1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10 #include <ngx_http.h>
11
12
13 typedef struct {
14 ngx_http_upstream_conf_t upstream;
15 ngx_int_t index;
16 ngx_uint_t gzip_flag;
17 } ngx_http_memcached_loc_conf_t;
18
19
20 typedef struct {
21 size_t rest;
22 ngx_http_request_t *request;
23 ngx_str_t key;
24 } ngx_http_memcached_ctx_t;
25
26
27 static ngx_int_t ngx_http_memcached_create_request(ngx_http_request_t *r);
28 static ngx_int_t ngx_http_memcached_reinit_request(ngx_http_request_t *r);
29 static ngx_int_t ngx_http_memcached_process_header(ngx_http_request_t *r);
30 static ngx_int_t ngx_http_memcached_filter_init(void *data);
31 static ngx_int_t ngx_http_memcached_filter(void *data, ssize_t bytes);
32 static void ngx_http_memcached_abort_request(ngx_http_request_t *r);
33 static void ngx_http_memcached_finalize_request(ngx_http_request_t *r,
34 ngx_int_t rc);
35
36 static void *ngx_http_memcached_create_loc_conf(ngx_conf_t *cf);
37 static char *ngx_http_memcached_merge_loc_conf(ngx_conf_t *cf,
38 void *parent, void *child);
39
40 static char *ngx_http_memcached_pass(ngx_conf_t *cf, ngx_command_t *cmd,
41 void *conf);
42
43
44 static ngx_conf_bitmask_t ngx_http_memcached_next_upstream_masks[] = {
45 { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR },
46 { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
47 { ngx_string("invalid_response"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
48 { ngx_string("not_found"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
49 { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
50 { ngx_null_string, 0 }
51 };
52
53
54 static ngx_command_t ngx_http_memcached_commands[] = {
55
56 { ngx_string("memcached_pass"),
57 NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
58 ngx_http_memcached_pass,
59 NGX_HTTP_LOC_CONF_OFFSET,
60 0,
61 NULL },
62
63 { ngx_string("memcached_bind"),
64 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
65 ngx_http_upstream_bind_set_slot,
66 NGX_HTTP_LOC_CONF_OFFSET,
67 offsetof(ngx_http_memcached_loc_conf_t, upstream.local),
68 NULL },
69
70 { ngx_string("memcached_socket_keepalive"),
71 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
72 ngx_conf_set_flag_slot,
73 NGX_HTTP_LOC_CONF_OFFSET,
74 offsetof(ngx_http_memcached_loc_conf_t, upstream.socket_keepalive),
75 NULL },
76
77 { ngx_string("memcached_connect_timeout"),
78 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
79 ngx_conf_set_msec_slot,
80 NGX_HTTP_LOC_CONF_OFFSET,
81 offsetof(ngx_http_memcached_loc_conf_t, upstream.connect_timeout),
82 NULL },
83
84 { ngx_string("memcached_send_timeout"),
85 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
86 ngx_conf_set_msec_slot,
87 NGX_HTTP_LOC_CONF_OFFSET,
88 offsetof(ngx_http_memcached_loc_conf_t, upstream.send_timeout),
89 NULL },
90
91 { ngx_string("memcached_buffer_size"),
92 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
93 ngx_conf_set_size_slot,
94 NGX_HTTP_LOC_CONF_OFFSET,
95 offsetof(ngx_http_memcached_loc_conf_t, upstream.buffer_size),
96 NULL },
97
98 { ngx_string("memcached_read_timeout"),
99 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
100 ngx_conf_set_msec_slot,
101 NGX_HTTP_LOC_CONF_OFFSET,
102 offsetof(ngx_http_memcached_loc_conf_t, upstream.read_timeout),
103 NULL },
104
105 { ngx_string("memcached_next_upstream"),
