Mercurial > hg > nginx
annotate src/http/modules/ngx_http_limit_req_module.c @ 6640:e78eca6bfaf0
HTTP/2: fixed send timer handling.
Checking for return value of c->send_chain() isn't sufficient since there
are data can be left in the SSL buffer. Now the wew->ready flag is used
instead.
In particular, this fixed a connection leak in cases when all streams were
closed, but there's still some data to be sent in the SSL buffer and the
client forgot about the connection.
| author | Valentin Bartenev <vbart@nginx.com> |
|---|---|
| date | Tue, 19 Jul 2016 20:31:09 +0300 |
| parents | 3b7a60371a9a |
| children | 7a6456398fc3 |
| 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_http_complex_value_t key; |
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39 ngx_http_limit_req_node_t *node; |
| 2294 | 40 } ngx_http_limit_req_ctx_t; |
| 987 | 41 |
| 42 | |
| 43 typedef struct { | |
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44 ngx_shm_zone_t *shm_zone; |
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45 /* integer value, 1 corresponds to 0.001 r/s */ |
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46 ngx_uint_t burst; |
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47 ngx_uint_t nodelay; /* unsigned nodelay:1 */ |
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48 } ngx_http_limit_req_limit_t; |
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49 |
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50 |
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51 typedef struct { |
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52 ngx_array_t limits; |
| 3185 | 53 ngx_uint_t limit_log_level; |
| 54 ngx_uint_t delay_log_level; | |
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55 ngx_uint_t status_code; |
| 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, ngx_str_t *key, ngx_uint_t *ep, ngx_uint_t account); |
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62 static ngx_msec_t ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, |
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63 ngx_uint_t n, ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit); |
| 2294 | 64 static void ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, |
| 65 ngx_uint_t n); | |
| 980 | 66 |
| 2294 | 67 static void *ngx_http_limit_req_create_conf(ngx_conf_t *cf); |
| 68 static char *ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, | |
| 980 | 69 void *child); |
| 2294 | 70 static char *ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
| 980 | 71 void *conf); |
| 2294 | 72 static char *ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, |
| 980 | 73 void *conf); |
| 2294 | 74 static ngx_int_t ngx_http_limit_req_init(ngx_conf_t *cf); |
| 980 | 75 |
| 76 | |
| 3185 | 77 static ngx_conf_enum_t ngx_http_limit_req_log_levels[] = { |
| 78 { ngx_string("info"), NGX_LOG_INFO }, | |
| 79 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
| 80 { ngx_string("warn"), NGX_LOG_WARN }, | |
| 81 { ngx_string("error"), NGX_LOG_ERR }, | |
| 82 { ngx_null_string, 0 } | |
| 83 }; | |
| 84 | |
| 85 | |
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86 static ngx_conf_num_bounds_t ngx_http_limit_req_status_bounds = { |
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87 ngx_conf_check_num_bounds, 400, 599 |
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88 }; |
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89 |
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90 |
| 2294 | 91 static ngx_command_t ngx_http_limit_req_commands[] = { |
| 980 | 92 |
| 2294 | 93 { ngx_string("limit_req_zone"), |
| 987 | 94 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3, |
| 2294 | 95 ngx_http_limit_req_zone, |
| 980 | 96 0, |
| 97 0, | |
| 98 NULL }, | |
| 99 | |
| 2294 | 100 { ngx_string("limit_req"), |
| 101 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123, | |
| 102 ngx_http_limit_req, | |
| 980 | 103 NGX_HTTP_LOC_CONF_OFFSET, |
| 104 0, | |
| 105 NULL }, | |
| 106 | |
| 3185 | 107 { ngx_string("limit_req_log_level"), |
| 108 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 109 ngx_conf_set_enum_slot, | |
| 110 NGX_HTTP_LOC_CONF_OFFSET, | |
| 111 offsetof(ngx_http_limit_req_conf_t, limit_log_level), | |
| 112 &ngx_http_limit_req_log_levels }, | |
| 113 | |
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114 { ngx_string("limit_req_status"), |
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115 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
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116 ngx_conf_set_num_slot, |
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117 NGX_HTTP_LOC_CONF_OFFSET, |
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118 offsetof(ngx_http_limit_req_conf_t, status_code), |
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119 &ngx_http_limit_req_status_bounds }, |
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120 |
| 980 | 121 ngx_null_command |
| 122 }; | |
| 123 | |
| 124 | |
| 2294 | 125 static ngx_http_module_t ngx_http_limit_req_module_ctx = { |
| 980 | 126 NULL, /* preconfiguration */ |
| 2294 | 127 ngx_http_limit_req_init, /* postconfiguration */ |
| 980 | 128 |
| 129 NULL, /* create main configuration */ | |
| 130 NULL, /* init main configuration */ | |
| 131 | |
| 132 NULL, /* create server configuration */ | |
| 133 NULL, /* merge server configuration */ | |
| 134 | |
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135 ngx_http_limit_req_create_conf, /* create location configuration */ |
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136 ngx_http_limit_req_merge_conf /* merge location configuration */ |
| 980 | 137 }; |
| 138 | |
| 139 | |
| 2294 | 140 ngx_module_t ngx_http_limit_req_module = { |
| 980 | 141 NGX_MODULE_V1, |
| 2294 | 142 &ngx_http_limit_req_module_ctx, /* module context */ |
| 143 ngx_http_limit_req_commands, /* module directives */ | |
| 980 | 144 NGX_HTTP_MODULE, /* module type */ |
| 145 NULL, /* init master */ | |
| 146 NULL, /* init module */ | |
| 147 NULL, /* init process */ | |
| 148 NULL, /* init thread */ | |
| 149 NULL, /* exit thread */ | |
| 150 NULL, /* exit process */ | |
| 151 NULL, /* exit master */ | |
| 152 NGX_MODULE_V1_PADDING | |
| 153 }; | |
| 154 | |
| 155 | |
| 156 static ngx_int_t | |
| 2294 | 157 ngx_http_limit_req_handler(ngx_http_request_t *r) |
| 980 | 158 { |
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159 uint32_t hash; |
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160 ngx_str_t key; |
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161 ngx_int_t rc; |
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162 ngx_uint_t n, excess; |
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163 ngx_msec_t delay; |
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164 ngx_http_limit_req_ctx_t *ctx; |
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165 ngx_http_limit_req_conf_t *lrcf; |
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166 ngx_http_limit_req_limit_t *limit, *limits; |
| 980 | 167 |
| 2294 | 168 if (r->main->limit_req_set) { |
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169 return NGX_DECLINED; |
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170 } |
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171 |
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172 lrcf = ngx_http_get_module_loc_conf(r, ngx_http_limit_req_module); |
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173 limits = lrcf->limits.elts; |
| 980 | 174 |
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175 excess = 0; |
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176 |
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177 rc = NGX_DECLINED; |
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178 |
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179 #if (NGX_SUPPRESS_WARN) |
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180 limit = NULL; |
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181 #endif |
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182 |
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183 for (n = 0; n < lrcf->limits.nelts; n++) { |
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184 |
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185 limit = &limits[n]; |
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186 |
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187 ctx = limit->shm_zone->data; |
