|
0
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
|
4 */
|
|
|
5
|
|
|
6
|
|
|
7 #include <ngx_config.h>
|
|
|
8 #include <ngx_core.h>
|
|
|
9 #include <ngx_http.h>
|
|
|
10
|
|
|
11
|
|
58
|
12 ngx_int_t
|
|
|
13 ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
|
|
0
|
14 {
|
|
56
|
15 u_char c, ch, *p, *m;
|
|
0
|
16 enum {
|
|
|
17 sw_start = 0,
|
|
|
18 sw_method,
|
|
|
19 sw_space_after_method,
|
|
|
20 sw_spaces_before_uri,
|
|
|
21 sw_schema,
|
|
|
22 sw_schema_slash,
|
|
|
23 sw_schema_slash_slash,
|
|
|
24 sw_host,
|
|
|
25 sw_port,
|
|
|
26 sw_after_slash_in_uri,
|
|
|
27 sw_check_uri,
|
|
|
28 sw_uri,
|
|
|
29 sw_http_09,
|
|
|
30 sw_http_H,
|
|
|
31 sw_http_HT,
|
|
|
32 sw_http_HTT,
|
|
|
33 sw_http_HTTP,
|
|
|
34 sw_first_major_digit,
|
|
|
35 sw_major_digit,
|
|
|
36 sw_first_minor_digit,
|
|
|
37 sw_minor_digit,
|
|
28
|
38 sw_almost_done
|
|
0
|
39 } state;
|
|
|
40
|
|
|
41 state = r->state;
|
|
|
42
|
|
28
|
43 for (p = b->pos; p < b->last; p++) {
|
|
|
44 ch = *p;
|
|
0
|
45
|
|
|
46 /* gcc 2.95.2 and msvc 6.0 compile this switch as an jump table */
|
|
|
47
|
|
|
48 switch (state) {
|
|
|
49
|
|
|
50 /* HTTP methods: GET, HEAD, POST */
|
|
|
51 case sw_start:
|
|
28
|
52 r->request_start = p;
|
|
0
|
53
|
|
|
54 if (ch == CR || ch == LF) {
|
|
|
55 break;
|
|
|
56 }
|
|
|
57
|
|
|
58 if (ch < 'A' || ch > 'Z') {
|
|
|
59 return NGX_HTTP_PARSE_INVALID_METHOD;
|
|
|
60 }
|
|
|
61
|
|
|
62 state = sw_method;
|
|
|
63 break;
|
|
|
64
|
|
|
65 case sw_method:
|
|
|
66 if (ch == ' ') {
|
|
58
|
67 r->method_end = p - 1;
|
|
0
|
68 m = r->request_start;
|
|
|
69
|
|
28
|
70 if (p - m == 3) {
|
|
0
|
71
|
|
|
72 if (m[0] == 'G' && m[1] == 'E' && m[2] == 'T') {
|
|
|
73 r->method = NGX_HTTP_GET;
|
|
|
74 }
|
|
|
75
|
|
28
|
76 } else if (p - m == 4) {
|
|
0
|
77
|
|
|
78 if (m[0] == 'P' && m[1] == 'O'
|
|
28
|
79 && m[2] == 'S' && m[3] == 'T')
|
|
0
|
80 {
|
|
|
81 r->method = NGX_HTTP_POST;
|
|
|
82
|
|
|
83 } else if (m[0] == 'H' && m[1] == 'E'
|
|
|
84 && m[2] == 'A' && m[3] == 'D')
|
|
|
85 {
|
|
|
86 r->method = NGX_HTTP_HEAD;
|
|
|
87 }
|
|
|
88 }
|
|
|
89
|
|
|
90 state = sw_spaces_before_uri;
|
|
|
91 break;
|
|
|
92 }
|
|
|
93
|
|
|
94 if (ch < 'A' || ch > 'Z') {
|
|
|
95 return NGX_HTTP_PARSE_INVALID_METHOD;
|
|
|
96 }
|
|
|
97
|
|
|
98 break;
|
|
|
99
|
|
|
100 /* single space after method */
|
|
|
101 case sw_space_after_method:
|
|
|
102 switch (ch) {
|
|
|
103 case ' ':
|
|
|
104 state = sw_spaces_before_uri;
|
|
|
105 break;
|
|
|
106 default:
|
|
|
107 return NGX_HTTP_PARSE_INVALID_METHOD;
|
|
|
108 }
|
|
|
109 break;
|
|
|
110
|
|
|
111 /* space* before URI */
|
|
|
112 case sw_spaces_before_uri:
|
|
56
|
113
|
|
|
114 c = (u_char) (ch | 0x20);
|
|
70
|
115 if (c >= 'a' && c <= 'z') {
|
|
38
|
116 r->schema_start = p;
|
|
|
117 state = sw_schema;
|
|
|
118 break;
|
|
|
119 }
|
|
|
120
|
|
0
|
121 switch (ch) {
|
|
|
122 case '/':
|
|
28
|
123 r->uri_start = p;
|
|
0
|
124 state = sw_after_slash_in_uri;
|
|
|
125 break;
|
|
|
126 case ' ':
|
|
|
127 break;
|
|
|
128 default:
|
|
|
129 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
130 }
|
|
|
131 break;
|
|
|
132
|
|
|
133 case sw_schema:
|
|
56
|
134
|
|
|
135 c = (u_char) (ch | 0x20);
|
|
70
|
136 if (c >= 'a' && c <= 'z') {
|
|
38
|
137 break;
|
|
|
138 }
|
|
|
139
|
|
0
|
140 switch (ch) {
|
|
|
141 case ':':
|
|
28
|
142 r->schema_end = p;
|
|
0
|
143 state = sw_schema_slash;
|
|
|
144 break;
|
|
|
145 default:
|
|
|
146 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
147 }
|
