GCC Code Coverage Report

Directory: libs/http_proto/include/boost/http_proto/
File: boost/http_proto/impl/parser.ipp
Date: 2023-12-11 14:11:20
Exec Total Coverage
Lines: 437 579 75.5%
Functions: 26 33 78.8%
Branches: 228 407 56.0%
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 #ifndef BOOST_HTTP_PROTO_IMPL_PARSER_IPP
11 #define BOOST_HTTP_PROTO_IMPL_PARSER_IPP
12
13 #include <boost/http_proto/parser.hpp>
14 #include <boost/http_proto/context.hpp>
15 #include <boost/http_proto/error.hpp>
16 #include <boost/http_proto/service/zlib_service.hpp>
17 #include <boost/http_proto/detail/except.hpp>
18 #include <boost/buffers/buffer_copy.hpp>
19 #include <boost/url/grammar/ci_string.hpp>
20 #include <boost/assert.hpp>
21 #include <memory>
22
23 namespace boost {
24 namespace http_proto {
25
26 /*
27 Principles for fixed-size buffer design
28
29 axiom 1:
30 To read data you must have a buffer.
31
32 axiom 2:
33 The size of the HTTP header is not
34 known in advance.
35
36 conclusion 3:
37 A single I/O can produce a complete
38 HTTP header and additional payload
39 data.
40
41 conclusion 4:
42 A single I/O can produce multiple
43 complete HTTP headers, complete
44 payloads, and a partial header or
45 payload.
46
47 axiom 5:
48 A process is in one of two states:
49 1. at or below capacity
50 2. above capacity
51
52 axiom 6:
53 A program which can allocate an
54 unbounded number of resources can
55 go above capacity.
56
57 conclusion 7:
58 A program can guarantee never going
59 above capacity if all resources are
60 provisioned at program startup.
61
62 corollary 8:
63 `parser` and `serializer` should each
64 allocate a single buffer of calculated
65 size, and never resize it.
66
67 axiom #:
68 A parser and a serializer are always
69 used in pairs.
70
71 Buffer Usage
72
73 | | begin
74 | H | p | | f | read headers
75 | H | p | | T | f | set T body
76 | H | p | | C | T | f | make codec C
77 | H | p | b | C | T | f | decode p into b
78 | H | p | b | C | T | f | read/parse loop
79 | H | | T | f | destroy codec
80 | H | | T | f | finished
81
82 H headers
83 C codec
84 T body
85 f table
86 p partial payload
87 b body data
88
89 "payload" is the bytes coming in from
90 the stream.
91
92 "body" is the logical body, after transfer
93 encoding is removed. This can be the
94 same as the payload.
95
96 A "plain payload" is when the payload and
97 body are identical (no transfer encodings).
98
99 A "buffered payload" is any payload which is
100 not plain. A second buffer is required
101 for reading.
102
103 "overread" is additional data received past
104 the end of the headers when reading headers,
105 or additional data received past the end of
106 the message payload.
107 */
108 //-----------------------------------------------
109
110 class parser_service
111 : public service
112 {
113 public:
114 parser::config_base cfg;
115 std::size_t space_needed = 0;
116 std::size_t max_codec = 0;
117 zlib::deflate_decoder_service const*
118 deflate_svc = nullptr;
119
120 parser_service(
121 context& ctx,
122 parser::config_base const& cfg_);
123
124 std::size_t
125 7504 max_overread() const noexcept
126 {
127 return
128 7504 cfg.headers.max_size +
129 7504 cfg.min_buffer;
130 }
131 };
132
133 31 parser_service::
134 parser_service(
135 context& ctx,
136 31 parser::config_base const& cfg_)
137 31 : cfg(cfg_)
138 {
139 /*
140 | fb | cb0 | cb1 | C | T | f |
141
142 fb flat_buffer headers.max_size
143 cb0 circular_buffer min_buffer
144 cb1 circular_buffer min_buffer
145 C codec max_codec
146 T body max_type_erase
147 f table max_table_space
148
149 */
150 // validate
151 //if(cfg.min_prepare > cfg.max_prepare)
152 //detail::throw_invalid_argument();
153
154
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 31 if( cfg.min_buffer < 1 ||
155
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 31 cfg.min_buffer > cfg.body_limit)
156 ✗ detail::throw_invalid_argument();
157
158
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 31 if(cfg.max_prepare < 1)
159 ✗ detail::throw_invalid_argument();
160
161 // VFALCO TODO OVERFLOW CHECING
162 {
163 //fb_.size() - h_.size +
164 //svc_.cfg.min_buffer +
165 //svc_.cfg.min_buffer +
166 //svc_.max_codec;
167 }
168
169 // VFALCO OVERFLOW CHECKING ON THIS
170 31 space_needed +=
171
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 31 cfg.headers.valid_space_needed();
172
173 // cb0_, cb1_
174 // VFALCO OVERFLOW CHECKING ON THIS
175 31 space_needed +=
176 31 cfg.min_buffer +
177 cfg.min_buffer;
178
179 // T
180 31 space_needed += cfg.max_type_erase;
181
182 // max_codec
183 {
184
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 31 if(cfg.apply_deflate_decoder)
185 {
186 ✗ deflate_svc = &ctx.get_service<
187 ✗ zlib::deflate_decoder_service>();
188 auto const n =
189 ✗ deflate_svc->space_needed();
190 ✗ if( max_codec < n)
191 ✗ max_codec = n;
192 }
193 }
194 31 space_needed += max_codec;
195
196 // round up to alignof(detail::header::entry)
197 31 auto const al = alignof(
198 detail::header::entry);
199 31 space_needed = al * ((
200 31 space_needed + al - 1) / al);
201 31 }
202
203 void
204 31 install_parser_service(
205 context& ctx,
206 parser::config_base const& cfg)
207 {
208 ctx.make_service<
209 31 parser_service>(cfg);
