本文详细介绍了Nginx配置文件的解析过程，包括如何读取配置文件、处理配置指令及参数，并展示了核心函数ngx_conf_parse的实现细节。
1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10
11 #define NGX_CONF_BUFFER 4096
12
13 static ngx_int_t ngx_conf_handler(ngx_conf_t *cf, ngx_int_t last);
14 static ngx_int_t ngx_conf_read_token(ngx_conf_t *cf);
15 static void ngx_conf_flush_files(ngx_cycle_t *cycle);
16
17
18 static ngx_command_t ngx_conf_commands[] = {
19
20 { ngx_string("include"),
21 NGX_ANY_CONF|NGX_CONF_TAKE1,
22 ngx_conf_include,
23 0,
24 0,
25 NULL },
26
27 ngx_null_command
28 };
29
30
31 ngx_module_t ngx_conf_module = {
32 NGX_MODULE_V1,
33 NULL, /* module context */
34 ngx_conf_commands, /* module directives */
35 NGX_CONF_MODULE, /* module type */
36 NULL, /* init master */
37 NULL, /* init module */
38 NULL, /* init process */
39 NULL, /* init thread */
40 NULL, /* exit thread */
41 ngx_conf_flush_files, /* exit process */
42 NULL, /* exit master */
43 NGX_MODULE_V1_PADDING
44 };
45
46
47 /* The eight fixed arguments */
48
49 static ngx_uint_t argument_number[] = {
50 NGX_CONF_NOARGS,
51 NGX_CONF_TAKE1,
52 NGX_CONF_TAKE2,
53 NGX_CONF_TAKE3,
54 NGX_CONF_TAKE4,
55 NGX_CONF_TAKE5,
56 NGX_CONF_TAKE6,
57 NGX_CONF_TAKE7
58 };
59
60
61 char *
62 ngx_conf_param(ngx_conf_t *cf)
63 {
64 char *rv;
65 ngx_str_t *param;
66 ngx_buf_t b;
67 ngx_conf_file_t conf_file;
68
69 param = &cf->cycle->conf_param;
70
71 if (param->len == 0) {
72 return NGX_CONF_OK;
73 }
74 /* 伪造conf_file */
75 ngx_memzero(&conf_file, sizeof(ngx_conf_file_t));
76 /* 伪造ngx_buf */
77 ngx_memzero(&b, sizeof(ngx_buf_t));
78
79 b.start = param->data;
80 b.pos = param->data;
81 b.last = param->data + param->len;
82 b.end = b.last;
83 b.temporary = 1;
84
85 conf_file.file.fd = NGX_INVALID_FILE; /* ngx_conf_parse通过filename == NULL && fd == NGX_INVALID_FILE来识别类型parse_param */
86 conf_file.file.name.data = NULL;
87 conf_file.line = 0;
88
89 cf->conf_file = &conf_file;
90 cf->conf_file->buffer = &b;
91
92 rv = ngx_conf_parse(cf, NULL); /* 解析param */
93
94 cf->conf_file = NULL; /* 清空conf_file */
95
96 return rv;
97 }
98
99
100 char *
101 ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename)
102 {
103 char *rv;
104 ngx_fd_t fd;
105 ngx_int_t rc;
106 ngx_buf_t buf;
107 ngx_conf_file_t *prev, conf_file;
108 enum {
109 parse_file = 0,
110 parse_block,
111 parse_param
112 } type;
113
114 #if (NGX_SUPPRESS_WARN)
115 fd = NGX_INVALID_FILE;
116 prev = NULL;
117 #endif
118
119 if (filename) {
120
121 /* open configuration file */
122
123 fd = ngx_open_file(filename->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
124 if (fd == NGX_INVALID_FILE) {
125 ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
126 ngx_open_file_n " \"%s\" failed",
127 filename->data);
128 return NGX_CONF_ERROR;
129 }
130
131 prev = cf->conf_file;
132
133 cf->conf_file = &conf_file;
134
135 if (ngx_fd_info(fd, &cf->conf_file->file.info) == NGX_FILE_ERROR) {
136 ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
137 ngx_fd_info_n " \"%s\" failed", filename->data);
138 }
139
140 cf->conf_file->buffer = &buf;
141
142 buf.start = ngx_alloc(NGX_CONF_BUFFER, cf->log);
143 if (buf.start == NULL) {
144 goto failed;
145 }
146
147 buf.pos = buf.start;
148 buf.last = buf.start;
149 buf.end = buf.last + NGX_CONF_BUFFER;
150 buf.temporary = 1;
151
152 cf->conf_file->file.fd = fd;
153 cf->conf_file->file.name.len = filename->len;
154 cf->conf_file->file.name.data = filename->data;
155 cf->conf_file->file.offset = 0;
156 cf->conf_file->file.log = cf->log;
157 cf->conf_file->line = 1;
158
159 type = parse_file;
160
161 } else if (cf->conf_file->file.fd != NGX_INVALID_FILE) {
