forked from boostorg/beast
543 lines
16 KiB
C++
543 lines
16 KiB
C++
//
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// Copyright (c) 2016-2019 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/impl/stream_impl.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_base.hpp>
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#include <boost/beast/core/flat_buffer.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_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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request_type req;
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http::response_parser<
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typename response_type::body_type> p;
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flat_buffer fb;
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bool overflow = false; // could be a member of the op
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explicit
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data(request_type&& req_)
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: req(std::move(req_))
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{
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}
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};
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boost::weak_ptr<impl_type> wp_;
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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_>
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handshake_op(
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Handler_&& h,
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boost::shared_ptr<impl_type> const& sp,
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request_type&& req,
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detail::sec_ws_key_type key,
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response_type* res_p)
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: stable_async_base<Handler,
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beast::executor_type<stream>>(
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std::forward<Handler_>(h),
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sp->stream().get_executor())
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, wp_(sp)
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, key_(key)
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, res_p_(res_p)
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, d_(beast::allocate_stable<data>(
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*this, std::move(req)))
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{
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sp->reset(); // VFALCO I don't like this
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(*this)({}, 0, false);
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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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bool cont = true)
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{
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boost::ignore_unused(bytes_used);
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auto sp = wp_.lock();
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if(! sp)
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return this->invoke(cont,
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net::error::operation_aborted);
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auto& impl = *sp;
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BOOST_ASIO_CORO_REENTER(*this)
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{
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impl.change_status(status::handshake);
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impl.update_timer(this->get_executor());
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// write HTTP request
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impl.do_pmd_config(d_.req);
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BOOST_ASIO_CORO_YIELD
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http::async_write(impl.stream(),
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d_.req, std::move(*this));
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if(impl.check_stop_now(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(impl.stream(),
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impl.rd_buf, d_.p,
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std::move(*this));
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if(ec == http::error::buffer_overflow)
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{
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// If the response overflows the internal
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// read buffer, switch to a dynamically
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// allocated flat buffer.
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d_.fb.commit(net::buffer_copy(
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d_.fb.prepare(impl.rd_buf.size()),
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impl.rd_buf.data()));
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impl.rd_buf.clear();
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BOOST_ASIO_CORO_YIELD
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http::async_read(impl.stream(),
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d_.fb, d_.p, std::move(*this));
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if(! ec)
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{
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// Copy any leftovers back into the read
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// buffer, since this represents websocket
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// frame data.
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if(d_.fb.size() <= impl.rd_buf.capacity())
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{
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impl.rd_buf.commit(net::buffer_copy(
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impl.rd_buf.prepare(d_.fb.size()),
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d_.fb.data()));
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}
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else
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{
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ec = http::error::buffer_overflow;
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}
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}
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// Do this before the upcall
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d_.fb.clear();
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}
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if(impl.check_stop_now(ec))
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goto upcall;
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// success
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impl.reset_idle();
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impl.on_response(d_.p.get(), key_, ec);
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if(res_p_)
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swap(d_.p.get(), *res_p_);
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upcall:
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this->invoke(cont ,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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struct stream<NextLayer, deflateSupported>::
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run_handshake_op
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{
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template<class HandshakeHandler>
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void operator()(
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HandshakeHandler&& h,
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boost::shared_ptr<impl_type> const& sp,
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request_type&& req,
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detail::sec_ws_key_type key,
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response_type* res_p)
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{
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// If you get an error on the following line it means
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// that your handler does not meet the documented type
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// requirements for the handler.
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static_assert(
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beast::detail::is_invocable<HandshakeHandler,
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void(error_code)>::value,
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"HandshakeHandler type requirements not met");
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handshake_op<
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typename std::decay<HandshakeHandler>::type>(
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std::forward<HandshakeHandler>(h),
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sp, std::move(req), key, res_p);
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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 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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auto& impl = *impl_;
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impl.change_status(status::handshake);
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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 = impl.build_request(
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key, host, target, decorator);
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impl.do_pmd_config(req);
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http::write(impl.stream(), req, ec);
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}
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if(impl.check_stop_now(ec))
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return;
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http::response_parser<
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typename response_type::body_type> p;
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http::read(next_layer(), impl.rd_buf, p, ec);
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if(ec == http::error::buffer_overflow)
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{
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// If the response overflows the internal
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// read buffer, switch to a dynamically
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// allocated flat buffer.
