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1 | /* | |
2 | * Copyright 2018 Rubén Beltrán del Río | |
3 | * | |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the | |
5 | * License. You may obtain a copy of the License at | |
6 | * | |
7 | * http://www.apache.org/licenses/LICENSE-2.0 | |
8 | * | |
9 | * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an | |
10 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the | |
11 | * specific language governing permissions and limitations under the License. | |
12 | */ | |
13 | ||
14 | #include <ngx_config.h> | |
15 | #include <ngx_core.h> | |
16 | #include <ngx_http.h> | |
17 | ||
18 | /* | |
19 | * Declarations | |
20 | */ | |
21 | ||
22 | /* Constants */ | |
23 | ||
24 | const ngx_uint_t WEEK_LENGTH = 7; | |
25 | const char * CLOSED_TOKEN = "closed"; | |
26 | const ngx_str_t TIME_REGEX = ngx_string("([0-9]{1,2})(?:\\:([0-9]{2}))?\\-([0-9]{1,2})(?:\\:([0-9]{2}))?"); | |
27 | const ngx_str_t HEAD_HTML = ngx_string("<!doctype html><html><head><title>This website is currently closed!</title></head><body><h1>This website is currently closed!</h1><p>This website has closed for the day, please check our office hours below:</p><ul>"); | |
28 | const ngx_str_t OPEN_SERVER_TIME_HTML = ngx_string("</ul><p><em>Current Server Time is: "); | |
29 | const ngx_str_t CLOSE_SERVER_TIME_HTML = ngx_string("</em></p>"); | |
30 | const ngx_str_t FOOT_HTML = ngx_string("</body></html>"); | |
31 | const char * DAY_NAMES[7] = { | |
32 | "Monday", | |
33 | "Tuesday", | |
34 | "Wednesday", | |
35 | "Thursday", | |
36 | "Friday", | |
37 | "Saturday", | |
38 | "Sunday" | |
39 | }; | |
40 | ||
41 | /* Main Configuration Structure */ | |
42 | ||
43 | typedef struct { | |
44 | ngx_array_t *office_hours; | |
45 | ngx_str_t additional_information; | |
46 | } ngx_http_office_hours_conf_t; | |
47 | ||
48 | /* Lifecycle Functions For Module Context */ | |
49 | ||
50 | static void *ngx_http_office_hours_create_conf(ngx_conf_t * cf); | |
51 | static char *ngx_http_office_hours_merge_conf(ngx_conf_t * cf, | |
52 | void *parent, void *child); | |
53 | static ngx_int_t ngx_http_office_hours_init(ngx_conf_t * cf); | |
54 | ||
55 | /* Configuration Handler */ | |
56 | ||
57 | static char *ngx_http_office_hours(ngx_conf_t * cf, ngx_command_t * cmd, | |
58 | void *conf); | |
59 | ||
60 | /* Filter Storage */ | |
61 | ||
62 | static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
63 | static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
64 | ||
65 | /* Utility Functions */ | |
66 | static ngx_uint_t ** parse_office_hours(ngx_array_t * office_hours); | |
67 | static ngx_uint_t * parse_office_hours_string(ngx_str_t office_hours); | |
68 | static ngx_flag_t within_office_hours(ngx_uint_t ** office_hours); | |
69 | static ngx_uint_t get_day_of_week(time_t time); | |
70 | static ngx_uint_t get_seconds_of_day(time_t time); | |
71 | static ngx_uint_t parse_number(ngx_str_t string, ngx_uint_t start, ngx_uint_t end); | |
72 | static ngx_str_t create_output_html(ngx_http_office_hours_conf_t * conf); | |
73 | static char * format_hours(ngx_uint_t * seconds, char * day); | |
74 | static char * format_seconds(ngx_uint_t seconds); | |
75 | static char * left_pad(unsigned int number); | |
76 | ||
77 | /* Globals */ | |
78 | ngx_regex_compile_t rc; | |
79 | ngx_str_t OUTPUT_HTML; | |
80 | ||
81 | /* | |
82 | * Module Definitions | |
83 | */ | |
84 | ||
85 | /* Module Directives */ | |
86 | ||
