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comparison src/http/modules/ngx_http_proxy_module.c @ 58:b55cbf18157e NGINX_0_1_29

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nginx 0.1.29 *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; bug appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
author Igor Sysoev <http://sysoev.ru>
date Thu, 12 May 2005 00:00:00 +0400
parents
children 5db440287648
comparison
equal deleted inserted replaced
57:5df375c55338 58:b55cbf18157e
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_http_upstream_conf_t upstream;
37
38 ngx_peers_t *peers;
39
40 ngx_array_t *headers_set_len;
41 ngx_array_t *headers_set;
42 ngx_hash_t *headers_set_hash;
43
44 ngx_array_t *headers_source;
45 ngx_array_t *headers_names;
46
47 ngx_array_t *redirects;
48
49 ngx_str_t host_header;
50 ngx_str_t port_text;
51
52 ngx_flag_t redirect;
53 } ngx_http_proxy_loc_conf_t;
54
55
56 typedef struct {
57 ngx_uint_t status;
58 ngx_uint_t status_count;
59 u_char *status_start;
60 u_char *status_end;
61 } ngx_http_proxy_ctx_t;
62
63
64 #define NGX_HTTP_PROXY_PARSE_NO_HEADER 20
65
66
67 static ngx_int_t ngx_http_proxy_create_request(ngx_http_request_t *r);
68 static ngx_int_t ngx_http_proxy_reinit_request(ngx_http_request_t *r);
69 static ngx_int_t ngx_http_proxy_process_status_line(ngx_http_request_t *r);
70 static ngx_int_t ngx_http_proxy_parse_status_line(ngx_http_request_t *r,
71 ngx_http_proxy_ctx_t *p);
72 static ngx_int_t ngx_http_proxy_process_header(ngx_http_request_t *r);
73 static void ngx_http_proxy_abort_request(ngx_http_request_t *r);
74 static void ngx_http_proxy_finalize_request(ngx_http_request_t *r,
75 ngx_int_t rc);
76
77 static ngx_http_variable_value_t *
78 ngx_http_proxy_host_variable(ngx_http_request_t *r, uintptr_t data);
79 static ngx_http_variable_value_t *
80 ngx_http_proxy_port_variable(ngx_http_request_t *r, uintptr_t data);
81 static ngx_http_variable_value_t *
82 ngx_http_proxy_add_x_forwarded_for_variable(ngx_http_request_t *r,
83 uintptr_t data);
84 static ngx_int_t ngx_http_proxy_rewrite_redirect(ngx_http_request_t *r,
85 ngx_table_elt_t *h, size_t prefix);
86
87 static ngx_int_t ngx_http_proxy_add_variables(ngx_conf_t *cf);
88 static void *ngx_http_proxy_create_loc_conf(ngx_conf_t *cf);
89 static char *ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf,
90 void *parent, void *child);
91
92 static char *ngx_http_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd,
93 void *conf);
94 static char *ngx_http_proxy_redirect(ngx_conf_t *cf, ngx_command_t *cmd,
95 void *conf);
96
97 static char *ngx_http_proxy_lowat_check(ngx_conf_t *cf, void *post, void *data);
98
99
100 static ngx_conf_post_t ngx_http_proxy_lowat_post =
101 { ngx_http_proxy_lowat_check };
102
103 static ngx_conf_enum_t ngx_http_proxy_set_methods[] = {
104 { ngx_string("get"), NGX_HTTP_GET },
105 { ngx_null_string, 0 }
106 };
107
108 static ngx_conf_bitmask_t ngx_http_proxy_next_upstream_masks[] = {
109 { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR },
110 { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
111 { ngx_string("invalid_header"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
112 { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 },
113 { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
114 { ngx_null_string, 0 }
115 };
116
117
118 static ngx_command_t ngx_http_proxy_commands[] = {
119
120 { ngx_string("proxy_pass"),
121 NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
122 ngx_http_proxy_pass,
123 NGX_HTTP_LOC_CONF_OFFSET,
124 0,
125 NULL },
126
127 { ngx_string("proxy_redirect"),
128 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
129 ngx_http_proxy_redirect,
130 NGX_HTTP_LOC_CONF_OFFSET,
131 0,
132 NULL },
133
134 { ngx_string("proxy_connect_timeout"),
135 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
136 ngx_conf_set_msec_slot,
137 NGX_HTTP_LOC_CONF_OFFSET,
138 offsetof(ngx_http_proxy_loc_conf_t, upstream.connect_timeout),
139 NULL },
140
141 { ngx_string("proxy_send_timeout"),
142 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
143 ngx_conf_set_msec_slot,
144 NGX_HTTP_LOC_CONF_OFFSET,
145 offsetof(ngx_http_proxy_loc_conf_t, upstream.send_timeout),
146 NULL },
147
148 { ngx_string("proxy_send_lowat"),
149 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
150 ngx_conf_set_size_slot,
151 NGX_HTTP_LOC_CONF_OFFSET,
152 offsetof(ngx_http_proxy_loc_conf_t, upstream.send_lowat),
153 &ngx_http_proxy_lowat_post },
154
155 { ngx_string("proxy_redirect_errors"),
156 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
157 ngx_conf_set_flag_slot,
158 NGX_HTTP_LOC_CONF_OFFSET,
159 offsetof(ngx_http_proxy_loc_conf_t, upstream.redirect_errors),
160 NULL },
161
162 { ngx_string("proxy_pass_unparsed_uri"),
163 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
164 ngx_conf_set_flag_slot,
165 NGX_HTTP_LOC_CONF_OFFSET,
166 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_unparsed_uri),
167 NULL },
168
169 { ngx_string("proxy_set_header"),
170 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
171 ngx_conf_set_table_elt_slot,
172 NGX_HTTP_LOC_CONF_OFFSET,
173 offsetof(ngx_http_proxy_loc_conf_t, headers_source),
174 NULL },
175
176 { ngx_string("proxy_method"),
177 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
178 ngx_conf_set_enum_slot,
179 NGX_HTTP_LOC_CONF_OFFSET,
180 offsetof(ngx_http_proxy_loc_conf_t, upstream.method),
181 ngx_http_proxy_set_methods },
182
183 { ngx_string("proxy_pass_request_headers"),
184 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
185 ngx_conf_set_flag_slot,
186 NGX_HTTP_LOC_CONF_OFFSET,
187 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_request_headers),
188 NULL },
189
190 { ngx_string("proxy_pass_request_body"),
191 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
192 ngx_conf_set_flag_slot,
193 NGX_HTTP_LOC_CONF_OFFSET,
194 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_request_body),
195 NULL },
196
197 { ngx_string("proxy_header_buffer_size"),
198 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
199 ngx_conf_set_size_slot,
200 NGX_HTTP_LOC_CONF_OFFSET,
201 offsetof(ngx_http_proxy_loc_conf_t, upstream.header_buffer_size),
202 NULL },
203
204 { ngx_string("proxy_read_timeout"),
205 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
206 ngx_conf_set_msec_slot,
207 NGX_HTTP_LOC_CONF_OFFSET,
