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nginx 0.8.35
[nginx-catap.git] / src / http / modules / ngx_http_proxy_module.c
blob7b2e077ecc85a54c751a5b7055bf876978c3471f
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_http.h>
10
11
12 typedef struct ngx_http_proxy_redirect_s ngx_http_proxy_redirect_t;
13
14 typedef ngx_int_t (*ngx_http_proxy_redirect_pt)(ngx_http_request_t *r,
15 ngx_table_elt_t *h, size_t prefix, ngx_http_proxy_redirect_t *pr);
16
17 struct ngx_http_proxy_redirect_s {
18 ngx_http_proxy_redirect_pt handler;
19 ngx_str_t redirect;
20
21 union {
22 ngx_str_t text;
23
24 struct {
25 void *lengths;
26 void *values;
27 } vars;
28
29 void *regex;
30 } replacement;
31 };
32
33
34 typedef struct {
35 ngx_str_t key_start;
36 ngx_str_t schema;
37 ngx_str_t host_header;
38 ngx_str_t port;
39 ngx_str_t uri;
40 } ngx_http_proxy_vars_t;
41
42
43 typedef struct {
44 ngx_http_upstream_conf_t upstream;
45
46 ngx_array_t *flushes;
47 ngx_array_t *body_set_len;
48 ngx_array_t *body_set;
49 ngx_array_t *headers_set_len;
50 ngx_array_t *headers_set;
51 ngx_hash_t headers_set_hash;
52
53 ngx_array_t *headers_source;
54 ngx_array_t *headers_names;
55
56 ngx_array_t *proxy_lengths;
57 ngx_array_t *proxy_values;
58
59 ngx_array_t *redirects;
60
61 ngx_str_t body_source;
62
63 ngx_str_t method;
64 ngx_str_t location;
65 ngx_str_t url;
66
67 #if (NGX_HTTP_CACHE)
68 ngx_http_complex_value_t cache_key;
69 #endif
70
71 ngx_http_proxy_vars_t vars;
72
73 ngx_flag_t redirect;
74
75 ngx_uint_t headers_hash_max_size;
76 ngx_uint_t headers_hash_bucket_size;
77 } ngx_http_proxy_loc_conf_t;
78
79
80 typedef struct {
81 ngx_uint_t status;
82 ngx_uint_t status_count;
83 u_char *status_start;
84 u_char *status_end;
85
86 ngx_http_proxy_vars_t vars;
87
88 size_t internal_body_length;
89 } ngx_http_proxy_ctx_t;
90
91
92 #define NGX_HTTP_PROXY_PARSE_NO_HEADER 20
93
94
95 static ngx_int_t ngx_http_proxy_eval(ngx_http_request_t *r,
96 ngx_http_proxy_ctx_t *ctx, ngx_http_proxy_loc_conf_t *plcf);
97 #if (NGX_HTTP_CACHE)
98 static ngx_int_t ngx_http_proxy_create_key(ngx_http_request_t *r);
99 #endif
100 static ngx_int_t ngx_http_proxy_create_request(ngx_http_request_t *r);
101 static ngx_int_t ngx_http_proxy_reinit_request(ngx_http_request_t *r);
102 static ngx_int_t ngx_http_proxy_process_status_line(ngx_http_request_t *r);
103 static ngx_int_t ngx_http_proxy_parse_status_line(ngx_http_request_t *r,
104 ngx_http_proxy_ctx_t *ctx);
105 static ngx_int_t ngx_http_proxy_process_header(ngx_http_request_t *r);
106 static void ngx_http_proxy_abort_request(ngx_http_request_t *r);
107 static void ngx_http_proxy_finalize_request(ngx_http_request_t *r,
108 ngx_int_t rc);
109
110 static ngx_int_t ngx_http_proxy_host_variable(ngx_http_request_t *r,
111 ngx_http_variable_value_t *v, uintptr_t data);
112 static ngx_int_t ngx_http_proxy_port_variable(ngx_http_request_t *r,
113 ngx_http_variable_value_t *v, uintptr_t data);
114 static ngx_int_t
115 ngx_http_proxy_add_x_forwarded_for_variable(ngx_http_request_t *r,
116 ngx_http_variable_value_t *v, uintptr_t data);
117 static ngx_int_t
118 ngx_http_proxy_internal_body_length_variable(ngx_http_request_t *r,
119 ngx_http_variable_value_t *v, uintptr_t data);
120 static ngx_int_t ngx_http_proxy_rewrite_redirect(ngx_http_request_t *r,
121 ngx_table_elt_t *h, size_t prefix);
122
123 static ngx_int_t ngx_http_proxy_add_variables(ngx_conf_t *cf);
124 static void *ngx_http_proxy_create_loc_conf(ngx_conf_t *cf);
125 static char *ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf,
126 void *parent, void *child);
127 static ngx_int_t ngx_http_proxy_merge_headers(ngx_conf_t *cf,
128 ngx_http_proxy_loc_conf_t *conf, ngx_http_proxy_loc_conf_t *prev);
129
130 static char *ngx_http_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd,
131 void *conf);
132 static char *ngx_http_proxy_redirect(ngx_conf_t *cf, ngx_command_t *cmd,
133 void *conf);
134 static char *ngx_http_proxy_store(ngx_conf_t *cf, ngx_command_t *cmd,
135 void *conf);
136 #if (NGX_HTTP_CACHE)
137 static char *ngx_http_proxy_cache(ngx_conf_t *cf, ngx_command_t *cmd,
138 void *conf);
139 static char *ngx_http_proxy_cache_key(ngx_conf_t *cf, ngx_command_t *cmd,
140 void *conf);
141 #endif
142
143 static char *ngx_http_proxy_lowat_check(ngx_conf_t *cf, void *post, void *data);
144
145 static char *ngx_http_proxy_upstream_max_fails_unsupported(ngx_conf_t *cf,
146 ngx_command_t *cmd, void *conf);
