|
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
|
|
|
12 ngx_int_t ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
|
|
|
13 {
|
|
|
14 u_char ch, *p, *m;
|
|
|
15 enum {
|
|
|
16 sw_start = 0,
|
|
|
17 sw_method,
|
|
|
18 sw_space_after_method,
|
|
|
19 sw_spaces_before_uri,
|
|
|
20 sw_schema,
|
|
|
21 sw_schema_slash,
|
|
|
22 sw_schema_slash_slash,
|
|
|
23 sw_host,
|
|
|
24 sw_port,
|
|
|
25 sw_after_slash_in_uri,
|
|
|
26 sw_check_uri,
|
|
|
27 sw_uri,
|
|
|
28 sw_http_09,
|
|
|
29 sw_http_H,
|
|
|
30 sw_http_HT,
|
|
|
31 sw_http_HTT,
|
|
|
32 sw_http_HTTP,
|
|
|
33 sw_first_major_digit,
|
|
|
34 sw_major_digit,
|
|
|
35 sw_first_minor_digit,
|
|
|
36 sw_minor_digit,
|
|
|
37 sw_almost_done,
|
|
|
38 sw_done
|
|
|
39 } state;
|
|
|
40
|
|
|
41 state = r->state;
|
|
|
42 p = b->pos;
|
|
|
43
|
|
|
44 while (p < b->last && state < sw_done) {
|
|
|
45 ch = *p++;
|
|
|
46
|
|
|
47 /* gcc 2.95.2 and msvc 6.0 compile this switch as an jump table */
|
|
|
48
|
|
|
49 switch (state) {
|
|
|
50
|
|
|
51 /* HTTP methods: GET, HEAD, POST */
|
|
|
52 case sw_start:
|
|
|
53 r->request_start = p - 1;
|
|
|
54
|
|
|
55 if (ch == CR || ch == LF) {
|
|
|
56 break;
|
|
|
57 }
|
|
|
58
|
|
|
59 if (ch < 'A' || ch > 'Z') {
|
|
|
60 return NGX_HTTP_PARSE_INVALID_METHOD;
|
|
|
61 }
|
|
|
62
|
|
|
63 state = sw_method;
|
|
|
64 break;
|
|
|
65
|
|
|
66 case sw_method:
|
|
|
67 if (ch == ' ') {
|
|
|
68 r->method_end = p - 1;
|
|
|
69 m = r->request_start;
|
|
|
70
|
|
|
71 if (r->method_end - m == 3) {
|
|
|
72
|
|
|
73 if (m[0] == 'G' && m[1] == 'E' && m[2] == 'T') {
|
|
|
74 r->method = NGX_HTTP_GET;
|
|
|
75 }
|
|
|
76
|
|
|
77 } else if (r->method_end - m == 4) {
|
|
|
78
|
|
|
79 if (m[0] == 'P' && m[1] == 'O'
|
|
|
80 && m[2] == 'T' && m[3] == 'T')
|
|
|
81 {
|
|
|
82 r->method = NGX_HTTP_POST;
|
|
|
83
|
|
|
84 } else if (m[0] == 'H' && m[1] == 'E'
|
|
|
85 && m[2] == 'A' && m[3] == 'D')
|
|
|
86 {
|
|
|
87 r->method = NGX_HTTP_HEAD;
|
|
|
88 }
|
|
|
89 }
|
|
|
90
|
|
|
91 state = sw_spaces_before_uri;
|
|
|
92 break;
|
|
|
93 }
|
|
|
94
|
|
|
95 if (ch < 'A' || ch > 'Z') {
|
|
|
96 return NGX_HTTP_PARSE_INVALID_METHOD;
|
|
|
97 }
|
|
|
98
|
|
|
99 break;
|
|
|
100
|
|
|
101 /* single space after method */
|
|
|
102 case sw_space_after_method:
|
|
|
103 switch (ch) {
|
|
|
104 case ' ':
|
|
|
105 state = sw_spaces_before_uri;
|
|
|
106 break;
|
|
|
107 default:
|
|
|
108 return NGX_HTTP_PARSE_INVALID_METHOD;
|
|
|
109 }
|
|
|
110 break;
|
|
|
111
|
|
|
112 /* space* before URI */
|
|
|
113 case sw_spaces_before_uri:
|
|
|
114 switch (ch) {
|
|
|
115 case '/':
|
|
|
116 r->uri_start = p - 1;
|
|
|
117 state = sw_after_slash_in_uri;
|
|
|
118 break;
|
|
|
119 case ' ':
|
|
|
120 break;
|
|
|
121 default:
|
|
|
