Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_limit_req_module.c @ 5104:93713d4b99c3
Removed c->single_connection flag.
The c->single_connection was intended to be used as lock mechanism
to serialize modifications of request object from several threads
working with client and upstream connections. The flag is redundant
since threads in nginx have never been used that way.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Thu, 07 Mar 2013 18:07:16 +0000 |
parents | 949ea3d3cd1a |
children | 00e4459739ed |
rev | line source |
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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; | |
2294 | 56 } ngx_http_limit_req_conf_t; |
980 | 57 |
58 | |
2294 | 59 static void ngx_http_limit_req_delay(ngx_http_request_t *r); |
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60 static ngx_int_t ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit, |
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61 ngx_uint_t hash, u_char *data, size_t len, ngx_uint_t *ep, |
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62 ngx_uint_t account); |
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63 static ngx_msec_t ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, |
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64 ngx_uint_t n, ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit); |
2294 | 65 static void ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, |
66 ngx_uint_t n); | |
980 | 67 |
2294 | 68 static void *ngx_http_limit_req_create_conf(ngx_conf_t *cf); |
69 static char *ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, | |
980 | 70 void *child); |
2294 | 71 static char *ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
980 | 72 void *conf); |
2294 | 73 static char *ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, |
980 | 74 void *conf); |
2294 | 75 static ngx_int_t ngx_http_limit_req_init(ngx_conf_t *cf); |
980 | 76 |
77 | |
3185 | 78 static ngx_conf_enum_t ngx_http_limit_req_log_levels[] = { |
79 { ngx_string("info"), NGX_LOG_INFO }, | |
80 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
81 { ngx_string("warn"), NGX_LOG_WARN }, | |
82 { ngx_string("error"), NGX_LOG_ERR }, | |
83 { ngx_null_string, 0 } | |
84 }; | |
85 | |
86 | |
2294 | 87 static ngx_command_t ngx_http_limit_req_commands[] = { |
980 | 88 |
2294 | 89 { ngx_string("limit_req_zone"), |
987 | 90 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3, |
2294 | 91 ngx_http_limit_req_zone, |
980 | 92 0, |
93 0, | |
94 NULL }, | |
95 | |
2294 | 96 { ngx_string("limit_req"), |
97 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123, | |
98 ngx_http_limit_req, | |
980 | 99 NGX_HTTP_LOC_CONF_OFFSET, |
100 0, | |
101 NULL }, | |
102 | |
3185 | 103 { ngx_string("limit_req_log_level"), |
104 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
105 ngx_conf_set_enum_slot, | |
106 NGX_HTTP_LOC_CONF_OFFSET, | |
107 offsetof(ngx_http_limit_req_conf_t, limit_log_level), | |
108 &ngx_http_limit_req_log_levels }, | |
109 | |
980 | 110 ngx_null_command |
111 }; | |
112 | |
113 | |
2294 | 114 static ngx_http_module_t ngx_http_limit_req_module_ctx = { |
980 | 115 NULL, /* preconfiguration */ |
2294 | 116 ngx_http_limit_req_init, /* postconfiguration */ |
980 | 117 |
118 NULL, /* create main configuration */ | |
119 NULL, /* init main configuration */ | |
120 | |
121 NULL, /* create server configuration */ | |
122 NULL, /* merge server configuration */ | |
123 | |
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124 ngx_http_limit_req_create_conf, /* create location configuration */ |
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125 ngx_http_limit_req_merge_conf /* merge location configuration */ |
980 | 126 }; |
127 | |
128 | |
2294 | 129 ngx_module_t ngx_http_limit_req_module = { |
980 | 130 NGX_MODULE_V1, |
2294 | 131 &ngx_http_limit_req_module_ctx, /* module context */ |
132 ngx_http_limit_req_commands, /* module directives */ | |
980 | 133 NGX_HTTP_MODULE, /* module type */ |
134 NULL, /* init master */ | |
135 NULL, /* init module */ | |
136 NULL, /* init process */ | |
137 NULL, /* init thread */ | |
138 NULL, /* exit thread */ | |
139 NULL, /* exit process */ | |
140 NULL, /* exit master */ | |
141 NGX_MODULE_V1_PADDING | |
142 }; | |
143 | |
144 | |
145 static ngx_int_t | |
2294 | 146 ngx_http_limit_req_handler(ngx_http_request_t *r) |
980 | 147 { |
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148 size_t len; |
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149 uint32_t hash; |
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150 ngx_int_t rc; |
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151 ngx_uint_t n, excess; |
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152 ngx_msec_t delay; |
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153 ngx_http_variable_value_t *vv; |
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154 ngx_http_limit_req_ctx_t *ctx; |
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155 ngx_http_limit_req_conf_t *lrcf; |
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156 ngx_http_limit_req_limit_t *limit, *limits; |
980 | 157 |
2294 | 158 if (r->main->limit_req_set) { |
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159 return NGX_DECLINED; |
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160 } |
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161 |
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162 lrcf = ngx_http_get_module_loc_conf(r, ngx_http_limit_req_module); |
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163 limits = lrcf->limits.elts; |
980 | 164 |
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165 excess = 0; |
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166 |
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167 rc = NGX_DECLINED; |
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168 |
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169 #if (NGX_SUPPRESS_WARN) |
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170 limit = NULL; |
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171 #endif |
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172 |
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173 for (n = 0; n < lrcf->limits.nelts; n++) { |
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174 |
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175 limit = &limits[n]; |
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176 |
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177 ctx = limit->shm_zone->data; |
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178 |
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179 vv = ngx_http_get_indexed_variable(r, ctx->index); |
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180 |
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181 if (vv == NULL || vv->not_found) { |