210 31 }
211
212 //------------------------------------------------
213 //
214 // Special Members
215 //
216 //------------------------------------------------
217
218 791 parser::
219 parser(
220 context& ctx,
221 791 detail::kind k)
222 : ctx_(ctx)
223 , svc_(ctx.get_service<
224 1582 parser_service>())
225 , h_(detail::empty{k})
226 791 , st_(state::reset)
227 {
228 791 auto const n =
229 791 svc_.space_needed;
230
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 791 ws_.allocate(n);
231 791 h_.cap = n;
232 791 }
233
234 //------------------------------------------------
235
236 791 parser::
237 791 ~parser()
238 {
239 791 }
240
241 //------------------------------------------------
242 //
243 // Modifiers
244 //
245 //------------------------------------------------
246
247 // prepare for a new stream
248 void
249 1247 parser::
250 reset() noexcept
251 {
252 1247 ws_.clear();
253 1247 st_ = state::start;
254 1247 got_eof_ = false;
255 1247 }
256
257 void
258 1488 parser::
259 start_impl(
260 bool head_response)
261 {
262 1488 std::size_t leftover = 0;
263
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 1488 switch(st_)
264 {
265 1 default:
266 case state::reset:
267 // reset must be called first
268 1 detail::throw_logic_error();
269
270 1243 case state::start:
271 // reset required on eof
272
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 1243 if(got_eof_)
273 ✗ detail::throw_logic_error();
274 1243 break;
275
276 3 case state::header:
277
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 3 if(fb_.size() == 0)
278 {
279 // start() called twice
280 2 detail::throw_logic_error();
281 }
282 BOOST_FALLTHROUGH;
283
284 case state::body:
285 case state::set_body:
286 // current message is incomplete
287 2 detail::throw_logic_error();
288
289 240 case state::complete:
290 {
291 // remove partial body.
292
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 240 if(body_buf_ == &cb0_)
293 240 cb0_.consume(body_avail_);
294
295
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 240 if(cb0_.size() > 0)
296 {
297 // headers with no body
298 ✗ BOOST_ASSERT(h_.size > 0);
299 ✗ fb_.consume(h_.size);
300 ✗ leftover = fb_.size();
301 // move unused octets to front
302 ✗ buffers::buffer_copy(
303 ✗ buffers::mutable_buffer(
304 ✗ ws_.data(),
305 leftover),
306 ✗ fb_.data());
307 }
308 else
309 {
310 // leftover data after body
311 }
312 240 break;
313 }
314 }
315
316 1483 ws_.clear();
317
318 2966 fb_ = {
319 1483 ws_.data(),
320 1483 svc_.cfg.headers.max_size +
321 1483 svc_.cfg.min_buffer,
322 leftover };
323
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 1483 BOOST_ASSERT(fb_.capacity() ==
324 svc_.max_overread());
325
326 2966 h_ = detail::header(
327 1483 detail::empty{h_.kind});
328 1483 h_.buf = reinterpret_cast<
329 1483 char*>(ws_.data());
330 1483 h_.cbuf = h_.buf;
331 1483 h_.cap = ws_.size();
332
333
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 1483 BOOST_ASSERT(! head_response ||
334 h_.kind == detail::kind::response);
335 1483 head_response_ = head_response;
336
337 // begin with in_place mode
338 1483 how_ = how::in_place;
339 1483 st_ = state::header;
340 1483 nprepare_ = 0;
341 1483 }
342
343 auto
344 4494 parser::
345 prepare() ->
346 mutable_buffers_type
347 {
348 4494 nprepare_ = 0;
349
350
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 4494 switch(st_)
351 {
352 1 default:
353 case state::reset:
354 // reset must be called first
355 1 detail::throw_logic_error();
356
357 1 case state::start:
358 // start must be called first
359 1 detail::throw_logic_error();
360
361 4431 case state::header:
362 {
363
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 4431 BOOST_ASSERT(h_.size <
364 svc_.cfg.headers.max_size);
365 4431 auto n = fb_.capacity() - fb_.size();
366
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 4431 BOOST_ASSERT(n <= svc_.max_overread());
367
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 4431 if( n > svc_.cfg.max_prepare)
368 29 n = svc_.cfg.max_prepare;
369 4431 mbp_[0] = fb_.prepare(n);
370 4431 nprepare_ = n;
371 4431 return mutable_buffers_type(
372 8862 &mbp_[0], 1);
373 }
374
375 31 case state::body:
376 {
377
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 31 if(got_eof_)
378 ✗ return mutable_buffers_type{};
379
380 31 do_body:
381
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 55 if(! is_plain())
382 {
383 // buffered payload
384 ✗ auto n = cb0_.capacity() -
385 ✗ cb0_.size();
386 ✗ if( n > svc_.cfg.max_prepare)
387 ✗ n = svc_.cfg.max_prepare;
388 ✗ mbp_ = cb0_.prepare(n);
389 ✗ nprepare_ = n;
390 ✗ return mutable_buffers_type(mbp_);
391 }
392
393 // plain payload
394
395
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 55 if(how_ == how::in_place)
396 {
397 auto n =
398 29 body_buf_->capacity() -
399 29 body_buf_->size();
400
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 29 if( n > svc_.cfg.max_prepare)
401 1 n = svc_.cfg.max_prepare;
402 29 mbp_ = body_buf_->prepare(n);
403 29 nprepare_ = n;
404 29 return mutable_buffers_type(mbp_);
405 }
406
407
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 26 if(how_ == how::dynamic)
408 {
409 // Overreads are not allowed, or
410 // else the caller will see extra
411 // unrelated data.