162
163 type = parse_block;
164
165 } else {
166 type = parse_param;
167 }
168
169
170 for ( ;; ) {
171 rc = ngx_conf_read_token(cf);
172
173 /*
174 * ngx_conf_read_token() may return
175 *
176 * NGX_ERROR there is error
177 * NGX_OK the token terminated by ";" was found
178 * NGX_CONF_BLOCK_START the token terminated by "{" was found
179 * NGX_CONF_BLOCK_DONE the "}" was found
180 * NGX_CONF_FILE_DONE the configuration file is done
181 */
182
183 if (rc == NGX_ERROR) {
184 goto done;
185 }
186
187 if (rc == NGX_CONF_BLOCK_DONE) {
188
189 if (type != parse_block) {
190 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"}\"");
191 goto failed;
192 }
193
194 goto done;
195 }
196
197 if (rc == NGX_CONF_FILE_DONE) {
198
199 if (type == parse_block) {
200 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
201 "unexpected end of file, expecting \"}\"");
202 goto failed;
203 }
204
205 goto done;
206 }
207
208 if (rc == NGX_CONF_BLOCK_START) {
209
210 if (type == parse_param) {
211 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
212 "block directives are not supported "
213 "in -g option");
214 goto failed;
215 }
216 }
217
218 /* rc == NGX_OK || rc == NGX_CONF_BLOCK_START */
219
220 if (cf->handler) {
221
222 /*
223 * the custom handler, i.e., that is used in the http's
224 * "types { ... }" directive
225 */
226
227 if (rc == NGX_CONF_BLOCK_START) {
228 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"{\"");
229 goto failed;
230 }
231
232 rv = (*cf->handler)(cf, NULL, cf->handler_conf);
233 if (rv == NGX_CONF_OK) {
234 continue;
235 }
236
237 if (rv == NGX_CONF_ERROR) {
238 goto failed;
239 }
240
241 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, rv);
242
243 goto failed;
244 }
245
246
247 rc = ngx_conf_handler(cf, rc);
248
249 if (rc == NGX_ERROR) {
250 goto failed;
251 }
252 }
253
254 failed:
255
256 rc = NGX_ERROR;
257
258 done:
259
260 if (filename) {
261 if (cf->conf_file->buffer->start) {
262 ngx_free(cf->conf_file->buffer->start);
263 }
264
265 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
266 ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
267 ngx_close_file_n " %s failed",
268 filename->data);
269 return NGX_CONF_ERROR;
270 }
271
272 cf->conf_file = prev;
273 }
274
275 if (rc == NGX_ERROR) {
276 return NGX_CONF_ERROR;
277 }
278
279 return NGX_CONF_OK;
280 }
281
282
283 static ngx_int_t
284 ngx_conf_handler(ngx_conf_t *cf, ngx_int_t last)
285 {
286 char *rv;
287 void *conf, **confp;
288 ngx_uint_t i, found;
289 ngx_str_t *name;
290 ngx_command_t *cmd;
291
292 name = cf->args->elts;
293
294 found = 0;
295
296 for (i = 0; ngx_modules[i]; i++) {
297
298 cmd = ngx_modules[i]->commands;
299 if (cmd == NULL) {
300 continue;
301 }
302
303 for ( /* void */ ; cmd->name.len; cmd++) {
304
305 if (name->len != cmd->name.len) {
306 continue;
307 }
308
309 if (ngx_strcmp(name->data, cmd->name.data) != 0) {
310 continue;
311 }
312
313 found = 1;
314
315 if (ngx_modules[i]->type != NGX_CONF_MODULE
316 && ngx_modules[i]->type != cf->module_type)
317 {
318 continue;
319 }
320
321 /* is the directive's location right ? */
322
323 if (!(cmd->type & cf->cmd_type)) {
324 continue;
325 }
326
327 if (!(cmd->type & NGX_CONF_BLOCK) && last != NGX_OK) {
328 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
329 "directive \"%s\" is not terminated by \";\"",
330 name->data);
331 return NGX_ERROR;
332 }
333
334 if ((cmd->type & NGX_CONF_BLOCK) && last != NGX_CONF_BLOCK_START) {
335 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
336 "directive \"%s\" has no opening \"{\"",
337 name->data);
