Mercurial > hg > nginx
annotate src/http/modules/ngx_http_memcached_module.c @ 4121:16c60162c35b
Keepalive support in memcached.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 15 Sep 2011 19:04:25 +0000 |
| parents | dbddec65fdab |
| children | d620f497c50f |
| rev | line source |
|---|---|
| 581 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_http.h> | |
| 10 | |
| 11 | |
| 12 typedef struct { | |
| 13 ngx_http_upstream_conf_t upstream; | |
| 1076 | 14 ngx_int_t index; |
| 581 | 15 } ngx_http_memcached_loc_conf_t; |
| 16 | |
| 17 | |
| 18 typedef struct { | |
| 19 size_t rest; | |
| 20 ngx_http_request_t *request; | |
| 597 | 21 ngx_str_t key; |
| 581 | 22 } ngx_http_memcached_ctx_t; |
| 23 | |
| 24 | |
| 25 static ngx_int_t ngx_http_memcached_create_request(ngx_http_request_t *r); | |
| 26 static ngx_int_t ngx_http_memcached_reinit_request(ngx_http_request_t *r); | |
| 27 static ngx_int_t ngx_http_memcached_process_header(ngx_http_request_t *r); | |
| 28 static ngx_int_t ngx_http_memcached_filter_init(void *data); | |
| 29 static ngx_int_t ngx_http_memcached_filter(void *data, ssize_t bytes); | |
| 30 static void ngx_http_memcached_abort_request(ngx_http_request_t *r); | |
| 31 static void ngx_http_memcached_finalize_request(ngx_http_request_t *r, | |
| 32 ngx_int_t rc); | |
| 33 | |
| 34 static void *ngx_http_memcached_create_loc_conf(ngx_conf_t *cf); | |
| 35 static char *ngx_http_memcached_merge_loc_conf(ngx_conf_t *cf, | |
| 36 void *parent, void *child); | |
| 37 | |
| 38 static char *ngx_http_memcached_pass(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 39 void *conf); | |
| 40 | |
| 41 | |
| 42 static ngx_conf_bitmask_t ngx_http_memcached_next_upstream_masks[] = { | |
| 43 { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR }, | |
| 44 { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT }, | |
| 45 { ngx_string("invalid_response"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER }, | |
| 46 { ngx_string("not_found"), NGX_HTTP_UPSTREAM_FT_HTTP_404 }, | |
| 665 | 47 { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF }, |
| 581 | 48 { ngx_null_string, 0 } |
| 49 }; | |
| 50 | |
| 51 | |
| 52 static ngx_command_t ngx_http_memcached_commands[] = { | |
| 53 | |
| 54 { ngx_string("memcached_pass"), | |
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55 NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1, |
| 581 | 56 ngx_http_memcached_pass, |
| 57 NGX_HTTP_LOC_CONF_OFFSET, | |
| 58 0, | |
| 59 NULL }, | |
| 60 | |
|
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61 { ngx_string("memcached_bind"), |
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62 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
| 3399 | 63 ngx_http_upstream_bind_set_slot, |
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64 NGX_HTTP_LOC_CONF_OFFSET, |
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65 offsetof(ngx_http_memcached_loc_conf_t, upstream.local), |
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66 NULL }, |
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67 |
| 581 | 68 { ngx_string("memcached_connect_timeout"), |
| 69 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 70 ngx_conf_set_msec_slot, | |
| 71 NGX_HTTP_LOC_CONF_OFFSET, | |
| 72 offsetof(ngx_http_memcached_loc_conf_t, upstream.connect_timeout), | |
| 73 NULL }, | |
| 74 | |
| 75 { ngx_string("memcached_send_timeout"), | |
| 76 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 77 ngx_conf_set_msec_slot, | |
| 78 NGX_HTTP_LOC_CONF_OFFSET, | |