106 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
107 ngx_conf_set_bitmask_slot,
108 NGX_HTTP_LOC_CONF_OFFSET,
109 offsetof(ngx_http_memcached_loc_conf_t, upstream.next_upstream),
110 &ngx_http_memcached_next_upstream_masks },
111
112 { ngx_string("memcached_next_upstream_tries"),
113 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
114 ngx_conf_set_num_slot,
115 NGX_HTTP_LOC_CONF_OFFSET,
116 offsetof(ngx_http_memcached_loc_conf_t, upstream.next_upstream_tries),
117 NULL },
118
119 { ngx_string("memcached_next_upstream_timeout"),
120 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
121 ngx_conf_set_msec_slot,
122 NGX_HTTP_LOC_CONF_OFFSET,
123 offsetof(ngx_http_memcached_loc_conf_t, upstream.next_upstream_timeout),
124 NULL },
125
126 { ngx_string("memcached_gzip_flag"),
127 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
128 ngx_conf_set_num_slot,
129 NGX_HTTP_LOC_CONF_OFFSET,
130 offsetof(ngx_http_memcached_loc_conf_t, gzip_flag),
131 NULL },
132
133 ngx_null_command
134 };
135
136
137 static ngx_http_module_t ngx_http_memcached_module_ctx = {
138 NULL, /* preconfiguration */
139 NULL, /* postconfiguration */
140
141 NULL, /* create main configuration */
142 NULL, /* init main configuration */
143
144 NULL, /* create server configuration */
145 NULL, /* merge server configuration */
146
147 ngx_http_memcached_create_loc_conf, /* create location configuration */
148 ngx_http_memcached_merge_loc_conf /* merge location configuration */
149 };
150
151
152 ngx_module_t ngx_http_memcached_module = {
153 NGX_MODULE_V1,
154 &ngx_http_memcached_module_ctx, /* module context */
155 ngx_http_memcached_commands, /* module directives */
156 NGX_HTTP_MODULE, /* module type */
157 NULL, /* init master */
158 NULL, /* init module */
159 NULL, /* init process */
160 NULL, /* init thread */
161 NULL, /* exit thread */
162 NULL, /* exit process */
163 NULL, /* exit master */
164 NGX_MODULE_V1_PADDING
165 };
166
167
168 static ngx_str_t ngx_http_memcached_key = ngx_string("memcached_key");
169
170
171 #define NGX_HTTP_MEMCACHED_END (sizeof(ngx_http_memcached_end) - 1)
172 static u_char ngx_http_memcached_end[] = CRLF "END" CRLF;
173
174
175 static ngx_int_t
ngx_http_memcached_handler(ngx_http_request_t * r)176 ngx_http_memcached_handler(ngx_http_request_t *r)
177 {
178 ngx_int_t rc;
179 ngx_http_upstream_t *u;
180 ngx_http_memcached_ctx_t *ctx;
181 ngx_http_memcached_loc_conf_t *mlcf;
182
183 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
184 return NGX_HTTP_NOT_ALLOWED;
185 }
186
187 rc = ngx_http_discard_request_body(r);
188
189 if (rc != NGX_OK) {
190 return rc;
191 }
192
193 if (ngx_http_set_content_type(r) != NGX_OK) {
194 return NGX_HTTP_INTERNAL_SERVER_ERROR;
195 }
196
197 if (ngx_http_upstream_create(r) != NGX_OK) {
198 return NGX_HTTP_INTERNAL_SERVER_ERROR;
199 }
200
201 u = r->upstream;
202
203 ngx_str_set(&u->schema, "memcached://");
204 u->output.tag = (ngx_buf_tag_t) &ngx_http_memcached_module;
205
206 mlcf = ngx_http_get_module_loc_conf(r, ngx_http_memcached_module);
207
208 u->conf = &mlcf->upstream;
209
210 u->create_request = ngx_http_memcached_create_request;
211 u->reinit_request = ngx_http_memcached_reinit_request;
212 u->process_header = ngx_http_memcached_process_header;
213 u->abort_request = ngx_http_memcached_abort_request;
214 u->finalize_request = ngx_http_memcached_finalize_request;
