GCC Code Coverage Report

Directory: libs/http_proto/
File: libs/http_proto/src/detail/header.cpp
Date: 2024-03-22 19:51:41
Exec Total Coverage
Lines: 546 581 94.0%
Functions: 47 56 83.9%
Branches: 244 299 81.6%
Line Branch Exec Source
1 //
2 // Copyright (c) 2019 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/detail/header.hpp>
11 #include <boost/http_proto/field.hpp>
12 #include <boost/http_proto/fields_view_base.hpp>
13 #include <boost/http_proto/header_limits.hpp>
14 #include <boost/http_proto/rfc/list_rule.hpp>
15 #include <boost/http_proto/rfc/token_rule.hpp>
16 #include <boost/http_proto/rfc/transfer_encoding_rule.hpp>
17 #include <boost/http_proto/rfc/upgrade_rule.hpp>
18 #include <boost/http_proto/rfc/detail/rules.hpp>
19 #include <boost/url/grammar/ci_string.hpp>
20 #include <boost/url/grammar/parse.hpp>
21 #include <boost/url/grammar/range_rule.hpp>
22 #include <boost/url/grammar/recycled.hpp>
23 #include <boost/url/grammar/unsigned_rule.hpp>
24 #include <boost/assert.hpp>
25 #include <boost/assert/source_location.hpp>
26 #include <boost/static_assert.hpp>
27 #include <string>
28 #include <utility>
29
30 #include "align_up.hpp"
31
32 namespace boost {
33 namespace http_proto {
34 namespace detail {
35
36 //------------------------------------------------
37
38 auto
39 115 header::
40 entry::
41 operator+(
42 std::size_t dv) const noexcept ->
43 entry
44 {
45 return {
46 static_cast<
47 115 offset_type>(np + dv),
48 115 nn,
49 static_cast<
50 115 offset_type>(vp + dv),
51 115 vn,
52 115 id };
53 }
54
55 auto
56 79 header::
57 entry::
58 operator-(
59 std::size_t dv) const noexcept ->
60 entry
61 {
62 return {
63 static_cast<
64 79 offset_type>(np - dv),
65 79 nn,
66 static_cast<
67 79 offset_type>(vp - dv),
68 79 vn,
69 79 id };
70 }
71
72 //------------------------------------------------
73
74 constexpr
75 header::
76 header(fields_tag) noexcept
77 : kind(detail::kind::fields)
78 , cbuf("\r\n")
79 , size(2)
80 , fld{}
81 {
82 }
83
84 constexpr
85 header::
86 header(request_tag) noexcept
87 : kind(detail::kind::request)
88 , cbuf("GET / HTTP/1.1\r\n\r\n")
89 , size(18)
90 , prefix(16)
91 , req{ 3, 1,
92 http_proto::method::get }
93 {
94 }
95
96 constexpr
97 header::
98 header(response_tag) noexcept
99 : kind(detail::kind::response)
100 , cbuf("HTTP/1.1 200 OK\r\n\r\n")
101 , size(19)
102 , prefix(17)
103 , res{ 200,
104 http_proto::status::ok }
105 {
106 }
107
108 //------------------------------------------------
109
110 header const*
111 195 header::
112 get_default(detail::kind k) noexcept
113 {
114 static constexpr header h[3] = {
115 fields_tag{},
116 request_tag{},
117 response_tag{}};
118 195 return &h[k];
119 }
120
121 3309 header::
122 3309 header(empty v) noexcept
123 3309 : kind(v.param)
124 {
125 3309 }
126
127 176 header::
128 176 header(detail::kind k) noexcept
129 176 : header(*get_default(k))
130 {
131 176 }
132
133 void
134 74 header::
135 swap(header& h) noexcept
136 {
137 74 std::swap(cbuf, h.cbuf);
138 74 std::swap(buf, h.buf);
139 74 std::swap(cap, h.cap);
140 74 std::swap(max_cap, h.max_cap);
141 74 std::swap(size, h.size);
142 74 std::swap(count, h.count);
143 74 std::swap(prefix, h.prefix);
144 74 std::swap(version, h.version);
145 74 std::swap(md, h.md);
146
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 74 switch(kind)
147 {
148 18 default:
149 case detail::kind::fields:
150 18 break;
151 47 case detail::kind::request:
152 47 std::swap(
153 47 req.method_len, h.req.method_len);
154 47 std::swap(
155 47 req.target_len, h.req.target_len);
156 47 std::swap(req.method, h.req.method);
157 47 break;
158 9 case detail::kind::response:
159 9 std::swap(
160 9 res.status_int, h.res.status_int);
161 9 std::swap(res.status, h.res.status);
162 9 break;
163 }
164 74 }
165
166 /* References:
167
168 6.3. Persistence
169 https://datatracker.ietf.org/doc/html/rfc7230#section-6.3
170 */
171 bool
172 22 header::
173 keep_alive() const noexcept
174 {
175
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 22 if(md.payload == payload::error)
176 1 return false;
177
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 21 if( version ==
178 http_proto::version::http_1_1)
179 {
180
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 13 if(md.connection.close)
181 3 return false;
182 }
183 else
184 {
185
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 8 if(! md.connection.keep_alive)
186 4 return false;
187 }
188 // can't use to_eof in requests
189
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 14 BOOST_ASSERT(
190 kind != detail::kind::request ||
191 md.payload != payload::to_eof);
192
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 14 if(md.payload == payload::to_eof)
193 3 return false;
194 11 return true;
195 }
196
197 //------------------------------------------------
198
199 // return total bytes needed
200 // to store message of `size`
201 // bytes and `count` fields.