|
|
148 break;
|
|
|
149
|
|
|
150 case sw_schema_slash:
|
|
|
151 switch (ch) {
|
|
|
152 case '/':
|
|
|
153 state = sw_schema_slash_slash;
|
|
|
154 break;
|
|
|
155 default:
|
|
|
156 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
157 }
|
|
|
158 break;
|
|
|
159
|
|
|
160 case sw_schema_slash_slash:
|
|
|
161 switch (ch) {
|
|
|
162 case '/':
|
|
28
|
163 r->host_start = p;
|
|
0
|
164 state = sw_host;
|
|
|
165 break;
|
|
|
166 default:
|
|
|
167 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
168 }
|
|
|
169 break;
|
|
|
170
|
|
|
171 case sw_host:
|
|
56
|
172
|
|
|
173 c = (u_char) (ch | 0x20);
|
|
70
|
174 if (c >= 'a' && c <= 'z') {
|
|
56
|
175 break;
|
|
|
176 }
|
|
|
177
|
|
|
178 if ((ch >= '0' && ch <= '9') || ch == '.' || ch == '-')
|
|
38
|
179 {
|
|
|
180 break;
|
|
|
181 }
|
|
|
182
|
|
0
|
183 switch (ch) {
|
|
|
184 case ':':
|
|
28
|
185 r->host_end = p;
|
|
0
|
186 state = sw_port;
|
|
|
187 break;
|
|
|
188 case '/':
|
|
28
|
189 r->host_end = p;
|
|
|
190 r->uri_start = p;
|
|
0
|
191 state = sw_after_slash_in_uri;
|
|
|
192 break;
|
|
|
193 default:
|
|
|
194 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
195 }
|
|
|
196 break;
|
|
|
197
|
|
|
198 case sw_port:
|
|
38
|
199 if (ch >= '0' && ch <= '9') {
|
|
|
200 break;
|
|
|
201 }
|
|
|
202
|
|
0
|
203 switch (ch) {
|
|
|
204 case '/':
|
|
28
|
205 r->port_end = p;
|
|
|
206 r->uri_start = p;
|
|
0
|
207 state = sw_after_slash_in_uri;
|
|
|
208 break;
|
|
|
209 default:
|
|
38
|
210 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
0
|
211 }
|
|
|
212 break;
|
|
|
213
|
|
10
|
214 /* check "/.", "//", "%", and "\" (Win32) in URI */
|
|
0
|
215 case sw_after_slash_in_uri:
|
|
38
|
216
|
|
56
|
217 c = (u_char) (ch | 0x20);
|
|
70
|
218 if (c >= 'a' && c <= 'z') {
|
|
56
|
219 state = sw_check_uri;
|
|
|
220 break;
|
|
|
221 }
|
|
|
222
|
|
|
223 if (ch >= '0' && ch <= '9') {
|
|
38
|
224 state = sw_check_uri;
|
|
|
225 break;
|
|
|
226 }
|
|
|
227
|
|
0
|
228 switch (ch) {
|
|
38
|
229 case ' ':
|
|
|
230 r->uri_end = p;
|
|
|
231 state = sw_http_09;
|
|
|
232 break;
|
|
0
|
233 case CR:
|
|
28
|
234 r->uri_end = p;
|
|
0
|
235 r->http_minor = 9;
|
|
|
236 state = sw_almost_done;
|
|
|
237 break;
|
|
|
238 case LF:
|
|
28
|
239 r->uri_end = p;
|
|
0
|
240 r->http_minor = 9;
|
|
28
|
241 goto done;
|
|
0
|
242 case '.':
|
|
2
|
243 r->complex_uri = 1;
|
|
|
244 state = sw_uri;
|
|
|
245 break;
|
|
0
|
246 case '%':
|
|
2
|
247 r->quoted_uri = 1;
|
|
0
|
248 state = sw_uri;
|
|
|
249 break;
|
|
38
|
250 case '/':
|
|
|
251 r->complex_uri = 1;
|
|
|
252 state = sw_uri;
|
|
|
253 break;
|
|
10
|
254 #if (NGX_WIN32)
|
|
|
255 case '\\':
|
|
|
256 r->complex_uri = 1;
|
|
38
|
257 state = sw_uri;
|
|
10
|
258 break;
|
|
|
259 #endif
|
|
38
|
260 case '?':
|
|
|
261 r->args_start = p + 1;
|
|
|
262 state = sw_uri;
|
|
0
|
263 break;
|
|
34
|
264 case '+':
|
|
|
265 r->plus_in_uri = 1;
|
|
|
266 break;
|
|
38
|
267 case '\0':
|
|
|
268 r->zero_in_uri = 1;
|
|
0
|
269 break;
|
|
|
270 default:
|
|
|
271 state = sw_check_uri;
|
|
|
272 break;
|
|
|
273 }
|
|
|
274 break;
|
|
|
275
|
|
10
|
276 /* check "/", "%" and "\" (Win32) in URI */
|
|
0
|
277 case sw_check_uri:
|
|
38
|
278
|
|
56
|
279 c = (u_char) (ch | 0x20);
|
|
70
|
280 if (c >= 'a' && c <= 'z') {
|
|
56
|
281 break;
|
|
|
282 }
|
|
|
283
|
|
|
284 if (ch >= '0' && ch <= '9') {
|
|
38
|
285 break;
|
|
|
286 }
|
|
|
287
|
|
0
|
288 switch (ch) {
|
|
38
|
289 case '/':
|
|
|
290 r->uri_ext = NULL;
|
|
|
291 state = sw_after_slash_in_uri;