147 static char *ngx_http_proxy_upstream_fail_timeout_unsupported(ngx_conf_t *cf,
148 ngx_command_t *cmd, void *conf);
149
150 #if (NGX_HTTP_SSL)
151 static ngx_int_t ngx_http_proxy_set_ssl(ngx_conf_t *cf,
152 ngx_http_proxy_loc_conf_t *plcf);
153 #endif
154 static void ngx_http_proxy_set_vars(ngx_url_t *u, ngx_http_proxy_vars_t *v);
155
156
157 static ngx_conf_post_t ngx_http_proxy_lowat_post =
158 { ngx_http_proxy_lowat_check };
159
160
161 static ngx_conf_bitmask_t ngx_http_proxy_next_upstream_masks[] = {
162 { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR },
163 { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
164 { ngx_string("invalid_header"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
165 { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 },
166 { ngx_string("http_502"), NGX_HTTP_UPSTREAM_FT_HTTP_502 },
167 { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
168 { ngx_string("http_504"), NGX_HTTP_UPSTREAM_FT_HTTP_504 },
169 { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
170 { ngx_string("updating"), NGX_HTTP_UPSTREAM_FT_UPDATING },
171 { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
172 { ngx_null_string, 0 }
173 };
174
175
176 static ngx_conf_bitmask_t ngx_http_proxy_ignore_headers_masks[] = {
177 { ngx_string("X-Accel-Redirect"), NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT },
178 { ngx_string("X-Accel-Expires"), NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES },
179 { ngx_string("Expires"), NGX_HTTP_UPSTREAM_IGN_EXPIRES },
180 { ngx_string("Cache-Control"), NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL },
181 { ngx_null_string, 0 }
182 };
183
184
185 ngx_module_t ngx_http_proxy_module;
186
187
188 static ngx_command_t ngx_http_proxy_commands[] = {
189
190 { ngx_string("proxy_pass"),
191 NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_HTTP_LMT_CONF|NGX_CONF_TAKE1,
192 ngx_http_proxy_pass,
193 NGX_HTTP_LOC_CONF_OFFSET,
194 0,
195 NULL },
196
197 { ngx_string("proxy_redirect"),
198 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
199 ngx_http_proxy_redirect,
200 NGX_HTTP_LOC_CONF_OFFSET,
201 0,
202 NULL },
203
204 { ngx_string("proxy_store"),
205 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
206 ngx_http_proxy_store,
207 NGX_HTTP_LOC_CONF_OFFSET,
208 0,
209 NULL },
210
211 { ngx_string("proxy_store_access"),
212 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
213 ngx_conf_set_access_slot,
214 NGX_HTTP_LOC_CONF_OFFSET,
215 offsetof(ngx_http_proxy_loc_conf_t, upstream.store_access),
216 NULL },
217
218 { ngx_string("proxy_buffering"),
219 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
220 ngx_conf_set_flag_slot,
221 NGX_HTTP_LOC_CONF_OFFSET,
222 offsetof(ngx_http_proxy_loc_conf_t, upstream.buffering),
223 NULL },
224
225 { ngx_string("proxy_ignore_client_abort"),
226 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
227 ngx_conf_set_flag_slot,
228 NGX_HTTP_LOC_CONF_OFFSET,
229 offsetof(ngx_http_proxy_loc_conf_t, upstream.ignore_client_abort),
230 NULL },
231
232 { ngx_string("proxy_bind"),
233 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
234 ngx_http_upstream_bind_set_slot,
235 NGX_HTTP_LOC_CONF_OFFSET,
236 offsetof(ngx_http_proxy_loc_conf_t, upstream.local),
237 NULL },
238
239 { ngx_string("proxy_connect_timeout"),
240 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
241 ngx_conf_set_msec_slot,
242 NGX_HTTP_LOC_CONF_OFFSET,
243 offsetof(ngx_http_proxy_loc_conf_t, upstream.connect_timeout),
244 NULL },
245
246 { ngx_string("proxy_send_timeout"),
247 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
248 ngx_conf_set_msec_slot,
249 NGX_HTTP_LOC_CONF_OFFSET,
250 offsetof(ngx_http_proxy_loc_conf_t, upstream.send_timeout),
251 NULL },
252
253 { ngx_string("proxy_send_lowat"),
254 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
255 ngx_conf_set_size_slot,
256 NGX_HTTP_LOC_CONF_OFFSET,
257 offsetof(ngx_http_proxy_loc_conf_t, upstream.send_lowat),
258 &ngx_http_proxy_lowat_post },
259
260 { ngx_string("proxy_intercept_errors"),
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.intercept_errors),
265 NULL },
266
267 { ngx_string("proxy_set_header"),
268 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
269 ngx_conf_set_keyval_slot,
270 NGX_HTTP_LOC_CONF_OFFSET,
271 offsetof(ngx_http_proxy_loc_conf_t, headers_source),
272 NULL },
273
274 { ngx_string("proxy_headers_hash_max_size"),
275 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
