Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_limit_req_module.c @ 5860:c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
One intentional side effect of this change is that key is allowed only
in the first position. Previously, it was possible to specify the key
variable at any position, but that was never documented, and is contrary
to nginx configuration practice for positional parameters.
| author | Valentin Bartenev <vbart@nginx.com> |
|---|---|
| date | Wed, 24 Sep 2014 21:55:19 +0400 |
| parents | cda4fcb9294c |
| children | ecbb99aa0e12 |
| rev | line source |
|---|---|
| 980 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 980 | 5 */ |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_http.h> | |
| 11 | |
| 12 | |
| 13 typedef struct { | |
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14 u_char color; |
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15 u_char dummy; |
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16 u_short len; |
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17 ngx_queue_t queue; |
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18 ngx_msec_t last; |
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19 /* integer value, 1 corresponds to 0.001 r/s */ |
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20 ngx_uint_t excess; |
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21 ngx_uint_t count; |
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22 u_char data[1]; |
| 2294 | 23 } ngx_http_limit_req_node_t; |
| 980 | 24 |
| 25 | |
| 26 typedef struct { | |
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27 ngx_rbtree_t rbtree; |
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28 ngx_rbtree_node_t sentinel; |
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29 ngx_queue_t queue; |
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30 } ngx_http_limit_req_shctx_t; |
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31 |
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32 |
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33 typedef struct { |
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34 ngx_http_limit_req_shctx_t *sh; |
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35 ngx_slab_pool_t *shpool; |
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36 /* integer value, 1 corresponds to 0.001 r/s */ |
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37 ngx_uint_t rate; |
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38 ngx_int_t index; |
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39 ngx_str_t var; |
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40 ngx_http_limit_req_node_t *node; |
| 2294 | 41 } ngx_http_limit_req_ctx_t; |
| 987 | 42 |
| 43 | |
| 44 typedef struct { | |
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45 ngx_shm_zone_t *shm_zone; |
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46 /* integer value, 1 corresponds to 0.001 r/s */ |
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47 ngx_uint_t burst; |
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48 ngx_uint_t nodelay; /* unsigned nodelay:1 */ |
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49 } ngx_http_limit_req_limit_t; |
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50 |
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51 |
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52 typedef struct { |
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53 ngx_array_t limits; |
| 3185 | 54 ngx_uint_t limit_log_level; |
| 55 ngx_uint_t delay_log_level; | |
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56 ngx_uint_t status_code; |
| 2294 | 57 } ngx_http_limit_req_conf_t; |
| 980 | 58 |
| 59 | |
| 2294 | 60 static void ngx_http_limit_req_delay(ngx_http_request_t *r); |
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61 static ngx_int_t ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit, |
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62 ngx_uint_t hash, u_char *data, size_t len, ngx_uint_t *ep, |
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63 ngx_uint_t account); |
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64 static ngx_msec_t ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, |
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65 ngx_uint_t n, ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit); |
| 2294 | 66 static void ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, |
| 67 ngx_uint_t n); | |
| 980 | 68 |
| 2294 | 69 static void *ngx_http_limit_req_create_conf(ngx_conf_t *cf); |
| 70 static char *ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, | |
| 980 | 71 void *child); |
| 2294 | 72 static char *ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
| 980 | 73 void *conf); |
| 2294 | 74 static char *ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, |
| 980 | 75 void *conf); |
| 2294 | 76 static ngx_int_t ngx_http_limit_req_init(ngx_conf_t *cf); |
| 980 | 77 |
| 78 | |
| 3185 | 79 static ngx_conf_enum_t ngx_http_limit_req_log_levels[] = { |
| 80 { ngx_string("info"), NGX_LOG_INFO }, | |
| 81 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
| 82 { ngx_string("warn"), NGX_LOG_WARN }, | |
| 83 { ngx_string("error"), NGX_LOG_ERR }, | |
| 84 { ngx_null_string, 0 } | |
| 85 }; | |
| 86 | |
| 87 | |
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88 static ngx_conf_num_bounds_t ngx_http_limit_req_status_bounds = { |
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89 ngx_conf_check_num_bounds, 400, 599 |
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90 }; |
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91 |
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92 |
| 2294 | 93 static ngx_command_t ngx_http_limit_req_commands[] = { |
| 980 | 94 |
| 2294 | 95 { ngx_string("limit_req_zone"), |
| 987 | 96 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3, |
| 2294 | 97 ngx_http_limit_req_zone, |
| 980 | 98 0, |
| 99 0, | |
| 100 NULL }, | |
| 101 | |
| 2294 | 102 { ngx_string("limit_req"), |
| 103 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123, | |
| 104 ngx_http_limit_req, | |
| 980 | 105 NGX_HTTP_LOC_CONF_OFFSET, |
| 106 0, | |
| 107 NULL }, | |
| 108 | |
| 3185 | 109 { ngx_string("limit_req_log_level"), |
| 110 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 111 ngx_conf_set_enum_slot, | |
| 112 NGX_HTTP_LOC_CONF_OFFSET, | |
| 113 offsetof(ngx_http_limit_req_conf_t, limit_log_level), | |
| 114 &ngx_http_limit_req_log_levels }, | |
| 115 | |
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116 { ngx_string("limit_req_status"), |
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117 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
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118 ngx_conf_set_num_slot, |
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119 NGX_HTTP_LOC_CONF_OFFSET, |
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120 offsetof(ngx_http_limit_req_conf_t, status_code), |
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121 &ngx_http_limit_req_status_bounds }, |
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122 |
| 980 | 123 ngx_null_command |
| 124 }; | |
| 125 | |
| 126 | |
| 2294 | 127 static ngx_http_module_t ngx_http_limit_req_module_ctx = { |
| 980 | 128 NULL, /* preconfiguration */ |
| 2294 | 129 ngx_http_limit_req_init, /* postconfiguration */ |
| 980 | 130 |
| 131 NULL, /* create main configuration */ | |
| 132 NULL, /* init main configuration */ | |
| 133 | |
| 134 NULL, /* create server configuration */ | |
| 135 NULL, /* merge server configuration */ | |
| 136 | |