208 offsetof(ngx_http_proxy_loc_conf_t, upstream.read_timeout),
209 NULL },
210
211 { ngx_string("proxy_buffers"),
212 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
213 ngx_conf_set_bufs_slot,
214 NGX_HTTP_LOC_CONF_OFFSET,
215 offsetof(ngx_http_proxy_loc_conf_t, upstream.bufs),
216 NULL },
217
218 { ngx_string("proxy_busy_buffers_size"),
219 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
220 ngx_conf_set_size_slot,
221 NGX_HTTP_LOC_CONF_OFFSET,
222 offsetof(ngx_http_proxy_loc_conf_t, upstream.busy_buffers_size),
223 NULL },
224
225 { ngx_string("proxy_temp_path"),
226 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
227 ngx_conf_set_path_slot,
228 NGX_HTTP_LOC_CONF_OFFSET,
229 offsetof(ngx_http_proxy_loc_conf_t, upstream.temp_path),
230 (void *) ngx_garbage_collector_temp_handler },
231
232 { ngx_string("proxy_max_temp_file_size"),
233 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
234 ngx_conf_set_size_slot,
235 NGX_HTTP_LOC_CONF_OFFSET,
236 offsetof(ngx_http_proxy_loc_conf_t, upstream.max_temp_file_size),
237 NULL },
238
239 { ngx_string("proxy_temp_file_write_size"),
240 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
241 ngx_conf_set_size_slot,
242 NGX_HTTP_LOC_CONF_OFFSET,
243 offsetof(ngx_http_proxy_loc_conf_t, upstream.temp_file_write_size),
244 NULL },
245
246 { ngx_string("proxy_next_upstream"),
247 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ANY,
248 ngx_conf_set_bitmask_slot,
249 NGX_HTTP_LOC_CONF_OFFSET,
250 offsetof(ngx_http_proxy_loc_conf_t, upstream.next_upstream),
251 &ngx_http_proxy_next_upstream_masks },
252
253 { ngx_string("proxy_pass_x_powered_by"),
254 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
255 ngx_conf_set_flag_slot,
256 NGX_HTTP_LOC_CONF_OFFSET,
257 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_x_powered_by),
258 NULL },
259
260 { ngx_string("proxy_pass_server"),
261 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
262 ngx_conf_set_flag_slot,
263 NGX_HTTP_LOC_CONF_OFFSET,
264 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_server),
265 NULL },
266
267 { ngx_string("proxy_pass_x_accel_expires"),
268 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
269 ngx_conf_set_flag_slot,
270 NGX_HTTP_LOC_CONF_OFFSET,
271 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_x_accel_expires),
272 NULL },
273
274 ngx_null_command
275 };
276
277
278 ngx_http_module_t ngx_http_proxy_module_ctx = {
279 ngx_http_proxy_add_variables, /* preconfiguration */
280 NULL, /* postconfiguration */
281
282 NULL, /* create main configuration */
283 NULL, /* init main configuration */
284
285 NULL, /* create server configuration */
286 NULL, /* merge server configuration */
287
288 ngx_http_proxy_create_loc_conf, /* create location configration */
289 ngx_http_proxy_merge_loc_conf /* merge location configration */
290 };
291
292
293 ngx_module_t ngx_http_proxy_module = {
294 NGX_MODULE_V1,
295 &ngx_http_proxy_module_ctx, /* module context */
296 ngx_http_proxy_commands, /* module directives */
297 NGX_HTTP_MODULE, /* module type */
298 NULL, /* init module */
299 NULL /* init process */
300 };
301
302
303 static ngx_str_t ngx_http_proxy_methods[] = {
304 ngx_string("GET "),
305 ngx_string("HEAD "),
306 ngx_string("POST ")
307 };
308
309
310 static char ngx_http_proxy_version[] = " HTTP/1.0" CRLF;
311
312
313 static ngx_table_elt_t ngx_http_proxy_headers[] = {
314 { 0, ngx_string("Host"), ngx_string("$proxy_host"), },
315 { 0, ngx_string("Connection"), ngx_string("close"), },
316 { 0, ngx_null_string, ngx_null_string }
317 };
318
319
320 static ngx_http_variable_t ngx_http_proxy_vars[] = {
321
322 { ngx_string("proxy_host"), ngx_http_proxy_host_variable, 0,
323 NGX_HTTP_VAR_CHANGABLE },
324
325 { ngx_string("proxy_port"), ngx_http_proxy_port_variable, 0,
326 NGX_HTTP_VAR_CHANGABLE },
327
328 { ngx_string("proxy_add_x_forwarded_for"),
329 ngx_http_proxy_add_x_forwarded_for_variable, 0, 0 },
330
331 #if 0
332 { ngx_string("proxy_add_via"), NULL, 0, 0 },
333 #endif
334
335 { ngx_null_string, NULL, 0, 0 }
336 };
337
338
339 #if (NGX_PCRE)
340 static ngx_str_t ngx_http_proxy_uri = ngx_string("/");
341 #endif
342
343
344 static ngx_int_t
345 ngx_http_proxy_handler(ngx_http_request_t *r)
346 {
347 ngx_int_t rc;
348 ngx_http_upstream_t *u;
349 ngx_http_proxy_loc_conf_t *plcf;
350
351 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
352
353 u = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_t));
354 if (u == NULL) {
355 return NGX_HTTP_INTERNAL_SERVER_ERROR;
356 }
357
358 u->peer.log = r->connection->log;
359 u->peer.log_error = NGX_ERROR_ERR;
360 u->peer.peers = plcf->peers;
361 u->peer.tries = plcf->peers->number;
362 #if (NGX_THREADS)
363 u->peer.lock = &r->connection->lock;
364 #endif
365
366 u->output.tag = (ngx_buf_tag_t) &ngx_http_proxy_module;
367
368 u->conf = &plcf->upstream;
369
370 u->create_request = ngx_http_proxy_create_request;
371 u->reinit_request = ngx_http_proxy_reinit_request;
372 u->process_header = ngx_http_proxy_process_status_line;
373 u->abort_request = ngx_http_proxy_abort_request;
374 u->finalize_request = ngx_http_proxy_finalize_request;
375
376 if (plcf->redirects) {
377 u->rewrite_redirect = ngx_http_proxy_rewrite_redirect;
378 }
379
380 u->pipe.input_filter = ngx_event_pipe_copy_input_filter;
381
382 u->accel = 1;
383
384 r->upstream = u;
385
386 rc = ngx_http_read_client_request_body(r, ngx_http_upstream_init);
387
388 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
389 return rc;
390 }
391
392 return NGX_DONE;
393 }
394
395
396 static ngx_int_t
397 ngx_http_proxy_create_request(ngx_http_request_t *r)
398 {
399 size_t len, loc_len;
400 ngx_uint_t i, key;
401 uintptr_t escape;
402 ngx_buf_t *b;
403 ngx_str_t *hh;
404 ngx_chain_t *cl, *body;
405 ngx_list_part_t *part;
406 ngx_table_elt_t *header;
407 ngx_http_upstream_t *u;
408 ngx_http_script_code_pt code;
409 ngx_http_script_engine_t e, le;
410 ngx_http_proxy_loc_conf_t *plcf;
411 ngx_http_script_len_code_pt lcode;
412
413 u = r->upstream;
414
415 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
416
417 len = sizeof(ngx_http_proxy_version) - 1 + sizeof(CRLF) - 1;
418
419 if (u->method) {
420 len += ngx_http_proxy_methods[u->method - 1].len + u->conf->uri.len;
421 } else {
422 len += r->method_name.len + 1 + u->conf->uri.len;
423 }
424
425 escape = 0;
426
427 loc_len = r->valid_location ? u->conf->location->len : 1;
428
