boost/beast/websocket/impl/accept.hpp

   1 //
   2 // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // Official repository: https://github.com/boostorg/beast
   8 //
   9
  10 #ifndef BOOST_BEAST_WEBSOCKET_IMPL_ACCEPT_IPP
  11 #define BOOST_BEAST_WEBSOCKET_IMPL_ACCEPT_IPP
  12
  13 #include <boost/beast/websocket/impl/stream_impl.hpp>
  14 #include <boost/beast/websocket/detail/type_traits.hpp>
  15 #include <boost/beast/http/empty_body.hpp>
  16 #include <boost/beast/http/parser.hpp>
  17 #include <boost/beast/http/read.hpp>
  18 #include <boost/beast/http/string_body.hpp>
  19 #include <boost/beast/http/write.hpp>
  20 #include <boost/beast/core/async_base.hpp>
  21 #include <boost/beast/core/buffer_traits.hpp>
  22 #include <boost/beast/core/stream_traits.hpp>
  23 #include <boost/beast/core/detail/buffer.hpp>
  24 #include <boost/beast/version.hpp>
  25 #include <boost/asio/coroutine.hpp>
  26 #include <boost/asio/post.hpp>
  27 #include <boost/assert.hpp>
  28 #include <boost/throw_exception.hpp>
  29 #include <memory>
  30 #include <type_traits>
  31
  32 namespace boost {
  33 namespace beast {
  34 namespace websocket {
  35
  36 //------------------------------------------------------------------------------
  37
  38 namespace detail {
  39
  40 template<class Body, class Allocator>
  41 void
  42 impl_base<true>::
  43 build_response_pmd(
  44     http::response<http::string_body>& res,
  45     http::request<Body,
  46         http::basic_fields<Allocator>> const& req)
  47 {
  48     pmd_offer offer;
  49     pmd_offer unused;
  50     pmd_read(offer, req);
  51     pmd_negotiate(res, unused, offer, pmd_opts_);
  52 }
  53
  54 template<class Body, class Allocator>
  55 void
  56 impl_base<false>::
  57 build_response_pmd(
  58     http::response<http::string_body>&,
  59     http::request<Body,
  60         http::basic_fields<Allocator>> const&)
  61 {
  62 }
  63
  64 } // detail
  65
  66 template<class NextLayer, bool deflateSupported>
  67 template<class Body, class Allocator, class Decorator>
  68 response_type
  69 stream<NextLayer, deflateSupported>::impl_type::
  70 build_response(
  71     http::request<Body,
  72         http::basic_fields<Allocator>> const& req,
  73     Decorator const& decorator,
  74     error_code& result)
  75 {
  76     auto const decorate =
  77         [this, &decorator](response_type& res)
  78         {
  79             decorator_opt(res);
  80             decorator(res);
  81             if(! res.count(http::field::server))
  82                 res.set(http::field::server,
  83                     string_view(BOOST_BEAST_VERSION_STRING));
  84         };
  85     auto err =
  86         [&](error e)
  87         {
  88             result = e;
  89             response_type res;
  90             res.version(req.version());
  91             res.result(http::status::bad_request);
  92             res.body() = result.message();
  93             res.prepare_payload();
  94             decorate(res);
  95             return res;
  96         };
  97     if(req.version() != 11)
  98         return err(error::bad_http_version);
  99     if(req.method() != http::verb::get)
 100         return err(error::bad_method);
 101     if(! req.count(http::field::host))
 102         return err(error::no_host);
 103     {
 104         auto const it = req.find(http::field::connection);
 105         if(it == req.end())
 106             return err(error::no_connection);
 107         if(! http::token_list{it->value()}.exists("upgrade"))
 108             return err(error::no_connection_upgrade);
 109     }
 110     {
 111         auto const it = req.find(http::field::upgrade);
 112         if(it == req.end())
 113             return err(error::no_upgrade);
 114         if(! http::token_list{it->value()}.exists("websocket"))
 115             return err(error::no_upgrade_websocket);
 116     }
 117     string_view key;
 118     {
 119         auto const it = req.find(http::field::sec_websocket_key);
 120         if(it == req.end())
 121             return err(error::no_sec_key);
 122         key = it->value();
 123         if(key.size() > detail::sec_ws_key_type::max_size_n)
 124             return err(error::bad_sec_key);
 125     }
 126     {