|
|
|
292 break;
|
|
|
293 case '.':
|
|
|
294 r->uri_ext = p + 1;
|
|
|
295 break;
|
|
|
296 case ' ':
|
|
|
297 r->uri_end = p;
|
|
|
298 state = sw_http_09;
|
|
|
299 break;
|
|
0
|
300 case CR:
|
|
28
|
301 r->uri_end = p;
|
|
0
|
302 r->http_minor = 9;
|
|
|
303 state = sw_almost_done;
|
|
|
304 break;
|
|
|
305 case LF:
|
|
28
|
306 r->uri_end = p;
|
|
0
|
307 r->http_minor = 9;
|
|
28
|
308 goto done;
|
|
10
|
309 #if (NGX_WIN32)
|
|
|
310 case '\\':
|
|
|
311 r->complex_uri = 1;
|
|
|
312 state = sw_after_slash_in_uri;
|
|
|
313 break;
|
|
|
314 #endif
|
|
38
|
315 case '%':
|
|
|
316 r->quoted_uri = 1;
|
|
|
317 state = sw_uri;
|
|
0
|
318 break;
|
|
34
|
319 case '+':
|
|
|
320 r->plus_in_uri = 1;
|
|
|
321 break;
|
|
0
|
322 case '?':
|
|
28
|
323 r->args_start = p + 1;
|
|
0
|
324 state = sw_uri;
|
|
|
325 break;
|
|
38
|
326 case '\0':
|
|
|
327 r->zero_in_uri = 1;
|
|
|
328 break;
|
|
0
|
329 }
|
|
|
330 break;
|
|
|
331
|
|
|
332 /* URI */
|
|
|
333 case sw_uri:
|
|
|
334 switch (ch) {
|
|
38
|
335 case ' ':
|
|
|
336 r->uri_end = p;
|
|
|
337 state = sw_http_09;
|
|
|
338 break;
|
|
0
|
339 case CR:
|
|
28
|
340 r->uri_end = p;
|
|
0
|
341 r->http_minor = 9;
|
|
|
342 state = sw_almost_done;
|
|
|
343 break;
|
|
|
344 case LF:
|
|
28
|
345 r->uri_end = p;
|
|
0
|
346 r->http_minor = 9;
|
|
28
|
347 goto done;
|
|
34
|
348 case '+':
|
|
|
349 r->plus_in_uri = 1;
|
|
|
350 break;
|
|
38
|
351 case '\0':
|
|
|
352 r->zero_in_uri = 1;
|
|
0
|
353 break;
|
|
|
354 }
|
|
|
355 break;
|
|
|
356
|
|
|
357 /* space+ after URI */
|
|
|
358 case sw_http_09:
|
|
|
359 switch (ch) {
|
|
|
360 case ' ':
|
|
|
361 break;
|
|
|
362 case CR:
|
|
|
363 r->http_minor = 9;
|
|
|
364 state = sw_almost_done;
|
|
|
365 break;
|
|
|
366 case LF:
|
|
|
367 r->http_minor = 9;
|
|
28
|
368 goto done;
|
|
0
|
369 case 'H':
|
|
28
|
370 r->http_protocol.data = p;
|
|
0
|
371 state = sw_http_H;
|
|
|
372 break;
|
|
|
373 default:
|
|
|
374 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
375 }
|
|
|
376 break;
|
|
|
377
|
|
|
378 case sw_http_H:
|
|
|
379 switch (ch) {
|
|
|
380 case 'T':
|
|
|
381 state = sw_http_HT;
|
|
|
382 break;
|
|
|
383 default:
|
|
|
384 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
385 }
|
|
|
386 break;
|
|
|
387
|
|
|
388 case sw_http_HT:
|
|
|
389 switch (ch) {
|
|
|
390 case 'T':
|
|
|
391 state = sw_http_HTT;
|
|
|
392 break;
|
|
|
393 default:
|
|
|
394 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
395 }
|
|
|
396 break;
|
|
|
397
|
|
|
398 case sw_http_HTT:
|
|
|
399 switch (ch) {
|
|
|
400 case 'P':
|
|
|
401 state = sw_http_HTTP;
|
|
|
402 break;
|
|
|
403 default:
|
|
|
404 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
405 }
|
|
|
406 break;
|
|
|
407
|
|
|
408 case sw_http_HTTP:
|
|
|
409 switch (ch) {
|
|
|
410 case '/':
|
|
|
411 state = sw_first_major_digit;
|
|
|
412 break;
|
|
|
413 default:
|
|
|
414 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
415 }
|
|
|
416 break;
|
|
|
417
|
|
|
418 /* first digit of major HTTP version */
|
|
|
419 case sw_first_major_digit:
|
|
|
420 if (ch < '1' || ch > '9') {
|
|
|
421 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
422 }
|
|
|
423
|
|
|
424 r->http_major = ch - '0';
|
|
|
425 state = sw_major_digit;
|
|
|
426 break;
|
|
|
427
|
|
|
428 /* major HTTP version or dot */
|
|
|
429 case sw_major_digit:
|
|
|
430 if (ch == '.') {
|
|
|
431 state = sw_first_minor_digit;
|
|
|
432 break;
|
|
|
433 }
|
|
|
434
|
|
|
435 if (ch < '0' || ch > '9') {
|
|
|