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188 |
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189 if (ngx_http_complex_value(r, &ctx->key, &key) != NGX_OK) { |
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190 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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191 } |
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192 |
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193 if (key.len == 0) { |
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194 continue; |
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195 } |
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196 |
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197 if (key.len > 65535) { |
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198 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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199 "the value of the \"%V\" key " |
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200 "is more than 65535 bytes: \"%V\"", |
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201 &ctx->key.value, &key); |
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202 continue; |
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203 } |
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204 |
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205 hash = ngx_crc32_short(key.data, key.len); |
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206 |
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207 ngx_shmtx_lock(&ctx->shpool->mutex); |
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208 |
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209 rc = ngx_http_limit_req_lookup(limit, hash, &key, &excess, |
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210 (n == lrcf->limits.nelts - 1)); |
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211 |
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212 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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213 |
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214 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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215 "limit_req[%ui]: %i %ui.%03ui", |
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216 n, rc, excess / 1000, excess % 1000); |
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217 |
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218 if (rc != NGX_AGAIN) { |
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219 break; |
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220 } |
| 980 | 221 } |
| 222 | |
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223 if (rc == NGX_DECLINED) { |
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224 return NGX_DECLINED; |
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225 } |
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226 |
| 2294 | 227 r->main->limit_req_set = 1; |
| 980 | 228 |
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229 if (rc == NGX_BUSY || rc == NGX_ERROR) { |
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230 |
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231 if (rc == NGX_BUSY) { |
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232 ngx_log_error(lrcf->limit_log_level, r->connection->log, 0, |
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233 "limiting requests, excess: %ui.%03ui by zone \"%V\"", |
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234 excess / 1000, excess % 1000, |
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235 &limit->shm_zone->shm.name); |
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236 } |
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237 |
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238 while (n--) { |
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239 ctx = limits[n].shm_zone->data; |
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240 |
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241 if (ctx->node == NULL) { |
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242 continue; |
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243 } |
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244 |
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245 ngx_shmtx_lock(&ctx->shpool->mutex); |
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246 |
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247 ctx->node->count--; |
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248 |
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249 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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250 |
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251 ctx->node = NULL; |
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252 } |
| 980 | 253 |
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254 return lrcf->status_code; |
| 980 | 255 } |
| 256 | |
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257 /* rc == NGX_AGAIN || rc == NGX_OK */ |
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258 |
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259 if (rc == NGX_AGAIN) { |
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260 excess = 0; |
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261 } |
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262 |
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263 delay = ngx_http_limit_req_account(limits, n, &excess, &limit); |
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264 |
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265 if (!delay) { |
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266 return NGX_DECLINED; |
| 2294 | 267 } |
| 268 | |
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269 ngx_log_error(lrcf->delay_log_level, r->connection->log, 0, |
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270 "delaying request, excess: %ui.%03ui, by zone \"%V\"", |
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271 excess / 1000, excess % 1000, &limit->shm_zone->shm.name); |
| 2294 | 272 |
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273 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
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274 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 2294 | 275 } |
| 276 | |
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277 r->read_event_handler = ngx_http_test_reading; |
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278 r->write_event_handler = ngx_http_limit_req_delay; |
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279 ngx_add_timer(r->connection->write, delay); |
| 2294 | 280 |
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281 return NGX_AGAIN; |
| 980 | 282 } |
| 283 | |
| 284 | |
| 285 static void | |
| 2294 | 286 ngx_http_limit_req_delay(ngx_http_request_t *r) |
| 287 { | |
|
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288 ngx_event_t *wev; |
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289 |
| 2294 | 290 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| 2973 | 291 "limit_req delay"); |
| 2294 | 292 |
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293 wev = r->connection->write; |
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294 |
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295 if (!wev->timedout) { |
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296 |
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297 if (ngx_handle_write_event(wev, 0) != NGX_OK) { |
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298 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
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299 } |
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300 |
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301 return; |
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302 } |
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303 |
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304 wev->timedout = 0; |
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305 |
| 2294 | 306 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
| 307 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); | |
| 308 return; | |
| 309 } | |
| 310 | |
| 311 r->read_event_handler = ngx_http_block_reading; | |