202 std::size_t
203 827 header::
204 bytes_needed(
205 std::size_t size,
206 std::size_t count) noexcept
207 {
208 // make sure `size` is big enough
209 // to hold the largest default buffer:
210 // "HTTP/1.1 200 OK\r\n\r\n"
211
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 827 if( size < 19)
212 172 size = 19;
213 static constexpr auto A =
214 alignof(header::entry);
215 827 return align_up(size, A) +
216 827 (count * sizeof(
217 827 header::entry));
218 }
219
220 std::size_t
221 1329 header::
222 table_space(
223 std::size_t count) noexcept
224 {
225 return count *
226 1329 sizeof(header::entry);
227 }
228
229 std::size_t
230 1329 header::
231 table_space() const noexcept
232 {
233 1329 return table_space(count);
234 }
235
236 auto
237 2488 header::
238 tab() const noexcept ->
239 table
240 {
241
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 2488 BOOST_ASSERT(cap > 0);
242
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 2488 BOOST_ASSERT(buf != nullptr);
243 2488 return table(buf + cap);
244 }
245
246 auto
247 689 header::
248 tab_() const noexcept ->
249 entry*
250 {
251 return reinterpret_cast<
252 689 entry*>(buf + cap);
253 }
254
255 // return true if header cbuf is a default
256 bool
257 43 header::
258 is_default() const noexcept
259 {
260 43 return buf == nullptr;
261 }
262
263 std::size_t
264 67 header::
265 find(
266 field id) const noexcept
267 {
268
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 67 if(count == 0)
269 6 return 0;
270 61 std::size_t i = 0;
271 61 auto const* p = &tab()[0];
272
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 83 while(i < count)
273 {
274
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 83 if(p->id == id)
275 61 break;
276 22 ++i;
277 22 --p;
278 }
279 61 return i;
280 }
281
282 std::size_t
283 20 header::
284 find(
285 core::string_view name) const noexcept
286 {
287
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 20 if(count == 0)
288 5 return 0;
289 15 std::size_t i = 0;
290 15 auto const* p = &tab()[0];
291
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 21 while(i < count)
292 {
293 core::string_view s(
294 21 cbuf + prefix + p->np,
295 21 p->nn);
296
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 21 if(grammar::ci_is_equal(s, name))
297 15 break;
298 6 ++i;
299 6 --p;
300 }
301 15 return i;
302 }
303
304 void
305 30 header::
306 copy_table(
307 void* dest,
308 std::size_t n) const noexcept
309 {
310 30 std::memcpy(
311 reinterpret_cast<
312 30 entry*>(dest) - n,
313 reinterpret_cast<
314 entry const*>(
315 30 cbuf + cap) - n,
316 n * sizeof(entry));
317 30 }
318
319 void
320 30 header::
321 copy_table(
322 void* dest) const noexcept
323 {
324 30 copy_table(dest, count);
325 30 }
326
327 // assign all the members but
328 // preserve the allocated memory
329 void
330 30 header::
331 assign_to(
332 header& dest) const noexcept
333 {
334 30 auto const buf_ = dest.buf;
335 30 auto const cbuf_ = dest.cbuf;
336 30 auto const cap_ = dest.cap;
337 30 dest = *this;
338 30 dest.buf = buf_;
339 30 dest.cbuf = cbuf_;
340 30 dest.cap = cap_;
341 30 }
342
343 //------------------------------------------------
344 //
345 // Metadata
346 //
347 //------------------------------------------------
348
349 std::size_t
350 ✗ header::
351 maybe_count(
352 field id) const noexcept
353 {
354 ✗ if(kind == detail::kind::fields)
355 ✗ return std::size_t(-1);
356 ✗ switch(id)
357 {
358 ✗ case field::connection:
359 ✗ return md.connection.count;
360 ✗ case field::content_length:
361 ✗ return md.content_length.count;
362 ✗ case field::expect:
363 ✗ return md.expect.count;
364 ✗ case field::transfer_encoding:
365 ✗ return md.transfer_encoding.count;
366 ✗ case field::upgrade:
367 ✗ return md.upgrade.count;
368 ✗ default:
369 ✗ break;
370 }
371 ✗ return std::size_t(-1);
372 }
373
374 bool
375 21 header::
376 is_special(
377 field id) const noexcept
378 {
379
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 21 if(kind == detail::kind::fields)
380 4 return false;
381
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 17 switch(id)
382 {
383 9 case field::connection:
384 case field::content_length:
385 case field::expect:
386 case field::transfer_encoding:
387 case field::upgrade:
388 9 return true;
389 8 default:
390 8 break;
391 }
392 8 return false;
393 }
394
395 //------------------------------------------------
396
397 // called when the start-line changes
398 void
399 2028 header::
400 on_start_line()