429 if (plcf->upstream.pass_unparsed_uri && r->valid_unparsed_uri) {
430 len += r->unparsed_uri.len - 1;
431
432 } else {
433 if (r->quoted_uri) {
434 escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len,
435 r->uri.len - loc_len, NGX_ESCAPE_URI);
436 }
437
438 len += r->uri.len - loc_len + escape + sizeof("?") - 1 + r->args.len;
439 }
440
441 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
442
443 le.ip = plcf->headers_set_len->elts;
444 le.request = r;
445
446 while (*(uintptr_t *) le.ip) {
447 while (*(uintptr_t *) le.ip) {
448 lcode = *(ngx_http_script_len_code_pt *) le.ip;
449 len += lcode(&le);
450 }
451 le.ip += sizeof(uintptr_t);
452 }
453
454
455 hh = (ngx_str_t *) plcf->headers_set_hash->buckets;
456
457 if (plcf->upstream.pass_request_headers) {
458 part = &r->headers_in.headers.part;
459 header = part->elts;
460
461 for (i = 0; /* void */; i++) {
462
463 if (i >= part->nelts) {
464 if (part->next == NULL) {
465 break;
466 }
467
468 part = part->next;
469 header = part->elts;
470 i = 0;
471 }
472
473 key = header[i].hash % plcf->headers_set_hash->hash_size;
474
475 if (hh[key].len == header[i].key.len
476 && ngx_strcasecmp(hh[key].data, header[i].key.data) == 0)
477 {
478 continue;
479 }
480
481 len += header[i].key.len + sizeof(": ") - 1
482 + header[i].value.len + sizeof(CRLF) - 1;
483 }
484 }
485
486
487 b = ngx_create_temp_buf(r->pool, len);
488 if (b == NULL) {
489 return NGX_ERROR;
490 }
491
492 cl = ngx_alloc_chain_link(r->pool);
493 if (cl == NULL) {
494 return NGX_ERROR;
495 }
496
497 cl->buf = b;
498
499
500 /* the request line */
501
502 if (u->method) {
503 b->last = ngx_cpymem(b->last,
504 ngx_http_proxy_methods[u->method - 1].data,
505 ngx_http_proxy_methods[u->method - 1].len);
506 } else {
507 b->last = ngx_cpymem(b->last, r->method_name.data,
508 r->method_name.len + 1);
509 }
510
511 b->last = ngx_cpymem(b->last, u->conf->uri.data, u->conf->uri.len);
512
513 if (plcf->upstream.pass_unparsed_uri && r->valid_unparsed_uri) {
514 b->last = ngx_cpymem(b->last, r->unparsed_uri.data + 1,
515 r->unparsed_uri.len - 1);
516 } else {
517 if (escape) {
518 ngx_escape_uri(b->last, r->uri.data + loc_len,
519 r->uri.len - loc_len, NGX_ESCAPE_URI);
520 b->last += r->uri.len - loc_len + escape;
521
522 } else {
523 b->last = ngx_cpymem(b->last, r->uri.data + loc_len,
524 r->uri.len - loc_len);
525 }
526
527 if (r->args.len > 0) {
528 *b->last++ = '?';
529 b->last = ngx_cpymem(b->last, r->args.data, r->args.len);
530 }
531 }
532
533 b->last = ngx_cpymem(b->last, ngx_http_proxy_version,
534 sizeof(ngx_http_proxy_version) - 1);
535
536
537 e.ip = plcf->headers_set->elts;
538 e.pos = b->last;
539 e.request = r;
540
541 le.ip = plcf->headers_set_len->elts;
542
543 while (*(uintptr_t *) le.ip) {
544 lcode = *(ngx_http_script_len_code_pt *) le.ip;
545 lcode(&le);
546
547 if (*(ngx_http_script_len_code_pt *) le.ip) {
548
549 for (len = 0; *(uintptr_t *) le.ip; len += lcode(&le)) {
550 lcode = *(ngx_http_script_len_code_pt *) le.ip;
551 }
552
553 e.skip = (len == sizeof(CRLF) - 1) ? 1 : 0;
554
555 } else {
556 e.skip = 0;
557 }
558
559 le.ip += sizeof(uintptr_t);
560
561 while (*(uintptr_t *) e.ip) {
562 code = *(ngx_http_script_code_pt *) e.ip;
563 code((ngx_http_script_engine_t *) &e);
564 }
565 e.ip += sizeof(uintptr_t);
566 }
567
568 b->last = e.pos;
569
570
571 if (plcf->upstream.pass_request_headers) {
572 part = &r->headers_in.headers.part;
573 header = part->elts;
574
575 for (i = 0; /* void */; i++) {
576
577 if (i >= part->nelts) {
578 if (part->next == NULL) {
579 break;
580 }
581
582 part = part->next;
583 header = part->elts;
584 i = 0;
585 }
586
587 key = header[i].hash % plcf->headers_set_hash->hash_size;
588
589 if (hh[key].len == header[i].key.len
590 && ngx_strcasecmp(hh[key].data, header[i].key.data) == 0)
591 {
592 continue;
593 }
594
595 b->last = ngx_cpymem(b->last, header[i].key.data,
596 header[i].key.len);
597
598 *b->last++ = ':'; *b->last++ = ' ';
599
600 b->last = ngx_cpymem(b->last, header[i].value.data,
601 header[i].value.len);
602
603 *b->last++ = CR; *b->last++ = LF;
604
605 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
606 "http proxy header: \"%V: %V\"",
607 &header[i].key, &header[i].value);
608 }
609 }
610
611 /* add "\r\n" at the header end */
612 *b->last++ = CR; *b->last++ = LF;
613
614 #if (NGX_DEBUG)
615 {
616 ngx_str_t s;
617
618 s.len = b->last - b->pos;
619 s.data = b->pos;
620 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
621 "http proxy header:\n\"%V\"", &s);
622 }
623 #endif
624
625 if (plcf->upstream.pass_request_body) {
626
627 body = u->request_bufs;
628 u->request_bufs = cl;
629
630 while (body) {
631 b = ngx_alloc_buf(r->pool);
632 if (b == NULL) {
633 return NGX_ERROR;
634 }
635
636 ngx_memcpy(b, body->buf, sizeof(ngx_buf_t));
637
638 cl->next = ngx_alloc_chain_link(r->pool);
639 if (cl->next == NULL) {
640 return NGX_ERROR;
641 }
642
643 cl = cl->next;
644 cl->buf = b;
645
646 body = body->next;
647 }
648
649 } else {
650 u->request_bufs = cl;
651 }
652
653 cl->next = NULL;
654
655 return NGX_OK;
656 }
657
658
659 static ngx_int_t
660 ngx_http_proxy_reinit_request(ngx_http_request_t *r)
661 {
662 ngx_http_proxy_ctx_t *p;
663
664 p = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
665
666 if (p == NULL) {
667 return NGX_OK;
668 }
669
670 p->status = 0;
671 p->status_count = 0;
672 p->status_start = NULL;
673 p->status_end = NULL;
674
675 r->upstream->process_header = ngx_http_proxy_process_status_line;
676
677 return NGX_OK;
678 }
679
680
681 static ngx_int_t
682 ngx_http_proxy_process_status_line(ngx_http_request_t *r)
683 {
684 ngx_int_t rc;
685 ngx_http_upstream_t *u;
686 ngx_http_proxy_ctx_t *p;
687
688 p = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
689
690 if (p == NULL) {
691 p = ngx_pcalloc(r->pool, sizeof(ngx_http_proxy_ctx_t));
692 if (p == NULL) {
693 return NGX_HTTP_INTERNAL_SERVER_ERROR;
694 }
695
696 ngx_http_set_ctx(r, p, ngx_http_proxy_module);
697 }
698
699 rc = ngx_http_proxy_parse_status_line(r, p);
700
701 if (rc == NGX_AGAIN) {
702 return rc;
703 }
704
705 u = r->upstream;
706
707 if (rc == NGX_HTTP_PROXY_PARSE_NO_HEADER) {
708 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
709 "upstream sent no valid HTTP/1.0 header");
710
711 if (u->accel) {
712 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
713 }
714
715 r->http_version = NGX_HTTP_VERSION_9;