| 312 r->write_event_handler = ngx_http_core_run_phases; | |
| 313 | |
| 314 ngx_http_core_run_phases(r); | |
| 315 } | |
| 316 | |
| 317 | |
| 318 static void | |
| 319 ngx_http_limit_req_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
|
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320 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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321 { |
| 2294 | 322 ngx_rbtree_node_t **p; |
|
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323 ngx_http_limit_req_node_t *lrn, *lrnt; |
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324 |
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325 for ( ;; ) { |
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326 |
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327 if (node->key < temp->key) { |
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328 |
|
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329 p = &temp->left; |
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330 |
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331 } else if (node->key > temp->key) { |
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332 |
|
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333 p = &temp->right; |
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334 |
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335 } else { /* node->key == temp->key */ |
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336 |
|
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337 lrn = (ngx_http_limit_req_node_t *) &node->color; |
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338 lrnt = (ngx_http_limit_req_node_t *) &temp->color; |
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339 |
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340 p = (ngx_memn2cmp(lrn->data, lrnt->data, lrn->len, lrnt->len) < 0) |
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341 ? &temp->left : &temp->right; |
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342 } |
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343 |
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344 if (*p == sentinel) { |
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345 break; |
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346 } |
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347 |
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348 temp = *p; |
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349 } |
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350 |
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351 *p = node; |
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352 node->parent = temp; |
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353 node->left = sentinel; |
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354 node->right = sentinel; |
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355 ngx_rbt_red(node); |
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356 } |
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357 |
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358 |
| 2294 | 359 static ngx_int_t |
|
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360 ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit, ngx_uint_t hash, |
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361 ngx_str_t *key, ngx_uint_t *ep, ngx_uint_t account) |
| 980 | 362 { |
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363 size_t size; |
| 2313 | 364 ngx_int_t rc, excess; |
| 2294 | 365 ngx_time_t *tp; |
| 366 ngx_msec_t now; | |
| 367 ngx_msec_int_t ms; | |
| 368 ngx_rbtree_node_t *node, *sentinel; | |
| 369 ngx_http_limit_req_ctx_t *ctx; | |
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370 ngx_http_limit_req_node_t *lr; |
| 2294 | 371 |
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372 tp = ngx_timeofday(); |
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373 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
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374 |
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375 ctx = limit->shm_zone->data; |
| 2294 | 376 |
|
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377 node = ctx->sh->rbtree.root; |
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378 sentinel = ctx->sh->rbtree.sentinel; |
| 980 | 379 |
| 2294 | 380 while (node != sentinel) { |
| 381 | |
| 382 if (hash < node->key) { | |
| 383 node = node->left; | |
| 384 continue; | |
| 385 } | |
| 386 | |
| 387 if (hash > node->key) { | |
| 388 node = node->right; | |
| 389 continue; | |
| 390 } | |
| 391 | |
| 392 /* hash == node->key */ | |
| 393 | |
|
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394 lr = (ngx_http_limit_req_node_t *) &node->color; |
| 2294 | 395 |
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396 rc = ngx_memn2cmp(key->data, lr->data, key->len, (size_t) lr->len); |
| 3191 | 397 |
|
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398 if (rc == 0) { |
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|
399 ngx_queue_remove(&lr->queue); |
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|
400 ngx_queue_insert_head(&ctx->sh->queue, &lr->queue); |
|
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|
401 |
|
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402 ms = (ngx_msec_int_t) (now - lr->last); |
| 980 | 403 |
|
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|
404 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
|
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405 |
|
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|
406 if (excess < 0) { |
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407 excess = 0; |
| 2294 | 408 } |
| 409 | |
|
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|
410 *ep = excess; |
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|
411 |
|
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|
412 if ((ngx_uint_t) excess > limit->burst) { |
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|
413 return NGX_BUSY; |
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|
414 } |
| 2294 | 415 |
|
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|
416 if (account) { |
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|
417 lr->excess = excess; |
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|
418 lr->last = now; |
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|
419 return NGX_OK; |
|
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|
420 } |
| 2294 | 421 |
|
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|
422 lr->count++; |
|
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|
423 |
|
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|
424 ctx->node = lr; |
|
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|
425 |
|
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|
426 return NGX_AGAIN; |
|
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|
427 } |
|
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|
428 |
|
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|
429 node = (rc < 0) ? node->left : node->right; |
| 980 | 430 } |
| 431 | |
|
3779
57aecfdcac3d
an excess was logged as 0.000 if requests were limited without delay:
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
432 *ep = 0; |
| 2294 | 433 |
|
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changeset
|
434 size = offsetof(ngx_rbtree_node_t, color) |
|
aac79fc948cc
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changeset
|
435 + offsetof(ngx_http_limit_req_node_t, data) |
|
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changeset
|
436 + key->len; |
|
4418
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diff
changeset
|
437 |
|
4419
7084faa7a4b4
Limit req: number of cleanup calls reduced.
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parents:
4418
diff
changeset
|
438 ngx_http_limit_req_expire(ctx, 1); |
|
7084faa7a4b4
Limit req: number of cleanup calls reduced.
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4418
diff
changeset
|
439 |
|
4418
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changeset
|
440 node = ngx_slab_alloc_locked(ctx->shpool, size); |
|
aac79fc948cc
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changeset
|
441 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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changeset
|
442 if (node == NULL) { |
|
