Mercurial > hg > nginx
annotate src/http/modules/ngx_http_limit_req_module.c @ 3525:eb156d98a9fa
fix delay in limit_req
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 24 May 2010 07:43:39 +0000 |
parents | 30f841e2536d |
children | 57aecfdcac3d |
rev | line source |
---|---|
980 | 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 typedef struct { | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
13 u_char color; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
14 u_char dummy; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
15 u_short len; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
16 ngx_queue_t queue; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
17 ngx_msec_t last; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
18 /* integer value, 1 corresponds to 0.001 r/s */ |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
19 ngx_uint_t excess; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
20 u_char data[1]; |
2294 | 21 } ngx_http_limit_req_node_t; |
980 | 22 |
23 | |
24 typedef struct { | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
25 ngx_rbtree_t rbtree; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
26 ngx_rbtree_node_t sentinel; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
27 ngx_queue_t queue; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
28 } ngx_http_limit_req_shctx_t; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
29 |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
30 |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
31 typedef struct { |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
32 ngx_http_limit_req_shctx_t *sh; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
33 ngx_slab_pool_t *shpool; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
34 /* integer value, 1 corresponds to 0.001 r/s */ |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
35 ngx_uint_t rate; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
36 ngx_int_t index; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
37 ngx_str_t var; |
2294 | 38 } ngx_http_limit_req_ctx_t; |
987 | 39 |
40 | |
41 typedef struct { | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
42 ngx_shm_zone_t *shm_zone; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
43 /* integer value, 1 corresponds to 0.001 r/s */ |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
44 ngx_uint_t burst; |
3185 | 45 ngx_uint_t limit_log_level; |
46 ngx_uint_t delay_log_level; | |
47 | |
48 ngx_uint_t nodelay; /* unsigned nodelay:1 */ | |
2294 | 49 } ngx_http_limit_req_conf_t; |
980 | 50 |
51 | |
2294 | 52 static void ngx_http_limit_req_delay(ngx_http_request_t *r); |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
53 static ngx_int_t ngx_http_limit_req_lookup(ngx_http_limit_req_conf_t *lrcf, |
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
54 ngx_uint_t hash, u_char *data, size_t len, ngx_http_limit_req_node_t **lrp); |
2294 | 55 static void ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, |
56 ngx_uint_t n); | |
980 | 57 |
2294 | 58 static void *ngx_http_limit_req_create_conf(ngx_conf_t *cf); |
59 static char *ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, | |
980 | 60 void *child); |
2294 | 61 static char *ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
980 | 62 void *conf); |
2294 | 63 static char *ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, |
980 | 64 void *conf); |
2294 | 65 static ngx_int_t ngx_http_limit_req_init(ngx_conf_t *cf); |
980 | 66 |
67 | |
3185 | 68 static ngx_conf_enum_t ngx_http_limit_req_log_levels[] = { |
69 { ngx_string("info"), NGX_LOG_INFO }, | |
70 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
71 { ngx_string("warn"), NGX_LOG_WARN }, | |
72 { ngx_string("error"), NGX_LOG_ERR }, | |
73 { ngx_null_string, 0 } | |
74 }; | |
75 | |
76 | |
2294 | 77 static ngx_command_t ngx_http_limit_req_commands[] = { |
980 | 78 |
2294 | 79 { ngx_string("limit_req_zone"), |
987 | 80 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3, |
2294 | 81 ngx_http_limit_req_zone, |
980 | 82 0, |
83 0, | |
84 NULL }, | |
85 | |
2294 | 86 { ngx_string("limit_req"), |
87 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123, | |
88 ngx_http_limit_req, | |
980 | 89 NGX_HTTP_LOC_CONF_OFFSET, |
90 0, | |
91 NULL }, | |
92 | |