338 return NGX_ERROR;
339 }
340
341 /* is the directive's argument count right ? */
342
343 if (!(cmd->type & NGX_CONF_ANY)) {
344
345 if (cmd->type & NGX_CONF_FLAG) {
346
347 if (cf->args->nelts != 2) {
348 goto invalid;
349 }
350
351 } else if (cmd->type & NGX_CONF_1MORE) {
352
353 if (cf->args->nelts < 2) {
354 goto invalid;
355 }
356
357 } else if (cmd->type & NGX_CONF_2MORE) {
358
359 if (cf->args->nelts < 3) {
360 goto invalid;
361 }
362
363 } else if (cf->args->nelts > NGX_CONF_MAX_ARGS) {
364
365 goto invalid;
366
367 } else if (!(cmd->type & argument_number[cf->args->nelts - 1]))
368 {
369 goto invalid;
370 }
371 }
372
373 /* set up the directive's configuration context */
374
375 conf = NULL;
376
377 if (cmd->type & NGX_DIRECT_CONF) {
378 conf = ((void **) cf->ctx)[ngx_modules[i]->index];
379
380 } else if (cmd->type & NGX_MAIN_CONF) {
381 conf = &(((void **) cf->ctx)[ngx_modules[i]->index]);
382
383 } else if (cf->ctx) {
384 confp = *(void **) ((char *) cf->ctx + cmd->conf);
385
386 if (confp) {
387 conf = confp[ngx_modules[i]->ctx_index];
388 }
389 }
390
391 rv = cmd->set(cf, cmd, conf);
392
393 if (rv == NGX_CONF_OK) {
394 return NGX_OK;
395 }
396
397 if (rv == NGX_CONF_ERROR) {
398 return NGX_ERROR;
399 }
400
401 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
402 "\"%s\" directive %s", name->data, rv);
403
404 return NGX_ERROR;
405 }
406 }
407
408 if (found) {
409 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
410 "\"%s\" directive is not allowed here", name->data);
411
412 return NGX_ERROR;
413 }
414
415 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
416 "unknown directive \"%s\"", name->data);
417
418 return NGX_ERROR;
419
420 invalid:
421
422 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
423 "invalid number of arguments in \"%s\" directive",
424 name->data);
425
426 return NGX_ERROR;
427 }
428
429
430 static ngx_int_t
431 ngx_conf_read_token(ngx_conf_t *cf)
432 {
433 u_char *start, ch, *src, *dst;
434 off_t file_size;
435 size_t len;
436 ssize_t n, size;
437 ngx_uint_t found, need_space, last_space, sharp_comment, variable;
438 ngx_uint_t quoted, s_quoted, d_quoted, start_line;
439 ngx_str_t *word;
440 ngx_buf_t *b;
441
442 found = 0;
443 need_space = 0;
444 last_space = 1;
445 sharp_comment = 0;
446 variable = 0;
447 quoted = 0;
448 s_quoted = 0;
449 d_quoted = 0;
450
451 cf->args->nelts = 0;
452 b = cf->conf_file->buffer;
453 start = b->pos;
454 start_line = cf->conf_file->line;
455
456 file_size = ngx_file_size(&cf->conf_file->file.info);
457
458 for ( ;; ) {
459
460 if (b->pos >= b->last) {
461
462 if (cf->conf_file->file.offset >= file_size) {
463
464 if (cf->args->nelts > 0 || !last_space) {
465
466 if (cf->conf_file->file.fd == NGX_INVALID_FILE) {
467 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
468 "unexpected end of parameter, "
469 "expecting \";\"");
470 return NGX_ERROR;
471 }
472
473 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
474 "unexpected end of file, "
475 "expecting \";\" or \"}\"");
476 return NGX_ERROR;
477 }
478
479 return NGX_CONF_FILE_DONE;
480 }
481
482 len = b->pos - start;
483
484 if (len == NGX_CONF_BUFFER) {
485 cf->conf_file->line = start_line;
486
487 if (d_quoted) {
488 ch = '"';
489
490 } else if (s_quoted) {
491 ch = '\'';
492
493 } else {
494 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
495 "too long parameter \"%*s...\" started",
496 10, start);
497 return NGX_ERROR;
498 }
499
500 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
501 "too long parameter, probably "
502 "missing terminating \"%c\" character", ch);