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diff
changeset
|
443 ngx_http_limit_req_expire(ctx, 0); |
|
aac79fc948cc
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Valentin Bartenev <vbart@nginx.com>
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changeset
|
444 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
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changeset
|
445 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>
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diff
changeset
|
446 if (node == NULL) { |
|
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
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5411
diff
changeset
|
447 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
|
448 "could not allocate node%s", ctx->shpool->log_ctx); |
|
4418
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
|
449 return NGX_ERROR; |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
450 } |
|
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
|
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 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
453 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
|
454 |
|
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
455 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
|
456 |
|
5863
102f85699420
Limit req: reduced number of parameters in the lookup function.
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5862
diff
changeset
|
457 lr->len = (u_short) key->len; |
|
4418
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Limit req: allocation and initialization of a new node moved to the lookup
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parents:
4417
diff
changeset
|
458 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
|
459 |
|
5863
102f85699420
Limit req: reduced number of parameters in the lookup function.
Valentin Bartenev <vbart@nginx.com>
parents:
5862
diff
changeset
|
460 ngx_memcpy(lr->data, key->data, key->len); |
|
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
461 |
|
4832
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
462 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
|
463 |
|
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
464 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
|
465 |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
466 if (account) { |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
467 lr->last = now; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
468 lr->count = 0; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
469 return NGX_OK; |
|
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 lr->last = 0; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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473 lr->count = 1; |
|
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474 |
|
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475 ctx->node = lr; |
|
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|
476 |
|
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477 return NGX_AGAIN; |
|
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478 } |
|
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479 |
|
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|
480 |
|
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|
481 static ngx_msec_t |
|
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482 ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, ngx_uint_t n, |
|
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483 ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit) |
|
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484 { |
|
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485 ngx_int_t excess; |
|
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486 ngx_time_t *tp; |
|
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487 ngx_msec_t now, delay, max_delay; |
|
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488 ngx_msec_int_t ms; |
|
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489 ngx_http_limit_req_ctx_t *ctx; |
|
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490 ngx_http_limit_req_node_t *lr; |
|
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|
491 |
|
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492 excess = *ep; |
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|
493 |
|
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494 if (excess == 0 || (*limit)->nodelay) { |
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495 max_delay = 0; |
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496 |
|
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497 } else { |
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498 ctx = (*limit)->shm_zone->data; |
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499 max_delay = excess * 1000 / ctx->rate; |
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500 } |
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501 |
|
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502 while (n--) { |
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503 ctx = limits[n].shm_zone->data; |
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504 lr = ctx->node; |
|
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505 |
|
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506 if (lr == NULL) { |
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507 continue; |
|
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508 } |
|
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|
509 |
|
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510 ngx_shmtx_lock(&ctx->shpool->mutex); |
|
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|
511 |
|
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512 tp = ngx_timeofday(); |
|
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513 |
|
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514 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
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515 ms = (ngx_msec_int_t) (now - lr->last); |
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516 |
|
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517 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
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518 |
|
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519 if (excess < 0) { |
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520 excess = 0; |
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521 } |
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522 |
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523 lr->last = now; |
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524 lr->excess = excess; |
|
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525 lr->count--; |
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526 |
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527 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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|
528 |
|
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|
529 ctx->node = NULL; |
|
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|
530 |
|
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|
531 if (limits[n].nodelay) { |
|
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532 continue; |
|
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|
533 } |
|
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|
534 |
|
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|
535 delay = excess * 1000 / ctx->rate; |
|
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Valentin Bartenev <vbart@nginx.com>
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|
536 |
|
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|
537 if (delay > max_delay) { |
|
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|
538 max_delay = delay; |
|
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|
539 *ep = excess; |
|
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|
540 *limit = &limits[n]; |
|
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Valentin Bartenev <vbart@nginx.com>
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|
541 } |
|
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Valentin Bartenev <vbart@nginx.com>
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|
542 } |
|
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Limit req: support for multiple "limit_req" limits.