87 | static ngx_command_t ngx_http_office_hours_commands[] = { | |
88 | { | |
89 | ngx_string("office_hours"), | |
90 | NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1 | NGX_CONF_TAKE2 | NGX_CONF_TAKE3 | NGX_CONF_TAKE4 | NGX_CONF_TAKE5 | NGX_CONF_TAKE6 | NGX_CONF_TAKE7, | |
91 | ngx_http_office_hours, | |
92 | NGX_HTTP_LOC_CONF_OFFSET, | |
93 | offsetof(ngx_http_office_hours_conf_t, office_hours), | |
94 | NULL | |
95 | }, | |
96 | { | |
97 | ngx_string("office_hours_additional_information"), | |
98 | NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1 | NGX_CONF_TAKE2 | NGX_CONF_TAKE3 | NGX_CONF_TAKE4 | NGX_CONF_TAKE5 | NGX_CONF_TAKE6 | NGX_CONF_TAKE7, | |
99 | ngx_conf_set_str_slot, | |
100 | NGX_HTTP_LOC_CONF_OFFSET, | |
101 | offsetof(ngx_http_office_hours_conf_t, additional_information), | |
102 | NULL | |
103 | }, | |
104 | ||
105 | ngx_null_command | |
106 | }; | |
107 | ||
108 | /* Module Context */ | |
109 | ||
110 | static ngx_http_module_t ngx_http_office_hours_filter_module_ctx = { | |
111 | NULL, /* Preconfiguration */ | |
112 | ngx_http_office_hours_init, /* Postconfiguration */ | |
113 | ||
114 | NULL, /* Create main configuration */ | |
115 | NULL, /* Initialize main configuration */ | |
116 | ||
117 | NULL, /* Create server configuration */ | |
118 | NULL, /* Merge server configuration */ | |
119 | ||
120 | ngx_http_office_hours_create_conf, /* Create location configuration */ | |
121 | ngx_http_office_hours_merge_conf /* Merge location configuration */ | |
122 | }; | |
123 | ||
124 | /* Module Definition */ | |
125 | ||
126 | ngx_module_t ngx_http_office_hours_filter_module = { | |
127 | NGX_MODULE_V1, //Module Version | |
128 | &ngx_http_office_hours_filter_module_ctx, //Module context | |
129 | ngx_http_office_hours_commands, //Module commands | |
130 | NGX_HTTP_MODULE, //Module Type | |
131 | NULL, //Initialize Master | |
132 | NULL, //Initialize Module | |
133 | NULL, //Initialize Process | |
134 | NULL, //Initialize Thread | |
135 | NULL, //Exit Thread | |
136 | NULL, //Exit Process | |
137 | NULL, //Exit Master | |
138 | NGX_MODULE_V1_PADDING | |
139 | }; | |
140 | ||
141 | /* | |
142 | * Main Header Filter | |
143 | * If the current time is within office hours, it goes to the next | |
144 | * handler. Otherwise it sets the headers to 403 | |
145 | */ | |
146 | ||
147 | static ngx_int_t | |
148 | ngx_http_office_hours_header_filter(ngx_http_request_t * r) | |
149 | { | |
150 | ||
151 | ngx_uint_t ** parsed_office_hours; | |
152 | ngx_http_office_hours_conf_t *conf; | |
153 | ||
154 | conf = | |
155 | ngx_http_get_module_loc_conf(r, | |
156 | ngx_http_office_hours_filter_module); | |
157 | ||
158 | if (conf->office_hours == NULL) { | |
159 | ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, | |
160 | "Office hours disabled"); | |
161 | return ngx_http_next_header_filter(r); | |
162 | } | |
163 | ||
164 | parsed_office_hours = parse_office_hours(conf->office_hours); | |
165 | ||
166 | if (within_office_hours(parsed_office_hours)) { | |
167 | ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, | |
168 | "Within office hours"); | |
169 | return ngx_http_next_header_filter(r); | |
170 | } | |
171 | ||
172 | ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, | |
173 | "Outside office hours"); | |
174 | ||
175 | if (OUTPUT_HTML.data == NULL) { | |
176 | OUTPUT_HTML = create_output_html(conf); | |
177 | } | |
178 | ||
179 | r->headers_out.status = NGX_HTTP_FORBIDDEN; | |
180 | r->headers_out.content_length_n = OUTPUT_HTML.len; | |