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182 continue; |
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183 } |
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184 |
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185 len = vv->len; |
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186 |
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187 if (len == 0) { |
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188 continue; |
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189 } |
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190 |
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191 if (len > 65535) { |
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192 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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193 "the value of the \"%V\" variable " |
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194 "is more than 65535 bytes: \"%v\"", |
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195 &ctx->var, vv); |
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196 continue; |
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197 } |
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198 |
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199 hash = ngx_crc32_short(vv->data, len); |
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200 |
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201 ngx_shmtx_lock(&ctx->shpool->mutex); |
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202 |
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203 rc = ngx_http_limit_req_lookup(limit, hash, vv->data, len, &excess, |
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204 (n == lrcf->limits.nelts - 1)); |
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205 |
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206 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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207 |
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208 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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209 "limit_req[%ui]: %i %ui.%03ui", |
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210 n, rc, excess / 1000, excess % 1000); |
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211 |
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212 if (rc != NGX_AGAIN) { |
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213 break; |
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214 } |
980 | 215 } |
216 | |
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217 if (rc == NGX_DECLINED) { |
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218 return NGX_DECLINED; |
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219 } |
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220 |
2294 | 221 r->main->limit_req_set = 1; |
980 | 222 |
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223 if (rc == NGX_BUSY || rc == NGX_ERROR) { |
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224 |
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225 if (rc == NGX_BUSY) { |
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226 ngx_log_error(lrcf->limit_log_level, r->connection->log, 0, |
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227 "limiting requests, excess: %ui.%03ui by zone \"%V\"", |
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228 excess / 1000, excess % 1000, |
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229 &limit->shm_zone->shm.name); |
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230 } |
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231 |
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232 while (n--) { |
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233 ctx = limits[n].shm_zone->data; |
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234 |
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235 if (ctx->node == NULL) { |
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236 continue; |
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237 } |
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238 |
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239 ngx_shmtx_lock(&ctx->shpool->mutex); |
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240 |
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241 ctx->node->count--; |
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242 |
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243 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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244 |
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245 ctx->node = NULL; |
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246 } |
980 | 247 |
248 return NGX_HTTP_SERVICE_UNAVAILABLE; | |
249 } | |
250 | |
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251 /* rc == NGX_AGAIN || rc == NGX_OK */ |
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252 |
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253 if (rc == NGX_AGAIN) { |
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254 excess = 0; |
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255 } |
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256 |
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257 delay = ngx_http_limit_req_account(limits, n, &excess, &limit); |
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258 |
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259 if (!delay) { |
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260 return NGX_DECLINED; |
2294 | 261 } |
262 | |
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263 ngx_log_error(lrcf->delay_log_level, r->connection->log, 0, |
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264 "delaying request, excess: %ui.%03ui, by zone \"%V\"", |
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265 excess / 1000, excess % 1000, &limit->shm_zone->shm.name); |
2294 | 266 |
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267 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
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268 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
2294 | 269 } |
270 | |
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271 r->read_event_handler = ngx_http_test_reading; |
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272 r->write_event_handler = ngx_http_limit_req_delay; |
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273 ngx_add_timer(r->connection->write, delay); |
2294 | 274 |
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275 return NGX_AGAIN; |
980 | 276 } |
277 | |
278 | |
279 static void | |
2294 | 280 ngx_http_limit_req_delay(ngx_http_request_t *r) |
281 { | |
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282 ngx_event_t *wev; |