 127         auto const it = req.find(http::field::sec_websocket_version);
 128         if(it == req.end())
 129             return err(error::no_sec_version);
 130         if(it->value() != "13")
 131         {
 132             response_type res;
 133             res.result(http::status::upgrade_required);
 134             res.version(req.version());
 135             res.set(http::field::sec_websocket_version, "13");
 136             result = error::bad_sec_version;
 137             res.body() = result.message();
 138             res.prepare_payload();
 139             decorate(res);
 140             return res;
 141         }
 142     }
 143
 144     response_type res;
 145     res.result(http::status::switching_protocols);
 146     res.version(req.version());
 147     res.set(http::field::upgrade, "websocket");
 148     res.set(http::field::connection, "upgrade");
 149     {
 150         detail::sec_ws_accept_type acc;
 151         detail::make_sec_ws_accept(acc, key);
 152         res.set(http::field::sec_websocket_accept, acc);
 153     }
 154     this->build_response_pmd(res, req);
 155     decorate(res);
 156     result = {};
 157     return res;
 158 }
 159
 160 //------------------------------------------------------------------------------
 161
 162 /** Respond to an HTTP request
 163 */
 164 template<class NextLayer, bool deflateSupported>
 165 template<class Handler>
 166 class stream<NextLayer, deflateSupported>::response_op
 167     : public beast::stable_async_base<
 168         Handler, beast::executor_type<stream>>
 169     , public asio::coroutine
 170 {
 171     boost::weak_ptr<impl_type> wp_;
 172     error_code result_; // must come before res_
 173     response_type& res_;
 174
 175 public:
 176     template<
 177         class Handler_,
 178         class Body, class Allocator,
 179         class Decorator>
 180     response_op(
 181         Handler_&& h,
 182         boost::shared_ptr<impl_type> const& sp,
 183         http::request<Body,
 184             http::basic_fields<Allocator>> const& req,
 185         Decorator const& decorator,
 186         bool cont = false)
 187         : stable_async_base<Handler,
 188             beast::executor_type<stream>>(
 189                 std::forward<Handler_>(h),
 190                     sp->stream().get_executor())
 191         , wp_(sp)
 192         , res_(beast::allocate_stable<response_type>(*this,
 193             sp->build_response(req, decorator, result_)))
 194     {
 195         (*this)({}, 0, cont);
 196     }
 197
 198     void operator()(
 199         error_code ec = {},
 200         std::size_t bytes_transferred = 0,
 201         bool cont = true)
 202     {
 203         boost::ignore_unused(bytes_transferred);
 204         auto sp = wp_.lock();
 205         if(! sp)
 206         {
 207             ec = net::error::operation_aborted;
 208             return this->complete(cont, ec);
 209         }
 210         auto& impl = *sp;
 211         BOOST_ASIO_CORO_REENTER(*this)
 212         {
 213             impl.change_status(status::handshake);
 214             impl.update_timer(this->get_executor());
 215
 216             // Send response
 217             BOOST_ASIO_CORO_YIELD
 218             http::async_write(
 219                 impl.stream(), res_, std::move(*this));
 220             if(impl.check_stop_now(ec))
 221                 goto upcall;
 222             if(! ec)
 223                 ec = result_;
 224             if(! ec)
 225             {
 226                 impl.do_pmd_config(res_);
 227                 impl.open(role_type::server);
 228             }
 229         upcall:
 230             this->complete(cont, ec);
 231         }
 232     }
 233 };
 234
 235 //------------------------------------------------------------------------------
 236
 237 // read and respond to an upgrade request
 238 //
 239 template<class NextLayer, bool deflateSupported>
 240 template<class Handler, class Decorator>
 241 class stream<NextLayer, deflateSupported>::accept_op
 242     : public beast::stable_async_base<
 243         Handler, beast::executor_type<stream>>
 244     , public asio::coroutine
 245 {
 246     boost::weak_ptr<impl_type> wp_;
 247     http::request_parser<http::empty_body>& p_;
 248     Decorator d_;
 249
 250 public:
 251     template<class Handler_, class Buffers>
