| 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 | #include <boost/http_proto/rfc/detail/rules.hpp> | ||
| 11 | #include <boost/url/grammar/digit_chars.hpp> | ||
| 12 | |||
| 13 | namespace boost { | ||
| 14 | namespace http_proto { | ||
| 15 | namespace detail { | ||
| 16 | |||
| 17 | auto | ||
| 18 | 4912 | crlf_rule_t:: | |
| 19 | parse( | ||
| 20 | char const*& it, | ||
| 21 | char const* end) const noexcept -> | ||
| 22 | system::result<value_type> | ||
| 23 | { | ||
| 24 |
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4912 | if(it == end) |
| 25 | 529 | return grammar::error::need_more; | |
| 26 |
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4383 | if(*it != '\r') |
| 27 | ✗ | return grammar::error::mismatch; | |
| 28 | 4383 | ++it; | |
| 29 |
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4383 | if(it == end) |
| 30 | 219 | return grammar::error::need_more; | |
| 31 |
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4164 | if(*it != '\n') |
| 32 | ✗ | return grammar::error::mismatch; | |
| 33 | 4164 | ++it; | |
| 34 | 4164 | return {}; | |
| 35 | } | ||
| 36 | |||
| 37 | //------------------------------------------------ | ||
| 38 | |||
| 39 | auto | ||
| 40 | 2904 | version_rule_t:: | |
| 41 | parse( | ||
| 42 | char const*& it, | ||
| 43 | char const* end) const noexcept -> | ||
| 44 | system::result<value_type> | ||
| 45 | { | ||
| 46 | 2904 | value_type v = 0; | |
| 47 |
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2904 | if(it == end) |
| 48 | { | ||
| 49 | // expected "HTTP/" | ||
| 50 | 135 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 51 | grammar::error::need_more); | ||
| 52 | } | ||
| 53 |
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2769 | if(end - it >= 5) |
| 54 | { | ||
| 55 |
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2346 | if(std::memcmp( |
| 56 | it, "HTTP/", 5) != 0) | ||
| 57 | { | ||
| 58 | ✗ | BOOST_HTTP_PROTO_RETURN_EC( | |
| 59 | grammar::error::mismatch); | ||
| 60 | } | ||
| 61 | 2346 | it += 5; | |
| 62 | } | ||
| 63 |
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2769 | if(it == end) |
| 64 | { | ||
| 65 | // expected DIGIT | ||
| 66 | 72 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 67 | grammar::error::need_more); | ||
| 68 | } | ||
| 69 |
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2697 | if(! grammar::digit_chars(*it)) |
| 70 | { | ||
| 71 | // expected DIGIT | ||
| 72 | 423 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 73 | grammar::error::need_more); | ||
| 74 | } | ||
| 75 | 2274 | v = 10 * (*it++ - '0'); | |
| 76 |
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2274 | if(it == end) |
| 77 | { | ||
| 78 | // expected "." | ||
| 79 | 180 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 80 | grammar::error::need_more); | ||
| 81 | } | ||
| 82 |
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2094 | if(*it != '.') |
| 83 | { | ||
| 84 | // expected "." | ||
| 85 | ✗ | BOOST_HTTP_PROTO_RETURN_EC( | |
| 86 | grammar::error::need_more); | ||
| 87 | } | ||
| 88 | 2094 | ++it; | |
| 89 |
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2094 | if(it == end) |
| 90 | { | ||
| 91 | // expected DIGIT | ||
| 92 | 71 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 93 | grammar::error::need_more); | ||
| 94 | } | ||
| 95 |
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2023 | if(! grammar::digit_chars(*it)) |
| 96 | { | ||
| 97 | // expected DIGIT | ||
| 98 | ✗ | BOOST_HTTP_PROTO_RETURN_EC( | |
| 99 | grammar::error::need_more); | ||
| 100 | } | ||
| 101 | 2023 | v += *it++ - '0'; | |
| 102 | 2023 | return v; | |
| 103 | } | ||
| 104 | |||
| 105 | //------------------------------------------------ | ||
| 106 | |||
| 107 | auto | ||
| 108 | 500 | status_code_rule_t:: | |
| 109 | parse( | ||
| 110 | char const*& it, | ||
| 111 | char const* end) const noexcept -> | ||
| 112 | system::result<value_type> | ||
| 113 | { | ||
| 114 | auto const dig = | ||
| 115 | 1449 | [](char c) -> int | |
| 116 | { | ||
| 117 | 1449 | unsigned char uc(c - '0'); | |
| 118 |
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1449 | if(uc > 9) |
| 119 | ✗ | return -1; | |
| 120 | 1449 | return uc; | |
| 121 | }; | ||
| 122 | |||
| 123 |
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500 | if(it == end) |
| 124 | { | ||
| 125 | // end | ||
| 126 | 9 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 127 | grammar::error::need_more); | ||
