::beast::http::field::upgrade),
372                 "websocket"))
373         {
374             handler->handleUpgrade(thisReq, res, std::move(adaptor));
375             // delete lambda with self shared_ptr
376             // to enable connection destruction
377             res.setCompleteRequestHandler(nullptr);
378             return;
379         }
380         auto asyncResp = std::make_shared<bmcweb::AsyncResp>(res);
381         handler->handle(thisReq, asyncResp);
382     }
383 
384     bool isAlive()
385     {
386         if constexpr (std::is_same_v<Adaptor,
387                                      boost::beast::ssl_stream<
388                                          boost::asio::ip::tcp::socket>>)
389         {
390             return adaptor.next_layer().is_open();
391         }
392         else
393         {
394             return adaptor.is_open();
395         }
396     }
397     void close()
398     {
399         if constexpr (std::is_same_v<Adaptor,
400                                      boost::beast::ssl_stream<
401                                          boost::asio::ip::tcp::socket>>)
402         {
403             adaptor.next_layer().close();
404 #ifdef BMCWEB_ENABLE_MUTUAL_TLS_AUTHENTICATION
405             if (userSession != nullptr)
406             {
407                 BMCWEB_LOG_DEBUG
408                     << this
409                     << " Removing TLS session: " << userSession->uniqueId;
410                 persistent_data::SessionStore::getInstance().removeSession(
411                     userSession);
412             }
413 #endif // BMCWEB_ENABLE_MUTUAL_TLS_AUTHENTICATION
414         }
415         else
416         {
417             adaptor.close();
418         }
419     }
420 
421     void completeRequest()
422     {
423         BMCWEB_LOG_INFO << "Response: " << this << ' ' << req->url << ' '
424                         << res.resultInt() << " keepalive=" << req->keepAlive();
425 
426         addSecurityHeaders(*req, res);
427 
428         crow::authorization::cleanupTempSession(*req);
429 
430         if (!isAlive())
431         {
432             // BMCWEB_LOG_DEBUG << this << " delete (socket is closed) " <<
433             // isReading
434             // << ' ' << isWriting;
435             // delete this;
436 
437             // delete lambda with self shared_ptr
438             // to enable connection destruction
439             res.setCompleteRequestHandler(nullptr);
440             return;
441         }
442         if (res.body().empty() && !res.jsonValue.empty())
443         {
444             if (http_helpers::requestPrefersHtml(req->getHeaderValue("Accept")))
445             {
446                 prettyPrintJson(res);
447             }
448             else
449             {
450                 res.jsonMode();
451                 res.body() = res.jsonValue.dump(
452                     2, ' ', true, nlohmann::json::error_handler_t::replace);
453             }
454         }
455 
456         if (res.resultInt() >= 400 && res.body().empty())
457         {
458             res.body() = std::string(res.reason());
459         }
460 
461         if (res.result() == boost::beast::http::status::no_content)
462         {
463             // Boost beast throws if content is provided on a no-content
464             // response.  Ideally, this would never happen, but in the case that
465             // it does, we don't want to throw.
466             BMCWEB_LOG_CRITICAL
467                 << this << " Response content provided but code was no-content";
468             res.body().clear();
469         }
470 
471         res.addHeader(boost::beast::http::field::date, getCachedDateStr());
472 
473         res.keepAlive(req->keepAlive());
474 
475         doWrite();
476 
477         // delete lambda with self shared_ptr
478         // to enable connection destruction
479         res.setCompleteRequestHandler(nullptr);
480     }
481 
482     void readClientIp()
483     {
484         boost::asio::ip::address ip;
485         boost::system::error_code ec = getClientIp(ip);
486         if (ec)
487         {
488             return;
489         }
490         req->ipAddress = ip;
491     }
492 
493     boost::system::error_code getClientIp(boost::asio::ip::address& ip)
494     {
495         boost::system::error_code ec;
496         BMCWEB_LOG_DEBUG << "Fetch the client IP address";
497         boost::asio::ip::tcp::endpoint endpoint =
498             boost::beast::get_lowest_layer(adaptor).remote_endpoint(ec);
499 
500         if (ec)
501         {
502             // If remote endpoint fails keep going. "ClientOriginIPAddress"
503             // will be empty.
504             BMCWEB_LOG_ERROR << "Failed to get the client's IP Address. ec : "
505                              << ec;
506             return ec;
507         }
508         ip = endpoint.address();
509         return ec;
510     }
511 
512   private:
513     void doReadHeaders()
514     {
515         BMCWEB_LOG_DEBUG << this << " doReadHeaders";
516 
517         // Clean up any previous Connection.
