forked from boostorg/beast
644 lines
20 KiB
C++
644 lines
20 KiB
C++
//
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// Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// Official repository: https://github.com/boostorg/beast
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//
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#ifndef BOOST_BEAST_WEBSOCKET_IMPL_ACCEPT_IPP
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#define BOOST_BEAST_WEBSOCKET_IMPL_ACCEPT_IPP
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#include <boost/beast/core/buffer_size.hpp>
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#include <boost/beast/websocket/detail/type_traits.hpp>
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#include <boost/beast/http/empty_body.hpp>
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#include <boost/beast/http/parser.hpp>
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#include <boost/beast/http/read.hpp>
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#include <boost/beast/http/string_body.hpp>
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#include <boost/beast/http/write.hpp>
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#include <boost/beast/core/async_op_base.hpp>
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#include <boost/beast/core/buffers_prefix.hpp>
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#include <boost/beast/core/detail/buffer.hpp>
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#include <boost/beast/core/detail/get_executor_type.hpp>
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#include <boost/beast/core/detail/type_traits.hpp>
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#include <boost/asio/coroutine.hpp>
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#include <boost/asio/post.hpp>
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#include <boost/assert.hpp>
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#include <boost/throw_exception.hpp>
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#include <memory>
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#include <type_traits>
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namespace boost {
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namespace beast {
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namespace websocket {
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/** Respond to an HTTP request
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*/
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template<class NextLayer, bool deflateSupported>
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template<class Handler>
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class stream<NextLayer, deflateSupported>::response_op
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: public beast::stable_async_op_base<
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Handler, beast::detail::get_executor_type<stream>>
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, public net::coroutine
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{
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stream<NextLayer, deflateSupported>& ws_;
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error_code result_; // must come before res_
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response_type& res_;
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public:
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template<
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class Handler_,
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class Body, class Allocator,
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class Decorator>
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response_op(
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Handler_&& h,
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stream<NextLayer, deflateSupported>& ws,
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http::request<Body, http::basic_fields<Allocator>> const& req,
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Decorator const& decorator)
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: stable_async_op_base<
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Handler, beast::detail::get_executor_type<stream>>(
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std::forward<Handler_>(h), ws.get_executor())
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, ws_(ws)
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, res_(beast::allocate_stable<response_type>(*this,
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ws.build_response(req, decorator, result_)))
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{
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}
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void operator()(
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error_code ec = {},
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std::size_t bytes_transferred = 0)
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{
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boost::ignore_unused(bytes_transferred);
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BOOST_ASIO_CORO_REENTER(*this)
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{
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// Send response
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BOOST_ASIO_CORO_YIELD
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http::async_write(
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ws_.next_layer(), res_, std::move(*this));
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if(! ec)
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ec = result_;
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if(! ec)
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{
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ws_.impl_->do_pmd_config(res_);
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ws_.impl_->open(role_type::server);
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}
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this->invoke(ec);
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}
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}
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};
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//------------------------------------------------------------------------------
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// read and respond to an upgrade request
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//
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template<class NextLayer, bool deflateSupported>
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template<class Decorator, class Handler>
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class stream<NextLayer, deflateSupported>::accept_op
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: public beast::stable_async_op_base<
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Handler, beast::detail::get_executor_type<stream>>
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, public net::coroutine
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{
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stream<NextLayer, deflateSupported>& ws_;
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http::request_parser<http::empty_body>& p_;
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Decorator d_;
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public:
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template<class Handler_>
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accept_op(
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Handler_&& h,
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stream<NextLayer, deflateSupported>& ws,
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Decorator const& decorator)
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: stable_async_op_base<
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Handler, beast::detail::get_executor_type<stream>>(
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std::forward<Handler_>(h), ws.get_executor())
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, ws_(ws)
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, p_(beast::allocate_stable<
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http::request_parser<http::empty_body>>(*this))
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, d_(decorator)
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{
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}
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template<class Buffers>
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void run(Buffers const& buffers)
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{
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error_code ec;
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auto const mb = beast::detail::dynamic_buffer_prepare(
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ws_.impl_->rd_buf, buffer_size(buffers), ec,
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error::buffer_overflow);
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if(ec)
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return (*this)(ec);
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ws_.impl_->rd_buf.commit(net::buffer_copy(*mb, buffers));
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(*this)(ec);
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}
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void operator()(
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error_code ec = {},
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std::size_t bytes_transferred = 0)
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{
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boost::ignore_unused(bytes_transferred);
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BOOST_ASIO_CORO_REENTER(*this)
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{
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if(ec)
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{
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BOOST_ASIO_CORO_YIELD
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net::post(
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ws_.get_executor(),
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beast::bind_front_handler(std::move(*this), ec));
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}
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else
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{
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BOOST_ASIO_CORO_YIELD
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http::async_read(
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ws_.next_layer(), ws_.impl_->rd_buf,
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p_, std::move(*this));
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if(ec == http::error::end_of_stream)
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ec = error::closed;
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if(! ec)
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{
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// Arguments from our state must be
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// moved to the stack before releasing
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// the handler.