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|
543 |
|
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Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
544 return max_delay; |
| 2294 | 545 } |
| 546 | |
| 547 | |
| 548 static void | |
| 549 ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, ngx_uint_t n) | |
| 550 { | |
| 2313 | 551 ngx_int_t excess; |
| 2294 | 552 ngx_time_t *tp; |
| 553 ngx_msec_t now; | |
| 554 ngx_queue_t *q; | |
| 555 ngx_msec_int_t ms; | |
| 556 ngx_rbtree_node_t *node; | |
|
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7b11f9a1bfe1
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parents:
2313
diff
changeset
|
557 ngx_http_limit_req_node_t *lr; |
| 2294 | 558 |
| 559 tp = ngx_timeofday(); | |
| 560 | |
| 561 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); | |
| 562 | |
| 563 /* | |
| 564 * n == 1 deletes one or two zero rate entries | |
| 565 * n == 0 deletes oldest entry by force | |
| 566 * and one or two zero rate entries | |
| 567 */ | |
| 568 | |
| 569 while (n < 3) { | |
| 570 | |
|
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|
571 if (ngx_queue_empty(&ctx->sh->queue)) { |
| 2294 | 572 return; |
| 573 } | |
| 574 | |
|
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|
575 q = ngx_queue_last(&ctx->sh->queue); |
| 2294 | 576 |
|
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diff
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|
577 lr = ngx_queue_data(q, ngx_http_limit_req_node_t, queue); |
| 2294 | 578 |
|
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changeset
|
579 if (lr->count) { |
|
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|
580 |
|
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Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
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|
581 /* |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
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diff
changeset
|
582 * There is not much sense in looking further, |
|
9ce48f9eb85b
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diff
changeset
|
583 * because we bump nodes on the lookup stage. |
|
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Valentin Bartenev <vbart@nginx.com>
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|
584 */ |
|
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Valentin Bartenev <vbart@nginx.com>
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diff
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|
585 |
|
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Limit req: support for multiple "limit_req" limits.
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|
586 return; |
|
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changeset
|
587 } |
|
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Limit req: support for multiple "limit_req" limits.
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diff
changeset
|
588 |
| 2294 | 589 if (n++ != 0) { |
| 590 | |
|
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changeset
|
591 ms = (ngx_msec_int_t) (now - lr->last); |
| 2294 | 592 ms = ngx_abs(ms); |
| 593 | |
| 594 if (ms < 60000) { | |
| 595 return; | |
| 596 } | |
| 597 | |
|
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diff
changeset
|
598 excess = lr->excess - ctx->rate * ms / 1000; |
| 2294 | 599 |
| 2313 | 600 if (excess > 0) { |
| 2294 | 601 return; |
| 602 } | |
| 603 } | |
| 604 | |
| 605 ngx_queue_remove(q); | |
| 606 | |
| 607 node = (ngx_rbtree_node_t *) | |
|
2374
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Igor Sysoev <igor@sysoev.ru>
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changeset
|
608 ((u_char *) lr - offsetof(ngx_rbtree_node_t, color)); |
| 2294 | 609 |
|
2720
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2716
diff
changeset
|
610 ngx_rbtree_delete(&ctx->sh->rbtree, node); |
| 2294 | 611 |
| 612 ngx_slab_free_locked(ctx->shpool, node); | |
| 613 } | |
| 980 | 614 } |
| 615 | |
| 616 | |
| 617 static ngx_int_t | |
| 2294 | 618 ngx_http_limit_req_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
| 980 | 619 { |
| 2294 | 620 ngx_http_limit_req_ctx_t *octx = data; |
|
993
1b9a4d92173f
pass the inherited shm_zone data
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parents:
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diff
changeset
|
621 |
|
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
622 size_t len; |
| 2294 | 623 ngx_http_limit_req_ctx_t *ctx; |
| 980 | 624 |
|
993
1b9a4d92173f
pass the inherited shm_zone data
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diff
changeset
|
625 ctx = shm_zone->data; |
|
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parents:
987
diff
changeset
|
626 |
|
1b9a4d92173f
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parents:
987
diff
changeset
|
627 if (octx) { |
|
5862
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Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
628 if (ctx->key.value.len != octx->key.value.len |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
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5846
diff
changeset
|
629 || ngx_strncmp(ctx->key.value.data, octx->key.value.data, |
|
ecbb99aa0e12
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Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
630 ctx->key.value.len) |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
631 != 0) |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
632 { |
|
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
633 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
|
5862
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Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
634 "limit_req \"%V\" uses the \"%V\" key " |
|
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Limit req: use complex value in limit_req_zone.
