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nginx 0.7.8
[nginx-catap.git] / src / http / modules / ngx_http_proxy_module.c
blob880d998407da78e07d203089c17da569543e878b
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_event.h>
10 #include <ngx_http.h>
11
12
13 typedef struct ngx_http_proxy_redirect_s ngx_http_proxy_redirect_t;
14
15 typedef ngx_int_t (*ngx_http_proxy_redirect_pt)(ngx_http_request_t *r,
16 ngx_table_elt_t *h, size_t prefix, ngx_http_proxy_redirect_t *pr);
17
18 struct ngx_http_proxy_redirect_s {
19 ngx_http_proxy_redirect_pt handler;
20 ngx_str_t redirect;
21
22 union {
23 ngx_str_t text;
24
25 struct {
26 void *lengths;
27 void *values;
28 } vars;
29
30 void *regex;
31 } replacement;
32 };
33
34
35 typedef struct {
36 ngx_str_t host_header;
37 ngx_str_t port;
38 ngx_str_t uri;
39 } ngx_http_proxy_vars_t;
40
41
42 typedef struct {
43 ngx_http_upstream_conf_t upstream;
44
45 ngx_array_t *flushes;
46 ngx_array_t *body_set_len;
47 ngx_array_t *body_set;
48 ngx_array_t *headers_set_len;
49 ngx_array_t *headers_set;
50 ngx_hash_t headers_set_hash;
51
52 ngx_array_t *headers_source;
53 ngx_array_t *headers_names;
54
55 ngx_array_t *proxy_lengths;
56 ngx_array_t *proxy_values;
57
58 ngx_array_t *redirects;
59
60 ngx_str_t body_source;
61
62 ngx_str_t method;
63 ngx_str_t location;
64 ngx_str_t url;
65
66 ngx_http_proxy_vars_t vars;
67
68 ngx_flag_t redirect;
69
70 ngx_uint_t headers_hash_max_size;
71 ngx_uint_t headers_hash_bucket_size;
72 } ngx_http_proxy_loc_conf_t;
73
74
75 typedef struct {
76 ngx_uint_t status;
77 ngx_uint_t status_count;
78 u_char *status_start;
79 u_char *status_end;
80
81 ngx_http_proxy_vars_t vars;
82
83 size_t internal_body_length;
84 } ngx_http_proxy_ctx_t;
85
86
87 #define NGX_HTTP_PROXY_PARSE_NO_HEADER 20
88
89
90 static ngx_int_t ngx_http_proxy_eval(ngx_http_request_t *r,
91 ngx_http_proxy_ctx_t *ctx, ngx_http_proxy_loc_conf_t *plcf);
92 static ngx_int_t ngx_http_proxy_create_request(ngx_http_request_t *r);
93 static ngx_int_t ngx_http_proxy_reinit_request(ngx_http_request_t *r);
94 static ngx_int_t ngx_http_proxy_process_status_line(ngx_http_request_t *r);
95 static ngx_int_t ngx_http_proxy_parse_status_line(ngx_http_request_t *r,
96 ngx_http_proxy_ctx_t *ctx);
97 static ngx_int_t ngx_http_proxy_process_header(ngx_http_request_t *r);
98 static void ngx_http_proxy_abort_request(ngx_http_request_t *r);
99 static void ngx_http_proxy_finalize_request(ngx_http_request_t *r,
100 ngx_int_t rc);
101
102 static ngx_int_t ngx_http_proxy_host_variable(ngx_http_request_t *r,
103 ngx_http_variable_value_t *v, uintptr_t data);
104 static ngx_int_t ngx_http_proxy_port_variable(ngx_http_request_t *r,
105 ngx_http_variable_value_t *v, uintptr_t data);
106 static ngx_int_t
107 ngx_http_proxy_add_x_forwarded_for_variable(ngx_http_request_t *r,
108 ngx_http_variable_value_t *v, uintptr_t data);
109 static ngx_int_t
110 ngx_http_proxy_internal_body_length_variable(ngx_http_request_t *r,
111 ngx_http_variable_value_t *v, uintptr_t data);
112 static ngx_int_t ngx_http_proxy_rewrite_redirect(ngx_http_request_t *r,
113 ngx_table_elt_t *h, size_t prefix);
114
115 static ngx_int_t ngx_http_proxy_add_variables(ngx_conf_t *cf);
116 static void *ngx_http_proxy_create_loc_conf(ngx_conf_t *cf);
117 static char *ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf,
118 void *parent, void *child);
119
120 static char *ngx_http_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd,
121 void *conf);
122 static char *ngx_http_proxy_redirect(ngx_conf_t *cf, ngx_command_t *cmd,
123 void *conf);
124 static char *ngx_http_proxy_store(ngx_conf_t *cf, ngx_command_t *cmd,
125 void *conf);
126
127 static char *ngx_http_proxy_lowat_check(ngx_conf_t *cf, void *post, void *data);
128
129 static char *ngx_http_proxy_upstream_max_fails_unsupported(ngx_conf_t *cf,
130 ngx_command_t *cmd, void *conf);
131 static char *ngx_http_proxy_upstream_fail_timeout_unsupported(ngx_conf_t *cf,
132 ngx_command_t *cmd, void *conf);
133
134 #if (NGX_HTTP_SSL)
135 static ngx_int_t ngx_http_proxy_set_ssl(ngx_conf_t *cf,
136 ngx_http_proxy_loc_conf_t *plcf);
137 #endif
138 static ngx_int_t ngx_http_proxy_set_vars(ngx_pool_t *pool, ngx_url_t *u,
139 ngx_http_proxy_vars_t *v);
140
141
142 static ngx_conf_post_t ngx_http_proxy_lowat_post =
143 { ngx_http_proxy_lowat_check };
144
145
146 static ngx_conf_bitmask_t ngx_http_proxy_next_upstream_masks[] = {
147 { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR },
148 { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
149 { ngx_string("invalid_header"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
150 { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 },
151 { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
152 { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
153 { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
154 { ngx_null_string, 0 }
155 };
156
157
158 static ngx_command_t ngx_http_proxy_commands[] = {
159
160 { ngx_string("proxy_pass"),
161 NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_HTTP_LMT_CONF|NGX_CONF_TAKE1,
162 ngx_http_proxy_pass,
163 NGX_HTTP_LOC_CONF_OFFSET,
164 0,
165 NULL },
166
167 { ngx_string("proxy_redirect"),
168 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
169 ngx_http_proxy_redirect,
170 NGX_HTTP_LOC_CONF_OFFSET,
171 0,
172 NULL },
173
174 { ngx_string("proxy_store"),
175 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
176 ngx_http_proxy_store,
177 NGX_HTTP_LOC_CONF_OFFSET,
178 0,
179 NULL },
180
181 { ngx_string("proxy_store_access"),
182 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
183 ngx_conf_set_access_slot,
184 NGX_HTTP_LOC_CONF_OFFSET,
185 offsetof(ngx_http_proxy_loc_conf_t, upstream.store_access),
186 NULL },
187
188 { ngx_string("proxy_buffering"),
189 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
190 ngx_conf_set_flag_slot,
191 NGX_HTTP_LOC_CONF_OFFSET,
192 offsetof(ngx_http_proxy_loc_conf_t, upstream.buffering),
193 NULL },
194
195 { ngx_string("proxy_ignore_client_abort"),
196 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
197 ngx_conf_set_flag_slot,
198 NGX_HTTP_LOC_CONF_OFFSET,
199 offsetof(ngx_http_proxy_loc_conf_t, upstream.ignore_client_abort),
200 NULL },
201
202 { ngx_string("proxy_connect_timeout"),
203 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
204 ngx_conf_set_msec_slot,
205 NGX_HTTP_LOC_CONF_OFFSET,
206 offsetof(ngx_http_proxy_loc_conf_t, upstream.connect_timeout),
207 NULL },
208
209 { ngx_string("proxy_send_timeout"),
210 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
211 ngx_conf_set_msec_slot,
212 NGX_HTTP_LOC_CONF_OFFSET,
213 offsetof(ngx_http_proxy_loc_conf_t, upstream.send_timeout),
214 NULL },
215
216 { ngx_string("proxy_send_lowat"),
217 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
218 ngx_conf_set_size_slot,
219 NGX_HTTP_LOC_CONF_OFFSET,
220 offsetof(ngx_http_proxy_loc_conf_t, upstream.send_lowat),
221 &ngx_http_proxy_lowat_post },
222
223 { ngx_string("proxy_intercept_errors"),
224 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
225 ngx_conf_set_flag_slot,
226 NGX_HTTP_LOC_CONF_OFFSET,
227 offsetof(ngx_http_proxy_loc_conf_t, upstream.intercept_errors),
228 NULL },
229
230 { ngx_string("proxy_set_header"),
231 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
232 ngx_conf_set_keyval_slot,
233 NGX_HTTP_LOC_CONF_OFFSET,
234 offsetof(ngx_http_proxy_loc_conf_t, headers_source),
235 NULL },
236
237 { ngx_string("proxy_headers_hash_max_size"),
238 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
239 ngx_conf_set_num_slot,
240 NGX_HTTP_LOC_CONF_OFFSET,
241 offsetof(ngx_http_proxy_loc_conf_t, headers_hash_max_size),
242 NULL },
243
244 { ngx_string("proxy_headers_hash_bucket_size"),
245 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
246 ngx_conf_set_num_slot,
247 NGX_HTTP_LOC_CONF_OFFSET,
248 offsetof(ngx_http_proxy_loc_conf_t, headers_hash_bucket_size),
249 NULL },
250
251 { ngx_string("proxy_set_body"),
252 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
253 ngx_conf_set_str_slot,
254 NGX_HTTP_LOC_CONF_OFFSET,
255 offsetof(ngx_http_proxy_loc_conf_t, body_source),
256 NULL },
257
258 { ngx_string("proxy_method"),
259 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
260 ngx_conf_set_str_slot,
261 NGX_HTTP_LOC_CONF_OFFSET,
262 offsetof(ngx_http_proxy_loc_conf_t, method),
263 NULL },
264
265 { ngx_string("proxy_pass_request_headers"),
266 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
267 ngx_conf_set_flag_slot,
268 NGX_HTTP_LOC_CONF_OFFSET,
269 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_request_headers),
270 NULL },
271
272 { ngx_string("proxy_pass_request_body"),
273 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
274 ngx_conf_set_flag_slot,
275 NGX_HTTP_LOC_CONF_OFFSET,
276 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_request_body),
277 NULL },
278
279 { ngx_string("proxy_buffer_size"),
280 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
281 ngx_conf_set_size_slot,
282 NGX_HTTP_LOC_CONF_OFFSET,
283 offsetof(ngx_http_proxy_loc_conf_t, upstream.buffer_size),
284 NULL },
285
286 { ngx_string("proxy_read_timeout"),
287 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
288 ngx_conf_set_msec_slot,
289 NGX_HTTP_LOC_CONF_OFFSET,
290 offsetof(ngx_http_proxy_loc_conf_t, upstream.read_timeout),
291 NULL },
292
293 { ngx_string("proxy_buffers"),
294 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
295 ngx_conf_set_bufs_slot,
296 NGX_HTTP_LOC_CONF_OFFSET,
297 offsetof(ngx_http_proxy_loc_conf_t, upstream.bufs),
298 NULL },
299
300 { ngx_string("proxy_busy_buffers_size"),
301 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