 252     accept_op(
 253         Handler_&& h,
 254         boost::shared_ptr<impl_type> const& sp,
 255         Decorator const& decorator,
 256         Buffers const& buffers)
 257         : stable_async_base<Handler,
 258             beast::executor_type<stream>>(
 259                 std::forward<Handler_>(h),
 260                     sp->stream().get_executor())
 261         , wp_(sp)
 262         , p_(beast::allocate_stable<
 263             http::request_parser<http::empty_body>>(*this))
 264         , d_(decorator)
 265     {
 266         auto& impl = *sp;
 267         error_code ec;
 268         auto const mb =
 269             beast::detail::dynamic_buffer_prepare(
 270             impl.rd_buf, buffer_bytes(buffers),
 271                 ec, error::buffer_overflow);
 272         if(! ec)
 273             impl.rd_buf.commit(
 274                 net::buffer_copy(*mb, buffers));
 275         (*this)(ec);
 276     }
 277
 278     void operator()(
 279         error_code ec = {},
 280         std::size_t bytes_transferred = 0,
 281         bool cont = true)
 282     {
 283         boost::ignore_unused(bytes_transferred);
 284         auto sp = wp_.lock();
 285         if(! sp)
 286         {
 287             ec = net::error::operation_aborted;
 288             return this->complete(cont, ec);
 289         }
 290         auto& impl = *sp;
 291         BOOST_ASIO_CORO_REENTER(*this)
 292         {
 293             impl.change_status(status::handshake);
 294             impl.update_timer(this->get_executor());
 295
 296             // The constructor could have set ec
 297             if(ec)
 298                 goto upcall;
 299
 300             BOOST_ASIO_CORO_YIELD
 301             http::async_read(impl.stream(),
 302                 impl.rd_buf, p_, std::move(*this));
 303             if(ec == http::error::end_of_stream)
 304                 ec = error::closed;
 305             if(impl.check_stop_now(ec))
 306                 goto upcall;
 307
 308             {
 309                 // Arguments from our state must be
 310                 // moved to the stack before releasing
 311                 // the handler.
 312                 auto const req = p_.release();
 313                 auto const decorator = d_;
 314                 response_op<Handler>(
 315                     this->release_handler(),
 316                         sp, req, decorator, true);
 317                 return;
 318             }
 319
 320         upcall:
 321             this->complete(cont, ec);
 322         }
 323     }
 324 };
 325
 326 template<class NextLayer, bool deflateSupported>
 327 struct stream<NextLayer, deflateSupported>::
 328     run_response_op
 329 {
 330     template<
 331         class AcceptHandler,
 332         class Body, class Allocator,
 333         class Decorator>
 334     void
 335     operator()(
 336         AcceptHandler&& h,
 337         boost::shared_ptr<impl_type> const& sp,
 338         http::request<Body,
 339             http::basic_fields<Allocator>> const* m,
 340         Decorator const& d)
 341     {
 342         // If you get an error on the following line it means
 343         // that your handler does not meet the documented type
 344         // requirements for the handler.
 345
 346         static_assert(
 347             beast::detail::is_invocable<AcceptHandler,
 348                 void(error_code)>::value,
 349             "AcceptHandler type requirements not met");
 350
 351         response_op<
 352             typename std::decay<AcceptHandler>::type>(
 353                 std::forward<AcceptHandler>(h), sp, *m, d);
 354     }
 355 };
 356
 357 template<class NextLayer, bool deflateSupported>
 358 struct stream<NextLayer, deflateSupported>::
 359     run_accept_op
 360 {
 361     template<
 362         class AcceptHandler,
 363         class Decorator,
 364         class Buffers>
 365     void
 366     operator()(
 367         AcceptHandler&& h,
 368         boost::shared_ptr<impl_type> const& sp,
 369         Decorator const& d,
 370         Buffers const& b)
 371     {
 372         // If you get an error on the following line it means
 373         // that your handler does not meet the documented type
 374         // requirements for the handler.