401 {
402 // items in both the request-line
403 // and the status-line can affect
404 // the payload, for example whether
405 // or not EOF marks the end of the
406 // payload.
407
408 2028 update_payload();
409 2028 }
410
411 // called after a field is inserted
412 void
413 2907 header::
414 on_insert(
415 field id,
416 core::string_view v)
417 {
418
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 2907 if(kind == detail::kind::fields)
419 510 return;
420
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 2397 switch(id)
421 {
422 589 case field::content_length:
423 589 return on_insert_content_length(v);
424 147 case field::connection:
425 147 return on_insert_connection(v);
426 47 case field::expect:
427 47 return on_insert_expect(v);
428 44 case field::transfer_encoding:
429 44 return on_insert_transfer_encoding();
430 24 case field::upgrade:
431 24 return on_insert_upgrade(v);
432 1546 default:
433 1546 break;
434 }
435 }
436
437 // called when one field is erased
438 void
439 40 header::
440 on_erase(field id)
441 {
442
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 40 if(kind == detail::kind::fields)
443 3 return;
444
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 37 switch(id)
445 {
446 9 case field::connection:
447 9 return on_erase_connection();
448 4 case field::content_length:
449 4 return on_erase_content_length();
450 10 case field::expect:
451 10 return on_erase_expect();
452 5 case field::transfer_encoding:
453 5 return on_erase_transfer_encoding();
454 4 case field::upgrade:
455 4 return on_erase_upgrade();
456 5 default:
457 5 break;
458 }
459 }
460
461 //------------------------------------------------
462
463 /*
464 https://datatracker.ietf.org/doc/html/rfc7230#section-6.1
465 */
466 void
467 151 header::
468 on_insert_connection(
469 core::string_view v)
470 {
471 151 ++md.connection.count;
472
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 151 if(md.connection.ec.failed())
473 5 return;
474 auto rv = grammar::parse(
475
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 150 v, list_rule(token_rule, 1));
476
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 150 if(! rv)
477 {
478 4 md.connection.ec =
479 8 BOOST_HTTP_PROTO_ERR(
480 error::bad_connection);
481 4 return;
482 }
483 146 md.connection.ec = {};
484
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 303 for(auto t : *rv)
485 {
486
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 157 if(grammar::ci_is_equal(
487 t, "close"))
488 107 md.connection.close = true;
489
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 50 else if(grammar::ci_is_equal(
490 t, "keep-alive"))
491 26 md.connection.keep_alive = true;
492
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 24 else if(grammar::ci_is_equal(
493 t, "upgrade"))
494 19 md.connection.upgrade = true;
495 }
496 }
497
498 void
499 590 header::
500 on_insert_content_length(
501 core::string_view v)
502 {
503 static
504 constexpr
505 grammar::unsigned_rule<
506 std::uint64_t> num_rule{};
507
508 590 ++md.content_length.count;
509
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 590 if(md.content_length.ec.failed())
510 467 return;
511 auto rv =
512 588 grammar::parse(v, num_rule);
513
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 588 if(! rv)
514 {
515 // parse failure
516 5 md.content_length.ec =
517 10 BOOST_HTTP_PROTO_ERR(
518 error::bad_content_length);
519 5 md.content_length.value = 0;
520 5 update_payload();
521 5 return;
522 }
523
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 583 if(md.content_length.count == 1)
524 {
525 // one value
526 453 md.content_length.ec = {};
527 453 md.content_length.value = *rv;
528 453 update_payload();
529 453 return;
530 }
531
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 130 if(*rv == md.content_length.value)
532 {
533 // ok: duplicate value
534 7 return;
535 }
536 // bad: different values
537 123 md.content_length.ec =
538 246 BOOST_HTTP_PROTO_ERR(
539 error::multiple_content_length);
540 123 md.content_length.value = 0;
541 123 update_payload();
542 }
543
544 void
545 53 header::
546 on_insert_expect(
547 core::string_view v)
548 {
549 53 ++md.expect.count;
550
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 53 if(kind != detail::kind::request)
551 8 return;
552
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 45 if(md.expect.ec.failed())
553 4 return;
554 // VFALCO Should we allow duplicate
555 // Expect fields that have 100-continue?