3185 | 93 { ngx_string("limit_req_log_level"), |
94 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
95 ngx_conf_set_enum_slot, | |
96 NGX_HTTP_LOC_CONF_OFFSET, | |
97 offsetof(ngx_http_limit_req_conf_t, limit_log_level), | |
98 &ngx_http_limit_req_log_levels }, | |
99 | |
980 | 100 ngx_null_command |
101 }; | |
102 | |
103 | |
2294 | 104 static ngx_http_module_t ngx_http_limit_req_module_ctx = { |
980 | 105 NULL, /* preconfiguration */ |
2294 | 106 ngx_http_limit_req_init, /* postconfiguration */ |
980 | 107 |
108 NULL, /* create main configuration */ | |
109 NULL, /* init main configuration */ | |
110 | |
111 NULL, /* create server configuration */ | |
112 NULL, /* merge server configuration */ | |
113 | |
2294 | 114 ngx_http_limit_req_create_conf, /* create location configration */ |
115 ngx_http_limit_req_merge_conf /* merge location configration */ | |
980 | 116 }; |
117 | |
118 | |
2294 | 119 ngx_module_t ngx_http_limit_req_module = { |
980 | 120 NGX_MODULE_V1, |
2294 | 121 &ngx_http_limit_req_module_ctx, /* module context */ |
122 ngx_http_limit_req_commands, /* module directives */ | |
980 | 123 NGX_HTTP_MODULE, /* module type */ |
124 NULL, /* init master */ | |
125 NULL, /* init module */ | |
126 NULL, /* init process */ | |
127 NULL, /* init thread */ | |
128 NULL, /* exit thread */ | |
129 NULL, /* exit process */ | |
130 NULL, /* exit master */ | |
131 NGX_MODULE_V1_PADDING | |
132 }; | |
133 | |
134 | |
135 static ngx_int_t | |
2294 | 136 ngx_http_limit_req_handler(ngx_http_request_t *r) |
980 | 137 { |
2294 | 138 size_t len, n; |
139 uint32_t hash; | |
140 ngx_int_t rc; | |
2313 | 141 ngx_uint_t excess; |
2294 | 142 ngx_time_t *tp; |
143 ngx_rbtree_node_t *node; | |
144 ngx_http_variable_value_t *vv; | |
145 ngx_http_limit_req_ctx_t *ctx; | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
146 ngx_http_limit_req_node_t *lr; |
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
147 ngx_http_limit_req_conf_t *lrcf; |
980 | 148 |
2294 | 149 if (r->main->limit_req_set) { |
984
dd128232e6ba
count connection once per request
Igor Sysoev <igor@sysoev.ru>
parents:
981
diff
changeset
|
150 return NGX_DECLINED; |
dd128232e6ba
count connection once per request
Igor Sysoev <igor@sysoev.ru>
parents:
981
diff
changeset
|
151 } |
dd128232e6ba
count connection once per request
Igor Sysoev <igor@sysoev.ru>
parents:
981
diff
changeset
|
152 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
153 lrcf = ngx_http_get_module_loc_conf(r, ngx_http_limit_req_module); |
980 | 154 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
155 if (lrcf->shm_zone == NULL) { |
980 | 156 return NGX_DECLINED; |
157 } | |
158 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
159 ctx = lrcf->shm_zone->data; |
987 | 160 |
161 vv = ngx_http_get_indexed_variable(r, ctx->index); | |
980 | 162 |
163 if (vv == NULL || vv->not_found) { | |
164 return NGX_DECLINED; | |
165 } | |
166 | |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
167 len = vv->len; |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
168 |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
169 if (len == 0) { |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
170 return NGX_DECLINED; |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
171 } |
984
dd128232e6ba
count connection once per request
Igor Sysoev <igor@sysoev.ru>
parents:
981
diff
changeset
|
172 |
2294 | 173 if (len > 65535) { |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
174 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
175 "the value of the \"%V\" variable " |
2294 | 176 "is more than 65535 bytes: \"%v\"", |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
177 &ctx->var, vv); |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
178 return NGX_DECLINED; |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
179 } |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
180 |
2294 | 181 r->main->limit_req_set = 1; |
980 | 182 |
183 hash = ngx_crc32_short(vv->data, len); | |
184 | |
2294 | 185 ngx_shmtx_lock(&ctx->shpool->mutex); |
186 | |
187 ngx_http_limit_req_expire(ctx, 1); | |
188 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
189 rc = ngx_http_limit_req_lookup(lrcf, hash, vv->data, len, &lr); |
2294 | 190 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
191 if (lr) { |