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283 |
2294 | 284 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
2973 | 285 "limit_req delay"); |
2294 | 286 |
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287 wev = r->connection->write; |
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288 |
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289 if (!wev->timedout) { |
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290 |
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291 if (ngx_handle_write_event(wev, 0) != NGX_OK) { |
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292 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
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293 } |
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294 |
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295 return; |
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296 } |
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297 |
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298 wev->timedout = 0; |
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299 |
2294 | 300 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
301 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); | |
302 return; | |
303 } | |
304 | |
305 r->read_event_handler = ngx_http_block_reading; | |
306 r->write_event_handler = ngx_http_core_run_phases; | |
307 | |
308 ngx_http_core_run_phases(r); | |
309 } | |
310 | |
311 | |
312 static void | |
313 ngx_http_limit_req_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
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314 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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315 { |
2294 | 316 ngx_rbtree_node_t **p; |
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317 ngx_http_limit_req_node_t *lrn, *lrnt; |
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318 |
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319 for ( ;; ) { |
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320 |
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321 if (node->key < temp->key) { |
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322 |
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323 p = &temp->left; |
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324 |
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325 } else if (node->key > temp->key) { |
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326 |
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327 p = &temp->right; |
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328 |
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329 } else { /* node->key == temp->key */ |
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330 |
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331 lrn = (ngx_http_limit_req_node_t *) &node->color; |
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332 lrnt = (ngx_http_limit_req_node_t *) &temp->color; |
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333 |
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334 p = (ngx_memn2cmp(lrn->data, lrnt->data, lrn->len, lrnt->len) < 0) |
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335 ? &temp->left : &temp->right; |
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336 } |
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337 |
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338 if (*p == sentinel) { |
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339 break; |
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340 } |
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341 |
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342 temp = *p; |
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343 } |
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344 |
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345 *p = node; |
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346 node->parent = temp; |
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347 node->left = sentinel; |
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|
348 node->right = sentinel; |
38be15c1379a
fix duplicate rbtree keys case
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|
349 ngx_rbt_red(node); |
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fix duplicate rbtree keys case
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|
350 } |
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fix duplicate rbtree keys case
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|
351 |
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fix duplicate rbtree keys case
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|
352 |
2294 | 353 static ngx_int_t |
4420
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Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
354 ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit, ngx_uint_t hash, |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
355 u_char *data, size_t len, ngx_uint_t *ep, ngx_uint_t account) |
980 | 356 { |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
357 size_t size; |
2313 | 358 ngx_int_t rc, excess; |
2294 | 359 ngx_time_t *tp; |
360 ngx_msec_t now; | |
361 ngx_msec_int_t ms; | |
362 ngx_rbtree_node_t *node, *sentinel; | |
363 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
|
364 ngx_http_limit_req_node_t *lr; |
2294 | 365 |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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parents:
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diff
changeset
|
366 tp = ngx_timeofday(); |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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parents:
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diff
changeset
|
367 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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parents:
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diff
changeset
|
368 |
4420
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Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
369 ctx = limit->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
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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 | |
4497
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4424
diff
changeset
|
388 lr = (ngx_http_limit_req_node_t *) &node->color; |
2294 | 389 |
4497
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4424
diff
changeset
|
390 rc = ngx_memn2cmp(data, lr->data, len, (size_t) lr->len); |
3191 | 391 |
4497
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
392 if (rc == 0) { |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
393 ngx_queue_remove(&lr->queue); |
95ab6658654a
Fix of rbtree lookup on hash collisions.