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137 ngx_http_limit_req_create_conf, /* create location configuration */ |
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138 ngx_http_limit_req_merge_conf /* merge location configuration */ |
| 980 | 139 }; |
| 140 | |
| 141 | |
| 2294 | 142 ngx_module_t ngx_http_limit_req_module = { |
| 980 | 143 NGX_MODULE_V1, |
| 2294 | 144 &ngx_http_limit_req_module_ctx, /* module context */ |
| 145 ngx_http_limit_req_commands, /* module directives */ | |
| 980 | 146 NGX_HTTP_MODULE, /* module type */ |
| 147 NULL, /* init master */ | |
| 148 NULL, /* init module */ | |
| 149 NULL, /* init process */ | |
| 150 NULL, /* init thread */ | |
| 151 NULL, /* exit thread */ | |
| 152 NULL, /* exit process */ | |
| 153 NULL, /* exit master */ | |
| 154 NGX_MODULE_V1_PADDING | |
| 155 }; | |
| 156 | |
| 157 | |
| 158 static ngx_int_t | |
| 2294 | 159 ngx_http_limit_req_handler(ngx_http_request_t *r) |
| 980 | 160 { |
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161 size_t len; |
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162 uint32_t hash; |
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163 ngx_int_t rc; |
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164 ngx_uint_t n, excess; |
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165 ngx_msec_t delay; |
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166 ngx_http_variable_value_t *vv; |
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167 ngx_http_limit_req_ctx_t *ctx; |
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168 ngx_http_limit_req_conf_t *lrcf; |
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169 ngx_http_limit_req_limit_t *limit, *limits; |
| 980 | 170 |
| 2294 | 171 if (r->main->limit_req_set) { |
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172 return NGX_DECLINED; |
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173 } |
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174 |
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175 lrcf = ngx_http_get_module_loc_conf(r, ngx_http_limit_req_module); |
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176 limits = lrcf->limits.elts; |
| 980 | 177 |
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178 excess = 0; |
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179 |
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180 rc = NGX_DECLINED; |
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181 |
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182 #if (NGX_SUPPRESS_WARN) |
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183 limit = NULL; |
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184 #endif |
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185 |
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186 for (n = 0; n < lrcf->limits.nelts; n++) { |
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187 |
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188 limit = &limits[n]; |
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189 |
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190 ctx = limit->shm_zone->data; |
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191 |
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192 vv = ngx_http_get_indexed_variable(r, ctx->index); |
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193 |
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194 if (vv == NULL || vv->not_found) { |
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195 continue; |
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196 } |
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197 |
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198 len = vv->len; |
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199 |
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200 if (len == 0) { |
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201 continue; |
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202 } |
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203 |
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204 if (len > 65535) { |
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205 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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206 "the value of the \"%V\" variable " |
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207 "is more than 65535 bytes: \"%v\"", |
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208 &ctx->var, vv); |
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209 continue; |
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210 } |
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211 |
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212 hash = ngx_crc32_short(vv->data, len); |
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213 |
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214 ngx_shmtx_lock(&ctx->shpool->mutex); |
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215 |
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216 rc = ngx_http_limit_req_lookup(limit, hash, vv->data, len, &excess, |
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217 (n == lrcf->limits.nelts - 1)); |
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218 |
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219 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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220 |
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221 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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222 "limit_req[%ui]: %i %ui.%03ui", |
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223 n, rc, excess / 1000, excess % 1000); |
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224 |
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225 if (rc != NGX_AGAIN) { |
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226 break; |
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227 } |
| 980 | 228 } |
| 229 | |
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230 if (rc == NGX_DECLINED) { |
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231 return NGX_DECLINED; |
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232 } |
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233 |
| 2294 | 234 r->main->limit_req_set = 1; |
| 980 | 235 |
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236 if (rc == NGX_BUSY || rc == NGX_ERROR) { |
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237 |
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238 if (rc == NGX_BUSY) { |
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239 ngx_log_error(lrcf->limit_log_level, r->connection->log, 0, |
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240 "limiting requests, excess: %ui.%03ui by zone \"%V\"", |
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241 excess / 1000, excess % 1000, |
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242 &limit->shm_zone->shm.name); |
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243 } |
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244 |
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245 while (n--) { |
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246 ctx = limits[n].shm_zone->data; |
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247 |
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248 if (ctx->node == NULL) { |
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249 continue; |
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250 } |
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251 |
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252 ngx_shmtx_lock(&ctx->shpool->mutex); |