215
216 ctx = ngx_palloc(r->pool, sizeof(ngx_http_memcached_ctx_t));
217 if (ctx == NULL) {
218 return NGX_HTTP_INTERNAL_SERVER_ERROR;
219 }
220
221 ctx->request = r;
222
223 ngx_http_set_ctx(r, ctx, ngx_http_memcached_module);
224
225 u->input_filter_init = ngx_http_memcached_filter_init;
226 u->input_filter = ngx_http_memcached_filter;
227 u->input_filter_ctx = ctx;
228
229 r->main->count++;
230
231 ngx_http_upstream_init(r);
232
233 return NGX_DONE;
234 }
235
236
237 static ngx_int_t
ngx_http_memcached_create_request(ngx_http_request_t * r)238 ngx_http_memcached_create_request(ngx_http_request_t *r)
239 {
240 size_t len;
241 uintptr_t escape;
242 ngx_buf_t *b;
243 ngx_chain_t *cl;
244 ngx_http_memcached_ctx_t *ctx;
245 ngx_http_variable_value_t *vv;
246 ngx_http_memcached_loc_conf_t *mlcf;
247
248 mlcf = ngx_http_get_module_loc_conf(r, ngx_http_memcached_module);
249
250 vv = ngx_http_get_indexed_variable(r, mlcf->index);
251
252 if (vv == NULL || vv->not_found || vv->len == 0) {
253 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
254 "the \"$memcached_key\" variable is not set");
255 return NGX_ERROR;
256 }
257
258 escape = 2 * ngx_escape_uri(NULL, vv->data, vv->len, NGX_ESCAPE_MEMCACHED);
259
260 len = sizeof("get ") - 1 + vv->len + escape + sizeof(CRLF) - 1;
261
262 b = ngx_create_temp_buf(r->pool, len);
263 if (b == NULL) {
264 return NGX_ERROR;
265 }
266
267 cl = ngx_alloc_chain_link(r->pool);
268 if (cl == NULL) {
269 return NGX_ERROR;
270 }
271
272 cl->buf = b;
273 cl->next = NULL;
274
275 r->upstream->request_bufs = cl;
276
277 *b->last++ = 'g'; *b->last++ = 'e'; *b->last++ = 't'; *b->last++ = ' ';
278
279 ctx = ngx_http_get_module_ctx(r, ngx_http_memcached_module);
280
281 ctx->key.data = b->last;
282
283 if (escape == 0) {
284 b->last = ngx_copy(b->last, vv->data, vv->len);
285
286 } else {
287 b->last = (u_char *) ngx_escape_uri(b->last, vv->data, vv->len,
288 NGX_ESCAPE_MEMCACHED);
289 }
290
291 ctx->key.len = b->last - ctx->key.data;
292
293 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
294 "http memcached request: \"%V\"", &ctx->key);
295
296 *b->last++ = CR; *b->last++ = LF;
297
298 return NGX_OK;
299 }
300
301
302 static ngx_int_t
ngx_http_memcached_reinit_request(ngx_http_request_t * r)303 ngx_http_memcached_reinit_request(ngx_http_request_t *r)
304 {
305 return NGX_OK;
306 }
307
308
309 static ngx_int_t
ngx_http_memcached_process_header(ngx_http_request_t * r)310 ngx_http_memcached_process_header(ngx_http_request_t *r)
311 {
312 u_char *p, *start;
313 ngx_str_t line;
314 ngx_uint_t flags;
315 ngx_table_elt_t *h;
316 ngx_http_upstream_t *u;
317 ngx_http_memcached_ctx_t *ctx;
318 ngx_http_memcached_loc_conf_t *mlcf;
319
320 u = r->upstream;
321
322 for (p = u->buffer.pos; p < u->buffer.last; p++) {
323 if (*p == LF) {
324 goto found;
325 }
326 }
327
328 return NGX_AGAIN;
329
330 found:
331
332 line.data = u->buffer.pos;
333 line.len = p - u->buffer.pos;
334
335 if (line.len == 0 || *(p - 1) != CR) {
336 goto no_valid;
337 }
338
339 *p = '\0';
340 line.len--;
341
342 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
343 "memcached: \"%V\"", &line);
344
345 p = u->buffer.pos;
346
347 ctx = ngx_http_get_module_ctx(r, ngx_http_memcached_module);
348 mlcf = ngx_http_get_module_loc_conf(r, ngx_http_memcached_module);
349
