forked from boostorg/beast
45353a7f04
* `handler_ptr` is deprecated and should not be used. Actions Required: * Replace use of `handler_ptr` with `stable_async_base` and `allocate_stable`.
560 lines
14 KiB
C++
560 lines
14 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_HTTP_IMPL_READ_HPP
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#define BOOST_BEAST_HTTP_IMPL_READ_HPP
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#include <boost/beast/http/type_traits.hpp>
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#include <boost/beast/http/error.hpp>
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#include <boost/beast/http/parser.hpp>
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#include <boost/beast/http/read.hpp>
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#include <boost/beast/core/async_base.hpp>
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#include <boost/beast/core/stream_traits.hpp>
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#include <boost/beast/core/detail/read.hpp>
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#include <boost/asio/error.hpp>
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namespace boost {
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namespace beast {
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namespace http {
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namespace detail {
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// The default maximum number of bytes to transfer in a single operation.
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std::size_t constexpr default_max_transfer_size = 65536;
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template<
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class DynamicBuffer,
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bool isRequest,
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class Condition>
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std::size_t
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parse_until(
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser,
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error_code& ec,
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Condition cond)
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{
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if(ec == net::error::eof)
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{
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if(parser.got_some())
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{
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// Caller sees EOF on next read
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ec = {};
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parser.put_eof(ec);
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BOOST_ASSERT(ec || parser.is_done());
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}
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else
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{
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ec = error::end_of_stream;
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}
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return 0;
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}
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if(ec)
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{
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// Upgrade the error if we have a partial message.
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// This causes SSL short reads (and every other error)
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// to be converted into something else, allowing the
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// caller to distinguish an SSL short read which
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// represents a safe connection closure, versus
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// a closure with data loss.
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if(parser.got_some() && ! parser.is_done())
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ec = error::partial_message;
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return 0;
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}
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if(parser.is_done())
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return 0;
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if(buffer.size() > 0)
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{
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auto const bytes_used =
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parser.put(buffer.data(), ec);
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// total = total + bytes_used; // VFALCO Can't do this in a condition
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buffer.consume(bytes_used);
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if(ec == http::error::need_more)
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{
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if(buffer.size() >= buffer.max_size())
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{
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ec = http::error::buffer_overflow;
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return 0;
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}
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ec = {};
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}
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else if(ec || cond())
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{
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return 0;
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}
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}
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return default_max_transfer_size;
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}
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// predicate is true on any forward parser progress
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template<bool isRequest>
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struct read_some_condition
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{
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basic_parser<isRequest>& parser;
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template<class DynamicBuffer>
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std::size_t
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operator()(error_code& ec, std::size_t,
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DynamicBuffer& buffer)
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{
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return detail::parse_until(
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buffer, parser, ec,
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[]
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{
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return true;
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});
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}
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};
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// predicate is true when parser header is complete
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template<bool isRequest>
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struct read_header_condition
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{
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basic_parser<isRequest>& parser;
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template<class DynamicBuffer>
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std::size_t
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operator()(error_code& ec, std::size_t,
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DynamicBuffer& buffer)
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{
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return detail::parse_until(
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buffer, parser, ec,
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[this]
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{
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return parser.is_header_done();
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});
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}
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};
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// predicate is true when parser message is complete
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template<bool isRequest>
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struct read_all_condition
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{
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basic_parser<isRequest>& parser;
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template<class DynamicBuffer>
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std::size_t
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operator()(error_code& ec, std::size_t,
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DynamicBuffer& buffer)
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{
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return detail::parse_until(
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buffer, parser, ec,
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[this]
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{
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return parser.is_done();
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});
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}
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};
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//------------------------------------------------------------------------------
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template<
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class Stream, class DynamicBuffer,
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bool isRequest, class Body, class Allocator,
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class Handler>
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class read_msg_op
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: public beast::stable_async_base<
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Handler, beast::executor_type<Stream>>
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, public net::coroutine
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{
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using parser_type =
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parser<isRequest, Body, Allocator>;
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using message_type =
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typename parser_type::value_type;
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struct data
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{
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Stream& s;
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message_type& m;
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parser_type p;
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data(
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Stream& s_,
