700
|
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 /*
|
|
13 * The module can check browser versions conforming to the following formats:
|
|
14 * X, X.X, X.X.X, and X.X.X.X. The maximum values of each format may be
|
|
15 * 4000, 4000.99, 4000.99.99, and 4000.99.99.99.
|
|
16 */
|
|
17
|
|
18
|
|
19 typedef struct {
|
|
20 u_char browser[12];
|
|
21 size_t skip;
|
|
22 size_t add;
|
|
23 u_char name[12];
|
|
24 } ngx_http_modern_browser_mask_t;
|
|
25
|
|
26
|
|
27 typedef struct {
|
|
28 ngx_uint_t version;
|
|
29 size_t skip;
|
|
30 size_t add;
|
|
31 u_char name[12];
|
|
32 } ngx_http_modern_browser_t;
|
|
33
|
|
34
|
|
35 typedef struct {
|
|
36 ngx_str_t name;
|
|
37 ngx_http_get_variable_pt handler;
|
|
38 } ngx_http_browser_t;
|
|
39
|
|
40
|
|
41 typedef struct {
|
|
42 ngx_array_t *modern_browsers;
|
|
43 ngx_http_variable_value_t *value;
|
|
44 } ngx_http_browser_conf_t;
|
|
45
|
|
46
|
|
47 static ngx_int_t ngx_http_msie_variable(ngx_http_request_t *r,
|
|
48 ngx_http_variable_value_t *v, uintptr_t data);
|
|
49 static ngx_int_t ngx_http_browser_add_variable(ngx_conf_t *cf);
|
|
50 static void *ngx_http_browser_create_conf(ngx_conf_t *cf);
|
|
51 static char *ngx_http_browser_merge_conf(ngx_conf_t *cf, void *parent,
|
|
52 void *child);
|
|
53 static int ngx_libc_cdecl ngx_http_modern_browser_sort(const void *one,
|
|
54 const void *two);
|
|
55 static char *ngx_http_modern_browser(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
56 void *conf);
|
|
57 static char *ngx_http_modern_browser_value(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
58 void *conf);
|
|
59
|
|
60
|
|
61 static ngx_command_t ngx_http_browser_commands[] = {
|
|
62
|
|
63 { ngx_string("modern_browser"),
|
|
64 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
|
|
65 ngx_http_modern_browser,
|
|
66 NGX_HTTP_LOC_CONF_OFFSET,
|
|
67 0,
|
|
68 NULL },
|
|
69
|
|
70 { ngx_string("modern_browser_value"),
|
|
71 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
72 ngx_http_modern_browser_value,
|
|
73 NGX_HTTP_LOC_CONF_OFFSET,
|
|
74 0,
|
|
75 NULL },
|
|
76
|
|
77 ngx_null_command
|
|
78 };
|
|
79
|
|
80
|
|
81 static ngx_http_module_t ngx_http_browser_module_ctx = {
|
|
82 ngx_http_browser_add_variable, /* preconfiguration */
|
|
83 NULL, /* postconfiguration */
|
|
84
|
|
85 NULL, /* create main configuration */
|
|
86 NULL, /* init main configuration */
|
|
87
|
|
88 NULL, /* create server configuration */
|
|
89 NULL, /* merge server configuration */
|
|
90
|
|
91 ngx_http_browser_create_conf, /* create location configuration */
|
|
92 ngx_http_browser_merge_conf /* merge location configuration */
|
|
93 };
|
|
94
|
|
95
|
|
96 ngx_module_t ngx_http_browser_module = {
|
|
97 NGX_MODULE_V1,
|
|
98 &ngx_http_browser_module_ctx, /* module context */
|
|
99 ngx_http_browser_commands, /* module directives */
|
|
100 NGX_HTTP_MODULE, /* module type */
|
|
101 NULL, /* init master */
|
|
102 NULL, /* init module */
|
|
103 NULL, /* init process */
|
|
104 NULL, /* init thread */
|
|
105 NULL, /* exit thread */
|
|
