1//
2// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
3//
4// Distributed under the Boost Software License, Version 1.0. (See accompanying
5// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6//
7// Official repository: https://github.com/boostorg/beast
8//
9
10#ifndef BOOST_BEAST_HTTP_IMPL_BASIC_PARSER_HPP
11#define BOOST_BEAST_HTTP_IMPL_BASIC_PARSER_HPP
12
13#include <boost/beast/core/buffer_traits.hpp>
14#include <boost/asio/buffer.hpp>
15#include <boost/make_unique.hpp>
16
17namespace boost {
18namespace beast {
19namespace http {
20
21template<bool isRequest>
22template<class ConstBufferSequence>
23std::size_t
24basic_parser<isRequest>::
25put(ConstBufferSequence const& buffers,
26 error_code& ec)
27{
28 static_assert(net::is_const_buffer_sequence<
29 ConstBufferSequence>::value,
30 "ConstBufferSequence type requirements not met");
31 auto const p = net::buffer_sequence_begin(buffers);
32 auto const last = net::buffer_sequence_end(buffers);
33 if(p == last)
34 {
35 ec = {};
36 return 0;
37 }
38 if(std::next(p) == last)
39 {
40 // single buffer
41 return put(net::const_buffer(*p), ec);
42 }
43 auto const size = buffer_bytes(buffers);
44 if(size <= max_stack_buffer)
45 return put_from_stack(size, buffers, ec);
46 if(size > buf_len_)
47 {
48 // reallocate
49 buf_ = boost::make_unique_noinit<char[]>(size);
50 buf_len_ = size;
51 }
52 // flatten
53 net::buffer_copy(net::buffer(
54 buf_.get(), size), buffers);
55 return put(net::const_buffer{
56 buf_.get(), size}, ec);
57}
58
59template<bool isRequest>
60boost::optional<std::uint64_t>
61basic_parser<isRequest>::
62content_length_unchecked() const
63{
64 if(f_ & flagContentLength)
65 return len0_;
66 return boost::none;
67}
68
69template<bool isRequest>
70template<class ConstBufferSequence>
71std::size_t
72basic_parser<isRequest>::
73put_from_stack(std::size_t size,
74 ConstBufferSequence const& buffers,
75 error_code& ec)
76{
77 char buf[max_stack_buffer];
78 net::buffer_copy(net::mutable_buffer(
79 buf, sizeof(buf)), buffers);
80 return put(net::const_buffer{
81 buf, size}, ec);
82}
83
84} // http
85} // beast
86} // boost
87
88#endif
89

source code of boost/libs/beast/include/boost/beast/http/impl/basic_parser.hpp