302 ngx_conf_set_size_slot,
303 NGX_HTTP_LOC_CONF_OFFSET,
304 offsetof(ngx_http_proxy_loc_conf_t, upstream.busy_buffers_size_conf),
305 NULL },
306
307 { ngx_string("proxy_temp_path"),
308 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
309 ngx_conf_set_path_slot,
310 NGX_HTTP_LOC_CONF_OFFSET,
311 offsetof(ngx_http_proxy_loc_conf_t, upstream.temp_path),
312 (void *) ngx_garbage_collector_temp_handler },
313
314 { ngx_string("proxy_max_temp_file_size"),
315 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
316 ngx_conf_set_size_slot,
317 NGX_HTTP_LOC_CONF_OFFSET,
318 offsetof(ngx_http_proxy_loc_conf_t, upstream.max_temp_file_size_conf),
319 NULL },
320
321 { ngx_string("proxy_temp_file_write_size"),
322 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
323 ngx_conf_set_size_slot,
324 NGX_HTTP_LOC_CONF_OFFSET,
325 offsetof(ngx_http_proxy_loc_conf_t, upstream.temp_file_write_size_conf),
326 NULL },
327
328 { ngx_string("proxy_next_upstream"),
329 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
330 ngx_conf_set_bitmask_slot,
331 NGX_HTTP_LOC_CONF_OFFSET,
332 offsetof(ngx_http_proxy_loc_conf_t, upstream.next_upstream),
333 &ngx_http_proxy_next_upstream_masks },
334
335 { ngx_string("proxy_upstream_max_fails"),
336 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
337 ngx_http_proxy_upstream_max_fails_unsupported,
338 0,
339 0,
340 NULL },
341
342 { ngx_string("proxy_upstream_fail_timeout"),
343 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
344 ngx_http_proxy_upstream_fail_timeout_unsupported,
345 0,
346 0,
347 NULL },
348
349 { ngx_string("proxy_pass_header"),
350 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
351 ngx_conf_set_str_array_slot,
352 NGX_HTTP_LOC_CONF_OFFSET,
353 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_headers),
354 NULL },
355
356 { ngx_string("proxy_hide_header"),
357 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
358 ngx_conf_set_str_array_slot,
359 NGX_HTTP_LOC_CONF_OFFSET,
360 offsetof(ngx_http_proxy_loc_conf_t, upstream.hide_headers),
361 NULL },
362
363 ngx_null_command
364 };
365
366
367 static ngx_http_module_t ngx_http_proxy_module_ctx = {
368 ngx_http_proxy_add_variables, /* preconfiguration */
369 NULL, /* postconfiguration */
370
371 NULL, /* create main configuration */
372 NULL, /* init main configuration */
373
374 NULL, /* create server configuration */
375 NULL, /* merge server configuration */
376
377 ngx_http_proxy_create_loc_conf, /* create location configration */
378 ngx_http_proxy_merge_loc_conf /* merge location configration */
379 };
380
381
382 ngx_module_t ngx_http_proxy_module = {
383 NGX_MODULE_V1,
384 &ngx_http_proxy_module_ctx, /* module context */
385 ngx_http_proxy_commands, /* module directives */
386 NGX_HTTP_MODULE, /* module type */
387 NULL, /* init master */
388 NULL, /* init module */
389 NULL, /* init process */
390 NULL, /* init thread */
391 NULL, /* exit thread */
392 NULL, /* exit process */
393 NULL, /* exit master */
394 NGX_MODULE_V1_PADDING
395 };
396
397
398 static char ngx_http_proxy_version[] = " HTTP/1.0" CRLF;
399
400
401 static ngx_keyval_t ngx_http_proxy_headers[] = {
402 { ngx_string("Host"), ngx_string("$proxy_host") },
403 { ngx_string("Connection"), ngx_string("close") },
404 { ngx_string("Keep-Alive"), ngx_string("") },
405 { ngx_string("Expect"), ngx_string("") },
406 { ngx_null_string, ngx_null_string }
407 };
408
409
410 static ngx_str_t ngx_http_proxy_hide_headers[] = {
411 ngx_string("Date"),
412 ngx_string("Server"),
413 ngx_string("X-Pad"),
414 ngx_string("X-Accel-Expires"),
415 ngx_string("X-Accel-Redirect"),
416 ngx_string("X-Accel-Limit-Rate"),
417 ngx_string("X-Accel-Buffering"),
418 ngx_string("X-Accel-Charset"),
419 ngx_null_string
420 };
421
422
423 static ngx_http_variable_t ngx_http_proxy_vars[] = {
424
425 { ngx_string("proxy_host"), NULL, ngx_http_proxy_host_variable, 0,
426 NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
427
428 { ngx_string("proxy_port"), NULL, ngx_http_proxy_port_variable, 0,
429 NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
430
431 { ngx_string("proxy_add_x_forwarded_for"), NULL,
432 ngx_http_proxy_add_x_forwarded_for_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
433
434 #if 0
435 { ngx_string("proxy_add_via"), NULL, NULL, 0, NGX_HTTP_VAR_NOHASH, 0 },
436 #endif
437
438 { ngx_string("proxy_internal_body_length"), NULL,
439 ngx_http_proxy_internal_body_length_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
440
441 { ngx_null_string, NULL, NULL, 0, 0, 0 }
442 };
443
444
445 static ngx_int_t
446 ngx_http_proxy_handler(ngx_http_request_t *r)
447 {
448 ngx_int_t rc;
449 ngx_http_upstream_t *u;
450 ngx_http_proxy_ctx_t *ctx;
451 ngx_http_proxy_loc_conf_t *plcf;
452
453 u = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_t));
454 if (u == NULL) {
455 return NGX_HTTP_INTERNAL_SERVER_ERROR;
456 }
457
458 r->upstream = u;
459
460 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_proxy_ctx_t));
461 if (ctx == NULL) {
462 return NGX_ERROR;
463 }
464
465 ngx_http_set_ctx(r, ctx, ngx_http_proxy_module);
466
467 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
468
469 if (plcf->proxy_lengths == 0) {
470 ctx->vars = plcf->vars;
471 u->schema = plcf->upstream.schema;
472 #if (NGX_HTTP_SSL)
473 u->ssl = (plcf->upstream.ssl != NULL);
474 #endif
475
476 } else {
477 if (ngx_http_proxy_eval(r, ctx, plcf) != NGX_OK) {
478 return NGX_HTTP_INTERNAL_SERVER_ERROR;
479 }
480 }
481
482 u->peer.log = r->connection->log;
483 u->peer.log_error = NGX_ERROR_ERR;
484 #if (NGX_THREADS)
485 u->peer.lock = &r->connection->lock;
486 #endif
487
488 u->output.tag = (ngx_buf_tag_t) &ngx_http_proxy_module;
489
490 u->conf = &plcf->upstream;
491
492 u->create_request = ngx_http_proxy_create_request;
493 u->reinit_request = ngx_http_proxy_reinit_request;
494 u->process_header = ngx_http_proxy_process_status_line;
495 u->abort_request = ngx_http_proxy_abort_request;
496 u->finalize_request = ngx_http_proxy_finalize_request;
497
498 if (plcf->redirects) {
499 u->rewrite_redirect = ngx_http_proxy_rewrite_redirect;
500 }
501
502 u->buffering = plcf->upstream.buffering;
503
504 u->pipe = ngx_pcalloc(r->pool, sizeof(ngx_event_pipe_t));
505 if (u->pipe == NULL) {
506 return NGX_HTTP_INTERNAL_SERVER_ERROR;
507 }
508
509 u->pipe->input_filter = ngx_event_pipe_copy_input_filter;
510
511 u->accel = 1;
512
513 rc = ngx_http_read_client_request_body(r, ngx_http_upstream_init);
514
515 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
516 return rc;
517 }
518
519 return NGX_DONE;
520 }
521
522
523 static ngx_int_t
524 ngx_http_proxy_eval(ngx_http_request_t *r, ngx_http_proxy_ctx_t *ctx,
525 ngx_http_proxy_loc_conf_t *plcf)
526 {
527 size_t add;
528 u_short port;
529 ngx_str_t proxy;
530 ngx_url_t u;
531
532 if (ngx_http_script_run(r, &proxy, plcf->proxy_lengths->elts, 0,
533 plcf->proxy_values->elts)
534 == NULL)
535 {
536 return NGX_ERROR;
537 }
538
539 if (ngx_strncasecmp(proxy.data, (u_char *) "http://", 7) == 0) {
540
541 add = 7;
542 port = 80;
543
544 #if (NGX_HTTP_SSL)
545
546 } else if (ngx_strncasecmp(proxy.data, (u_char *) "https://", 8) == 0) {
547
548 add = 8;
549 port = 443;
550 r->upstream->ssl = 1;
551
552 #endif
553
554 } else {
555 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
556 "invalid URL prefix in \"%V\"", &proxy);
557 return NGX_ERROR;
558 }
559
560 r->upstream->schema.len = add;
561 r->upstream->schema.data = proxy.data;
562
563 ngx_memzero(&u, sizeof(ngx_url_t));
564
565 u.url.len = proxy.len - add;
566 u.url.data = proxy.data + add;
567 u.default_port = port;
568 u.uri_part = 1;
569 u.no_resolve = 1;
570
571 if (ngx_parse_url(r->pool, &u) != NGX_OK) {
572 if (u.err) {
573 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
574 "%s in upstream \"%V\"", u.err, &u.url);
575 }
576
577 return NGX_ERROR;
578 }
579
580 if (ngx_http_proxy_set_vars(r->pool, &u, &ctx->vars) != NGX_OK) {
581 return NGX_ERROR;
582 }
583
584 r->upstream->resolved = ngx_pcalloc(r->pool,
585 sizeof(ngx_http_upstream_resolved_t));
586 if (r->upstream->resolved == NULL) {
587 return NGX_ERROR;
588 }
589
590 r->upstream->resolved->host = u.host;
591 r->upstream->resolved->port = (in_port_t) (u.no_port ? u.default_port:
592 u.port);
593 r->upstream->resolved->default_port = u.default_port;
594
595 return NGX_OK;
596 }
597
598
599 static ngx_int_t
600 ngx_http_proxy_create_request(ngx_http_request_t *r)
601 {
602 size_t len, loc_len, body_len;
603 uintptr_t escape;
604 ngx_buf_t *b;
605 ngx_str_t method;
606 ngx_uint_t i, unparsed_uri;
607 ngx_chain_t *cl, *body;
608 ngx_list_part_t *part;
609 ngx_table_elt_t *header;
610 ngx_http_upstream_t *u;
611 ngx_http_proxy_ctx_t *ctx;
612 ngx_http_script_code_pt code;
613 ngx_http_script_engine_t e, le;
614 ngx_http_proxy_loc_conf_t *plcf;
615 ngx_http_script_len_code_pt lcode;
616
617 u = r->upstream;
618
619 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
620
621 if (u->method.len) {
622 /* HEAD was changed to GET to cache response */
623 method = u->method;
624 method.len++;
625
626 } else if (plcf->method.len) {
627 method = plcf->method;
628
629 } else {
630 method = r->method_name;
631 method.len++;
632 }
633
634 len = method.len + sizeof(ngx_http_proxy_version) - 1 + sizeof(CRLF) - 1;
635
636 escape = 0;
637 loc_len = 0;
638 unparsed_uri = 0;
639
640 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
641
642 if (plcf->proxy_lengths) {
643 len += ctx->vars.uri.len;
644
645 } else if (ctx->vars.uri.len == 0 && r->valid_unparsed_uri && r == r->main)
646 {
647 unparsed_uri = 1;
648 len += r->unparsed_uri.len;
649
650 } else {
651 loc_len = (r->valid_location && ctx->vars.uri.len) ?