| 128 | } | ||
| 129 | 491 | auto it0 = it; | |
| 130 | 491 | int v = dig(*it); | |
| 131 |
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491 | if(v == -1) |
| 132 | { | ||
| 133 | // expected DIGIT | ||
| 134 | ✗ | BOOST_HTTP_PROTO_RETURN_EC( | |
| 135 | grammar::error::mismatch); | ||
| 136 | } | ||
| 137 | 491 | value_type t; | |
| 138 | 491 | t.v = 100 * v; | |
| 139 | 491 | ++it; | |
| 140 |
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491 | if(it == end) |
| 141 | { | ||
| 142 | // end | ||
| 143 | 8 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 144 | grammar::error::need_more); | ||
| 145 | } | ||
| 146 | 483 | v = dig(*it); | |
| 147 |
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483 | if(v == -1) |
| 148 | { | ||
| 149 | // expected DIGIT | ||
| 150 | ✗ | BOOST_HTTP_PROTO_RETURN_EC( | |
| 151 | grammar::error::mismatch); | ||
| 152 | } | ||
| 153 | 483 | t.v = t.v + (10 * v); | |
| 154 | 483 | ++it; | |
| 155 |
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483 | if(it == end) |
| 156 | { | ||
| 157 | // end | ||
| 158 | 8 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 159 | grammar::error::need_more); | ||
| 160 | } | ||
| 161 | 475 | v = dig(*it); | |
| 162 |
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475 | if(v == -1) |
| 163 | { | ||
| 164 | // expected DIGIT | ||
| 165 | ✗ | BOOST_HTTP_PROTO_RETURN_EC( | |
| 166 | grammar::error::need_more); | ||
| 167 | } | ||
| 168 | 475 | t.v = t.v + v; | |
| 169 | 475 | ++it; | |
| 170 | |||
| 171 | 475 | t.s = core::string_view(it0, it - it0); | |
| 172 | 475 | t.st = int_to_status(t.v); | |
| 173 | 475 | return t; | |
| 174 | } | ||
| 175 | |||
| 176 | //------------------------------------------------ | ||
| 177 | |||
| 178 | auto | ||
| 179 | 5837 | field_rule_t:: | |
| 180 | parse( | ||
| 181 | char const*& it, | ||
| 182 | char const* end) const noexcept -> | ||
| 183 | system::result<value_type> | ||
| 184 | { | ||
| 185 |
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5837 | if(it == end) |
| 186 | { | ||
| 187 | 152 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 188 | grammar::error::need_more); | ||
| 189 | } | ||
| 190 | // check for leading CRLF | ||
| 191 |
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5685 | if(it[0] == '\r') |
| 192 | { | ||
| 193 | 1898 | ++it; | |
| 194 |
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1898 | if(it == end) |
| 195 | { | ||
| 196 | 112 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 197 | grammar::error::need_more); | ||
| 198 | } | ||
| 199 |
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1786 | if(*it != '\n') |
| 200 | { | ||
| 201 | ✗ | BOOST_HTTP_PROTO_RETURN_EC( | |
| 202 | grammar::error::mismatch); | ||
| 203 | } | ||
| 204 | // end of fields | ||
| 205 | 1786 | ++it; | |
| 206 | 1786 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 207 | grammar::error::end_of_range); | ||
| 208 | } | ||
| 209 | |||
| 210 | 3787 | value_type v; | |
| 211 | |||
| 212 | // field name | ||
| 213 | { | ||
| 214 | auto rv = grammar::parse( | ||
| 215 | 3787 | it, end, grammar::tuple_rule( | |
| 216 | token_rule, | ||
| 217 | 3787 | grammar::squelch( | |
| 218 | 3787 | grammar::delim_rule(':')))); | |
| 219 |
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3787 | if(! rv) |
| 220 | 397 | return rv.error(); | |
| 221 | 3390 | v.name = rv.value(); | |
| 222 | } | ||
| 223 | |||
| 224 | // consume all obs-fold until field char or end of field: | ||
| 225 | // | ||
| 226 | // HTTP-message = start-line *( header-field CRLF ) CRLF [ message-body ] | ||
| 227 | // header-field = field-name ":" OWS field-value OWS | ||
| 228 | // field-value = *( field-content / obs-fold ) | ||
| 229 | // field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ] | ||
| 230 | // obs-fold = CRLF 1*( SP / HTAB ) | ||
| 231 | // | ||
| 232 | for(;;) | ||
| 233 | { | ||
| 234 | 3684 | skip_ows(it, end); | |
| 235 |
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3684 | if(it == end) |
| 236 | { | ||
| 237 | 227 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 238 | grammar::error::need_more); | ||
| 239 | } | ||
| 240 |
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3457 | if(*it != '\r') |
| 241 | { | ||
| 242 | // start of value | ||
| 243 | 2897 | break; | |
| 244 | } | ||
| 245 | 560 | ++it; | |
| 246 |
