132 lines
2.9 KiB
C++
132 lines
2.9 KiB
C++
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//
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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_HTTP_EMPTY_BODY_HPP
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#define BOOST_BEAST_HTTP_EMPTY_BODY_HPP
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#include <boost/beast/core/detail/config.hpp>
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#include <boost/beast/http/error.hpp>
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#include <boost/beast/http/message.hpp>
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#include <boost/optional.hpp>
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namespace boost {
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namespace beast {
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namespace http {
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/** An empty <em>Body</em>
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This body is used to represent messages which do not have a
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message body. If this body is used with a parser, and the
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parser encounters octets corresponding to a message body,
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the parser will fail with the error @ref http::unexpected_body.
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The Content-Length of this body is always 0.
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*/
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struct empty_body
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{
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/** The type of container used for the body
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This determines the type of @ref message::body
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when this body type is used with a message container.
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*/
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struct value_type
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{
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};
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/** Returns the payload size of the body
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When this body is used with @ref message::prepare_payload,
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the Content-Length will be set to the payload size, and
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any chunked Transfer-Encoding will be removed.
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*/
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static
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std::uint64_t
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size(value_type)
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{
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return 0;
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}
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/** The algorithm for parsing the body
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Meets the requirements of <em>BodyReader</em>.
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*/
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#if BOOST_BEAST_DOXYGEN
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using reader = __implementation_defined__;
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#else
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struct reader
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{
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template<bool isRequest, class Fields>
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explicit
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reader(header<isRequest, Fields>&, value_type&)
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{
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}
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void
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init(boost::optional<std::uint64_t> const&, error_code& ec)
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{
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ec = {};
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}
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template<class ConstBufferSequence>
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std::size_t
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put(ConstBufferSequence const&,
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error_code& ec)
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{
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ec = error::unexpected_body;
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return 0;
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}
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void
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finish(error_code& ec)
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{
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ec = {};
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}
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};
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#endif
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/** The algorithm for serializing the body
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Meets the requirements of <em>BodyWriter</em>.
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*/
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#if BOOST_BEAST_DOXYGEN
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using writer = __implementation_defined__;
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#else
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struct writer
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{
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using const_buffers_type =
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net::const_buffer;
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template<bool isRequest, class Fields>
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explicit
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writer(header<isRequest, Fields> const&, value_type const&)
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{
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}
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void
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init(error_code& ec)
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{
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ec = {};
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}
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boost::optional<std::pair<const_buffers_type, bool>>
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get(error_code& ec)
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{
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ec = {};
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return boost::none;
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}
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};
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#endif
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};
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} // http
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} // beast
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} // boost
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#endif
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