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parents:
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diff
changeset
|
394 ngx_queue_insert_head(&ctx->sh->queue, &lr->queue); |
3183
b87542338ac3
make limit_req to conform to the leaky bucket algorithm
Igor Sysoev <igor@sysoev.ru>
parents:
2973
diff
changeset
|
395 |
4497
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
396 ms = (ngx_msec_int_t) (now - lr->last); |
980 | 397 |
4497
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
398 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
4420
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Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
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changeset
|
399 |
4497
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
400 if (excess < 0) { |
95ab6658654a
Fix of rbtree lookup on hash collisions.
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parents:
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diff
changeset
|
401 excess = 0; |
2294 | 402 } |
403 | |
4497
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
404 *ep = excess; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
405 |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4424
diff
changeset
|
406 if ((ngx_uint_t) excess > limit->burst) { |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
407 return NGX_BUSY; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
408 } |
2294 | 409 |
4497
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4424
diff
changeset
|
410 if (account) { |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
411 lr->excess = excess; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
412 lr->last = now; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
413 return NGX_OK; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
414 } |
2294 | 415 |
4497
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
416 lr->count++; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4424
diff
changeset
|
417 |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
418 ctx->node = lr; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
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|
419 |
95ab6658654a
Fix of rbtree lookup on hash collisions.
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parents:
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changeset
|
420 return NGX_AGAIN; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
421 } |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4424
diff
changeset
|
422 |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
423 node = (rc < 0) ? node->left : node->right; |
980 | 424 } |
425 | |
3779
57aecfdcac3d
an excess was logged as 0.000 if requests were limited without delay:
Igor Sysoev <igor@sysoev.ru>
parents:
3525
diff
changeset
|
426 *ep = 0; |
2294 | 427 |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
428 size = offsetof(ngx_rbtree_node_t, color) |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
429 + offsetof(ngx_http_limit_req_node_t, data) |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
430 + len; |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
431 |
4419
7084faa7a4b4
Limit req: number of cleanup calls reduced.
Valentin Bartenev <vbart@nginx.com>
parents:
4418
diff
changeset
|
432 ngx_http_limit_req_expire(ctx, 1); |
7084faa7a4b4
Limit req: number of cleanup calls reduced.
Valentin Bartenev <vbart@nginx.com>
parents:
4418
diff
changeset
|
433 |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
434 node = ngx_slab_alloc_locked(ctx->shpool, size); |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
435 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
436 if (node == NULL) { |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
437 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
|
438 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
439 node = ngx_slab_alloc_locked(ctx->shpool, size); |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
440 if (node == NULL) { |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
441 return NGX_ERROR; |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
442 } |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
443 } |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
444 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
445 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
|
446 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
447 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
|
448 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
449 lr->len = (u_char) len; |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
450 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
|
451 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
452 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
|
453 |
4832
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
454 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
|
455 |
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
456 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
|
457 |
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
458 if (account) { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
459 lr->last = now; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
460 lr->count = 0; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
461 return NGX_OK; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
462 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
463 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
464 lr->last = 0; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
465 lr->count = 1; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
466 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
467 ctx->node = lr; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
468 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
469 return NGX_AGAIN; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
470 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
471 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
472 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
473 static ngx_msec_t |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
474 ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, ngx_uint_t n, |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
475 ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit) |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