| 79 offsetof(ngx_http_memcached_loc_conf_t, upstream.send_timeout), | |
| 80 NULL }, | |
| 81 | |
| 82 { ngx_string("memcached_buffer_size"), | |
| 83 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 84 ngx_conf_set_size_slot, | |
| 85 NGX_HTTP_LOC_CONF_OFFSET, | |
| 86 offsetof(ngx_http_memcached_loc_conf_t, upstream.buffer_size), | |
| 87 NULL }, | |
| 88 | |
| 89 { ngx_string("memcached_read_timeout"), | |
| 90 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 91 ngx_conf_set_msec_slot, | |
| 92 NGX_HTTP_LOC_CONF_OFFSET, | |
| 93 offsetof(ngx_http_memcached_loc_conf_t, upstream.read_timeout), | |
| 94 NULL }, | |
| 95 | |
| 96 { ngx_string("memcached_next_upstream"), | |
| 97 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, | |
| 98 ngx_conf_set_bitmask_slot, | |
| 99 NGX_HTTP_LOC_CONF_OFFSET, | |
| 100 offsetof(ngx_http_memcached_loc_conf_t, upstream.next_upstream), | |
| 101 &ngx_http_memcached_next_upstream_masks }, | |
| 102 | |
| 103 ngx_null_command | |
| 104 }; | |
| 105 | |
| 106 | |
| 667 | 107 static ngx_http_module_t ngx_http_memcached_module_ctx = { |
| 581 | 108 NULL, /* preconfiguration */ |
| 109 NULL, /* postconfiguration */ | |
| 110 | |
| 111 NULL, /* create main configuration */ | |
| 112 NULL, /* init main configuration */ | |
| 113 | |
| 114 NULL, /* create server configuration */ | |
| 115 NULL, /* merge server configuration */ | |
| 116 | |
| 117 ngx_http_memcached_create_loc_conf, /* create location configration */ | |
| 118 ngx_http_memcached_merge_loc_conf /* merge location configration */ | |
| 119 }; | |
| 120 | |
| 121 | |
| 122 ngx_module_t ngx_http_memcached_module = { | |
| 123 NGX_MODULE_V1, | |
| 124 &ngx_http_memcached_module_ctx, /* module context */ | |
| 125 ngx_http_memcached_commands, /* module directives */ | |
| 126 NGX_HTTP_MODULE, /* module type */ | |
| 127 NULL, /* init master */ | |
| 128 NULL, /* init module */ | |
| 129 NULL, /* init process */ | |
| 130 NULL, /* init thread */ | |
| 131 NULL, /* exit thread */ | |
| 132 NULL, /* exit process */ | |
| 133 NULL, /* exit master */ | |
| 134 NGX_MODULE_V1_PADDING | |
| 135 }; | |
| 136 | |
| 137 | |
| 1076 | 138 static ngx_str_t ngx_http_memcached_key = ngx_string("memcached_key"); |
| 139 | |
| 140 | |
| 581 | 141 #define NGX_HTTP_MEMCACHED_END (sizeof(ngx_http_memcached_end) - 1) |
| 142 static u_char ngx_http_memcached_end[] = CRLF "END" CRLF; | |
| 143 | |
| 144 | |
| 145 static ngx_int_t | |
| 146 ngx_http_memcached_handler(ngx_http_request_t *r) | |
| 147 { | |
| 148 ngx_int_t rc; | |
| 149 ngx_http_upstream_t *u; | |
| 150 ngx_http_memcached_ctx_t *ctx; | |
| 151 ngx_http_memcached_loc_conf_t *mlcf; | |
| 152 | |
| 645 | 153 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) { |
| 581 | 154 return NGX_HTTP_NOT_ALLOWED; |
| 155 } | |
| 156 | |
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157 rc = ngx_http_discard_request_body(r); |
| 581 | 158 |
| 1374 | 159 if (rc != NGX_OK) { |
| 581 | 160 return rc; |
| 161 } | |
| 162 | |
| 163 if (ngx_http_set_content_type(r) != NGX_OK) { | |
| 164 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 165 } | |
| 166 | |
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167 if (ngx_http_upstream_create(r) != NGX_OK) { |
| 581 | 168 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 169 } | |
| 170 | |
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171 u = r->upstream; |
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172 |
