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|
//
// Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/beast
//
#ifndef BOOST_BEAST_HTTP_DETAIL_RFC7230_HPP
#define BOOST_BEAST_HTTP_DETAIL_RFC7230_HPP
#include <boost/beast/core/string.hpp>
#include <iterator>
#include <utility>
namespace boost {
namespace beast {
namespace http {
namespace detail {
inline
bool
is_digit(char c)
{
return c >= '0' && c <= '9';
}
inline
char
is_alpha(char c)
{
static char constexpr tab[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 32
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 48
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, // 80
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, // 112
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 128
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 144
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 160
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 176
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 192
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 208
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 224
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // 240
};
BOOST_STATIC_ASSERT(sizeof(tab) == 256);
return tab[static_cast<unsigned char>(c)];
}
inline
char
is_text(char c)
{
// TEXT = <any OCTET except CTLs, but including LWS>
static char constexpr tab[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, // 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 32
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 48
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 80
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, // 112
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 128
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 144
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 160
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 176
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 192
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 208
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 224
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // 240
};
BOOST_STATIC_ASSERT(sizeof(tab) == 256);
return tab[static_cast<unsigned char>(c)];
}
inline
char
is_token_char(char c)
{
/*
tchar = "!" | "#" | "$" | "%" | "&" |
"'" | "*" | "+" | "-" | "." |
"^" | "_" | "`" | "|" | "~" |
DIGIT | ALPHA
*/
static char constexpr tab[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16
0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, // 112
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 128
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 144
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 160
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 176
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 192
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 208
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 224
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // 240
};
BOOST_STATIC_ASSERT(sizeof(tab) == 256);
return tab[static_cast<unsigned char>(c)];
}
inline
char
is_qdchar(char c)
{
/*
qdtext = HTAB / SP / "!" / %x23-5B ; '#'-'[' / %x5D-7E ; ']'-'~' / obs-text
*/
static char constexpr tab[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, // 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16
1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 32
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 48
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, // 80
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, // 112
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 128
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 144
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 160
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 176
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 192
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 208
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 224
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // 240
};
BOOST_STATIC_ASSERT(sizeof(tab) == 256);
return tab[static_cast<unsigned char>(c)];
}
inline
char
is_qpchar(char c)
{
/*
quoted-pair = "\" ( HTAB / SP / VCHAR / obs-text )
obs-text = %x80-FF
*/
static char constexpr tab[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, // 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 32
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 48
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 80
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, // 112
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 128
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 144
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 160
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 176
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 192
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 208
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 224
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // 240
};
BOOST_STATIC_ASSERT(sizeof(tab) == 256);
return tab[static_cast<unsigned char>(c)];
}
// converts to lower case,
// returns 0 if not a valid text char
//
inline
char
to_value_char(char c)
{
// TEXT = <any OCTET except CTLs, but including LWS>
static unsigned char constexpr tab[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, // 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, // 32
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, // 48
64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, // 64
112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 91, 92, 93, 94, 95, // 80
96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, // 96
112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 0, // 112
128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, // 128
144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, // 144
160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, // 160
176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, // 176
192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, // 192
208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, // 208
224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, // 224
240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255 // 240
};
BOOST_STATIC_ASSERT(sizeof(tab) == 256);
return static_cast<char>(tab[static_cast<unsigned char>(c)]);
}
// VFALCO TODO Make this return unsigned?