518         boost::beast::http::async_read_header(
519             adaptor, buffer, *parser,
520             [this,
521              self(shared_from_this())](const boost::system::error_code& ec,
522                                        std::size_t bytesTransferred) {
523                 BMCWEB_LOG_ERROR << this << " async_read_header "
524                                  << bytesTransferred << " Bytes";
525                 bool errorWhileReading = false;
526                 if (ec)
527                 {
528                     errorWhileReading = true;
529                     BMCWEB_LOG_ERROR
530                         << this << " Error while reading: " << ec.message();
531                 }
532                 else
533                 {
534                     // if the adaptor isn't open anymore, and wasn't handed to a
535                     // websocket, treat as an error
536                     if (!isAlive() &&
537                         !boost::beast::websocket::is_upgrade(parser->get()))
538                     {
539                         errorWhileReading = true;
540                     }
541                 }
542 
543                 cancelDeadlineTimer();
544 
545                 if (errorWhileReading)
546                 {
547                     close();
548                     BMCWEB_LOG_DEBUG << this << " from read(1)";
549                     return;
550                 }
551 
552                 boost::beast::http::verb method = parser->get().method();
553                 readClientIp();
554                 boost::urls::error_code uriEc;
555                 boost::urls::string_view uriStringView(
556                     parser->get().target().data(),
557                     parser->get().target().size());
558                 BMCWEB_LOG_DEBUG << "Parsing URI: " << uriStringView;
559                 req->urlView =
560                     boost::urls::parse_relative_ref(uriStringView, uriEc);
561                 if (uriEc)
562                 {
563                     BMCWEB_LOG_ERROR << "Failed to parse URI "
564                                      << uriEc.message();
565                     return;
566                 }
567                 req->url = std::string_view(req->urlView.encoded_path().data(),
568                                             req->urlView.encoded_path().size());
569 
570                 boost::asio::ip::address ip;
571                 if (getClientIp(ip))
572                 {
573                     BMCWEB_LOG_DEBUG << "Unable to get client IP";
574                 }
575                 sessionIsFromTransport = false;
576                 userSession = crow::authorization::authenticate(
577                     req->url, ip, res, method, parser->get().base(),
578                     userSession);
579                 bool loggedIn = userSession != nullptr;
580                 if (loggedIn)
581                 {
582                     startDeadline(loggedInAttempts);
583                     BMCWEB_LOG_DEBUG << "Starting slow deadline";
584 
585                     req->urlParams = req->urlView.query_params();
586 
587 #ifdef BMCWEB_ENABLE_DEBUG
588                     std::string paramList = "";
589                     for (const auto param : req->urlParams)
590                     {
591                         paramList += param->key() + " " + param->value() + " ";
592                     }
593                     BMCWEB_LOG_DEBUG << "QueryParams: " << paramList;
594 #endif
595                 }
596                 else
597                 {
598                     const boost::optional<uint64_t> contentLength =
599                         parser->content_length();
600                     if (contentLength &&
601                         *contentLength > loggedOutPostBodyLimit)
602                     {
603                         BMCWEB_LOG_DEBUG << "Content length greater than limit "
604                                          << *contentLength;
605                         close();
606                         return;
607                     }
608 
609                     startDeadline(loggedOutAttempts);
610                     BMCWEB_LOG_DEBUG << "Starting quick deadline";
611                 }
612                 doRead();
613             });
614     }
615 
616     void doRead()
617     {
618         BMCWEB_LOG_DEBUG << this << " doRead";
619 
620         boost::beast::http::async_read(
621             adaptor, buffer, *parser,
622             [this,
623              self(shared_from_this())](const boost::system::error_code& ec,
624                                        std::size_t bytesTransferred) {
625                 BMCWEB_LOG_DEBUG << this << " async_read " << bytesTransferred
626                                  << " Bytes";
627 
628                 bool errorWhileReading = false;
629                 if (ec)
630                 {
631                     BMCWEB_LOG_ERROR
632                         << this << " Error while reading: " << ec.message();
633                     errorWhileReading = true;
634                 }
635                 else
636                 {
637                     if (isAlive())
638                     {
639                         cancelDeadlineTimer();
640                         if (userSession != nullptr)
641                         {
642                             startDeadline(loggedInAttempts);
643                         }
644                         else
645                         {
646                             startDeadline(loggedOutAttempts);
647                         }
648                     }
649                     else
650                     {
651                         errorWhileReading = true;
652                     }