122 if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')) {
|
|
|
123 r->schema_start = p - 1;
|
|
|
124 state = sw_schema;
|
|
|
125 break;
|
|
|
126 }
|
|
|
127 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
128 }
|
|
|
129 break;
|
|
|
130
|
|
|
131 case sw_schema:
|
|
|
132 switch (ch) {
|
|
|
133 case ':':
|
|
|
134 r->schema_end = p - 1;
|
|
|
135 state = sw_schema_slash;
|
|
|
136 break;
|
|
|
137 default:
|
|
|
138 if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')) {
|
|
|
139 break;
|
|
|
140 }
|
|
|
141 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
142 }
|
|
|
143 break;
|
|
|
144
|
|
|
145 case sw_schema_slash:
|
|
|
146 switch (ch) {
|
|
|
147 case '/':
|
|
|
148 state = sw_schema_slash_slash;
|
|
|
149 break;
|
|
|
150 default:
|
|
|
151 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
152 }
|
|
|
153 break;
|
|
|
154
|
|
|
155 case sw_schema_slash_slash:
|
|
|
156 switch (ch) {
|
|
|
157 case '/':
|
|
|
158 r->host_start = p - 1;
|
|
|
159 state = sw_host;
|
|
|
160 break;
|
|
|
161 default:
|
|
|
162 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
163 }
|
|
|
164 break;
|
|
|
165
|
|
|
166 case sw_host:
|
|
|
167 switch (ch) {
|
|
|
168 case ':':
|
|
|
169 r->host_end = p - 1;
|
|
|
170 state = sw_port;
|
|
|
171 break;
|
|
|
172 case '/':
|
|
|
173 r->host_end = p - 1;
|
|
|
174 r->uri_start = p - 1;
|
|
|
175 state = sw_after_slash_in_uri;
|
|
|
176 break;
|
|
|
177 default:
|
|
|
178 if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')
|
|
|
179 || (ch >= '0' && ch <= '9') || ch == '.' || ch == '-')
|
|
|
180 {
|
|
|
181 break;
|
|
|
182 }
|
|
|
183 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
184 }
|
|
|
185 break;
|
|
|
186
|
|
|
187 case sw_port:
|
|
|
188 switch (ch) {
|
|
|
189 case '/':
|
|
|
190 r->port_end = p - 1;
|
|
|
191 r->uri_start = p - 1;
|
|
|
192 state = sw_after_slash_in_uri;
|
|
|
193 break;
|
|
|
194 default:
|
|
|
195 if (ch < '0' && ch > '9') {
|
|
|
196 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
197 }
|
|
|
198 break;
|
|
|
199 }
|
|
|
200 break;
|
|
|
201
|
|
10
|
202 /* check "/.", "//", "%", and "\" (Win32) in URI */
|
|
0
|
203 case sw_after_slash_in_uri:
|
|
|
204 switch (ch) {
|
|
|
205 case CR:
|
|
|
206 r->uri_end = p - 1;
|
|
|
207 r->http_minor = 9;
|
|
|
208 state = sw_almost_done;
|
|
|
209 break;
|
|
|
210 case LF:
|
|
|
211 r->uri_end = p - 1;
|
|
|
212 r->http_minor = 9;
|
|
|
213 state = sw_done;
|
|
|
214 break;
|
|
|
215 case ' ':
|
|
|
216 r->uri_end = p - 1;
|
|
|
217 state = sw_http_09;
|
|
|
218 break;
|
|
|
219 case '.':
|
|
2
|
220 r->complex_uri = 1;
|
|
|
221 state = sw_uri;
|
|
|
222 break;
|
|
0
|
223 case '%':
|
|
2
|
224 r->quoted_uri = 1;
|
|
0
|
225 state = sw_uri;
|
|
|
226 break;
|
|
10
|
227 #if (NGX_WIN32)
|
|
|
228 case '\\':
|