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parents:
5846
diff
changeset
|
635 "while previously it used the \"%V\" key", |
|
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Limit req: use complex value in limit_req_zone.
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parents:
5846
diff
changeset
|
636 &shm_zone->shm.name, &ctx->key.value, |
|
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Limit req: use complex value in limit_req_zone.
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diff
changeset
|
637 &octx->key.value); |
|
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
638 return NGX_ERROR; |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
639 } |
|
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
640 |
|
2720
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support attaching to an existent Win32 shared memory
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parents:
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diff
changeset
|
641 ctx->sh = octx->sh; |
| 2294 | 642 ctx->shpool = octx->shpool; |
|
993
1b9a4d92173f
pass the inherited shm_zone data
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parents:
987
diff
changeset
|
643 |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
644 return NGX_OK; |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
645 } |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
646 |
| 2294 | 647 ctx->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
| 980 | 648 |
|
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support attaching to an existent Win32 shared memory
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parents:
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diff
changeset
|
649 if (shm_zone->shm.exists) { |
|
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support attaching to an existent Win32 shared memory
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changeset
|
650 ctx->sh = ctx->shpool->data; |
|
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support attaching to an existent Win32 shared memory
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parents:
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diff
changeset
|
651 |
|
b3b8c66bd520
support attaching to an existent Win32 shared memory
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parents:
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diff
changeset
|
652 return NGX_OK; |
| 980 | 653 } |
| 654 | |
|
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parents:
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diff
changeset
|
655 ctx->sh = ngx_slab_alloc(ctx->shpool, sizeof(ngx_http_limit_req_shctx_t)); |
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diff
changeset
|
656 if (ctx->sh == NULL) { |
| 980 | 657 return NGX_ERROR; |
| 658 } | |
| 659 | |
|
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diff
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|
660 ctx->shpool->data = ctx->sh; |
|
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parents:
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diff
changeset
|
661 |
|
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parents:
2716
diff
changeset
|
662 ngx_rbtree_init(&ctx->sh->rbtree, &ctx->sh->sentinel, |
| 2294 | 663 ngx_http_limit_req_rbtree_insert_value); |
| 664 | |
|
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
665 ngx_queue_init(&ctx->sh->queue); |
| 980 | 666 |
|
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
667 len = sizeof(" in limit_req zone \"\"") + shm_zone->shm.name.len; |
|
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
668 |
|
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
669 ctx->shpool->log_ctx = ngx_slab_alloc(ctx->shpool, len); |
|
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improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
670 if (ctx->shpool->log_ctx == NULL) { |
|
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improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
671 return NGX_ERROR; |
|
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improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
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|
672 } |
|
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improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
673 |
|
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
674 ngx_sprintf(ctx->shpool->log_ctx, " in limit_req zone \"%V\"%Z", |
|
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
675 &shm_zone->shm.name); |
|
2611
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improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2376
diff
changeset
|
676 |
|
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5411
diff
changeset
|
677 ctx->shpool->log_nomem = 0; |
|
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5411
diff
changeset
|
678 |
| 980 | 679 return NGX_OK; |
| 680 } | |
| 681 | |
| 682 | |
| 683 static void * | |
| 2294 | 684 ngx_http_limit_req_create_conf(ngx_conf_t *cf) |
| 980 | 685 { |
| 2294 | 686 ngx_http_limit_req_conf_t *conf; |
| 980 | 687 |
| 2294 | 688 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_conf_t)); |
| 980 | 689 if (conf == NULL) { |
|
2912
c7d57b539248
return NULL instead of NGX_CONF_ERROR on a create conf failure
Igor Sysoev <igor@sysoev.ru>
parents:
2720
diff
changeset
|
690 return NULL; |
| 980 | 691 } |
| 692 | |
| 693 /* | |
| 694 * set by ngx_pcalloc(): | |
| 695 * | |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
696 * conf->limits.elts = NULL; |
| 980 | 697 */ |
| 698 | |
| 3185 | 699 conf->limit_log_level = NGX_CONF_UNSET_UINT; |
|
5117
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4832
diff
changeset
|
700 conf->status_code = NGX_CONF_UNSET_UINT; |
| 3185 | 701 |
| 980 | 702 return conf; |