436 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
437 }
|
|
|
438
|
|
|
439 r->http_major = r->http_major * 10 + ch - '0';
|
|
|
440 break;
|
|
|
441
|
|
|
442 /* first digit of minor HTTP version */
|
|
|
443 case sw_first_minor_digit:
|
|
|
444 if (ch < '0' || ch > '9') {
|
|
|
445 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
446 }
|
|
|
447
|
|
|
448 r->http_minor = ch - '0';
|
|
|
449 state = sw_minor_digit;
|
|
|
450 break;
|
|
|
451
|
|
|
452 /* minor HTTP version or end of request line */
|
|
|
453 case sw_minor_digit:
|
|
|
454 if (ch == CR) {
|
|
|
455 state = sw_almost_done;
|
|
|
456 break;
|
|
|
457 }
|
|
|
458
|
|
|
459 if (ch == LF) {
|
|
28
|
460 goto done;
|
|
0
|
461 }
|
|
|
462
|
|
|
463 if (ch < '0' || ch > '9') {
|
|
|
464 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
465 }
|
|
|
466
|
|
|
467 r->http_minor = r->http_minor * 10 + ch - '0';
|
|
|
468 break;
|
|
|
469
|
|
|
470 /* end of request line */
|
|
|
471 case sw_almost_done:
|
|
28
|
472 r->request_end = p - 1;
|
|
0
|
473 switch (ch) {
|
|
|
474 case LF:
|
|
28
|
475 goto done;
|
|
0
|
476 default:
|
|
|
477 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
478 }
|
|
|
479 }
|
|
|
480 }
|
|
|
481
|
|
|
482 b->pos = p;
|
|
28
|
483 r->state = state;
|
|
0
|
484
|
|
28
|
485 return NGX_AGAIN;
|
|
0
|
486
|
|
28
|
487 done:
|
|
|
488
|
|
|
489 b->pos = p + 1;
|
|
0
|
490
|
|
28
|
491 if (r->request_end == NULL) {
|
|
|
492 r->request_end = p;
|
|
|
493 }
|
|
0
|
494
|
|
28
|
495 r->http_version = r->http_major * 1000 + r->http_minor;
|
|
|
496 r->state = sw_start;
|
|
0
|
497
|
|
28
|
498 if (r->http_version == 9 && r->method != NGX_HTTP_GET) {
|
|
|
499 return NGX_HTTP_PARSE_INVALID_09_METHOD;
|
|
0
|
500 }
|
|
28
|
501
|
|
|
502 return NGX_OK;
|
|
0
|
503 }
|
|
|
504
|
|
|
505
|
|
58
|
506 ngx_int_t
|
|
|
507 ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b)
|
|
0
|
508 {
|
|
56
|
509 u_char c, ch, *p;
|
|
|
510 ngx_uint_t hash;
|
|
0
|
511 enum {
|
|
|
512 sw_start = 0,
|
|
|
513 sw_name,
|
|
|
514 sw_space_before_value,
|
|
|
515 sw_value,
|
|
|
516 sw_space_after_value,
|
|
52
|
517 sw_ignore_line,
|
|
0
|
518 sw_almost_done,
|
|
52
|
519 sw_header_almost_done
|
|
0
|
520 } state;
|
|
|
521
|
|
|
522 state = r->state;
|
|
56
|
523 hash = r->header_hash;
|
|
0
|
524
|
|
28
|
525 for (p = b->pos; p < b->last; p++) {
|
|
|
526 ch = *p;
|
|
0
|
527
|
|
|
528 switch (state) {
|
|
|
529
|
|
|
530 /* first char */
|
|
|
531 case sw_start:
|
|
60
|
532 r->invalid_header = 0;
|
|
|
533
|
|
0
|
534 switch (ch) {
|
|
|
535 case CR:
|
|
28
|
536 r->header_end = p;
|
|
0
|
537 state = sw_header_almost_done;
|
|
|
538 break;
|
|
|
539 case LF:
|
|
28
|
540 r->header_end = p;
|
|
|
541 goto header_done;
|
|
0
|
542 default:
|
|
|
543 state = sw_name;
|
|
28
|
544 r->header_name_start = p;
|
|
0
|
545
|
|
|
546 c = (u_char) (ch | 0x20);
|
|
|
547 if (c >= 'a' && c <= 'z') {
|
|
56
|
548 hash = c;
|
|
0
|
549 break;
|
|
|
550 }
|
|
|
551
|
|
|
552 if (ch >= '0' && ch <= '9') {
|
|
56
|
553 hash = ch;
|
|
0
|
554 break;
|
|
|
555 }
|
|
|
556
|
|
60
|
557 r->invalid_header = 1;
|
|
|
558
|
|
52
|
559 break;
|
|
0
|
560
|
|
|
561 }
|
|
|
562 break;
|
|
|
563
|
|
|
564 /* header name */
|
|
|
565 case sw_name:
|
|
|
566 c = (u_char) (ch | 0x20);
|
|
|
567 if (c >= 'a' && c <= 'z') {
|
|
56
|
568 hash += c;
|
|
0
|
569 break;
|
|
|
570 }
|
|
|
571
|
|
|
572 if (ch == ':') {
|
|
28
|
573 r->header_name_end = p;
|
|
0
|
574 state = sw_space_before_value;
|
|
|
575 break;
|
|
|
576 }
|
|
|
577
|
|
52
|