716 p->status = NGX_HTTP_OK;
717
718 return NGX_OK;
719 }
720
721 r->headers_out.status = p->status;
722 u->state->status = p->status;
723
724 r->headers_out.status_line.len = p->status_end - p->status_start;
725 r->headers_out.status_line.data = ngx_palloc(r->pool,
726 r->headers_out.status_line.len);
727 if (r->headers_out.status_line.data == NULL) {
728 return NGX_HTTP_INTERNAL_SERVER_ERROR;
729 }
730 ngx_memcpy(r->headers_out.status_line.data, p->status_start,
731 r->headers_out.status_line.len);
732
733 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
734 "http proxy status %ui \"%V\"",
735 r->headers_out.status, &r->headers_out.status_line);
736
737 u->process_header = ngx_http_proxy_process_header;
738
739 return ngx_http_proxy_process_header(r);
740 }
741
742
743 static ngx_int_t
744 ngx_http_proxy_parse_status_line(ngx_http_request_t *r, ngx_http_proxy_ctx_t *p)
745 {
746 u_char ch;
747 u_char *pos;
748 ngx_http_upstream_t *u;
749 enum {
750 sw_start = 0,
751 sw_H,
752 sw_HT,
753 sw_HTT,
754 sw_HTTP,
755 sw_first_major_digit,
756 sw_major_digit,
757 sw_first_minor_digit,
758 sw_minor_digit,
759 sw_status,
760 sw_space_after_status,
761 sw_status_text,
762 sw_almost_done
763 } state;
764
765 u = r->upstream;
766
767 state = r->state;
768
769 for (pos = u->header_in.pos; pos < u->header_in.last; pos++) {
770 ch = *pos;
771
772 switch (state) {
773
774 /* "HTTP/" */
775 case sw_start:
776 switch (ch) {
777 case 'H':
778 state = sw_H;
779 break;
780 default:
781 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
782 }
783 break;
784
785 case sw_H:
786 switch (ch) {
787 case 'T':
788 state = sw_HT;
789 break;
790 default:
791 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
792 }
793 break;
794
795 case sw_HT:
796 switch (ch) {
797 case 'T':
798 state = sw_HTT;
799 break;
800 default:
801 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
802 }
803 break;
804
805 case sw_HTT:
806 switch (ch) {
807 case 'P':
808 state = sw_HTTP;
809 break;
810 default:
811 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
812 }
813 break;
814
815 case sw_HTTP:
816 switch (ch) {
817 case '/':
818 state = sw_first_major_digit;
819 break;
820 default:
821 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
822 }
823 break;
824
825 /* the first digit of major HTTP version */
826 case sw_first_major_digit:
827 if (ch < '1' || ch > '9') {
828 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
829 }
830
831 state = sw_major_digit;
832 break;
833
834 /* the major HTTP version or dot */
835 case sw_major_digit:
836 if (ch == '.') {
837 state = sw_first_minor_digit;
838 break;
839 }
840
841 if (ch < '0' || ch > '9') {
842 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
843 }
844
845 break;
846
847 /* the first digit of minor HTTP version */
848 case sw_first_minor_digit:
849 if (ch < '0' || ch > '9') {
850 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
851 }
852
853 state = sw_minor_digit;
854 break;
855
856 /* the minor HTTP version or the end of the request line */
857 case sw_minor_digit:
858 if (ch == ' ') {
859 state = sw_status;
860 break;
861 }
862
863 if (ch < '0' || ch > '9') {
864 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
865 }
866
867 break;
868
869 /* HTTP status code */
870 case sw_status:
871 if (ch < '0' || ch > '9') {
872 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
873 }
874
875 p->status = p->status * 10 + ch - '0';
876
877 if (++p->status_count == 3) {
878 state = sw_space_after_status;
879 p->status_start = pos - 2;
880 }
881
882 break;
883
884 /* space or end of line */
885 case sw_space_after_status:
886 switch (ch) {
887 case ' ':
888 state = sw_status_text;
889 break;
890 case '.': /* IIS may send 403.1, 403.2, etc */
891 state = sw_status_text;
892 break;
893 case CR:
894 state = sw_almost_done;
895 break;
896 case LF:
897 goto done;
898 default:
899 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
900 }
901 break;
902
903 /* any text until end of line */
904 case sw_status_text:
905 switch (ch) {
906 case CR:
907 state = sw_almost_done;
908
909 break;
910 case LF:
911 goto done;
912 }
913 break;
914
915 /* end of request line */
916 case sw_almost_done:
917 p->status_end = pos - 1;
918 switch (ch) {
919 case LF:
920 goto done;
921 default:
922 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
923 }
924 }
925 }
926
927 u->header_in.pos = pos + 1;
928 r->state = state;
929
930 return NGX_AGAIN;
931
932 done:
933
934 u->header_in.pos = pos + 1;
935
936 if (p->status_end == NULL) {
937 p->status_end = pos;
938 }
939
940 r->state = sw_start;
941
942 return NGX_OK;
943 }
944
945
946 static ngx_int_t
947 ngx_http_proxy_process_header(ngx_http_request_t *r)
948 {
949 ngx_int_t rc;
950 ngx_uint_t key;
951 ngx_table_elt_t *h;
952 ngx_http_upstream_header_t *hh;
953 ngx_http_upstream_main_conf_t *umcf;
954
955 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
956 hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets;
957
958 for ( ;; ) {
959
960 rc = ngx_http_parse_header_line(r, &r->upstream->header_in);
961
962 if (rc == NGX_OK) {
963
964 /* a header line has been parsed successfully */
965
966 h = ngx_list_push(&r->upstream->headers_in.headers);
967 if (h == NULL) {
968 return NGX_HTTP_INTERNAL_SERVER_ERROR;
969 }
970
971 h->hash = r->header_hash;
972
973 h->key.len = r->header_name_end - r->header_name_start;
974 h->value.len = r->header_end - r->header_start;
975
976 h->key.data = ngx_palloc(r->pool,
977 h->key.len + 1 + h->value.len + 1);
978 if (h->key.data == NULL) {
979 return NGX_HTTP_INTERNAL_SERVER_ERROR;
980 }
981
982 h->value.data = h->key.data + h->key.len + 1;
983
984 ngx_cpystrn(h->key.data, r->header_name_start, h->key.len + 1);
985 ngx_cpystrn(h->value.data, r->header_start, h->value.len + 1);
986
987 key = h->hash % umcf->headers_in_hash.hash_size;
988
989 if (hh[key].name.len == h->key.len
990 && ngx_strcasecmp(hh[key].name.data, h->key.data) == 0)
991 {
992 if (hh[key].handler(r, h, hh[key].offset) != NGX_OK) {
993 return NGX_HTTP_INTERNAL_SERVER_ERROR;
994 }
995 }
996
997 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
998 "http proxy header: \"%V: %V\"",
999 &h->key, &h->value);
1000
1001 continue;
1002 }
1003
1004 if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
1005
1006 /* a whole header has been parsed successfully */
1007
1008 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1009 "http proxy header done");