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253 |
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254 ctx->node->count--; |
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255 |
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256 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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257 |
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258 ctx->node = NULL; |
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259 } |
| 980 | 260 |
|
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261 return lrcf->status_code; |
| 980 | 262 } |
| 263 | |
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264 /* rc == NGX_AGAIN || rc == NGX_OK */ |
|
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265 |
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266 if (rc == NGX_AGAIN) { |
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267 excess = 0; |
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268 } |
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269 |
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270 delay = ngx_http_limit_req_account(limits, n, &excess, &limit); |
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271 |
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272 if (!delay) { |
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273 return NGX_DECLINED; |
| 2294 | 274 } |
| 275 | |
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276 ngx_log_error(lrcf->delay_log_level, r->connection->log, 0, |
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277 "delaying request, excess: %ui.%03ui, by zone \"%V\"", |
|
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278 excess / 1000, excess % 1000, &limit->shm_zone->shm.name); |
| 2294 | 279 |
|
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280 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
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281 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 2294 | 282 } |
| 283 | |
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284 r->read_event_handler = ngx_http_test_reading; |
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285 r->write_event_handler = ngx_http_limit_req_delay; |
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286 ngx_add_timer(r->connection->write, delay); |
| 2294 | 287 |
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288 return NGX_AGAIN; |
| 980 | 289 } |
| 290 | |
| 291 | |
| 292 static void | |
| 2294 | 293 ngx_http_limit_req_delay(ngx_http_request_t *r) |
| 294 { | |
|
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295 ngx_event_t *wev; |
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296 |
| 2294 | 297 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| 2973 | 298 "limit_req delay"); |
| 2294 | 299 |
|
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300 wev = r->connection->write; |
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301 |
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302 if (!wev->timedout) { |
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303 |
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304 if (ngx_handle_write_event(wev, 0) != NGX_OK) { |
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305 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
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306 } |
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307 |
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308 return; |
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309 } |
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310 |
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311 wev->timedout = 0; |
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312 |
| 2294 | 313 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
| 314 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); | |
| 315 return; | |
| 316 } | |
| 317 | |
| 318 r->read_event_handler = ngx_http_block_reading; | |
| 319 r->write_event_handler = ngx_http_core_run_phases; | |
| 320 | |
| 321 ngx_http_core_run_phases(r); | |
| 322 } | |
| 323 | |
| 324 | |
| 325 static void | |
| 326 ngx_http_limit_req_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
|
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327 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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328 { |
| 2294 | 329 ngx_rbtree_node_t **p; |
|
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330 ngx_http_limit_req_node_t *lrn, *lrnt; |
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331 |
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332 for ( ;; ) { |
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333 |
|
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334 if (node->key < temp->key) { |
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335 |
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336 p = &temp->left; |
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337 |
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338 } else if (node->key > temp->key) { |
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339 |
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340 p = &temp->right; |
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341 |
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342 } else { /* node->key == temp->key */ |
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343 |
|
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344 lrn = (ngx_http_limit_req_node_t *) &node->color; |
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345 lrnt = (ngx_http_limit_req_node_t *) &temp->color; |
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346 |
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347 p = (ngx_memn2cmp(lrn->data, lrnt->data, lrn->len, lrnt->len) < 0) |
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348 ? &temp->left : &temp->right; |
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349 } |
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350 |
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351 if (*p == sentinel) { |
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352 break; |
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353 } |
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354 |
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355 temp = *p; |
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356 } |
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357 |
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358 *p = node; |
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359 node->parent = temp; |
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360 node->left = sentinel; |
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361 node->right = sentinel; |
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362 ngx_rbt_red(node); |
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363 } |
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364 |
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365 |
| 2294 | 366 static ngx_int_t |
|
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367 ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit, ngx_uint_t hash, |
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368 u_char *data, size_t len, ngx_uint_t *ep, ngx_uint_t account) |
| 980 | 369 { |
|
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370 size_t size; |
| 2313 | 371 ngx_int_t rc, excess; |
| 2294 | 372 ngx_time_t *tp; |
| 373 ngx_msec_t now; | |
| 374 ngx_msec_int_t ms; | |
| 375 ngx_rbtree_node_t *node, *sentinel; | |
| 376 ngx_http_limit_req_ctx_t *ctx; | |
