Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_random_index_module.c @ 5707:31dd63dcb9ea
Events: use eventfd() instead of syscall(SYS_eventfd) if possible.
This fixes --with-file-aio support on systems that lack eventfd()
syscall, notably aarch64 Linux.
The syscall(SYS_eventfd) may still be necessary on systems that
have eventfd() syscall in the kernel but lack it in glibc, e.g.
as seen in the current CentOS 5 release.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Fri, 23 May 2014 16:37:05 +0400 |
parents | 778ef9c3fd2d |
children | 47daf95d0138 |
rev | line source |
---|---|
2235 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
2235 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 typedef struct { | |
14 ngx_flag_t enable; | |
15 } ngx_http_random_index_loc_conf_t; | |
16 | |
17 | |
18 #define NGX_HTTP_RANDOM_INDEX_PREALLOCATE 50 | |
19 | |
20 | |
21 static ngx_int_t ngx_http_random_index_error(ngx_http_request_t *r, | |
22 ngx_dir_t *dir, ngx_str_t *name); | |
2266
6223d5a9e87f
back out $random_index variable
Igor Sysoev <igor@sysoev.ru>
parents:
2258
diff
changeset
|
23 static ngx_int_t ngx_http_random_index_init(ngx_conf_t *cf); |
2235 | 24 static void *ngx_http_random_index_create_loc_conf(ngx_conf_t *cf); |
25 static char *ngx_http_random_index_merge_loc_conf(ngx_conf_t *cf, | |
26 void *parent, void *child); | |
27 | |
28 | |
29 static ngx_command_t ngx_http_random_index_commands[] = { | |
30 | |
31 { ngx_string("random_index"), | |
32 NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
33 ngx_conf_set_flag_slot, | |
34 NGX_HTTP_LOC_CONF_OFFSET, | |
35 offsetof(ngx_http_random_index_loc_conf_t, enable), | |
36 NULL }, | |
37 | |
38 ngx_null_command | |
39 }; | |
40 | |
41 | |
42 static ngx_http_module_t ngx_http_random_index_module_ctx = { | |
2266
6223d5a9e87f
back out $random_index variable
Igor Sysoev <igor@sysoev.ru>
parents:
2258
diff
changeset
|
43 NULL, /* preconfiguration */ |
2235 | 44 ngx_http_random_index_init, /* postconfiguration */ |
45 | |
46 NULL, /* create main configuration */ | |
47 NULL, /* init main configuration */ | |
48 | |
49 NULL, /* create server configuration */ | |
50 NULL, /* merge server configuration */ | |
51 | |
4499
778ef9c3fd2d
Fixed spelling in single-line comments.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
52 ngx_http_random_index_create_loc_conf, /* create location configuration */ |
778ef9c3fd2d
Fixed spelling in single-line comments.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
53 ngx_http_random_index_merge_loc_conf /* merge location configuration */ |
2235 | 54 }; |
55 | |
56 | |
57 ngx_module_t ngx_http_random_index_module = { | |
58 NGX_MODULE_V1, | |
59 &ngx_http_random_index_module_ctx, /* module context */ | |
60 ngx_http_random_index_commands, /* module directives */ | |
61 NGX_HTTP_MODULE, /* module type */ | |
62 NULL, /* init master */ | |
63 NULL, /* init module */ | |
64 NULL, /* init process */ | |
65 NULL, /* init thread */ | |
66 NULL, /* exit thread */ | |
67 NULL, /* exit process */ | |
68 NULL, /* exit master */ | |
69 NGX_MODULE_V1_PADDING | |
70 }; | |
71 | |
72 | |
73 static ngx_int_t | |
74 ngx_http_random_index_handler(ngx_http_request_t *r) | |
75 { | |
76 u_char *last, *filename; | |
77 size_t len, allocated, root; | |
78 ngx_err_t err; | |
79 ngx_int_t rc; | |
80 ngx_str_t path, uri, *name; | |
81 ngx_dir_t dir; | |
82 ngx_uint_t n, level; | |
83 ngx_array_t names; | |