578 if (ch == '-') {
|
|
56
|
579 hash += ch;
|
|
0
|
580 break;
|
|
|
581 }
|
|
|
582
|
|
|
583 if (ch >= '0' && ch <= '9') {
|
|
56
|
584 hash += ch;
|
|
0
|
585 break;
|
|
|
586 }
|
|
|
587
|
|
58
|
588 if (ch == CR) {
|
|
|
589 r->header_name_end = p;
|
|
|
590 r->header_start = p;
|
|
|
591 r->header_end = p;
|
|
|
592 state = sw_almost_done;
|
|
|
593 break;
|
|
|
594 }
|
|
|
595
|
|
|
596 if (ch == LF) {
|
|
|
597 r->header_name_end = p;
|
|
|
598 r->header_start = p;
|
|
|
599 r->header_end = p;
|
|
|
600 goto done;
|
|
|
601 }
|
|
|
602
|
|
2
|
603 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
|
0
|
604 if (ch == '/'
|
|
58
|
605 && r->upstream
|
|
|
606 && p - r->header_name_start == 4
|
|
|
607 && ngx_strncmp(r->header_name_start, "HTTP", 4) == 0)
|
|
0
|
608 {
|
|
|
609 state = sw_ignore_line;
|
|
|
610 break;
|
|
|
611 }
|
|
|
612
|
|
60
|
613 r->invalid_header = 1;
|
|
|
614
|
|
52
|
615 break;
|
|
0
|
616
|
|
|
617 /* space* before header value */
|
|
|
618 case sw_space_before_value:
|
|
|
619 switch (ch) {
|
|
|
620 case ' ':
|
|
|
621 break;
|
|
|
622 case CR:
|
|
58
|
623 r->header_start = p;
|
|
|
624 r->header_end = p;
|
|
0
|
625 state = sw_almost_done;
|
|
|
626 break;
|
|
|
627 case LF:
|
|
58
|
628 r->header_start = p;
|
|
|
629 r->header_end = p;
|
|
28
|
630 goto done;
|
|
0
|
631 default:
|
|
28
|
632 r->header_start = p;
|
|
0
|
633 state = sw_value;
|
|
|
634 break;
|
|
|
635 }
|
|
|
636 break;
|
|
|
637
|
|
|
638 /* header value */
|
|
|
639 case sw_value:
|
|
|
640 switch (ch) {
|
|
|
641 case ' ':
|
|
28
|
642 r->header_end = p;
|
|
0
|
643 state = sw_space_after_value;
|
|
|
644 break;
|
|
|
645 case CR:
|
|
28
|
646 r->header_end = p;
|
|
0
|
647 state = sw_almost_done;
|
|
|
648 break;
|
|
|
649 case LF:
|
|
28
|
650 r->header_end = p;
|
|
|
651 goto done;
|
|
0
|
652 }
|
|
|
653 break;
|
|
|
654
|
|
|
655 /* space* before end of header line */
|
|
|
656 case sw_space_after_value:
|
|
|
657 switch (ch) {
|
|
|
658 case ' ':
|
|
|
659 break;
|
|
|
660 case CR:
|
|
|
661 state = sw_almost_done;
|
|
|
662 break;
|
|
|
663 case LF:
|
|
28
|
664 goto done;
|
|
0
|
665 default:
|
|
|
666 state = sw_value;
|
|
|
667 break;
|
|
|
668 }
|
|
|
669 break;
|
|
|
670
|
|
|
671 /* ignore header line */
|
|
|
672 case sw_ignore_line:
|
|
|
673 switch (ch) {
|
|
|
674 case LF:
|
|
|
675 state = sw_start;
|
|
|
676 break;
|
|
|
677 default:
|
|
|
678 break;
|
|
|
679 }
|
|
|
680 break;
|
|
|
681
|
|
|
682 /* end of header line */
|
|
|
683 case sw_almost_done:
|
|
|
684 switch (ch) {
|
|
172
|
685 case CR:
|
|
|
686 break;
|
|
0
|
687 case LF:
|
|
28
|
688 goto done;
|
|
0
|
689 default:
|
|
|
690 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
691 }
|
|
174
|
692 break;
|
|
0
|
693
|
|
|
694 /* end of header */
|
|
|
695 case sw_header_almost_done:
|
|
|
696 switch (ch) {
|
|
|
697 case LF:
|
|
28
|
698 goto header_done;
|
|
0
|
699 default:
|
|
|
700 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
701 }
|
|
|
702 }
|
|
|
703 }
|
|
|
704
|
|
|
705 b->pos = p;
|
|
28
|
706 r->state = state;
|
|
56
|
707 r->header_hash = hash;
|
|
0
|
708
|
|
28
|
709 return NGX_AGAIN;
|
|
|
710
|
|
|
711 done:
|
|
|
712
|
|
|
713 b->pos = p + 1;
|
|
|
714 r->state = sw_start;
|
|
56
|
715 r->header_hash = hash;
|
|
0
|
716
|
|
28
|
717 return NGX_OK;
|
|
|
718
|
|
|
719 header_done:
|
|
0
|
720
|
|
28
|
721 b->pos = p + 1;
|
|
|
722 r->state = sw_start;
|
|
|
723
|
|
|
724 return NGX_HTTP_PARSE_HEADER_DONE;
|
|
0
|
725 }
|
|
|
726
|
|
|
727
|
|
58
|
728 ngx_int_t
|