476 { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
477 ngx_int_t excess; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
478 ngx_time_t *tp; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
479 ngx_msec_t now, delay, max_delay; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
480 ngx_msec_int_t ms; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
481 ngx_http_limit_req_ctx_t *ctx; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
482 ngx_http_limit_req_node_t *lr; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
483 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
484 excess = *ep; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
485 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
486 if (excess == 0 || (*limit)->nodelay) { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
487 max_delay = 0; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
488 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
489 } else { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
490 ctx = (*limit)->shm_zone->data; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
491 max_delay = excess * 1000 / ctx->rate; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
492 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
493 |
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494 while (n--) { |
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495 ctx = limits[n].shm_zone->data; |
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496 lr = ctx->node; |
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497 |
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498 if (lr == NULL) { |
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499 continue; |
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500 } |
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501 |
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502 ngx_shmtx_lock(&ctx->shpool->mutex); |
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503 |
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504 tp = ngx_timeofday(); |
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505 |
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506 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
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507 ms = (ngx_msec_int_t) (now - lr->last); |
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508 |
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509 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
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510 |
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511 if (excess < 0) { |
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512 excess = 0; |
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513 } |
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514 |
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515 lr->last = now; |
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516 lr->excess = excess; |
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517 lr->count--; |
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518 |
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519 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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520 |
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521 ctx->node = NULL; |
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522 |
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523 if (limits[n].nodelay) { |
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524 continue; |
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525 } |
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526 |
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527 delay = excess * 1000 / ctx->rate; |
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528 |
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529 if (delay > max_delay) { |
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530 max_delay = delay; |
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531 *ep = excess; |
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532 *limit = &limits[n]; |
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533 } |
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534 } |
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535 |
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536 return max_delay; |
2294 | 537 } |
538 | |
539 | |
540 static void | |
541 ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, ngx_uint_t n) | |
542 { | |
2313 | 543 ngx_int_t excess; |
2294 | 544 ngx_time_t *tp; |
545 ngx_msec_t now; | |
546 ngx_queue_t *q; | |
547 ngx_msec_int_t ms; | |
548 ngx_rbtree_node_t *node; | |
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549 ngx_http_limit_req_node_t *lr; |
2294 | 550 |
551 tp = ngx_timeofday(); | |
552 | |
553 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); | |
554 | |
555 /* | |
556 * n == 1 deletes one or two zero rate entries | |
557 * n == 0 deletes oldest entry by force | |
558 * and one or two zero rate entries | |
559 */ | |
560 | |
561 while (n < 3) { | |
562 | |
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563 if (ngx_queue_empty(&ctx->sh->queue)) { |
2294 | 564 return; |
565 } | |
566 | |
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567 q = ngx_queue_last(&ctx->sh->queue); |
2294 | 568 |
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569 lr = ngx_queue_data(q, ngx_http_limit_req_node_t, queue); |
2294 | 570 |
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571 if (lr->count) { |
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572 |
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573 /* |
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574 * There is not much sense in looking further, |
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575 * because we bump nodes on the lookup stage. |
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576 */ |
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577 |
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578 return; |
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579 } |
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580 |
2294 | 581 if (n++ != 0) { |
582 | |
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583 ms = (ngx_msec_int_t) (now - lr->last); |