 375
 376         static_assert(
 377             beast::detail::is_invocable<AcceptHandler,
 378                 void(error_code)>::value,
 379             "AcceptHandler type requirements not met");
 380
 381         accept_op<
 382             typename std::decay<AcceptHandler>::type,
 383             Decorator>(
 384                 std::forward<AcceptHandler>(h),
 385                 sp,
 386                 d,
 387                 b);
 388     }
 389 };
 390
 391 //------------------------------------------------------------------------------
 392
 393 template<class NextLayer, bool deflateSupported>
 394 template<class Body, class Allocator,
 395     class Decorator>
 396 void
 397 stream<NextLayer, deflateSupported>::
 398 do_accept(
 399     http::request<Body,
 400         http::basic_fields<Allocator>> const& req,
 401     Decorator const& decorator,
 402     error_code& ec)
 403 {
 404     impl_->change_status(status::handshake);
 405
 406     error_code result;
 407     auto const res = impl_->build_response(req, decorator, result);
 408     http::write(impl_->stream(), res, ec);
 409     if(ec)
 410         return;
 411     ec = result;
 412     if(ec)
 413     {
 414         // VFALCO TODO Respect keep alive setting, perform
 415         //             teardown if Connection: close.
 416         return;
 417     }
 418     impl_->do_pmd_config(res);
 419     impl_->open(role_type::server);
 420 }
 421
 422 template<class NextLayer, bool deflateSupported>
 423 template<class Buffers, class Decorator>
 424 void
 425 stream<NextLayer, deflateSupported>::
 426 do_accept(
 427     Buffers const& buffers,
 428     Decorator const& decorator,
 429     error_code& ec)
 430 {
 431     impl_->reset();
 432     auto const mb =
 433         beast::detail::dynamic_buffer_prepare(
 434         impl_->rd_buf, buffer_bytes(buffers), ec,
 435             error::buffer_overflow);
 436     if(ec)
 437         return;
 438     impl_->rd_buf.commit(net::buffer_copy(*mb, buffers));
 439
 440     http::request_parser<http::empty_body> p;
 441     http::read(next_layer(), impl_->rd_buf, p, ec);
 442     if(ec == http::error::end_of_stream)
 443         ec = error::closed;
 444     if(ec)
 445         return;
 446     do_accept(p.get(), decorator, ec);
 447 }
 448
 449 //------------------------------------------------------------------------------
 450
 451 template<class NextLayer, bool deflateSupported>
 452 void
 453 stream<NextLayer, deflateSupported>::
 454 accept()
 455 {
 456     static_assert(is_sync_stream<next_layer_type>::value,
 457         "SyncStream type requirements not met");
 458     error_code ec;
 459     accept(ec);
 460     if(ec)
 461         BOOST_THROW_EXCEPTION(system_error{ec});
 462 }
 463
 464 template<class NextLayer, bool deflateSupported>
 465 void
 466 stream<NextLayer, deflateSupported>::
 467 accept(error_code& ec)
 468 {
 469     static_assert(is_sync_stream<next_layer_type>::value,
 470         "SyncStream type requirements not met");
 471     do_accept(
 472         net::const_buffer{},
 473         &default_decorate_res, ec);
 474 }
 475
 476 template<class NextLayer, bool deflateSupported>
 477 template<class ConstBufferSequence>
 478 typename std::enable_if<! http::detail::is_header<
 479     ConstBufferSequence>::value>::type
 480 stream<NextLayer, deflateSupported>::
 481 accept(ConstBufferSequence const& buffers)
 482 {
 483     static_assert(is_sync_stream<next_layer_type>::value,
 484         "SyncStream type requirements not met");
 485     static_assert(net::is_const_buffer_sequence<
 486         ConstBufferSequence>::value,
 487             "ConstBufferSequence type requirements not met");
 488     error_code ec;
 489     accept(buffers, ec);
 490     if(ec)
 491         BOOST_THROW_EXCEPTION(system_error{ec});
 492 }
 493 template<class NextLayer, bool deflateSupported>
 494 template<class ConstBufferSequence>
 495 typename std::enable_if<! http::detail::is_header<
 496     ConstBufferSequence>::value>::type
 497 stream<NextLayer, deflateSupported>::
 498 accept(
 499     ConstBufferSequence const& buffers, error_code& ec)
 500 {
 501     static_assert(is_sync_stream<next_layer_type>::value,