|
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377 ngx_http_limit_req_node_t *lr; |
| 2294 | 378 |
|
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379 tp = ngx_timeofday(); |
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380 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
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381 |
|
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|
382 ctx = limit->shm_zone->data; |
| 2294 | 383 |
|
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384 node = ctx->sh->rbtree.root; |
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|
385 sentinel = ctx->sh->rbtree.sentinel; |
| 980 | 386 |
| 2294 | 387 while (node != sentinel) { |
| 388 | |
| 389 if (hash < node->key) { | |
| 390 node = node->left; | |
| 391 continue; | |
| 392 } | |
| 393 | |
| 394 if (hash > node->key) { | |
| 395 node = node->right; | |
| 396 continue; | |
| 397 } | |
| 398 | |
| 399 /* hash == node->key */ | |
| 400 | |
|
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|
401 lr = (ngx_http_limit_req_node_t *) &node->color; |
| 2294 | 402 |
|
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|
403 rc = ngx_memn2cmp(data, lr->data, len, (size_t) lr->len); |
| 3191 | 404 |
|
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|
405 if (rc == 0) { |
|
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|
406 ngx_queue_remove(&lr->queue); |
|
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|
407 ngx_queue_insert_head(&ctx->sh->queue, &lr->queue); |
|
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|
408 |
|
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409 ms = (ngx_msec_int_t) (now - lr->last); |
| 980 | 410 |
|
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|
411 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
|
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|
412 |
|
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|
413 if (excess < 0) { |
|
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|
414 excess = 0; |
| 2294 | 415 } |
| 416 | |
|
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|
417 *ep = excess; |
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|
418 |
|
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|
419 if ((ngx_uint_t) excess > limit->burst) { |
|
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|
420 return NGX_BUSY; |
|
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|
421 } |
| 2294 | 422 |
|
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|
423 if (account) { |
|
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|
424 lr->excess = excess; |
|
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|
425 lr->last = now; |
|
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|
426 return NGX_OK; |
|
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|
427 } |
| 2294 | 428 |
|
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|
429 lr->count++; |
|
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|
430 |
|
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|
431 ctx->node = lr; |
|
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|
432 |
|
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|
433 return NGX_AGAIN; |
|
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|
434 } |
|
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|
435 |
|
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|
436 node = (rc < 0) ? node->left : node->right; |
| 980 | 437 } |
| 438 | |
|
3779
57aecfdcac3d
an excess was logged as 0.000 if requests were limited without delay:
Igor Sysoev <igor@sysoev.ru>
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3525
diff
changeset
|
439 *ep = 0; |
| 2294 | 440 |
|
4418
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4417
diff
changeset
|
441 size = offsetof(ngx_rbtree_node_t, color) |
|
aac79fc948cc
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changeset
|
442 + offsetof(ngx_http_limit_req_node_t, data) |
|
aac79fc948cc
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changeset
|
443 + len; |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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diff
changeset
|
444 |
|
4419
7084faa7a4b4
Limit req: number of cleanup calls reduced.
Valentin Bartenev <vbart@nginx.com>
parents:
4418
diff
changeset
|
445 ngx_http_limit_req_expire(ctx, 1); |
|
7084faa7a4b4
Limit req: number of cleanup calls reduced.
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parents:
4418
diff
changeset
|
446 |
|
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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diff
changeset
|
447 node = ngx_slab_alloc_locked(ctx->shpool, size); |
|
aac79fc948cc
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diff
changeset
|
448 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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changeset
|
449 if (node == NULL) { |
|
aac79fc948cc
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diff
changeset
|
450 ngx_http_limit_req_expire(ctx, 0); |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
451 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
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4417
diff
changeset
|
452 node = ngx_slab_alloc_locked(ctx->shpool, size); |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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diff
changeset
|
453 if (node == NULL) { |
|
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
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5411
diff
changeset
|
454 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
|
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5411
diff
changeset
|
455 "could not allocate node%s", ctx->shpool->log_ctx); |
|
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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4417
diff
changeset
|
456 return NGX_ERROR; |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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4417
diff
changeset
|
457 } |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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4417
diff
changeset
|
458 } |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
459 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
460 node->key = hash; |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
461 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
462 lr = (ngx_http_limit_req_node_t *) &node->color; |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
463 |
|
5846
cda4fcb9294c
Limit req: don't truncate key value to 255 bytes.
Valentin Bartenev <vbart@nginx.com>
parents:
5634
diff
changeset
|
464 lr->len = (u_short) len; |
|
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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parents:
4417
diff
changeset
|
465 lr->excess = 0; |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
466 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
467 ngx_memcpy(lr->data, data, len); |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
468 |
|
4832
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
469 ngx_rbtree_insert(&ctx->sh->rbtree, node); |
|
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
470 |
|
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
471 ngx_queue_insert_head(&ctx->sh->queue, &lr->queue); |
|
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
472 |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
473 if (account) { |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
474 lr->last = now; |
|
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Limit req: support for multiple "limit_req" limits.