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173 ngx_str_set(&u->schema, "memcached://"); |
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174 u->output.tag = (ngx_buf_tag_t) &ngx_http_memcached_module; |
| 581 | 175 |
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176 mlcf = ngx_http_get_module_loc_conf(r, ngx_http_memcached_module); |
| 581 | 177 |
| 178 u->conf = &mlcf->upstream; | |
| 179 | |
| 180 u->create_request = ngx_http_memcached_create_request; | |
| 181 u->reinit_request = ngx_http_memcached_reinit_request; | |
| 182 u->process_header = ngx_http_memcached_process_header; | |
| 183 u->abort_request = ngx_http_memcached_abort_request; | |
| 184 u->finalize_request = ngx_http_memcached_finalize_request; | |
| 185 | |
| 186 ctx = ngx_palloc(r->pool, sizeof(ngx_http_memcached_ctx_t)); | |
| 187 if (ctx == NULL) { | |
| 188 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 189 } | |
| 190 | |
| 191 ctx->rest = NGX_HTTP_MEMCACHED_END; | |
| 192 ctx->request = r; | |
| 193 | |
| 597 | 194 ngx_http_set_ctx(r, ctx, ngx_http_memcached_module); |
| 195 | |
| 581 | 196 u->input_filter_init = ngx_http_memcached_filter_init; |
| 197 u->input_filter = ngx_http_memcached_filter; | |
| 198 u->input_filter_ctx = ctx; | |
| 199 | |
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200 r->main->count++; |
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201 |
| 581 | 202 ngx_http_upstream_init(r); |
| 203 | |
| 204 return NGX_DONE; | |
| 205 } | |
| 206 | |
| 207 | |
| 208 static ngx_int_t | |
| 209 ngx_http_memcached_create_request(ngx_http_request_t *r) | |
| 210 { | |
| 1076 | 211 size_t len; |
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212 uintptr_t escape; |
| 1076 | 213 ngx_buf_t *b; |
| 214 ngx_chain_t *cl; | |
| 215 ngx_http_memcached_ctx_t *ctx; | |
| 216 ngx_http_variable_value_t *vv; | |
| 217 ngx_http_memcached_loc_conf_t *mlcf; | |
| 218 | |
| 219 mlcf = ngx_http_get_module_loc_conf(r, ngx_http_memcached_module); | |
| 581 | 220 |
| 1076 | 221 vv = ngx_http_get_indexed_variable(r, mlcf->index); |
| 222 | |
| 223 if (vv == NULL || vv->not_found || vv->len == 0) { | |
| 224 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 225 "the \"$memcached_key\" variable is not set"); | |
| 226 return NGX_ERROR; | |
| 227 } | |
| 228 | |
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229 escape = 2 * ngx_escape_uri(NULL, vv->data, vv->len, NGX_ESCAPE_MEMCACHED); |
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230 |
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231 len = sizeof("get ") - 1 + vv->len + escape + sizeof(CRLF) - 1; |
| 581 | 232 |
| 233 b = ngx_create_temp_buf(r->pool, len); | |
| 234 if (b == NULL) { | |
| 235 return NGX_ERROR; | |
| 236 } | |
| 237 | |
| 238 cl = ngx_alloc_chain_link(r->pool); | |
| 239 if (cl == NULL) { | |
| 240 return NGX_ERROR; | |
| 241 } | |
| 242 | |
| 243 cl->buf = b; | |
| 244 cl->next = NULL; | |
| 245 | |
| 246 r->upstream->request_bufs = cl; | |
| 247 | |
| 248 *b->last++ = 'g'; *b->last++ = 'e'; *b->last++ = 't'; *b->last++ = ' '; | |
| 249 | |
| 597 | 250 ctx = ngx_http_get_module_ctx(r, ngx_http_memcached_module); |
| 251 | |
| 252 ctx->key.data = b->last; | |
| 253 | |
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254 if (escape == 0) { |
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255 b->last = ngx_copy(b->last, vv->data, vv->len); |
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256 |
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257 } else { |