652 plcf->location.len : 0;
653
654 if (r->quoted_uri || r->internal) {
655 escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len,
656 r->uri.len - loc_len, NGX_ESCAPE_URI);
657 }
658
659 len += ctx->vars.uri.len + r->uri.len - loc_len + escape
660 + sizeof("?") - 1 + r->args.len;
661 }
662
663 ngx_http_script_flush_no_cacheable_variables(r, plcf->flushes);
664
665 if (plcf->body_set_len) {
666 le.ip = plcf->body_set_len->elts;
667 le.request = r;
668 le.flushed = 1;
669 body_len = 0;
670
671 while (*(uintptr_t *) le.ip) {
672 lcode = *(ngx_http_script_len_code_pt *) le.ip;
673 body_len += lcode(&le);
674 }
675
676 ctx->internal_body_length = body_len;
677 len += body_len;
678 }
679
680 le.ip = plcf->headers_set_len->elts;
681 le.request = r;
682 le.flushed = 1;
683
684 while (*(uintptr_t *) le.ip) {
685 while (*(uintptr_t *) le.ip) {
686 lcode = *(ngx_http_script_len_code_pt *) le.ip;
687 len += lcode(&le);
688 }
689 le.ip += sizeof(uintptr_t);
690 }
691
692
693 if (plcf->upstream.pass_request_headers) {
694 part = &r->headers_in.headers.part;
695 header = part->elts;
696
697 for (i = 0; /* void */; i++) {
698
699 if (i >= part->nelts) {
700 if (part->next == NULL) {
701 break;
702 }
703
704 part = part->next;
705 header = part->elts;
706 i = 0;
707 }
708
709 if (ngx_hash_find(&plcf->headers_set_hash, header[i].hash,
710 header[i].lowcase_key, header[i].key.len))
711 {
712 continue;
713 }
714
715 len += header[i].key.len + sizeof(": ") - 1
716 + header[i].value.len + sizeof(CRLF) - 1;
717 }
718 }
719
720
721 b = ngx_create_temp_buf(r->pool, len);
722 if (b == NULL) {
723 return NGX_ERROR;
724 }
725
726 cl = ngx_alloc_chain_link(r->pool);
727 if (cl == NULL) {
728 return NGX_ERROR;
729 }
730
731 cl->buf = b;
732
733
734 /* the request line */
735
736 b->last = ngx_copy(b->last, method.data, method.len);
737
738 u->uri.data = b->last;
739
740 if (plcf->proxy_lengths) {
741 b->last = ngx_copy(b->last, ctx->vars.uri.data, ctx->vars.uri.len);
742
743 } else if (unparsed_uri) {
744 b->last = ngx_copy(b->last, r->unparsed_uri.data, r->unparsed_uri.len);
745
746 } else {
747 if (r->valid_location) {
748 b->last = ngx_copy(b->last, ctx->vars.uri.data, ctx->vars.uri.len);
749 }
750
751 if (escape) {
752 ngx_escape_uri(b->last, r->uri.data + loc_len,
753 r->uri.len - loc_len, NGX_ESCAPE_URI);
754 b->last += r->uri.len - loc_len + escape;
755
756 } else {
757 b->last = ngx_copy(b->last, r->uri.data + loc_len,
758 r->uri.len - loc_len);
759 }
760
761 if (r->args.len > 0) {
762 *b->last++ = '?';
763 b->last = ngx_copy(b->last, r->args.data, r->args.len);
764 }
765 }
766
767 u->uri.len = b->last - u->uri.data;
768
769 b->last = ngx_cpymem(b->last, ngx_http_proxy_version,
770 sizeof(ngx_http_proxy_version) - 1);
771
772 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
773
774 e.ip = plcf->headers_set->elts;
775 e.pos = b->last;
776 e.request = r;
777 e.flushed = 1;
778
779 le.ip = plcf->headers_set_len->elts;
780
781 while (*(uintptr_t *) le.ip) {
782 lcode = *(ngx_http_script_len_code_pt *) le.ip;
783
784 /* skip the header line name length */
785 (void) lcode(&le);
786
787 if (*(ngx_http_script_len_code_pt *) le.ip) {
788
789 for (len = 0; *(uintptr_t *) le.ip; len += lcode(&le)) {
790 lcode = *(ngx_http_script_len_code_pt *) le.ip;
791 }
792
793 e.skip = (len == sizeof(CRLF) - 1) ? 1 : 0;
794
795 } else {
796 e.skip = 0;
797 }
798
799 le.ip += sizeof(uintptr_t);
800
801 while (*(uintptr_t *) e.ip) {
802 code = *(ngx_http_script_code_pt *) e.ip;
803 code((ngx_http_script_engine_t *) &e);
804 }
805 e.ip += sizeof(uintptr_t);
806 }
807
808 b->last = e.pos;
809
810
811 if (plcf->upstream.pass_request_headers) {
812 part = &r->headers_in.headers.part;
813 header = part->elts;
814
815 for (i = 0; /* void */; i++) {
816
817 if (i >= part->nelts) {
818 if (part->next == NULL) {
819 break;
820 }
821
822 part = part->next;
823 header = part->elts;
824 i = 0;
825 }
826
827 if (ngx_hash_find(&plcf->headers_set_hash, header[i].hash,
828 header[i].lowcase_key, header[i].key.len))
829 {
830 continue;
831 }
832
833 b->last = ngx_copy(b->last, header[i].key.data, header[i].key.len);
834
835 *b->last++ = ':'; *b->last++ = ' ';
836
837 b->last = ngx_copy(b->last, header[i].value.data,
838 header[i].value.len);
839
840 *b->last++ = CR; *b->last++ = LF;
841
842 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
843 "http proxy header: \"%V: %V\"",
844 &header[i].key, &header[i].value);
845 }
846 }
847
848
849 /* add "\r\n" at the header end */
850 *b->last++ = CR; *b->last++ = LF;
851
852 if (plcf->body_set) {
853 e.ip = plcf->body_set->elts;
854 e.pos = b->last;
855
856 while (*(uintptr_t *) e.ip) {
857 code = *(ngx_http_script_code_pt *) e.ip;
858 code((ngx_http_script_engine_t *) &e);
859 }
860
861 b->last = e.pos;
862 }
863
864 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
865 "http proxy header:\n\"%*s\"",
866 (size_t) (b->last - b->pos), b->pos);
867
868 if (plcf->body_set == NULL && plcf->upstream.pass_request_body) {
869
870 body = u->request_bufs;
871 u->request_bufs = cl;
872
873 while (body) {
874 b = ngx_alloc_buf(r->pool);
875 if (b == NULL) {
876 return NGX_ERROR;
877 }
878
879 ngx_memcpy(b, body->buf, sizeof(ngx_buf_t));
880
881 cl->next = ngx_alloc_chain_link(r->pool);
882 if (cl->next == NULL) {
883 return NGX_ERROR;
884 }
885
886 cl = cl->next;
887 cl->buf = b;
888
889 body = body->next;
890 }
891
892 b->flush = 1;
893
894 } else {
895 u->request_bufs = cl;
896 }
897
898 cl->next = NULL;
899
900 return NGX_OK;
901 }
902
903
904 static ngx_int_t
905 ngx_http_proxy_reinit_request(ngx_http_request_t *r)
906 {
907 ngx_http_proxy_ctx_t *ctx;
908
909 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
910
911 if (ctx == NULL) {
912 return NGX_OK;
913 }
914
915 ctx->status = 0;
916 ctx->status_count = 0;
917 ctx->status_start = NULL;
918 ctx->status_end = NULL;
919
920 r->upstream->process_header = ngx_http_proxy_process_status_line;
921
922 return NGX_OK;
923 }
924
925
926 static ngx_int_t
927 ngx_http_proxy_process_status_line(ngx_http_request_t *r)
928 {
929 ngx_int_t rc;
930 ngx_http_upstream_t *u;
931 ngx_http_proxy_ctx_t *ctx;
932
933 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
934
935 if (ctx == NULL) {
936 return NGX_ERROR;
937 }
938
939 rc = ngx_http_proxy_parse_status_line(r, ctx);
940
941 if (rc == NGX_AGAIN) {
942 return rc;
943 }
944
945 u = r->upstream;
946
947 if (rc == NGX_HTTP_PROXY_PARSE_NO_HEADER) {
948 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
949 "upstream sent no valid HTTP/1.0 header");
950
951 #if 0
952 if (u->accel) {
953 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
954 }
955 #endif
956
957 r->http_version = NGX_HTTP_VERSION_9;
958 u->headers_in.status_n = NGX_HTTP_OK;
959 u->state->status = NGX_HTTP_OK;
960
961 return NGX_OK;
962 }
963
964 u->headers_in.status_n = ctx->status;
965 u->state->status = ctx->status;
966
967 u->headers_in.status_line.len = ctx->status_end - ctx->status_start;
968 u->headers_in.status_line.data = ngx_pnalloc(r->pool,
969 u->headers_in.status_line.len);
970 if (u->headers_in.status_line.data == NULL) {
971 return NGX_ERROR;
972 }
973
974 ngx_memcpy(u->headers_in.status_line.data, ctx->status_start,
975 u->headers_in.status_line.len);
976
977 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
978 "http proxy status %ui \"%V\"",
979 u->headers_in.status_n, &u->headers_in.status_line);
980
981 u->process_header = ngx_http_proxy_process_header;
982
983 return ngx_http_proxy_process_header(r);
984 }
985
986
987 static ngx_int_t
988 ngx_http_proxy_parse_status_line(ngx_http_request_t *r,
989 ngx_http_proxy_ctx_t *ctx)
990 {
991 u_char ch;
992 u_char *p;
993 ngx_http_upstream_t *u;
994 enum {
995 sw_start = 0,
996 sw_H,
997 sw_HT,
998 sw_HTT,
999 sw_HTTP,
1000 sw_first_major_digit,
1001 sw_major_digit,
1002 sw_first_minor_digit,
1003 sw_minor_digit,
1004 sw_status,
1005 sw_space_after_status,
1006 sw_status_text,
1007 sw_almost_done
1008 } state;
1009
1010 u = r->upstream;
1011