|
|
229 r->complex_uri = 1;
|
|
|
230 break;
|
|
|
231 #endif
|
|
0
|
232 case '/':
|
|
|
233 r->complex_uri = 1;
|
|
|
234 break;
|
|
|
235 case '?':
|
|
|
236 r->args_start = p;
|
|
|
237 state = sw_uri;
|
|
|
238 break;
|
|
|
239 default:
|
|
|
240 state = sw_check_uri;
|
|
|
241 break;
|
|
|
242 }
|
|
|
243 break;
|
|
|
244
|
|
10
|
245 /* check "/", "%" and "\" (Win32) in URI */
|
|
0
|
246 case sw_check_uri:
|
|
|
247 switch (ch) {
|
|
|
248 case CR:
|
|
|
249 r->uri_end = p - 1;
|
|
|
250 r->http_minor = 9;
|
|
|
251 state = sw_almost_done;
|
|
|
252 break;
|
|
|
253 case LF:
|
|
|
254 r->uri_end = p - 1;
|
|
|
255 r->http_minor = 9;
|
|
|
256 state = sw_done;
|
|
|
257 break;
|
|
|
258 case ' ':
|
|
|
259 r->uri_end = p - 1;
|
|
|
260 state = sw_http_09;
|
|
|
261 break;
|
|
|
262 case '.':
|
|
|
263 r->uri_ext = p;
|
|
|
264 break;
|
|
10
|
265 #if (NGX_WIN32)
|
|
|
266 case '\\':
|
|
|
267 r->complex_uri = 1;
|
|
|
268 state = sw_after_slash_in_uri;
|
|
|
269 break;
|
|
|
270 #endif
|
|
0
|
271 case '/':
|
|
|
272 r->uri_ext = NULL;
|
|
|
273 state = sw_after_slash_in_uri;
|
|
|
274 break;
|
|
|
275 case '%':
|
|
2
|
276 r->quoted_uri = 1;
|
|
0
|
277 state = sw_uri;
|
|
|
278 break;
|
|
|
279 case '?':
|
|
|
280 r->args_start = p;
|
|
|
281 state = sw_uri;
|
|
|
282 break;
|
|
|
283 }
|
|
|
284 break;
|
|
|
285
|
|
|
286 /* URI */
|
|
|
287 case sw_uri:
|
|
|
288 switch (ch) {
|
|
|
289 case CR:
|
|
|
290 r->uri_end = p - 1;
|
|
|
291 r->http_minor = 9;
|
|
|
292 state = sw_almost_done;
|
|
|
293 break;
|
|
|
294 case LF:
|
|
|
295 r->uri_end = p - 1;
|
|
|
296 r->http_minor = 9;
|
|
|
297 state = sw_done;
|
|
|
298 break;
|
|
|
299 case ' ':
|
|
|
300 r->uri_end = p - 1;
|
|
|
301 state = sw_http_09;
|
|
|
302 break;
|
|
|
303 }
|
|
|
304 break;
|
|
|
305
|
|
|
306 /* space+ after URI */
|
|
|
307 case sw_http_09:
|
|
|
308 switch (ch) {
|
|
|
309 case ' ':
|
|
|
310 break;
|
|
|
311 case CR:
|
|
|
312 r->http_minor = 9;
|
|
|
313 state = sw_almost_done;
|
|
|
314 break;
|
|
|
315 case LF:
|
|
|
316 r->http_minor = 9;
|
|
|
317 state = sw_done;
|
|
|
318 break;
|
|
|
319 case 'H':
|
|
|
320 state = sw_http_H;
|
|
|
321 break;
|
|
|
322 default:
|
|
|
323 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
324 }
|
|
|
325 break;
|
|
|
326
|
|
|
327 case sw_http_H:
|
|
|
328 switch (ch) {
|
|
|
329 case 'T':
|
|
|
330 state = sw_http_HT;
|
|
|
331 break;
|
|
|
332 default:
|
|
|
333 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
334 }
|
|
|
335 break;
|
|
|
336
|
|
|
337 case sw_http_HT:
|
|
|
338 switch (ch) {
|
|
|
339 case 'T':
|
|
|
340 state = sw_http_HTT;
|
|
|
341 break;
|
|
|
342 default:
|
|
|
343 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
344 }
|
|
|
345 break;
|
|
|
346
|
|
|
347 case sw_http_HTT:
|