412
413
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 26 if(h_.md.payload == payload::size)
414 {
415 // set_body moves avail to dyn
416
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 9 BOOST_ASSERT(body_buf_->size() == 0);
417
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 9 BOOST_ASSERT(body_avail_ == 0);
418 9 auto n = payload_remain_;
419
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 9 if( n > svc_.cfg.max_prepare)
420 1 n = svc_.cfg.max_prepare;
421 9 nprepare_ = n;
422 9 return dyn_->prepare(n);
423 }
424
425
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 17 BOOST_ASSERT(
426 h_.md.payload == payload::to_eof);
427 17 std::size_t n = 0;
428
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 17 if(! got_eof_)
429 {
430 // calculate n heuristically
431 17 n = svc_.cfg.min_buffer;
432
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 17 if( n > svc_.cfg.max_prepare)
433 1 n = svc_.cfg.max_prepare;
434 {
435 // apply max_size()
436 auto avail =
437 17 dyn_->max_size() -
438 17 dyn_->size();
439
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 17 if( n > avail)
440 8 n = avail;
441 }
442 // fill capacity() first,
443 // to avoid an allocation
444 {
445 auto avail =
446 17 dyn_->capacity() -
447 17 dyn_->size();
448
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 17 if( n > avail &&
449 avail != 0)
450 1 n = avail;
451 }
452
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 17 if(n == 0)
453 {
454 // dynamic buffer is full
455 // attempt a 1 byte read so
456 // we can detect overflow
457
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 2 BOOST_ASSERT(
458 body_buf_->size() == 0);
459 // handled in init_dynamic
460
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 2 BOOST_ASSERT(
461 body_avail_ == 0);
462 2 mbp_ = body_buf_->prepare(1);
463 2 nprepare_ = 1;
464 return
465 2 mutable_buffers_type(mbp_);
466 }
467 }
468 15 nprepare_ = n;
469 15 return dyn_->prepare(n);
470 }
471
472 // VFALCO TODO
473 ✗ if(how_ == how::pull)
474 ✗ detail::throw_logic_error();
475
476 // VFALCO TODO
477 ✗ detail::throw_logic_error();
478 }
479
480 27 case state::set_body:
481 {
482
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 27 BOOST_ASSERT(is_plain());
483
484
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 27 if(how_ == how::dynamic)
485 {
486 // attempt to transfer in-place
487 // body into the dynamic buffer.
488 27 system::error_code ec;
489
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 27 init_dynamic(ec);
490
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 27 if(! ec.failed())
491 {
492
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 26 if(st_ == state::body)
493 24 goto do_body;
494
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 2 BOOST_ASSERT(
495 st_ == state::complete);
496 2 return mutable_buffers_type{};
497 }
498
499 // not enough room, so we
500 // return this error from parse()
501 return
502 1 mutable_buffers_type{};
503 }
504
505 ✗ if(how_ == how::sink)
506 {
507 // this is a no-op, to get the
508 // caller to call parse next.