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
192 ngx_queue_remove(&lr->queue); |
2294 | 193 |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
194 ngx_queue_insert_head(&ctx->sh->queue, &lr->queue); |
2294 | 195 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
196 excess = lr->excess; |
2294 | 197 |
198 } else { | |
2313 | 199 excess = 0; |
980 | 200 } |
201 | |
2313 | 202 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
2973 | 203 "limit_req: %i %ui.%03ui", rc, excess / 1000, excess % 1000); |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
204 |
2294 | 205 if (rc == NGX_BUSY) { |
206 ngx_shmtx_unlock(&ctx->shpool->mutex); | |
1012
11ffb8e4753f
stop rbtree search early if equal hash was found
Igor Sysoev <igor@sysoev.ru>
parents:
1011
diff
changeset
|
207 |
3185 | 208 ngx_log_error(lrcf->limit_log_level, r->connection->log, 0, |
2376
29d89920a749
*) add zone name while logging 503 error reason
Igor Sysoev <igor@sysoev.ru>
parents:
2375
diff
changeset
|
209 "limiting requests, excess: %ui.%03ui by zone \"%V\"", |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
210 excess / 1000, excess % 1000, &lrcf->shm_zone->shm.name); |
980 | 211 |
212 return NGX_HTTP_SERVICE_UNAVAILABLE; | |
213 } | |
214 | |
2294 | 215 if (rc == NGX_AGAIN) { |
216 ngx_shmtx_unlock(&ctx->shpool->mutex); | |
217 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
218 if (lrcf->nodelay) { |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
219 return NGX_DECLINED; |
2294 | 220 } |
221 | |
3185 | 222 ngx_log_error(lrcf->delay_log_level, r->connection->log, 0, |
2376
29d89920a749
*) add zone name while logging 503 error reason
Igor Sysoev <igor@sysoev.ru>
parents:
2375
diff
changeset
|
223 "delaying request, excess: %ui.%03ui, by zone \"%V\"", |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
224 excess / 1000, excess % 1000, &lrcf->shm_zone->shm.name); |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
225 |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
226 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
227 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
228 } |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
229 |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
230 r->read_event_handler = ngx_http_test_reading; |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
231 r->write_event_handler = ngx_http_limit_req_delay; |
3525 | 232 ngx_add_timer(r->connection->write, |
233 (ngx_msec_t) excess * 1000 / ctx->rate); | |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
234 |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
235 return NGX_AGAIN; |
2294 | 236 } |
237 | |
238 if (rc == NGX_OK) { | |
239 goto done; | |
240 } | |
241 | |
242 /* rc == NGX_DECLINED */ | |
243 | |
244 n = offsetof(ngx_rbtree_node_t, color) | |
245 + offsetof(ngx_http_limit_req_node_t, data) | |
246 + len; | |
247 | |
248 node = ngx_slab_alloc_locked(ctx->shpool, n); | |
249 if (node == NULL) { | |
250 | |
251 ngx_http_limit_req_expire(ctx, 0); | |
252 | |
253 node = ngx_slab_alloc_locked(ctx->shpool, n); | |
254 if (node == NULL) { | |
255 ngx_shmtx_unlock(&ctx->shpool->mutex); | |
256 return NGX_HTTP_SERVICE_UNAVAILABLE; | |
257 } | |
258 } | |
259 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
260 lr = (ngx_http_limit_req_node_t *) &node->color; |
980 | 261 |
262 node->key = hash; | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
263 lr->len = (u_char) len; |
2294 | 264 |
265 tp = ngx_timeofday(); | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
266 lr->last = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
2294 | 267 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
268 lr->excess = 0; |
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
269 ngx_memcpy(lr->data, vv->data, len); |
980 | 270 |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
271 ngx_rbtree_insert(&ctx->sh->rbtree, node); |
980 | 272 |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
273 ngx_queue_insert_head(&ctx->sh->queue, &lr->queue); |
2294 | 274 |
980 | 275 done: |
276 | |
2294 | 277 ngx_shmtx_unlock(&ctx->shpool->mutex); |
980 | 278 |
279 return NGX_DECLINED; | |
280 } | |
281 | |
282 | |
283 static void | |
2294 | 284 ngx_http_limit_req_delay(ngx_http_request_t *r) |
285 { | |
2972
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