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258 b->last = (u_char *) ngx_escape_uri(b->last, vv->data, vv->len, |
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259 NGX_ESCAPE_MEMCACHED); |
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260 } |
| 581 | 261 |
| 597 | 262 ctx->key.len = b->last - ctx->key.data; |
| 581 | 263 |
| 264 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 597 | 265 "http memcached request: \"%V\"", &ctx->key); |
| 581 | 266 |
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267 *b->last++ = CR; *b->last++ = LF; |
| 581 | 268 |
| 269 return NGX_OK; | |
| 270 } | |
| 271 | |
| 272 | |
| 273 static ngx_int_t | |
| 274 ngx_http_memcached_reinit_request(ngx_http_request_t *r) | |
| 275 { | |
| 276 return NGX_OK; | |
| 277 } | |
| 278 | |
| 279 | |
| 280 static ngx_int_t | |
| 281 ngx_http_memcached_process_header(ngx_http_request_t *r) | |
| 282 { | |
| 597 | 283 u_char *p, *len; |
| 284 ngx_str_t line; | |
| 285 ngx_http_upstream_t *u; | |
| 286 ngx_http_memcached_ctx_t *ctx; | |
| 581 | 287 |
| 288 u = r->upstream; | |
| 289 | |
| 290 for (p = u->buffer.pos; p < u->buffer.last; p++) { | |
| 291 if (*p == LF) { | |
| 292 goto found; | |
| 293 } | |
| 294 } | |
| 295 | |
| 296 return NGX_AGAIN; | |
| 297 | |
| 298 found: | |
| 299 | |
| 300 *p = '\0'; | |
| 301 | |
| 302 line.len = p - u->buffer.pos - 1; | |
| 303 line.data = u->buffer.pos; | |
| 304 | |
| 305 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 306 "memcached: \"%V\"", &line); | |
| 307 | |
| 308 p = u->buffer.pos; | |
| 309 | |
| 597 | 310 ctx = ngx_http_get_module_ctx(r, ngx_http_memcached_module); |
| 311 | |
| 581 | 312 if (ngx_strncmp(p, "VALUE ", sizeof("VALUE ") - 1) == 0) { |
| 313 | |
| 314 p += sizeof("VALUE ") - 1; | |
| 315 | |
| 597 | 316 if (ngx_strncmp(p, ctx->key.data, ctx->key.len) != 0) { |
| 581 | 317 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| 318 "memcached sent invalid key in response \"%V\" " | |
| 319 "for key \"%V\"", | |
| 597 | 320 &line, &ctx->key); |
| 581 | 321 |
| 322 return NGX_HTTP_UPSTREAM_INVALID_HEADER; | |
| 323 } | |
| 324 | |
| 597 | 325 p += ctx->key.len; |
| 581 | 326 |
| 327 if (*p++ != ' ') { | |
| 328 goto no_valid; | |
| 329 } | |
| 330 | |
| 331 /* skip flags */ | |
| 332 | |
| 333 while (*p) { | |
| 334 if (*p++ == ' ') { | |
| 335 goto length; | |
| 336 } | |
| 337 } | |
| 338 | |
| 339 goto no_valid; | |
| 340 | |
| 341 length: | |
| 342 | |
| 343 len = p; | |
| 344 | |
| 345 while (*p && *p++ != CR) { /* void */ } | |
| 346 | |
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347 u->headers_in.content_length_n = ngx_atoof(len, p - len - 1); |
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348 if (u->headers_in.content_length_n == -1) { |
| 581 | 349 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| 350 "memcached sent invalid length in response \"%V\" " | |
| 351 "for key \"%V\"", | |
| 597 | 352 &line, &ctx->key); |
| 581 | 353 return NGX_HTTP_UPSTREAM_INVALID_HEADER; |
| 354 } | |
| 355 | |
| 356 u->headers_in.status_n = 200; | |
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357 u->state->status = 200; |
| 581 | 358 u->buffer.pos = p + 1; |
| 359 | |
| 360 return NGX_OK; | |
| 361 } | |
| 362 | |
| 363 if (ngx_strcmp(p, "END\x0d") == 0) { | |
| 364 ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, | |
| 597 | 365 "key: \"%V\" was not found by memcached", &ctx->key); |
| 581 | 366 |
| 367 u->headers_in.status_n = 404; | |
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368 u->state->status = 404; |