503 return NGX_ERROR;
504 }
505
506 if (len) {
507 ngx_memmove(b->start, start, len);
508 }
509
510 size = (ssize_t) (file_size - cf->conf_file->file.offset);
511
512 if (size > b->end - (b->start + len)) {
513 size = b->end - (b->start + len);
514 }
515
516 n = ngx_read_file(&cf->conf_file->file, b->start + len, size,
517 cf->conf_file->file.offset);
518
519 if (n == NGX_ERROR) {
520 return NGX_ERROR;
521 }
522
523 if (n != size) {
524 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
525 ngx_read_file_n " returned "
526 "only %z bytes instead of %z",
527 n, size);
528 return NGX_ERROR;
529 }
530
531 b->pos = b->start + len;
532 b->last = b->pos + n;
533 start = b->start;
534 }
535
536 ch = *b->pos++;
537
538 if (ch == LF) {
539 cf->conf_file->line++;
540
541 if (sharp_comment) {
542 sharp_comment = 0;
543 }
544 }
545
546 if (sharp_comment) {
547 continue;
548 }
549
550 if (quoted) {
551 quoted = 0;
552 continue;
553 }
554
555 if (need_space) {
556 if (ch == ' ' || ch == '\t' || ch == CR || ch == LF) {
557 last_space = 1;
558 need_space = 0;
559 continue;
560 }
561
562 if (ch == ';') {
563 return NGX_OK;
564 }
565
566 if (ch == '{') {
567 return NGX_CONF_BLOCK_START;
568 }
569
570 if (ch == ')') {
571 last_space = 1;
572 need_space = 0;
573
574 } else {
575 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
576 "unexpected \"%c\"", ch);
577 return NGX_ERROR;
578 }
579 }
580
581 if (last_space) {
582 if (ch == ' ' || ch == '\t' || ch == CR || ch == LF) {
583 continue;
584 }
585
586 start = b->pos - 1;
587 start_line = cf->conf_file->line;
588
589 switch (ch) {
590
591 case ';':
592 case '{':
593 if (cf->args->nelts == 0) {
594 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
595 "unexpected \"%c\"", ch);
596 return NGX_ERROR;
597 }
598
599 if (ch == '{') {
600 return NGX_CONF_BLOCK_START;
601 }
602
603 return NGX_OK;
604
605 case '}':
606 if (cf->args->nelts != 0) {
607 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
608 "unexpected \"}\"");
609 return NGX_ERROR;
610 }
611
612 return NGX_CONF_BLOCK_DONE;
613
614 case '#':
615 sharp_comment = 1;
616 continue;
617
618 case '\\':
619 quoted = 1;
620 last_space = 0;
621 continue;
622
623 case '"':
624 start++;
625 d_quoted = 1;
626 last_space = 0;
627 continue;
628
629 case '\'':
630 start++;
631 s_quoted = 1;
632 last_space = 0;
633 continue;
634
635 default:
636 last_space = 0;
637 }
638
639 } else {
640 if (ch == '{' && variable) {
641 continue;
642 }
643
644 variable = 0;
645
646 if (ch == '\\') {
647 quoted = 1;
648 continue;
649 }
650
651 if (ch == '$') {
652 variable = 1;
653 continue;
654 }
655
656 if (d_quoted) {
657 if (ch == '"') {
658 d_quoted = 0;
659 need_space = 1;
660 found = 1;
661 }
662
663 } else if (s_quoted) {
664 if (ch == '\'') {
665 s_quoted = 0;
666 need_space = 1;
667 found = 1;
668 }
669
670 } else if (ch == ' ' || ch == '\t' || ch == CR || ch == LF
671 || ch == ';' || ch == '{')
672 {
673 last_space = 1;
674 found = 1;
675 }
676
677 if (found) {
678 word = ngx_array_push(cf->args);
679 if (word == NULL) {
680 return NGX_ERROR;
681 }
682
683 word->data = ngx_pnalloc(cf->pool, b->pos - start + 1);
684 if (word->data == NULL) {
685 return NGX_ERROR;
686 }
687
688 for (dst = word->data, src = start, len = 0;
689 src < b->pos - 1;
690 len++)
691 {
692 if (*src == '\\') {
693 switch (src[1]) {
694 case '"':
695 case '\'':
696 case '\\':
697 src++;
698 break;
699
700 case 't':
701 *dst++ = '\t';
702 src += 2;
703 continue;
704
705 case 'r':
706 *dst++ = '\r';
707 src += 2;
708 continue;
709
710 case 'n':
711 *dst++ = '\n';
712 src += 2;
713 continue;
714 }