276 ngx_conf_set_num_slot,
277 NGX_HTTP_LOC_CONF_OFFSET,
278 offsetof(ngx_http_proxy_loc_conf_t, headers_hash_max_size),
279 NULL },
280
281 { ngx_string("proxy_headers_hash_bucket_size"),
282 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
283 ngx_conf_set_num_slot,
284 NGX_HTTP_LOC_CONF_OFFSET,
285 offsetof(ngx_http_proxy_loc_conf_t, headers_hash_bucket_size),
286 NULL },
287
288 { ngx_string("proxy_set_body"),
289 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
290 ngx_conf_set_str_slot,
291 NGX_HTTP_LOC_CONF_OFFSET,
292 offsetof(ngx_http_proxy_loc_conf_t, body_source),
293 NULL },
294
295 { ngx_string("proxy_method"),
296 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
297 ngx_conf_set_str_slot,
298 NGX_HTTP_LOC_CONF_OFFSET,
299 offsetof(ngx_http_proxy_loc_conf_t, method),
300 NULL },
301
302 { ngx_string("proxy_pass_request_headers"),
303 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
304 ngx_conf_set_flag_slot,
305 NGX_HTTP_LOC_CONF_OFFSET,
306 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_request_headers),
307 NULL },
308
309 { ngx_string("proxy_pass_request_body"),
310 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
311 ngx_conf_set_flag_slot,
312 NGX_HTTP_LOC_CONF_OFFSET,
313 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_request_body),
314 NULL },
315
316 { ngx_string("proxy_buffer_size"),
317 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
318 ngx_conf_set_size_slot,
319 NGX_HTTP_LOC_CONF_OFFSET,
320 offsetof(ngx_http_proxy_loc_conf_t, upstream.buffer_size),
321 NULL },
322
323 { ngx_string("proxy_read_timeout"),
324 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
325 ngx_conf_set_msec_slot,
326 NGX_HTTP_LOC_CONF_OFFSET,
327 offsetof(ngx_http_proxy_loc_conf_t, upstream.read_timeout),
328 NULL },
329
330 { ngx_string("proxy_buffers"),
331 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
332 ngx_conf_set_bufs_slot,
333 NGX_HTTP_LOC_CONF_OFFSET,
334 offsetof(ngx_http_proxy_loc_conf_t, upstream.bufs),
335 NULL },
336
337 { ngx_string("proxy_busy_buffers_size"),
338 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
339 ngx_conf_set_size_slot,
340 NGX_HTTP_LOC_CONF_OFFSET,
341 offsetof(ngx_http_proxy_loc_conf_t, upstream.busy_buffers_size_conf),
342 NULL },
343
344 #if (NGX_HTTP_CACHE)
345
346 { ngx_string("proxy_cache"),
347 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
348 ngx_http_proxy_cache,
349 NGX_HTTP_LOC_CONF_OFFSET,
350 0,
351 NULL },
352
353 { ngx_string("proxy_cache_key"),
354 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
355 ngx_http_proxy_cache_key,
356 NGX_HTTP_LOC_CONF_OFFSET,
357 0,
358 NULL },
359
360 { ngx_string("proxy_cache_path"),
361 NGX_HTTP_MAIN_CONF|NGX_CONF_2MORE,
362 ngx_http_file_cache_set_slot,
363 0,
364 0,
365 &ngx_http_proxy_module },
366
367 { ngx_string("proxy_cache_valid"),
368 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
369 ngx_http_file_cache_valid_set_slot,
370 NGX_HTTP_LOC_CONF_OFFSET,
371 offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_valid),
372 NULL },
373
374 { ngx_string("proxy_cache_min_uses"),
375 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
376 ngx_conf_set_num_slot,
377 NGX_HTTP_LOC_CONF_OFFSET,
378 offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_min_uses),
379 NULL },
380
381 { ngx_string("proxy_cache_use_stale"),
382 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
383 ngx_conf_set_bitmask_slot,
384 NGX_HTTP_LOC_CONF_OFFSET,
385 offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_use_stale),
386 &ngx_http_proxy_next_upstream_masks },
387
388 { ngx_string("proxy_cache_methods"),
389 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
390 ngx_conf_set_bitmask_slot,
391 NGX_HTTP_LOC_CONF_OFFSET,
392 offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_methods),
393 &ngx_http_upstream_cache_method_mask },
394
395 #endif
396
397 { ngx_string("proxy_temp_path"),
398 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
399 ngx_conf_set_path_slot,
400 NGX_HTTP_LOC_CONF_OFFSET,
401 offsetof(ngx_http_proxy_loc_conf_t, upstream.temp_path),
402 NULL },
403
404 { ngx_string("proxy_max_temp_file_size"),
405 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
406 ngx_conf_set_size_slot,
407 NGX_HTTP_LOC_CONF_OFFSET,
408 offsetof(ngx_http_proxy_loc_conf_t, upstream.max_temp_file_size_conf),
409 NULL },
410
411 { ngx_string("proxy_temp_file_write_size"),
412 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