286 ngx_event_t *wev; |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
287 |
2294 | 288 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
2973 | 289 "limit_req delay"); |
2294 | 290 |
2972
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
291 wev = r->connection->write; |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
292 |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
293 if (!wev->timedout) { |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
294 |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
295 if (ngx_handle_write_event(wev, 0) != NGX_OK) { |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
296 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
297 } |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
298 |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
299 return; |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
300 } |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
301 |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
302 wev->timedout = 0; |
c5ad288f851d
fix client write event handling in ngx_http_limit_req_module
Igor Sysoev <igor@sysoev.ru>
parents:
2912
diff
changeset
|
303 |
2294 | 304 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
305 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); | |
306 return; | |
307 } | |
308 | |
309 r->read_event_handler = ngx_http_block_reading; | |
310 r->write_event_handler = ngx_http_core_run_phases; | |
311 | |
312 ngx_http_core_run_phases(r); | |
313 } | |
314 | |
315 | |
316 static void | |
317 ngx_http_limit_req_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
318 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
319 { |
2294 | 320 ngx_rbtree_node_t **p; |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
321 ngx_http_limit_req_node_t *lrn, *lrnt; |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
322 |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
323 for ( ;; ) { |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
324 |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
325 if (node->key < temp->key) { |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
326 |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
327 p = &temp->left; |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
328 |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
329 } else if (node->key > temp->key) { |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
330 |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
331 p = &temp->right; |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
332 |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
333 } else { /* node->key == temp->key */ |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
334 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
335 lrn = (ngx_http_limit_req_node_t *) &node->color; |
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
336 lrnt = (ngx_http_limit_req_node_t *) &temp->color; |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
337 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
338 p = (ngx_memn2cmp(lrn->data, lrnt->data, lrn->len, lrnt->len) < 0) |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
339 ? &temp->left : &temp->right; |
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
340 } |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
341 |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
342 if (*p == sentinel) { |
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
343 break; |
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
344 } |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
345 |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
346 temp = *p; |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
347 } |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
348 |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
349 *p = node; |
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
350 node->parent = temp; |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
351 node->left = sentinel; |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
352 node->right = sentinel; |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
353 ngx_rbt_red(node); |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
354 } |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
355 |