106 NULL, /* exit process */
|
|
107 NULL, /* exit master */
|
|
108 NGX_MODULE_V1_PADDING
|
|
109 };
|
|
110
|
|
111
|
|
112 static ngx_http_modern_browser_mask_t ngx_http_modern_browser_masks[] = {
|
|
113
|
|
114 /* Opera must be the first browser to check */
|
|
115
|
|
116 /*
|
|
117 * "Opera/7.50 (X11; FreeBSD i386; U) [en]"
|
|
118 * "Mozilla/5.0 (X11; FreeBSD i386; U) Opera 7.50 [en]"
|
|
119 * "Mozilla/4.0 (compatible; MSIE 6.0; X11; FreeBSD i386) Opera 7.50 [en]"
|
|
120 * "Opera/8.0 (Windows NT 5.1; U; ru)"
|
|
121 * "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; en) Opera 8.0"
|
|
122 * "Opera/9.01 (X11; FreeBSD 6 i386; U; en)"
|
|
123 */
|
|
124
|
|
125 { "opera",
|
|
126 0,
|
|
127 sizeof("Opera ") - 1,
|
|
128 "Opera"},
|
|
129
|
|
130 /* "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)" */
|
|
131
|
|
132 { "msie",
|
|
133 sizeof("Mozilla/4.0 (compatible; ") - 1,
|
|
134 sizeof("MSIE ") - 1,
|
|
135 "MSIE "},
|
|
136
|
|
137 /*
|
|
138 * "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020610"
|
|
139 * "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru-RU; rv:1.5) Gecko/20031006"
|
|
140 * "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru-RU; rv:1.6) Gecko/20040206
|
|
141 * Firefox/0.8"
|
|
142 * "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru-RU; rv:1.7.8)
|
|
143 * Gecko/20050511 Firefox/1.0.4"
|
|
144 * "Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.8.0.5) Gecko/20060729
|
|
145 * Firefox/1.5.0.5"
|
|
146 */
|
|
147
|
|
148 { "gecko",
|
|
149 sizeof("Mozilla/5.0 (") - 1,
|
|
150 sizeof("rv:") - 1,
|
|
151 "rv:"},
|
|
152
|
|
153 /*
|
|
154 * "Mozilla/5.0 (Macintosh; U; PPC Mac OS X; ru-ru) AppleWebKit/125.2
|
|
155 * (KHTML, like Gecko) Safari/125.7"
|
|
156 * "Mozilla/5.0 (SymbianOS/9.1; U; en-us) AppleWebKit/413
|
|
157 * (KHTML, like Gecko) Safari/413"
|
|
158 * "Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/418
|
|
159 * (KHTML, like Gecko) Safari/417.9.3"
|
|
160 * "Mozilla/5.0 (Macintosh; U; PPC Mac OS X; ru-ru) AppleWebKit/418.8
|
|
161 * (KHTML, like Gecko) Safari/419.3"
|
|
162 */
|
|
163
|
|
164 { "safari",
|
|
165 sizeof("Mozilla/5.0 (") - 1,
|
|
166 sizeof("Safari/") - 1,
|
|
167 "Safari/"},
|
|
168
|
|
169 /*
|
|
170 * "Mozilla/5.0 (compatible; Konqueror/3.1; Linux)"
|
|
171 * "Mozilla/5.0 (compatible; Konqueror/3.4; Linux) KHTML/3.4.2 (like Gecko)"
|
|
172 * "Mozilla/5.0 (compatible; Konqueror/3.5; FreeBSD) KHTML/3.5.1
|
|
173 * (like Gecko)"
|
|
174 */
|
|
175
|
|
176 { "konqueror",
|
|
177 sizeof("Mozilla/5.0 (compatible; ") - 1,
|
|
178 sizeof("Konqueror/") - 1,
|
|
179 "Konqueror/"},
|
|
180
|
|
181 { "", 0, 0, "" }
|
|
182
|
|
183 };
|
|
184
|
|
185
|
|
186 static ngx_http_browser_t ngx_http_browsers[] = {
|
|
187 { ngx_string("msie"), ngx_http_msie_variable },
|
|
188 { ngx_null_string, NULL }
|
|
189 };
|
|
190
|
|
191
|
|
192 static ngx_int_t
|
|
193 ngx_http_browser_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
|
|
194 uintptr_t data)
|
|
195 {
|
|
196 u_char *name, *ua, *last, c;
|
|
197 ngx_uint_t i, version, ver, scale;