1012 state = r->state;
1013
1014 for (p = u->buffer.pos; p < u->buffer.last; p++) {
1015 ch = *p;
1016
1017 switch (state) {
1018
1019 /* "HTTP/" */
1020 case sw_start:
1021 switch (ch) {
1022 case 'H':
1023 state = sw_H;
1024 break;
1025 default:
1026 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1027 }
1028 break;
1029
1030 case sw_H:
1031 switch (ch) {
1032 case 'T':
1033 state = sw_HT;
1034 break;
1035 default:
1036 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1037 }
1038 break;
1039
1040 case sw_HT:
1041 switch (ch) {
1042 case 'T':
1043 state = sw_HTT;
1044 break;
1045 default:
1046 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1047 }
1048 break;
1049
1050 case sw_HTT:
1051 switch (ch) {
1052 case 'P':
1053 state = sw_HTTP;
1054 break;
1055 default:
1056 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1057 }
1058 break;
1059
1060 case sw_HTTP:
1061 switch (ch) {
1062 case '/':
1063 state = sw_first_major_digit;
1064 break;
1065 default:
1066 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1067 }
1068 break;
1069
1070 /* the first digit of major HTTP version */
1071 case sw_first_major_digit:
1072 if (ch < '1' || ch > '9') {
1073 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1074 }
1075
1076 state = sw_major_digit;
1077 break;
1078
1079 /* the major HTTP version or dot */
1080 case sw_major_digit:
1081 if (ch == '.') {
1082 state = sw_first_minor_digit;
1083 break;
1084 }
1085
1086 if (ch < '0' || ch > '9') {
1087 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1088 }
1089
1090 break;
1091
1092 /* the first digit of minor HTTP version */
1093 case sw_first_minor_digit:
1094 if (ch < '0' || ch > '9') {
1095 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1096 }
1097
1098 state = sw_minor_digit;
1099 break;
1100
1101 /* the minor HTTP version or the end of the request line */
1102 case sw_minor_digit:
1103 if (ch == ' ') {
1104 state = sw_status;
1105 break;
1106 }
1107
1108 if (ch < '0' || ch > '9') {
1109 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1110 }
1111
1112 break;
1113
1114 /* HTTP status code */
1115 case sw_status:
1116 if (ch == ' ') {
1117 break;
1118 }
1119
1120 if (ch < '0' || ch > '9') {
1121 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1122 }
1123
1124 ctx->status = ctx->status * 10 + ch - '0';
1125
1126 if (++ctx->status_count == 3) {
1127 state = sw_space_after_status;
1128 ctx->status_start = p - 2;
1129 }
1130
1131 break;
1132
1133 /* space or end of line */
1134 case sw_space_after_status:
1135 switch (ch) {
1136 case ' ':
1137 state = sw_status_text;
1138 break;
1139 case '.': /* IIS may send 403.1, 403.2, etc */
1140 state = sw_status_text;
1141 break;
1142 case CR:
1143 state = sw_almost_done;
1144 break;
1145 case LF:
1146 goto done;
1147 default:
1148 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1149 }
1150 break;
1151
1152 /* any text until end of line */
1153 case sw_status_text:
1154 switch (ch) {
1155 case CR:
1156 state = sw_almost_done;
1157
1158 break;
1159 case LF:
1160 goto done;
1161 }
1162 break;
1163
1164 /* end of status line */
1165 case sw_almost_done:
1166 ctx->status_end = p - 1;
1167 switch (ch) {
1168 case LF:
1169 goto done;
1170 default:
1171 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1172 }
1173 }
1174 }
1175
1176 u->buffer.pos = p;
1177 r->state = state;
1178
1179 return NGX_AGAIN;
1180
1181 done:
1182
1183 u->buffer.pos = p + 1;
1184
1185 if (ctx->status_end == NULL) {
1186 ctx->status_end = p;
1187 }
1188
1189 r->state = sw_start;
1190
1191 return NGX_OK;
1192 }
1193
1194
1195 static ngx_int_t
1196 ngx_http_proxy_process_header(ngx_http_request_t *r)
1197 {
1198 ngx_int_t rc;
1199 ngx_table_elt_t *h;
1200 ngx_http_upstream_header_t *hh;
1201 ngx_http_upstream_main_conf_t *umcf;
1202
1203 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
1204
1205 for ( ;; ) {
1206
1207 rc = ngx_http_parse_header_line(r, &r->upstream->buffer);
1208
1209 if (rc == NGX_OK) {
1210
1211 /* a header line has been parsed successfully */
1212
1213 h = ngx_list_push(&r->upstream->headers_in.headers);
1214 if (h == NULL) {
1215 return NGX_ERROR;
1216 }
1217
1218 h->hash = r->header_hash;
1219
1220 h->key.len = r->header_name_end - r->header_name_start;
1221 h->value.len = r->header_end - r->header_start;
1222
1223 h->key.data = ngx_pnalloc(r->pool,
1224 h->key.len + 1 + h->value.len + 1 + h->key.len);
1225 if (h->key.data == NULL) {
1226 return NGX_ERROR;
1227 }
1228
1229 h->value.data = h->key.data + h->key.len + 1;
1230 h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1;
1231
1232 ngx_cpystrn(h->key.data, r->header_name_start, h->key.len + 1);
1233 ngx_cpystrn(h->value.data, r->header_start, h->value.len + 1);
1234
1235 if (h->key.len == r->lowcase_index) {
1236 ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);
1237
1238 } else {
1239 ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
1240 }
1241
1242 hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
1243 h->lowcase_key, h->key.len);
1244
1245 if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
1246 return NGX_ERROR;
1247 }
1248
1249 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1250 "http proxy header: \"%V: %V\"",
1251 &h->key, &h->value);
1252
1253 continue;
1254 }
1255
1256 if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
1257
1258 /* a whole header has been parsed successfully */
1259
1260 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1261 "http proxy header done");
1262
1263 /*
1264 * if no "Server" and "Date" in header line,
1265 * then add the special empty headers
1266 */
1267
1268 if (r->upstream->headers_in.server == NULL) {
1269 h = ngx_list_push(&r->upstream->headers_in.headers);
1270 if (h == NULL) {
1271 return NGX_ERROR;
1272 }
1273
1274 h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash(
1275 ngx_hash('s', 'e'), 'r'), 'v'), 'e'), 'r');
1276
1277 h->key.len = sizeof("Server") - 1;
1278 h->key.data = (u_char *) "Server";
1279 h->value.len = 0;
1280 h->value.data = NULL;
1281 h->lowcase_key = (u_char *) "server";
1282 }
1283
1284 if (r->upstream->headers_in.date == NULL) {
1285 h = ngx_list_push(&r->upstream->headers_in.headers);
1286 if (h == NULL) {
1287 return NGX_ERROR;
1288 }
1289
1290 h->hash = ngx_hash(ngx_hash(ngx_hash('d', 'a'), 't'), 'e');
1291
1292 h->key.len = sizeof("Date") - 1;
1293 h->key.data = (u_char *) "Date";
1294 h->value.len = 0;
1295 h->value.data = NULL;
1296 h->lowcase_key = (u_char *) "date";
1297 }
1298
1299 return NGX_OK;
1300 }
1301
1302 if (rc == NGX_AGAIN) {
1303 return NGX_AGAIN;
1304 }
1305
1306 /* there was error while a header line parsing */
1307
1308 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1309 "upstream sent invalid header");
1310
1311 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
1312 }
1313 }
1314
1315
1316 static void
1317 ngx_http_proxy_abort_request(ngx_http_request_t *r)
1318 {
1319 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1320 "abort http proxy request");
1321
1322 return;
1323 }
1324
1325
1326 static void
1327 ngx_http_proxy_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
1328 {
1329 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1330 "finalize http proxy request");
1331
1332 return;
1333 }
1334
1335
1336 static ngx_int_t
1337 ngx_http_proxy_host_variable(ngx_http_request_t *r,
1338 ngx_http_variable_value_t *v, uintptr_t data)
1339 {
1340 ngx_http_proxy_ctx_t *ctx;
1341
1342 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
1343
1344 if (ctx == NULL) {
1345 v->not_found = 1;
1346 return NGX_OK;
1347 }
1348
1349 v->len = ctx->vars.host_header.len;
1350 v->valid = 1;
1351 v->no_cacheable = 0;
1352 v->not_found = 0;
1353 v->data = ctx->vars.host_header.data;
1354
1355 return NGX_OK;
1356 }
1357
1358
1359 static ngx_int_t
1360 ngx_http_proxy_port_variable(ngx_http_request_t *r,
1361 ngx_http_variable_value_t *v, uintptr_t data)
1362 {
1363 ngx_http_proxy_ctx_t *ctx;
1364
1365 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
1366
