forked from boostorg/beast
e3848e7281
fix #171 Several names and HTTP identifiers are renamed to be more consistent, self-explanatory, and concise: * "Fields" is a collection of HTTP header fields (rfc7230 section 3.2) * "Header" is the Start Line plus Fields. Another way to look at it is, the HTTP message minus the body. * `basic_fields` replaces `basic_headers` * `fields` replaces `headers` * `Fields` replaces `Headers` in template parameter lists * `header` replaces `message_headers` * `header::fields` replaces `message_headers::fields` The changes are cosmetic and do not affect run-time behavior.
436 lines
11 KiB
C++
436 lines
11 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_ACCEPT_IPP
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#define BEAST_WEBSOCKET_IMPL_ACCEPT_IPP
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#include <beast/http/message.hpp>
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#include <beast/http/parser_v1.hpp>
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#include <beast/http/read.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 <beast/core/prepare_buffers.hpp>
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#include <beast/core/detail/type_traits.hpp>
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#include <boost/assert.hpp>
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#include <memory>
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#include <type_traits>
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namespace beast {
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namespace websocket {
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//------------------------------------------------------------------------------
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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<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 Fields>
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data(DeducedHandler&& h_, stream<NextLayer>& ws_,
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http::request<Body, Fields> 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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//------------------------------------------------------------------------------
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// read and respond to an upgrade request
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//
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template<class NextLayer>
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template<class Handler>
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class stream<NextLayer>::accept_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::request<http::string_body> req;
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Handler h;
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bool cont;
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int state = 0;
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template<class DeducedHandler, class Buffers>
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data(DeducedHandler&& h_, stream<NextLayer>& ws_,
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Buffers const& buffers)
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: ws(ws_)
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, h(std::forward<DeducedHandler>(h_))
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, cont(boost_asio_handler_cont_helpers::
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is_continuation(h))
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{
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using boost::asio::buffer_copy;
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using boost::asio::buffer_size;
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ws.reset();
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ws.stream_.buffer().commit(buffer_copy(
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ws.stream_.buffer().prepare(
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buffer_size(buffers)), buffers));
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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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accept_op(accept_op&&) = default;
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accept_op(accept_op const&) = default;
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template<class DeducedHandler, class... Args>
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accept_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{}, 0, false);
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}
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void operator()(error_code const& ec)
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{
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(*this)(ec, 0);
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}
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void operator()(error_code const& ec,
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std::size_t bytes_transferred, bool again = true);
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friend
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void* asio_handler_allocate(
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std::size_t size, accept_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, accept_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(accept_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, accept_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>::accept_op<Handler>::
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operator()(error_code const& ec,
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std::size_t bytes_transferred, bool again)
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{
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beast::detail::ignore_unused(bytes_transferred);
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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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// read message
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d.state = 1;
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http::async_read(d.ws.next_layer(),
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d.ws.stream_.buffer(), d.req,
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std::move(*this));
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return;
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// got message
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case 1:
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// respond to request
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#if 1
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// VFALCO I have no idea why passing std::move(*this) crashes
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d.state = 99;
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d.ws.async_accept(d.req, *this);
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#else
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response_op<Handler>{
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std::move(d.h), d.ws, d.req, true};
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#endif
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return;
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}
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}
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d.h(ec);
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}
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template<class NextLayer>
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template<class AcceptHandler>
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typename async_completion<
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AcceptHandler, void(error_code)>::result_type
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stream<NextLayer>::
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async_accept(AcceptHandler&& handler)
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{
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static_assert(is_AsyncStream<next_layer_type>::value,
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"AsyncStream requirements requirements not met");
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return async_accept(boost::asio::null_buffers{},
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std::forward<AcceptHandler>(handler));
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}
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template<class NextLayer>
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template<class ConstBufferSequence, class AcceptHandler>
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typename async_completion<
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AcceptHandler, void(error_code)>::result_type
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stream<NextLayer>::
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async_accept(ConstBufferSequence const& bs, AcceptHandler&& handler)
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{
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static_assert(is_AsyncStream<next_layer_type>::value,
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"AsyncStream requirements requirements not met");
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static_assert(beast::is_ConstBufferSequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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beast::async_completion<