|
|
348 switch (ch) {
|
|
|
349 case 'P':
|
|
|
350 state = sw_http_HTTP;
|
|
|
351 break;
|
|
|
352 default:
|
|
|
353 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
354 }
|
|
|
355 break;
|
|
|
356
|
|
|
357 case sw_http_HTTP:
|
|
|
358 switch (ch) {
|
|
|
359 case '/':
|
|
|
360 state = sw_first_major_digit;
|
|
|
361 break;
|
|
|
362 default:
|
|
|
363 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
364 }
|
|
|
365 break;
|
|
|
366
|
|
|
367 /* first digit of major HTTP version */
|
|
|
368 case sw_first_major_digit:
|
|
|
369 if (ch < '1' || ch > '9') {
|
|
|
370 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
371 }
|
|
|
372
|
|
|
373 r->http_major = ch - '0';
|
|
|
374 state = sw_major_digit;
|
|
|
375 break;
|
|
|
376
|
|
|
377 /* major HTTP version or dot */
|
|
|
378 case sw_major_digit:
|
|
|
379 if (ch == '.') {
|
|
|
380 state = sw_first_minor_digit;
|
|
|
381 break;
|
|
|
382 }
|
|
|
383
|
|
|
384 if (ch < '0' || ch > '9') {
|
|
|
385 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
386 }
|
|
|
387
|
|
|
388 r->http_major = r->http_major * 10 + ch - '0';
|
|
|
389 break;
|
|
|
390
|
|
|
391 /* first digit of minor HTTP version */
|
|
|
392 case sw_first_minor_digit:
|
|
|
393 if (ch < '0' || ch > '9') {
|
|
|
394 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
395 }
|
|
|
396
|
|
|
397 r->http_minor = ch - '0';
|
|
|
398 state = sw_minor_digit;
|
|
|
399 break;
|
|
|
400
|
|
|
401 /* minor HTTP version or end of request line */
|
|
|
402 case sw_minor_digit:
|
|
|
403 if (ch == CR) {
|
|
|
404 state = sw_almost_done;
|
|
|
405 break;
|
|
|
406 }
|
|
|
407
|
|
|
408 if (ch == LF) {
|
|
|
409 state = sw_done;
|
|
|
410 break;
|
|
|
411 }
|
|
|
412
|
|
|
413 if (ch < '0' || ch > '9') {
|
|
|
414 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
415 }
|
|
|
416
|
|
|
417 r->http_minor = r->http_minor * 10 + ch - '0';
|
|
|
418 break;
|
|
|
419
|
|
|
420 /* end of request line */
|
|
|
421 case sw_almost_done:
|
|
|
422 r->request_end = p - 2;
|
|
|
423 switch (ch) {
|
|
|
424 case LF:
|
|
|
425 state = sw_done;
|
|
|
426 break;
|
|
|
427 default:
|
|
|
428 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
429 }
|
|
|
430 break;
|
|
|
431
|
|
|
432 /* suppress warning */
|
|
|
433 case sw_done:
|
|
|
434 break;
|
|
|
435 }
|
|
|
436 }
|
|
|
437
|
|
|
438 b->pos = p;
|
|
|
439
|
|
|
440 if (state == sw_done) {
|
|
|
441 if (r->request_end == NULL) {
|
|
|
442 r->request_end = p - 1;
|
|
|
443 }
|
|
|
444
|
|
|
445 r->http_version = r->http_major * 1000 + r->http_minor;
|
|
|
446 r->state = sw_start;
|
|
|
447
|
|
|
448 if (r->http_version == 9 && r->method != NGX_HTTP_GET) {
|
|
|
449 return NGX_HTTP_PARSE_INVALID_09_METHOD;
|
|
|
450 }
|
|
|
451
|
|
|
452 return NGX_OK;
|
|
|
453
|
|
|
454 } else {