715
716 }
717 *dst++ = *src++;
718 }
719 *dst = '\0';
720 word->len = len;
721
722 if (ch == ';') {
723 return NGX_OK;
724 }
725
726 if (ch == '{') {
727 return NGX_CONF_BLOCK_START;
728 }
729
730 found = 0;
731 }
732 }
733 }
734 }
735
736
737 char *
738 ngx_conf_include(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
739 {
740 char *rv;
741 ngx_int_t n;
742 ngx_str_t *value, file, name;
743 ngx_glob_t gl;
744
745 value = cf->args->elts;
746 file = value[1];
747
748 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
749
750 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) {
751 return NGX_CONF_ERROR;
752 }
753
754 if (strpbrk((char *) file.data, "*?[") == NULL) {
755
756 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
757
758 return ngx_conf_parse(cf, &file);
759 }
760
761 ngx_memzero(&gl, sizeof(ngx_glob_t));
762
763 gl.pattern = file.data;
764 gl.log = cf->log;
765 gl.test = 1;
766
767 if (ngx_open_glob(&gl) != NGX_OK) {
768 ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
769 ngx_open_glob_n " \"%s\" failed", file.data);
770 return NGX_CONF_ERROR;
771 }
772
773 rv = NGX_CONF_OK;
774
775 for ( ;; ) {
776 n = ngx_read_glob(&gl, &name);
777
778 if (n != NGX_OK) {
779 break;
780 }
781
782 file.len = name.len++;
783 file.data = ngx_pstrdup(cf->pool, &name);
784
785 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
786
787 rv = ngx_conf_parse(cf, &file);
788
789 if (rv != NGX_CONF_OK) {
790 break;
791 }
792 }
793
794 ngx_close_glob(&gl);
795
796 return rv;
797 }
798
799
800 ngx_int_t
801 ngx_conf_full_name(ngx_cycle_t *cycle, ngx_str_t *name, ngx_uint_t conf_prefix)
802 {
803 ngx_str_t *prefix;
804
805 prefix = conf_prefix ? &cycle->conf_prefix : &cycle->prefix;
806
807 return ngx_get_full_name(cycle->pool, prefix, name);
808 }
809
810
811 ngx_open_file_t *
812 ngx_conf_open_file(ngx_cycle_t *cycle, ngx_str_t *name)
813 {
814 ngx_str_t full;
815 ngx_uint_t i;
816 ngx_list_part_t *part;
817 ngx_open_file_t *file;
818
819 #if (NGX_SUPPRESS_WARN)
820 ngx_str_null(&full);
821 #endif
822
823 if (name->len) {
824 full = *name;
825
826 if (ngx_conf_full_name(cycle, &full, 0) != NGX_OK) {
827 return NULL;
828 }
829
830 part = &cycle->open_files.part;
831 file = part->elts;
832
833 for (i = 0; /* void */ ; i++) {
834
835 if (i >= part->nelts) {
836 if (part->next == NULL) {
837 break;
838 }
839 part = part->next;
840 file = part->elts;
841 i = 0;
842 }
843
844 if (full.len != file[i].name.len) {
845 continue;
846 }
847
848 if (ngx_strcmp(full.data, file[i].name.data) == 0) {
849 return &file[i];
850 }
851 }
852 }
853
854 file = ngx_list_push(&cycle->open_files);
855 if (file == NULL) {
856 return NULL;
857 }
858
859 if (name->len) {
860 file->fd = NGX_INVALID_FILE;
861 file->name = full;
862
863 } else {
864 file->fd = ngx_stderr;
865 file->name = *name;
866 }
867
868 file->flush = NULL;
869 file->data = NULL;
870
871 return file;
872 }
873
874
875 static void
876 ngx_conf_flush_files(ngx_cycle_t *cycle)
877 {
878 ngx_uint_t i;
879 ngx_list_part_t *part;
880 ngx_open_file_t *file;
881
882 ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0, "flush files");
883
884 part = &cycle->open_files.part;
885 file = part->elts;
886
887 for (i = 0; /* void */ ; i++) {
888
889 if (i >= part->nelts) {
890 if (part->next == NULL) {
891 break;
892 }
893 part = part->next;
894 file = part->elts;
895 i = 0;
896 }
897
898 if (file[i].flush) {
899 file[i].flush(&file[i], cycle->log);
900 }
901 }
902 }
903
904
905 void ngx_cdecl
906 ngx_conf_log_error(ngx_uint_t level, ngx_conf_t *cf, ngx_err_t err,
907 const char *fmt, ...)