2294 | 584 ms = ngx_abs(ms); |
585 | |
586 if (ms < 60000) { | |
587 return; | |
588 } | |
589 | |
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590 excess = lr->excess - ctx->rate * ms / 1000; |
2294 | 591 |
2313 | 592 if (excess > 0) { |
2294 | 593 return; |
594 } | |
595 } | |
596 | |
597 ngx_queue_remove(q); | |
598 | |
599 node = (ngx_rbtree_node_t *) | |
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600 ((u_char *) lr - offsetof(ngx_rbtree_node_t, color)); |
2294 | 601 |
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602 ngx_rbtree_delete(&ctx->sh->rbtree, node); |
2294 | 603 |
604 ngx_slab_free_locked(ctx->shpool, node); | |
605 } | |
980 | 606 } |
607 | |
608 | |
609 static ngx_int_t | |
2294 | 610 ngx_http_limit_req_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
980 | 611 { |
2294 | 612 ngx_http_limit_req_ctx_t *octx = data; |
993
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613 |
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614 size_t len; |
2294 | 615 ngx_http_limit_req_ctx_t *ctx; |
980 | 616 |
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617 ctx = shm_zone->data; |
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618 |
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619 if (octx) { |
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620 if (ngx_strcmp(ctx->var.data, octx->var.data) != 0) { |
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621 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
2294 | 622 "limit_req \"%V\" uses the \"%V\" variable " |
993
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623 "while previously it used the \"%V\" variable", |
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624 &shm_zone->shm.name, &ctx->var, &octx->var); |
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625 return NGX_ERROR; |
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626 } |
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627 |
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628 ctx->sh = octx->sh; |
2294 | 629 ctx->shpool = octx->shpool; |
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630 |
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631 return NGX_OK; |
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632 } |
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633 |
2294 | 634 ctx->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
980 | 635 |
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636 if (shm_zone->shm.exists) { |
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637 ctx->sh = ctx->shpool->data; |
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638 |
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639 return NGX_OK; |
980 | 640 } |
641 | |
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642 ctx->sh = ngx_slab_alloc(ctx->shpool, sizeof(ngx_http_limit_req_shctx_t)); |
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643 if (ctx->sh == NULL) { |
980 | 644 return NGX_ERROR; |
645 } | |
646 | |
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647 ctx->shpool->data = ctx->sh; |
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648 |
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649 ngx_rbtree_init(&ctx->sh->rbtree, &ctx->sh->sentinel, |
2294 | 650 ngx_http_limit_req_rbtree_insert_value); |
651 | |
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652 ngx_queue_init(&ctx->sh->queue); |
980 | 653 |
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654 len = sizeof(" in limit_req zone \"\"") + shm_zone->shm.name.len; |
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655 |
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656 ctx->shpool->log_ctx = ngx_slab_alloc(ctx->shpool, len); |
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657 if (ctx->shpool->log_ctx == NULL) { |
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658 return NGX_ERROR; |
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659 } |
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660 |
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661 ngx_sprintf(ctx->shpool->log_ctx, " in limit_req zone \"%V\"%Z", |
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662 &shm_zone->shm.name); |
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663 |
980 | 664 return NGX_OK; |
665 } | |
666 | |
667 | |
668 static void * | |
2294 | 669 ngx_http_limit_req_create_conf(ngx_conf_t *cf) |
980 | 670 { |
2294 | 671 ngx_http_limit_req_conf_t *conf; |
980 | 672 |
2294 | 673 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_conf_t)); |
980 | 674 if (conf == NULL) { |
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675 return NULL; |
980 | 676 } |
677 | |
678 /* | |
679 * set by ngx_pcalloc(): | |
680 * | |
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681 * conf->limits.elts = NULL; |
980 | 682 */ |
683 | |
3185 | 684 conf->limit_log_level = NGX_CONF_UNSET_UINT; |
685 | |
980 | 686 return conf; |
687 } | |
688 | |
689 | |
690 static char * | |
2294 | 691 ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
980 | 692 { |
2294 | 693 ngx_http_limit_req_conf_t *prev = parent; |
694 ngx_http_limit_req_conf_t *conf = child; | |
980 | 695 |
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696 if (conf->limits.elts == NULL) { |
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|
697 conf->limits = prev->limits; |
980 | 698 } |
699 | |
3185 | 700 ngx_conf_merge_uint_value(conf->limit_log_level, prev->limit_log_level, |
701 NGX_LOG_ERR); | |
702 | |
703 conf->delay_log_level = (conf->limit_log_level == NGX_LOG_INFO) ? | |
704 NGX_LOG_INFO : conf->limit_log_level + 1; | |
705 | |
980 | 706 return NGX_CONF_OK; |
707 } | |
708 | |
709 | |
710 static char * | |
2294 | 711 ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
980 | 712 { |
2294 | 713 u_char *p; |
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714 size_t len; |
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Limit req: improved error handling when parsing "zone" parameter of
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changeset
|
715 ssize_t size; |
2294 | 716 ngx_str_t *value, name, s; |
717 ngx_int_t rate, scale; | |
718 ngx_uint_t i; | |
719 ngx_shm_zone_t *shm_zone; | |
720 ngx_http_limit_req_ctx_t *ctx; | |
980 | 721 |
722 value = cf->args->elts; | |
723 | |