413 ngx_conf_set_size_slot,
414 NGX_HTTP_LOC_CONF_OFFSET,
415 offsetof(ngx_http_proxy_loc_conf_t, upstream.temp_file_write_size_conf),
416 NULL },
417
418 { ngx_string("proxy_next_upstream"),
419 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
420 ngx_conf_set_bitmask_slot,
421 NGX_HTTP_LOC_CONF_OFFSET,
422 offsetof(ngx_http_proxy_loc_conf_t, upstream.next_upstream),
423 &ngx_http_proxy_next_upstream_masks },
424
425 { ngx_string("proxy_upstream_max_fails"),
426 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
427 ngx_http_proxy_upstream_max_fails_unsupported,
428 0,
429 0,
430 NULL },
431
432 { ngx_string("proxy_upstream_fail_timeout"),
433 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
434 ngx_http_proxy_upstream_fail_timeout_unsupported,
435 0,
436 0,
437 NULL },
438
439 { ngx_string("proxy_pass_header"),
440 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
441 ngx_conf_set_str_array_slot,
442 NGX_HTTP_LOC_CONF_OFFSET,
443 offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_headers),
444 NULL },
445
446 { ngx_string("proxy_hide_header"),
447 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
448 ngx_conf_set_str_array_slot,
449 NGX_HTTP_LOC_CONF_OFFSET,
450 offsetof(ngx_http_proxy_loc_conf_t, upstream.hide_headers),
451 NULL },
452
453 { ngx_string("proxy_ignore_headers"),
454 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
455 ngx_conf_set_bitmask_slot,
456 NGX_HTTP_LOC_CONF_OFFSET,
457 offsetof(ngx_http_proxy_loc_conf_t, upstream.ignore_headers),
458 &ngx_http_proxy_ignore_headers_masks },
459
460 #if (NGX_HTTP_SSL)
461
462 { ngx_string("proxy_ssl_session_reuse"),
463 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
464 ngx_conf_set_flag_slot,
465 NGX_HTTP_LOC_CONF_OFFSET,
466 offsetof(ngx_http_proxy_loc_conf_t, upstream.ssl_session_reuse),
467 NULL },
468
469 #endif
470
471 ngx_null_command
472 };
473
474
475 static ngx_http_module_t ngx_http_proxy_module_ctx = {
476 ngx_http_proxy_add_variables, /* preconfiguration */
477 NULL, /* postconfiguration */
478
479 NULL, /* create main configuration */
480 NULL, /* init main configuration */
481
482 NULL, /* create server configuration */
483 NULL, /* merge server configuration */
484
485 ngx_http_proxy_create_loc_conf, /* create location configration */
486 ngx_http_proxy_merge_loc_conf /* merge location configration */
487 };
488
489
490 ngx_module_t ngx_http_proxy_module = {
491 NGX_MODULE_V1,
492 &ngx_http_proxy_module_ctx, /* module context */
493 ngx_http_proxy_commands, /* module directives */
494 NGX_HTTP_MODULE, /* module type */
495 NULL, /* init master */
496 NULL, /* init module */
497 NULL, /* init process */
498 NULL, /* init thread */
499 NULL, /* exit thread */
500 NULL, /* exit process */
501 NULL, /* exit master */
502 NGX_MODULE_V1_PADDING
503 };
504
505
506 static char ngx_http_proxy_version[] = " HTTP/1.0" CRLF;
507
508
509 static ngx_keyval_t ngx_http_proxy_headers[] = {
510 { ngx_string("Host"), ngx_string("$proxy_host") },
511 { ngx_string("Connection"), ngx_string("close") },
512 { ngx_string("Keep-Alive"), ngx_string("") },
513 { ngx_string("Expect"), ngx_string("") },
514 { ngx_null_string, ngx_null_string }
515 };
516
517
518 static ngx_str_t ngx_http_proxy_hide_headers[] = {
519 ngx_string("Date"),
520 ngx_string("Server"),
521 ngx_string("X-Pad"),
522 ngx_string("X-Accel-Expires"),
523 ngx_string("X-Accel-Redirect"),
524 ngx_string("X-Accel-Limit-Rate"),
525 ngx_string("X-Accel-Buffering"),
526 ngx_string("X-Accel-Charset"),
527 ngx_null_string
528 };
529
530
531 #if (NGX_HTTP_CACHE)
532
533 static ngx_keyval_t ngx_http_proxy_cache_headers[] = {
534 { ngx_string("Host"), ngx_string("$proxy_host") },
535 { ngx_string("Connection"), ngx_string("close") },
536 { ngx_string("Keep-Alive"), ngx_string("") },
537 { ngx_string("Expect"), ngx_string("") },
538 { ngx_string("If-Modified-Since"), ngx_string("") },
539 { ngx_string("If-Unmodified-Since"), ngx_string("") },
540 { ngx_string("If-None-Match"), ngx_string("") },
541 { ngx_string("If-Match"), ngx_string("") },
542 { ngx_string("Range"), ngx_string("") },
543 { ngx_string("If-Range"), ngx_string("") },
544 { ngx_null_string, ngx_null_string }
545 };
546
547
548 static ngx_str_t ngx_http_proxy_hide_cache_headers[] = {
549 ngx_string("Date"),
550 ngx_string("Server"),
551 ngx_string("X-Pad"),
552 ngx_string("X-Accel-Expires"),
553 ngx_string("X-Accel-Redirect"),