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475 lr->count = 0; |
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476 return NGX_OK; |
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477 } |
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478 |
|
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479 lr->last = 0; |
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480 lr->count = 1; |
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481 |
|
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482 ctx->node = lr; |
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483 |
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484 return NGX_AGAIN; |
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485 } |
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486 |
|
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487 |
|
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488 static ngx_msec_t |
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489 ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, ngx_uint_t n, |
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490 ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit) |
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491 { |
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492 ngx_int_t excess; |
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493 ngx_time_t *tp; |
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494 ngx_msec_t now, delay, max_delay; |
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495 ngx_msec_int_t ms; |
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496 ngx_http_limit_req_ctx_t *ctx; |
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497 ngx_http_limit_req_node_t *lr; |
|
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498 |
|
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499 excess = *ep; |
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500 |
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501 if (excess == 0 || (*limit)->nodelay) { |
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502 max_delay = 0; |
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503 |
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504 } else { |
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505 ctx = (*limit)->shm_zone->data; |
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506 max_delay = excess * 1000 / ctx->rate; |
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507 } |
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508 |
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509 while (n--) { |
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510 ctx = limits[n].shm_zone->data; |
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511 lr = ctx->node; |
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512 |
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513 if (lr == NULL) { |
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514 continue; |
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515 } |
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516 |
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517 ngx_shmtx_lock(&ctx->shpool->mutex); |
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518 |
|
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519 tp = ngx_timeofday(); |
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520 |
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521 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
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522 ms = (ngx_msec_int_t) (now - lr->last); |
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523 |
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524 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
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525 |
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526 if (excess < 0) { |
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527 excess = 0; |
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528 } |
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529 |
|
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530 lr->last = now; |
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531 lr->excess = excess; |
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532 lr->count--; |
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533 |
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534 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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|
535 |
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536 ctx->node = NULL; |
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|
537 |
|
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538 if (limits[n].nodelay) { |
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539 continue; |
|
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540 } |
|
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|
541 |
|
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542 delay = excess * 1000 / ctx->rate; |
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|
543 |
|
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|
544 if (delay > max_delay) { |
|
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545 max_delay = delay; |
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546 *ep = excess; |
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547 *limit = &limits[n]; |
|
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|
548 } |
|
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|
549 } |
|
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|
550 |
|
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|
551 return max_delay; |
| 2294 | 552 } |
| 553 | |
| 554 | |
| 555 static void | |
| 556 ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, ngx_uint_t n) | |
| 557 { | |
| 2313 | 558 ngx_int_t excess; |
| 2294 | 559 ngx_time_t *tp; |
| 560 ngx_msec_t now; | |
| 561 ngx_queue_t *q; | |
| 562 ngx_msec_int_t ms; | |
| 563 ngx_rbtree_node_t *node; | |
|
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|
564 ngx_http_limit_req_node_t *lr; |
| 2294 | 565 |
| 566 tp = ngx_timeofday(); | |
| 567 | |
| 568 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); | |
| 569 | |
| 570 /* | |
| 571 * n == 1 deletes one or two zero rate entries | |
| 572 * n == 0 deletes oldest entry by force | |
| 573 * and one or two zero rate entries | |
| 574 */ | |
| 575 | |
| 576 while (n < 3) { | |
| 577 | |
|
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578 if (ngx_queue_empty(&ctx->sh->queue)) { |
| 2294 | 579 return; |
| 580 } | |
| 581 | |
|
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582 q = ngx_queue_last(&ctx->sh->queue); |
| 2294 | 583 |
|
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|
584 lr = ngx_queue_data(q, ngx_http_limit_req_node_t, queue); |
| 2294 | 585 |
|
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|
586 if (lr->count) { |
|
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|
587 |
|
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|
588 /* |
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|