1010
1011 return NGX_OK;
1012 }
1013
1014 /* there was error while a header line parsing */
1015
1016 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1017 ngx_http_upstream_header_errors[rc
1018 - NGX_HTTP_PARSE_HEADER_ERROR]);
1019
1020 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
1021 }
1022 }
1023
1024
1025 static void
1026 ngx_http_proxy_abort_request(ngx_http_request_t *r)
1027 {
1028 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1029 "abort http proxy request");
1030
1031 return;
1032 }
1033
1034
1035 static void
1036 ngx_http_proxy_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
1037 {
1038 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1039 "finalize http proxy request");
1040
1041 return;
1042 }
1043
1044
1045 static ngx_http_variable_value_t *
1046 ngx_http_proxy_host_variable(ngx_http_request_t *r, uintptr_t data)
1047 {
1048 ngx_http_variable_value_t *vv;
1049 ngx_http_proxy_loc_conf_t *plcf;
1050
1051 vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
1052 if (vv == NULL) {
1053 return NULL;
1054 }
1055
1056 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
1057
1058 vv->value = 0;
1059 vv->text = plcf->host_header;
1060
1061 return vv;
1062 }
1063
1064
1065 static ngx_http_variable_value_t *
1066 ngx_http_proxy_port_variable(ngx_http_request_t *r, uintptr_t data)
1067 {
1068 ngx_http_variable_value_t *vv;
1069 ngx_http_proxy_loc_conf_t *plcf;
1070
1071 vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
1072 if (vv == NULL) {
1073 return NULL;
1074 }
1075
1076 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
1077
1078 vv->value = 0;
1079 vv->text = plcf->port_text;
1080
1081 return vv;
1082 }
1083
1084
1085 static ngx_http_variable_value_t *
1086 ngx_http_proxy_add_x_forwarded_for_variable(ngx_http_request_t *r,
1087 uintptr_t data)
1088 {
1089 u_char *p;
1090 ngx_http_variable_value_t *vv;
1091
1092 vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
1093 if (vv == NULL) {
1094 return NULL;
1095 }
1096
1097 vv->value = 0;
1098
1099 if (r->headers_in.x_forwarded_for == NULL) {
1100 vv->text = r->connection->addr_text;
1101 return vv;
1102 }
1103
1104 vv->text.len = r->headers_in.x_forwarded_for->value.len
1105 + sizeof(", ") - 1 + r->connection->addr_text.len;
1106
1107 p = ngx_palloc(r->pool, vv->text.len);
1108 if (p == NULL) {
1109 return NULL;
1110 }
1111
1112 vv->text.data = p;
1113
1114 p = ngx_cpymem(p, r->headers_in.x_forwarded_for->value.data,
1115 r->headers_in.x_forwarded_for->value.len);
1116
1117 *p++ = ','; *p++ = ' ';
1118
1119 ngx_memcpy(p, r->connection->addr_text.data, r->connection->addr_text.len);
1120
1121 return vv;
1122 }
1123
1124
1125 static ngx_int_t
1126 ngx_http_proxy_rewrite_redirect(ngx_http_request_t *r, ngx_table_elt_t *h,
1127 size_t prefix)
1128 {
1129 ngx_int_t rc;
1130 ngx_uint_t i;
1131 ngx_http_proxy_loc_conf_t *plcf;
1132 ngx_http_proxy_redirect_t *pr;
1133
1134 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
1135
1136 pr = plcf->redirects->elts;
1137
1138 if (pr == NULL) {
1139 return NGX_DECLINED;
1140 }
1141
1142 for (i = 0; i < plcf->redirects->nelts; i++) {
1143 rc = pr->handler(r, h, prefix, pr);
1144
1145 if (rc != NGX_DECLINED) {
1146 return rc;
1147 }
1148 }
1149
1150 return NGX_DECLINED;
1151 }
1152
1153
1154 static ngx_int_t
1155 ngx_http_proxy_rewrite_redirect_text(ngx_http_request_t *r, ngx_table_elt_t *h,
1156 size_t prefix, ngx_http_proxy_redirect_t *pr)
1157 {
1158 size_t len;
1159 u_char *data, *p;
1160
1161 if (pr->redirect.len > h->value.len - prefix
1162 || ngx_rstrncmp(h->value.data + prefix, pr->redirect.data,
1163 pr->redirect.len) != 0)
1164 {
1165 return NGX_DECLINED;
1166 }
1167
1168 len = prefix + pr->replacement.text.len + h->value.len - pr->redirect.len;
1169
1170 data = ngx_palloc(r->pool, len);
1171 if (data == NULL) {
1172 return NGX_ERROR;
1173 }
1174
1175 p = data;
1176
1177 if (prefix) {
1178 p = ngx_cpymem(p, h->value.data, prefix);
1179 }
1180
1181 p = ngx_cpymem(p, pr->replacement.text.data, pr->replacement.text.len);
1182
1183 ngx_memcpy(p, h->value.data + prefix + pr->redirect.len,
1184 h->value.len - pr->redirect.len - prefix);
1185
1186 h->value.len = len;
1187 h->value.data = data;
1188
1189 return NGX_OK;
1190 }
1191
1192
1193 static ngx_int_t
1194 ngx_http_proxy_rewrite_redirect_vars(ngx_http_request_t *r, ngx_table_elt_t *h,
1195 size_t prefix, ngx_http_proxy_redirect_t *pr)
1196 {
1197 size_t len;
1198 u_char *data, *p;
1199 ngx_http_script_code_pt code;
1200 ngx_http_script_engine_t e;
1201 ngx_http_script_len_code_pt lcode;
1202
1203 if (pr->redirect.len > h->value.len - prefix
1204 || ngx_rstrncmp(h->value.data + prefix, pr->redirect.data,
1205 pr->redirect.len) != 0)
1206 {
1207 return NGX_DECLINED;
1208 }
1209
1210 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
1211
1212 e.ip = pr->replacement.vars.lengths;
1213 e.request = r;
1214
1215 for (len = prefix; *(uintptr_t *) e.ip; len += lcode(&e)) {
1216 lcode = *(ngx_http_script_len_code_pt *) e.ip;
1217 }
1218
1219 data = ngx_palloc(r->pool, len);
1220 if (data == NULL) {
1221 return NGX_ERROR;
1222 }
1223
1224 p = data;
1225
1226 if (prefix) {
1227 p = ngx_cpymem(p, h->value.data, prefix);
1228 }
1229
1230 e.ip = pr->replacement.vars.values;
1231 e.pos = p;
1232
1233 while (*(uintptr_t *) e.ip) {
1234 code = *(ngx_http_script_code_pt *) e.ip;
1235 code(&e);
1236 }
1237
1238 h->value.len = len;
1239 h->value.data = data;
1240
1241 return NGX_OK;
1242 }
1243
1244
1245 static ngx_int_t
1246 ngx_http_proxy_add_variables(ngx_conf_t *cf)
1247 {
1248 ngx_http_variable_t *var, *v;
1249
1250 for (v = ngx_http_proxy_vars; v->name.len; v++) {
1251 var = ngx_http_add_variable(cf, &v->name, v->flags);
1252 if (var == NULL) {
1253 return NGX_ERROR;
1254 }
1255
1256 var->handler = v->handler;
1257 var->data = v->data;
1258 }
1259
1260 return NGX_OK;
1261 }
1262
1263
1264 static void *
1265 ngx_http_proxy_create_loc_conf(ngx_conf_t *cf)
1266 {
1267 ngx_http_proxy_loc_conf_t *conf;
1268
1269 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_proxy_loc_conf_t));
1270 if (conf == NULL) {
1271 return NGX_CONF_ERROR;
1272 }
1273
1274 /*
1275 * set by ngx_pcalloc():
1276 *
1277 * conf->upstream.bufs.num = 0;
1278 * conf->upstream.path = NULL;
1279 * conf->upstream.next_upstream = 0;
1280 * conf->upstream.temp_path = NULL;