|
|
729 ngx_http_parse_complex_uri(ngx_http_request_t *r)
|
|
0
|
730 {
|
|
|
731 u_char c, ch, decoded, *p, *u;
|
|
|
732 enum {
|
|
|
733 sw_usual = 0,
|
|
|
734 sw_slash,
|
|
|
735 sw_dot,
|
|
|
736 sw_dot_dot,
|
|
10
|
737 #if (NGX_WIN32)
|
|
0
|
738 sw_dot_dot_dot,
|
|
|
739 #endif
|
|
|
740 sw_quoted,
|
|
|
741 sw_quoted_second
|
|
|
742 } state, quoted_state;
|
|
|
743
|
|
28
|
744 #if (NGX_SUPPRESS_WARN)
|
|
0
|
745 decoded = '\0';
|
|
|
746 quoted_state = sw_usual;
|
|
28
|
747 #endif
|
|
0
|
748
|
|
|
749 state = sw_usual;
|
|
|
750 p = r->uri_start;
|
|
|
751 u = r->uri.data;
|
|
|
752 r->uri_ext = NULL;
|
|
10
|
753 r->args_start = NULL;
|
|
0
|
754
|
|
|
755 ch = *p++;
|
|
|
756
|
|
28
|
757 while (p <= r->uri_end) {
|
|
10
|
758
|
|
|
759 /*
|
|
28
|
760 * we use "ch = *p++" inside the cycle, but this operation is safe,
|
|
10
|
761 * because after the URI there is always at least one charcter:
|
|
|
762 * the line feed
|
|
|
763 */
|
|
0
|
764
|
|
|
765 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
10
|
766 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
|
0
|
767
|
|
|
768 switch (state) {
|
|
122
|
769
|
|
0
|
770 case sw_usual:
|
|
|
771 switch(ch) {
|
|
10
|
772 #if (NGX_WIN32)
|
|
|
773 case '\\':
|
|
|
774 r->uri_ext = NULL;
|
|
|
775
|
|
|
776 if (p == r->uri_start + r->uri.len) {
|
|
|
777
|
|
|
778 /*
|
|
|
779 * we omit the last "\" to cause redirect because
|
|
|
780 * the browsers do not treat "\" as "/" in relative URL path
|
|
|
781 */
|
|
|
782
|
|
|
783 break;
|
|
|
784 }
|
|
|
785
|
|
|
786 state = sw_slash;
|
|
|
787 *u++ = '/';
|
|
|
788 break;
|
|
|
789 #endif
|
|
0
|
790 case '/':
|
|
|
791 r->uri_ext = NULL;
|
|
|
792 state = sw_slash;
|
|
|
793 *u++ = ch;
|
|
|
794 break;
|
|
|
795 case '%':
|
|
|
796 quoted_state = state;
|
|
|
797 state = sw_quoted;
|
|
|
798 break;
|
|
10
|
799 case '?':
|
|
|
800 r->args_start = p;
|
|
28
|
801 goto done;
|
|
0
|
802 case '.':
|
|
|
803 r->uri_ext = u + 1;
|
|
22
|
804 *u++ = ch;
|
|
|
805 break;
|
|
0
|
806 default:
|
|
|
807 *u++ = ch;
|
|
|
808 break;
|
|
|
809 }
|
|
|
810 ch = *p++;
|
|
|
811 break;
|
|
|
812
|
|
|
813 case sw_slash:
|
|
|
814 switch(ch) {
|
|
10
|
815 #if (NGX_WIN32)
|
|
|
816 case '\\':
|
|
|
817 #endif
|
|
0
|
818 case '/':
|
|
|
819 break;
|
|
|
820 case '.':
|
|
|
821 state = sw_dot;
|
|
|
822 *u++ = ch;
|
|
|
823 break;
|
|
|
824 case '%':
|
|
|
825 quoted_state = state;
|
|
|
826 state = sw_quoted;
|
|
|
827 break;
|
|
28
|
828 case '?':
|
|
|
829 r->args_start = p;
|
|
|
830 goto done;
|
|
0
|
831 default:
|
|
|
832 state = sw_usual;
|
|
|
833 *u++ = ch;
|
|
|
834 break;
|
|
|
835 }
|
|
|
836 ch = *p++;
|
|
|
837 break;
|
|
|
838
|
|
|
839 case sw_dot:
|
|
|
840 switch(ch) {
|
|
10
|
841 #if (NGX_WIN32)
|
|
|
842 case '\\':
|
|
|
843 #endif
|
|
0
|
844 case '/':
|
|
|
845 state = sw_slash;
|
|
|
846 u--;
|
|
|
847 break;
|
|
|
848 case '.':
|
|
|
849 state = sw_dot_dot;
|
|
|
850 *u++ = ch;
|
|
|
851 break;
|
|
|
852 case '%':
|
|
|
853 quoted_state = state;
|
|
|
854 state = sw_quoted;
|
|
|
855 break;
|
|
28
|
856 case '?':
|
|
|
857 r->args_start = p;
|
|
|
858 goto done;
|
|
0
|
859 default:
|
|
|
860 state = sw_usual;
|
|
|
861 *u++ = ch;
|
|
|
862 break;
|
|
|
863 }
|
|
|
864 ch = *p++;
|
|
|
865 break;
|
|
|
866
|
|
|
867 case sw_dot_dot:
|
|
|
868 switch(ch) {
|
|
10
|
869 #if (NGX_WIN32)
|
|
|
870 case '\\':
|
|
|
871 #endif
|
|
0
|
872 case '/':
|
|
|
873 state = sw_slash;
|
|
|
874 u -= 4;
|
|
|
875 if (u < r->uri.data) {
|
|
|