556
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 73 if( md.expect.count > 1 ||
557
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 73 ! grammar::ci_is_equal(v,
558 "100-continue"))
559 {
560 19 md.expect.ec =
561 38 BOOST_HTTP_PROTO_ERR(
562 error::bad_expect);
563 19 md.expect.is_100_continue = false;
564 19 return;
565 }
566 22 md.expect.is_100_continue = true;
567 }
568
569 void
570 47 header::
571 on_insert_transfer_encoding()
572 {
573 47 ++md.transfer_encoding.count;
574
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 47 if(md.transfer_encoding.ec.failed())
575 1 return;
576 46 auto const n =
577 md.transfer_encoding.count;
578 46 md.transfer_encoding = {};
579 46 md.transfer_encoding.count = n;
580 53 for(auto s :
581 fields_view_base::subrange(
582
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 152 this, find(field::transfer_encoding)))
583 {
584 auto rv = grammar::parse(
585
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 61 s, transfer_encoding_rule);
586
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 61 if(! rv)
587 {
588 // parse error
589 4 md.transfer_encoding.ec =
590 8 BOOST_HTTP_PROTO_ERR(
591 error::bad_transfer_encoding);
592 4 md.transfer_encoding.codings = 0;
593 4 md.transfer_encoding.is_chunked = false;
594 4 update_payload();
595 4 return;
596 }
597 57 md.transfer_encoding.codings += rv->size();
598
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 119 for(auto t : *rv)
599 {
600
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 66 if(! md.transfer_encoding.is_chunked)
601 {
602
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 62 if(t.id == transfer_coding::chunked)
603 26 md.transfer_encoding.is_chunked = true;
604 62 continue;
605 }
606
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 4 if(t.id == transfer_coding::chunked)
607 {
608 // chunked appears twice
609 2 md.transfer_encoding.ec =
610 4 BOOST_HTTP_PROTO_ERR(
611 error::bad_transfer_encoding);
612 2 md.transfer_encoding.codings = 0;
613 2 md.transfer_encoding.is_chunked = false;
614 2 update_payload();
615 2 return;
616 }
617 // chunked must be last
618 2 md.transfer_encoding.ec =
619 4 BOOST_HTTP_PROTO_ERR(
620 error::bad_transfer_encoding);
621 2 md.transfer_encoding.codings = 0;
622 2 md.transfer_encoding.is_chunked = false;
623 2 update_payload();
624 2 return;
625 }
626 }
627 38 update_payload();
628 }
629
630 void
631 26 header::
632 on_insert_upgrade(
633 core::string_view v)
634 {
635 26 ++md.upgrade.count;
636
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 26 if(md.upgrade.ec.failed())
637 5 return;
638
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 25 if( version !=
639 http_proto::version::http_1_1)
640 {
641 1 md.upgrade.ec =
642 2 BOOST_HTTP_PROTO_ERR(
643 error::bad_upgrade);
644 1 md.upgrade.websocket = false;
645 1 return;
646 }
647 auto rv = grammar::parse(
648
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 24 v, upgrade_rule);
649
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 24 if(! rv)
650 {
651 3 md.upgrade.ec =
652 6 BOOST_HTTP_PROTO_ERR(
653 error::bad_upgrade);
654 3 md.upgrade.websocket = false;
655 3 return;
656 }
657
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 21 if(! md.upgrade.websocket)
658 {
659
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 23 for(auto t : *rv)
660 {
661 16 if( grammar::ci_is_equal(
662
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 26 t.name, "websocket") &&
663 10 t.version.empty())
664 {
665 9 md.upgrade.websocket = true;
666 9 break;
667 }
668 }
669 }
670 }
671
672 //------------------------------------------------
673
674 void
675 9 header::
676 on_erase_connection()
677 {
678
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 9 BOOST_ASSERT(
679 md.connection.count > 0);
680 // reset and re-insert
681 9 auto n = md.connection.count - 1;
682 9 auto const p = cbuf + prefix;
683 9 auto const* e = &tab()[0];
684 9 md.connection = {};
685
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 14 while(n > 0)
686 {
687
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 5 if(e->id == field::connection)