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flat_buffer fb;
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fb.commit(net::buffer_copy(
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fb.prepare(impl.rd_buf.size()),
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impl.rd_buf.data()));
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impl.rd_buf.clear();
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http::read(next_layer(), fb, p, ec);;
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if(! ec)
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{
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// Copy any leftovers back into the read
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// buffer, since this represents websocket
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// frame data.
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if(fb.size() <= impl.rd_buf.capacity())
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{
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impl.rd_buf.commit(net::buffer_copy(
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impl.rd_buf.prepare(fb.size()),
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fb.data()));
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}
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else
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{
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ec = http::error::buffer_overflow;
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}
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}
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}
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if(impl.check_stop_now(ec))
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return;
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impl.on_response(p.get(), key, ec);
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if(impl.check_stop_now(ec))
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return;
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if(res_p)
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*res_p = p.release();
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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(
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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 type requirements not met");
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detail::sec_ws_key_type key;
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auto req = impl_->build_request(
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key, host, target, &default_decorate_req);
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return net::async_initiate<
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HandshakeHandler,
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void(error_code)>(
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run_handshake_op{},
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handler,
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impl_,
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std::move(req),
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key,
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nullptr);
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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(
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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 type requirements not met");
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detail::sec_ws_key_type key;
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auto req = impl_->build_request(
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key, host, target, &default_decorate_req);
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return net::async_initiate<
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HandshakeHandler,
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void(error_code)>(
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run_handshake_op{},
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handler,
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impl_,
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std::move(req),
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key,
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&res);
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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 type 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 type 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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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 type 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 type 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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//------------------------------------------------------------------------------
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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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#if ! BOOST_BEAST_ALLOW_DEPRECATED
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static_assert(sizeof(RequestDecorator) == 0,
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BOOST_BEAST_DEPRECATION_STRING);
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#endif
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream type 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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#if ! BOOST_BEAST_ALLOW_DEPRECATED
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static_assert(sizeof(RequestDecorator) == 0,
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BOOST_BEAST_DEPRECATION_STRING);
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#endif
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream type 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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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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#if ! BOOST_BEAST_ALLOW_DEPRECATED
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static_assert(sizeof(RequestDecorator) == 0,
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BOOST_BEAST_DEPRECATION_STRING);
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#endif
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream type 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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#if ! BOOST_BEAST_ALLOW_DEPRECATED
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static_assert(sizeof(RequestDecorator) == 0,
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BOOST_BEAST_DEPRECATION_STRING);
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#endif
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static_assert(is_sync_stream<next_layer_type>::value,
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"SyncStream type 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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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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#if ! BOOST_BEAST_ALLOW_DEPRECATED
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static_assert(sizeof(RequestDecorator) == 0,
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BOOST_BEAST_DEPRECATION_STRING);
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#endif
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static_assert(is_async_stream<next_layer_type>::value,
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"AsyncStream type 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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detail::sec_ws_key_type key;
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auto req = impl_->build_request(
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key, host, target, decorator);
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return net::async_initiate<
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HandshakeHandler,
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void(error_code)>(
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run_handshake_op{},
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handler,
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impl_,
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std::move(req),
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key,
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nullptr);
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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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#if ! BOOST_BEAST_ALLOW_DEPRECATED
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static_assert(sizeof(RequestDecorator) == 0,
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BOOST_BEAST_DEPRECATION_STRING);
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#endif
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static_assert(is_async_stream<next_layer_type>::value,
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"AsyncStream type 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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detail::sec_ws_key_type key;
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auto req = impl_->build_request(
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key, host, target, decorator);
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return net::async_initiate<
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HandshakeHandler,
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void(error_code)>(
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run_handshake_op{},
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handler,
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impl_,
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std::move(req),
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key,
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&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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