509 ✗ return mutable_buffers_type{};
510 }
511
512 // VFALCO TODO
513 ✗ detail::throw_logic_error();
514 }
515
516 3 case state::complete:
517 // intended no-op
518 3 return mutable_buffers_type{};
519 }
520 }
521
522 void
523 4485 parser::
524 commit(
525 std::size_t n)
526 {
527
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 4485 switch(st_)
528 {
529 1 default:
530 case state::reset:
531 {
532 // reset must be called first
533 1 detail::throw_logic_error();
534 }
535
536 1 case state::start:
537 {
538 // forgot to call start()
539 1 detail::throw_logic_error();
540 }
541
542 4431 case state::header:
543 {
544
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 4431 if(n > nprepare_)
545 {
546 // n can't be greater than size of
547 // the buffers returned by prepare()
548 1 detail::throw_invalid_argument();
549 }
550
551
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 4430 if(got_eof_)
552 {
553 // can't commit after EOF
554 1 detail::throw_logic_error();
555 }
556
557 4429 nprepare_ = 0; // invalidate
558 4429 fb_.commit(n);
559 4429 break;
560 }
561
562 46 case state::body:
563 {
564
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 46 if(n > nprepare_)
565 {
566 // n can't be greater than size of
567 // the buffers returned by prepare()
568 1 detail::throw_invalid_argument();
569 }
570
571
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 45 BOOST_ASSERT(! got_eof_ || n == 0);
572
573
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 45 if(! is_plain())
574 {
575 // buffered payload
576 ✗ cb0_.commit(n);
577 ✗ break;
578 }
579
580 // plain payload
581
582
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 45 if(how_ == how::in_place)
583 {
584
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 26 BOOST_ASSERT(body_buf_ == &cb0_);
585 26 cb0_.commit(n);
586
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 26 if(h_.md.payload == payload::size)
587 {
588 12 if(cb0_.size() <
589
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 12 h_.md.payload_size)
590 {
591 4 body_avail_ += n;
592 4 payload_remain_ -= n;
593 4 break;
594 }
595 8 body_avail_ = h_.md.payload_size;
596 8 payload_remain_ = 0;
597 8 st_ = state::complete;
598 8 break;
599 }
600
601
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 14 BOOST_ASSERT(
602 h_.md.payload == payload::to_eof);
603 14 body_avail_ += n;
604 14 break;
605 }
606
607
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 19 if(how_ == how::dynamic)
608 {
609
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 19 if(dyn_->size() < dyn_->max_size())
610 {
611
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 18 BOOST_ASSERT(body_avail_ == 0);
612
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 18 BOOST_ASSERT(
613 body_buf_->size() == 0);
614 18 dyn_->commit(n);
615 }
616 else
617 {
618 // If we get here then either
619 // n==0 as a no-op, or n==1 for
620 // an intended one byte read.
621
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 1 BOOST_ASSERT(n <= 1);
622 1 body_buf_->commit(n);
623 1 body_avail_ += n;
624 }
625 19 body_total_ += n;
626
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 19 if(h_.md.payload == payload::size)
627 {
628
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 6 BOOST_ASSERT(
629 n <= payload_remain_);
630 6 payload_remain_ -= n;
631
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 6 if(payload_remain_ == 0)
632 6 st_ = state::complete;
633 }
634 19 break;
635 }
636
637 ✗ if(how_ == how::sink)
638 {
639 ✗ cb0_.commit(n);
640 ✗ break;
641 }
642
643 ✗ if(how_ == how::pull)
644 {
645 // VFALCO TODO
646 ✗ detail::throw_logic_error();
647 }
648 ✗ break;
649 }
650
651 2 case state::set_body:
652 {
653
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 2 if(n > nprepare_)
654 {
655 // n can't be greater than size of
656 // the buffers returned by prepare()
657 1 detail::throw_invalid_argument();
658 }
659
660
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 1 BOOST_ASSERT(is_plain());
661
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 1 BOOST_ASSERT(n == 0);
662
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 1 if( how_ == how::dynamic ||
663 ✗ how_ == how::sink)
664 {
665 // intended no-op
666 break;
667 }
668
669 // VFALCO TODO
670 ✗ detail::throw_logic_error();
671 }
672
673 4 case state::complete:
674 {
675
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 4 BOOST_ASSERT(nprepare_ == 0);
676
677
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 4 if(n > 0)
678 {
679 // n can't be greater than size of
680 // the buffers returned by prepare()
681 1 detail::throw_invalid_argument();
682 }
683
684 // intended no-op
685 3 break;
686 }
687 }
688 4478 }
689
690 void
691 363 parser::
692 commit_eof()
693 {
694 363 nprepare_ = 0; // invalidate
695
696
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 363 switch(st_)
697 {
698 1 default:
699 case state::reset:
700 // reset must be called first
701 1 detail::throw_logic_error();
702
703 1 case state::start:
704 // forgot to call prepare()
705 1 detail::throw_logic_error();
706
707 21 case state::header:
708 21 got_eof_ = true;
709 21 break;
710
711 127 case state::body:
712 127 got_eof_ = true;
713 127 break;
714
715 212 case state::set_body:
716 212 got_eof_ = true;
717 212 break;
718
719 1 case state::complete:
720 // can't commit eof when complete
721 1 detail::throw_logic_error();
722 }
723 360 }
724
725 //-----------------------------------------------
726
727 // process input data then
728 // eof if input data runs out.