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message_type& m_)
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: s(s_)
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, m(m_)
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, p(std::move(m))
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{
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}
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};
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data& d_;
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public:
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template<class Handler_>
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read_msg_op(
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Handler_&& h,
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Stream& s,
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DynamicBuffer& b,
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message_type& m)
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: stable_async_base<
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Handler, beast::executor_type<Stream>>(
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std::forward<Handler_>(h), s.get_executor())
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, d_(beast::allocate_stable<data>(
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*this, s, m))
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{
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http::async_read(d_.s, b, d_.p, std::move(*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_transferred)
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{
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if(! ec)
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d_.m = d_.p.release();
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this->complete_now(ec, bytes_transferred);
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}
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};
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struct run_read_msg_op
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{
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template<
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class ReadHandler,
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class AsyncReadStream,
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class DynamicBuffer,
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bool isRequest, class Body, class Allocator>
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void
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operator()(
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ReadHandler&& h,
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AsyncReadStream* s,
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DynamicBuffer* b,
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message<isRequest, Body,
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basic_fields<Allocator>>* m)
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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<ReadHandler,
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void(error_code, std::size_t)>::value,
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"ReadHandler type requirements not met");
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read_msg_op<
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AsyncReadStream,
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DynamicBuffer,
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isRequest, Body, Allocator,
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typename std::decay<ReadHandler>::type>(
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std::forward<ReadHandler>(h), *s, *b, *m);
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}
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};
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} // detail
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//------------------------------------------------------------------------------
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template<
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class SyncReadStream,
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class DynamicBuffer,
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bool isRequest>
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std::size_t
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read_some(
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SyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser)
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{
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static_assert(
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is_sync_read_stream<SyncReadStream>::value,
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"SyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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error_code ec;
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auto const bytes_transferred =
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http::read_some(stream, buffer, parser, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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return bytes_transferred;
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}
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template<
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class SyncReadStream,
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class DynamicBuffer,
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bool isRequest>
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std::size_t
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read_some(
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SyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser,
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error_code& ec)
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{
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static_assert(
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is_sync_read_stream<SyncReadStream>::value,
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"SyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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return beast::detail::read(stream, buffer,
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detail::read_some_condition<
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isRequest>{parser}, ec);
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}
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template<
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class AsyncReadStream,
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class DynamicBuffer,
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bool isRequest,
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class ReadHandler>
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BOOST_BEAST_ASYNC_RESULT2(ReadHandler)
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async_read_some(
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AsyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser,
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ReadHandler&& handler)
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{
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return beast::detail::async_read(
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stream,
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buffer,
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detail::read_some_condition<
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isRequest>{parser},
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std::forward<ReadHandler>(handler));
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}
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//------------------------------------------------------------------------------
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template<
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class SyncReadStream,
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class DynamicBuffer,
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bool isRequest>
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std::size_t
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read_header(
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SyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser)
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{
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static_assert(
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is_sync_read_stream<SyncReadStream>::value,
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"SyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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error_code ec;
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auto const bytes_transferred =
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http::read_header(stream, buffer, parser, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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return bytes_transferred;
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}
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template<
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class SyncReadStream,
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class DynamicBuffer,
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bool isRequest>
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std::size_t
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read_header(
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SyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser,
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error_code& ec)
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{
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static_assert(
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is_sync_read_stream<SyncReadStream>::value,
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"SyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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parser.eager(false);
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return beast::detail::read(stream, buffer,
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detail::read_header_condition<
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isRequest>{parser}, ec);
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}
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template<
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class AsyncReadStream,
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class DynamicBuffer,
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bool isRequest,
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class ReadHandler>
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BOOST_BEAST_ASYNC_RESULT2(ReadHandler)
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async_read_header(
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AsyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser,
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ReadHandler&& handler)
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{
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parser.eager(false);
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return beast::detail::async_read(