688
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 4 on_insert_connection(
689 core::string_view(
690 4 p + e->vp, e->vn));
691 5 --n;
692 5 --e;
693 }
694 9 }
695
696 void
697 4 header::
698 on_erase_content_length()
699 {
700
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 4 BOOST_ASSERT(
701 md.content_length.count > 0);
702 4 --md.content_length.count;
703
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 4 if(md.content_length.count == 0)
704 {
705 // no Content-Length
706 1 md.content_length = {};
707 1 update_payload();
708 1 return;
709 }
710
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 3 if(! md.content_length.ec.failed())
711 {
712 // removing a duplicate value
713 2 return;
714 }
715 // reset and re-insert
716 1 auto n = md.content_length.count;
717 1 auto const p = cbuf + prefix;
718 1 auto const* e = &tab()[0];
719 1 md.content_length = {};
720
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 2 while(n > 0)
721 {
722
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723
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 1 on_insert_content_length(
724 core::string_view(
725 1 p + e->vp, e->vn));
726 1 --n;
727 1 --e;
728 }
729 1 update_payload();
730 }
731
732 void
733 10 header::
734 on_erase_expect()
735 {
736
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 10 BOOST_ASSERT(
737 md.expect.count > 0);
738 10 --md.expect.count;
739
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 10 if(kind != detail::kind::request)
740 1 return;
741
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 9 if(md.expect.count == 0)
742 {
743 // no Expect
744 3 md.expect = {};
745 3 return;
746 }
747 // VFALCO This should be uncommented
748 // if we want to allow multiple Expect
749 // fields with the value 100-continue
750 /*
751 if(! md.expect.ec.failed())
752 return;
753 */
754 // reset and re-insert
755 6 auto n = count;
756 6 auto const p = cbuf + prefix;
757 6 auto const* e = &tab()[0];
758 6 md.expect = {};
759
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 19 while(n > 0)
760 {
761
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 13 if(e->id == field::expect)
762 6 on_insert_expect(
763 core::string_view(
764 6 p + e->vp, e->vn));
765 13 --n;
766 13 --e;
767 }
768 }
769
770 void
771 5 header::
772 on_erase_transfer_encoding()
773 {
774
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 5 BOOST_ASSERT(
775 md.transfer_encoding.count > 0);
776 5 --md.transfer_encoding.count;
777
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 5 if(md.transfer_encoding.count == 0)
778 {
779 // no Transfer-Encoding
780 2 md.transfer_encoding = {};
781 2 update_payload();
782 2 return;
783 }
784 // re-insert everything
785 3 --md.transfer_encoding.count;
786 3 on_insert_transfer_encoding();
787 }
788
789 // called when Upgrade is erased
790 void
791 4 header::
792 on_erase_upgrade()
793 {
794
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 4 BOOST_ASSERT(
795 md.upgrade.count > 0);
796 4 --md.upgrade.count;
797
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 4 if(md.upgrade.count == 0)
798 {
799 // no Upgrade
800 2 md.upgrade = {};
801 2 return;
802 }
803 // reset and re-insert
804 2 auto n = md.upgrade.count;
805 2 auto const p = cbuf + prefix;
806 2 auto const* e = &tab()[0];
807 2 md.upgrade = {};
808
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 4 while(n > 0)
809 {
810
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 2 if(e->id == field::upgrade)
811
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 2 on_insert_upgrade(
812 core::string_view(
813 2 p + e->vp, e->vn));
814 2 --n;
815 2 --e;
816 }
817 }
818
819 //------------------------------------------------
820
821 // called when all fields with id are removed
822 void
823 60 header::
824 on_erase_all(
825 field id)
826 {
827
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 60 if(kind == detail::kind::fields)
828 17 return;
829
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 43 switch(id)
830 {
831 3 case field::connection:
832 3 md.connection = {};