729 void
730 5407 parser::
731 parse(
732 system::error_code& ec)
733 {
734 5407 ec = {};
735
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 5407 switch(st_)
736 {
737 1 default:
738 case state::reset:
739 // reset must be called first
740 1 detail::throw_logic_error();
741
742 1 case state::start:
743 // start must be called first
744 1 detail::throw_logic_error();
745
746 4445 case state::header:
747 {
748
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 4445 BOOST_ASSERT(h_.buf == static_cast<
749 void const*>(ws_.data()));
750
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 4445 BOOST_ASSERT(h_.cbuf == static_cast<
751 void const*>(ws_.data()));
752 4445 auto const new_size = fb_.size();
753 4445 h_.parse(new_size, svc_.cfg.headers, ec);
754
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 4445 if(ec == condition::need_more_input)
755 {
756
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✓ Branch 1 taken 18 times.
 2990 if(! got_eof_)
757 {
758 // headers incomplete
759 2972 return;
760 }
761
762
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✓ Branch 2 taken 10 times.
 18 if(fb_.size() == 0)
763 {
764 // stream closed cleanly
765 8 st_ = state::complete;
766 16 ec = BOOST_HTTP_PROTO_ERR(
767 error::end_of_stream);
768 8 return;
769 }
770
771 // stream closed with a
772 // partial message received
773 10 st_ = state::reset;
774 20 ec = BOOST_HTTP_PROTO_ERR(
775 error::incomplete);
776 10 return;
777 }
778
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✓ Branch 2 taken 1327 times.
 1455 if(ec.failed())
779 {
780 // other error,
781 //
782 // VFALCO map this to a bad
783 // request or bad response error?
784 //
785 128 st_ = state::reset; // unrecoverable
786 128 return;
787 }
788
789 // headers are complete
790 1327 on_headers(ec);
791
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 1327 if(ec.failed())
792 120 return;
793
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✓ Branch 1 taken 485 times.
 1207 if(st_ == state::complete)
794 722 break;
795 BOOST_FALLTHROUGH;
796 }
797
798 case state::body:
799 {
800 485 do_body:
801
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✓ Branch 1 taken 744 times.
 744 BOOST_ASSERT(st_ == state::body);
802
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 744 BOOST_ASSERT(
803 h_.md.payload != payload::none);
804
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 744 BOOST_ASSERT(
805 h_.md.payload != payload::error);
806
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 744 if(h_.md.payload == payload::chunked)
807 {
808 // VFALCO parse chunked
809 ✗ detail::throw_logic_error();
810 }
811
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 744 else if(filt_)
812 {
813 // VFALCO TODO apply filter
814 ✗ detail::throw_logic_error();
815 }
816
817
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 744 if(how_ == how::in_place)
818 {
819
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✓ Branch 2 taken 618 times.
 618 BOOST_ASSERT(body_avail_ ==
820 body_buf_->size());
821
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 618 if(h_.md.payload == payload::size)
822 {
823 255 if(body_avail_ <
824
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 255 h_.md.payload_size)
825 {
826
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✓ Branch 1 taken 29 times.
 30 if(got_eof_)
827 {
828 // incomplete
829 2 ec = BOOST_HTTP_PROTO_ERR(
830 error::incomplete);
831 1 return;
832 }
833
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✓ Branch 2 taken 28 times.
 29 if(body_buf_->capacity() == 0)
834 {
835 // in_place buffer limit
836 2 ec = BOOST_HTTP_PROTO_ERR(
837 error::in_place_overflow);
838 1 return;
839 }
840 56 ec = BOOST_HTTP_PROTO_ERR(
841 error::need_data);
842 28 return;
843 }
844
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 225 BOOST_ASSERT(body_avail_ ==
845 h_.md.payload_size);
846 225 st_ = state::complete;
847 225 break;
848 }
849
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 363 if(body_avail_ > svc_.cfg.body_limit)
850 {
851 2 ec = BOOST_HTTP_PROTO_ERR(
852 error::body_too_large);
853 1 st_ = state::reset; // unrecoverable
854 1 return;
855 }
856
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 362 if( h_.md.payload == payload::chunked ||
857
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✓ Branch 1 taken 114 times.