181 | ||
182 | return ngx_http_next_header_filter(r); | |
183 | } | |
184 | ||
185 | /* | |
186 | * Main Body Filter | |
187 | * If the current time is within office hours, it goes to the next | |
188 | * handler. Otherwise it replaces the body with the office hours. | |
189 | */ | |
190 | ||
191 | static ngx_int_t | |
192 | ngx_http_office_hours_body_filter(ngx_http_request_t * r, ngx_chain_t *in) | |
193 | { | |
194 | ||
195 | ngx_buf_t *b; | |
196 | ngx_uint_t ** parsed_office_hours; | |
197 | ngx_chain_t out; | |
198 | ngx_http_office_hours_conf_t *conf; | |
199 | ||
200 | conf = | |
201 | ngx_http_get_module_loc_conf(r, | |
202 | ngx_http_office_hours_filter_module); | |
203 | ||
204 | if (conf->office_hours == NULL) { | |
205 | ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, | |
206 | "Office hours disabled"); | |
207 | return ngx_http_next_body_filter(r, in); | |
208 | } | |
209 | ||
210 | parsed_office_hours = parse_office_hours(conf->office_hours); | |
211 | ||
212 | if (within_office_hours(parsed_office_hours)) { | |
213 | ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, | |
214 | "Within office hours"); | |
215 | return ngx_http_next_body_filter(r, in); | |
216 | } | |
217 | ||
218 | ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, | |
219 | "Outside office hours"); | |
220 | ||
221 | if (OUTPUT_HTML.data == NULL) { | |
222 | OUTPUT_HTML = create_output_html(conf); | |
223 | } | |
224 | ||
225 | b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); | |
226 | if (b == NULL) { | |
227 | ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "Failed to allocate response buffer."); | |
228 | return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
229 | } | |
230 | ||
231 | out.buf = b; | |
232 | out.next = NULL; | |
233 | ||
234 | b->start = OUTPUT_HTML.data; | |
235 | b->pos = b->start; | |
236 | b->end = OUTPUT_HTML.data + OUTPUT_HTML.len; | |
237 | b->last = b->end; | |
238 | ||
239 | b->memory = 1; | |
240 | b->last_buf = 1; | |
241 | ||
242 | return ngx_http_next_body_filter(r, &out); | |
243 | } | |
244 | ||
245 | /* | |
246 | * Callback for `office_hours ` directive | |
247 | * Reads the configuration loaded from the config file(cf) | |
248 | * And writes it to the right place in the module configuration(conf) | |
249 | */ | |
250 | ||
251 | static char *ngx_http_office_hours(ngx_conf_t * cf, ngx_command_t * cmd, | |
252 | void *conf) | |
253 | { | |
254 | ||
255 | char *conf_structure = conf; | |
256 | ||
257 | ngx_str_t *hours, *value; | |
258 | ngx_array_t **office_hours; | |
259 | ngx_uint_t i; | |
260 | ||
261 | /* Gets the array from the config structure using the defined | |
262 | * offset, and if the pointer is unset it creates a new one. | |
263 | * (The first element is the directive itself, so we should be | |
264 | * offset by 1) | |
265 | */ | |
266 | office_hours = (ngx_array_t **) (conf_structure + cmd->offset); | |
267 | ||
268 | if (*office_hours == NGX_CONF_UNSET_PTR) { | |
269 | *office_hours = ngx_array_create(cf->pool, cf->args->nelts - 1, | |
270 | sizeof(ngx_str_t)); | |
271 | ||
272 | if (*office_hours == NULL) { | |
273 | return NGX_CONF_ERROR; | |
274 | } | |
275 | } | |
276 | value = cf->args->elts; | |
277 | ||
278 | for (i = 1; i < cf->args->nelts; ++i) { | |
279 | hours = ngx_array_push(*office_hours); | |
280 | if (hours == NULL) { | |
281 | return NGX_CONF_ERROR; | |
282 | } | |
283 | *hours = value[i]; | |
284 | } | |
285 | ||