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auto& ws = ws_;
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auto const req = p_.release();
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auto const decorator = d_;
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#if 1
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return response_op<Handler>{
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this->release_handler(),
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ws, req, decorator}(ec);
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#else
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// VFALCO This *should* work but breaks
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// coroutine invariants in the unit test.
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// Also it calls reset() when it shouldn't.
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return ws.async_accept_ex(
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req, decorator, this->release_handler());
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#endif
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}
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}
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this->invoke(ec);
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}
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}
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};
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//------------------------------------------------------------------------------
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template<class NextLayer, bool deflateSupported>
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void
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stream<NextLayer, deflateSupported>::
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accept()
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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error_code ec;
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accept(ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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}
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template<class NextLayer, bool deflateSupported>
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template<class ResponseDecorator>
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void
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stream<NextLayer, deflateSupported>::
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accept_ex(ResponseDecorator const& decorator)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(detail::is_response_decorator<
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ResponseDecorator>::value,
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"ResponseDecorator requirements not met");
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error_code ec;
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accept_ex(decorator, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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}
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template<class NextLayer, bool deflateSupported>
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void
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stream<NextLayer, deflateSupported>::
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accept(error_code& ec)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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impl_->reset();
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do_accept(&default_decorate_res, ec);
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}
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template<class NextLayer, bool deflateSupported>
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template<class ResponseDecorator>
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void
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stream<NextLayer, deflateSupported>::
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accept_ex(ResponseDecorator const& decorator, error_code& ec)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(detail::is_response_decorator<
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ResponseDecorator>::value,
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"ResponseDecorator requirements not met");
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impl_->reset();
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do_accept(decorator, ec);
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}
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template<class NextLayer, bool deflateSupported>
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template<class ConstBufferSequence>
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typename std::enable_if<! http::detail::is_header<
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ConstBufferSequence>::value>::type
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stream<NextLayer, deflateSupported>::
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accept(ConstBufferSequence const& buffers)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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error_code ec;
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accept(buffers, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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}
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template<class NextLayer, bool deflateSupported>
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template<
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class ConstBufferSequence,
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class ResponseDecorator>
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typename std::enable_if<! http::detail::is_header<
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ConstBufferSequence>::value>::type
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stream<NextLayer, deflateSupported>::
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accept_ex(
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ConstBufferSequence const& buffers,
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ResponseDecorator const &decorator)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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static_assert(detail::is_response_decorator<
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ResponseDecorator>::value,
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"ResponseDecorator requirements not met");
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error_code ec;
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accept_ex(buffers, decorator, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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}
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template<class NextLayer, bool deflateSupported>
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template<class ConstBufferSequence>
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typename std::enable_if<! http::detail::is_header<
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ConstBufferSequence>::value>::type
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stream<NextLayer, deflateSupported>::
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accept(
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ConstBufferSequence const& buffers, error_code& ec)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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impl_->reset();
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auto const mb = beast::detail::dynamic_buffer_prepare(
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impl_->rd_buf, buffer_size(buffers), ec,
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error::buffer_overflow);
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if(ec)
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return;
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impl_->rd_buf.commit(net::buffer_copy(*mb, buffers));
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do_accept(&default_decorate_res, ec);
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}
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template<class NextLayer, bool deflateSupported>
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template<
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class ConstBufferSequence,
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class ResponseDecorator>
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typename std::enable_if<! http::detail::is_header<
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ConstBufferSequence>::value>::type