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369 u->keepalive = 1; |
| 581 | 370 |
| 371 return NGX_OK; | |
| 372 } | |
| 373 | |
| 374 no_valid: | |
| 375 | |
| 376 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 377 "memcached sent invalid response: \"%V\"", &line); | |
| 378 | |
| 379 return NGX_HTTP_UPSTREAM_INVALID_HEADER; | |
| 380 } | |
| 381 | |
| 382 | |
| 383 static ngx_int_t | |
| 384 ngx_http_memcached_filter_init(void *data) | |
| 385 { | |
| 386 ngx_http_memcached_ctx_t *ctx = data; | |
| 387 | |
| 388 ngx_http_upstream_t *u; | |
| 389 | |
| 390 u = ctx->request->upstream; | |
| 391 | |
| 392 u->length += NGX_HTTP_MEMCACHED_END; | |
| 393 | |
| 394 return NGX_OK; | |
| 395 } | |
| 396 | |
| 397 | |
| 398 static ngx_int_t | |
| 399 ngx_http_memcached_filter(void *data, ssize_t bytes) | |
| 400 { | |
| 401 ngx_http_memcached_ctx_t *ctx = data; | |
| 402 | |
| 403 u_char *last; | |
| 404 ngx_buf_t *b; | |
| 405 ngx_chain_t *cl, **ll; | |
| 406 ngx_http_upstream_t *u; | |
| 407 | |
| 408 u = ctx->request->upstream; | |
| 409 b = &u->buffer; | |
| 410 | |
|
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411 if (u->length == (ssize_t) ctx->rest) { |
| 581 | 412 |
| 413 if (ngx_strncmp(b->last, | |
| 1548 | 414 ngx_http_memcached_end + NGX_HTTP_MEMCACHED_END - ctx->rest, |
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415 bytes) |
| 1548 | 416 != 0) |
| 581 | 417 { |
| 418 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0, | |
| 419 "memcached sent invalid trailer"); | |
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420 |
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421 u->length = 0; |
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422 ctx->rest = 0; |
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423 |
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424 return NGX_OK; |
| 581 | 425 } |
| 426 | |
|
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427 u->length -= bytes; |
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428 ctx->rest -= bytes; |
| 581 | 429 |
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430 if (u->length == 0) { |
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431 u->keepalive = 1; |
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432 } |
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433 |
| 581 | 434 return NGX_OK; |
| 435 } | |
| 436 | |
| 437 for (cl = u->out_bufs, ll = &u->out_bufs; cl; cl = cl->next) { | |
| 438 ll = &cl->next; | |
| 439 } | |
| 440 | |
| 441 cl = ngx_chain_get_free_buf(ctx->request->pool, &u->free_bufs); | |
| 442 if (cl == NULL) { | |
| 443 return NGX_ERROR; | |
| 444 } | |
| 445 | |
| 446 cl->buf->flush = 1; | |
| 447 cl->buf->memory = 1; | |
| 448 | |
| 449 *ll = cl; | |
| 450 | |
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451 last = b->last; |
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452 cl->buf->pos = last; |
| 581 | 453 b->last += bytes; |
| 454 cl->buf->last = b->last; | |
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455 cl->buf->tag = u->output.tag; |
| 581 | 456 |
| 457 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
| 458 "memcached filter bytes:%z size:%z length:%z rest:%z", | |
| 459 bytes, b->last - b->pos, u->length, ctx->rest); | |
| 460 | |
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461 if (bytes <= (ssize_t) (u->length - NGX_HTTP_MEMCACHED_END)) { |
| 581 | 462 u->length -= bytes; |
| 463 return NGX_OK; | |
| 464 } | |