inline
std::int8_t
unhex(char c)
{
static signed char constexpr tab[] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 0
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 16
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 32
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, // 48
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 64
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 80
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 96
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 112
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 128
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 144
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 160
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 176
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 192
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 208
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 224
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 // 240
};
BOOST_STATIC_ASSERT(sizeof(tab) == 256);
return tab[static_cast<unsigned char>(c)];
}
template<class FwdIt>
inline
void
skip_ows(FwdIt& it, FwdIt const& end)
{
while(it != end)
{
if(*it != ' ' && *it != '\t')
break;
++it;
}
}
template<class RanIt>
inline
void
skip_ows_rev(
RanIt& it, RanIt const& first)
{
while(it != first)
{
auto const c = it[-1];
if(c != ' ' && c != '\t')
break;
--it;
}
}
// obs-fold = CRLF 1*( SP / HTAB )
// return `false` on parse error
//
template<class FwdIt>
inline
bool
skip_obs_fold(
FwdIt& it, FwdIt const& last)
{
for(;;)
{
if(*it != '\r')
return true;
if(++it == last)
return false;
if(*it != '\n')
return false;
if(++it == last)
return false;
if(*it != ' ' && *it != '\t')
return false;
for(;;)
{
if(++it == last)
return true;
if(*it != ' ' && *it != '\t')
return true;
}
}
}
template<class FwdIt>
void
skip_token(FwdIt& it, FwdIt const& last)
{
while(it != last && is_token_char(*it))
++it;
}
inline
string_view
trim(string_view s)
{
auto first = s.begin();
auto last = s.end();
skip_ows(first, last);
while(first != last)
{
auto const c = *std::prev(last);
if(c != ' ' && c != '\t')
break;
--last;
}
if(first == last)
return {};
return {&*first,
static_cast<std::size_t>(last - first)};
}
struct param_iter
{
using iter_type = string_view::const_iterator;
iter_type it;
iter_type first;
iter_type last;
std::pair<string_view, string_view> v;
bool
empty() const
{
return first == it;
}
template<class = void>
void
increment();
};
template<class>
void
param_iter::
increment()
{
/*
param-list = *( OWS ";" OWS param )
param = token OWS [ "=" OWS ( token / quoted-string ) ]
quoted-string = DQUOTE *( qdtext / quoted-pair ) DQUOTE
qdtext = HTAB / SP / "!" / %x23-5B ; '#'-'[' / %x5D-7E ; ']'-'~' / obs-text
quoted-pair = "\" ( HTAB / SP / VCHAR / obs-text )
obs-text = %x80-FF
*/
auto const err =
[&]
{
it = first;
};
v.first.clear();
v.second.clear();
detail::skip_ows(it, last);
first = it;
if(it == last)
return err();
if(*it != ';')
return err();
++it;
detail::skip_ows(it, last);
if(it == last)
return err();
// param
if(! detail::is_token_char(*it))
return err();
auto const p0 = it;
skip_token(++it, last);
auto const p1 = it;
v.first = { &*p0, static_cast<std::size_t>(p1 - p0) };
detail::skip_ows(it, last);
if(it == last)
return;
if(*it == ';')
return;
if(*it != '=')
return err();
++it;
detail::skip_ows(it, last);
if(it == last)
return;
if(*it == '"')
{
// quoted-string
auto const p2 = it;
++it;
for(;;)
{
if(it == last)
return err();
auto c = *it++;
if(c == '"')
break;
if(detail::is_qdchar(c))
continue;
if(c != '\\')
return err();
if(it == last)
return err();
c = *it++;
if(! detail::is_qpchar(c))
return err();
}
v.second = { &*p2, static_cast<std::size_t>(it - p2) };
}
else
{
// token
if(! detail::is_token_char(*it))
return err();
auto const p2 = it;
skip_token(++it, last);
v.second = { &*p2, static_cast<std::size_t>(it - p2) };
}
}
/*
#token = [ ( "," / token ) *( OWS "," [ OWS token ] ) ]
*/
struct opt_token_list_policy
{
using value_type = string_view;
bool
operator()(value_type& v,
char const*& it, string_view s) const
{
v = {};
auto need_comma = it != s.begin();
for(;;)
{
detail::skip_ows(it, s.end());
if(it == s.end())
{
it = nullptr;
return true;
}
auto const c = *it;
if(detail::is_token_char(c))
{
if(need_comma)
return false;
auto const p0 = it;
for(;;)
{
++it;
if(it == s.end())
break;
if(! detail::is_token_char(*it))
break;
}
v = string_view{&*p0,
static_cast<std::size_t>(it - p0)};
return true;
}
if(c != ',')
return false;
need_comma = false;
++it;
}
}
};
} // detail
} // http
} // beast
} // boost
#endif
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