 502         "SyncStream type requirements not met");
 503     static_assert(net::is_const_buffer_sequence<
 504         ConstBufferSequence>::value,
 505             "ConstBufferSequence type requirements not met");
 506     do_accept(buffers, &default_decorate_res, ec);
 507 }
 508
 509
 510 template<class NextLayer, bool deflateSupported>
 511 template<class Body, class Allocator>
 512 void
 513 stream<NextLayer, deflateSupported>::
 514 accept(
 515     http::request<Body,
 516         http::basic_fields<Allocator>> const& req)
 517 {
 518     static_assert(is_sync_stream<next_layer_type>::value,
 519         "SyncStream type requirements not met");
 520     error_code ec;
 521     accept(req, ec);
 522     if(ec)
 523         BOOST_THROW_EXCEPTION(system_error{ec});
 524 }
 525
 526 template<class NextLayer, bool deflateSupported>
 527 template<class Body, class Allocator>
 528 void
 529 stream<NextLayer, deflateSupported>::
 530 accept(
 531     http::request<Body,
 532         http::basic_fields<Allocator>> const& req,
 533     error_code& ec)
 534 {
 535     static_assert(is_sync_stream<next_layer_type>::value,
 536         "SyncStream type requirements not met");
 537     impl_->reset();
 538     do_accept(req, &default_decorate_res, ec);
 539 }
 540
 541 //------------------------------------------------------------------------------
 542
 543 template<class NextLayer, bool deflateSupported>
 544 template<
 545     class AcceptHandler>
 546 BOOST_BEAST_ASYNC_RESULT1(AcceptHandler)
 547 stream<NextLayer, deflateSupported>::
 548 async_accept(
 549     AcceptHandler&& handler)
 550 {
 551     static_assert(is_async_stream<next_layer_type>::value,
 552         "AsyncStream type requirements not met");
 553     impl_->reset();
 554     return net::async_initiate<
 555         AcceptHandler,
 556         void(error_code)>(
 557             run_accept_op{},
 558             handler,
 559             impl_,
 560             &default_decorate_res,
 561             net::const_buffer{});
 562 }
 563
 564 template<class NextLayer, bool deflateSupported>
 565 template<
 566     class ResponseDecorator,
 567     class AcceptHandler>
 568 BOOST_BEAST_ASYNC_RESULT1(AcceptHandler)
 569 stream<NextLayer, deflateSupported>::
 570 async_accept_ex(
 571     ResponseDecorator const& decorator,
 572     AcceptHandler&& handler)
 573 {
 574     static_assert(is_async_stream<next_layer_type>::value,
 575         "AsyncStream type requirements not met");
 576     static_assert(detail::is_response_decorator<
 577         ResponseDecorator>::value,
 578             "ResponseDecorator requirements not met");
 579     impl_->reset();
 580     return net::async_initiate<
 581         AcceptHandler,
 582         void(error_code)>(
 583             run_accept_op{},
 584             handler,
 585             impl_,
 586             decorator,
 587             net::const_buffer{});
 588 }
 589
 590 template<class NextLayer, bool deflateSupported>
 591 template<
 592     class ConstBufferSequence,
 593     class AcceptHandler>
 594 BOOST_BEAST_ASYNC_RESULT1(AcceptHandler)
 595 stream<NextLayer, deflateSupported>::
 596 async_accept(
 597     ConstBufferSequence const& buffers,
 598     AcceptHandler&& handler,
 599     typename std::enable_if<
 600         ! http::detail::is_header<
 601         ConstBufferSequence>::value>::type*
 602 )
 603 {
 604     static_assert(is_async_stream<next_layer_type>::value,
 605         "AsyncStream type requirements not met");
 606     static_assert(net::is_const_buffer_sequence<
 607         ConstBufferSequence>::value,
 608             "ConstBufferSequence type requirements not met");
 609     impl_->reset();
 610     return net::async_initiate<
 611         AcceptHandler,
 612         void(error_code)>(
 613             run_accept_op{},
 614             handler,
 615             impl_,
 616             &default_decorate_res,
 617             buffers);
 618 }
 619
 620 template<class NextLayer, bool deflateSupported>
 621 template<
 622     class ConstBufferSequence,
 623     class ResponseDecorator,
 624     class AcceptHandler>
 625 BOOST_BEAST_ASYNC_RESULT1(AcceptHandler)
 626 stream<NextLayer, deflateSupported>::