 362 ! got_eof_)
858 {
859 496 ec = BOOST_HTTP_PROTO_ERR(
860 error::need_data);
861 248 return;
862 }
863
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 114 BOOST_ASSERT(got_eof_);
864 114 st_ = state::complete;
865 114 break;
866 }
867
868
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 126 if(how_ == how::dynamic)
869 {
870 // state already updated in commit
871
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 126 if(h_.md.payload == payload::size)
872 {
873 ✗ BOOST_ASSERT(body_total_ <
874 h_.md.payload_size);
875 ✗ BOOST_ASSERT(payload_remain_ > 0);
876 ✗ if(body_avail_ != 0)
877 {
878 ✗ BOOST_ASSERT(
879 dyn_->max_size() -
880 dyn_->size() <
881 payload_remain_);
882 ✗ ec = BOOST_HTTP_PROTO_ERR(
883 error::buffer_overflow);
884 ✗ st_ = state::reset; // unrecoverable
885 ✗ return;
886 }
887 ✗ if(got_eof_)
888 {
889 ✗ ec = BOOST_HTTP_PROTO_ERR(
890 error::incomplete);
891 ✗ st_ = state::reset; // unrecoverable
892 ✗ return;
893 }
894 ✗ return;
895 }
896
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 126 BOOST_ASSERT(
897 h_.md.payload == payload::to_eof);
898
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 172 if( dyn_->size() == dyn_->max_size() &&
899
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 46 body_avail_ > 0)
900 {
901 // got here from the 1-byte read
902 ✗ ec = BOOST_HTTP_PROTO_ERR(
903 error::buffer_overflow);
904 ✗ st_ = state::reset; // unrecoverable
905 ✗ return;
906 }
907
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 126 if(got_eof_)
908 {
909
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 113 BOOST_ASSERT(body_avail_ == 0);
910 113 st_ = state::complete;
911 113 break;
912 }
913
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 13 BOOST_ASSERT(body_avail_ == 0);
914 13 break;
915 }
916
917 // VFALCO TODO
918 ✗ detail::throw_logic_error();
919 }
920
921 211 case state::set_body:
922 {
923
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 211 BOOST_ASSERT(is_plain());
924
925 // transfer in_place data into set body
926
927
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 211 if(how_ == how::dynamic)
928 {
929 211 init_dynamic(ec);
930
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 211 if(! ec.failed())
931 {
932
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 211 if(st_ == state::body)
933 102 goto do_body;
934
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 109 BOOST_ASSERT(
935 st_ == state::complete);
936 109 break;
937 }
938 ✗ st_ = state::reset; // unrecoverable
939 ✗ return;
940 }
941
942 ✗ if(how_ == how::sink)
943 {
944 ✗ auto n = body_buf_->size();
945 ✗ if(h_.md.payload == payload::size)
946 {
947 // sink_->size_hint(h_.md.payload_size, ec);
948
949 ✗ if(n < h_.md.payload_size)
950 {
951 ✗ auto rv = sink_->write(
952 ✗ body_buf_->data(), false);
953 ✗ BOOST_ASSERT(rv.ec.failed() ||
954 rv.bytes == body_buf_->size());
955 ✗ BOOST_ASSERT(
956 rv.bytes >= body_avail_);
957 ✗ BOOST_ASSERT(
958 rv.bytes < payload_remain_);
959 ✗ body_buf_->consume(rv.bytes);
960 ✗ body_avail_ -= rv.bytes;
961 ✗ body_total_ += rv.bytes;
962 ✗ payload_remain_ -= rv.bytes;
963 ✗ if(rv.ec.failed())
964 {
965 ✗ ec = rv.ec;
966 ✗ st_ = state::reset; // unrecoverable
967 ✗ return;
968 }
969 ✗ st_ = state::body;
970 ✗ goto do_body;
971 }
972
973 ✗ n = h_.md.payload_size;
974 }
975 // complete
976 ✗ BOOST_ASSERT(body_buf_ == &cb0_);
977 ✗ auto rv = sink_->write(
978 ✗ body_buf_->data(), true);
979 ✗ BOOST_ASSERT(rv.ec.failed() ||
980 rv.bytes == body_buf_->size());
981 ✗ body_buf_->consume(rv.bytes);
982 ✗ if(rv.ec.failed())
983 {
984 ✗ ec = rv.ec;
985 ✗ st_ = state::reset; // unrecoverable
986 ✗ return;
987 }
988 ✗ st_ = state::complete;
989 ✗ return;
990 }
991
992 // VFALCO TODO
993 ✗ detail::throw_logic_error();
994 }
995
996 592 case state::complete:
997 {
998 // This is a no-op except when set_body
999 // was called and we have in-place data.
1000
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 592 switch(how_)
1001 {
1002 296 default:
1003 case how::in_place:
1004 296 break;
1005
1006 296 case how::dynamic:
1007 {
1008
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 296 if(body_buf_->size() == 0)
1009 296 break;
1010 ✗ BOOST_ASSERT(dyn_->size() == 0);
1011 ✗ auto n = buffers::buffer_copy(
1012 ✗ dyn_->prepare(
1013 ✗ body_buf_->size()),
1014 ✗ body_buf_->data());
1015 ✗ body_buf_->consume(n);
1016 ✗ break;
1017 }
1018
1019 ✗ case how::sink:
1020 {
1021 ✗ if(body_buf_->size() == 0)
1022 ✗ break;
1023 ✗ auto rv = sink_->write(
1024 ✗ body_buf_->data(), false);
1025 ✗ body_buf_->consume(rv.bytes);
1026 ✗ if(rv.ec.failed())
1027 {
1028 ✗ ec = rv.ec;
1029 ✗ st_ = state::reset; // unrecoverable
1030 ✗ return;
1031 }
1032 ✗ break;
1033 }
1034
1035 ✗ case how::pull:
1036 // VFALCO TODO
1037 ✗ detail::throw_logic_error();
1038 }
1039 }
1040 }
1041 }
1042
1043 //------------------------------------------------
