| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2021 Vinnie Falco (vinnie.falco@gmail.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/cppalliance/http_proto | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_HTTP_PROTO_RFC_DETAIL_RULES_HPP | ||
| 11 | #define BOOST_HTTP_PROTO_RFC_DETAIL_RULES_HPP | ||
| 12 | |||
| 13 | #include <boost/http_proto/status.hpp> | ||
| 14 | #include <boost/http_proto/rfc/token_rule.hpp> | ||
| 15 | #include <boost/http_proto/detail/config.hpp> | ||
| 16 | #include <boost/url/grammar/delim_rule.hpp> | ||
| 17 | #include <boost/url/grammar/error.hpp> | ||
| 18 | #include <boost/url/grammar/lut_chars.hpp> | ||
| 19 | #include <boost/url/grammar/token_rule.hpp> | ||
| 20 | #include <boost/url/grammar/tuple_rule.hpp> | ||
| 21 | #include <boost/core/detail/string_view.hpp> | ||
| 22 | |||
| 23 | namespace boost { | ||
| 24 | namespace http_proto { | ||
| 25 | namespace detail { | ||
| 26 | |||
| 27 | //------------------------------------------------ | ||
| 28 | |||
| 29 | // WS = SP / HTAB | ||
| 30 | struct ws_t | ||
| 31 | { | ||
| 32 | constexpr | ||
| 33 | bool | ||
| 34 | 27724 | operator()(char c) const noexcept | |
| 35 | { | ||
| 36 |
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27724 | return c == ' ' || c == '\t'; |
| 37 | } | ||
| 38 | }; | ||
| 39 | |||
| 40 | constexpr ws_t ws{}; | ||
| 41 | |||
| 42 | //------------------------------------------------ | ||
| 43 | |||
| 44 | /* Used with list_rule | ||
| 45 | |||
| 46 | @par BNF | ||
| 47 | @code | ||
| 48 | ows-comma = OWS "," OWS | ||
| 49 | @endcode | ||
| 50 | */ | ||
| 51 | struct ows_comma_ows_rule_t | ||
| 52 | { | ||
| 53 | using value_type = void; | ||
| 54 | |||
| 55 | auto | ||
| 56 | parse( | ||
| 57 | char const*& it, | ||
| 58 | char const* end) const noexcept -> | ||
| 59 | system::result<void> | ||
| 60 | { | ||
| 61 | // OWS | ||
| 62 | it = grammar::find_if_not( | ||
| 63 | it, end, ws); | ||
| 64 | if(it == end) | ||
| 65 | return grammar::error::mismatch; | ||
| 66 | // "," | ||
| 67 | if(*it != ',') | ||
| 68 | return grammar::error::mismatch; | ||
| 69 | ++it; | ||
| 70 | // OWS | ||
| 71 | it = grammar::find_if_not( | ||
| 72 | it, end, ws); | ||
| 73 | return {}; | ||
| 74 | } | ||
| 75 | }; | ||
| 76 | |||
| 77 | constexpr ows_comma_ows_rule_t ows_comma_ows_rule{}; | ||
| 78 | |||
| 79 | //------------------------------------------------ | ||
| 80 | |||
| 81 | // used for request-target | ||
| 82 | // | ||
| 83 | // target-char = <any OCTET except CTLs, and excluding LWS> | ||
| 84 | // | ||
| 85 | struct target_chars_t | ||
| 86 | { | ||
| 87 | constexpr | ||
| 88 | bool | ||
| 89 | operator()(char c) const noexcept | ||
| 90 | { | ||
| 91 | return | ||
| 92 | (static_cast<unsigned char>(c) >= 0x21) && | ||
| 93 | (static_cast<unsigned char>(c) <= 0x7e); | ||
| 94 | } | ||
| 95 | }; | ||
| 96 | |||
| 97 | constexpr target_chars_t target_chars{}; | ||
| 98 | |||
| 99 | //------------------------------------------------ | ||
| 100 | |||
| 101 | // WS-VCHAR = SP / HTAB / VCHAR | ||
| 102 | struct ws_vchars_t | ||
| 103 | { | ||
| 104 | constexpr | ||
| 105 | bool | ||
| 106 | 1455 | operator()(char ch) const noexcept | |
| 107 | { | ||
| 108 | return ( | ||
| 109 |
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1455 | ch >= 0x20 && ch <= 0x7e) || |
| 110 | 1455 | ch == 0x09; | |
| 111 | } | ||
| 112 | }; | ||
| 113 | |||
| 114 | constexpr ws_vchars_t ws_vchars{}; | ||
| 115 | |||
| 116 | //------------------------------------------------ | ||
| 117 | |||
| 118 | // OWS = *( SP / HTAB ) | ||
| 119 | inline | ||
| 120 | void | ||
| 121 | skip_ows( | ||
| 122 | char const*& it, | ||
| 123 | char const* end) noexcept | ||
| 124 | { | ||
| 125 | while(it != end) | ||
| 126 | { | ||
| 127 | if(! ws(*it)) | ||
| 128 | break; | ||
| 129 | ++it; | ||
| 130 | } | ||