|
|
198 ngx_http_browser_conf_t *cf;
|
|
199 ngx_http_modern_browser_t *browsers;
|
|
200
|
|
201 cf = ngx_http_get_module_loc_conf(r, ngx_http_browser_module);
|
|
202
|
|
203 if (cf->modern_browsers == NULL || cf->value == NULL) {
|
|
204 *v = ngx_http_variable_null_value;
|
|
205 return NGX_OK;
|
|
206 }
|
|
207
|
|
208 #if 0
|
|
209 if (!r->headers_in.msie && !r->headers_in.opera
|
|
210 && !r->headers_in.gecko && !r->headers_in.konqueror)
|
|
211 {
|
|
212 *v = ngx_http_variable_null_value;
|
|
213 return NGX_OK;
|
|
214 }
|
|
215 #endif
|
|
216
|
|
217 if (r->headers_in.user_agent == NULL) {
|
|
218 *v = ngx_http_variable_null_value;
|
|
219 return NGX_OK;
|
|
220 }
|
|
221
|
|
222
|
|
223 ua = r->headers_in.user_agent->value.data;
|
|
224 last = ua + r->headers_in.user_agent->value.len;
|
|
225
|
|
226 browsers = cf->modern_browsers->elts;
|
|
227
|
|
228 for (i = 0; i < cf->modern_browsers->nelts; i++) {
|
|
229 name = ua + browsers[i].skip;
|
|
230
|
|
231 if (name >= last) {
|
|
232 continue;
|
|
233 }
|
|
234
|
|
235 name = (u_char *) ngx_strstr(name, browsers[i].name);
|
|
236
|
|
237 if (name == NULL) {
|
|
238 continue;
|
|
239 }
|
|
240
|
|
241 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
242 "browser: \"%s\"", name);
|
|
243
|
|
244 name += browsers[i].add;
|
|
245
|
|
246 if (name >= last) {
|
713
|
247 continue;
|
700
|
248 }
|
|
249
|
|
250 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
251 "version: \"%ui\" \"%s\"", browsers[i].version, name);
|
|
252
|
|
253 version = 0;
|
|
254 ver = 0;
|
|
255 scale = 1000000;
|
|
256
|
|
257 while (name < last) {
|
|
258
|
|
259 c = *name++;
|
|
260
|
|
261 if (c >= '0' && c <= '9') {
|
|
262 ver = ver * 10 + (c - '0');
|
|
263 continue;
|
|
264 }
|
|
265
|
|
266 if (c == '.') {
|
|
267 version += ver * scale;
|
|
268
|
|
269 if (version > browsers[i].version) {
|
|
270 *v = *cf->value;
|
|
271 return NGX_OK;
|
|
272 }
|
|
273
|
|
274 ver = 0;
|
|
275 scale /= 100;
|
|
276 continue;
|
|
277 }
|
|
278
|
|
279 break;
|
|
280 }
|
|
281
|
|
282 version += ver * scale;
|
|
283
|
|
284 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
285 "version: \"%ui\" \"%ui\"",
|
|
286 browsers[i].version, version);
|
|
287
|
|
288 if (version >= browsers[i].version) {
|
|
289 *v = *cf->value;
|
|
290 return NGX_OK;
|
|
291 }
|
|
292 }
|
|
293
|
|
294 *v = ngx_http_variable_null_value;
|
|
295
|
|
296 return NGX_OK;
|
|
297 }
|
|
298
|
|
299
|
|
300 static ngx_int_t
|
|
301 ngx_http_msie_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
|
|
302 uintptr_t data)
|
|
303 {
|
|
304 if (r->headers_in.msie) {
|
|
305 *v = ngx_http_variable_true_value;
|
|
306
|
|
307 return NGX_OK;
|
|
308 }
|
|
309
|
|
310 *v = ngx_http_variable_null_value;
|
|
311
|
|
312 return NGX_OK;
|
|
313 }
|
|
314
|
|
315
|
|
316 static ngx_int_t
|
|
317 ngx_http_browser_add_variable(ngx_conf_t *cf)
|
|
318 {
|
|
319 ngx_http_browser_t *browser;
|
|
320 ngx_http_variable_t *var;
|
|
321
|
|
322 for (browser = ngx_http_browsers; browser->name.len; browser++) {
|
|
323
|
|