833 3 return;
834
835 2 case field::content_length:
836 2 md.content_length = {};
837 2 update_payload();
838 2 return;
839
840 5 case field::expect:
841 5 md.expect = {};
842 5 update_payload();
843 5 return;
844
845 1 case field::transfer_encoding:
846 1 md.transfer_encoding = {};
847 1 update_payload();
848 1 return;
849
850 1 case field::upgrade:
851 1 md.upgrade = {};
852 1 return;
853
854 31 default:
855 31 break;
856 }
857 }
858
859 //------------------------------------------------
860
861 /* References:
862
863 3.3. Message Body
864 https://datatracker.ietf.org/doc/html/rfc7230#section-3.3
865
866 3.3.1. Transfer-Encoding
867 https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.1
868
869 3.3.2. Content-Length
870 https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.2
871 */
872 void
873 2667 header::
874 update_payload() noexcept
875 {
876
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 2667 BOOST_ASSERT(kind !=
877 detail::kind::fields);
878
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 2667 if(md.payload_override)
879 {
880 // e.g. response to
881 // a HEAD request
882 ✗ return;
883 }
884
885 /* If there is an error in either Content-Length
886 or Transfer-Encoding, then the payload is
887 undefined. Clients should probably close the
888 connection. Servers can send a Bad Request
889 and avoid reading any payload bytes.
890 */
891
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 2667 if(md.content_length.ec.failed())
892 {
893 // invalid Content-Length
894 128 md.payload = payload::error;
895 128 md.payload_size = 0;
896 128 return;
897 }
898
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 2539 if(md.transfer_encoding.ec.failed())
899 {
900 // invalid Transfer-Encoding
901 8 md.payload = payload::error;
902 8 md.payload_size = 0;
903 8 return;
904 }
905
906 /* A sender MUST NOT send a Content-Length
907 header field in any message that contains
908 a Transfer-Encoding header field.
909 https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.2
910 */
911
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 2531 if( md.content_length.count > 0 &&
912
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 457 md.transfer_encoding.count > 0)
913 {
914 3 md.payload = payload::error;
915 3 md.payload_size = 0;
916 3 return;
917 }
918
919
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 2528 if(kind == detail::kind::response)
920 628 goto do_response;
921
922 //--------------------------------------------
923
924 /* The presence of a message body in a
925 request is signaled by a Content-Length
926 or Transfer-Encoding header field. Request
927 message framing is independent of method
928 semantics, even if the method does not
929 define any use for a message body.
930 */
931
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 1900 if(md.content_length.count > 0)
932 {
933
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 297 if(md.content_length.value > 0)
934 {
935 // non-zero Content-Length
936 291 md.payload = payload::size;
937 291 md.payload_size = md.content_length.value;
938 291 return;
939 }
940 // Content-Length: 0
941 6 md.payload = payload::none;
942 6 md.payload_size = 0;
943 6 return;
944 }
945
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 1603 if(md.transfer_encoding.is_chunked)
946 {
947 // chunked
948 14 md.payload = payload::chunked;
949 14 md.payload_size = 0;
950 14 return;
951 }
952 // no payload
953 1589 md.payload = payload::none;
954 1589 md.payload_size = 0;
955 1589 return;
956
957 //--------------------------------------------
958 628 do_response:
959
960
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 628 if( res.status_int / 100 == 1 || // 1xx e.g. Continue
961
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 618 res.status_int == 204 || // No Content
962
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 616 res.status_int == 304) // Not Modified
963 {
964 /* The correctness of any Content-Length
965 here is defined by the particular
966 resource, and cannot be determined
967 here. In any case there is no payload.