84 ngx_http_random_index_loc_conf_t *rlcf; | |
85 | |
86 if (r->uri.data[r->uri.len - 1] != '/') { | |
87 return NGX_DECLINED; | |
88 } | |
89 | |
90 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) { | |
91 return NGX_DECLINED; | |
92 } | |
93 | |
94 rlcf = ngx_http_get_module_loc_conf(r, ngx_http_random_index_module); | |
95 | |
96 if (!rlcf->enable) { | |
97 return NGX_DECLINED; | |
98 } | |
99 | |
100 #if (NGX_HAVE_D_TYPE) | |
101 len = NGX_DIR_MASK_LEN; | |
102 #else | |
103 len = NGX_HTTP_RANDOM_INDEX_PREALLOCATE; | |
104 #endif | |
105 | |
106 last = ngx_http_map_uri_to_path(r, &path, &root, len); | |
107 if (last == NULL) { | |
108 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
109 } | |
110 | |
111 allocated = path.len; | |
112 | |
113 path.len = last - path.data - 1; | |
114 path.data[path.len] = '\0'; | |
115 | |
116 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
117 "http random index: \"%s\"", path.data); | |
118 | |
119 if (ngx_open_dir(&path, &dir) == NGX_ERROR) { | |
120 err = ngx_errno; | |
121 | |
122 if (err == NGX_ENOENT | |
123 || err == NGX_ENOTDIR | |
124 || err == NGX_ENAMETOOLONG) | |
125 { | |
126 level = NGX_LOG_ERR; | |
127 rc = NGX_HTTP_NOT_FOUND; | |
128 | |
129 } else if (err == NGX_EACCES) { | |
130 level = NGX_LOG_ERR; | |
131 rc = NGX_HTTP_FORBIDDEN; | |
132 | |
133 } else { | |
134 level = NGX_LOG_CRIT; | |
135 rc = NGX_HTTP_INTERNAL_SERVER_ERROR; | |
136 } | |
137 | |
138 ngx_log_error(level, r->connection->log, err, | |
139 ngx_open_dir_n " \"%s\" failed", path.data); | |
140 | |
141 return rc; | |
142 } | |
143 | |
144 if (ngx_array_init(&names, r->pool, 32, sizeof(ngx_str_t)) != NGX_OK) { | |
145 return ngx_http_random_index_error(r, &dir, &path); | |
146 } | |
147 | |
148 filename = path.data; | |
149 filename[path.len] = '/'; | |
150 | |
151 for ( ;; ) { | |
152 ngx_set_errno(0); | |
153 | |
154 if (ngx_read_dir(&dir) == NGX_ERROR) { | |
155 err = ngx_errno; | |
156 | |
157 if (err != NGX_ENOMOREFILES) { | |
158 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err, | |
159 ngx_read_dir_n " \"%V\" failed", &path); | |
160 return ngx_http_random_index_error(r, &dir, &path); | |
161 } | |
162 | |
163 break; | |
164 } | |
165 | |
166 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
167 "http random index file: \"%s\"", ngx_de_name(&dir)); | |
168 | |
169 if (ngx_de_name(&dir)[0] == '.') { | |
170 continue; | |
171 } | |
172 | |
173 len = ngx_de_namelen(&dir); | |
174 | |
3203
a56cccd588e6
update r3201: ngx_http_random_index_module should behave consistently
Igor Sysoev <igor@sysoev.ru>
parents:
3200
diff
changeset
|
175 if (dir.type == 0 || ngx_de_is_link(&dir)) { |
2235 | 176 |
177 /* 1 byte for '/' and 1 byte for terminating '\0' */ | |
178 | |
179 if (path.len + 1 + len + 1 > allocated) { | |
180 allocated = path.len + 1 + len + 1 | |
181 + NGX_HTTP_RANDOM_INDEX_PREALLOCATE; | |
182 | |
183 filename = ngx_pnalloc(r->pool, allocated); | |
184 if (filename == NULL) { | |
185 return ngx_http_random_index_error(r, &dir, &path); | |
186 } | |
187 | |
188 last = ngx_cpystrn(filename, path.data, path.len + 1); | |
189 *last++ = '/'; | |
190 } | |
191 | |
192 ngx_cpystrn(last, ngx_de_name(&dir), len + 1); | |
193 | |
194 if (ngx_de_info(filename, &dir) == NGX_FILE_ERROR) { | |
195 err = ngx_errno; | |
196 | |
197 if (err != NGX_ENOENT) { | |
198 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err, | |