589 * There is not much sense in looking further, |
|
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|
590 * because we bump nodes on the lookup stage. |
|
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591 */ |
|
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|
592 |
|
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593 return; |
|
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|
594 } |
|
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|
595 |
| 2294 | 596 if (n++ != 0) { |
| 597 | |
|
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598 ms = (ngx_msec_int_t) (now - lr->last); |
| 2294 | 599 ms = ngx_abs(ms); |
| 600 | |
| 601 if (ms < 60000) { | |
| 602 return; | |
| 603 } | |
| 604 | |
|
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|
605 excess = lr->excess - ctx->rate * ms / 1000; |
| 2294 | 606 |
| 2313 | 607 if (excess > 0) { |
| 2294 | 608 return; |
| 609 } | |
| 610 } | |
| 611 | |
| 612 ngx_queue_remove(q); | |
| 613 | |
| 614 node = (ngx_rbtree_node_t *) | |
|
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615 ((u_char *) lr - offsetof(ngx_rbtree_node_t, color)); |
| 2294 | 616 |
|
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617 ngx_rbtree_delete(&ctx->sh->rbtree, node); |
| 2294 | 618 |
| 619 ngx_slab_free_locked(ctx->shpool, node); | |
| 620 } | |
| 980 | 621 } |
| 622 | |
| 623 | |
| 624 static ngx_int_t | |
| 2294 | 625 ngx_http_limit_req_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
| 980 | 626 { |
| 2294 | 627 ngx_http_limit_req_ctx_t *octx = data; |
|
993
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diff
changeset
|
628 |
|
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
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2376
diff
changeset
|
629 size_t len; |
| 2294 | 630 ngx_http_limit_req_ctx_t *ctx; |
| 980 | 631 |
|
993
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|
632 ctx = shm_zone->data; |
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|
633 |
|
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|
634 if (octx) { |
|
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changeset
|
635 if (ngx_strcmp(ctx->var.data, octx->var.data) != 0) { |
|
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636 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
| 2294 | 637 "limit_req \"%V\" uses the \"%V\" variable " |
|
993
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638 "while previously it used the \"%V\" variable", |
|
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639 &shm_zone->shm.name, &ctx->var, &octx->var); |
|
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640 return NGX_ERROR; |
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|
641 } |
|
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|
642 |
|
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|
643 ctx->sh = octx->sh; |
| 2294 | 644 ctx->shpool = octx->shpool; |
|
993
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645 |
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646 return NGX_OK; |
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647 } |
|
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|
648 |
| 2294 | 649 ctx->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
| 980 | 650 |
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651 if (shm_zone->shm.exists) { |
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652 ctx->sh = ctx->shpool->data; |
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653 |
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654 return NGX_OK; |
| 980 | 655 } |
| 656 | |
|
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657 ctx->sh = ngx_slab_alloc(ctx->shpool, sizeof(ngx_http_limit_req_shctx_t)); |
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658 if (ctx->sh == NULL) { |
| 980 | 659 return NGX_ERROR; |
| 660 } | |
| 661 | |
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662 ctx->shpool->data = ctx->sh; |
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663 |
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|
664 ngx_rbtree_init(&ctx->sh->rbtree, &ctx->sh->sentinel, |
| 2294 | 665 ngx_http_limit_req_rbtree_insert_value); |
| 666 | |
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667 ngx_queue_init(&ctx->sh->queue); |
| 980 | 668 |
|
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Igor Sysoev <igor@sysoev.ru>
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|
669 len = sizeof(" in limit_req zone \"\"") + shm_zone->shm.name.len; |
|
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670 |
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671 ctx->shpool->log_ctx = ngx_slab_alloc(ctx->shpool, len); |
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672 if (ctx->shpool->log_ctx == NULL) { |
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673 return NGX_ERROR; |
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674 } |
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675 |
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676 ngx_sprintf(ctx->shpool->log_ctx, " in limit_req zone \"%V\"%Z", |
|
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677 &shm_zone->shm.name); |
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|
678 |
|
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
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|
679 ctx->shpool->log_nomem = 0; |
|
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Core: slab log_nomem flag.
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|
680 |
| 980 | 681 return NGX_OK; |
| 682 } | |
| 683 | |
| 684 | |
| 685 static void * | |
| 2294 | 686 ngx_http_limit_req_create_conf(ngx_conf_t *cf) |
| 980 | 687 { |
| 2294 | 688 ngx_http_limit_req_conf_t *conf; |
| 980 | 689 |
| 2294 | 690 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_conf_t)); |
| 980 | 691 if (conf == NULL) { |
|
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|
692 return NULL; |
| 980 | 693 } |
| 694 | |
| 695 /* | |
| 696 * set by ngx_pcalloc(): | |
| 697 * | |
|
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|
698 * conf->limits.elts = NULL; |
| 980 | 699 */ |
| 700 | |
| 3185 | 701 conf->limit_log_level = NGX_CONF_UNSET_UINT; |
|
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The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
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|
702 conf->status_code = NGX_CONF_UNSET_UINT; |
| 3185 | 703 |
| 980 | 704 return conf; |
| 705 } | |
| 706 | |
| 707 | |
| 708 static char * | |
| 2294 | 709 ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
| 980 | 710 { |
| 2294 | 711 ngx_http_limit_req_conf_t *prev = parent; |
| 712 ngx_http_limit_req_conf_t *conf = child; | |
| 980 | 713 |
|
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|
714 if (conf->limits.elts == NULL) { |
|
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Limit req: support for multiple "limit_req" limits.
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changeset
|
715 conf->limits = prev->limits; |
| 980 | 716 } |
| 717 | |
| 3185 | 718 ngx_conf_merge_uint_value(conf->limit_log_level, prev->limit_log_level, |
| 719 NGX_LOG_ERR); | |
| 720 | |
| 721 conf->delay_log_level = (conf->limit_log_level == NGX_LOG_INFO) ? | |