876 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
877 }
|
|
|
878 while (*(u - 1) != '/') {
|
|
|
879 u--;
|
|
|
880 }
|
|
|
881 break;
|
|
|
882 case '%':
|
|
|
883 quoted_state = state;
|
|
|
884 state = sw_quoted;
|
|
|
885 break;
|
|
28
|
886 case '?':
|
|
|
887 r->args_start = p;
|
|
|
888 goto done;
|
|
10
|
889 #if (NGX_WIN32)
|
|
0
|
890 case '.':
|
|
|
891 state = sw_dot_dot_dot;
|
|
|
892 *u++ = ch;
|
|
|
893 break;
|
|
|
894 #endif
|
|
|
895 default:
|
|
|
896 state = sw_usual;
|
|
|
897 *u++ = ch;
|
|
|
898 break;
|
|
|
899 }
|
|
|
900 ch = *p++;
|
|
|
901 break;
|
|
|
902
|
|
10
|
903 #if (NGX_WIN32)
|
|
0
|
904 case sw_dot_dot_dot:
|
|
|
905 switch(ch) {
|
|
10
|
906 case '\\':
|
|
0
|
907 case '/':
|
|
|
908 state = sw_slash;
|
|
|
909 u -= 5;
|
|
|
910 if (u < r->uri.data) {
|
|
|
911 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
912 }
|
|
|
913 while (*u != '/') {
|
|
|
914 u--;
|
|
|
915 }
|
|
|
916 if (u < r->uri.data) {
|
|
|
917 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
918 }
|
|
|
919 while (*(u - 1) != '/') {
|
|
|
920 u--;
|
|
|
921 }
|
|
|
922 break;
|
|
|
923 case '%':
|
|
|
924 quoted_state = state;
|
|
|
925 state = sw_quoted;
|
|
|
926 break;
|
|
122
|
927 case '?':
|
|
|
928 r->args_start = p;
|
|
|
929 goto done;
|
|
0
|
930 default:
|
|
|
931 state = sw_usual;
|
|
|
932 *u++ = ch;
|
|
|
933 break;
|
|
|
934 }
|
|
|
935 ch = *p++;
|
|
|
936 break;
|
|
|
937 #endif
|
|
|
938
|
|
|
939 case sw_quoted:
|
|
|
940 if (ch >= '0' && ch <= '9') {
|
|
|
941 decoded = (u_char) (ch - '0');
|
|
|
942 state = sw_quoted_second;
|
|
|
943 ch = *p++;
|
|
|
944 break;
|
|
|
945 }
|
|
|
946
|
|
|
947 c = (u_char) (ch | 0x20);
|
|
|
948 if (c >= 'a' && c <= 'f') {
|
|
|
949 decoded = (u_char) (c - 'a' + 10);
|
|
|
950 state = sw_quoted_second;
|
|
|
951 ch = *p++;
|
|
|
952 break;
|
|
|
953 }
|
|
|
954
|
|
|
955 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
956
|
|
|
957 case sw_quoted_second:
|
|
|
958 if (ch >= '0' && ch <= '9') {
|
|
|
959 ch = (u_char) ((decoded << 4) + ch - '0');
|
|
38
|
960
|
|
0
|
961 if (ch == '%') {
|
|
|
962 state = sw_usual;
|
|
|
963 *u++ = ch;
|
|
|
964 ch = *p++;
|
|
|
965 break;
|
|
|
966 }
|
|
38
|
967
|
|
|
968 if (ch == '\0') {
|
|
|
969 r->zero_in_uri = 1;
|
|
|
970 *u++ = ch;
|
|
|
971 ch = *p++;
|
|
|
972 }
|
|
|
973
|
|
0
|
974 state = quoted_state;
|
|
|
975 break;
|
|
|
976 }
|
|
|
977
|
|
|
978 c = (u_char) (ch | 0x20);
|
|
|
979 if (c >= 'a' && c <= 'f') {
|
|
|
980 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
|
28
|
981 if (ch == '?') {
|
|
0
|
982 *u++ = ch;
|
|
|
983 ch = *p++;
|
|
|
984 }
|
|
|
985 state = quoted_state;
|
|
|
986 break;
|
|
|
987 }
|
|
|
988
|
|
|
989 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
990 }
|
|
|
991 }
|
|
|
992
|
|
28
|
993 done:
|
|
|
994
|
|
0
|
995 r->uri.len = u - r->uri.data;
|
|
|
996 r->uri.data[r->uri.len] = '\0';
|
|
|
997
|
|
|
998 if (r->uri_ext) {
|
|
|
999 r->exten.len = u - r->uri_ext;
|
|
10
|
1000 r->exten.data = r->uri_ext;
|
|
0
|
1001 }
|
|
|
1002
|
|
|
1003 r->uri_ext = NULL;
|
|
|
1004
|
|
|
1005 return NGX_OK;
|
|
|
1006 }
|
|
58
|
1007
|
|
|
1008
|
|
|
1009 ngx_int_t
|
|
122
|
1010 ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
|
|
|
1011 ngx_str_t *args, ngx_uint_t *flags)
|
|
|
1012 {
|
|
|
1013 u_char ch, *p;
|
|
|
1014 size_t len;
|
|
|
1015
|
|
|
1016 len = uri->len;
|
|
|
1017 p = uri->data;
|
|
|
1018
|
|
|
1019 if (len == 0 || p[0] == '?') {
|
|
|
1020 goto unsafe;
|
|
|
1021 }
|
|
|
1022
|
|
|
1023 if (p[0] == '.' && len == 3 && p[1] == '.' && (p[2] == '/'