324 var = ngx_http_add_variable(cf, &browser->name, NGX_HTTP_VAR_CHANGABLE);
|
|
325 if (var == NULL) {
|
|
326 return NGX_ERROR;
|
|
327 }
|
|
328
|
|
329 var->get_handler = browser->handler;
|
|
330 }
|
|
331
|
|
332 return NGX_OK;
|
|
333 }
|
|
334
|
|
335
|
|
336 static void *
|
|
337 ngx_http_browser_create_conf(ngx_conf_t *cf)
|
|
338 {
|
|
339 ngx_http_browser_conf_t *conf;
|
|
340
|
|
341 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_browser_conf_t));
|
|
342 if (conf == NULL) {
|
|
343 return NGX_CONF_ERROR;
|
|
344 }
|
|
345
|
|
346 /*
|
|
347 * set by ngx_pcalloc():
|
|
348 *
|
|
349 * conf->browsers = NULL;
|
|
350 * conf->value = NULL;
|
|
351 */
|
|
352
|
|
353 return conf;
|
|
354 }
|
|
355
|
|
356
|
|
357 static char *
|
|
358 ngx_http_browser_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
359 {
|
|
360 ngx_http_browser_conf_t *prev = parent;
|
|
361 ngx_http_browser_conf_t *conf = child;
|
|
362
|
|
363 ngx_uint_t i, n;
|
|
364 ngx_http_modern_browser_t *browsers, *opera;
|
|
365
|
|
366 /*
|
|
367 * At the merge the skip field is used to store the browser slot,
|
|
368 * it will be used in sorting and then will overwritten
|
|
369 * with a real skip value. The zero value means Opera.
|
|
370 */
|
|
371
|
|
372 if (conf->modern_browsers == NULL) {
|
|
373 conf->modern_browsers = prev->modern_browsers;
|
|
374
|
|
375 } else {
|
|
376 browsers = conf->modern_browsers->elts;
|
|
377
|
|
378 for (i = 0; i < conf->modern_browsers->nelts; i++) {
|
|
379 if (browsers[i].skip == 0) {
|
|
380 goto found;
|
|
381 }
|
|
382 }
|
|
383
|
|
384 /*
|
|
385 * Opera may contain MSIE string, so if Opera was not enumerated
|
|
386 * as modern browsers, then add it and set a unreachable version
|
|
387 */
|
|
388
|
|
389 opera = ngx_array_push(conf->modern_browsers);
|
|
390 if (opera == NULL) {
|
|
391 return NGX_CONF_ERROR;
|
|
392 }
|
|
393
|
|
394 opera->skip = 0;
|
|
395 opera->version = 4001000000U;
|
|
396
|
|
397 browsers = conf->modern_browsers->elts;
|
|
398
|
|
399 found:
|
|
400
|
|
401 ngx_qsort(browsers, (size_t) conf->modern_browsers->nelts,
|
|
402 sizeof(ngx_http_modern_browser_t),
|
|
403 ngx_http_modern_browser_sort);
|
|
404
|
|
405 for (i = 0; i < conf->modern_browsers->nelts; i++) {
|
|
406 n = browsers[i].skip;
|
|
407
|
|
408 browsers[i].skip = ngx_http_modern_browser_masks[n].skip;
|
|
409 browsers[i].add = ngx_http_modern_browser_masks[n].add;
|
|
410 (void) ngx_cpystrn(browsers[i].name,
|
|
411 ngx_http_modern_browser_masks[n].name, 12);
|
|
412 }
|
|
413 }
|
|
414
|
|
415 if (conf->value == NULL) {
|
|
416 conf->value = prev->value;
|
|
417 }
|
|
418
|
|
419 return NGX_CONF_OK;
|
|
420 }
|
|
421
|
|
422
|
|
423 static int ngx_libc_cdecl
|
|
424 ngx_http_modern_browser_sort(const void *one, const void *two)
|
|
425 {
|
|
426 ngx_http_modern_browser_t *first = (ngx_http_modern_browser_t *) one;
|
|
427 ngx_http_modern_browser_t *second = (ngx_http_modern_browser_t *) two;
|
|
428
|
|
429 return (first->skip - second->skip);
|
|
430 }
|
|
431
|
|
432
|
|
433 static char *
|
|