1367 if (ctx == NULL) {
1368 v->not_found = 1;
1369 return NGX_OK;
1370 }
1371
1372 v->len = ctx->vars.port.len;
1373 v->valid = 1;
1374 v->no_cacheable = 0;
1375 v->not_found = 0;
1376 v->data = ctx->vars.port.data;
1377
1378 return NGX_OK;
1379 }
1380
1381
1382 static ngx_int_t
1383 ngx_http_proxy_add_x_forwarded_for_variable(ngx_http_request_t *r,
1384 ngx_http_variable_value_t *v, uintptr_t data)
1385 {
1386 u_char *p;
1387
1388 v->valid = 1;
1389 v->no_cacheable = 0;
1390 v->not_found = 0;
1391
1392 if (r->headers_in.x_forwarded_for == NULL) {
1393 v->len = r->connection->addr_text.len;
1394 v->data = r->connection->addr_text.data;
1395 return NGX_OK;
1396 }
1397
1398 v->len = r->headers_in.x_forwarded_for->value.len
1399 + sizeof(", ") - 1 + r->connection->addr_text.len;
1400
1401 p = ngx_pnalloc(r->pool, v->len);
1402 if (p == NULL) {
1403 return NGX_ERROR;
1404 }
1405
1406 v->data = p;
1407
1408 p = ngx_copy(p, r->headers_in.x_forwarded_for->value.data,
1409 r->headers_in.x_forwarded_for->value.len);
1410
1411 *p++ = ','; *p++ = ' ';
1412
1413 ngx_memcpy(p, r->connection->addr_text.data, r->connection->addr_text.len);
1414
1415 return NGX_OK;
1416 }
1417
1418
1419 static ngx_int_t
1420 ngx_http_proxy_internal_body_length_variable(ngx_http_request_t *r,
1421 ngx_http_variable_value_t *v, uintptr_t data)
1422 {
1423 ngx_http_proxy_ctx_t *ctx;
1424
1425 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
1426
1427 if (ctx == NULL) {
1428 v->not_found = 1;
1429 return NGX_OK;
1430 }
1431
1432 v->valid = 1;
1433 v->no_cacheable = 0;
1434 v->not_found = 0;
1435
1436 v->data = ngx_pnalloc(r->connection->pool, NGX_SIZE_T_LEN);
1437
1438 if (v->data == NULL) {
1439 return NGX_ERROR;
1440 }
1441
1442 v->len = ngx_sprintf(v->data, "%uz", ctx->internal_body_length) - v->data;
1443
1444 return NGX_OK;
1445 }
1446
1447
1448 static ngx_int_t
1449 ngx_http_proxy_rewrite_redirect(ngx_http_request_t *r, ngx_table_elt_t *h,
1450 size_t prefix)
1451 {
1452 ngx_int_t rc;
1453 ngx_uint_t i;
1454 ngx_http_proxy_loc_conf_t *plcf;
1455 ngx_http_proxy_redirect_t *pr;
1456
1457 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
1458
1459 pr = plcf->redirects->elts;
1460
1461 if (pr == NULL) {
1462 return NGX_DECLINED;
1463 }
1464
1465 for (i = 0; i < plcf->redirects->nelts; i++) {
1466 rc = pr[i].handler(r, h, prefix, &pr[i]);
1467
1468 if (rc != NGX_DECLINED) {
1469 return rc;
1470 }
1471 }
1472
1473 return NGX_DECLINED;
1474 }
1475
1476
1477 static ngx_int_t
1478 ngx_http_proxy_rewrite_redirect_text(ngx_http_request_t *r, ngx_table_elt_t *h,
1479 size_t prefix, ngx_http_proxy_redirect_t *pr)
1480 {
1481 size_t len;
1482 u_char *data, *p;
1483
1484 if (pr->redirect.len > h->value.len - prefix
1485 || ngx_rstrncmp(h->value.data + prefix, pr->redirect.data,
1486 pr->redirect.len) != 0)
1487 {
1488 return NGX_DECLINED;
1489 }
1490
1491 len = prefix + pr->replacement.text.len + h->value.len - pr->redirect.len;
1492
1493 data = ngx_pnalloc(r->pool, len);
1494 if (data == NULL) {
1495 return NGX_ERROR;
1496 }
1497
1498 p = data;
1499
1500 p = ngx_copy(p, h->value.data, prefix);
1501
1502 if (pr->replacement.text.len) {
1503 p = ngx_copy(p, pr->replacement.text.data, pr->replacement.text.len);
1504 }
1505
1506 ngx_memcpy(p, h->value.data + prefix + pr->redirect.len,
1507 h->value.len - pr->redirect.len - prefix);
1508
1509 h->value.len = len;
1510 h->value.data = data;
1511
1512 return NGX_OK;
1513 }
1514
1515
1516 static ngx_int_t
1517 ngx_http_proxy_rewrite_redirect_vars(ngx_http_request_t *r, ngx_table_elt_t *h,
1518 size_t prefix, ngx_http_proxy_redirect_t *pr)
1519 {
1520 size_t len;
1521 u_char *data, *p;
1522 ngx_http_script_code_pt code;
1523 ngx_http_script_engine_t e;
1524 ngx_http_script_len_code_pt lcode;
1525
1526 if (pr->redirect.len > h->value.len - prefix
1527 || ngx_rstrncmp(h->value.data + prefix, pr->redirect.data,
1528 pr->redirect.len) != 0)
1529 {
1530 return NGX_DECLINED;
1531 }
1532
1533 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
1534
1535 e.ip = pr->replacement.vars.lengths;
1536 e.request = r;
1537
1538 len = prefix + h->value.len - pr->redirect.len;
1539
1540 while (*(uintptr_t *) e.ip) {
1541 lcode = *(ngx_http_script_len_code_pt *) e.ip;
1542 len += lcode(&e);
1543 }
1544
1545 data = ngx_pnalloc(r->pool, len);
1546 if (data == NULL) {
1547 return NGX_ERROR;
1548 }
1549
1550 p = data;
1551
1552 p = ngx_copy(p, h->value.data, prefix);
1553
1554 e.ip = pr->replacement.vars.values;
1555 e.pos = p;
1556
1557 while (*(uintptr_t *) e.ip) {
1558 code = *(ngx_http_script_code_pt *) e.ip;
1559 code(&e);
1560 }
1561
1562 ngx_memcpy(e.pos, h->value.data + prefix + pr->redirect.len,
1563 h->value.len - pr->redirect.len - prefix);
1564
1565 h->value.len = len;
1566 h->value.data = data;
1567
1568 return NGX_OK;
1569 }
1570
1571
1572 static ngx_int_t
1573 ngx_http_proxy_add_variables(ngx_conf_t *cf)
1574 {
1575 ngx_http_variable_t *var, *v;
1576
1577 for (v = ngx_http_proxy_vars; v->name.len; v++) {
1578 var = ngx_http_add_variable(cf, &v->name, v->flags);
1579 if (var == NULL) {
1580 return NGX_ERROR;
1581 }
1582
1583 var->get_handler = v->get_handler;
1584 var->data = v->data;
1585 }
1586
1587 return NGX_OK;
1588 }
1589
1590
1591 static void *
1592 ngx_http_proxy_create_loc_conf(ngx_conf_t *cf)
1593 {
1594 ngx_http_proxy_loc_conf_t *conf;
1595
1596 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_proxy_loc_conf_t));
1597 if (conf == NULL) {
1598 return NGX_CONF_ERROR;
1599 }
1600
1601 /*
1602 * set by ngx_pcalloc():
1603 *
1604 * conf->upstream.bufs.num = 0;
1605 * conf->upstream.next_upstream = 0;
1606 * conf->upstream.temp_path = NULL;
1607 * conf->upstream.hide_headers_hash = { NULL, 0 };
1608 * conf->upstream.schema = { 0, NULL };
1609 * conf->upstream.uri = { 0, NULL };
1610 * conf->upstream.location = NULL;
1611 * conf->upstream.store_lengths = NULL;
1612 * conf->upstream.store_values = NULL;
1613 *
1614 * conf->method = NULL;
1615 * conf->headers_source = NULL;
1616 * conf->headers_set_len = NULL;
1617 * conf->headers_set = NULL;
1618 * conf->headers_set_hash = NULL;
1619 * conf->body_set_len = NULL;
1620 * conf->body_set = NULL;
1621 * conf->body_source = { 0, NULL };
1622 * conf->rewrite_locations = NULL;
1623 */
1624
1625 conf->upstream.store = NGX_CONF_UNSET;
1626 conf->upstream.store_access = NGX_CONF_UNSET_UINT;
1627 conf->upstream.buffering = NGX_CONF_UNSET;
1628 conf->upstream.ignore_client_abort = NGX_CONF_UNSET;
1629
1630 conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
1631 conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
1632 conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
1633
1634 conf->upstream.send_lowat = NGX_CONF_UNSET_SIZE;
1635 conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE;
1636
1637 conf->upstream.busy_buffers_size_conf = NGX_CONF_UNSET_SIZE;
1638 conf->upstream.max_temp_file_size_conf = NGX_CONF_UNSET_SIZE;
1639 conf->upstream.temp_file_write_size_conf = NGX_CONF_UNSET_SIZE;
1640
1641 conf->upstream.pass_request_headers = NGX_CONF_UNSET;
1642 conf->upstream.pass_request_body = NGX_CONF_UNSET;
1643
1644 conf->upstream.hide_headers = NGX_CONF_UNSET_PTR;
1645 conf->upstream.pass_headers = NGX_CONF_UNSET_PTR;
1646
1647 conf->upstream.intercept_errors = NGX_CONF_UNSET;
1648
1649 /* "proxy_cyclic_temp_file" is disabled */
1650 conf->upstream.cyclic_temp_file = 0;
1651
1652 conf->redirect = NGX_CONF_UNSET;
1653 conf->upstream.change_buffering = 1;
1654
1655 conf->headers_hash_max_size = NGX_CONF_UNSET_UINT;
1656 conf->headers_hash_bucket_size = NGX_CONF_UNSET_UINT;
1657
1658 return conf;
1659 }
1660
1661
1662 static char *
1663 ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
1664 {
1665 ngx_http_proxy_loc_conf_t *prev = parent;
1666 ngx_http_proxy_loc_conf_t *conf = child;
1667
1668 u_char *p;
1669 size_t size;
1670 uintptr_t *code;
1671 ngx_uint_t i;
1672 ngx_keyval_t *src, *s, *h;
1673 ngx_hash_key_t *hk;
1674 ngx_hash_init_t hash;
1675 ngx_http_proxy_redirect_t *pr;
1676 ngx_http_script_compile_t sc;