554 ngx_string("X-Accel-Limit-Rate"),
555 ngx_string("X-Accel-Buffering"),
556 ngx_string("X-Accel-Charset"),
557 ngx_string("Set-Cookie"),
558 ngx_string("P3P"),
559 ngx_null_string
560 };
561
562 #endif
563
564
565 static ngx_http_variable_t ngx_http_proxy_vars[] = {
566
567 { ngx_string("proxy_host"), NULL, ngx_http_proxy_host_variable, 0,
568 NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
569
570 { ngx_string("proxy_port"), NULL, ngx_http_proxy_port_variable, 0,
571 NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
572
573 { ngx_string("proxy_add_x_forwarded_for"), NULL,
574 ngx_http_proxy_add_x_forwarded_for_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
575
576 #if 0
577 { ngx_string("proxy_add_via"), NULL, NULL, 0, NGX_HTTP_VAR_NOHASH, 0 },
578 #endif
579
580 { ngx_string("proxy_internal_body_length"), NULL,
581 ngx_http_proxy_internal_body_length_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
582
583 { ngx_null_string, NULL, NULL, 0, 0, 0 }
584 };
585
586
587 static ngx_path_init_t ngx_http_proxy_temp_path = {
588 ngx_string(NGX_HTTP_PROXY_TEMP_PATH), { 1, 2, 0 }
589 };
590
591
592 static ngx_int_t
593 ngx_http_proxy_handler(ngx_http_request_t *r)
594 {
595 ngx_int_t rc;
596 ngx_http_upstream_t *u;
597 ngx_http_proxy_ctx_t *ctx;
598 ngx_http_proxy_loc_conf_t *plcf;
599
600 if (ngx_http_upstream_create(r) != NGX_OK) {
601 return NGX_HTTP_INTERNAL_SERVER_ERROR;
602 }
603
604 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_proxy_ctx_t));
605 if (ctx == NULL) {
606 return NGX_ERROR;
607 }
608
609 ngx_http_set_ctx(r, ctx, ngx_http_proxy_module);
610
611 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
612
613 u = r->upstream;
614
615 if (plcf->proxy_lengths == 0) {
616 ctx->vars = plcf->vars;
617 u->schema = plcf->vars.schema;
618 #if (NGX_HTTP_SSL)
619 u->ssl = (plcf->upstream.ssl != NULL);
620 #endif
621
622 } else {
623 if (ngx_http_proxy_eval(r, ctx, plcf) != NGX_OK) {
624 return NGX_HTTP_INTERNAL_SERVER_ERROR;
625 }
626 }
627
628 u->output.tag = (ngx_buf_tag_t) &ngx_http_proxy_module;
629
630 u->conf = &plcf->upstream;
631
632 #if (NGX_HTTP_CACHE)
633 u->create_key = ngx_http_proxy_create_key;
634 #endif
635 u->create_request = ngx_http_proxy_create_request;
636 u->reinit_request = ngx_http_proxy_reinit_request;
637 u->process_header = ngx_http_proxy_process_status_line;
638 u->abort_request = ngx_http_proxy_abort_request;
639 u->finalize_request = ngx_http_proxy_finalize_request;
640 r->state = 0;
641
642 if (plcf->redirects) {
643 u->rewrite_redirect = ngx_http_proxy_rewrite_redirect;
644 }
645
646 u->buffering = plcf->upstream.buffering;
647
648 u->pipe = ngx_pcalloc(r->pool, sizeof(ngx_event_pipe_t));
649 if (u->pipe == NULL) {
650 return NGX_HTTP_INTERNAL_SERVER_ERROR;
651 }
652
653 u->pipe->input_filter = ngx_event_pipe_copy_input_filter;
654
655 u->accel = 1;
656
657 rc = ngx_http_read_client_request_body(r, ngx_http_upstream_init);
658
659 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
660 return rc;
661 }
662
663 return NGX_DONE;
664 }
665
666
667 static ngx_int_t
668 ngx_http_proxy_eval(ngx_http_request_t *r, ngx_http_proxy_ctx_t *ctx,
669 ngx_http_proxy_loc_conf_t *plcf)
670 {
671 u_char *p;
672 size_t add;
673 u_short port;
674 ngx_str_t proxy;
675 ngx_url_t url;
676 ngx_http_upstream_t *u;
677
678 if (ngx_http_script_run(r, &proxy, plcf->proxy_lengths->elts, 0,
679 plcf->proxy_values->elts)
680 == NULL)
681 {
682 return NGX_ERROR;
683 }
684
685 if (ngx_strncasecmp(proxy.data, (u_char *) "http://", 7) == 0) {
686
687 add = 7;
688 port = 80;
689
690 #if (NGX_HTTP_SSL)
691
692 } else if (ngx_strncasecmp(proxy.data, (u_char *) "https://", 8) == 0) {
693
694 add = 8;
695 port = 443;
696 r->upstream->ssl = 1;
697
698 #endif
699
700 } else {
701 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
702 "invalid URL prefix in \"%V\"", &proxy);
703 return NGX_ERROR;
704 }
705
706 u = r->upstream;
707
708 u->schema.len = add;
709 u->schema.data = proxy.data;
710
711 ngx_memzero(&url, sizeof(ngx_url_t));
712
713 url.url.len = proxy.len - add;
714 url.url.data = proxy.data + add;
715 url.default_port = port;
716 url.uri_part = 1;
717 url.no_resolve = 1;
718
719 if (ngx_parse_url(r->pool, &url) != NGX_OK) {
720 if (url.err) {
721 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
722 "%s in upstream \"%V\"", url.err, &url.url);
723 }
724
725 return NGX_ERROR;
726 }
727
728 if (url.uri.len) {
729 if (url.uri.data[0] == '?') {