|
|
|
455 r->state = state;
|
|
|
456 return NGX_AGAIN;
|
|
|
457 }
|
|
|
458 }
|
|
|
459
|
|
|
460
|
|
|
461 ngx_int_t ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b)
|
|
|
462 {
|
|
|
463 u_char c, ch, *p;
|
|
|
464 enum {
|
|
|
465 sw_start = 0,
|
|
|
466 sw_name,
|
|
|
467 sw_space_before_value,
|
|
|
468 sw_value,
|
|
|
469 sw_space_after_value,
|
|
|
470 sw_almost_done,
|
|
|
471 sw_header_almost_done,
|
|
|
472 sw_ignore_line,
|
|
|
473 sw_done,
|
|
|
474 sw_header_done
|
|
|
475 } state;
|
|
|
476
|
|
|
477 state = r->state;
|
|
|
478 p = b->pos;
|
|
|
479
|
|
|
480 while (p < b->last && state < sw_done) {
|
|
|
481 ch = *p++;
|
|
|
482
|
|
|
483 switch (state) {
|
|
|
484
|
|
|
485 /* first char */
|
|
|
486 case sw_start:
|
|
|
487 switch (ch) {
|
|
|
488 case CR:
|
|
|
489 r->header_end = p - 1;
|
|
|
490 state = sw_header_almost_done;
|
|
|
491 break;
|
|
|
492 case LF:
|
|
|
493 r->header_end = p - 1;
|
|
|
494 state = sw_header_done;
|
|
|
495 break;
|
|
|
496 default:
|
|
|
497 state = sw_name;
|
|
|
498 r->header_name_start = p - 1;
|
|
|
499
|
|
|
500 c = (u_char) (ch | 0x20);
|
|
|
501 if (c >= 'a' && c <= 'z') {
|
|
|
502 break;
|
|
|
503 }
|
|
|
504
|
|
|
505 if (ch == '-' || ch == '_' || ch == '~' || ch == '.') {
|
|
|
506 break;
|
|
|
507 }
|
|
|
508
|
|
|
509 if (ch >= '0' && ch <= '9') {
|
|
|
510 break;
|
|
|
511 }
|
|
|
512
|
|
|
513 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
514
|
|
|
515 }
|
|
|
516 break;
|
|
|
517
|
|
|
518 /* header name */
|
|
|
519 case sw_name:
|
|
|
520 c = (u_char) (ch | 0x20);
|
|
|
521 if (c >= 'a' && c <= 'z') {
|
|
|
522 break;
|
|
|
523 }
|
|
|
524
|
|
|
525 if (ch == ':') {
|
|
|
526 r->header_name_end = p - 1;
|
|
|
527 state = sw_space_before_value;
|
|
|
528 break;
|
|
|
529 }
|
|
|
530
|
|
|
531 if (ch == '-' || ch == '_' || ch == '~' || ch == '.') {
|
|
|
532 break;
|
|
|
533 }
|
|
|
534
|
|
|
535 if (ch >= '0' && ch <= '9') {
|
|
|
536 break;
|
|
|
537 }
|
|
|
538
|
|
2
|
539 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
|
0
|
540 if (ch == '/'
|
|
|
541 && r->proxy
|
|
|
542 && p - r->header_start == 5
|
|
|
543 && ngx_strncmp(r->header_start, "HTTP", 4) == 0)
|
|
|
544 {
|
|
|
545 state = sw_ignore_line;
|
|
|
546 break;
|
|
|
547 }
|
|
|
548
|
|
|
549 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
550
|
|
|
551 /* space* before header value */
|
|
|
552 case sw_space_before_value:
|
|
|
553 switch (ch) {
|
|
|
554 case ' ':
|
|
|
555 break;
|
|
|
556 case CR:
|
|
|
557 r->header_start = r->header_end = p - 1;
|
|
|
558 state = sw_almost_done;
|
|
|
559 break;
|
|
|
560 case LF:
|
|
|
561 r->header_start = r->header_end = p - 1;
|
|
|
562 state = sw_done;
|
|
|
563 break;
|
|
|
564 default:
|
|
|
565 r->header_start = p - 1;
|
|
|