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
356 |
2294 | 357 static ngx_int_t |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
358 ngx_http_limit_req_lookup(ngx_http_limit_req_conf_t *lrcf, ngx_uint_t hash, |
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
359 u_char *data, size_t len, ngx_http_limit_req_node_t **lrp) |
980 | 360 { |
2313 | 361 ngx_int_t rc, excess; |
2294 | 362 ngx_time_t *tp; |
363 ngx_msec_t now; | |
364 ngx_msec_int_t ms; | |
365 ngx_rbtree_node_t *node, *sentinel; | |
366 ngx_http_limit_req_ctx_t *ctx; | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
367 ngx_http_limit_req_node_t *lr; |
2294 | 368 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
369 ctx = lrcf->shm_zone->data; |
2294 | 370 |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
371 node = ctx->sh->rbtree.root; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
372 sentinel = ctx->sh->rbtree.sentinel; |
980 | 373 |
2294 | 374 while (node != sentinel) { |
375 | |
376 if (hash < node->key) { | |
377 node = node->left; | |
378 continue; | |
379 } | |
380 | |
381 if (hash > node->key) { | |
382 node = node->right; | |
383 continue; | |
384 } | |
385 | |
386 /* hash == node->key */ | |
387 | |
388 do { | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
389 lr = (ngx_http_limit_req_node_t *) &node->color; |
980 | 390 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
391 rc = ngx_memn2cmp(data, lr->data, len, (size_t) lr->len); |
2294 | 392 |
393 if (rc == 0) { | |
394 | |
395 tp = ngx_timeofday(); | |
980 | 396 |
2294 | 397 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
398 ms = (ngx_msec_int_t) (now - lr->last); |
2294 | 399 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
400 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
2294 | 401 |
3191 | 402 if (excess < 0) { |
403 excess = 0; | |
404 } | |
405 | |
3183
b87542338ac3
make limit_req to conform to the leaky bucket algorithm
Igor Sysoev <igor@sysoev.ru>
parents:
2973
diff
changeset
|
406 if ((ngx_uint_t) excess > lrcf->burst) { |
b87542338ac3
make limit_req to conform to the leaky bucket algorithm
Igor Sysoev <igor@sysoev.ru>
parents:
2973
diff
changeset
|
407 *lrp = lr; |
b87542338ac3
make limit_req to conform to the leaky bucket algorithm
Igor Sysoev <igor@sysoev.ru>
parents:
2973
diff
changeset
|
408 return NGX_BUSY; |
b87542338ac3
make limit_req to conform to the leaky bucket algorithm
Igor Sysoev <igor@sysoev.ru>
parents:
2973
diff
changeset
|
409 } |
b87542338ac3
make limit_req to conform to the leaky bucket algorithm
Igor Sysoev <igor@sysoev.ru>
parents:
2973
diff
changeset
|
410 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
411 lr->excess = excess; |
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
412 lr->last = now; |
980 | 413 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
414 *lrp = lr; |
2294 | 415 |
2313 | 416 if (excess) { |
2294 | 417 return NGX_AGAIN; |
418 } | |
980 | 419 |
2294 | 420 return NGX_OK; |
421 } | |
422 | |
423 node = (rc < 0) ? node->left : node->right; | |
424 | |
425 } while (node != sentinel && hash == node->key); | |
426 | |
427 break; | |
980 | 428 } |
429 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
430 *lrp = NULL; |
2294 | 431 |
432 return NGX_DECLINED; | |
433 } | |
434 | |
435 | |
436 static void | |
437 ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, ngx_uint_t n) | |
438 { | |
2313 | 439 ngx_int_t excess; |
2294 | 440 ngx_time_t *tp; |
441 ngx_msec_t now; | |
442 ngx_queue_t *q; | |
443 ngx_msec_int_t ms; | |
444 ngx_rbtree_node_t *node; | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
445 ngx_http_limit_req_node_t *lr; |
2294 | 446 |
447 tp = ngx_timeofday(); | |
448 | |
449 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); | |
450 | |
451 /* | |
452 * n == 1 deletes one or two zero rate entries | |
453 * n == 0 deletes oldest entry by force | |
454 * and one or two zero rate entries | |
455 */ | |
456 | |
457 while (n < 3) { | |
458 | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
459 if (ngx_queue_empty(&ctx->sh->queue)) { |
2294 | 460 return; |
461 } | |
462 | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
463 q = ngx_queue_last(&ctx->sh->queue); |
2294 | 464 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
465 lr = ngx_queue_data(q, ngx_http_limit_req_node_t, queue); |