730 p = ngx_pnalloc(r->pool, url.uri.len + 1);
731 if (p == NULL) {
732 return NGX_ERROR;
733 }
734
735 *p++ = '/';
736 ngx_memcpy(p, url.uri.data, url.uri.len);
737
738 url.uri.len++;
739 url.uri.data = p - 1;
740 }
741
742 } else {
743 url.uri = r->unparsed_uri;
744 }
745
746 ctx->vars.key_start = u->schema;
747
748 ngx_http_proxy_set_vars(&url, &ctx->vars);
749
750 u->resolved = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_resolved_t));
751 if (u->resolved == NULL) {
752 return NGX_ERROR;
753 }
754
755 if (url.addrs && url.addrs[0].sockaddr) {
756 u->resolved->sockaddr = url.addrs[0].sockaddr;
757 u->resolved->socklen = url.addrs[0].socklen;
758 u->resolved->naddrs = 1;
759 u->resolved->host = url.addrs[0].name;
760
761 } else {
762 u->resolved->host = url.host;
763 u->resolved->port = (in_port_t) (url.no_port ? port : url.port);
764 u->resolved->no_port = url.no_port;
765 }
766
767 return NGX_OK;
768 }
769
770
771 #if (NGX_HTTP_CACHE)
772
773 static ngx_int_t
774 ngx_http_proxy_create_key(ngx_http_request_t *r)
775 {
776 size_t len, loc_len;
777 u_char *p;
778 uintptr_t escape;
779 ngx_str_t *key;
780 ngx_http_upstream_t *u;
781 ngx_http_proxy_ctx_t *ctx;
782 ngx_http_proxy_loc_conf_t *plcf;
783
784 u = r->upstream;
785
786 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
787
788 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
789
790 key = ngx_array_push(&r->cache->keys);
791 if (key == NULL) {
792 return NGX_ERROR;
793 }
794
795 if (plcf->cache_key.value.len) {
796
797 if (ngx_http_complex_value(r, &plcf->cache_key, key) != NGX_OK) {
798 return NGX_ERROR;
799 }
800
801 return NGX_OK;
802 }
803
804 *key = ctx->vars.key_start;
805
806 key = ngx_array_push(&r->cache->keys);
807 if (key == NULL) {
808 return NGX_ERROR;
809 }
810
811 if (plcf->proxy_lengths) {
812
813 *key = ctx->vars.uri;
814 u->uri = ctx->vars.uri;
815
816 return NGX_OK;
817
818 } else if (ctx->vars.uri.len == 0 && r->valid_unparsed_uri && r == r->main)
819 {
820 *key = r->unparsed_uri;
821 u->uri = r->unparsed_uri;
822
823 return NGX_OK;
824 }
825
826 loc_len = (r->valid_location && ctx->vars.uri.len) ? plcf->location.len : 0;
827
828 if (r->quoted_uri || r->internal) {
829 escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len,
830 r->uri.len - loc_len, NGX_ESCAPE_URI);
831 } else {
832 escape = 0;
833 }
834
835 len = ctx->vars.uri.len + r->uri.len - loc_len + escape
836 + sizeof("?") - 1 + r->args.len;
837
838 p = ngx_pnalloc(r->pool, len);
839 if (p == NULL) {
840 return NGX_ERROR;
841 }
842
843 key->data = p;
844
845 if (r->valid_location) {
846 p = ngx_copy(p, ctx->vars.uri.data, ctx->vars.uri.len);
847 }
848
849 if (escape) {
850 ngx_escape_uri(p, r->uri.data + loc_len,
851 r->uri.len - loc_len, NGX_ESCAPE_URI);
852 p += r->uri.len - loc_len + escape;
853
854 } else {
855 p = ngx_copy(p, r->uri.data + loc_len, r->uri.len - loc_len);
856 }
857
858 if (r->args.len > 0) {
859 *p++ = '?';
860 p = ngx_copy(p, r->args.data, r->args.len);
861 }
862
863 key->len = p - key->data;
864 u->uri = *key;
865
866 return NGX_OK;
867 }
868
869 #endif
870
871
872 static ngx_int_t
873 ngx_http_proxy_create_request(ngx_http_request_t *r)
874 {
875 size_t len, uri_len, loc_len, body_len;
876 uintptr_t escape;
877 ngx_buf_t *b;
878 ngx_str_t method;
879 ngx_uint_t i, unparsed_uri;
880 ngx_chain_t *cl, *body;
881 ngx_list_part_t *part;
882 ngx_table_elt_t *header;
883 ngx_http_upstream_t *u;
884 ngx_http_proxy_ctx_t *ctx;
885 ngx_http_script_code_pt code;
886 ngx_http_script_engine_t e, le;
887 ngx_http_proxy_loc_conf_t *plcf;
888 ngx_http_script_len_code_pt lcode;
889
890 u = r->upstream;
891
892 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
893
894 if (u->method.len) {
895 /* HEAD was changed to GET to cache response */
896 method = u->method;
897 method.len++;
898
899 } else if (plcf->method.len) {
900 method = plcf->method;
901
902 } else {
903 method = r->method_name;
904 method.len++;
905 }
906
907 len = method.len + sizeof(ngx_http_proxy_version) - 1 + sizeof(CRLF) - 1;
908
909 escape = 0;
910 loc_len = 0;
911 unparsed_uri = 0;
912
913 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
914
915 if (plcf->proxy_lengths) {
916 uri_len = ctx->vars.uri.len;
917
918 } else if (ctx->vars.uri.len == 0 && r->valid_unparsed_uri && r == r->main)
919 {
920 unparsed_uri = 1;
921 uri_len = r->unparsed_uri.len;
922
923 } else {
924 loc_len = (r->valid_location && ctx->vars.uri.len) ?