566 state = sw_value;
|
|
|
567 break;
|
|
|
568 }
|
|
|
569 break;
|
|
|
570
|
|
|
571 /* header value */
|
|
|
572 case sw_value:
|
|
|
573 switch (ch) {
|
|
|
574 case ' ':
|
|
|
575 r->header_end = p - 1;
|
|
|
576 state = sw_space_after_value;
|
|
|
577 break;
|
|
|
578 case CR:
|
|
|
579 r->header_end = p - 1;
|
|
|
580 state = sw_almost_done;
|
|
|
581 break;
|
|
|
582 case LF:
|
|
|
583 r->header_end = p - 1;
|
|
|
584 state = sw_done;
|
|
|
585 break;
|
|
|
586 }
|
|
|
587 break;
|
|
|
588
|
|
|
589 /* space* before end of header line */
|
|
|
590 case sw_space_after_value:
|
|
|
591 switch (ch) {
|
|
|
592 case ' ':
|
|
|
593 break;
|
|
|
594 case CR:
|
|
|
595 state = sw_almost_done;
|
|
|
596 break;
|
|
|
597 case LF:
|
|
|
598 state = sw_done;
|
|
|
599 break;
|
|
|
600 default:
|
|
|
601 state = sw_value;
|
|
|
602 break;
|
|
|
603 }
|
|
|
604 break;
|
|
|
605
|
|
|
606 /* ignore header line */
|
|
|
607 case sw_ignore_line:
|
|
|
608 switch (ch) {
|
|
|
609 case LF:
|
|
|
610 state = sw_start;
|
|
|
611 break;
|
|
|
612 default:
|
|
|
613 break;
|
|
|
614 }
|
|
|
615 break;
|
|
|
616
|
|
|
617 /* end of header line */
|
|
|
618 case sw_almost_done:
|
|
|
619 switch (ch) {
|
|
|
620 case LF:
|
|
|
621 state = sw_done;
|
|
|
622 break;
|
|
|
623 default:
|
|
|
624 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
625 }
|
|
|
626 break;
|
|
|
627
|
|
|
628 /* end of header */
|
|
|
629 case sw_header_almost_done:
|
|
|
630 switch (ch) {
|
|
|
631 case LF:
|
|
|
632 state = sw_header_done;
|
|
|
633 break;
|
|
|
634 default:
|
|
|
635 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
636 }
|
|
|
637 break;
|
|
|
638
|
|
|
639 /* suppress warning */
|
|
|
640 case sw_done:
|
|
|
641 case sw_header_done:
|
|
|
642 break;
|
|
|
643 }
|
|
|
644 }
|
|
|
645
|
|
|
646 b->pos = p;
|
|
|
647
|
|
|
648 if (state == sw_done) {
|
|
|
649 r->state = sw_start;
|
|
|
650 return NGX_OK;
|
|
|
651
|
|
|
652 } else if (state == sw_header_done) {
|
|
|
653 r->state = sw_start;
|
|
|
654 return NGX_HTTP_PARSE_HEADER_DONE;
|
|
|
655
|
|
|
656 } else {
|
|
|
657 r->state = state;
|
|
|
658 return NGX_AGAIN;
|
|
|
659 }
|
|
|
660 }
|
|
|
661
|
|
|
662
|
|
|
663 ngx_int_t ngx_http_parse_complex_uri(ngx_http_request_t *r)
|
|
|
664 {
|
|
|
665 u_char c, ch, decoded, *p, *u;
|
|
|
666 enum {
|
|
|
667 sw_usual = 0,
|
|
|
668 sw_slash,
|
|
|
669 sw_dot,
|
|
|
670 sw_dot_dot,
|
|
10
|
671 #if (NGX_WIN32)
|
|
0
|
672 sw_dot_dot_dot,
|
|
|
673 #endif
|
|
|
674 sw_quoted,
|
|
|
675 sw_quoted_second
|
|
|
676 } state, quoted_state;
|
|
|
677
|
|
|
678 decoded = '\0';
|
|
|
679 quoted_state = sw_usual;
|
|
|
680
|
|
|
681 state = sw_usual;
|
|
|
682 p = r->uri_start;
|
|
|
683 u = r->uri.data;
|
|
|
684 r->uri_ext = NULL;
|
|
10
|
685 r->args_start = NULL;
|