286 | return NGX_CONF_OK; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Config Creator | |
291 | * Initializes the configuration structure | |
292 | */ | |
293 | ||
294 | static void *ngx_http_office_hours_create_conf(ngx_conf_t * cf) | |
295 | { | |
296 | ||
297 | ngx_http_office_hours_conf_t *conf; | |
298 | ||
299 | conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_office_hours_conf_t)); | |
300 | ||
301 | if (conf == NULL) { | |
302 | return NULL; | |
303 | } | |
304 | conf->office_hours = NGX_CONF_UNSET_PTR; | |
305 | ||
306 | return conf; | |
307 | } | |
308 | ||
309 | /* | |
310 | * Merge Config Values | |
311 | * Sets the defaults for the configuration and merges | |
312 | * with other configurations | |
313 | */ | |
314 | ||
315 | static char *ngx_http_office_hours_merge_conf(ngx_conf_t * cf, | |
316 | void *parent, void *child) | |
317 | { | |
318 | ||
319 | ngx_http_office_hours_conf_t *prev = parent; | |
320 | ngx_http_office_hours_conf_t *conf = child; | |
321 | ||
322 | ngx_conf_merge_ptr_value(conf->office_hours, prev->office_hours, NULL); | |
323 | ||
324 | return NGX_CONF_OK; | |
325 | } | |
326 | ||
327 | /* | |
328 | * Parse the office hour strings in the configuration file | |
329 | * to fill out the hours array (in seconds) | |
330 | */ | |
331 | ||
332 | static ngx_uint_t ** parse_office_hours(ngx_array_t * office_hours) | |
333 | { | |
334 | ||
335 | ngx_str_t *hours; | |
336 | ngx_uint_t ** parsed_office_hours; | |
337 | ngx_uint_t i, j; | |
338 | ||
339 | parsed_office_hours = malloc(7 * sizeof(ngx_uint_t *)); | |
340 | ||
341 | hours = office_hours->elts; | |
342 | ||
343 | /* | |
344 | * On the configuration file, the leftmost element | |
345 | * always applies to all remaining days, all others | |
346 | * are read from right to left. So first we will apply | |
347 | * the initial override, and then iterate based on the | |
348 | * number of overrides | |
349 | */ | |
350 | ||
351 | for (i = 0; i < WEEK_LENGTH + 1 - office_hours->nelts; ++i) { | |
352 | parsed_office_hours[i] = parse_office_hours_string(hours[0]); | |
353 | } | |
354 | ||
355 | for (i = 1; i < office_hours->nelts; ++i) { | |
356 | j = WEEK_LENGTH - office_hours->nelts + i; | |
357 | parsed_office_hours[j] = parse_office_hours_string(hours[i]); | |
358 | } | |
359 | ||
360 | return parsed_office_hours; | |
361 | } | |
362 | ||
363 | /* | |
364 | * Given a time string or the closed token, return a tuple | |
365 | * of numbers representing opening and closing hours | |
366 | */ | |
367 | ||
368 | static ngx_uint_t * parse_office_hours_string(ngx_str_t office_hours) | |
369 | { | |
370 | ||
371 | int captures[(1 + 4) * 3]; | |
372 | ngx_int_t n; | |
373 | ngx_uint_t * parsed_hours; | |
374 | ||
375 | parsed_hours = malloc(2 * sizeof(ngx_uint_t)); | |
376 | ||
377 | if(ngx_strcmp(office_hours.data, CLOSED_TOKEN) == 0) { | |
378 | parsed_hours[0] = 0; | |
379 | parsed_hours[1] = 0; | |
380 | return parsed_hours; | |
381 | } | |
382 | ||
383 | n = ngx_regex_exec(rc.regex, &office_hours, captures, (1 + 4) * 3); | |
384 | ||
385 | if (n >= 0) { | |
386 | /* Opening Hours */ | |
387 | ||
388 | parsed_hours[0] = 60 * 60 * parse_number(office_hours, captures[2], captures[3]); | |
389 | parsed_hours[0] = parsed_hours[0] + 60 * parse_number(office_hours, captures[4], captures[5]); | |
390 | ||
391 | parsed_hours[1] = 60 * 60 * parse_number(office_hours, captures[6], captures[7]); | |
392 | parsed_hours[1] = parsed_hours[1] + 60 * parse_number(office_hours, captures[8], captures[9]); | |