908 {
909 u_char errstr[NGX_MAX_CONF_ERRSTR], *p, *last;
910 va_list args;
911
912 last = errstr + NGX_MAX_CONF_ERRSTR;
913
914 va_start(args, fmt);
915 p = ngx_vslprintf(errstr, last, fmt, args);
916 va_end(args);
917
918 if (err) {
919 p = ngx_log_errno(p, last, err);
920 }
921
922 if (cf->conf_file == NULL) {
923 ngx_log_error(level, cf->log, 0, "%*s", p - errstr, errstr);
924 return;
925 }
926
927 if (cf->conf_file->file.fd == NGX_INVALID_FILE) {
928 ngx_log_error(level, cf->log, 0, "%*s in command line",
929 p - errstr, errstr);
930 return;
931 }
932
933 ngx_log_error(level, cf->log, 0, "%*s in %s:%ui",
934 p - errstr, errstr,
935 cf->conf_file->file.name.data, cf->conf_file->line);
936 }
937
938
939 char *
940 ngx_conf_set_flag_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
941 {
942 char *p = conf;
943
944 ngx_str_t *value;
945 ngx_flag_t *fp;
946 ngx_conf_post_t *post;
947
948 fp = (ngx_flag_t *) (p + cmd->offset);
949
950 if (*fp != NGX_CONF_UNSET) {
951 return "is duplicate";
952 }
953
954 value = cf->args->elts;
955
956 if (ngx_strcasecmp(value[1].data, (u_char *) "on") == 0) {
957 *fp = 1;
958
959 } else if (ngx_strcasecmp(value[1].data, (u_char *) "off") == 0) {
960 *fp = 0;
961
962 } else {
963 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
964 "invalid value \"%s\" in \"%s\" directive, "
965 "it must be \"on\" or \"off\"",
966 value[1].data, cmd->name.data);
967 return NGX_CONF_ERROR;
968 }
969
970 if (cmd->post) {
971 post = cmd->post;
972 return post->post_handler(cf, post, fp);
973 }
974
975 return NGX_CONF_OK;
976 }
977
978
979 char *
980 ngx_conf_set_str_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
981 {
982 char *p = conf;
983
984 ngx_str_t *field, *value;
985 ngx_conf_post_t *post;
986
987 field = (ngx_str_t *) (p + cmd->offset);
988
989 if (field->data) {
990 return "is duplicate";
991 }
992
993 value = cf->args->elts;
994
995 *field = value[1];
996
997 if (cmd->post) {
998 post = cmd->post;
999 return post->post_handler(cf, post, field);
1000 }
1001
1002 return NGX_CONF_OK;
1003 }
1004
1005
1006 char *
1007 ngx_conf_set_str_array_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1008 {
1009 char *p = conf;
1010
1011 ngx_str_t *value, *s;
1012 ngx_array_t **a;
1013 ngx_conf_post_t *post;
1014
1015 a = (ngx_array_t **) (p + cmd->offset);
1016
1017 if (*a == NGX_CONF_UNSET_PTR) {
1018 *a = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t));
1019 if (*a == NULL) {
1020 return NGX_CONF_ERROR;
1021 }
1022 }
1023
1024 s = ngx_array_push(*a);
1025 if (s == NULL) {
1026 return NGX_CONF_ERROR;
1027 }
1028
1029 value = cf->args->elts;
1030
1031 *s = value[1];
1032
1033 if (cmd->post) {
1034 post = cmd->post;
1035 return post->post_handler(cf, post, s);
1036 }
1037
1038 return NGX_CONF_OK;
1039 }
1040
1041
1042 char *
1043 ngx_conf_set_keyval_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1044 {
1045 char *p = conf;
1046
1047 ngx_str_t *value;
1048 ngx_array_t **a;
1049 ngx_keyval_t *kv;
1050 ngx_conf_post_t *post;
1051
1052 a = (ngx_array_t **) (p + cmd->offset);
1053
1054 if (*a == NULL) {
1055 *a = ngx_array_create(cf->pool, 4, sizeof(ngx_keyval_t));
1056 if (*a == NULL) {
1057 return NGX_CONF_ERROR;
1058 }
1059 }
1060
1061 kv = ngx_array_push(*a);
1062 if (kv == NULL) {
1063 return NGX_CONF_ERROR;
1064 }
1065
1066 value = cf->args->elts;
1067
1068 kv->key = value[1];
1069 kv->value = value[2];
1070
1071 if (cmd->post) {
1072 post = cmd->post;