1677 ngx_http_script_copy_code_t *copy;
1678
1679 if (conf->upstream.store != 0) {
1680 ngx_conf_merge_value(conf->upstream.store,
1681 prev->upstream.store, 0);
1682
1683 if (conf->upstream.store_lengths == NULL) {
1684 conf->upstream.store_lengths = prev->upstream.store_lengths;
1685 conf->upstream.store_values = prev->upstream.store_values;
1686 }
1687 }
1688
1689 ngx_conf_merge_uint_value(conf->upstream.store_access,
1690 prev->upstream.store_access, 0600);
1691
1692 ngx_conf_merge_value(conf->upstream.buffering,
1693 prev->upstream.buffering, 1);
1694
1695 ngx_conf_merge_value(conf->upstream.ignore_client_abort,
1696 prev->upstream.ignore_client_abort, 0);
1697
1698 ngx_conf_merge_msec_value(conf->upstream.connect_timeout,
1699 prev->upstream.connect_timeout, 60000);
1700
1701 ngx_conf_merge_msec_value(conf->upstream.send_timeout,
1702 prev->upstream.send_timeout, 60000);
1703
1704 ngx_conf_merge_msec_value(conf->upstream.read_timeout,
1705 prev->upstream.read_timeout, 60000);
1706
1707 ngx_conf_merge_size_value(conf->upstream.send_lowat,
1708 prev->upstream.send_lowat, 0);
1709
1710 ngx_conf_merge_size_value(conf->upstream.buffer_size,
1711 prev->upstream.buffer_size,
1712 (size_t) ngx_pagesize);
1713
1714 ngx_conf_merge_bufs_value(conf->upstream.bufs, prev->upstream.bufs,
1715 8, ngx_pagesize);
1716
1717 if (conf->upstream.bufs.num < 2) {
1718 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1719 "there must be at least 2 \"proxy_buffers\"");
1720 return NGX_CONF_ERROR;
1721 }
1722
1723
1724 size = conf->upstream.buffer_size;
1725 if (size < conf->upstream.bufs.size) {
1726 size = conf->upstream.bufs.size;
1727 }
1728
1729
1730 ngx_conf_merge_size_value(conf->upstream.busy_buffers_size_conf,
1731 prev->upstream.busy_buffers_size_conf,
1732 NGX_CONF_UNSET_SIZE);
1733
1734 if (conf->upstream.busy_buffers_size_conf == NGX_CONF_UNSET_SIZE) {
1735 conf->upstream.busy_buffers_size = 2 * size;
1736 } else {
1737 conf->upstream.busy_buffers_size =
1738 conf->upstream.busy_buffers_size_conf;
1739 }
1740
1741 if (conf->upstream.busy_buffers_size < size) {
1742 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1743 "\"proxy_busy_buffers_size\" must be equal or bigger than "
1744 "maximum of the value of \"proxy_buffer_size\" and "
1745 "one of the \"proxy_buffers\"");
1746
1747 return NGX_CONF_ERROR;
1748 }
1749
1750 if (conf->upstream.busy_buffers_size
1751 > (conf->upstream.bufs.num - 1) * conf->upstream.bufs.size)
1752 {
1753 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1754 "\"proxy_busy_buffers_size\" must be less than "
1755 "the size of all \"proxy_buffers\" minus one buffer");
1756
1757 return NGX_CONF_ERROR;
1758 }
1759
1760
1761 ngx_conf_merge_size_value(conf->upstream.temp_file_write_size_conf,
1762 prev->upstream.temp_file_write_size_conf,
1763 NGX_CONF_UNSET_SIZE);
1764
1765 if (conf->upstream.temp_file_write_size_conf == NGX_CONF_UNSET_SIZE) {
1766 conf->upstream.temp_file_write_size = 2 * size;
1767 } else {
1768 conf->upstream.temp_file_write_size =
1769 conf->upstream.temp_file_write_size_conf;
1770 }
1771
1772 if (conf->upstream.temp_file_write_size < size) {
1773 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1774 "\"proxy_temp_file_write_size\" must be equal or bigger than "
1775 "maximum of the value of \"proxy_buffer_size\" and "
1776 "one of the \"proxy_buffers\"");
1777
1778 return NGX_CONF_ERROR;
1779 }
1780
1781 ngx_conf_merge_size_value(conf->upstream.max_temp_file_size_conf,
1782 prev->upstream.max_temp_file_size_conf,
1783 NGX_CONF_UNSET_SIZE);
1784
1785 if (conf->upstream.max_temp_file_size_conf == NGX_CONF_UNSET_SIZE) {
1786 conf->upstream.max_temp_file_size = 1024 * 1024 * 1024;
1787 } else {
1788 conf->upstream.max_temp_file_size =
1789 conf->upstream.max_temp_file_size_conf;
1790 }
1791
1792 if (conf->upstream.max_temp_file_size != 0
1793 && conf->upstream.max_temp_file_size < size)
1794 {
1795 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1796 "\"proxy_max_temp_file_size\" must be equal to zero to disable "
1797 "the temporary files usage or must be equal or bigger than "
1798 "maximum of the value of \"proxy_buffer_size\" and "
1799 "one of the \"proxy_buffers\"");
1800
1801 return NGX_CONF_ERROR;
1802 }
1803
1804
1805 ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
1806 prev->upstream.next_upstream,
1807 (NGX_CONF_BITMASK_SET
1808 |NGX_HTTP_UPSTREAM_FT_ERROR
1809 |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
1810
1811 if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
1812 conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
1813 |NGX_HTTP_UPSTREAM_FT_OFF;
1814 }
1815
1816 ngx_conf_merge_path_value(conf->upstream.temp_path,
1817 prev->upstream.temp_path,
1818 NGX_HTTP_PROXY_TEMP_PATH, 1, 2, 0,
1819 ngx_garbage_collector_temp_handler, cf);
1820
1821 if (conf->method.len == 0) {
1822 conf->method = prev->method;
1823
1824 } else {
1825 conf->method.data[conf->method.len] = ' ';
1826 conf->method.len++;
1827 }
1828
1829 ngx_conf_merge_value(conf->upstream.pass_request_headers,
1830 prev->upstream.pass_request_headers, 1);
1831 ngx_conf_merge_value(conf->upstream.pass_request_body,
1832 prev->upstream.pass_request_body, 1);
1833
1834 ngx_conf_merge_value(conf->upstream.intercept_errors,
1835 prev->upstream.intercept_errors, 0);
1836
1837 ngx_conf_merge_value(conf->redirect, prev->redirect, 1);
1838
1839 if (conf->redirect) {
1840
1841 if (conf->redirects == NULL) {
1842 conf->redirects = prev->redirects;
1843 }
1844
1845 if (conf->redirects == NULL && conf->url.data) {
1846
1847 conf->redirects = ngx_array_create(cf->pool, 1,
1848 sizeof(ngx_http_proxy_redirect_t));
1849 if (conf->redirects == NULL) {
1850 return NGX_CONF_ERROR;
1851 }
1852
1853 pr = ngx_array_push(conf->redirects);
1854 if (pr == NULL) {
1855 return NGX_CONF_ERROR;
1856 }
1857
1858 pr->handler = ngx_http_proxy_rewrite_redirect_text;
1859 pr->redirect = conf->url;
1860
1861 if (conf->vars.uri.len) {
1862 pr->replacement.text = conf->location;
1863
1864 } else {
1865 pr->replacement.text.len = 0;
1866 pr->replacement.text.data = NULL;
1867 }
1868 }
1869 }
1870
1871 /* STUB */
1872 if (prev->proxy_lengths) {
1873 conf->proxy_lengths = prev->proxy_lengths;
1874 conf->proxy_values = prev->proxy_values;
1875 }
1876
1877 ngx_conf_merge_uint_value(conf->headers_hash_max_size,
1878 prev->headers_hash_max_size, 512);
1879
1880 ngx_conf_merge_uint_value(conf->headers_hash_bucket_size,
1881 prev->headers_hash_bucket_size, 64);
1882
1883 conf->headers_hash_bucket_size = ngx_align(conf->headers_hash_bucket_size,
1884 ngx_cacheline_size);
1885
1886 hash.max_size = conf->headers_hash_max_size;
1887 hash.bucket_size = conf->headers_hash_bucket_size;
1888 hash.name = "proxy_headers_hash";
1889
1890 if (ngx_http_upstream_hide_headers_hash(cf, &conf->upstream,
1891 &prev->upstream,
1892 ngx_http_proxy_hide_headers, &hash)
1893 != NGX_OK)
1894 {
1895 return NGX_CONF_ERROR;
1896 }
1897
1898 if (conf->upstream.upstream == NULL) {
1899 conf->upstream.upstream = prev->upstream.upstream;
1900
1901 conf->vars = prev->vars;
1902 conf->upstream.schema = prev->upstream.schema;
1903 }
1904
1905
1906 if (conf->body_source.data == NULL) {
1907 conf->body_source = prev->body_source;
1908 conf->body_set_len = prev->body_set_len;
1909 conf->body_set = prev->body_set;
1910 }
1911
1912 if (conf->body_source.data && conf->body_set_len == NULL) {
1913
1914 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
1915
1916 sc.cf = cf;
1917 sc.source = &conf->body_source;
1918 sc.flushes = &conf->flushes;
1919 sc.lengths = &conf->body_set_len;
1920 sc.values = &conf->body_set;
1921 sc.complete_lengths = 1;
1922 sc.complete_values = 1;
1923
1924 if (ngx_http_script_compile(&sc) != NGX_OK) {
1925 return NGX_CONF_ERROR;
1926 }
1927
1928 if (conf->headers_source == NULL) {
1929 conf->headers_source = ngx_array_create(cf->pool, 4,
1930 sizeof(ngx_keyval_t));
1931 if (conf->headers_source == NULL) {
1932 return NGX_CONF_ERROR;
1933 }
1934 }
1935