 627 async_accept_ex(
 628     ConstBufferSequence const& buffers,
 629     ResponseDecorator const& decorator,
 630     AcceptHandler&& handler,
 631     typename std::enable_if<
 632         ! http::detail::is_header<
 633         ConstBufferSequence>::value>::type*)
 634 {
 635     static_assert(is_async_stream<next_layer_type>::value,
 636         "AsyncStream type requirements not met");
 637     static_assert(net::is_const_buffer_sequence<
 638         ConstBufferSequence>::value,
 639             "ConstBufferSequence type requirements not met");
 640     static_assert(detail::is_response_decorator<
 641         ResponseDecorator>::value,
 642             "ResponseDecorator requirements not met");
 643     impl_->reset();
 644     return net::async_initiate<
 645         AcceptHandler,
 646         void(error_code)>(
 647             run_accept_op{},
 648             handler,
 649             impl_,
 650             decorator,
 651             buffers);
 652 }
 653
 654 template<class NextLayer, bool deflateSupported>
 655 template<
 656     class Body, class Allocator,
 657     class AcceptHandler>
 658 BOOST_BEAST_ASYNC_RESULT1(AcceptHandler)
 659 stream<NextLayer, deflateSupported>::
 660 async_accept(
 661     http::request<Body, http::basic_fields<Allocator>> const& req,
 662     AcceptHandler&& handler)
 663 {
 664     static_assert(is_async_stream<next_layer_type>::value,
 665         "AsyncStream type requirements not met");
 666     impl_->reset();
 667     return net::async_initiate<
 668         AcceptHandler,
 669         void(error_code)>(
 670             run_response_op{},
 671             handler,
 672             impl_,
 673             &req,
 674             &default_decorate_res);
 675 }
 676
 677 template<class NextLayer, bool deflateSupported>
 678 template<
 679     class Body, class Allocator,
 680     class ResponseDecorator,
 681     class AcceptHandler>
 682 BOOST_BEAST_ASYNC_RESULT1(AcceptHandler)
 683 stream<NextLayer, deflateSupported>::
 684 async_accept_ex(
 685     http::request<Body, http::basic_fields<Allocator>> const& req,
 686     ResponseDecorator const& decorator,
 687     AcceptHandler&& handler)
 688 {
 689     static_assert(is_async_stream<next_layer_type>::value,
 690         "AsyncStream type requirements not met");
 691     static_assert(detail::is_response_decorator<
 692         ResponseDecorator>::value,
 693             "ResponseDecorator requirements not met");
 694     impl_->reset();
 695     return net::async_initiate<
 696         AcceptHandler,
 697         void(error_code)>(
 698             run_response_op{},
 699             handler,
 700             impl_,
 701             &req,
 702             decorator);
 703 }
 704
 705 //------------------------------------------------------------------------------
 706
 707 template<class NextLayer, bool deflateSupported>
 708 template<class ResponseDecorator>
 709 void
 710 stream<NextLayer, deflateSupported>::
 711 accept_ex(ResponseDecorator const& decorator)
 712 {
 713 #ifndef BOOST_BEAST_ALLOW_DEPRECATED
 714     static_assert(sizeof(ResponseDecorator) == 0,
 715         BOOST_BEAST_DEPRECATION_STRING);
 716 #endif
 717     static_assert(is_sync_stream<next_layer_type>::value,
 718         "SyncStream type requirements not met");
 719     static_assert(detail::is_response_decorator<
 720         ResponseDecorator>::value,
 721             "ResponseDecorator requirements not met");
 722     error_code ec;
 723     accept_ex(decorator, ec);
 724     if(ec)
 725         BOOST_THROW_EXCEPTION(system_error{ec});
 726 }
 727
 728 template<class NextLayer, bool deflateSupported>
 729 template<class ResponseDecorator>
 730 void
 731 stream<NextLayer, deflateSupported>::
 732 accept_ex(ResponseDecorator const& decorator, error_code& ec)
 733 {
 734 #ifndef BOOST_BEAST_ALLOW_DEPRECATED
 735     static_assert(sizeof(ResponseDecorator) == 0,
 736         BOOST_BEAST_DEPRECATION_STRING);
 737 #endif
 738     static_assert(is_sync_stream<next_layer_type>::value,
 739         "SyncStream type requirements not met");
 740     static_assert(detail::is_response_decorator<
 741         ResponseDecorator>::value,