| 703 } | |
| 704 | |
| 705 | |
| 706 static char * | |
| 2294 | 707 ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
| 980 | 708 { |
| 2294 | 709 ngx_http_limit_req_conf_t *prev = parent; |
| 710 ngx_http_limit_req_conf_t *conf = child; | |
| 980 | 711 |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
712 if (conf->limits.elts == NULL) { |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
713 conf->limits = prev->limits; |
| 980 | 714 } |
| 715 | |
| 3185 | 716 ngx_conf_merge_uint_value(conf->limit_log_level, prev->limit_log_level, |
| 717 NGX_LOG_ERR); | |
| 718 | |
| 719 conf->delay_log_level = (conf->limit_log_level == NGX_LOG_INFO) ? | |
| 720 NGX_LOG_INFO : conf->limit_log_level + 1; | |
| 721 | |
|
5117
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4832
diff
changeset
|
722 ngx_conf_merge_uint_value(conf->status_code, prev->status_code, |
|
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4832
diff
changeset
|
723 NGX_HTTP_SERVICE_UNAVAILABLE); |
|
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4832
diff
changeset
|
724 |
| 980 | 725 return NGX_CONF_OK; |
| 726 } | |
| 727 | |
| 728 | |
| 729 static char * | |
| 2294 | 730 ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| 980 | 731 { |
|
5862
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
732 u_char *p; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
733 size_t len; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
734 ssize_t size; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
735 ngx_str_t *value, name, s; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
736 ngx_int_t rate, scale; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
737 ngx_uint_t i; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
738 ngx_shm_zone_t *shm_zone; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
739 ngx_http_limit_req_ctx_t *ctx; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
740 ngx_http_compile_complex_value_t ccv; |
| 980 | 741 |
| 742 value = cf->args->elts; | |
| 743 | |
|
5862
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
744 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_ctx_t)); |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
745 if (ctx == NULL) { |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
746 return NGX_CONF_ERROR; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
747 } |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
748 |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
749 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
750 |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
751 ccv.cf = cf; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
752 ccv.value = &value[1]; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
753 ccv.complex_value = &ctx->key; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
754 |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
755 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
756 return NGX_CONF_ERROR; |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
757 } |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
758 |
| 2294 | 759 size = 0; |
| 760 rate = 1; | |
| 761 scale = 1; | |
| 762 name.len = 0; | |
| 763 | |
|
5862
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
764 for (i = 2; i < cf->args->nelts; i++) { |
| 2294 | 765 |
| 766 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
| 767 | |
| 768 name.data = value[i].data + 5; | |
| 769 | |
| 770 p = (u_char *) ngx_strchr(name.data, ':'); | |
| 771 | |
|
4417
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
772 if (p == NULL) { |
|
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]); |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
775 return NGX_CONF_ERROR; |
| 2294 | 776 } |
| 777 | |
|
4417
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
778 name.len = p - name.data; |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
779 |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
780 s.data = p + 1; |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
781 s.len = value[i].data + value[i].len - s.data; |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
782 |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
783 size = ngx_parse_size(&s); |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
784 |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
785 if (size == NGX_ERROR) { |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
786 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
|
787 "invalid zone size \"%V\"", &value[i]); |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
788 return NGX_CONF_ERROR; |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
789 } |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
790 |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
791 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
|
792 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
|
793 "zone \"%V\" is too small", &value[i]); |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
794 return NGX_CONF_ERROR; |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
795 } |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
796 |
|
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
797 continue; |
| 2294 | 798 } |
| 799 | |
| 800 if (ngx_strncmp(value[i].data, "rate=", 5) == 0) { | |
| 801 | |
| 802 len = value[i].len; | |
| 803 p = value[i].data + len - 3; | |
| 987 | 804 |
| 2294 | 805 if (ngx_strncmp(p, "r/s", 3) == 0) { |
| 806 scale = 1; | |
| 807 len -= 3; | |
| 808 | |
| 809 } else if (ngx_strncmp(p, "r/m", 3) == 0) { | |
| 810 scale = 60; | |
| 811 len -= 3; | |
| 812 } | |
| 813 | |
| 814 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
|
815 if (rate <= 0) { |
| 2294 | 816 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 817 "invalid rate \"%V\"", &value[i]); | |