2294 | 724 ctx = NULL; |
725 size = 0; | |
726 rate = 1; | |
727 scale = 1; | |
728 name.len = 0; | |
729 | |
730 for (i = 1; i < cf->args->nelts; i++) { | |
731 | |
732 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
733 | |
734 name.data = value[i].data + 5; | |
735 | |
736 p = (u_char *) ngx_strchr(name.data, ':'); | |
737 | |
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738 if (p == NULL) { |
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739 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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740 "invalid zone size \"%V\"", &value[i]); |
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741 return NGX_CONF_ERROR; |
2294 | 742 } |
743 | |
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744 name.len = p - name.data; |
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745 |
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746 s.data = p + 1; |
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747 s.len = value[i].data + value[i].len - s.data; |
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748 |
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749 size = ngx_parse_size(&s); |
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750 |
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751 if (size == NGX_ERROR) { |
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752 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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753 "invalid zone size \"%V\"", &value[i]); |
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754 return NGX_CONF_ERROR; |
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755 } |
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756 |
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757 if (size < (ssize_t) (8 * ngx_pagesize)) { |
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758 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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759 "zone \"%V\" is too small", &value[i]); |
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|
760 return NGX_CONF_ERROR; |
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761 } |
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762 |
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763 continue; |
2294 | 764 } |
765 | |
766 if (ngx_strncmp(value[i].data, "rate=", 5) == 0) { | |
767 | |
768 len = value[i].len; | |
769 p = value[i].data + len - 3; | |
987 | 770 |
2294 | 771 if (ngx_strncmp(p, "r/s", 3) == 0) { |
772 scale = 1; | |
773 len -= 3; | |
774 | |
775 } else if (ngx_strncmp(p, "r/m", 3) == 0) { | |
776 scale = 60; | |
777 len -= 3; | |
778 } | |
779 | |
780 rate = ngx_atoi(value[i].data + 5, len - 5); | |
781 if (rate <= NGX_ERROR) { | |
782 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
783 "invalid rate \"%V\"", &value[i]); | |
784 return NGX_CONF_ERROR; | |
785 } | |
786 | |
787 continue; | |
788 } | |
789 | |
790 if (value[i].data[0] == '$') { | |
987 | 791 |
2294 | 792 value[i].len--; |
793 value[i].data++; | |
794 | |
795 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_ctx_t)); | |
796 if (ctx == NULL) { | |
797 return NGX_CONF_ERROR; | |
798 } | |
799 | |
800 ctx->index = ngx_http_get_variable_index(cf, &value[i]); | |
801 if (ctx->index == NGX_ERROR) { | |
802 return NGX_CONF_ERROR; | |
803 } | |
804 | |
805 ctx->var = value[i]; | |
806 | |
807 continue; | |
808 } | |
809 | |
810 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
811 "invalid parameter \"%V\"", &value[i]); | |
987 | 812 return NGX_CONF_ERROR; |
813 } | |
814 | |
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815 if (name.len == 0) { |
2294 | 816 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
817 "\"%V\" must have \"zone\" parameter", | |
818 &cmd->name); | |
987 | 819 return NGX_CONF_ERROR; |
820 } | |
821 | |
2294 | 822 if (ctx == NULL) { |
980 | 823 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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824 "no variable is defined for %V \"%V\"", |
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825 &cmd->name, &name); |
980 | 826 return NGX_CONF_ERROR; |
827 } | |
828 | |
2313 | 829 ctx->rate = rate * 1000 / scale; |
980 | 830 |
2294 | 831 shm_zone = ngx_shared_memory_add(cf, &name, size, |
832 &ngx_http_limit_req_module); | |
980 | 833 if (shm_zone == NULL) { |
834 return NGX_CONF_ERROR; | |
835 } | |
836 | |
987 | 837 if (shm_zone->data) { |
838 ctx = shm_zone->data; | |
839 | |
840 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
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841 "%V \"%V\" is already bound to variable \"%V\"", |
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|
842 &cmd->name, &name, &ctx->var); |
987 | 843 return NGX_CONF_ERROR; |
844 } | |
845 | |
2294 | 846 shm_zone->init = ngx_http_limit_req_init_zone; |
987 | 847 shm_zone->data = ctx; |
980 | 848 |
849 return NGX_CONF_OK; | |
850 } | |
851 | |
852 | |
853 static char * | |
2294 | 854 ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
980 | 855 { |
2374
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856 ngx_http_limit_req_conf_t *lrcf = conf; |
980 | 857 |
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858 ngx_int_t burst; |
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859 ngx_str_t *value, s; |
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860 ngx_uint_t i, nodelay; |
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861 ngx_shm_zone_t *shm_zone; |
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862 ngx_http_limit_req_limit_t *limit, *limits; |
980 | 863 |
864 value = cf->args->elts; | |
865 | |
4420
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|
866 shm_zone = NULL; |
2294 | 867 burst = 0; |
4420
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|
868 nodelay = 0; |
2294 | 869 |
870 for (i = 1; i < cf->args->nelts; i++) { | |
871 | |
872 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
873 | |
874 s.len = value[i].len - 5; | |
875 s.data = value[i].data + 5; | |
876 | |
4420
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|
877 shm_zone = ngx_shared_memory_add(cf, &s, 0, |
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|
878 &ngx_http_limit_req_module); |
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Limit req: support for multiple "limit_req" limits.