2294 | 466 |
467 if (n++ != 0) { | |
468 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
469 ms = (ngx_msec_int_t) (now - lr->last); |
2294 | 470 ms = ngx_abs(ms); |
471 | |
472 if (ms < 60000) { | |
473 return; | |
474 } | |
475 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
476 excess = lr->excess - ctx->rate * ms / 1000; |
2294 | 477 |
2313 | 478 if (excess > 0) { |
2294 | 479 return; |
480 } | |
481 } | |
482 | |
483 ngx_queue_remove(q); | |
484 | |
485 node = (ngx_rbtree_node_t *) | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
486 ((u_char *) lr - offsetof(ngx_rbtree_node_t, color)); |
2294 | 487 |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
488 ngx_rbtree_delete(&ctx->sh->rbtree, node); |
2294 | 489 |
490 ngx_slab_free_locked(ctx->shpool, node); | |
491 } | |
980 | 492 } |
493 | |
494 | |
495 static ngx_int_t | |
2294 | 496 ngx_http_limit_req_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
980 | 497 { |
2294 | 498 ngx_http_limit_req_ctx_t *octx = data; |
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
499 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
500 size_t len; |
2294 | 501 ngx_http_limit_req_ctx_t *ctx; |
980 | 502 |
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
503 ctx = shm_zone->data; |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
504 |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
505 if (octx) { |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
506 if (ngx_strcmp(ctx->var.data, octx->var.data) != 0) { |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
507 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
2294 | 508 "limit_req \"%V\" uses the \"%V\" variable " |
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
509 "while previously it used the \"%V\" variable", |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
510 &shm_zone->shm.name, &ctx->var, &octx->var); |
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
511 return NGX_ERROR; |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
512 } |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
513 |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
514 ctx->sh = octx->sh; |
2294 | 515 ctx->shpool = octx->shpool; |
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
516 |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
517 return NGX_OK; |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
518 } |
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
519 |
2294 | 520 ctx->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
980 | 521 |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
522 if (shm_zone->shm.exists) { |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
523 ctx->sh = ctx->shpool->data; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
524 |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
525 return NGX_OK; |
980 | 526 } |
527 | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
528 ctx->sh = ngx_slab_alloc(ctx->shpool, sizeof(ngx_http_limit_req_shctx_t)); |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
529 if (ctx->sh == NULL) { |
980 | 530 return NGX_ERROR; |
531 } | |
532 | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
533 ctx->shpool->data = ctx->sh; |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
534 |
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
535 ngx_rbtree_init(&ctx->sh->rbtree, &ctx->sh->sentinel, |
2294 | 536 ngx_http_limit_req_rbtree_insert_value); |
537 | |
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
538 ngx_queue_init(&ctx->sh->queue); |
980 | 539 |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
540 len = sizeof(" in limit_req zone \"\"") + shm_zone->shm.name.len; |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
541 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
542 ctx->shpool->log_ctx = ngx_slab_alloc(ctx->shpool, len); |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
543 if (ctx->shpool->log_ctx == NULL) { |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
544 return NGX_ERROR; |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
545 } |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
546 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
547 ngx_sprintf(ctx->shpool->log_ctx, " in limit_req zone \"%V\"%Z", |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