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AcceptHandler, void(error_code)
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> completion(handler);
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accept_op<decltype(completion.handler)>{
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completion.handler, *this, bs};
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return completion.result.get();
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}
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template<class NextLayer>
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template<class Body, class Fields, class AcceptHandler>
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typename async_completion<
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AcceptHandler, void(error_code)>::result_type
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stream<NextLayer>::
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async_accept(http::request<Body, Fields> const& req,
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AcceptHandler&& handler)
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{
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static_assert(is_AsyncStream<next_layer_type>::value,
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"AsyncStream requirements requirements not met");
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beast::async_completion<
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AcceptHandler, void(error_code)
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> completion(handler);
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reset();
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response_op<decltype(completion.handler)>{
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completion.handler, *this, req,
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boost_asio_handler_cont_helpers::
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is_continuation(completion.handler)};
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return completion.result.get();
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}
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template<class NextLayer>
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void
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stream<NextLayer>::
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accept()
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{
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static_assert(is_SyncStream<next_layer_type>::value,
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"SyncStream requirements not met");
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error_code ec;
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accept(boost::asio::null_buffers{}, ec);
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if(ec)
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throw system_error{ec};
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}
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template<class NextLayer>
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void
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stream<NextLayer>::
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accept(error_code& ec)
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{
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static_assert(is_SyncStream<next_layer_type>::value,
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"SyncStream requirements not met");
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accept(boost::asio::null_buffers{}, ec);
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}
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template<class NextLayer>
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template<class ConstBufferSequence>
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void
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stream<NextLayer>::
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accept(ConstBufferSequence const& buffers)
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{
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static_assert(is_SyncStream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(is_ConstBufferSequence<
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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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throw system_error{ec};
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}
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template<class NextLayer>
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template<class ConstBufferSequence>
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void
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stream<NextLayer>::
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accept(ConstBufferSequence const& buffers, error_code& ec)
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{
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static_assert(is_SyncStream<next_layer_type>::value,
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"SyncStream requirements not met");
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static_assert(beast::is_ConstBufferSequence<
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ConstBufferSequence>::value,
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"ConstBufferSequence requirements not met");
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using boost::asio::buffer_copy;
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using boost::asio::buffer_size;
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reset();
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stream_.buffer().commit(buffer_copy(
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stream_.buffer().prepare(
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buffer_size(buffers)), buffers));
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http::request<http::string_body> m;
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http::read(next_layer(), stream_.buffer(), m, ec);
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if(ec)
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return;
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accept(m, ec);
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}
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template<class NextLayer>
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template<class Body, class Fields>
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void
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stream<NextLayer>::
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accept(http::request<Body, Fields> const& request)
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{
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static_assert(is_SyncStream<next_layer_type>::value,
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"SyncStream requirements not met");
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error_code ec;
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accept(request, ec);
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if(ec)
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throw system_error{ec};
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}
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template<class NextLayer>
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template<class Body, class Fields>
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void
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stream<NextLayer>::
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accept(http::request<Body, Fields> const& req,
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error_code& ec)
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{
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static_assert(is_SyncStream<next_layer_type>::value,
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"SyncStream requirements not met");
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reset();
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auto const res = build_response(req);
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http::write(stream_, res, ec);
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if(ec)
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return;
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if(res.status != 101)
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{
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ec = error::handshake_failed;
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// VFALCO TODO Respect keep alive setting, perform
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// teardown if Connection: close.
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return;
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}
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open(detail::role_type::server);
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}
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//------------------------------------------------------------------------------
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} // websocket
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} // beast
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#endif
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