1936 s = ngx_array_push(conf->headers_source);
1937 if (s == NULL) {
1938 return NGX_CONF_ERROR;
1939 }
1940
1941 s->key.len = sizeof("Content-Length") - 1;
1942 s->key.data = (u_char *) "Content-Length";
1943 s->value.len = sizeof("$proxy_internal_body_length") - 1;
1944 s->value.data = (u_char *) "$proxy_internal_body_length";
1945 }
1946
1947
1948 if (conf->headers_source == NULL) {
1949 conf->flushes = prev->flushes;
1950 conf->headers_set_len = prev->headers_set_len;
1951 conf->headers_set = prev->headers_set;
1952 conf->headers_set_hash = prev->headers_set_hash;
1953 conf->headers_source = prev->headers_source;
1954 }
1955
1956 if (conf->headers_set_hash.buckets) {
1957 return NGX_CONF_OK;
1958 }
1959
1960
1961 conf->headers_names = ngx_array_create(cf->pool, 4, sizeof(ngx_hash_key_t));
1962 if (conf->headers_names == NULL) {
1963 return NGX_CONF_ERROR;
1964 }
1965
1966 if (conf->headers_source == NULL) {
1967 conf->headers_source = ngx_array_create(cf->pool, 4,
1968 sizeof(ngx_keyval_t));
1969 if (conf->headers_source == NULL) {
1970 return NGX_CONF_ERROR;
1971 }
1972 }
1973
1974 conf->headers_set_len = ngx_array_create(cf->pool, 64, 1);
1975 if (conf->headers_set_len == NULL) {
1976 return NGX_CONF_ERROR;
1977 }
1978
1979 conf->headers_set = ngx_array_create(cf->pool, 512, 1);
1980 if (conf->headers_set == NULL) {
1981 return NGX_CONF_ERROR;
1982 }
1983
1984
1985 src = conf->headers_source->elts;
1986
1987 for (h = ngx_http_proxy_headers; h->key.len; h++) {
1988
1989 for (i = 0; i < conf->headers_source->nelts; i++) {
1990 if (ngx_strcasecmp(h->key.data, src[i].key.data) == 0) {
1991 goto next;
1992 }
1993 }
1994
1995 s = ngx_array_push(conf->headers_source);
1996 if (s == NULL) {
1997 return NGX_CONF_ERROR;
1998 }
1999
2000 *s = *h;
2001
2002 src = conf->headers_source->elts;
2003
2004 next:
2005
2006 continue;
2007 }
2008
2009
2010 src = conf->headers_source->elts;
2011 for (i = 0; i < conf->headers_source->nelts; i++) {
2012
2013 hk = ngx_array_push(conf->headers_names);
2014 if (hk == NULL) {
2015 return NGX_CONF_ERROR;
2016 }
2017
2018 hk->key = src[i].key;
2019 hk->key_hash = ngx_hash_key_lc(src[i].key.data, src[i].key.len);
2020 hk->value = (void *) 1;
2021
2022 if (src[i].value.len == 0) {
2023 continue;
2024 }
2025
2026 if (ngx_http_script_variables_count(&src[i].value) == 0) {
2027 copy = ngx_array_push_n(conf->headers_set_len,
2028 sizeof(ngx_http_script_copy_code_t));
2029 if (copy == NULL) {
2030 return NGX_CONF_ERROR;
2031 }
2032
2033 copy->code = (ngx_http_script_code_pt)
2034 ngx_http_script_copy_len_code;
2035 copy->len = src[i].key.len + sizeof(": ") - 1
2036 + src[i].value.len + sizeof(CRLF) - 1;
2037
2038
2039 size = (sizeof(ngx_http_script_copy_code_t)
2040 + src[i].key.len + sizeof(": ") - 1
2041 + src[i].value.len + sizeof(CRLF) - 1
2042 + sizeof(uintptr_t) - 1)
2043 & ~(sizeof(uintptr_t) - 1);
2044
2045 copy = ngx_array_push_n(conf->headers_set, size);
2046 if (copy == NULL) {
2047 return NGX_CONF_ERROR;
2048 }
2049
2050 copy->code = ngx_http_script_copy_code;
2051 copy->len = src[i].key.len + sizeof(": ") - 1
2052 + src[i].value.len + sizeof(CRLF) - 1;
2053
2054 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
2055
2056 p = ngx_cpymem(p, src[i].key.data, src[i].key.len);
2057 *p++ = ':'; *p++ = ' ';
2058 p = ngx_cpymem(p, src[i].value.data, src[i].value.len);
2059 *p++ = CR; *p = LF;
2060
2061 } else {
2062 copy = ngx_array_push_n(conf->headers_set_len,
2063 sizeof(ngx_http_script_copy_code_t));
2064 if (copy == NULL) {
2065 return NGX_CONF_ERROR;
2066 }
2067
2068 copy->code = (ngx_http_script_code_pt)
2069 ngx_http_script_copy_len_code;
2070 copy->len = src[i].key.len + sizeof(": ") - 1;
2071
2072
2073 size = (sizeof(ngx_http_script_copy_code_t)
2074 + src[i].key.len + sizeof(": ") - 1 + sizeof(uintptr_t) - 1)
2075 & ~(sizeof(uintptr_t) - 1);
2076
2077 copy = ngx_array_push_n(conf->headers_set, size);
2078 if (copy == NULL) {
2079 return NGX_CONF_ERROR;
2080 }
2081
2082 copy->code = ngx_http_script_copy_code;
2083 copy->len = src[i].key.len + sizeof(": ") - 1;
2084
2085 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
2086 p = ngx_cpymem(p, src[i].key.data, src[i].key.len);
2087 *p++ = ':'; *p = ' ';
2088
2089
2090 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2091
2092 sc.cf = cf;
2093 sc.source = &src[i].value;
2094 sc.flushes = &conf->flushes;
2095 sc.lengths = &conf->headers_set_len;
2096 sc.values = &conf->headers_set;
2097
2098 if (ngx_http_script_compile(&sc) != NGX_OK) {
2099 return NGX_CONF_ERROR;
2100 }
2101
2102
2103 copy = ngx_array_push_n(conf->headers_set_len,
2104 sizeof(ngx_http_script_copy_code_t));
2105 if (copy == NULL) {
2106 return NGX_CONF_ERROR;
2107 }
2108
2109 copy->code = (ngx_http_script_code_pt)
2110 ngx_http_script_copy_len_code;
2111 copy->len = sizeof(CRLF) - 1;
2112
2113
2114 size = (sizeof(ngx_http_script_copy_code_t)
2115 + sizeof(CRLF) - 1 + sizeof(uintptr_t) - 1)
2116 & ~(sizeof(uintptr_t) - 1);
2117
2118 copy = ngx_array_push_n(conf->headers_set, size);
2119 if (copy == NULL) {
2120 return NGX_CONF_ERROR;
2121 }
2122
2123 copy->code = ngx_http_script_copy_code;
2124 copy->len = sizeof(CRLF) - 1;
2125
2126 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
2127 *p++ = CR; *p = LF;
2128 }
2129
2130 code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t));
2131 if (code == NULL) {
2132 return NGX_CONF_ERROR;
2133 }
2134
2135 *code = (uintptr_t) NULL;
2136
2137 code = ngx_array_push_n(conf->headers_set, sizeof(uintptr_t));
2138 if (code == NULL) {
2139 return NGX_CONF_ERROR;
2140 }
2141
2142 *code = (uintptr_t) NULL;
2143 }
2144
2145 code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t));
2146 if (code == NULL) {
2147 return NGX_CONF_ERROR;
2148 }
2149
2150 *code = (uintptr_t) NULL;
2151
2152
2153 hash.hash = &conf->headers_set_hash;
2154 hash.key = ngx_hash_key_lc;
2155 hash.max_size = conf->headers_hash_max_size;
2156 hash.bucket_size = conf->headers_hash_bucket_size;
2157 hash.name = "proxy_headers_hash";
2158 hash.pool = cf->pool;
2159 hash.temp_pool = NULL;
2160
2161 if (ngx_hash_init(&hash, conf->headers_names->elts,
2162 conf->headers_names->nelts)
2163 != NGX_OK)
2164 {
2165 return NGX_CONF_ERROR;
2166 }
2167
2168 return NGX_CONF_OK;
2169 }
2170
2171
2172 static char *
2173 ngx_http_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2174 {
2175 ngx_http_proxy_loc_conf_t *plcf = conf;
2176
2177 size_t add;
2178 u_short port;
2179 ngx_str_t *value, *url;
2180 ngx_url_t u;
2181 ngx_uint_t n;
2182 ngx_http_core_loc_conf_t *clcf;
2183 ngx_http_script_compile_t sc;
2184
2185 if (plcf->upstream.schema.len) {
2186 return "is duplicate";
2187 }
2188
2189 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
2190
2191 value = cf->args->elts;
2192
2193 url = &value[1];
2194
2195 n = ngx_http_script_variables_count(url);
2196
2197 if (n) {
2198
2199 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2200
2201 sc.cf = cf;
2202 sc.source = url;
2203 sc.lengths = &plcf->proxy_lengths;
2204 sc.values = &plcf->proxy_values;
2205 sc.variables = n;
2206 sc.complete_lengths = 1;
2207 sc.complete_values = 1;
2208
2209 if (ngx_http_script_compile(&sc) != NGX_OK) {
2210 return NGX_CONF_ERROR;
2211 }
2212
2213 #if (NGX_HTTP_SSL)
2214 if (ngx_http_proxy_set_ssl(cf, plcf) != NGX_OK) {
2215 return NGX_CONF_ERROR;
2216 }
2217 #endif
2218
2219 clcf->handler = ngx_http_proxy_handler;
2220
2221 return NGX_CONF_OK;
2222 }
2223
2224 if (ngx_strncasecmp(url->data, (u_char *) "http://", 7) == 0) {
2225 add = 7;
2226 port = 80;
2227
2228 } else if (ngx_strncasecmp(url->data, (u_char *) "https://", 8) == 0) {
2229
2230 #if (NGX_HTTP_SSL)
2231 if (ngx_http_proxy_set_ssl(cf, plcf) != NGX_OK) {
2232 return NGX_CONF_ERROR;
2233 }
2234
2235 add = 8;
2236 port = 443;
2237 #else
2238 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2239 "https protocol requires SSL support");
2240 return NGX_CONF_ERROR;
2241 #endif
2242
2243 } else {
2244 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid URL prefix");