925 plcf->location.len : 0;
926
927 if (r->quoted_uri || r->internal) {
928 escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len,
929 r->uri.len - loc_len, NGX_ESCAPE_URI);
930 }
931
932 uri_len = ctx->vars.uri.len + r->uri.len - loc_len + escape
933 + sizeof("?") - 1 + r->args.len;
934 }
935
936 if (uri_len == 0) {
937 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
938 "zero length URI to proxy");
939 return NGX_ERROR;
940 }
941
942 len += uri_len;
943
944 ngx_http_script_flush_no_cacheable_variables(r, plcf->flushes);
945
946 if (plcf->body_set_len) {
947 le.ip = plcf->body_set_len->elts;
948 le.request = r;
949 le.flushed = 1;
950 body_len = 0;
951
952 while (*(uintptr_t *) le.ip) {
953 lcode = *(ngx_http_script_len_code_pt *) le.ip;
954 body_len += lcode(&le);
955 }
956
957 ctx->internal_body_length = body_len;
958 len += body_len;
959 }
960
961 le.ip = plcf->headers_set_len->elts;
962 le.request = r;
963 le.flushed = 1;
964
965 while (*(uintptr_t *) le.ip) {
966 while (*(uintptr_t *) le.ip) {
967 lcode = *(ngx_http_script_len_code_pt *) le.ip;
968 len += lcode(&le);
969 }
970 le.ip += sizeof(uintptr_t);
971 }
972
973
974 if (plcf->upstream.pass_request_headers) {
975 part = &r->headers_in.headers.part;
976 header = part->elts;
977
978 for (i = 0; /* void */; i++) {
979
980 if (i >= part->nelts) {
981 if (part->next == NULL) {
982 break;
983 }
984
985 part = part->next;
986 header = part->elts;
987 i = 0;
988 }
989
990 if (ngx_hash_find(&plcf->headers_set_hash, header[i].hash,
991 header[i].lowcase_key, header[i].key.len))
992 {
993 continue;
994 }
995
996 len += header[i].key.len + sizeof(": ") - 1
997 + header[i].value.len + sizeof(CRLF) - 1;
998 }
999 }
1000
1001
1002 b = ngx_create_temp_buf(r->pool, len);
1003 if (b == NULL) {
1004 return NGX_ERROR;
1005 }
1006
1007 cl = ngx_alloc_chain_link(r->pool);
1008 if (cl == NULL) {
1009 return NGX_ERROR;
1010 }
1011
1012 cl->buf = b;
1013
1014
1015 /* the request line */
1016
1017 b->last = ngx_copy(b->last, method.data, method.len);
1018
1019 u->uri.data = b->last;
1020
1021 if (plcf->proxy_lengths) {
1022 b->last = ngx_copy(b->last, ctx->vars.uri.data, ctx->vars.uri.len);
1023
1024 } else if (unparsed_uri) {
1025 b->last = ngx_copy(b->last, r->unparsed_uri.data, r->unparsed_uri.len);
1026
1027 } else {
1028 if (r->valid_location) {
1029 b->last = ngx_copy(b->last, ctx->vars.uri.data, ctx->vars.uri.len);
1030 }
1031
1032 if (escape) {
1033 ngx_escape_uri(b->last, r->uri.data + loc_len,
1034 r->uri.len - loc_len, NGX_ESCAPE_URI);
1035 b->last += r->uri.len - loc_len + escape;
1036
1037 } else {
1038 b->last = ngx_copy(b->last, r->uri.data + loc_len,
1039 r->uri.len - loc_len);
1040 }
1041
1042 if (r->args.len > 0) {
1043 *b->last++ = '?';
1044 b->last = ngx_copy(b->last, r->args.data, r->args.len);
1045 }
1046 }
1047
1048 u->uri.len = b->last - u->uri.data;
1049
1050 b->last = ngx_cpymem(b->last, ngx_http_proxy_version,
1051 sizeof(ngx_http_proxy_version) - 1);
1052
1053 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
1054
1055 e.ip = plcf->headers_set->elts;
1056 e.pos = b->last;
1057 e.request = r;
1058 e.flushed = 1;
1059
1060 le.ip = plcf->headers_set_len->elts;
1061
1062 while (*(uintptr_t *) le.ip) {
1063 lcode = *(ngx_http_script_len_code_pt *) le.ip;
1064
1065 /* skip the header line name length */
1066 (void) lcode(&le);
1067
1068 if (*(ngx_http_script_len_code_pt *) le.ip) {
1069
1070 for (len = 0; *(uintptr_t *) le.ip; len += lcode(&le)) {
1071 lcode = *(ngx_http_script_len_code_pt *) le.ip;
1072 }
1073
1074 e.skip = (len == sizeof(CRLF) - 1) ? 1 : 0;
1075
1076 } else {
1077 e.skip = 0;
1078 }
1079
1080 le.ip += sizeof(uintptr_t);
1081
1082 while (*(uintptr_t *) e.ip) {
1083 code = *(ngx_http_script_code_pt *) e.ip;
1084 code((ngx_http_script_engine_t *) &e);
1085 }
1086 e.ip += sizeof(uintptr_t);
1087 }
1088
1089 b->last = e.pos;
1090
1091
1092 if (plcf->upstream.pass_request_headers) {
1093 part = &r->headers_in.headers.part;
1094 header = part->elts;
1095
1096 for (i = 0; /* void */; i++) {
1097
1098 if (i >= part->nelts) {
1099 if (part->next == NULL) {
1100 break;
1101 }
1102
1103 part = part->next;
1104 header = part->elts;
1105 i = 0;
1106 }
1107
1108 if (ngx_hash_find(&plcf->headers_set_hash, header[i].hash,
1109 header[i].lowcase_key, header[i].key.len))
1110 {
1111 continue;
1112 }
1113