|
0
|
686
|
|
|
687 ch = *p++;
|
|
|
688
|
|
20
|
689 while (p <= r->uri_end && r->args_start == NULL) {
|
|
10
|
690
|
|
|
691 /*
|
|
|
692 * we use "ch = *p++" inside the cycle but this operation is safe
|
|
|
693 * because after the URI there is always at least one charcter:
|
|
|
694 * the line feed
|
|
|
695 */
|
|
0
|
696
|
|
|
697 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
10
|
698 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
|
0
|
699
|
|
|
700 switch (state) {
|
|
|
701 case sw_usual:
|
|
|
702 switch(ch) {
|
|
10
|
703 #if (NGX_WIN32)
|
|
|
704 case '\\':
|
|
|
705 r->uri_ext = NULL;
|
|
|
706
|
|
|
707 if (p == r->uri_start + r->uri.len) {
|
|
|
708
|
|
|
709 /*
|
|
|
710 * we omit the last "\" to cause redirect because
|
|
|
711 * the browsers do not treat "\" as "/" in relative URL path
|
|
|
712 */
|
|
|
713
|
|
|
714 break;
|
|
|
715 }
|
|
|
716
|
|
|
717 state = sw_slash;
|
|
|
718 *u++ = '/';
|
|
|
719 break;
|
|
|
720 #endif
|
|
0
|
721 case '/':
|
|
|
722 r->uri_ext = NULL;
|
|
|
723 state = sw_slash;
|
|
|
724 *u++ = ch;
|
|
|
725 break;
|
|
|
726 case '%':
|
|
|
727 quoted_state = state;
|
|
|
728 state = sw_quoted;
|
|
|
729 break;
|
|
10
|
730 case '?':
|
|
|
731 r->args_start = p;
|
|
|
732 break;
|
|
0
|
733 case '.':
|
|
|
734 r->uri_ext = u + 1;
|
|
|
735 default:
|
|
|
736 *u++ = ch;
|
|
|
737 break;
|
|
|
738 }
|
|
|
739 ch = *p++;
|
|
|
740 break;
|
|
|
741
|
|
|
742 case sw_slash:
|
|
|
743 switch(ch) {
|
|
10
|
744 #if (NGX_WIN32)
|
|
|
745 case '\\':
|
|
|
746 break;
|
|
|
747 #endif
|
|
0
|
748 case '/':
|
|
|
749 break;
|
|
|
750 case '.':
|
|
|
751 state = sw_dot;
|
|
|
752 *u++ = ch;
|
|
|
753 break;
|
|
|
754 case '%':
|
|
|
755 quoted_state = state;
|
|
|
756 state = sw_quoted;
|
|
|
757 break;
|
|
|
758 default:
|
|
|
759 state = sw_usual;
|
|
|
760 *u++ = ch;
|
|
|
761 break;
|
|
|
762 }
|
|
|
763 ch = *p++;
|
|
|
764 break;
|
|
|
765
|
|
|
766 case sw_dot:
|
|
|
767 switch(ch) {
|
|
10
|
768 #if (NGX_WIN32)
|
|
|
769 case '\\':
|
|
|
770 /* fall through */
|
|
|
771 #endif
|
|
0
|
772 case '/':
|
|
|
773 state = sw_slash;
|
|
|
774 u--;
|
|
|
775 break;
|
|
|
776 case '.':
|
|
|
777 state = sw_dot_dot;
|
|
|
778 *u++ = ch;
|
|
|
779 break;
|
|
|
780 case '%':
|
|
|
781 quoted_state = state;
|
|
|
782 state = sw_quoted;
|
|
|
783 break;
|
|
|
784 default:
|
|
|
785 state = sw_usual;
|
|
|
786 *u++ = ch;
|
|
|
787 break;
|
|
|
788 }
|
|
|
789 ch = *p++;
|
|
|
790 break;
|
|
|
791
|
|
|
792 case sw_dot_dot:
|
|
|
793 switch(ch) {
|
|
10
|
794 #if (NGX_WIN32)
|
|
|
795 case '\\':
|
|
|
796 /* fall through */
|
|
|
797 #endif
|
|
0
|
798 case '/':
|
|
|
799 state = sw_slash;
|
|
|
800 u -= 4;
|
|
|
801 if (u < r->uri.data) {
|
|
|
802 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