1073 return post->post_handler(cf, post, kv);
1074 }
1075
1076 return NGX_CONF_OK;
1077 }
1078
1079
1080 char *
1081 ngx_conf_set_num_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1082 {
1083 char *p = conf;
1084
1085 ngx_int_t *np;
1086 ngx_str_t *value;
1087 ngx_conf_post_t *post;
1088
1089
1090 np = (ngx_int_t *) (p + cmd->offset);
1091
1092 if (*np != NGX_CONF_UNSET) {
1093 return "is duplicate";
1094 }
1095
1096 value = cf->args->elts;
1097 *np = ngx_atoi(value[1].data, value[1].len);
1098 if (*np == NGX_ERROR) {
1099 return "invalid number";
1100 }
1101
1102 if (cmd->post) {
1103 post = cmd->post;
1104 return post->post_handler(cf, post, np);
1105 }
1106
1107 return NGX_CONF_OK;
1108 }
1109
1110
1111 char *
1112 ngx_conf_set_size_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1113 {
1114 char *p = conf;
1115
1116 size_t *sp;
1117 ngx_str_t *value;
1118 ngx_conf_post_t *post;
1119
1120
1121 sp = (size_t *) (p + cmd->offset);
1122 if (*sp != NGX_CONF_UNSET_SIZE) {
1123 return "is duplicate";
1124 }
1125
1126 value = cf->args->elts;
1127
1128 *sp = ngx_parse_size(&value[1]);
1129 if (*sp == (size_t) NGX_ERROR) {
1130 return "invalid value";
1131 }
1132
1133 if (cmd->post) {
1134 post = cmd->post;
1135 return post->post_handler(cf, post, sp);
1136 }
1137
1138 return NGX_CONF_OK;
1139 }
1140
1141
1142 char *
1143 ngx_conf_set_off_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1144 {
1145 char *p = conf;
1146
1147 off_t *op;
1148 ngx_str_t *value;
1149 ngx_conf_post_t *post;
1150
1151
1152 op = (off_t *) (p + cmd->offset);
1153 if (*op != NGX_CONF_UNSET) {
1154 return "is duplicate";
1155 }
1156
1157 value = cf->args->elts;
1158
1159 *op = ngx_parse_offset(&value[1]);
1160 if (*op == (off_t) NGX_ERROR) {
1161 return "invalid value";
1162 }
1163
1164 if (cmd->post) {
1165 post = cmd->post;
1166 return post->post_handler(cf, post, op);
1167 }
1168
1169 return NGX_CONF_OK;
1170 }
1171
1172
1173 char *
1174 ngx_conf_set_msec_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1175 {
1176 char *p = conf;
1177
1178 ngx_msec_t *msp;
1179 ngx_str_t *value;
1180 ngx_conf_post_t *post;
1181
1182
1183 msp = (ngx_msec_t *) (p + cmd->offset);
1184 if (*msp != NGX_CONF_UNSET_MSEC) {
1185 return "is duplicate";
1186 }
1187
1188 value = cf->args->elts;
1189
1190 *msp = ngx_parse_time(&value[1], 0);
1191 if (*msp == (ngx_msec_t) NGX_ERROR) {
1192 return "invalid value";
1193 }
1194
1195 if (cmd->post) {
1196 post = cmd->post;
1197 return post->post_handler(cf, post, msp);
1198 }
1199
1200 return NGX_CONF_OK;
1201 }
1202
1203
1204 char *
1205 ngx_conf_set_sec_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1206 {
1207 char *p = conf;
1208
1209 time_t *sp;
1210 ngx_str_t *value;
1211 ngx_conf_post_t *post;
1212
1213
1214 sp = (time_t *) (p + cmd->offset);
1215 if (*sp != NGX_CONF_UNSET) {
1216 return "is duplicate";
1217 }
1218
1219 value = cf->args->elts;
1220
1221 *sp = ngx_parse_time(&value[1], 1);
1222 if (*sp == (time_t) NGX_ERROR) {
1223 return "invalid value";
1224 }
1225
1226 if (cmd->post) {
1227 post = cmd->post;
1228 return post->post_handler(cf, post, sp);
1229 }
1230
1231 return NGX_CONF_OK;
1232 }
1233
1234
1235 char *
1236 ngx_conf_set_bufs_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1237 {
1238 char *p = conf;
1239
1240 ngx_str_t *value;
1241 ngx_bufs_t *bufs;
1242
1243
1244 bufs = (ngx_bufs_t *) (p + cmd->offset);
1245 if (bufs->num) {
1246 return "is duplicate";
1247 }
1248