653                 }
654                 if (errorWhileReading)
655                 {
656                     cancelDeadlineTimer();
657                     close();
658                     BMCWEB_LOG_DEBUG << this << " from read(1)";
659                     return;
660                 }
661                 handle();
662             });
663     }
664 
665     void doWrite()
666     {
667         bool loggedIn = req && req->session;
668         if (loggedIn)
669         {
670             startDeadline(loggedInAttempts);
671         }
672         else
673         {
674             startDeadline(loggedOutAttempts);
675         }
676         BMCWEB_LOG_DEBUG << this << " doWrite";
677         res.preparePayload();
678         serializer.emplace(*res.stringResponse);
679         boost::beast::http::async_write(
680             adaptor, *serializer,
681             [this,
682              self(shared_from_this())](const boost::system::error_code& ec,
683                                        std::size_t bytesTransferred) {
684                 BMCWEB_LOG_DEBUG << this << " async_write " << bytesTransferred
685                                  << " bytes";
686 
687                 cancelDeadlineTimer();
688 
689                 if (ec)
690                 {
691                     BMCWEB_LOG_DEBUG << this << " from write(2)";
692                     return;
693                 }
694                 if (!res.keepAlive())
695                 {
696                     close();
697                     BMCWEB_LOG_DEBUG << this << " from write(1)";
698                     return;
699                 }
700 
701                 serializer.reset();
702                 BMCWEB_LOG_DEBUG << this << " Clearing response";
703                 res.clear();
704                 parser.emplace(std::piecewise_construct, std::make_tuple());
705                 parser->body_limit(httpReqBodyLimit); // reset body limit for
706                                                       // newly created parser
707                 buffer.consume(buffer.size());
708 
709                 // If the session was built from the transport, we don't need to
710                 // clear it.  All other sessions are generated per request.
711                 if (!sessionIsFromTransport)
712                 {
713                     userSession = nullptr;
714                 }
715 
716                 req.emplace(parser->release());
717                 doReadHeaders();
718             });
719     }
720 
721     void cancelDeadlineTimer()
722     {
723         if (timerCancelKey)
724         {
725             BMCWEB_LOG_DEBUG << this << " timer cancelled: " << &timerQueue
726                              << ' ' << *timerCancelKey;
727             timerQueue.cancel(*timerCancelKey);
728             timerCancelKey.reset();
729         }
730     }
731 
732     void startDeadline(size_t timerIterations)
733     {
734         cancelDeadlineTimer();
735 
736         if (timerIterations)
737         {
738             timerIterations--;
739         }
740 
741         timerCancelKey =
742             timerQueue.add([self(shared_from_this()), timerIterations,
743                             readCount{parser->get().body().size()}] {
744                 // Mark timer as not active to avoid canceling it during
745                 // Connection destructor which leads to double free issue
746                 self->timerCancelKey.reset();
747                 if (!self->isAlive())
748                 {
749                     return;
750                 }
751 
752                 bool loggedIn = self->req && self->req->session;
753                 // allow slow uploads for logged in users
754                 if (loggedIn && self->parser->get().body().size() > readCount)
755                 {
756                     BMCWEB_LOG_DEBUG << self.get()
757                                      << " restart timer - read in progress";
758                     self->startDeadline(timerIterations);
759                     return;
760                 }
761 
762                 // Threshold can be used to drop slow connections
763                 // to protect against slow-rate DoS attack
764                 if (timerIterations)
765                 {
766                     BMCWEB_LOG_DEBUG << self.get() << " restart timer";
767                     self->startDeadline(timerIterations);
768                     return;
769                 }
770 
771                 self->close();
772             });
773 
774         if (!timerCancelKey)
775         {
776             close();
777             return;
778         }
779         BMCWEB_LOG_DEBUG << this << " timer added: " << &timerQueue << ' '
780                          << *timerCancelKey;
781     }
782 
783   private:
784     Adaptor adaptor;
785     Handler* handler;
786     // Making this a std::optional allows it to be efficiently destroyed and
787     // re-created on Connection reset
788     std::optional<
789         boost::beast::http::request_parser<boost::beast::http::string_body>>
790         parser;
791 
792     boost::beast::flat_static_buffer<8192> buffer;
793 
794     std::optional<boost::beast::http::response_serializer<
795         boost::beast::http::string_body>>
796         serializer;
797 
798     std::optional<crow::Request> req;
799     crow::Response res;
800 
801     bool sessionIsFromTransport = false;
802     std::shared_ptr<persistent_data::UserSession> userSession;
803 
804     std::optional<size_t> timerCancelKey;
805 
806     std::function<std::string()>& getCachedDateStr;
807     detail::TimerQueue& timerQueue;
808 
809     using std::enable_shared_from_this<
810         Connection<Adaptor, Handler>>::shared_from_this;
811 };
812 } // namespace crow
813