968 */
969 14 md.payload = payload::none;
970 14 md.payload_size = 0;
971 14 return;
972 }
973
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 614 if(md.content_length.count > 0)
974 {
975
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 154 if(md.content_length.value > 0)
976 {
977 // Content-Length > 0
978 141 md.payload = payload::size;
979 141 md.payload_size = md.content_length.value;
980 141 return;
981 }
982 // Content-Length: 0
983 13 md.payload = payload::none;
984 13 md.payload_size = 0;
985 13 return;
986 }
987
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 460 if(md.transfer_encoding.is_chunked)
988 {
989 // chunked
990 5 md.payload = payload::chunked;
991 5 md.payload_size = 0;
992 5 return;
993 }
994
995 // eof needed
996 455 md.payload = payload::to_eof;
997 455 md.payload_size = 0;
998 }
999
1000 //------------------------------------------------
1001
1002 std::size_t
1003 529 header::
1004 count_crlf(
1005 core::string_view s) noexcept
1006 {
1007 529 auto it = s.data();
1008 529 auto len = s.size();
1009 529 std::size_t n = 0;
1010
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 18544 while(len >= 2)
1011 {
1012
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 18015 if( it[0] == '\r' &&
1013
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 1693 it[1] != '\r')
1014 {
1015
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 1693 if(it[1] == '\n')
1016 1693 n++;
1017 1693 it += 2;
1018 1693 len -= 2;
1019 }
1020 else
1021 {
1022 16322 it++;
1023 16322 len--;
1024 }
1025 }
1026 529 return n;
1027 }
1028
1029 static
1030 void
1031 3954 parse_start_line(
1032 header& h,
1033 header_limits const& lim,
1034 std::size_t new_size,
1035 system::error_code& ec) noexcept
1036 {
1037
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 3954 BOOST_ASSERT(h.size == 0);
1038
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 3954 BOOST_ASSERT(h.prefix == 0);
1039
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 3954 BOOST_ASSERT(h.cbuf != nullptr);
1040
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 3954 BOOST_ASSERT(
1041 h.kind != detail::kind::fields);
1042
1043 3954 auto const it0 = h.cbuf;
1044 3954 auto const end = it0 + new_size;
1045 3954 char const* it = it0;
1046
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 3954 if( new_size > lim.max_start_line)
1047 ✗ new_size = lim.max_start_line;
1048
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 3954 if(h.kind == detail::kind::request)
1049 {
1050 auto rv = grammar::parse(
1051 3356 it, end, request_line_rule);
1052
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 3356 if(! rv)
1053 {
1054 1809 ec = rv.error();
1055
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 3618 if( ec == grammar::error::need_more &&
1056
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 1809 new_size == lim.max_start_line)
1057 ✗ ec = BOOST_HTTP_PROTO_ERR(
1058 error::start_line_limit);
1059 1809 return;
1060 }
1061 // method
1062 1547 auto sm = std::get<0>(*rv);
1063 1547 h.req.method = string_to_method(sm);
1064 1547 h.req.method_len =
1065 1547 static_cast<offset_type>(sm.size());
1066 // target
1067 1547 auto st = std::get<1>(*rv);
1068 1547 h.req.target_len =
1069 1547 static_cast<offset_type>(st.size());
1070 // version
1071
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 1547 switch(std::get<2>(*rv))
1072 {
1073 20 case 10:
1074 20 h.version =
1075 http_proto::version::http_1_0;
1076 20 break;
1077 1527 case 11:
1078 1527 h.version =
1079 http_proto::version::http_1_1;
1080 1527 break;
1081 ✗ default:
1082 {
1083 ✗ ec = BOOST_HTTP_PROTO_ERR(
1084 error::bad_version);
1085 ✗ return;
1086 }
1087 }
1088 }
1089 else
1090 {
1091 auto rv = grammar::parse(
1092 598 it, end, status_line_rule);
1093
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 598 if(! rv)
1094 {
1095 151 ec = rv.error();
1096
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 302 if( ec == grammar::error::need_more &&
1097
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 151 new_size == lim.max_start_line)
1098 ✗ ec = BOOST_HTTP_PROTO_ERR(
1099 error::start_line_limit);
1100 151 return;
1101 }
1102 // version
1103
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 447 switch(std::get<0>(*rv))
1104 {
1105 5 case 10:
1106 5 h.version =
1107 http_proto::version::http_1_0;
1108 5 break;
1109 442 case 11:
1110 442 h.version =
1111 http_proto::version::http_1_1;
1112 442 break;
1113 ✗ default:
1114 {
1115 ✗ ec = BOOST_HTTP_PROTO_ERR(
1116 error::bad_version);
1117 ✗ return;
1118 }
1119 }
1120 // status-code
1121 447 h.res.status_int =
1122 static_cast<unsigned short>(
1123 447 std::get<1>(*rv).v);
1124 447 h.res.status = std::get<1>(*rv).st;
1125 }
1126 1994 h.prefix = static_cast<offset_type>(it - it0);
1127 1994 h.size = h.prefix;
1128 1994 h.on_start_line();
1129 }
1130
1131 // returns: true if we added a field
1132 static
1133 void
1134 6766 parse_field(
1135 header& h,
1136 header_limits const& lim,
1137 std::size_t new_size,
1138 system::error_code& ec) noexcept
1139 {
1140
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✓ Branch 1 taken 6766 times.