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560 | if(it == end) |
| 247 | { | ||
| 248 | 60 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 249 | grammar::error::need_more); | ||
| 250 | } | ||
| 251 |
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500 | if(*it != '\n') |
| 252 | { | ||
| 253 | ✗ | BOOST_HTTP_PROTO_RETURN_EC( | |
| 254 | grammar::error::mismatch); | ||
| 255 | } | ||
| 256 | 500 | ++it; | |
| 257 |
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500 | if(it == end) |
| 258 | { | ||
| 259 | 56 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 260 | grammar::error::need_more); | ||
| 261 | } | ||
| 262 | // FIXME: this should be a loop of some kind as we've detected a valid | ||
| 263 | // CRLF at this stage but need to account for the ABNF specifying: | ||
| 264 | // obs-fold = CRLF 1*( SP / HTAB ) | ||
| 265 |
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444 | if(*it != ' ' && |
| 266 |
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150 | *it != '\t') |
| 267 | { | ||
| 268 | // because we saw a CRLF and didn't see the required SP / HTAB, | ||
| 269 | // we know we have a zero length field value | ||
| 270 | 150 | v.value = core::string_view(it, 0); | |
| 271 | 150 | return v; | |
| 272 | } | ||
| 273 | // eat obs-fold | ||
| 274 | 294 | ++it; | |
| 275 | 294 | v.has_obs_fold = true; | |
| 276 | 294 | } | |
| 277 | |||
| 278 | 2897 | char const* s0 = it; // start of value | |
| 279 | for(;;) | ||
| 280 | { | ||
| 281 | auto rv = grammar::parse( | ||
| 282 | 2939 | it, end, grammar::tuple_rule( | |
| 283 | 2939 | grammar::token_rule( | |
| 284 | 2939 | ws_vchars), | |
| 285 | 2939 | crlf_rule)); | |
| 286 |
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2939 | if(! rv) |
| 287 | 488 | return rv.error(); | |
| 288 |
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2451 | if(it == end) |
| 289 | { | ||
| 290 | 71 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 291 | grammar::error::need_more); | ||
| 292 | } | ||
| 293 |
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2380 | if( *it != ' ' && |
| 294 |
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2338 | *it != '\t') |
| 295 | { | ||
| 296 | // end of field | ||
| 297 | 2338 | break; | |
| 298 | } | ||
| 299 | // *it will match field_value_rule | ||
| 300 | 42 | v.has_obs_fold = true; | |
| 301 | 42 | } | |
| 302 | |||
| 303 | 2338 | v.value = core::string_view(s0, (it - s0) - 2); | |
| 304 |
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2338 | BOOST_ASSERT(! v.value.empty()); |
| 305 | //BOOST_ASSERT(! ws(t.v.value.front())); | ||
| 306 | |||
| 307 | // remove trailing SP,HTAB,CR,LF | ||
| 308 | 2338 | auto p = &v.value.back(); | |
| 309 | for(;;) | ||
| 310 | { | ||
| 311 |
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2543 | switch(*p) |
| 312 | { | ||
| 313 | 205 | case ' ': case '\t': | |
| 314 | case '\r': case '\n': | ||
| 315 | 205 | --p; | |
| 316 | 205 | continue; | |
| 317 | 2338 | default: | |
| 318 | 2338 | ++p; | |
| 319 | 2338 | goto done; | |
| 320 | } | ||
| 321 | } | ||
| 322 | 2338 | done: | |
| 323 | 2338 | v.value = core::string_view( | |
| 324 | v.value.data(), | ||
| 325 | 2338 | p - v.value.data()); | |
| 326 | 2338 | return v; | |
| 327 | } | ||
| 328 | |||
| 329 | //------------------------------------------------ | ||
| 330 | |||
| 331 | void | ||
| 332 | 946 | remove_obs_fold( | |
| 333 | char* it, | ||
| 334 | char const* const end) noexcept | ||
| 335 | { | ||
| 336 |
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946 | while(it != end) |
| 337 | { | ||
| 338 |
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941 | if(*it != '\r') |
| 339 | { | ||
| 340 | 593 | ++it; | |
| 341 | 593 | continue; | |
| 342 | } | ||
| 343 |
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348 | if(end - it < 3) |
| 344 | 145 | break; | |
| 345 |
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203 | BOOST_ASSERT(it[1] == '\n'); |
| 346 |
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406 | if( it[1] == '\n' && |
| 347 | 203 | ws(it[2])) | |
| 348 | { | ||
| 349 | 200 | it[0] = ' '; | |
| 350 | 200 | it[1] = ' '; | |
| 351 | 200 | it += 3; | |
| 352 | } | ||
| 353 | else | ||
| 354 | { | ||
| 355 | 3 | ++it; | |
| 356 | } | ||
| 357 | } | ||
| 358 | 150 | } | |
| 359 | |||
| 360 | } // detail | ||
| 361 | } // http_proto | ||
| 362 | } // boost | ||
| 363 |