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|
879 if (shm_zone == NULL) { |
2294 | 880 return NGX_CONF_ERROR; |
881 } | |
882 | |
883 continue; | |
884 } | |
885 | |
886 if (ngx_strncmp(value[i].data, "burst=", 6) == 0) { | |
887 | |
2300
159136c9808d
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parents:
2294
diff
changeset
|
888 burst = ngx_atoi(value[i].data + 6, value[i].len - 6); |
2294 | 889 if (burst <= 0) { |
890 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
891 "invalid burst rate \"%V\"", &value[i]); | |
892 return NGX_CONF_ERROR; | |
893 } | |
894 | |
895 continue; | |
896 } | |
897 | |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
898 if (ngx_strncmp(value[i].data, "nodelay", 7) == 0) { |
4420
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changeset
|
899 nodelay = 1; |
2294 | 900 continue; |
901 } | |
902 | |
903 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
904 "invalid parameter \"%V\"", &value[i]); | |
980 | 905 return NGX_CONF_ERROR; |
906 } | |
907 | |
4420
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Limit req: support for multiple "limit_req" limits.
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|
908 if (shm_zone == NULL) { |
980 | 909 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
2294 | 910 "\"%V\" must have \"zone\" parameter", |
911 &cmd->name); | |
980 | 912 return NGX_CONF_ERROR; |
913 } | |
914 | |
4420
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Limit req: support for multiple "limit_req" limits.
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diff
changeset
|
915 if (shm_zone->data == NULL) { |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
916 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
2294 | 917 "unknown limit_req_zone \"%V\"", |
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|
918 &shm_zone->shm.name); |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
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1002
diff
changeset
|
919 return NGX_CONF_ERROR; |
19118c44303f
test length of variable and number of connections
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parents:
1002
diff
changeset
|
920 } |
19118c44303f
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diff
changeset
|
921 |
4420
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|
922 limits = lrcf->limits.elts; |
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|
923 |
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Limit req: support for multiple "limit_req" limits.
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|
924 if (limits == NULL) { |
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Limit req: support for multiple "limit_req" limits.
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925 if (ngx_array_init(&lrcf->limits, cf->pool, 1, |
9ce48f9eb85b
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4419
diff
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|
926 sizeof(ngx_http_limit_req_limit_t)) |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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parents:
4419
diff
changeset
|
927 != NGX_OK) |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
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|
928 { |
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Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
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|
929 return NGX_CONF_ERROR; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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|
930 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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|
931 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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|
932 |
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Limit req: support for multiple "limit_req" limits.
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|
933 for (i = 0; i < lrcf->limits.nelts; i++) { |
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Limit req: support for multiple "limit_req" limits.
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|
934 if (shm_zone == limits[i].shm_zone) { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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changeset
|
935 return "is duplicate"; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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4419
diff
changeset
|
936 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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4419
diff
changeset
|
937 } |
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Limit req: support for multiple "limit_req" limits.
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changeset
|
938 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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4419
diff
changeset
|
939 limit = ngx_array_push(&lrcf->limits); |
4811
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
940 if (limit == NULL) { |
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
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4499
diff
changeset
|
941 return NGX_CONF_ERROR; |
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
parents:
4499
diff
changeset
|
942 } |
4420
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Limit req: support for multiple "limit_req" limits.
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parents:
4419
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|
943 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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changeset
|
944 limit->shm_zone = shm_zone; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
945 limit->burst = burst * 1000; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
946 limit->nodelay = nodelay; |
980 | 947 |
948 return NGX_CONF_OK; | |
949 } | |
950 | |
951 | |
952 static ngx_int_t | |
2294 | 953 ngx_http_limit_req_init(ngx_conf_t *cf) |
980 | 954 { |
955 ngx_http_handler_pt *h; | |
956 ngx_http_core_main_conf_t *cmcf; | |
957 | |
958 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
959 | |
960 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
961 if (h == NULL) { | |
962 return NGX_ERROR; | |
963 } | |
964 | |
2294 | 965 *h = ngx_http_limit_req_handler; |
980 | 966 |
967 return NGX_OK; | |
968 } |