|
|
|
1024 #if (NGX_WIN32)
|
|
|
1025 || p[2] == '\\'
|
|
|
1026 #endif
|
|
|
1027 ))
|
|
|
1028 {
|
|
|
1029 goto unsafe;
|
|
|
1030 }
|
|
|
1031
|
|
|
1032 for ( /* void */ ; len; len--) {
|
|
|
1033
|
|
|
1034 ch = *p++;
|
|
|
1035
|
|
|
1036 if (ch == '?') {
|
|
|
1037 args->len = len - 1;
|
|
|
1038 args->data = p;
|
|
|
1039 uri->len -= len;
|
|
|
1040
|
|
|
1041 return NGX_OK;
|
|
|
1042 }
|
|
|
1043
|
|
|
1044 if (ch == '\0') {
|
|
|
1045 *flags |= NGX_HTTP_ZERO_IN_URI;
|
|
|
1046 continue;
|
|
|
1047 }
|
|
|
1048
|
|
|
1049 if (ch != '/'
|
|
|
1050 #if (NGX_WIN32)
|
|
|
1051 && ch != '\\'
|
|
|
1052 #endif
|
|
|
1053 )
|
|
|
1054 {
|
|
|
1055 continue;
|
|
|
1056 }
|
|
|
1057
|
|
|
1058 if (len > 2) {
|
|
|
1059
|
|
|
1060 /* detect "/../" */
|
|
|
1061
|
|
124
|
1062 if (p[0] == '.' && p[1] == '.' && p[2] == '/') {
|
|
122
|
1063 goto unsafe;
|
|
|
1064 }
|
|
|
1065
|
|
|
1066 #if (NGX_WIN32)
|
|
|
1067
|
|
|
1068 if (p[2] == '\\') {
|
|
|
1069 goto unsafe;
|
|
|
1070 }
|
|
|
1071
|
|
|
1072 if (len > 3) {
|
|
|
1073
|
|
|
1074 /* detect "/.../" */
|
|
|
1075
|
|
124
|
1076 if (p[0] == '.' && p[1] == '.' && p[2] == '.'
|
|
|
1077 && (p[3] == '/' || p[3] == '\\'))
|
|
|
1078 {
|
|
122
|
1079 goto unsafe;
|
|
|
1080 }
|
|
|
1081 }
|
|
|
1082 #endif
|
|
|
1083 }
|
|
|
1084 }
|
|
|
1085
|
|
|
1086 return NGX_OK;
|
|
|
1087
|
|
|
1088 unsafe:
|
|
|
1089
|
|
|
1090 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1091 "unsafe URI \"%V\" was detected", uri);
|
|
|
1092
|
|
|
1093 return NGX_ERROR;
|
|
|
1094 }
|
|
|
1095
|
|
|
1096
|
|
|
1097 ngx_int_t
|
|
58
|
1098 ngx_http_parse_multi_header_lines(ngx_array_t *headers, ngx_str_t *name,
|
|
|
1099 ngx_str_t *value)
|
|
|
1100 {
|
|
|
1101 ngx_uint_t i;
|
|
|
1102 u_char *start, *last, *end, ch;
|
|
|
1103 ngx_table_elt_t **h;
|
|
|
1104
|
|
|
1105 h = headers->elts;
|
|
|
1106
|
|
|
1107 for (i = 0; i < headers->nelts; i++) {
|
|
|
1108
|
|
|
1109 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, headers->pool->log, 0,
|
|
|
1110 "parse header: \"%V: %V\"", &h[i]->key, &h[i]->value);
|
|
|
1111
|
|
|
1112 if (name->len > h[i]->value.len) {
|
|
|
1113 continue;
|
|
|
1114 }
|
|
126
|
1115
|
|
58
|
1116 start = h[i]->value.data;
|
|
|
1117 end = h[i]->value.data + h[i]->value.len;
|
|
|
1118
|
|
|
1119 while (start < end) {
|
|
|
1120
|
|
|
1121 if (ngx_strncasecmp(start, name->data, name->len) != 0) {
|
|
|
1122 goto skip;
|
|
|
1123 }
|
|
|
1124
|
|
|
1125 for (start += name->len; start < end && *start == ' '; start++) {
|
|
|
1126 /* void */
|
|
|
1127 }
|
|
|
1128
|
|
|
1129 if (value == NULL) {
|
|
|
1130 if (start == end || *start == ',') {
|
|
|
1131 return i;
|
|
|
1132 }
|
|
|
1133
|
|
|
1134 goto skip;
|
|
|
1135 }
|
|
|
1136
|
|
|
1137 if (start == end || *start++ != '=') {
|
|
|
1138 /* the invalid header value */
|
|
|
1139 goto skip;
|
|
|
1140 }
|
|
|
1141
|
|
|
1142 while (start < end && *start == ' ') { start++; }
|
|
|
1143
|
|
|
1144 for (last = start; last < end && *last != ';'; last++) {
|
|
|
1145 /* void */
|
|
|
1146 }
|
|
|
1147
|
|
|
1148 value->len = last - start;
|
|
|
1149 value->data = start;
|
|
|
1150
|
|
|
1151 return i;
|
|
|
1152
|
|
|
1153 skip:
|
|
122
|
1154
|
|
58
|
1155 while (start < end) {
|
|
|
1156 ch = *start++;
|
|
|
1157 if (ch == ';' || ch == ',') {
|
|
|
1158 break;
|
|
|
1159 }
|
|
|
1160 }
|
|
|
1161
|
|
|
1162 while (start < end && *start == ' ') { start++; }
|
|
|
1163 }
|
|
|
1164 }
|
|
|
1165
|
|
|
1166 return NGX_DECLINED;
|
|
|
1167 }
|