| 722 NGX_LOG_INFO : conf->limit_log_level + 1; | |
| 723 | |
|
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The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
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|
724 ngx_conf_merge_uint_value(conf->status_code, prev->status_code, |
|
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|
725 NGX_HTTP_SERVICE_UNAVAILABLE); |
|
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diff
changeset
|
726 |
| 980 | 727 return NGX_CONF_OK; |
| 728 } | |
| 729 | |
| 730 | |
| 731 static char * | |
| 2294 | 732 ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| 980 | 733 { |
| 2294 | 734 u_char *p; |
|
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Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
735 size_t len; |
|
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Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
736 ssize_t size; |
| 2294 | 737 ngx_str_t *value, name, s; |
| 738 ngx_int_t rate, scale; | |
| 739 ngx_uint_t i; | |
| 740 ngx_shm_zone_t *shm_zone; | |
| 741 ngx_http_limit_req_ctx_t *ctx; | |
| 980 | 742 |
| 743 value = cf->args->elts; | |
| 744 | |
| 2294 | 745 ctx = NULL; |
| 746 size = 0; | |
| 747 rate = 1; | |
| 748 scale = 1; | |
| 749 name.len = 0; | |
| 750 | |
| 751 for (i = 1; i < cf->args->nelts; i++) { | |
| 752 | |
| 753 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
| 754 | |
| 755 name.data = value[i].data + 5; | |
| 756 | |
| 757 p = (u_char *) ngx_strchr(name.data, ':'); | |
| 758 | |
|
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parents:
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|
759 if (p == NULL) { |
|
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Limit req: improved error handling when parsing "zone" parameter of
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parents:
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diff
changeset
|
760 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
761 "invalid zone size \"%V\"", &value[i]); |
|
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Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
762 return NGX_CONF_ERROR; |
| 2294 | 763 } |
| 764 | |
|
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Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
diff
changeset
|
765 name.len = p - name.data; |
|
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Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
766 |
|
9e9d2e06f933
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parents:
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diff
changeset
|
767 s.data = p + 1; |
|
9e9d2e06f933
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parents:
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diff
changeset
|
768 s.len = value[i].data + value[i].len - s.data; |
|
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Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
769 |
|
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Limit req: improved error handling when parsing "zone" parameter of
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parents:
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diff
changeset
|
770 size = ngx_parse_size(&s); |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
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diff
changeset
|
771 |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
diff
changeset
|
772 if (size == NGX_ERROR) { |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
773 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
774 "invalid zone size \"%V\"", &value[i]); |
|
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Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
775 return NGX_CONF_ERROR; |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
776 } |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
777 |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
778 if (size < (ssize_t) (8 * ngx_pagesize)) { |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
779 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
780 "zone \"%V\" is too small", &value[i]); |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
diff
changeset
|
781 return NGX_CONF_ERROR; |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
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diff
changeset
|
782 } |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
783 |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
784 continue; |
| 2294 | 785 } |
| 786 | |
| 787 if (ngx_strncmp(value[i].data, "rate=", 5) == 0) { | |
| 788 | |
| 789 len = value[i].len; | |
| 790 p = value[i].data + len - 3; | |
| 987 | 791 |
| 2294 | 792 if (ngx_strncmp(p, "r/s", 3) == 0) { |
| 793 scale = 1; | |
| 794 len -= 3; | |
| 795 | |
| 796 } else if (ngx_strncmp(p, "r/m", 3) == 0) { | |
| 797 scale = 60; | |
| 798 len -= 3; | |
| 799 } | |
| 800 | |
| 801 rate = ngx_atoi(value[i].data + 5, len - 5); | |
|
5166
fc595eeb6c54
Limit req: rate should be non-zero.
Valentin Bartenev <vbart@nginx.com>
parents:
5117
diff
changeset
|
802 if (rate <= 0) { |
| 2294 | 803 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 804 "invalid rate \"%V\"", &value[i]); | |
| 805 return NGX_CONF_ERROR; | |
| 806 } | |
| 807 | |
| 808 continue; | |
| 809 } | |
| 810 | |
| 811 if (value[i].data[0] == '$') { | |
| 987 | 812 |
| 2294 | 813 value[i].len--; |
| 814 value[i].data++; | |
| 815 | |
| 816 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_ctx_t)); | |
| 817 if (ctx == NULL) { | |
| 818 return NGX_CONF_ERROR; | |
| 819 } | |
| 820 | |
| 821 ctx->index = ngx_http_get_variable_index(cf, &value[i]); | |
| 822 if (ctx->index == NGX_ERROR) { | |
| 823 return NGX_CONF_ERROR; | |
| 824 } | |
| 825 | |
| 826 ctx->var = value[i]; | |
| 827 | |
| 828 continue; | |
| 829 } | |
| 830 | |
| 831 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 832 "invalid parameter \"%V\"", &value[i]); | |
| 987 | 833 return NGX_CONF_ERROR; |
| 834 } | |
| 835 | |
|
4417
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
836 if (name.len == 0) { |
| 2294 | 837 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 838 "\"%V\" must have \"zone\" parameter", | |
| 839 &cmd->name); | |
| 987 | 840 return NGX_CONF_ERROR; |
| 841 } | |
| 842 | |
| 2294 | 843 if (ctx == NULL) { |
| 980 | 844 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
4416
8156a9bfc044
Limit req: error messages fixed.
Valentin Bartenev <vbart@nginx.com>
parents:
4412
diff
changeset
|
845 "no variable is defined for %V \"%V\"", |
|
8156a9bfc044
Limit req: error messages fixed.
Valentin Bartenev <vbart@nginx.com>
parents:
4412
diff
changeset
|
846 &cmd->name, &name); |
| 980 | 847 return NGX_CONF_ERROR; |
| 848 } | |
| 849 | |
| 2313 | 850 ctx->rate = rate * 1000 / scale; |
| 980 | 851 |
| 2294 | 852 shm_zone = ngx_shared_memory_add(cf, &name, size, |
| 853 &ngx_http_limit_req_module); | |
| 980 | 854 if (shm_zone == NULL) { |
| 855 return NGX_CONF_ERROR; | |
| 856 } | |
| 857 | |
| 987 | 858 if (shm_zone->data) { |
| 859 ctx = shm_zone->data; | |
| 860 | |
| 861 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
|
4416
8156a9bfc044
Limit req: error messages fixed.