1281 * conf->upstream.schema = { 0, NULL };
1282 * conf->upstream.uri = { 0, NULL };
1283 * conf->upstream.location = NULL;
1284 *
1285 * conf->headers_source = NULL;
1286 * conf->headers_set_len = NULL;
1287 * conf->headers_set = NULL;
1288 * conf->headers_set_hash = NULL;
1289 * conf->rewrite_locations = NULL;
1290 */
1291
1292 conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
1293 conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
1294 conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
1295
1296 conf->upstream.send_lowat = NGX_CONF_UNSET_SIZE;
1297 conf->upstream.header_buffer_size = NGX_CONF_UNSET_SIZE;
1298 conf->upstream.busy_buffers_size = NGX_CONF_UNSET_SIZE;
1299 conf->upstream.max_temp_file_size = NGX_CONF_UNSET_SIZE;
1300 conf->upstream.temp_file_write_size = NGX_CONF_UNSET_SIZE;
1301
1302 conf->upstream.pass_unparsed_uri = NGX_CONF_UNSET;
1303 conf->upstream.method = NGX_CONF_UNSET_UINT;
1304 conf->upstream.pass_request_headers = NGX_CONF_UNSET;
1305 conf->upstream.pass_request_body = NGX_CONF_UNSET;
1306
1307 conf->upstream.redirect_errors = NGX_CONF_UNSET;
1308
1309 /* "proxy_cyclic_temp_file" is disabled */
1310 conf->upstream.cyclic_temp_file = 0;
1311
1312 conf->upstream.pass_x_powered_by = NGX_CONF_UNSET;
1313 conf->upstream.pass_server = NGX_CONF_UNSET;
1314 conf->upstream.pass_date = 0;
1315 conf->upstream.pass_x_accel_expires = NGX_CONF_UNSET;
1316
1317 conf->redirect = NGX_CONF_UNSET;
1318
1319 return conf;
1320 }
1321
1322
1323 static char *
1324 ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
1325 {
1326 ngx_http_proxy_loc_conf_t *prev = parent;
1327 ngx_http_proxy_loc_conf_t *conf = child;
1328
1329 u_char *p;
1330 size_t size;
1331 uintptr_t *code;
1332 ngx_str_t *name;
1333 ngx_uint_t i;
1334 ngx_table_elt_t *src, *s, *h;
1335 ngx_http_proxy_redirect_t *pr;
1336 ngx_http_script_compile_t sc;
1337 ngx_http_script_copy_code_t *copy;
1338
1339 ngx_conf_merge_msec_value(conf->upstream.connect_timeout,
1340 prev->upstream.connect_timeout, 60000);
1341
1342 ngx_conf_merge_msec_value(conf->upstream.send_timeout,
1343 prev->upstream.send_timeout, 60000);
1344
1345 ngx_conf_merge_msec_value(conf->upstream.read_timeout,
1346 prev->upstream.read_timeout, 60000);
1347
1348 ngx_conf_merge_size_value(conf->upstream.send_lowat,
1349 prev->upstream.send_lowat, 0);
1350
1351 ngx_conf_merge_size_value(conf->upstream.header_buffer_size,
1352 prev->upstream.header_buffer_size,
1353 (size_t) ngx_pagesize);
1354
1355 ngx_conf_merge_bufs_value(conf->upstream.bufs, prev->upstream.bufs,
1356 8, ngx_pagesize);
1357
1358 if (conf->upstream.bufs.num < 2) {
1359 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1360 "there must be at least 2 \"proxy_buffers\"");
1361 return NGX_CONF_ERROR;
1362 }
1363
1364
1365 size = conf->upstream.header_buffer_size;
1366 if (size < conf->upstream.bufs.size) {
1367 size = conf->upstream.bufs.size;
1368 }
1369
1370
1371 ngx_conf_merge_size_value(conf->upstream.busy_buffers_size,
1372 prev->upstream.busy_buffers_size,
1373 NGX_CONF_UNSET_SIZE);
1374
1375 if (conf->upstream.busy_buffers_size == NGX_CONF_UNSET_SIZE) {
1376 conf->upstream.busy_buffers_size = 2 * size;
1377
1378 } else if (conf->upstream.busy_buffers_size < size) {
1379 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1380 "\"proxy_busy_buffers_size\" must be equal or bigger than "
1381 "maximum of the value of \"proxy_header_buffer_size\" and "
1382 "one of the \"proxy_buffers\"");
1383
1384 return NGX_CONF_ERROR;
1385
1386 } else if (conf->upstream.busy_buffers_size
1387 > (conf->upstream.bufs.num - 1) * conf->upstream.bufs.size)
1388 {
1389 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1390 "\"proxy_busy_buffers_size\" must be less than "
1391 "the size of all \"proxy_buffers\" minus one buffer");
1392
1393 return NGX_CONF_ERROR;
1394 }
1395
1396
1397 ngx_conf_merge_size_value(conf->upstream.temp_file_write_size,
1398 prev->upstream.temp_file_write_size,
1399 NGX_CONF_UNSET_SIZE);
1400
1401 if (conf->upstream.temp_file_write_size == NGX_CONF_UNSET_SIZE) {
1402 conf->upstream.temp_file_write_size = 2 * size;
1403
1404 } else if (conf->upstream.temp_file_write_size < size) {
1405 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1406 "\"proxy_temp_file_write_size\" must be equal or bigger than "
1407 "maximum of the value of \"proxy_header_buffer_size\" and "
1408 "one of the \"proxy_buffers\"");
1409
1410 return NGX_CONF_ERROR;
1411 }
1412
1413
1414 ngx_conf_merge_size_value(conf->upstream.max_temp_file_size,
1415 prev->upstream.max_temp_file_size,
1416 NGX_CONF_UNSET_SIZE);
1417
1418 if (conf->upstream.max_temp_file_size == NGX_CONF_UNSET_SIZE) {
1419
1420 conf->upstream.max_temp_file_size = 1024 * 1024 * 1024;
1421
1422 } else if (conf->upstream.max_temp_file_size != 0
1423 && conf->upstream.max_temp_file_size < size)
1424 {
1425 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1426 "\"fastcgi_max_temp_file_size\" must be equal to zero to disable "
1427 "the temporary files usage or must be equal or bigger than "
1428 "maximum of the value of \"fastcgi_header_buffer_size\" and "
1429 "one of the \"fastcgi_buffers\"");
1430
1431 return NGX_CONF_ERROR;
1432 }
1433
1434 ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
1435 prev->upstream.next_upstream,
1436 (NGX_CONF_BITMASK_SET
1437 |NGX_HTTP_UPSTREAM_FT_ERROR
1438 |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
1439
1440 ngx_conf_merge_path_value(conf->upstream.temp_path,
1441 prev->upstream.temp_path,
1442 NGX_HTTP_PROXY_TEMP_PATH, 1, 2, 0,
1443 ngx_garbage_collector_temp_handler, cf);
1444
1445 ngx_conf_merge_msec_value(conf->upstream.pass_unparsed_uri,
1446 prev->upstream.pass_unparsed_uri, 0);
1447
1448 if (conf->upstream.pass_unparsed_uri && conf->upstream.location->len > 1) {
1449 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
1450 "\"proxy_pass_unparsed_uri\" can be set for "
1451 "location \"/\" or given by regular expression.");
1452 return NGX_CONF_ERROR;
1453 }
1454
1455 if (conf->upstream.method == NGX_CONF_UNSET_UINT) {
1456 conf->upstream.method = prev->upstream.method;
1457 }
1458
1459 ngx_conf_merge_value(conf->upstream.pass_request_headers,
1460 prev->upstream.pass_request_headers, 1);
1461 ngx_conf_merge_value(conf->upstream.pass_request_body,
1462 prev->upstream.pass_request_body, 1);
1463
1464 ngx_conf_merge_msec_value(conf->upstream.redirect_errors,