1044
1045 auto
1046 ✗ parser::
1047 pull_some() ->
1048 const_buffers_type
1049 {
1050 ✗ return {};
1051 }
1052
1053 core::string_view
1054 1271 parser::
1055 body() const noexcept
1056 {
1057
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 1271 switch(st_)
1058 {
1059 349 default:
1060 case state::reset:
1061 case state::start:
1062 case state::header:
1063 case state::body:
1064 case state::set_body:
1065 // not complete
1066 349 return {};
1067
1068 922 case state::complete:
1069
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 922 if(how_ != how::in_place)
1070 {
1071 // not in_place
1072 346 return {};
1073 }
1074 576 auto cbp = body_buf_->data();
1075
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 576 BOOST_ASSERT(cbp[1].size() == 0);
1076
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 576 BOOST_ASSERT(cbp[0].size() >= body_avail_);
1077 576 return core::string_view(
1078 static_cast<char const*>(
1079 576 cbp[0].data()),
1080 1152 body_avail_);
1081 }
1082 }
1083
1084 core::string_view
1085 ✗ parser::
1086 release_buffered_data() noexcept
1087 {
1088 ✗ return {};
1089 }
1090
1091 //------------------------------------------------
1092 //
1093 // Implementation
1094 //
1095 //------------------------------------------------
1096
1097 auto
1098 55 parser::
1099 safe_get_header() const ->
1100 detail::header const*
1101 {
1102 // headers must be received
1103
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 110 if( ! got_header() ||
1104 55 fb_.size() == 0) // happens on eof
1105 ✗ detail::throw_logic_error();
1106
1107 55 return &h_;
1108 }
1109
1110 bool
1111 824 parser::
1112 is_plain() const noexcept
1113 {
1114
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 1648 return ! filt_ &&
1115
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 824 h_.md.payload !=
1116 824 payload::chunked;
1117 }
1118
1119 // Called immediately after complete headers
1120 // are received. We leave fb_ as-is to indicate
1121 // whether any data was received before eof.
1122 //
1123 void
1124 1327 parser::
1125 on_headers(
1126 system::error_code& ec)
1127 {
1128 1327 auto const overread = fb_.size() - h_.size;
1129
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 1327 BOOST_ASSERT(
1130 overread <= svc_.max_overread());
1131
1132 // metadata error
1133
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 1327 if(h_.md.payload == payload::error)
1134 {
1135 // VFALCO This needs looking at
1136 240 ec = BOOST_HTTP_PROTO_ERR(
1137 error::bad_payload);
1138 120 st_ = state::reset; // unrecoverable
1139 120 return;
1140 }
1141
1142 // reserve headers + table
1143 1207 ws_.reserve_front(h_.size);
1144 1207 ws_.reserve_back(h_.table_space());
1145
1146 // no payload
1147
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 1207 if( h_.md.payload == payload::none ||
1148
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 485 head_response_)
1149 {
1150 // set cb0_ to overread
1151 1444 cb0_ = {
1152 722 ws_.data(),
1153 722 fb_.capacity() - h_.size,
1154 overread };
1155 722 body_avail_ = 0;
1156 722 body_total_ = 0;
1157 722 body_buf_ = &cb0_;
1158 722 st_ = state::complete;
1159 722 return;
1160 }
1161
1162 // calculate filter
1163 485 filt_ = nullptr; // VFALCO TODO
1164
1165
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✗ Branch 2 not taken.
 485 if(is_plain())
1166 {
1167 // plain payload
1168
1169
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 485 if(h_.md.payload == payload::size)
1170 {
1171 250 if(h_.md.payload_size >
1172
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 250 svc_.cfg.body_limit)
1173 {
1174 ✗ ec = BOOST_HTTP_PROTO_ERR(
1175 error::body_too_large);
1176 ✗ st_ = state::reset; // unrecoverable
1177 ✗ return;
1178 }
1179 auto n0 =
1180 250 fb_.capacity() - h_.size +
1181 250 svc_.cfg.min_buffer +
1182 250 svc_.max_codec;
1183 // limit the capacity of cb0_ so
1184 // that going over max_overread
1185 // is impossible.
1186
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 499 if( n0 > h_.md.payload_size &&
1187 249 n0 - h_.md.payload_size >=
1188 249 svc_.max_overread())
1189 14 n0 = h_.md.payload_size +
1190 14 svc_.max_overread();
1191
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✓ Branch 2 taken 250 times.
 250 BOOST_ASSERT(n0 <= ws_.size());
1192 250 cb0_ = { ws_.data(), n0, overread };
1193 250 body_buf_ = &cb0_;
1194 250 body_avail_ = cb0_.size();
1195
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 250 if( body_avail_ >= h_.md.payload_size)
1196 225 body_avail_ = h_.md.payload_size;
1197 250 body_total_ = body_avail_;
1198 250 payload_remain_ =
1199 250 h_.md.payload_size - body_total_;
1200 250 st_ = state::body;
1201 250 return;
1202 }
1203
1204 // overread is not applicable
1205
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✓ Branch 1 taken 235 times.