350 if (ngx_strncmp(p, "VALUE ", sizeof("VALUE ") - 1) == 0) {
351
352 p += sizeof("VALUE ") - 1;
353
354 if (ngx_strncmp(p, ctx->key.data, ctx->key.len) != 0) {
355 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
356 "memcached sent invalid key in response \"%V\" "
357 "for key \"%V\"",
358 &line, &ctx->key);
359
360 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
361 }
362
363 p += ctx->key.len;
364
365 if (*p++ != ' ') {
366 goto no_valid;
367 }
368
369 /* flags */
370
371 start = p;
372
373 while (*p) {
374 if (*p++ == ' ') {
375 if (mlcf->gzip_flag) {
376 goto flags;
377 } else {
378 goto length;
379 }
380 }
381 }
382
383 goto no_valid;
384
385 flags:
386
387 flags = ngx_atoi(start, p - start - 1);
388
389 if (flags == (ngx_uint_t) NGX_ERROR) {
390 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
391 "memcached sent invalid flags in response \"%V\" "
392 "for key \"%V\"",
393 &line, &ctx->key);
394 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
395 }
396
397 if (flags & mlcf->gzip_flag) {
398 h = ngx_list_push(&r->headers_out.headers);
399 if (h == NULL) {
400 return NGX_ERROR;
401 }
402
403 h->hash = 1;
404 ngx_str_set(&h->key, "Content-Encoding");
405 ngx_str_set(&h->value, "gzip");
406 r->headers_out.content_encoding = h;
407 }
408
409 length:
410
411 start = p;
412 p = line.data + line.len;
413
414 u->headers_in.content_length_n = ngx_atoof(start, p - start);
415 if (u->headers_in.content_length_n == NGX_ERROR) {
416 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
417 "memcached sent invalid length in response \"%V\" "
418 "for key \"%V\"",
419 &line, &ctx->key);
420 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
421 }
422
423 u->headers_in.status_n = 200;
424 u->state->status = 200;
425 u->buffer.pos = p + sizeof(CRLF) - 1;
426
427 return NGX_OK;
428 }
429
430 if (ngx_strcmp(p, "END\x0d") == 0) {
431 ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
432 "key: \"%V\" was not found by memcached", &ctx->key);
433
434 u->headers_in.content_length_n = 0;
435 u->headers_in.status_n = 404;
436 u->state->status = 404;
437 u->buffer.pos = p + sizeof("END" CRLF) - 1;
438 u->keepalive = 1;
439
440 return NGX_OK;
441 }
442
443 no_valid:
444
445 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
446 "memcached sent invalid response: \"%V\"", &line);
447
448 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
449 }
450
451
452 static ngx_int_t
ngx_http_memcached_filter_init(void * data)453 ngx_http_memcached_filter_init(void *data)
454 {
455 ngx_http_memcached_ctx_t *ctx = data;
456
457 ngx_http_upstream_t *u;
458
459 u = ctx->request->upstream;
460
461 if (u->headers_in.status_n != 404) {
462 u->length = u->headers_in.content_length_n + NGX_HTTP_MEMCACHED_END;
463 ctx->rest = NGX_HTTP_MEMCACHED_END;
464
465 } else {
466 u->length = 0;
467 }
468
469 return NGX_OK;
470 }
471
472
473 static ngx_int_t
ngx_http_memcached_filter(void * data,ssize_t bytes)474 ngx_http_memcached_filter(void *data, ssize_t bytes)
475 {
476 ngx_http_memcached_ctx_t *ctx = data;
477
478 u_char *last;
479 ngx_buf_t *b;
480 ngx_chain_t *cl, **ll;
481 ngx_http_upstream_t *u;
482
483 u = ctx->request->upstream;
484 b = &u->buffer;
485
486 if (u->length == (ssize_t) ctx->rest) {
487
488 if (bytes > u->length
489 || ngx_strncmp(b->last,
490 ngx_http_memcached_end + NGX_HTTP_MEMCACHED_END - ctx->rest,