 6766 if( new_size > lim.max_field)
1141 ✗ new_size = lim.max_field;
1142 6766 auto const it0 = h.cbuf + h.size;
1143 6766 auto const end = h.cbuf + new_size;
1144 6766 char const* it = it0;
1145 auto rv = grammar::parse(
1146 6766 it, end, field_rule);
1147
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 6766 if(rv.has_error())
1148 {
1149 4066 ec = rv.error();
1150
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 4066 if(ec == grammar::error::end_of_range)
1151 {
1152 // final CRLF
1153 1975 h.size = static_cast<
1154 1975 offset_type>(it - h.cbuf);
1155 4066 return;
1156 }
1157
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 3923 if( ec == grammar::error::need_more &&
1158
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 1832 new_size == lim.max_field)
1159 {
1160 ✗ ec = BOOST_HTTP_PROTO_ERR(
1161 error::field_size_limit);
1162 }
1163 2091 return;
1164 }
1165
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 2700 if(h.count >= lim.max_fields)
1166 {
1167 ✗ ec = BOOST_HTTP_PROTO_ERR(
1168 error::fields_limit);
1169 ✗ return;
1170 }
1171
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 2700 if(rv->has_obs_fold)
1172 {
1173 // obs fold not allowed in test views
1174
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 210 BOOST_ASSERT(h.buf != nullptr);
1175 210 remove_obs_fold(h.buf + h.size, it);
1176 }
1177 2700 auto id = string_to_field(rv->name);
1178 2700 h.size = static_cast<offset_type>(it - h.cbuf);
1179
1180 // add field table entry
1181
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 2700 if(h.buf != nullptr)
1182 {
1183 5400 auto& e = header::table(
1184 2700 h.buf + h.cap)[h.count];
1185 2700 auto const base =
1186 2700 h.buf + h.prefix;
1187 2700 e.np = static_cast<offset_type>(
1188 2700 rv->name.data() - base);
1189 2700 e.nn = static_cast<offset_type>(
1190 2700 rv->name.size());
1191 2700 e.vp = static_cast<offset_type>(
1192 2700 rv->value.data() - base);
1193 2700 e.vn = static_cast<offset_type>(
1194 2700 rv->value.size());
1195 2700 e.id = id;
1196 }
1197 2700 ++h.count;
1198 2700 h.on_insert(id, rv->value);
1199 2700 ec = {};
1200 }
1201
1202 void
1203 6026 header::
1204 parse(
1205 std::size_t new_size,
1206 header_limits const& lim,
1207 system::error_code& ec) noexcept
1208 {
1209
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 6026 if( new_size > lim.max_size)
1210 ✗ new_size = lim.max_size;
1211
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 6026 if( this->prefix == 0 &&
1212
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 4194 this->kind !=
1213 detail::kind::fields)
1214 {
1215 3954 parse_start_line(
1216 *this, lim, new_size, ec);
1217
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 3954 if(ec.failed())
1218 {
1219
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 3920 if( ec == grammar::error::need_more &&
1220
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 1960 new_size == lim.max_fields)
1221 {
1222 ✗ ec = BOOST_HTTP_PROTO_ERR(
1223 error::headers_limit);
1224 }
1225 1960 return;
1226 }
1227 }
1228 for(;;)
1229 {
1230 6766 parse_field(
1231 *this, lim, new_size, ec);
1232
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 6766 if(ec.failed())
1233 {
1234
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 5898 if( ec == grammar::error::need_more &&
1235
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 1832 new_size == lim.max_size)
1236 {
1237 ✗ ec = BOOST_HTTP_PROTO_ERR(
1238 error::headers_limit);
1239 ✗ return;
1240 }
1241 4066 break;
1242 }
1243 2700 }
1244
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 4066 if(ec == grammar::error::end_of_range)
1245 1975 ec = {};
1246 }
1247
1248 } // detail
1249 } // http_proto
1250 } // boost
1251