 742             "ResponseDecorator requirements not met");
 743     do_accept(
 744         net::const_buffer{},
 745         decorator, ec);
 746 }
 747
 748 template<class NextLayer, bool deflateSupported>
 749 template<
 750     class ConstBufferSequence,
 751     class ResponseDecorator>
 752 typename std::enable_if<! http::detail::is_header<
 753     ConstBufferSequence>::value>::type
 754 stream<NextLayer, deflateSupported>::
 755 accept_ex(
 756     ConstBufferSequence const& buffers,
 757     ResponseDecorator const &decorator)
 758 {
 759 #ifndef BOOST_BEAST_ALLOW_DEPRECATED
 760     static_assert(sizeof(ResponseDecorator) == 0,
 761         BOOST_BEAST_DEPRECATION_STRING);
 762 #endif
 763     static_assert(is_sync_stream<next_layer_type>::value,
 764         "SyncStream type requirements not met");
 765     static_assert(net::is_const_buffer_sequence<
 766         ConstBufferSequence>::value,
 767             "ConstBufferSequence type requirements not met");
 768     static_assert(detail::is_response_decorator<
 769         ResponseDecorator>::value,
 770             "ResponseDecorator requirements not met");
 771     error_code ec;
 772     accept_ex(buffers, decorator, ec);
 773     if(ec)
 774         BOOST_THROW_EXCEPTION(system_error{ec});
 775 }
 776
 777 template<class NextLayer, bool deflateSupported>
 778 template<
 779     class ConstBufferSequence,
 780     class ResponseDecorator>
 781 typename std::enable_if<! http::detail::is_header<
 782     ConstBufferSequence>::value>::type
 783 stream<NextLayer, deflateSupported>::
 784 accept_ex(
 785     ConstBufferSequence const& buffers,
 786     ResponseDecorator const& decorator,
 787     error_code& ec)
 788 {
 789 #ifndef BOOST_BEAST_ALLOW_DEPRECATED
 790     static_assert(sizeof(ResponseDecorator) == 0,
 791         BOOST_BEAST_DEPRECATION_STRING);
 792 #endif
 793     static_assert(is_sync_stream<next_layer_type>::value,
 794         "SyncStream type requirements not met");
 795     static_assert(net::is_const_buffer_sequence<
 796         ConstBufferSequence>::value,
 797             "ConstBufferSequence type requirements not met");
 798     static_assert(net::is_const_buffer_sequence<
 799         ConstBufferSequence>::value,
 800             "ConstBufferSequence type requirements not met");
 801     do_accept(buffers, decorator, ec);
 802 }
 803
 804 template<class NextLayer, bool deflateSupported>
 805 template<
 806     class Body, class Allocator,
 807     class ResponseDecorator>
 808 void
 809 stream<NextLayer, deflateSupported>::
 810 accept_ex(
 811     http::request<Body,
 812         http::basic_fields<Allocator>> const& req,
 813     ResponseDecorator const& decorator)
 814 {
 815 #ifndef BOOST_BEAST_ALLOW_DEPRECATED
 816     static_assert(sizeof(ResponseDecorator) == 0,
 817         BOOST_BEAST_DEPRECATION_STRING);
 818 #endif
 819     static_assert(is_sync_stream<next_layer_type>::value,
 820         "SyncStream type requirements not met");
 821     static_assert(detail::is_response_decorator<
 822         ResponseDecorator>::value,
 823             "ResponseDecorator requirements not met");
 824     error_code ec;
 825     accept_ex(req, decorator, ec);
 826     if(ec)
 827         BOOST_THROW_EXCEPTION(system_error{ec});
 828 }
 829
 830 template<class NextLayer, bool deflateSupported>
 831 template<
 832     class Body, class Allocator,
 833     class ResponseDecorator>
 834 void
 835 stream<NextLayer, deflateSupported>::
 836 accept_ex(
 837     http::request<Body,
 838         http::basic_fields<Allocator>> const& req,
 839     ResponseDecorator const& decorator,
 840     error_code& ec)
 841 {
 842 #ifndef BOOST_BEAST_ALLOW_DEPRECATED
 843     static_assert(sizeof(ResponseDecorator) == 0,
 844         BOOST_BEAST_DEPRECATION_STRING);
 845 #endif
 846     static_assert(is_sync_stream<next_layer_type>::value,
 847         "SyncStream type requirements not met");
 848     static_assert(detail::is_response_decorator<
 849         ResponseDecorator>::value,
 850             "ResponseDecorator requirements not met");
 851     impl_->reset();
 852     do_accept(req, decorator, ec);
 853 }
 854
 855 } // websocket
 856 } // beast
 857 } // boost
 858
 859 #endif