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stream,
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buffer,
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detail::read_header_condition<
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isRequest>{parser},
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std::forward<ReadHandler>(handler));
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}
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//------------------------------------------------------------------------------
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template<
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class SyncReadStream,
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class DynamicBuffer,
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bool isRequest>
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std::size_t
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read(
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SyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser)
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{
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static_assert(
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is_sync_read_stream<SyncReadStream>::value,
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"SyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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error_code ec;
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auto const bytes_transferred =
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http::read(stream, buffer, parser, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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return bytes_transferred;
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}
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template<
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class SyncReadStream,
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class DynamicBuffer,
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bool isRequest>
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std::size_t
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read(
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SyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser,
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error_code& ec)
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{
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static_assert(
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is_sync_read_stream<SyncReadStream>::value,
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"SyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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parser.eager(true);
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return beast::detail::read(stream, buffer,
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detail::read_all_condition<
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isRequest>{parser}, ec);
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}
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template<
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class AsyncReadStream,
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class DynamicBuffer,
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bool isRequest,
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class ReadHandler>
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BOOST_BEAST_ASYNC_RESULT2(ReadHandler)
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async_read(
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AsyncReadStream& stream,
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DynamicBuffer& buffer,
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basic_parser<isRequest>& parser,
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ReadHandler&& handler)
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{
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static_assert(
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is_async_read_stream<AsyncReadStream>::value,
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"AsyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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parser.eager(true);
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return beast::detail::async_read(
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stream,
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buffer,
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detail::read_all_condition<
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isRequest>{parser},
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std::forward<ReadHandler>(handler));
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}
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//------------------------------------------------------------------------------
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template<
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class SyncReadStream,
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class DynamicBuffer,
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bool isRequest, class Body, class Allocator>
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std::size_t
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read(
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SyncReadStream& stream,
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DynamicBuffer& buffer,
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message<isRequest, Body, basic_fields<Allocator>>& msg)
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{
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static_assert(
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is_sync_read_stream<SyncReadStream>::value,
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"SyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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static_assert(is_body<Body>::value,
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"Body type requirements not met");
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static_assert(is_body_reader<Body>::value,
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"BodyReader type requirements not met");
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error_code ec;
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auto const bytes_transferred =
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http::read(stream, buffer, msg, ec);
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if(ec)
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BOOST_THROW_EXCEPTION(system_error{ec});
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return bytes_transferred;
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}
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template<
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class SyncReadStream,
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class DynamicBuffer,
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bool isRequest, class Body, class Allocator>
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std::size_t
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read(
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SyncReadStream& stream,
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DynamicBuffer& buffer,
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message<isRequest, Body, basic_fields<Allocator>>& msg,
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error_code& ec)
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{
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static_assert(
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is_sync_read_stream<SyncReadStream>::value,
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"SyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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static_assert(is_body<Body>::value,
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"Body type requirements not met");
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static_assert(is_body_reader<Body>::value,
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"BodyReader type requirements not met");
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parser<isRequest, Body, Allocator> p(std::move(msg));
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p.eager(true);
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auto const bytes_transferred =
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http::read(stream, buffer, p, ec);
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if(ec)
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return bytes_transferred;
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msg = p.release();
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return bytes_transferred;
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}
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template<
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class AsyncReadStream,
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class DynamicBuffer,
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bool isRequest, class Body, class Allocator,
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class ReadHandler>
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BOOST_BEAST_ASYNC_RESULT2(ReadHandler)
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async_read(
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AsyncReadStream& stream,
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DynamicBuffer& buffer,
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message<isRequest, Body, basic_fields<Allocator>>& msg,
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ReadHandler&& handler)
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{
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static_assert(
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is_async_read_stream<AsyncReadStream>::value,
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"AsyncReadStream type requirements not met");
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static_assert(
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net::is_dynamic_buffer<DynamicBuffer>::value,
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"DynamicBuffer type requirements not met");
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static_assert(is_body<Body>::value,
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"Body type requirements not met");
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static_assert(is_body_reader<Body>::value,
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"BodyReader type requirements not met");
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return net::async_initiate<
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ReadHandler,
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void(error_code, std::size_t)>(
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detail::run_read_msg_op{},
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handler, &stream, &buffer, &msg);
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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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