548 &shm_zone->shm.name); |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
549 |
980 | 550 return NGX_OK; |
551 } | |
552 | |
553 | |
554 static void * | |
2294 | 555 ngx_http_limit_req_create_conf(ngx_conf_t *cf) |
980 | 556 { |
2294 | 557 ngx_http_limit_req_conf_t *conf; |
980 | 558 |
2294 | 559 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_conf_t)); |
980 | 560 if (conf == NULL) { |
2912
c7d57b539248
return NULL instead of NGX_CONF_ERROR on a create conf failure
Igor Sysoev <igor@sysoev.ru>
parents:
2720
diff
changeset
|
561 return NULL; |
980 | 562 } |
563 | |
564 /* | |
565 * set by ngx_pcalloc(): | |
566 * | |
567 * conf->shm_zone = NULL; | |
2375 | 568 * conf->burst = 0; |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
569 * conf->nodelay = 0; |
980 | 570 */ |
571 | |
3185 | 572 conf->limit_log_level = NGX_CONF_UNSET_UINT; |
573 | |
980 | 574 return conf; |
575 } | |
576 | |
577 | |
578 static char * | |
2294 | 579 ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
980 | 580 { |
2294 | 581 ngx_http_limit_req_conf_t *prev = parent; |
582 ngx_http_limit_req_conf_t *conf = child; | |
980 | 583 |
584 if (conf->shm_zone == NULL) { | |
585 *conf = *prev; | |
586 } | |
587 | |
3185 | 588 ngx_conf_merge_uint_value(conf->limit_log_level, prev->limit_log_level, |
589 NGX_LOG_ERR); | |
590 | |
591 conf->delay_log_level = (conf->limit_log_level == NGX_LOG_INFO) ? | |
592 NGX_LOG_INFO : conf->limit_log_level + 1; | |
593 | |
980 | 594 return NGX_CONF_OK; |
595 } | |
596 | |
597 | |
598 static char * | |
2294 | 599 ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
980 | 600 { |
2294 | 601 u_char *p; |
602 size_t size, len; | |
603 ngx_str_t *value, name, s; | |
604 ngx_int_t rate, scale; | |
605 ngx_uint_t i; | |
606 ngx_shm_zone_t *shm_zone; | |
607 ngx_http_limit_req_ctx_t *ctx; | |
980 | 608 |
609 value = cf->args->elts; | |
610 | |
2294 | 611 ctx = NULL; |
612 size = 0; | |
613 rate = 1; | |
614 scale = 1; | |
615 name.len = 0; | |
616 | |
617 for (i = 1; i < cf->args->nelts; i++) { | |
618 | |
619 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
620 | |
621 name.data = value[i].data + 5; | |
622 | |
623 p = (u_char *) ngx_strchr(name.data, ':'); | |
624 | |
625 if (p) { | |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
626 *p = '\0'; |
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
627 |
2294 | 628 name.len = p - name.data; |
629 | |
630 p++; | |
631 | |
632 s.len = value[i].data + value[i].len - p; | |
633 s.data = p; | |
634 | |
635 size = ngx_parse_size(&s); | |
636 if (size > 8191) { | |
637 continue; | |
638 } | |
639 } | |
640 | |
641 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
642 "invalid zone size \"%V\"", &value[i]); | |
643 return NGX_CONF_ERROR; | |
644 } | |
645 | |
646 if (ngx_strncmp(value[i].data, "rate=", 5) == 0) { | |
647 | |
648 len = value[i].len; | |
649 p = value[i].data + len - 3; | |
987 | 650 |
2294 | 651 if (ngx_strncmp(p, "r/s", 3) == 0) { |
652 scale = 1; | |
653 len -= 3; | |
654 | |
655 } else if (ngx_strncmp(p, "r/m", 3) == 0) { | |
656 scale = 60; | |
657 len -= 3; | |
658 } | |
659 | |
660 rate = ngx_atoi(value[i].data + 5, len - 5); | |
661 if (rate <= NGX_ERROR) { | |
662 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
663 "invalid rate \"%V\"", &value[i]); | |
664 return NGX_CONF_ERROR; | |
665 } | |
666 | |
667 continue; | |
668 } | |
669 | |
670 if (value[i].data[0] == '$') { | |
987 | 671 |
2294 | 672 value[i].len--; |
673 value[i].data++; | |
674 | |
675 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_ctx_t)); | |
676 if (ctx == NULL) { | |
677 return NGX_CONF_ERROR; | |
678 } | |
679 | |
680 ctx->index = ngx_http_get_variable_index(cf, &value[i]); | |
681 if (ctx->index == NGX_ERROR) { | |
682 return NGX_CONF_ERROR; | |
683 } | |
684 | |
685 ctx->var = value[i]; | |
686 | |
687 continue; | |
688 } | |
689 | |
690 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
691 "invalid parameter \"%V\"", &value[i]); | |
987 | 692 return NGX_CONF_ERROR; |
693 } | |
694 | |
2294 | 695 if (name.len == 0 || size == 0) { |
696 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
697 "\"%V\" must have \"zone\" parameter", | |
698 &cmd->name); | |
987 | 699 return NGX_CONF_ERROR; |
700 } | |
701 | |