1249 value = cf->args->elts;
1250
1251 bufs->num = ngx_atoi(value[1].data, value[1].len);
1252 if (bufs->num == NGX_ERROR || bufs->num == 0) {
1253 return "invalid value";
1254 }
1255
1256 bufs->size = ngx_parse_size(&value[2]);
1257 if (bufs->size == (size_t) NGX_ERROR || bufs->size == 0) {
1258 return "invalid value";
1259 }
1260
1261 return NGX_CONF_OK;
1262 }
1263
1264
1265 char *
1266 ngx_conf_set_enum_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1267 {
1268 char *p = conf;
1269
1270 ngx_uint_t *np, i;
1271 ngx_str_t *value;
1272 ngx_conf_enum_t *e;
1273
1274 np = (ngx_uint_t *) (p + cmd->offset);
1275
1276 if (*np != NGX_CONF_UNSET_UINT) {
1277 return "is duplicate";
1278 }
1279
1280 value = cf->args->elts;
1281 e = cmd->post;
1282
1283 for (i = 0; e[i].name.len != 0; i++) {
1284 if (e[i].name.len != value[1].len
1285 || ngx_strcasecmp(e[i].name.data, value[1].data) != 0)
1286 {
1287 continue;
1288 }
1289
1290 *np = e[i].value;
1291
1292 return NGX_CONF_OK;
1293 }
1294
1295 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1296 "invalid value \"%s\"", value[1].data);
1297
1298 return NGX_CONF_ERROR;
1299 }
1300
1301
1302 char *
1303 ngx_conf_set_bitmask_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1304 {
1305 char *p = conf;
1306
1307 ngx_uint_t *np, i, m;
1308 ngx_str_t *value;
1309 ngx_conf_bitmask_t *mask;
1310
1311
1312 np = (ngx_uint_t *) (p + cmd->offset);
1313 value = cf->args->elts;
1314 mask = cmd->post;
1315
1316 for (i = 1; i < cf->args->nelts; i++) {
1317 for (m = 0; mask[m].name.len != 0; m++) {
1318
1319 if (mask[m].name.len != value[i].len
1320 || ngx_strcasecmp(mask[m].name.data, value[i].data) != 0)
1321 {
1322 continue;
1323 }
1324
1325 if (*np & mask[m].mask) {
1326 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1327 "duplicate value \"%s\"", value[i].data);
1328
1329 } else {
1330 *np |= mask[m].mask;
1331 }
1332
1333 break;
1334 }
1335
1336 if (mask[m].name.len == 0) {
1337 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1338 "invalid value \"%s\"", value[i].data);
1339
1340 return NGX_CONF_ERROR;
1341 }
1342 }
1343
1344 return NGX_CONF_OK;
1345 }
1346
1347
1348 #if 0
1349
1350 char *
1351 ngx_conf_unsupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1352 {
1353 return "unsupported on this platform";
1354 }
1355
1356 #endif
1357
1358
1359 char *
1360 ngx_conf_deprecated(ngx_conf_t *cf, void *post, void *data)
1361 {
1362 ngx_conf_deprecated_t *d = post;
1363
1364 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1365 "the \"%s\" directive is deprecated, "
1366 "use the \"%s\" directive instead",
1367 d->old_name, d->new_name);
1368
1369 return NGX_CONF_OK;
1370 }
1371
1372
1373 char *
1374 ngx_conf_check_num_bounds(ngx_conf_t *cf, void *post, void *data)
1375 {
1376 ngx_conf_num_bounds_t *bounds = post;
1377 ngx_int_t *np = data;
1378
1379 if (bounds->high == -1) {
1380 if (*np >= bounds->low) {
1381 return NGX_CONF_OK;
1382 }
1383
1384 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1385 "value must be equal to or greater than %i",
1386 bounds->low);
1387
1388 return NGX_CONF_ERROR;
1389 }
1390
1391 if (*np >= bounds->low && *np <= bounds->high) {
1392 return NGX_CONF_OK;
1393 }
1394
1395 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1396 "value must be between %i and %i",
1397 bounds->low, bounds->high);
1398
1399 return NGX_CONF_ERROR;
1400 }ngx_conf_file源码分析
最新推荐文章于 2024-02-06 15:17:09 发布
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