434 ngx_http_modern_browser(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
435 {
|
|
436 ngx_http_browser_conf_t *bcf = conf;
|
|
437
|
|
438 u_char c;
|
|
439 ngx_str_t *value;
|
|
440 ngx_uint_t i, n, version, ver, scale;
|
|
441 ngx_http_modern_browser_t *browser;
|
|
442 ngx_http_modern_browser_mask_t *mask;
|
|
443
|
|
444 if (bcf->modern_browsers == NULL) {
|
|
445 bcf->modern_browsers = ngx_array_create(cf->pool, 4,
|
|
446 sizeof(ngx_http_modern_browser_t));
|
|
447 if (bcf->modern_browsers == NULL) {
|
|
448 return NGX_CONF_ERROR;
|
|
449 }
|
|
450 }
|
|
451
|
|
452 browser = ngx_array_push(bcf->modern_browsers);
|
|
453 if (browser == NULL) {
|
|
454 return NGX_CONF_ERROR;
|
|
455 }
|
|
456
|
|
457 value = cf->args->elts;
|
|
458
|
|
459 mask = ngx_http_modern_browser_masks;
|
|
460
|
|
461 for (n = 0; mask[n].browser[0] != '\0'; n++) {
|
|
462 if (ngx_strcasecmp(mask[n].browser, value[1].data) == 0) {
|
|
463 goto found;
|
|
464 }
|
|
465 }
|
|
466
|
|
467 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
468 "unknown browser name \"%V\"", &value[1]);
|
|
469
|
|
470 return NGX_CONF_ERROR;
|
|
471
|
|
472 found:
|
|
473
|
|
474 /*
|
|
475 * at this stage the skip field is used to store the browser slot,
|
|
476 * it will be used in sorting in merge stage and then will overwritten
|
|
477 * with a real value
|
|
478 */
|
|
479
|
|
480 browser->skip = n;
|
|
481
|
|
482 version = 0;
|
|
483 ver = 0;
|
|
484 scale = 1000000;
|
|
485
|
|
486 for (i = 0; i < value[2].len; i++) {
|
|
487
|
|
488 c = value[2].data[i];
|
|
489
|
|
490 if (c >= '0' && c <= '9') {
|
|
491 ver = ver * 10 + (c - '0');
|
|
492 continue;
|
|
493 }
|
|
494
|
|
495 if (c == '.') {
|
|
496 version += ver * scale;
|
|
497 ver = 0;
|
|
498 scale /= 100;
|
|
499 continue;
|
|
500 }
|
|
501
|
|
502 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
503 "invalid browser version \"%V\"", &value[2]);
|
|
504
|
|
505 return NGX_CONF_ERROR;
|
|
506 }
|
|
507
|
|
508 version += ver * scale;
|
|
509
|
|
510 browser->version = version;
|
|
511
|
|
512 return NGX_CONF_OK;
|
|
513 }
|
|
514
|
|
515
|
|
516 static char *
|
|
517 ngx_http_modern_browser_value(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
518 {
|
|
519 ngx_http_browser_conf_t *bcf = conf;
|
|
520
|
|
521 ngx_str_t *value, name;
|
|
522 ngx_http_variable_t *var;
|
|
523
|
|
524 value = cf->args->elts;
|
|
525
|
|
526 name.len = sizeof("browser") - 1;
|
|
527 name.data = (u_char *) "browser";
|
|
528
|
|
529 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGABLE);
|
|
530 if (var == NULL) {
|
|
531 return NGX_CONF_ERROR;
|
|
532 }
|
|
533
|
|
534 var->get_handler = ngx_http_browser_variable;
|
|
535
|
|
536 bcf->value = ngx_palloc(cf->pool, sizeof(ngx_http_variable_value_t));
|
|
537 if (bcf->value == NULL) {
|
|
538 return NGX_CONF_ERROR;
|
|
539 }
|
|
540
|
|
541 bcf->value->len = value[1].len;
|
|
542 bcf->value->valid = 1;
|
|
543 bcf->value->no_cachable = 0;
|
|
544 bcf->value->not_found = 0;
|
|
545 bcf->value->data = value[1].data;
|
|
546
|
|
547 return NGX_CONF_OK;
|
|
548 }
|