1465 prev->upstream.redirect_errors, 0);
1466
1467 ngx_conf_merge_msec_value(conf->upstream.pass_x_powered_by,
1468 prev->upstream.pass_x_powered_by, 1);
1469 ngx_conf_merge_msec_value(conf->upstream.pass_server,
1470 prev->upstream.pass_server, 0);
1471 ngx_conf_merge_msec_value(conf->upstream.pass_x_accel_expires,
1472 prev->upstream.pass_x_accel_expires, 0);
1473
1474
1475 ngx_conf_merge_value(conf->redirect, prev->redirect, 1);
1476
1477 if (conf->redirect) {
1478
1479 if (conf->redirects == NULL) {
1480 conf->redirects = prev->redirects;
1481 }
1482
1483 if (conf->redirects == NULL && conf->upstream.url.data) {
1484
1485 conf->redirects = ngx_array_create(cf->pool, 1,
1486 sizeof(ngx_http_proxy_redirect_t));
1487 if (conf->redirects == NULL) {
1488 return NGX_CONF_ERROR;
1489 }
1490
1491 pr = ngx_array_push(conf->redirects);
1492 if (pr == NULL) {
1493 return NGX_CONF_ERROR;
1494 }
1495
1496 pr->handler = ngx_http_proxy_rewrite_redirect_text;
1497 pr->redirect = conf->upstream.url;
1498 pr->replacement.text = *conf->upstream.location;
1499 }
1500 }
1501
1502
1503 if (conf->peers == NULL) {
1504 conf->peers = prev->peers;
1505 conf->upstream = prev->upstream;
1506 }
1507
1508 if (conf->headers_source == NULL) {
1509 conf->headers_source = prev->headers_source;
1510 conf->headers_set_len = prev->headers_set_len;
1511 conf->headers_set = prev->headers_set;
1512 conf->headers_set_hash = prev->headers_set_hash;
1513 }
1514
1515 if (conf->headers_set_hash) {
1516 return NGX_CONF_OK;
1517 }
1518
1519
1520 conf->headers_names = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t));
1521 if (conf->headers_names == NULL) {
1522 return NGX_CONF_ERROR;
1523 }
1524
1525 if (conf->headers_source == NULL) {
1526 conf->headers_source = ngx_array_create(cf->pool, 4,
1527 sizeof(ngx_table_elt_t));
1528 if (conf->headers_source == NULL) {
1529 return NGX_CONF_ERROR;
1530 }
1531 }
1532
1533 conf->headers_set_len = ngx_array_create(cf->pool, 64, 1);
1534 if (conf->headers_set_len == NULL) {
1535 return NGX_CONF_ERROR;
1536 }
1537
1538 conf->headers_set = ngx_array_create(cf->pool, 512, 1);
1539 if (conf->headers_set == NULL) {
1540 return NGX_CONF_ERROR;
1541 }
1542
1543
1544 src = conf->headers_source->elts;
1545
1546 for (h = ngx_http_proxy_headers; h->key.len; h++) {
1547
1548 for (i = 0; i < conf->headers_source->nelts; i++) {
1549 if (ngx_strcasecmp(h->key.data, src[i].key.data) == 0) {
1550 goto next;
1551 }
1552 }
1553
1554 s = ngx_array_push(conf->headers_source);
1555 if (s == NULL) {
1556 return NGX_CONF_ERROR;
1557 }
1558
1559 *s = *h;
1560
1561 next:
1562
1563 continue;
1564 }
1565
1566 for (i = 0; i < conf->headers_source->nelts; i++) {
1567
1568 name = ngx_array_push(conf->headers_names);
1569 if (name == NULL) {
1570 return NGX_CONF_ERROR;
1571 }
1572
1573 *name = src[i].key;
1574
1575 if (ngx_http_script_variables_count(&src[i].value) == 0) {
1576 copy = ngx_array_push_n(conf->headers_set_len,
1577 sizeof(ngx_http_script_copy_code_t));
1578 if (copy == NULL) {
1579 return NGX_CONF_ERROR;
1580 }
1581
1582 copy->code = (ngx_http_script_code_pt)
1583 ngx_http_script_copy_len_code;
1584 copy->len = src[i].key.len + sizeof(": ") - 1
1585 + src[i].value.len + sizeof(CRLF) - 1;
1586
1587
1588 size = (sizeof(ngx_http_script_copy_code_t)
1589 + src[i].key.len + sizeof(": ") - 1
1590 + src[i].value.len + sizeof(CRLF) - 1
1591 + sizeof(uintptr_t) - 1)
1592 & ~(sizeof(uintptr_t) - 1);
1593
1594 copy = ngx_array_push_n(conf->headers_set, size);
1595 if (copy == NULL) {
1596 return NGX_CONF_ERROR;
1597 }
1598
1599 copy->code = ngx_http_script_copy_code;
1600 copy->len = src[i].key.len + sizeof(": ") - 1
1601 + src[i].value.len + sizeof(CRLF) - 1;
1602
1603 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
1604
1605 p = ngx_cpymem(p, src[i].key.data, src[i].key.len);
1606 *p++ = ':'; *p++ = ' ';
1607 p = ngx_cpymem(p, src[i].value.data, src[i].value.len);
1608 *p++ = CR; *p = LF;
1609
1610 } else {
1611 copy = ngx_array_push_n(conf->headers_set_len,
1612 sizeof(ngx_http_script_copy_code_t));
1613 if (copy == NULL) {
1614 return NGX_CONF_ERROR;
1615 }
1616
1617 copy->code = (ngx_http_script_code_pt)
1618 ngx_http_script_copy_len_code;
1619 copy->len = src[i].key.len + sizeof(": ") - 1;
1620
1621
1622 size = (sizeof(ngx_http_script_copy_code_t)
1623 + src[i].key.len + sizeof(": ") - 1 + sizeof(uintptr_t) - 1)
1624 & ~(sizeof(uintptr_t) - 1);
1625
1626 copy = ngx_array_push_n(conf->headers_set, size);
1627 if (copy == NULL) {
1628 return NGX_CONF_ERROR;
1629 }
1630
1631 copy->code = ngx_http_script_copy_code;
1632 copy->len = src[i].key.len + sizeof(": ") - 1;
1633
1634 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
1635 p = ngx_cpymem(p, src[i].key.data, src[i].key.len);
1636 *p++ = ':'; *p = ' ';
1637
1638
1639 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
1640
1641 sc.cf = cf;
1642 sc.source = &src[i].value;
1643 sc.lengths = &conf->headers_set_len;
1644 sc.values = &conf->headers_set;
1645
1646 if (ngx_http_script_compile(&sc) != NGX_OK) {
1647 return NGX_CONF_ERROR;
1648 }
1649
1650
1651 copy = ngx_array_push_n(conf->headers_set_len,
1652 sizeof(ngx_http_script_copy_code_t));
1653 if (copy == NULL) {
1654 return NGX_CONF_ERROR;
1655 }
1656
1657 copy->code = (ngx_http_script_code_pt)
1658 ngx_http_script_copy_len_code;
1659 copy->len = sizeof(CRLF) - 1;
1660
1661
1662 size = (sizeof(ngx_http_script_copy_code_t)
1663 + sizeof(CRLF) - 1 + sizeof(uintptr_t) - 1)
1664 & ~(sizeof(uintptr_t) - 1);
1665
1666 copy = ngx_array_push_n(conf->headers_set, size);
1667 if (copy == NULL) {
1668 return NGX_CONF_ERROR;
1669 }
1670
1671 copy->code = ngx_http_script_copy_code;
1672 copy->len = sizeof(CRLF) - 1;
1673
1674 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
1675 *p++ = CR; *p = LF;
1676 }
1677
1678 code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t));
1679 if (code == NULL) {
1680 return NGX_CONF_ERROR;
1681 }
1682
1683 *code = (uintptr_t) NULL;
1684
1685 code = ngx_array_push_n(conf->headers_set, sizeof(uintptr_t));
1686 if (code == NULL) {
1687 return NGX_CONF_ERROR;
1688 }
1689
1690 *code = (uintptr_t) NULL;
1691 }
1692
1693 code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t));
1694 if (code == NULL) {
1695 return NGX_CONF_ERROR;
1696 }
1697
1698 *code = (uintptr_t) NULL;
1699
1700
1701 conf->headers_set_hash = ngx_pcalloc(cf->pool, sizeof(ngx_hash_t));
