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140 lines
3.4 KiB
C++
140 lines
3.4 KiB
C++
//
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// Copyright (c) 2013-2016 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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#ifndef BEAST_WEBSOCKET_IMPL_RESPONSE_OP_HPP
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#define BEAST_WEBSOCKET_IMPL_RESPONSE_OP_HPP
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#include <beast/http/message_v1.hpp>
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#include <beast/http/string_body.hpp>
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#include <beast/http/write.hpp>
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#include <beast/core/handler_alloc.hpp>
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#include <memory>
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namespace beast {
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namespace websocket {
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// Respond to an upgrade HTTP request
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template<class NextLayer>
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template<class Handler>
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class stream<NextLayer>::response_op
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{
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using alloc_type =
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handler_alloc<char, Handler>;
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struct data
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{
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stream<NextLayer>& ws;
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http::response_v1<http::string_body> resp;
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Handler h;
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error_code final_ec;
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bool cont;
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int state = 0;
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template<class DeducedHandler,
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class Body, class Headers>
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data(DeducedHandler&& h_, stream<NextLayer>& ws_,
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http::request_v1<Body, Headers> const& req,
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bool cont_)
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: ws(ws_)
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, resp(ws_.build_response(req))
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, h(std::forward<DeducedHandler>(h_))
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, cont(cont_)
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{
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// can't call stream::reset() here
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// otherwise accept_op will malfunction
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//
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if(resp.status != 101)
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final_ec = error::handshake_failed;
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}
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};
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std::shared_ptr<data> d_;
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public:
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response_op(response_op&&) = default;
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response_op(response_op const&) = default;
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template<class DeducedHandler, class... Args>
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response_op(DeducedHandler&& h,
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stream<NextLayer>& ws, Args&&... args)
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: d_(std::allocate_shared<data>(alloc_type{h},
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std::forward<DeducedHandler>(h), ws,
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std::forward<Args>(args)...))
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{
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(*this)(error_code{}, false);
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}
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void operator()(
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error_code ec, bool again = true);
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friend
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void* asio_handler_allocate(
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std::size_t size, response_op* op)
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{
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return boost_asio_handler_alloc_helpers::
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allocate(size, op->d_->h);
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}
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friend
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void asio_handler_deallocate(
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void* p, std::size_t size, response_op* op)
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{
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return boost_asio_handler_alloc_helpers::
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deallocate(p, size, op->d_->h);
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}
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friend
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bool asio_handler_is_continuation(response_op* op)
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{
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return op->d_->cont;
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}
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template<class Function>
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friend
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void asio_handler_invoke(Function&& f, response_op* op)
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{
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return boost_asio_handler_invoke_helpers::
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invoke(f, op->d_->h);
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}
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};
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template<class NextLayer>
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template<class Handler>
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void
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stream<NextLayer>::response_op<Handler>::
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operator()(error_code ec, bool again)
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{
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auto& d = *d_;
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d.cont = d.cont || again;
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while(! ec && d.state != 99)
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{
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switch(d.state)
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{
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case 0:
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// send response
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d.state = 1;
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http::async_write(d.ws.next_layer(),
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d.resp, std::move(*this));
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return;
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// sent response
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case 1:
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d.state = 99;
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ec = d.final_ec;
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if(! ec)
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d.ws.open(detail::role_type::server);
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break;
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}
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}
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d.h(ec);
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}
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} // websocket
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} // beast
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#endif
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