199 ngx_de_info_n " \"%s\" failed", filename); | |
200 return ngx_http_random_index_error(r, &dir, &path); | |
201 } | |
202 | |
203 if (ngx_de_link_info(filename, &dir) == NGX_FILE_ERROR) { | |
204 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno, | |
205 ngx_de_link_info_n " \"%s\" failed", | |
206 filename); | |
207 return ngx_http_random_index_error(r, &dir, &path); | |
208 } | |
209 } | |
210 } | |
211 | |
212 if (!ngx_de_is_file(&dir)) { | |
213 continue; | |
214 } | |
215 | |
216 name = ngx_array_push(&names); | |
217 if (name == NULL) { | |
218 return ngx_http_random_index_error(r, &dir, &path); | |
219 } | |
220 | |
221 name->len = len; | |
222 | |
223 name->data = ngx_pnalloc(r->pool, len); | |
224 if (name->data == NULL) { | |
225 return ngx_http_random_index_error(r, &dir, &path); | |
226 } | |
227 | |
228 ngx_memcpy(name->data, ngx_de_name(&dir), len); | |
229 } | |
230 | |
231 if (ngx_close_dir(&dir) == NGX_ERROR) { | |
232 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno, | |
233 ngx_close_dir_n " \"%s\" failed", &path); | |
234 } | |
235 | |
236 n = names.nelts; | |
237 | |
238 if (n == 0) { | |
239 return NGX_DECLINED; | |
240 } | |
241 | |
242 name = names.elts; | |
243 | |
244 n = (ngx_uint_t) (((uint64_t) ngx_random() * n) / 0x80000000); | |
245 | |
246 uri.len = r->uri.len + name[n].len; | |
247 | |
248 uri.data = ngx_pnalloc(r->pool, uri.len); | |
249 if (uri.data == NULL) { | |
250 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
251 } | |
252 | |
253 last = ngx_copy(uri.data, r->uri.data, r->uri.len); | |
254 ngx_memcpy(last, name[n].data, name[n].len); | |
255 | |
256 return ngx_http_internal_redirect(r, &uri, &r->args); | |
257 } | |
258 | |
259 | |
260 static ngx_int_t | |
261 ngx_http_random_index_error(ngx_http_request_t *r, ngx_dir_t *dir, | |
262 ngx_str_t *name) | |
263 { | |
264 if (ngx_close_dir(dir) == NGX_ERROR) { | |
265 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno, | |
266 ngx_close_dir_n " \"%V\" failed", name); | |
267 } | |
268 | |
269 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
270 } | |
271 | |
272 | |
273 static void * | |
274 ngx_http_random_index_create_loc_conf(ngx_conf_t *cf) | |
275 { | |
276 ngx_http_random_index_loc_conf_t *conf; | |
277 | |
278 conf = ngx_palloc(cf->pool, sizeof(ngx_http_random_index_loc_conf_t)); | |
279 if (conf == NULL) { | |
2912
c7d57b539248
return NULL instead of NGX_CONF_ERROR on a create conf failure
Igor Sysoev <igor@sysoev.ru>
parents:
2721
diff
changeset
|
280 return NULL; |
2235 | 281 } |
282 | |
283 conf->enable = NGX_CONF_UNSET; | |
284 | |
285 return conf; | |
286 } | |
287 | |
288 | |
289 static char * | |
290 ngx_http_random_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
291 { | |
292 ngx_http_random_index_loc_conf_t *prev = parent; | |
293 ngx_http_random_index_loc_conf_t *conf = child; | |
294 | |
295 ngx_conf_merge_value(conf->enable, prev->enable, 0); | |
296 | |
297 return NGX_CONF_OK; | |
298 } | |
299 | |
300 | |
301 static ngx_int_t | |
302 ngx_http_random_index_init(ngx_conf_t *cf) | |
303 { | |
304 ngx_http_handler_pt *h; | |
305 ngx_http_core_main_conf_t *cmcf; | |
306 | |
307 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
308 | |
309 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); | |
310 if (h == NULL) { | |
311 return NGX_ERROR; | |
312 } | |
313 | |
314 *h = ngx_http_random_index_handler; | |
315 | |
316 return NGX_OK; | |
317 } |