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stream<NextLayer, deflateSupported>::
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accept_ex(
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ConstBufferSequence const& buffers,
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ResponseDecorator const& decorator,
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error_code& ec)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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impl_->reset();
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auto const mb = beast::detail::dynamic_buffer_prepare(
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impl_->rd_buf, buffer_size(buffers), ec,
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error::buffer_overflow);
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if(ec)
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return;
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impl_->rd_buf.commit(net::buffer_copy(*mb, buffers));
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do_accept(decorator, ec);
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}
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template<class NextLayer, bool deflateSupported>
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template<class Body, class Allocator>
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void
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stream<NextLayer, deflateSupported>::
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accept(
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http::request<Body,
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http::basic_fields<Allocator>> const& req)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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error_code ec;
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accept(req, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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}
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template<class NextLayer, bool deflateSupported>
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template<
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class Body, class Allocator,
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class ResponseDecorator>
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void
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stream<NextLayer, deflateSupported>::
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accept_ex(
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http::request<Body,
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http::basic_fields<Allocator>> const& req,
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ResponseDecorator const& decorator)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(detail::is_response_decorator<
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ResponseDecorator>::value,
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"ResponseDecorator requirements not met");
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error_code ec;
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accept_ex(req, decorator, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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}
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template<class NextLayer, bool deflateSupported>
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template<class Body, class Allocator>
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void
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stream<NextLayer, deflateSupported>::
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accept(
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http::request<Body,
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http::basic_fields<Allocator>> const& req,
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error_code& ec)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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impl_->reset();
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do_accept(req, &default_decorate_res, ec);
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}
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template<class NextLayer, bool deflateSupported>
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template<
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class Body, class Allocator,
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class ResponseDecorator>
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void
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stream<NextLayer, deflateSupported>::
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accept_ex(
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http::request<Body,
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http::basic_fields<Allocator>> const& req,
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ResponseDecorator const& decorator,
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error_code& ec)
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{
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(detail::is_response_decorator<
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ResponseDecorator>::value,
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"ResponseDecorator requirements not met");
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impl_->reset();
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do_accept(req, decorator, ec);
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}
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//------------------------------------------------------------------------------
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template<class NextLayer, bool deflateSupported>
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template<
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class AcceptHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE(
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AcceptHandler, void(error_code))
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stream<NextLayer, deflateSupported>::
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async_accept(
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AcceptHandler&& handler)
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{
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static_assert(is_async_stream<next_layer_type>::value,
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"AsyncStream requirements not met");
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BOOST_BEAST_HANDLER_INIT(
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AcceptHandler, void(error_code));
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impl_->reset();
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accept_op<
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decltype(&default_decorate_res),
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BOOST_ASIO_HANDLER_TYPE(
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AcceptHandler, void(error_code))>{
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std::move(init.completion_handler),
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*this,
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&default_decorate_res}({});
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return init.result.get();
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}
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template<class NextLayer, bool deflateSupported>
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template<
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class ResponseDecorator,
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class AcceptHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE(
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AcceptHandler, void(error_code))
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stream<NextLayer, deflateSupported>::
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async_accept_ex(
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ResponseDecorator const& decorator,
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AcceptHandler&& handler)
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{
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static_assert(is_async_stream<next_layer_type>::value,
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"AsyncStream requirements not met");
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static_assert(detail::is_response_decorator<
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ResponseDecorator>::value,
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"ResponseDecorator requirements not met");
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BOOST_BEAST_HANDLER_INIT(