803 }
|
|
|
804 while (*(u - 1) != '/') {
|
|
|
805 u--;
|
|
|
806 }
|
|
|
807 break;
|
|
|
808 case '%':
|
|
|
809 quoted_state = state;
|
|
|
810 state = sw_quoted;
|
|
|
811 break;
|
|
10
|
812 #if (NGX_WIN32)
|
|
0
|
813 case '.':
|
|
|
814 state = sw_dot_dot_dot;
|
|
|
815 *u++ = ch;
|
|
|
816 break;
|
|
|
817 #endif
|
|
|
818 default:
|
|
|
819 state = sw_usual;
|
|
|
820 *u++ = ch;
|
|
|
821 break;
|
|
|
822 }
|
|
|
823 ch = *p++;
|
|
|
824 break;
|
|
|
825
|
|
10
|
826 #if (NGX_WIN32)
|
|
0
|
827 case sw_dot_dot_dot:
|
|
|
828 switch(ch) {
|
|
10
|
829 case '\\':
|
|
0
|
830 case '/':
|
|
|
831 state = sw_slash;
|
|
|
832 u -= 5;
|
|
|
833 if (u < r->uri.data) {
|
|
|
834 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
835 }
|
|
|
836 while (*u != '/') {
|
|
|
837 u--;
|
|
|
838 }
|
|
|
839 if (u < r->uri.data) {
|
|
|
840 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
841 }
|
|
|
842 while (*(u - 1) != '/') {
|
|
|
843 u--;
|
|
|
844 }
|
|
|
845 break;
|
|
|
846 case '%':
|
|
|
847 quoted_state = state;
|
|
|
848 state = sw_quoted;
|
|
|
849 break;
|
|
|
850 default:
|
|
|
851 state = sw_usual;
|
|
|
852 *u++ = ch;
|
|
|
853 break;
|
|
|
854 }
|
|
|
855 ch = *p++;
|
|
|
856 break;
|
|
|
857 #endif
|
|
|
858
|
|
|
859 case sw_quoted:
|
|
|
860 if (ch >= '0' && ch <= '9') {
|
|
|
861 decoded = (u_char) (ch - '0');
|
|
|
862 state = sw_quoted_second;
|
|
|
863 ch = *p++;
|
|
|
864 break;
|
|
|
865 }
|
|
|
866
|
|
|
867 c = (u_char) (ch | 0x20);
|
|
|
868 if (c >= 'a' && c <= 'f') {
|
|
|
869 decoded = (u_char) (c - 'a' + 10);
|
|
|
870 state = sw_quoted_second;
|
|
|
871 ch = *p++;
|
|
|
872 break;
|
|
|
873 }
|
|
|
874
|
|
|
875 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
876
|
|
|
877 case sw_quoted_second:
|
|
|
878 if (ch >= '0' && ch <= '9') {
|
|
|
879 ch = (u_char) ((decoded << 4) + ch - '0');
|
|
|
880 if (ch == '%') {
|
|
|
881 state = sw_usual;
|
|
|
882 *u++ = ch;
|
|
|
883 ch = *p++;
|
|
|
884 break;
|
|
|
885 }
|
|
|
886 state = quoted_state;
|
|
|
887 break;
|
|
|
888 }
|
|
|
889
|
|
|
890 c = (u_char) (ch | 0x20);
|
|
|
891 if (c >= 'a' && c <= 'f') {
|
|
|
892 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
|
|
893 if (ch == '%') {
|
|
|
894 state = sw_usual;
|
|
|
895 *u++ = ch;
|
|
|
896 ch = *p++;
|
|
|
897 break;
|
|
|
898 }
|
|
|
899 state = quoted_state;
|
|
|
900 break;
|
|
|
901 }
|
|
|
902
|
|
|
903 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
904 }
|
|
|
905 }
|
|
|
906
|
|
|
907 r->uri.len = u - r->uri.data;
|
|
|
908 r->uri.data[r->uri.len] = '\0';
|
|
|
909
|
|
|
910 if (r->uri_ext) {
|
|
|
911 r->exten.len = u - r->uri_ext;
|
|
10
|
912 r->exten.data = r->uri_ext;
|
|
0
|
913 }
|
|
|
914
|
|
|
915 r->uri_ext = NULL;
|
|
|
916
|
|
|
917 return NGX_OK;
|
|
|
918 }
|