393 | ||
394 | return parsed_hours; | |
395 | } | |
396 | ||
397 | /* Non-matching strings count as open */ | |
398 | ||
399 | parsed_hours[0] = 0; | |
400 | parsed_hours[1] = 86400; | |
401 | return parsed_hours; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Given an office hours array, it returns whether or not | |
406 | * it is currently within office hours. | |
407 | */ | |
408 | ||
409 | static ngx_flag_t within_office_hours(ngx_uint_t ** office_hours) | |
410 | { | |
411 | ||
412 | time_t now; | |
413 | ngx_uint_t day_of_week, seconds_of_day; | |
414 | ngx_uint_t * current_hours; | |
415 | ||
416 | ngx_time_update(); | |
417 | now = ngx_time(); | |
418 | day_of_week = get_day_of_week(now); | |
419 | seconds_of_day = get_seconds_of_day(now); | |
420 | current_hours = office_hours[day_of_week]; | |
421 | ||
422 | return seconds_of_day >= current_hours[0] && seconds_of_day <= current_hours[1]; | |
423 | } | |
424 | ||
425 | /* | |
426 | * Calculate the day of the week given a timestamp | |
427 | */ | |
428 | ||
429 | static ngx_uint_t get_day_of_week(time_t time) | |
430 | { | |
431 | ||
432 | /* Epoch was thursday, so add 3 so we start on monday */ | |
433 | return (time / 86400 + 3) % 7; | |
434 | } | |
435 | ||
436 | /* | |
437 | * Calculate the number of seconds elapsed today | |
438 | */ | |
439 | ||
440 | static ngx_uint_t get_seconds_of_day(time_t time) | |
441 | { | |
442 | ||
443 | return time - (time / 86400) * 86400; | |
444 | } | |
445 | ||
446 | /* | |
447 | * Parses a string, returns 0 if match was not found | |
448 | */ | |
449 | ||
450 | static ngx_uint_t parse_number(ngx_str_t string, ngx_uint_t start, ngx_uint_t end) | |
451 | { | |
452 | ||
453 | if (end - start == 0) { | |
454 | return 0; | |
455 | } | |
456 | ||
457 | return ngx_atoi(&string.data[start], end - start); | |
458 | } | |
459 | ||
460 | /* | |
461 | * Given the current office hours configuration it creates the custom | |
462 | * HTML | |
463 | */ | |
464 | ||
465 | static ngx_str_t create_output_html(ngx_http_office_hours_conf_t * conf) | |
466 | { | |
467 | ||
468 | char * output_buffer; | |
469 | time_t now; | |
470 | ngx_str_t output_html; | |
471 | ngx_uint_t i, seconds_of_day; | |
472 | ngx_uint_t ** parsed_office_hours; | |
473 | ||
474 | size_t base_size = 1024; | |
475 | size_t additional_info_size = conf->additional_information.len; | |
476 | size_t buffer_size = base_size + additional_info_size + 1; | |
477 | output_buffer = malloc(buffer_size * sizeof(char)); | |
478 | ||
479 | /* UH-OH we couldn't allocate the bufer */ | |
480 | if (!output_buffer) { | |
481 | output_html.data = NULL; | |
482 | output_html.len = 0; | |
483 | return output_html; | |
484 | } | |
485 | ||
486 | parsed_office_hours = parse_office_hours(conf->office_hours); | |
487 | now = ngx_time(); | |
488 | seconds_of_day = get_seconds_of_day(now); | |
489 | ||
490 | int written = 0; | |
491 | ||
492 | written += snprintf(output_buffer + written, buffer_size - written, "%s", (char *) HEAD_HTML.data); | |
493 | ||
494 | for (i = 0; i < 7; ++i) { | |
495 | written += snprintf(output_buffer + written, buffer_size - written, "%s", format_hours(parsed_office_hours[i], (char *) DAY_NAMES[i])); | |
496 | } | |
497 | ||
498 | written += snprintf(output_buffer + written, buffer_size - written, "%s", (char *) OPEN_SERVER_TIME_HTML.data); | |
499 | written += snprintf(output_buffer + written, buffer_size - written, "%s", format_seconds(seconds_of_day)); | |