| 131 | } | ||
| 132 | |||
| 133 | struct ows_rule_t | ||
| 134 | { | ||
| 135 | using value_type = void; | ||
| 136 | |||
| 137 | system::result<value_type> | ||
| 138 | parse( | ||
| 139 | char const*& it, | ||
| 140 | char const* end) noexcept | ||
| 141 | { | ||
| 142 | skip_ows(it, end); | ||
| 143 | return system::error_code(); | ||
| 144 | } | ||
| 145 | }; | ||
| 146 | |||
| 147 | constexpr ows_rule_t ows_rule{}; | ||
| 148 | |||
| 149 | //------------------------------------------------ | ||
| 150 | |||
| 151 | // CRLF = CR LF | ||
| 152 | struct crlf_rule_t | ||
| 153 | { | ||
| 154 | using value_type = void; | ||
| 155 | |||
| 156 | system::result<value_type> | ||
| 157 | parse( | ||
| 158 | char const*& it, | ||
| 159 | char const* end) const noexcept; | ||
| 160 | }; | ||
| 161 | |||
| 162 | constexpr crlf_rule_t crlf_rule{}; | ||
| 163 | |||
| 164 | //------------------------------------------------ | ||
| 165 | |||
| 166 | // HTTP-version = "HTTP/" DIGIT "." DIGIT | ||
| 167 | struct version_rule_t | ||
| 168 | { | ||
| 169 | using value_type = unsigned char; | ||
| 170 | |||
| 171 | system::result<value_type> | ||
| 172 | parse( | ||
| 173 | char const*& it, | ||
| 174 | char const* end) const noexcept; | ||
| 175 | }; | ||
| 176 | |||
| 177 | constexpr version_rule_t version_rule{}; | ||
| 178 | |||
| 179 | //------------------------------------------------ | ||
| 180 | |||
| 181 | // request-line = method SP request-target SP HTTP-version CRLF | ||
| 182 | constexpr auto | ||
| 183 | request_line_rule = | ||
| 184 | grammar::tuple_rule( | ||
| 185 | token_rule, | ||
| 186 | grammar::squelch( | ||
| 187 | grammar::delim_rule(' ') ), | ||
| 188 | grammar::token_rule( | ||
| 189 | grammar::lut_chars(target_chars) ), | ||
| 190 | grammar::squelch( | ||
| 191 | grammar::delim_rule(' ') ), | ||
| 192 | version_rule, | ||
| 193 | crlf_rule); | ||
| 194 | |||
| 195 | //------------------------------------------------ | ||
| 196 | |||
| 197 | // status-code = 3DIGIT | ||
| 198 | struct status_code_rule_t | ||
| 199 | { | ||
| 200 | struct value_type | ||
| 201 | { | ||
| 202 | int v; | ||
| 203 | status st; | ||
| 204 | core::string_view s; | ||
| 205 | }; | ||
| 206 | |||
| 207 | system::result<value_type> | ||
| 208 | parse( | ||
| 209 | char const*& it, | ||
| 210 | char const* end) const noexcept; | ||
| 211 | }; | ||
| 212 | |||
| 213 | constexpr status_code_rule_t status_code_rule{}; | ||
| 214 | |||
| 215 | //------------------------------------------------ | ||
| 216 | |||
| 217 | // status-line = HTTP-version SP status-code SP reason-phrase CRLF | ||
| 218 | constexpr auto | ||
| 219 | status_line_rule = | ||
| 220 | grammar::tuple_rule( | ||
| 221 | version_rule, | ||
| 222 | grammar::squelch( | ||
| 223 | grammar::delim_rule(' ') ), | ||
| 224 | status_code_rule, | ||
| 225 | grammar::squelch( | ||
| 226 | grammar::delim_rule(' ') ), | ||
| 227 | grammar::token_rule(ws_vchars), | ||
| 228 | crlf_rule); | ||
| 229 | |||
| 230 | //------------------------------------------------ | ||
| 231 | |||
| 232 | struct field_rule_t | ||
| 233 | { | ||
| 234 | struct value_type | ||
| 235 | { | ||
| 236 | core::string_view name; | ||
| 237 | core::string_view value; | ||
| 238 | bool has_obs_fold = false; | ||
| 239 | }; | ||
| 240 | |||
| 241 | system::result<value_type> | ||
| 242 | parse( | ||
| 243 | char const*& it, | ||
| 244 | char const* end) const noexcept; | ||
| 245 | }; | ||
| 246 | |||
| 247 | constexpr field_rule_t field_rule{}; | ||
| 248 | |||
| 249 | /** Replace obs-fold with spaces | ||
| 250 | */ | ||
| 251 | BOOST_HTTP_PROTO_DECL | ||
| 252 | void | ||
| 253 | remove_obs_fold( | ||
| 254 | char *start, | ||
| 255 | char const* end) noexcept; | ||
| 256 | |||
| 257 | } // detail | ||
| 258 | } // http_proto | ||
| 259 | } // boost | ||
| 260 | |||
| 261 | #endif | ||
| 262 |