forked from boostorg/beast
364 lines
11 KiB
C++
364 lines
11 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_HANDSHAKE_HPP
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#define BOOST_BEAST_WEBSOCKET_IMPL_HANDSHAKE_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/message.hpp>
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#include <boost/beast/http/read.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/stream_traits.hpp>
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#include <boost/asio/coroutine.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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namespace boost {
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namespace beast {
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namespace websocket {
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//------------------------------------------------------------------------------
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// send the upgrade request and process the response
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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>::handshake_op
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: public beast::stable_async_op_base<Handler,
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beast::executor_type<stream>>
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, public net::coroutine
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{
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struct data
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{
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// VFALCO This really should be two separate
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// composed operations, to save on memory
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http::request<http::empty_body> req;
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response_type res;
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};
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stream<NextLayer, deflateSupported>& ws_;
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detail::sec_ws_key_type key_;
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response_type* res_p_;
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data& d_;
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public:
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template<class Handler_, class Decorator>
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handshake_op(
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Handler_&& h,
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stream& ws,
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response_type* res_p,
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string_view host, string_view target,
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Decorator const& decorator)
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: stable_async_op_base<Handler,
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beast::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_p_(res_p)
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, d_(beast::allocate_stable<data>(*this))
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{
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d_.req = ws_.build_request(
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key_, host, target, decorator);
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ws_.impl_->reset(); // VFALCO I don't like this
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}
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void
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operator()(
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error_code ec = {},
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std::size_t bytes_used = 0)
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{
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boost::ignore_unused(bytes_used);
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BOOST_ASIO_CORO_REENTER(*this)
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{
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// Send HTTP Upgrade
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ws_.impl_->do_pmd_config(d_.req);
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BOOST_ASIO_CORO_YIELD
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http::async_write(ws_.impl_->stream,
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d_.req, std::move(*this));
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if(ec)
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goto upcall;
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// Read HTTP response
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BOOST_ASIO_CORO_YIELD
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http::async_read(ws_.next_layer(),
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ws_.impl_->rd_buf, d_.res,
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std::move(*this));
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if(ec)
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goto upcall;
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ws_.on_response(d_.res, key_, ec);
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if(res_p_)
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swap(d_.res, *res_p_);
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upcall:
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this->invoke_now(ec);
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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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template<class HandshakeHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE(
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HandshakeHandler, void(error_code))
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stream<NextLayer, deflateSupported>::
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async_handshake(string_view host,
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string_view target,
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HandshakeHandler&& 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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HandshakeHandler, void(error_code));
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handshake_op<BOOST_ASIO_HANDLER_TYPE(
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HandshakeHandler, void(error_code))>{
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std::move(init.completion_handler), *this, nullptr, host,
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target, &default_decorate_req}();
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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<class HandshakeHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE(
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HandshakeHandler, void(error_code))
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stream<NextLayer, deflateSupported>::
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async_handshake(response_type& res,
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string_view host,
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string_view target,
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HandshakeHandler&& 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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HandshakeHandler, void(error_code));
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handshake_op<BOOST_ASIO_HANDLER_TYPE(
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HandshakeHandler, void(error_code))>{
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std::move(init.completion_handler), *this, &res, host,
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target, &default_decorate_req}();
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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<class RequestDecorator, class HandshakeHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE(
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HandshakeHandler, void(error_code))
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stream<NextLayer, deflateSupported>::
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async_handshake_ex(string_view host,
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string_view target,
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RequestDecorator const& decorator,
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HandshakeHandler&& 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_request_decorator<
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RequestDecorator>::value,
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"RequestDecorator requirements not met");
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BOOST_BEAST_HANDLER_INIT(
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HandshakeHandler, void(error_code));
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handshake_op<BOOST_ASIO_HANDLER_TYPE(
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HandshakeHandler, void(error_code))>{
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std::move(init.completion_handler), *this, nullptr, host,
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target, 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<class RequestDecorator, class HandshakeHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE(
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HandshakeHandler, void(error_code))
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stream<NextLayer, deflateSupported>::
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async_handshake_ex(response_type& res,
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string_view host,
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string_view target,
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RequestDecorator const& decorator,
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HandshakeHandler&& 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_request_decorator<
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RequestDecorator>::value,
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"RequestDecorator requirements not met");
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BOOST_BEAST_HANDLER_INIT(
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HandshakeHandler, void(error_code));
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handshake_op<BOOST_ASIO_HANDLER_TYPE(
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HandshakeHandler, void(error_code))>{
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std::move(init.completion_handler), *this, &res, host,
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target, 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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void
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stream<NextLayer, deflateSupported>::
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handshake(string_view host,
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string_view target)
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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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handshake(
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host, target, 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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handshake(response_type& res,
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string_view host,
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string_view target)
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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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handshake(res, host, target, 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 RequestDecorator>
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void
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stream<NextLayer, deflateSupported>::
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handshake_ex(string_view host,
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string_view target,
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RequestDecorator 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_request_decorator<
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RequestDecorator>::value,
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"RequestDecorator requirements not met");
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error_code ec;
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handshake_ex(host, target, 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 RequestDecorator>
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void
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stream<NextLayer, deflateSupported>::
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handshake_ex(response_type& res,
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string_view host,
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string_view target,
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RequestDecorator 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_request_decorator<
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RequestDecorator>::value,
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"RequestDecorator requirements not met");
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error_code ec;
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handshake_ex(res, host, target, 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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handshake(string_view host,
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string_view target, 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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do_handshake(nullptr,
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host, target, &default_decorate_req, 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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handshake(response_type& res,
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string_view host,
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string_view target,
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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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do_handshake(&res,
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host, target, &default_decorate_req, ec);
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}
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template<class NextLayer, bool deflateSupported>
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template<class RequestDecorator>
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void
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stream<NextLayer, deflateSupported>::
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handshake_ex(string_view host,
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string_view target,
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RequestDecorator 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_request_decorator<
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RequestDecorator>::value,
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"RequestDecorator requirements not met");
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do_handshake(nullptr,
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host, target, decorator, ec);
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}
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template<class NextLayer, bool deflateSupported>
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template<class RequestDecorator>
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void
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stream<NextLayer, deflateSupported>::
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handshake_ex(response_type& res,
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string_view host,
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string_view target,
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RequestDecorator 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_request_decorator<
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RequestDecorator>::value,
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"RequestDecorator requirements not met");
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do_handshake(&res,
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host, target, decorator, ec);
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}
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//------------------------------------------------------------------------------
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template<class NextLayer, bool deflateSupported>
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template<class RequestDecorator>
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void
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stream<NextLayer, deflateSupported>::
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do_handshake(
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response_type* res_p,
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string_view host,
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string_view target,
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RequestDecorator const& decorator,
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error_code& ec)
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{
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response_type res;
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impl_->reset();
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detail::sec_ws_key_type key;
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{
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auto const req = build_request(
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key, host, target, decorator);
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this->impl_->do_pmd_config(req);
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http::write(impl_->stream, req, ec);
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}
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if(ec)
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return;
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http::read(next_layer(), impl_->rd_buf, res, ec);
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if(ec)
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return;
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on_response(res, key, ec);
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if(res_p)
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*res_p = std::move(res);
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}
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} // websocket
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} // beast
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} // boost
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#endif
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