500 | written += snprintf(output_buffer + written, buffer_size - written, "%s", (char *) CLOSE_SERVER_TIME_HTML.data); | |
501 | ||
502 | if (conf->additional_information.len > 0) { | |
503 | char additional_info[conf->additional_information.len + 1]; | |
504 | ngx_memcpy(additional_info, conf->additional_information.data, conf->additional_information.len); | |
505 | additional_info[conf->additional_information.len] = '\0'; | |
506 | written += snprintf(output_buffer + written, buffer_size - written, "%s", additional_info); | |
507 | } | |
508 | ||
509 | snprintf(output_buffer + written, buffer_size - written, "%s", (char *) FOOT_HTML.data); | |
510 | ||
511 | output_html.data = (unsigned char *) output_buffer; | |
512 | output_html.len = strlen(output_buffer); | |
513 | ||
514 | return output_html; | |
515 | } | |
516 | ||
517 | /* | |
518 | * Given a tuple of seconds and a day name, outputs an HTML | |
519 | * string containing the formatted data as a list item | |
520 | */ | |
521 | ||
522 | static char * format_hours(ngx_uint_t * hours, char * day) | |
523 | { | |
524 | ||
525 | char * output_html; | |
526 | ||
527 | output_html = malloc(64 * sizeof(char)); | |
528 | if (hours[0] == hours[1]) { | |
529 | sprintf(output_html, "<li><strong>%s</strong>: CLOSED</li>", | |
530 | day | |
531 | ); | |
532 | return output_html; | |
533 | } | |
534 | ||
535 | sprintf(output_html, "<li><strong>%s</strong>: %s - %s</li>", | |
536 | day, | |
537 | (char *) format_seconds(hours[0]), | |
538 | (char *) format_seconds(hours[1]) | |
539 | ); | |
540 | ||
541 | return output_html; | |
542 | } | |
543 | ||
544 | /* | |
545 | * Given seconds of the day, it returns a string showing | |
546 | * HH:MM in 24 hour format | |
547 | */ | |
548 | ||
549 | static char * format_seconds(ngx_uint_t seconds) | |
550 | { | |
551 | ||
552 | char * output_html; | |
553 | unsigned int hours, minutes; | |
554 | ||
555 | output_html = malloc(6 * sizeof(char)); | |
556 | ||
557 | hours = seconds / 60 / 60; | |
558 | minutes = (seconds / 60) % 60; | |
559 | ||
560 | sprintf(output_html, "%s:%s", | |
561 | left_pad(hours), | |
562 | left_pad(minutes) | |
563 | ); | |
564 | ||
565 | return output_html; | |
566 | } | |
567 | ||
568 | /* | |
569 | * Returns a number as a string adding 0 if < 10 | |
570 | */ | |
571 | ||
572 | static char * left_pad(unsigned int number) | |
573 | { | |
574 | ||
575 | char * output_string; | |
576 | char * padding; | |
577 | ||
578 | padding = ""; | |
579 | output_string = malloc(4 * sizeof(char)); | |
580 | ||
581 | if (number < 10) { | |
582 | padding = "0"; | |
583 | } | |
584 | ||
585 | snprintf(output_string, 4, "%s%u", padding, number); | |
586 | ||
587 | return output_string; | |
588 | } | |
589 | ||
590 | /* | |
591 | * Postconfig Initialization Handler | |
592 | * Sets the request filter at the top of the chain | |
593 | */ | |
594 | ||
595 | static ngx_int_t ngx_http_office_hours_init(ngx_conf_t * cf) | |
596 | { | |
597 | ||
598 | ngx_http_next_header_filter = ngx_http_top_header_filter; | |
599 | ngx_http_top_header_filter = ngx_http_office_hours_header_filter; | |
600 | ||
601 | ngx_http_next_body_filter = ngx_http_top_body_filter; | |
602 | ngx_http_top_body_filter = ngx_http_office_hours_body_filter; | |
603 | ||
604 | rc.pattern = TIME_REGEX; | |
605 | rc.pool = cf->pool; | |
606 | if (ngx_regex_compile(&rc) != NGX_OK) { | |
607 | return NGX_ERROR; | |
608 | } | |
609 | ||
610 | return NGX_OK; | |
611 | } |