Valentin Bartenev <vbart@nginx.com>
parents:
4412
diff
changeset
|
862 "%V \"%V\" is already bound to variable \"%V\"", |
|
8156a9bfc044
Limit req: error messages fixed.
Valentin Bartenev <vbart@nginx.com>
parents:
4412
diff
changeset
|
863 &cmd->name, &name, &ctx->var); |
| 987 | 864 return NGX_CONF_ERROR; |
| 865 } | |
| 866 | |
| 2294 | 867 shm_zone->init = ngx_http_limit_req_init_zone; |
| 987 | 868 shm_zone->data = ctx; |
| 980 | 869 |
| 870 return NGX_CONF_OK; | |
| 871 } | |
| 872 | |
| 873 | |
| 874 static char * | |
| 2294 | 875 ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| 980 | 876 { |
|
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
877 ngx_http_limit_req_conf_t *lrcf = conf; |
| 980 | 878 |
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879 ngx_int_t burst; |
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880 ngx_str_t *value, s; |
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881 ngx_uint_t i, nodelay; |
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882 ngx_shm_zone_t *shm_zone; |
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883 ngx_http_limit_req_limit_t *limit, *limits; |
| 980 | 884 |
| 885 value = cf->args->elts; | |
| 886 | |
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887 shm_zone = NULL; |
| 2294 | 888 burst = 0; |
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889 nodelay = 0; |
| 2294 | 890 |
| 891 for (i = 1; i < cf->args->nelts; i++) { | |
| 892 | |
| 893 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
| 894 | |
| 895 s.len = value[i].len - 5; | |
| 896 s.data = value[i].data + 5; | |
| 897 | |
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898 shm_zone = ngx_shared_memory_add(cf, &s, 0, |
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899 &ngx_http_limit_req_module); |
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900 if (shm_zone == NULL) { |
| 2294 | 901 return NGX_CONF_ERROR; |
| 902 } | |
| 903 | |
| 904 continue; | |
| 905 } | |
| 906 | |
| 907 if (ngx_strncmp(value[i].data, "burst=", 6) == 0) { | |
| 908 | |
|
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909 burst = ngx_atoi(value[i].data + 6, value[i].len - 6); |
| 2294 | 910 if (burst <= 0) { |
| 911 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 912 "invalid burst rate \"%V\"", &value[i]); | |
| 913 return NGX_CONF_ERROR; | |
| 914 } | |
| 915 | |
| 916 continue; | |
| 917 } | |
| 918 | |
|
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919 if (ngx_strcmp(value[i].data, "nodelay") == 0) { |
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920 nodelay = 1; |
| 2294 | 921 continue; |
| 922 } | |
| 923 | |
| 924 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 925 "invalid parameter \"%V\"", &value[i]); | |
| 980 | 926 return NGX_CONF_ERROR; |
| 927 } | |
| 928 | |
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929 if (shm_zone == NULL) { |
| 980 | 930 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 2294 | 931 "\"%V\" must have \"zone\" parameter", |
| 932 &cmd->name); | |
| 980 | 933 return NGX_CONF_ERROR; |
| 934 } | |
| 935 | |
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936 if (shm_zone->data == NULL) { |
|
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937 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 2294 | 938 "unknown limit_req_zone \"%V\"", |
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939 &shm_zone->shm.name); |
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940 return NGX_CONF_ERROR; |
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941 } |
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942 |
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943 limits = lrcf->limits.elts; |
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944 |
|
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945 if (limits == NULL) { |
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946 if (ngx_array_init(&lrcf->limits, cf->pool, 1, |
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947 sizeof(ngx_http_limit_req_limit_t)) |
|
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948 != NGX_OK) |
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949 { |
|
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950 return NGX_CONF_ERROR; |
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951 } |
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|
952 } |
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|
953 |
|
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954 for (i = 0; i < lrcf->limits.nelts; i++) { |
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955 if (shm_zone == limits[i].shm_zone) { |
|
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956 return "is duplicate"; |
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957 } |
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958 } |
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959 |
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960 limit = ngx_array_push(&lrcf->limits); |
|
4811
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diff
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|
961 if (limit == NULL) { |
|
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diff
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|
962 return NGX_CONF_ERROR; |
|
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changeset
|
963 } |
|
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|
964 |
|
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|
965 limit->shm_zone = shm_zone; |
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|
966 limit->burst = burst * 1000; |
|
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967 limit->nodelay = nodelay; |
| 980 | 968 |
| 969 return NGX_CONF_OK; | |
| 970 } | |
| 971 | |
| 972 | |
| 973 static ngx_int_t | |
| 2294 | 974 ngx_http_limit_req_init(ngx_conf_t *cf) |
| 980 | 975 { |
| 976 ngx_http_handler_pt *h; | |
| 977 ngx_http_core_main_conf_t *cmcf; | |
| 978 | |
| 979 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
| 980 | |
| 981 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
| 982 if (h == NULL) { | |
| 983 return NGX_ERROR; | |
| 984 } | |
| 985 | |
| 2294 | 986 *h = ngx_http_limit_req_handler; |
| 980 | 987 |
| 988 return NGX_OK; | |
| 989 } |