 235 BOOST_ASSERT(
1206 h_.md.payload == payload::to_eof);
1207 auto const n0 =
1208 235 fb_.capacity() - h_.size +
1209 235 svc_.cfg.min_buffer +
1210 235 svc_.max_codec;
1211
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 235 BOOST_ASSERT(n0 <= ws_.size());
1212 235 cb0_ = { ws_.data(), n0, overread };
1213 235 body_buf_ = &cb0_;
1214 235 body_avail_ = cb0_.size();
1215 235 body_total_ = body_avail_;
1216 235 st_ = state::body;
1217 235 return;
1218 }
1219
1220 // buffered payload
1221 ✗ auto const n0 = fb_.capacity() - h_.size;
1222 ✗ BOOST_ASSERT(n0 <= svc_.max_overread());
1223 ✗ auto n1 = svc_.cfg.min_buffer;
1224 ✗ if(! filt_)
1225 ✗ n1 += svc_.max_codec;
1226 ✗ BOOST_ASSERT(n0 + n1 <= ws_.size());
1227 ✗ cb0_ = { ws_.data(), n0, overread };
1228 ✗ cb1_ = { ws_.data() + n0, n1 };
1229 ✗ body_buf_ = &cb1_;
1230 ✗ body_avail_ = 0;
1231 ✗ body_total_ = 0;
1232 ✗ st_ = state::body;
1233 }
1234
1235 // Called at the end of set_body
1236 void
1237 299 parser::
1238 on_set_body()
1239 {
1240 // This function is called after all
1241 // limit checking and calculation of
1242 // chunked or filter.
1243
1244
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 299 BOOST_ASSERT(got_header());
1245
1246 299 nprepare_ = 0; // invalidate
1247
1248
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 299 if(how_ == how::dynamic)
1249 {
1250
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 299 if(h_.md.payload == payload::none)
1251 {
1252
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 58 BOOST_ASSERT(st_ == state::complete);
1253 58 return;
1254 }
1255
1256 241 st_ = state::set_body;
1257 241 return;
1258 }
1259
1260 ✗ if(how_ == how::sink)
1261 {
1262 ✗ if(h_.md.payload == payload::none)
1263 {
1264 ✗ BOOST_ASSERT(st_ == state::complete);
1265 // force a trip through parse so
1266 // we can calculate any error.
1267 ✗ st_ = state::set_body;
1268 ✗ return;
1269 }
1270
1271 ✗ st_ = state::set_body;
1272 ✗ return;
1273 }
1274
1275 // VFALCO TODO
1276 ✗ detail::throw_logic_error();
1277 }
1278
1279 void
1280 238 parser::
1281 init_dynamic(
1282 system::error_code& ec)
1283 {
1284 // attempt to transfer in-place
1285 // body into the dynamic buffer.
1286
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 238 BOOST_ASSERT(
1287 body_avail_ == body_buf_->size());
1288
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 238 BOOST_ASSERT(
1289 body_total_ == body_avail_);
1290 auto const space_left =
1291 238 dyn_->max_size() - dyn_->size();
1292
1293
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 238 if(h_.md.payload == payload::size)
1294 {
1295
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 121 if(space_left < h_.md.payload_size)
1296 {
1297 2 ec = BOOST_HTTP_PROTO_ERR(
1298 error::buffer_overflow);
1299 1 return;
1300 }
1301 // reserve the full size
1302 120 dyn_->prepare(h_.md.payload_size);
1303 // transfer in-place body
1304 120 auto n = body_avail_;
1305
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 120 if( n > h_.md.payload_size)
1306 ✗ n = h_.md.payload_size;
1307
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✗ Branch 3 not taken.
 120 dyn_->commit(
1308 buffers::buffer_copy(
1309
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✗ Branch 2 not taken.
 120 dyn_->prepare(n),
1310 120 body_buf_->data()));
1311
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 120 BOOST_ASSERT(body_avail_ == n);
1312
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 120 BOOST_ASSERT(body_total_ == n);
1313
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 120 BOOST_ASSERT(payload_remain_ ==
1314 h_.md.payload_size - n);
1315 120 body_buf_->consume(n);
1316 120 body_avail_ = 0;
1317
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 120 if(n < h_.md.payload_size)
1318 {
1319
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 9 BOOST_ASSERT(
1320 body_buf_->size() == 0);
1321 9 st_ = state::body;
1322 9 return;
1323 }
1324 // complete
1325 111 st_ = state::complete;
1326 111 return;
1327 }
1328
1329
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 117 BOOST_ASSERT(h_.md.payload ==
1330 payload::to_eof);
1331
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 117 if(space_left < body_avail_)
1332 {
1333 ✗ ec = BOOST_HTTP_PROTO_ERR(
1334 error::buffer_overflow);
1335 ✗ return;
1336 }
1337
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 117 dyn_->commit(
1338 buffers::buffer_copy(
1339
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 117 dyn_->prepare(body_avail_),
1340 117 body_buf_->data()));
1341 117 body_buf_->consume(body_avail_);
1342 117 body_avail_ = 0;
1343
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 117 BOOST_ASSERT(
1344 body_buf_->size() == 0);
1345 117 st_ = state::body;
1346 }
1347
1348 } // http_proto
1349 } // boost
1350
1351 #endif
1352