2245 return NGX_CONF_ERROR;
2246 }
2247
2248 ngx_memzero(&u, sizeof(ngx_url_t));
2249
2250 u.url.len = url->len - add;
2251 u.url.data = url->data + add;
2252 u.default_port = port;
2253 u.uri_part = 1;
2254 u.no_resolve = 1;
2255
2256 plcf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0);
2257 if (plcf->upstream.upstream == NULL) {
2258 return NGX_CONF_ERROR;
2259 }
2260
2261 if (ngx_http_proxy_set_vars(cf->pool, &u, &plcf->vars) != NGX_OK) {
2262 return NGX_CONF_ERROR;
2263 }
2264
2265 plcf->upstream.schema.len = add;
2266 plcf->upstream.schema.data = url->data;
2267 plcf->location = clcf->name;
2268
2269 clcf->handler = ngx_http_proxy_handler;
2270
2271 if (clcf->named
2272 #if (NGX_PCRE)
2273 || clcf->regex
2274 #endif
2275 || clcf->noname)
2276 {
2277 if (plcf->vars.uri.len) {
2278 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2279 "\"proxy_pass\" may not have URI part in "
2280 "location given by regular expression, "
2281 "or inside named location, "
2282 "or inside the \"if\" statement, "
2283 "or inside the \"limit_except\" block");
2284 return NGX_CONF_ERROR;
2285 }
2286
2287 plcf->location.len = 0;
2288 }
2289
2290 plcf->url = *url;
2291
2292 if (clcf->name.data[clcf->name.len - 1] == '/') {
2293 clcf->auto_redirect = 1;
2294 }
2295
2296 return NGX_CONF_OK;
2297 }
2298
2299
2300 static char *
2301 ngx_http_proxy_redirect(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2302 {
2303 ngx_http_proxy_loc_conf_t *plcf = conf;
2304
2305 ngx_str_t *value;
2306 ngx_array_t *vars_lengths, *vars_values;
2307 ngx_http_script_compile_t sc;
2308 ngx_http_proxy_redirect_t *pr;
2309
2310 if (plcf->redirect == 0) {
2311 return NGX_CONF_OK;
2312 }
2313
2314 value = cf->args->elts;
2315
2316 if (ngx_strcmp(value[1].data, "off") == 0) {
2317 plcf->redirect = 0;
2318 plcf->redirects = NULL;
2319 return NGX_CONF_OK;
2320 }
2321
2322 if (plcf->redirects == NULL) {
2323 plcf->redirects = ngx_array_create(cf->pool, 1,
2324 sizeof(ngx_http_proxy_redirect_t));
2325 if (plcf->redirects == NULL) {
2326 return NGX_CONF_ERROR;
2327 }
2328 }
2329
2330 pr = ngx_array_push(plcf->redirects);
2331 if (pr == NULL) {
2332 return NGX_CONF_ERROR;
2333 }
2334
2335 if (cf->args->nelts == 2 && ngx_strcmp(value[1].data, "default") == 0) {
2336 if (plcf->url.data == NULL) {
2337 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2338 "\"proxy_rewrite_location default\" must go "
2339 "after the \"proxy_pass\" directive");
2340 return NGX_CONF_ERROR;
2341 }
2342
2343 pr->handler = ngx_http_proxy_rewrite_redirect_text;
2344 pr->redirect = plcf->url;
2345
2346 if (plcf->vars.uri.len) {
2347 pr->replacement.text = plcf->location;
2348
2349 } else {
2350 pr->replacement.text.len = 0;
2351 pr->replacement.text.data = NULL;
2352 }
2353
2354 return NGX_CONF_OK;
2355 }
2356
2357 if (ngx_http_script_variables_count(&value[2]) == 0) {
2358 pr->handler = ngx_http_proxy_rewrite_redirect_text;
2359 pr->redirect = value[1];
2360 pr->replacement.text = value[2];
2361
2362 return NGX_CONF_OK;
2363 }
2364
2365 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2366
2367 vars_lengths = NULL;
2368 vars_values = NULL;
2369
2370 sc.cf = cf;
2371 sc.source = &value[2];
2372 sc.lengths = &vars_lengths;
2373 sc.values = &vars_values;
2374 sc.complete_lengths = 1;
2375 sc.complete_values = 1;
2376
2377 if (ngx_http_script_compile(&sc) != NGX_OK) {
2378 return NGX_CONF_ERROR;
2379 }
2380
2381 pr->handler = ngx_http_proxy_rewrite_redirect_vars;
2382 pr->redirect = value[1];
2383 pr->replacement.vars.lengths = vars_lengths->elts;
2384 pr->replacement.vars.values = vars_values->elts;
2385
2386 return NGX_CONF_OK;
2387 }
2388
2389
2390 static char *
2391 ngx_http_proxy_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2392 {
2393 ngx_http_proxy_loc_conf_t *plcf = conf;
2394
2395 ngx_str_t *value;
2396 ngx_http_script_compile_t sc;
2397
2398 if (plcf->upstream.store != NGX_CONF_UNSET || plcf->upstream.store_lengths)
2399 {
2400 return "is duplicate";
2401 }
2402
2403 value = cf->args->elts;
2404
2405 if (ngx_strcmp(value[1].data, "on") == 0) {
2406 plcf->upstream.store = 1;
2407 return NGX_CONF_OK;
2408 }
2409
2410 if (ngx_strcmp(value[1].data, "off") == 0) {
2411 plcf->upstream.store = 0;
2412 return NGX_CONF_OK;
2413 }
2414
2415 /* include the terminating '\0' into script */
2416 value[1].len++;
2417
2418 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2419
2420 sc.cf = cf;
2421 sc.source = &value[1];
2422 sc.lengths = &plcf->upstream.store_lengths;
2423 sc.values = &plcf->upstream.store_values;
2424 sc.variables = ngx_http_script_variables_count(&value[1]);
2425 sc.complete_lengths = 1;
2426 sc.complete_values = 1;
2427
2428 if (ngx_http_script_compile(&sc) != NGX_OK) {
2429 return NGX_CONF_ERROR;
2430 }
2431
2432 return NGX_CONF_OK;
2433 }
2434
2435
2436 static char *
2437 ngx_http_proxy_lowat_check(ngx_conf_t *cf, void *post, void *data)
2438 {
2439 #if (NGX_FREEBSD)
2440 ssize_t *np = data;
2441
2442 if ((u_long) *np >= ngx_freebsd_net_inet_tcp_sendspace) {
2443 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2444 "\"proxy_send_lowat\" must be less than %d "
2445 "(sysctl net.inet.tcp.sendspace)",
2446 ngx_freebsd_net_inet_tcp_sendspace);
2447
2448 return NGX_CONF_ERROR;
2449 }
2450
2451 #elif !(NGX_HAVE_SO_SNDLOWAT)
2452 ssize_t *np = data;
2453
2454 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
2455 "\"proxy_send_lowat\" is not supported, ignored");
2456
2457 *np = 0;
2458
2459 #endif
2460
2461 return NGX_CONF_OK;
2462 }
2463
2464
2465 static char *
2466 ngx_http_proxy_upstream_max_fails_unsupported(ngx_conf_t *cf,
2467 ngx_command_t *cmd, void *conf)
2468 {
2469 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2470 "\"proxy_upstream_max_fails\" is not supported, "
2471 "use the \"max_fails\" parameter of the \"server\" directive ",
2472 "inside the \"upstream\" block");
2473
2474 return NGX_CONF_ERROR;
2475 }
2476
2477
2478 static char *
2479 ngx_http_proxy_upstream_fail_timeout_unsupported(ngx_conf_t *cf,
2480 ngx_command_t *cmd, void *conf)
2481 {
2482 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2483 "\"proxy_upstream_fail_timeout\" is not supported, "
2484 "use the \"fail_timeout\" parameter of the \"server\" directive ",
2485 "inside the \"upstream\" block");
2486
2487 return NGX_CONF_ERROR;
2488 }
2489
2490
2491 #if (NGX_HTTP_SSL)
2492
2493 static ngx_int_t
2494 ngx_http_proxy_set_ssl(ngx_conf_t *cf, ngx_http_proxy_loc_conf_t *plcf)
2495 {
2496 ngx_pool_cleanup_t *cln;
2497
2498 plcf->upstream.ssl = ngx_pcalloc(cf->pool, sizeof(ngx_ssl_t));
2499 if (plcf->upstream.ssl == NULL) {
2500 return NGX_ERROR;
2501 }
2502
2503 plcf->upstream.ssl->log = cf->log;
2504
2505 if (ngx_ssl_create(plcf->upstream.ssl,
2506 NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1, NULL)
2507 != NGX_OK)
2508 {
2509 return NGX_ERROR;
2510 }
2511
2512 cln = ngx_pool_cleanup_add(cf->pool, 0);
2513 if (cln == NULL) {
2514 return NGX_ERROR;
2515 }
2516
2517 cln->handler = ngx_ssl_cleanup_ctx;
2518 cln->data = plcf->upstream.ssl;
2519
2520 return NGX_OK;
2521 }
2522
2523 #endif
2524
2525
2526 static ngx_int_t
2527 ngx_http_proxy_set_vars(ngx_pool_t *pool, ngx_url_t *u,
2528 ngx_http_proxy_vars_t *v)
2529 {
2530 if (!u->unix_socket) {
2531 if (u->no_port || u->port == u->default_port) {
2532 v->host_header = u->host;
2533
2534 if (u->default_port == 80) {
2535 v->port.len = sizeof("80") - 1;
2536 v->port.data = (u_char *) "80";
2537
2538 } else {
2539 v->port.len = sizeof("443") - 1;
2540 v->port.data = (u_char *) "443";
2541 }
2542
2543 } else {
2544 v->host_header.len = u->host.len + 1 + u->port_text.len;
2545 v->host_header.data = u->host.data;
2546 v->port = u->port_text;
2547 }
2548
2549 } else {
2550 v->host_header.len = sizeof("localhost") - 1;
2551 v->host_header.data = (u_char *) "localhost";
2552 v->port.len = 0;
2553 v->port.data = (u_char *) "";
2554 }
2555
2556 v->uri = u->uri;
2557
2558 return NGX_OK;
2559 }
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