1702 if (conf->headers_set_hash == NULL) {
1703 return NGX_CONF_ERROR;
1704 }
1705
1706 conf->headers_set_hash->max_size = 100;
1707 conf->headers_set_hash->bucket_limit = 1;
1708 conf->headers_set_hash->bucket_size = sizeof(ngx_str_t);
1709 conf->headers_set_hash->name = "proxy_headers";
1710
1711 if (ngx_hash_init(conf->headers_set_hash, cf->pool,
1712 conf->headers_names->elts, conf->headers_names->nelts) != NGX_OK)
1713 {
1714 return NGX_CONF_ERROR;
1715 }
1716
1717 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, cf->log, 0,
1718 "proxy_headers hash size: %ui, "
1719 "max buckets per entry: %ui",
1720 conf->headers_set_hash->hash_size,
1721 conf->headers_set_hash->min_buckets);
1722
1723 return NGX_CONF_OK;
1724 }
1725
1726
1727 static char *
1728 ngx_http_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1729 {
1730 ngx_http_proxy_loc_conf_t *plcf = conf;
1731
1732 ngx_uint_t i;
1733 ngx_str_t *value, *url;
1734 ngx_inet_upstream_t inet_upstream;
1735 ngx_http_core_loc_conf_t *clcf;
1736 #if (NGX_HAVE_UNIX_DOMAIN)
1737 ngx_unix_domain_upstream_t unix_upstream;
1738 #endif
1739
1740 value = cf->args->elts;
1741
1742 url = &value[1];
1743
1744 if (ngx_strncasecmp(url->data, "http://", 7) != 0) {
1745 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid URL prefix");
1746 return NGX_CONF_ERROR;
1747 }
1748
1749 if (ngx_strncasecmp(url->data + 7, "unix:", 5) == 0) {
1750
1751 #if (NGX_HAVE_UNIX_DOMAIN)
1752
1753 ngx_memzero(&unix_upstream, sizeof(ngx_unix_domain_upstream_t));
1754
1755 unix_upstream.name = *url;
1756 unix_upstream.url.len = url->len - 7;
1757 unix_upstream.url.data = url->data + 7;
1758 unix_upstream.uri_part = 1;
1759
1760 plcf->peers = ngx_unix_upstream_parse(cf, &unix_upstream);
1761 if (plcf->peers == NULL) {
1762 return NGX_CONF_ERROR;
1763 }
1764
1765 plcf->peers->peer[0].uri_separator = ":";
1766
1767 plcf->host_header.len = sizeof("localhost") - 1;
1768 plcf->host_header.data = (u_char *) "localhost";
1769 plcf->upstream.uri = unix_upstream.uri;
1770
1771 #else
1772 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1773 "the unix domain sockets are not supported "
1774 "on this platform");
1775 return NGX_CONF_ERROR;
1776
1777 #endif
1778
1779 } else {
1780 ngx_memzero(&inet_upstream, sizeof(ngx_inet_upstream_t));
1781
1782 inet_upstream.name = *url;
1783 inet_upstream.url.len = url->len - 7;
1784 inet_upstream.url.data = url->data + 7;
1785 inet_upstream.default_port_value = 80;
1786 inet_upstream.uri_part = 1;
1787
1788 plcf->peers = ngx_inet_upstream_parse(cf, &inet_upstream);
1789 if (plcf->peers == NULL) {
1790 return NGX_CONF_ERROR;
1791 }
1792
1793 for (i = 0; i < plcf->peers->number; i++) {
1794 plcf->peers->peer[i].uri_separator = ":";
1795 }
1796
1797 plcf->host_header = inet_upstream.host_header;
1798 plcf->port_text = inet_upstream.port_text;
1799 plcf->upstream.uri = inet_upstream.uri;
1800 }
1801
1802 plcf->upstream.schema.len = sizeof("http://") - 1;
1803 plcf->upstream.schema.data = (u_char *) "http://";
1804
1805 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
1806
1807 clcf->handler = ngx_http_proxy_handler;
1808
1809 #if (NGX_PCRE)
1810 plcf->upstream.location = clcf->regex ? &ngx_http_proxy_uri : &clcf->name;
1811 #else
1812 plcf->upstream.location = &clcf->name;
1813 #endif
1814
1815 plcf->upstream.url = *url;
1816
1817 if (clcf->name.data[clcf->name.len - 1] == '/') {
1818 clcf->auto_redirect = 1;
1819 }
1820
1821 return NGX_CONF_OK;
1822 }
1823
1824
1825 static char *
1826 ngx_http_proxy_redirect(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1827 {
1828 ngx_http_proxy_loc_conf_t *plcf = conf;
1829
1830 ngx_str_t *value;
1831 ngx_array_t *vars_lengths, *vars_values;
1832 ngx_http_script_compile_t sc;
1833 ngx_http_proxy_redirect_t *pr;
1834
1835 if (plcf->redirect == 0) {
1836 return NGX_CONF_OK;
1837 }
1838
1839 value = cf->args->elts;
1840
1841 if (ngx_strcmp(value[1].data, "off") == 0) {
1842 plcf->redirect = 0;
1843 plcf->redirects = NULL;
1844 return NGX_CONF_OK;
1845 }
1846
1847 if (plcf->redirects == NULL) {
1848 plcf->redirects = ngx_array_create(cf->pool, 1,
1849 sizeof(ngx_http_proxy_redirect_t));
1850 if (plcf->redirects == NULL) {
1851 return NGX_CONF_ERROR;
1852 }
1853 }
1854
1855 pr = ngx_array_push(plcf->redirects);
1856 if (pr == NULL) {
1857 return NGX_CONF_ERROR;
1858 }
1859
1860 if (cf->args->nelts == 2 && ngx_strcmp(value[1].data, "default") == 0) {
1861 if (plcf->upstream.url.data == NULL) {
1862 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1863 "\"proxy_rewrite_location default\" must go "
1864 "after the \"proxy_pass\" directive");
1865 return NGX_CONF_ERROR;
1866 }
1867
1868 pr->handler = ngx_http_proxy_rewrite_redirect_text;
1869 pr->redirect = plcf->upstream.url;
1870 pr->replacement.text = *plcf->upstream.location;
1871
1872 return NGX_CONF_OK;
1873 }
1874
1875 if (ngx_http_script_variables_count(&value[2]) == 0) {
1876 pr->handler = ngx_http_proxy_rewrite_redirect_text;
1877 pr->redirect = value[1];
1878 pr->replacement.text = value[2];
1879
1880 return NGX_CONF_OK;
1881 }
1882
1883 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
1884
1885 vars_lengths = NULL;
1886 vars_values = NULL;
1887
1888 sc.cf = cf;
1889 sc.source = &value[2];
1890 sc.lengths = &vars_lengths;
1891 sc.values = &vars_values;
1892 sc.complete_lengths = 1;
1893 sc.complete_values = 1;
1894
1895 if (ngx_http_script_compile(&sc) != NGX_OK) {
1896 return NGX_CONF_ERROR;
1897 }
1898
1899 pr->handler = ngx_http_proxy_rewrite_redirect_vars;
1900 pr->redirect = value[1];
1901 pr->replacement.vars.lengths = vars_lengths->elts;
1902 pr->replacement.vars.values = vars_values->elts;
1903
1904 return NGX_CONF_OK;
1905 }
1906
1907
1908 static char *
1909 ngx_http_proxy_lowat_check(ngx_conf_t *cf, void *post, void *data)
1910 {
1911 #if (NGX_FREEBSD)
1912 ssize_t *np = data;
1913
1914 if (*np >= ngx_freebsd_net_inet_tcp_sendspace) {
1915 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1916 "\"proxy_send_lowat\" must be less than %d "
1917 "(sysctl net.inet.tcp.sendspace)",
1918 ngx_freebsd_net_inet_tcp_sendspace);
1919
1920 return NGX_CONF_ERROR;
1921 }
1922
1923 #elif !(NGX_HAVE_SO_SNDLOWAT)
1924 ssize_t *np = data;
1925
1926 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1927 "\"proxy_send_lowat\" is not supported, ignored");
1928
1929 *np = 0;
1930
1931 #endif
1932
1933 return NGX_CONF_OK;
1934 }