| 465 | |
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466 last += u->length - NGX_HTTP_MEMCACHED_END; |
| 581 | 467 |
| 468 if (ngx_strncmp(last, ngx_http_memcached_end, b->last - last) != 0) { | |
| 469 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0, | |
| 470 "memcached sent invalid trailer"); | |
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471 |
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472 b->last = last; |
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473 cl->buf->last = last; |
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474 u->length = 0; |
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475 ctx->rest = 0; |
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476 |
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477 return NGX_OK; |
| 581 | 478 } |
| 479 | |
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480 ctx->rest -= b->last - last; |
| 581 | 481 b->last = last; |
| 482 cl->buf->last = last; | |
| 483 u->length = ctx->rest; | |
| 484 | |
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485 if (u->length == 0) { |
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486 u->keepalive = 1; |
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487 } |
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488 |
| 581 | 489 return NGX_OK; |
| 490 } | |
| 491 | |
| 492 | |
| 493 static void | |
| 494 ngx_http_memcached_abort_request(ngx_http_request_t *r) | |
| 495 { | |
| 496 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 497 "abort http memcached request"); | |
| 498 return; | |
| 499 } | |
| 500 | |
| 501 | |
| 502 static void | |
| 503 ngx_http_memcached_finalize_request(ngx_http_request_t *r, ngx_int_t rc) | |
| 504 { | |
| 505 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 506 "finalize http memcached request"); | |
| 507 return; | |
| 508 } | |
| 509 | |
| 510 | |
| 511 static void * | |
| 512 ngx_http_memcached_create_loc_conf(ngx_conf_t *cf) | |
| 513 { | |
| 514 ngx_http_memcached_loc_conf_t *conf; | |
| 515 | |
| 516 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_memcached_loc_conf_t)); | |
| 517 if (conf == NULL) { | |
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518 return NULL; |
| 581 | 519 } |
| 520 | |
| 521 /* | |
| 522 * set by ngx_pcalloc(): | |
| 523 * | |
| 524 * conf->upstream.bufs.num = 0; | |
| 525 * conf->upstream.next_upstream = 0; | |
| 526 * conf->upstream.temp_path = NULL; | |
| 527 * conf->upstream.uri = { 0, NULL }; | |
| 528 * conf->upstream.location = NULL; | |
| 529 */ | |
| 530 | |
| 531 conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC; | |
| 532 conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC; | |
| 533 conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC; | |
| 534 | |
| 535 conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE; | |
| 536 | |
| 884 | 537 /* the hardcoded values */ |
| 581 | 538 conf->upstream.cyclic_temp_file = 0; |
| 629 | 539 conf->upstream.buffering = 0; |
| 540 conf->upstream.ignore_client_abort = 0; | |
| 581 | 541 conf->upstream.send_lowat = 0; |
| 542 conf->upstream.bufs.num = 0; | |
| 543 conf->upstream.busy_buffers_size = 0; | |
| 544 conf->upstream.max_temp_file_size = 0; | |
| 545 conf->upstream.temp_file_write_size = 0; | |
| 657 | 546 conf->upstream.intercept_errors = 1; |
| 675 | 547 conf->upstream.intercept_404 = 1; |
| 581 | 548 conf->upstream.pass_request_headers = 0; |
| 549 conf->upstream.pass_request_body = 0; | |
| 550 | |