491 bytes)
492 != 0)
493 {
494 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0,
495 "memcached sent invalid trailer");
496
497 u->length = 0;
498 ctx->rest = 0;
499
500 return NGX_OK;
501 }
502
503 u->length -= bytes;
504 ctx->rest -= bytes;
505
506 if (u->length == 0) {
507 u->keepalive = 1;
508 }
509
510 return NGX_OK;
511 }
512
513 for (cl = u->out_bufs, ll = &u->out_bufs; cl; cl = cl->next) {
514 ll = &cl->next;
515 }
516
517 cl = ngx_chain_get_free_buf(ctx->request->pool, &u->free_bufs);
518 if (cl == NULL) {
519 return NGX_ERROR;
520 }
521
522 cl->buf->flush = 1;
523 cl->buf->memory = 1;
524
525 *ll = cl;
526
527 last = b->last;
528 cl->buf->pos = last;
529 b->last += bytes;
530 cl->buf->last = b->last;
531 cl->buf->tag = u->output.tag;
532
533 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
534 "memcached filter bytes:%z size:%z length:%O rest:%z",
535 bytes, b->last - b->pos, u->length, ctx->rest);
536
537 if (bytes <= (ssize_t) (u->length - NGX_HTTP_MEMCACHED_END)) {
538 u->length -= bytes;
539 return NGX_OK;
540 }
541
542 last += (size_t) (u->length - NGX_HTTP_MEMCACHED_END);
543
544 if (bytes > u->length
545 || ngx_strncmp(last, ngx_http_memcached_end, b->last - last) != 0)
546 {
547 ngx_log_error(NGX_LOG_ERR, ctx->request->connection->log, 0,
548 "memcached sent invalid trailer");
549
550 b->last = last;
551 cl->buf->last = last;
552 u->length = 0;
553 ctx->rest = 0;
554
555 return NGX_OK;
556 }
557
558 ctx->rest -= b->last - last;
559 b->last = last;
560 cl->buf->last = last;
561 u->length = ctx->rest;
562
563 if (u->length == 0) {
564 u->keepalive = 1;
565 }
566
567 return NGX_OK;
568 }
569
570
571 static void
ngx_http_memcached_abort_request(ngx_http_request_t * r)572 ngx_http_memcached_abort_request(ngx_http_request_t *r)
573 {
574 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
575 "abort http memcached request");
576 return;
577 }
578
579
580 static void
ngx_http_memcached_finalize_request(ngx_http_request_t * r,ngx_int_t rc)581 ngx_http_memcached_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
582 {
583 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
584 "finalize http memcached request");
585 return;
586 }
587
588
589 static void *
ngx_http_memcached_create_loc_conf(ngx_conf_t * cf)590 ngx_http_memcached_create_loc_conf(ngx_conf_t *cf)
591 {
592 ngx_http_memcached_loc_conf_t *conf;
593
594 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_memcached_loc_conf_t));
595 if (conf == NULL) {
596 return NULL;
597 }
598
599 /*
600 * set by ngx_pcalloc():
601 *
602 * conf->upstream.bufs.num = 0;
603 * conf->upstream.next_upstream = 0;
604 * conf->upstream.temp_path = NULL;
605 */
606
607 conf->upstream.local = NGX_CONF_UNSET_PTR;
608 conf->upstream.socket_keepalive = NGX_CONF_UNSET;
609 conf->upstream.next_upstream_tries = NGX_CONF_UNSET_UINT;
610 conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
611 conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
612 conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
613 conf->upstream.next_upstream_timeout = NGX_CONF_UNSET_MSEC;
614
615 conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE;
616
617 /* the hardcoded values */
618 conf->upstream.cyclic_temp_file = 0;
619 conf->upstream.buffering = 0;
620 conf->upstream.ignore_client_abort = 0;
621 conf->upstream.send_lowat = 0;