| 818 return NGX_CONF_ERROR; | |
| 819 } | |
| 820 | |
| 821 continue; | |
| 822 } | |
| 823 | |
| 824 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 825 "invalid parameter \"%V\"", &value[i]); | |
| 987 | 826 return NGX_CONF_ERROR; |
| 827 } | |
| 828 | |
|
4417
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
829 if (name.len == 0) { |
| 2294 | 830 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 831 "\"%V\" must have \"zone\" parameter", | |
| 832 &cmd->name); | |
| 987 | 833 return NGX_CONF_ERROR; |
| 834 } | |
| 835 | |
| 2313 | 836 ctx->rate = rate * 1000 / scale; |
| 980 | 837 |
| 2294 | 838 shm_zone = ngx_shared_memory_add(cf, &name, size, |
| 839 &ngx_http_limit_req_module); | |
| 980 | 840 if (shm_zone == NULL) { |
| 841 return NGX_CONF_ERROR; | |
| 842 } | |
| 843 | |
| 987 | 844 if (shm_zone->data) { |
| 845 ctx = shm_zone->data; | |
| 846 | |
| 847 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
|
5862
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
848 "%V \"%V\" is already bound to key \"%V\"", |
|
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
5846
diff
changeset
|
849 &cmd->name, &name, &ctx->key.value); |
| 987 | 850 return NGX_CONF_ERROR; |
| 851 } | |
| 852 | |
| 2294 | 853 shm_zone->init = ngx_http_limit_req_init_zone; |
| 987 | 854 shm_zone->data = ctx; |
| 980 | 855 |
| 856 return NGX_CONF_OK; | |
| 857 } | |
| 858 | |
| 859 | |
| 860 static char * | |
| 2294 | 861 ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| 980 | 862 { |
|
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
parents:
2313
diff
changeset
|
863 ngx_http_limit_req_conf_t *lrcf = conf; |
| 980 | 864 |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
865 ngx_int_t burst; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
866 ngx_str_t *value, s; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
867 ngx_uint_t i, nodelay; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
868 ngx_shm_zone_t *shm_zone; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
869 ngx_http_limit_req_limit_t *limit, *limits; |
| 980 | 870 |
| 871 value = cf->args->elts; | |
| 872 | |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
873 shm_zone = NULL; |
| 2294 | 874 burst = 0; |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
875 nodelay = 0; |
| 2294 | 876 |
| 877 for (i = 1; i < cf->args->nelts; i++) { | |
| 878 | |
| 879 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
| 880 | |
| 881 s.len = value[i].len - 5; | |
| 882 s.data = value[i].data + 5; | |
| 883 | |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
884 shm_zone = ngx_shared_memory_add(cf, &s, 0, |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
885 &ngx_http_limit_req_module); |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
886 if (shm_zone == NULL) { |
| 2294 | 887 return NGX_CONF_ERROR; |
| 888 } | |
| 889 | |
| 890 continue; | |
| 891 } | |
| 892 | |
| 893 if (ngx_strncmp(value[i].data, "burst=", 6) == 0) { | |
| 894 | |
|
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
895 burst = ngx_atoi(value[i].data + 6, value[i].len - 6); |
| 2294 | 896 if (burst <= 0) { |
| 897 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 898 "invalid burst rate \"%V\"", &value[i]); | |
| 899 return NGX_CONF_ERROR; | |
| 900 } | |
| 901 | |
| 902 continue; | |
| 903 } | |
| 904 | |
|
5411
5483d9e77b32
Limit req: fixed "nodelay" parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5166
diff
changeset
|
905 if (ngx_strcmp(value[i].data, "nodelay") == 0) { |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
906 nodelay = 1; |
| 2294 | 907 continue; |
| 908 } | |
| 909 | |
| 910 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 911 "invalid parameter \"%V\"", &value[i]); | |
| 980 | 912 return NGX_CONF_ERROR; |
| 913 } | |
| 914 | |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
915 if (shm_zone == NULL) { |
| 980 | 916 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 2294 | 917 "\"%V\" must have \"zone\" parameter", |
| 918 &cmd->name); | |
| 980 | 919 return NGX_CONF_ERROR; |
| 920 } | |
| 921 | |
|
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
922 limits = lrcf->limits.elts; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
923 |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
924 if (limits == NULL) { |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
925 if (ngx_array_init(&lrcf->limits, cf->pool, 1, |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
926 sizeof(ngx_http_limit_req_limit_t)) |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
927 != NGX_OK) |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
928 { |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
929 return NGX_CONF_ERROR; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
930 } |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
931 } |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
932 |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
933 for (i = 0; i < lrcf->limits.nelts; i++) { |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
934 if (shm_zone == limits[i].shm_zone) { |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
935 return "is duplicate"; |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
936 } |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
937 } |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
938 |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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>
parents:
4499
diff
changeset
|
940 if (limit == NULL) { |
|
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
parents:
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
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
943 |
|
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
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 } |