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AcceptHandler, void(error_code));
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impl_->reset();
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accept_op<
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ResponseDecorator,
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BOOST_ASIO_HANDLER_TYPE(
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AcceptHandler, void(error_code))>{
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std::move(init.completion_handler),
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*this,
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decorator}({});
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return init.result.get();
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}
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template<class NextLayer, bool deflateSupported>
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template<
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class ConstBufferSequence,
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class AcceptHandler>
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typename std::enable_if<
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! http::detail::is_header<ConstBufferSequence>::value,
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BOOST_ASIO_INITFN_RESULT_TYPE(
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AcceptHandler, void(error_code))>::type
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stream<NextLayer, deflateSupported>::
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async_accept(
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ConstBufferSequence const& buffers,
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AcceptHandler&& handler)
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{
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static_assert(is_async_stream<next_layer_type>::value,
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"AsyncStream requirements not met");
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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BOOST_BEAST_HANDLER_INIT(
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AcceptHandler, void(error_code));
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impl_->reset();
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accept_op<
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decltype(&default_decorate_res),
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BOOST_ASIO_HANDLER_TYPE(
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AcceptHandler, void(error_code))>{
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std::move(init.completion_handler),
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*this,
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&default_decorate_res}.run(buffers);
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return init.result.get();
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}
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template<class NextLayer, bool deflateSupported>
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template<
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class ConstBufferSequence,
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class ResponseDecorator,
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class AcceptHandler>
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typename std::enable_if<
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! http::detail::is_header<ConstBufferSequence>::value,
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BOOST_ASIO_INITFN_RESULT_TYPE(
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AcceptHandler, void(error_code))>::type
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stream<NextLayer, deflateSupported>::
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async_accept_ex(
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ConstBufferSequence const& buffers,
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ResponseDecorator const& decorator,
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AcceptHandler&& handler)
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{
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static_assert(is_async_stream<next_layer_type>::value,
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"AsyncStream requirements not met");
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static_assert(net::is_const_buffer_sequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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static_assert(detail::is_response_decorator<
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ResponseDecorator>::value,
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"ResponseDecorator requirements not met");
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BOOST_BEAST_HANDLER_INIT(
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AcceptHandler, void(error_code));
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impl_->reset();
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accept_op<
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ResponseDecorator,
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BOOST_ASIO_HANDLER_TYPE(
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AcceptHandler, void(error_code))>{
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std::move(init.completion_handler),
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*this,
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decorator}.run(buffers);
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return init.result.get();
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}
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|
|
template<class NextLayer, bool deflateSupported>
|
|
template<
|
|
class Body, class Allocator,
|
|
class AcceptHandler>
|
|
BOOST_ASIO_INITFN_RESULT_TYPE(
|
|
AcceptHandler, void(error_code))
|
|
stream<NextLayer, deflateSupported>::
|
|
async_accept(
|
|
http::request<Body, http::basic_fields<Allocator>> const& req,
|
|
AcceptHandler&& handler)
|
|
{
|
|
static_assert(is_async_stream<next_layer_type>::value,
|
|
"AsyncStream requirements not met");
|
|
BOOST_BEAST_HANDLER_INIT(
|
|
AcceptHandler, void(error_code));
|
|
impl_->reset();
|
|
using net::asio_handler_is_continuation;
|
|
response_op<
|
|
BOOST_ASIO_HANDLER_TYPE(
|
|
AcceptHandler, void(error_code))>{
|
|
std::move(init.completion_handler),
|
|
*this,
|
|
req,
|
|
&default_decorate_res}();
|
|
return init.result.get();
|
|
}
|
|
|
|
template<class NextLayer, bool deflateSupported>
|
|
template<
|
|
class Body, class Allocator,
|
|
class ResponseDecorator,
|
|
class AcceptHandler>
|
|
BOOST_ASIO_INITFN_RESULT_TYPE(
|
|
AcceptHandler, void(error_code))
|
|
stream<NextLayer, deflateSupported>::
|
|
async_accept_ex(
|
|
http::request<Body, http::basic_fields<Allocator>> const& req,
|
|
ResponseDecorator const& decorator,
|
|
AcceptHandler&& handler)
|
|
{
|
|
static_assert(is_async_stream<next_layer_type>::value,
|
|
"AsyncStream requirements not met");
|
|
static_assert(detail::is_response_decorator<
|
|
ResponseDecorator>::value,
|
|
"ResponseDecorator requirements not met");
|
|
BOOST_BEAST_HANDLER_INIT(
|
|
AcceptHandler, void(error_code));
|
|
impl_->reset();
|
|
using net::asio_handler_is_continuation;
|
|
response_op<
|
|
BOOST_ASIO_HANDLER_TYPE(
|
|
AcceptHandler, void(error_code))>{
|
|
std::move(init.completion_handler),
|
|
*this,
|
|
req,
|
|
decorator}();
|
|
return init.result.get();
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
template<class NextLayer, bool deflateSupported>
|
|
template<class Decorator>
|
|
void
|
|
stream<NextLayer, deflateSupported>::
|
|
do_accept(
|
|
Decorator const& decorator,
|
|
error_code& ec)
|
|
{
|
|
http::request_parser<http::empty_body> p;
|
|
http::read(next_layer(), impl_->rd_buf, p, ec);
|
|
if(ec == http::error::end_of_stream)
|
|
ec = error::closed;
|
|
if(ec)
|
|
return;
|
|
do_accept(p.get(), decorator, ec);
|
|
}
|
|
|
|
template<class NextLayer, bool deflateSupported>
|
|
template<class Body, class Allocator,
|
|
class Decorator>
|
|
void
|
|
stream<NextLayer, deflateSupported>::
|
|
do_accept(
|
|
http::request<Body,
|
|
http::basic_fields<Allocator>> const& req,
|
|
Decorator const& decorator,
|
|
error_code& ec)
|
|
{
|
|
error_code result;
|
|
auto const res = build_response(req, decorator, result);
|
|
http::write(impl_->stream, res, ec);
|
|
if(ec)
|
|
return;
|
|
ec = result;
|
|
if(ec)
|
|
{
|
|
// VFALCO TODO Respect keep alive setting, perform
|
|
// teardown if Connection: close.
|
|
return;
|
|
}
|
|
impl_->do_pmd_config(res);
|
|
impl_->open(role_type::server);
|
|
}
|
|
|
|
} // websocket
|
|
} // beast
|
|
} // boost
|
|
|
|
#endif
|