622 conf->upstream.bufs.num = 0;
623 conf->upstream.busy_buffers_size = 0;
624 conf->upstream.max_temp_file_size = 0;
625 conf->upstream.temp_file_write_size = 0;
626 conf->upstream.intercept_errors = 1;
627 conf->upstream.intercept_404 = 1;
628 conf->upstream.pass_request_headers = 0;
629 conf->upstream.pass_request_body = 0;
630 conf->upstream.force_ranges = 1;
631
632 conf->index = NGX_CONF_UNSET;
633 conf->gzip_flag = NGX_CONF_UNSET_UINT;
634
635 return conf;
636 }
637
638
639 static char *
ngx_http_memcached_merge_loc_conf(ngx_conf_t * cf,void * parent,void * child)640 ngx_http_memcached_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
641 {
642 ngx_http_memcached_loc_conf_t *prev = parent;
643 ngx_http_memcached_loc_conf_t *conf = child;
644
645 ngx_conf_merge_ptr_value(conf->upstream.local,
646 prev->upstream.local, NULL);
647
648 ngx_conf_merge_value(conf->upstream.socket_keepalive,
649 prev->upstream.socket_keepalive, 0);
650
651 ngx_conf_merge_uint_value(conf->upstream.next_upstream_tries,
652 prev->upstream.next_upstream_tries, 0);
653
654 ngx_conf_merge_msec_value(conf->upstream.connect_timeout,
655 prev->upstream.connect_timeout, 60000);
656
657 ngx_conf_merge_msec_value(conf->upstream.send_timeout,
658 prev->upstream.send_timeout, 60000);
659
660 ngx_conf_merge_msec_value(conf->upstream.read_timeout,
661 prev->upstream.read_timeout, 60000);
662
663 ngx_conf_merge_msec_value(conf->upstream.next_upstream_timeout,
664 prev->upstream.next_upstream_timeout, 0);
665
666 ngx_conf_merge_size_value(conf->upstream.buffer_size,
667 prev->upstream.buffer_size,
668 (size_t) ngx_pagesize);
669
670 ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
671 prev->upstream.next_upstream,
672 (NGX_CONF_BITMASK_SET
673 |NGX_HTTP_UPSTREAM_FT_ERROR
674 |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
675
676 if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
677 conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
678 |NGX_HTTP_UPSTREAM_FT_OFF;
679 }
680
681 if (conf->upstream.upstream == NULL) {
682 conf->upstream.upstream = prev->upstream.upstream;
683 }
684
685 if (conf->index == NGX_CONF_UNSET) {
686 conf->index = prev->index;
687 }
688
689 ngx_conf_merge_uint_value(conf->gzip_flag, prev->gzip_flag, 0);
690
691 return NGX_CONF_OK;
692 }
693
694
695 static char *
ngx_http_memcached_pass(ngx_conf_t * cf,ngx_command_t * cmd,void * conf)696 ngx_http_memcached_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
697 {
698 ngx_http_memcached_loc_conf_t *mlcf = conf;
699
700 ngx_str_t *value;
701 ngx_url_t u;
702 ngx_http_core_loc_conf_t *clcf;
703
704 if (mlcf->upstream.upstream) {
705 return "is duplicate";
706 }
707
708 value = cf->args->elts;
709
710 ngx_memzero(&u, sizeof(ngx_url_t));
711
712 u.url = value[1];
713 u.no_resolve = 1;
714
715 mlcf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0);
716 if (mlcf->upstream.upstream == NULL) {
717 return NGX_CONF_ERROR;
718 }
719
720 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
721
722 clcf->handler = ngx_http_memcached_handler;
723
724 if (clcf->name.len && clcf->name.data[clcf->name.len - 1] == '/') {
725 clcf->auto_redirect = 1;
726 }
727
728 mlcf->index = ngx_http_get_variable_index(cf, &ngx_http_memcached_key);
729
730 if (mlcf->index == NGX_ERROR) {
731 return NGX_CONF_ERROR;
732 }
733
734 return NGX_CONF_OK;
735 }
736