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551 conf->index = NGX_CONF_UNSET; |
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552 |
| 581 | 553 return conf; |
| 554 } | |
| 555 | |
| 556 | |
| 557 static char * | |
| 558 ngx_http_memcached_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 559 { | |
| 560 ngx_http_memcached_loc_conf_t *prev = parent; | |
| 561 ngx_http_memcached_loc_conf_t *conf = child; | |
| 562 | |
| 563 ngx_conf_merge_msec_value(conf->upstream.connect_timeout, | |
| 564 prev->upstream.connect_timeout, 60000); | |
| 565 | |
| 566 ngx_conf_merge_msec_value(conf->upstream.send_timeout, | |
| 567 prev->upstream.send_timeout, 60000); | |
| 568 | |
| 569 ngx_conf_merge_msec_value(conf->upstream.read_timeout, | |
| 570 prev->upstream.read_timeout, 60000); | |
| 571 | |
| 572 ngx_conf_merge_size_value(conf->upstream.buffer_size, | |
| 573 prev->upstream.buffer_size, | |
| 574 (size_t) ngx_pagesize); | |
| 575 | |
| 576 ngx_conf_merge_bitmask_value(conf->upstream.next_upstream, | |
| 577 prev->upstream.next_upstream, | |
| 578 (NGX_CONF_BITMASK_SET | |
| 579 |NGX_HTTP_UPSTREAM_FT_ERROR | |
| 580 |NGX_HTTP_UPSTREAM_FT_TIMEOUT)); | |
| 581 | |
| 665 | 582 if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) { |
| 583 conf->upstream.next_upstream = NGX_CONF_BITMASK_SET | |
| 584 |NGX_HTTP_UPSTREAM_FT_OFF; | |
| 585 } | |
| 586 | |
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587 if (conf->upstream.upstream == NULL) { |
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588 conf->upstream.upstream = prev->upstream.upstream; |
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589 } |
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590 |
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591 if (conf->index == NGX_CONF_UNSET) { |
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592 conf->index = prev->index; |
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593 } |
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594 |
| 581 | 595 return NGX_CONF_OK; |
| 596 } | |
| 597 | |
| 598 | |
| 599 static char * | |
| 600 ngx_http_memcached_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 601 { | |
| 2392 | 602 ngx_http_memcached_loc_conf_t *mlcf = conf; |
| 581 | 603 |
| 604 ngx_str_t *value; | |
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605 ngx_url_t u; |
| 581 | 606 ngx_http_core_loc_conf_t *clcf; |
| 607 | |
| 2392 | 608 if (mlcf->upstream.upstream) { |
| 581 | 609 return "is duplicate"; |
| 610 } | |
| 611 | |
| 612 value = cf->args->elts; | |
| 613 | |
|
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614 ngx_memzero(&u, sizeof(ngx_url_t)); |
| 581 | 615 |
|
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616 u.url = value[1]; |
| 884 | 617 u.no_resolve = 1; |
|
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618 |
| 2392 | 619 mlcf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0); |
| 620 if (mlcf->upstream.upstream == NULL) { | |
| 884 | 621 return NGX_CONF_ERROR; |
| 581 | 622 } |
| 623 | |
| 624 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); | |
| 625 | |
| 626 clcf->handler = ngx_http_memcached_handler; | |
| 627 | |
| 628 if (clcf->name.data[clcf->name.len - 1] == '/') { | |
| 629 clcf->auto_redirect = 1; | |
| 630 } | |
| 631 | |
| 2392 | 632 mlcf->index = ngx_http_get_variable_index(cf, &ngx_http_memcached_key); |
| 1076 | 633 |
| 2392 | 634 if (mlcf->index == NGX_ERROR) { |
| 1076 | 635 return NGX_CONF_ERROR; |
| 636 } | |
| 637 | |
| 581 | 638 return NGX_CONF_OK; |
| 639 } |