2294 | 702 if (ctx == NULL) { |
980 | 703 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
2294 | 704 "no variable is defined for limit_req_zone \"%V\"", |
705 &cmd->name); | |
980 | 706 return NGX_CONF_ERROR; |
707 } | |
708 | |
2313 | 709 ctx->rate = rate * 1000 / scale; |
980 | 710 |
2294 | 711 shm_zone = ngx_shared_memory_add(cf, &name, size, |
712 &ngx_http_limit_req_module); | |
980 | 713 if (shm_zone == NULL) { |
714 return NGX_CONF_ERROR; | |
715 } | |
716 | |
987 | 717 if (shm_zone->data) { |
718 ctx = shm_zone->data; | |
719 | |
720 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
2294 | 721 "limit_req_zone \"%V\" is already bound to variable \"%V\"", |
722 &value[1], &ctx->var); | |
987 | 723 return NGX_CONF_ERROR; |
724 } | |
725 | |
2294 | 726 shm_zone->init = ngx_http_limit_req_init_zone; |
987 | 727 shm_zone->data = ctx; |
980 | 728 |
729 return NGX_CONF_OK; | |
730 } | |
731 | |
732 | |
733 static char * | |
2294 | 734 ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
980 | 735 { |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
736 ngx_http_limit_req_conf_t *lrcf = conf; |
980 | 737 |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
738 ngx_int_t burst; |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
739 ngx_str_t *value, s; |
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
740 ngx_uint_t i; |
2294 | 741 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
742 if (lrcf->shm_zone) { |
2294 | 743 return "is duplicate"; |
744 } | |
980 | 745 |
746 value = cf->args->elts; | |
747 | |
2294 | 748 burst = 0; |
749 | |
750 for (i = 1; i < cf->args->nelts; i++) { | |
751 | |
752 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
753 | |
754 s.len = value[i].len - 5; | |
755 s.data = value[i].data + 5; | |
756 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
757 lrcf->shm_zone = ngx_shared_memory_add(cf, &s, 0, |
2294 | 758 &ngx_http_limit_req_module); |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
759 if (lrcf->shm_zone == NULL) { |
2294 | 760 return NGX_CONF_ERROR; |
761 } | |
762 | |
763 continue; | |
764 } | |
765 | |
766 if (ngx_strncmp(value[i].data, "burst=", 6) == 0) { | |
767 | |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
768 burst = ngx_atoi(value[i].data + 6, value[i].len - 6); |
2294 | 769 if (burst <= 0) { |
770 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
771 "invalid burst rate \"%V\"", &value[i]); | |
772 return NGX_CONF_ERROR; | |
773 } | |
774 | |
775 continue; | |
776 } | |
777 | |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
778 if (ngx_strncmp(value[i].data, "nodelay", 7) == 0) { |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
779 lrcf->nodelay = 1; |
2294 | 780 continue; |
781 } | |
782 | |
783 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
784 "invalid parameter \"%V\"", &value[i]); | |
980 | 785 return NGX_CONF_ERROR; |
786 } | |
787 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
788 if (lrcf->shm_zone == NULL) { |
980 | 789 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
2294 | 790 "\"%V\" must have \"zone\" parameter", |
791 &cmd->name); | |
980 | 792 return NGX_CONF_ERROR; |
793 } | |
794 | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
795 if (lrcf->shm_zone->data == NULL) { |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
796 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
2294 | 797 "unknown limit_req_zone \"%V\"", |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
798 &lrcf->shm_zone->shm.name); |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
799 return NGX_CONF_ERROR; |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
800 } |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
801 |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
802 lrcf->burst = burst * 1000; |
980 | 803 |
804 return NGX_CONF_OK; | |
805 } | |
806 | |
807 | |
808 static ngx_int_t | |
2294 | 809 ngx_http_limit_req_init(ngx_conf_t *cf) |
980 | 810 { |
811 ngx_http_handler_pt *h; | |
812 ngx_http_core_main_conf_t *cmcf; | |
813 | |
814 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
815 | |
816 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
817 if (h == NULL) { | |
818 return NGX_ERROR; | |
819 } | |
820 | |
2294 | 821 *h = ngx_http_limit_req_handler; |
980 | 822 |
823 return NGX_OK; | |
824 } |