1114 b->last = ngx_copy(b->last, header[i].key.data, header[i].key.len);
1115
1116 *b->last++ = ':'; *b->last++ = ' ';
1117
1118 b->last = ngx_copy(b->last, header[i].value.data,
1119 header[i].value.len);
1120
1121 *b->last++ = CR; *b->last++ = LF;
1122
1123 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1124 "http proxy header: \"%V: %V\"",
1125 &header[i].key, &header[i].value);
1126 }
1127 }
1128
1129
1130 /* add "\r\n" at the header end */
1131 *b->last++ = CR; *b->last++ = LF;
1132
1133 if (plcf->body_set) {
1134 e.ip = plcf->body_set->elts;
1135 e.pos = b->last;
1136
1137 while (*(uintptr_t *) e.ip) {
1138 code = *(ngx_http_script_code_pt *) e.ip;
1139 code((ngx_http_script_engine_t *) &e);
1140 }
1141
1142 b->last = e.pos;
1143 }
1144
1145 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1146 "http proxy header:\n\"%*s\"",
1147 (size_t) (b->last - b->pos), b->pos);
1148
1149 if (plcf->body_set == NULL && plcf->upstream.pass_request_body) {
1150
1151 body = u->request_bufs;
1152 u->request_bufs = cl;
1153
1154 while (body) {
1155 b = ngx_alloc_buf(r->pool);
1156 if (b == NULL) {
1157 return NGX_ERROR;
1158 }
1159
1160 ngx_memcpy(b, body->buf, sizeof(ngx_buf_t));
1161
1162 cl->next = ngx_alloc_chain_link(r->pool);
1163 if (cl->next == NULL) {
1164 return NGX_ERROR;
1165 }
1166
1167 cl = cl->next;
1168 cl->buf = b;
1169
1170 body = body->next;
1171 }
1172
1173 b->flush = 1;
1174
1175 } else {
1176 u->request_bufs = cl;
1177 }
1178
1179 cl->next = NULL;
1180
1181 return NGX_OK;
1182 }
1183
1184
1185 static ngx_int_t
1186 ngx_http_proxy_reinit_request(ngx_http_request_t *r)
1187 {
1188 ngx_http_proxy_ctx_t *ctx;
1189
1190 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
1191
1192 if (ctx == NULL) {
1193 return NGX_OK;
1194 }
1195
1196 ctx->status = 0;
1197 ctx->status_count = 0;
1198 ctx->status_start = NULL;
1199 ctx->status_end = NULL;
1200
1201 r->upstream->process_header = ngx_http_proxy_process_status_line;
1202 r->state = 0;
1203
1204 return NGX_OK;
1205 }
1206
1207
1208 static ngx_int_t
1209 ngx_http_proxy_process_status_line(ngx_http_request_t *r)
1210 {
1211 ngx_int_t rc;
1212 ngx_http_upstream_t *u;
1213 ngx_http_proxy_ctx_t *ctx;
1214
1215 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
1216
1217 if (ctx == NULL) {
1218 return NGX_ERROR;
1219 }
1220
1221 rc = ngx_http_proxy_parse_status_line(r, ctx);
1222
1223 if (rc == NGX_AGAIN) {
1224 return rc;
1225 }
1226
1227 u = r->upstream;
1228
1229 if (rc == NGX_HTTP_PROXY_PARSE_NO_HEADER) {
1230
1231 #if (NGX_HTTP_CACHE)
1232
1233 if (r->cache) {
1234 r->http_version = NGX_HTTP_VERSION_9;
1235 return NGX_OK;
1236 }
1237
1238 #endif
1239
1240 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1241 "upstream sent no valid HTTP/1.0 header");
1242
1243 #if 0
1244 if (u->accel) {
1245 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
1246 }
1247 #endif
1248
1249 r->http_version = NGX_HTTP_VERSION_9;
1250 u->state->status = NGX_HTTP_OK;
1251
1252 return NGX_OK;
1253 }
1254
1255 if (u->state) {
1256 u->state->status = ctx->status;
1257 }
1258
1259 u->headers_in.status_n = ctx->status;
1260
1261 u->headers_in.status_line.len = ctx->status_end - ctx->status_start;
1262 u->headers_in.status_line.data = ngx_pnalloc(r->pool,
1263 u->headers_in.status_line.len);
1264 if (u->headers_in.status_line.data == NULL) {
1265 return NGX_ERROR;
1266 }
1267
1268 ngx_memcpy(u->headers_in.status_line.data, ctx->status_start,
1269 u->headers_in.status_line.len);
1270
1271 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1272 "http proxy status %ui \"%V\"",
1273 u->headers_in.status_n, &u->headers_in.status_line);
1274
1275 u->process_header = ngx_http_proxy_process_header;
1276
1277 return ngx_http_proxy_process_header(r);
1278 }
1279
1280
1281 static ngx_int_t
1282 ngx_http_proxy_parse_status_line(ngx_http_request_t *r,
1283 ngx_http_proxy_ctx_t *ctx)
1284 {
1285 u_char ch;
1286 u_char *p;
1287 ngx_http_upstream_t *u;
1288 enum {
1289 sw_start = 0,
1290 sw_H,
1291 sw_HT,
1292 sw_HTT,
1293 sw_HTTP,
1294 sw_first_major_digit,
1295 sw_major_digit,
1296 sw_first_minor_digit,
1297 sw_minor_digit,
1298 sw_status,
1299 sw_space_after_status,
1300 sw_status_text,
1301 sw_almost_done
1302 } state;
1303
1304 u = r->upstream;
1305
1306 state = r->state;
1307
1308 for (p = u->buffer.pos; p < u->buffer.last; p++) {
1309 ch = *p;
1310
1311 switch (state) {
1312
1313 /* "HTTP/" */
1314 case sw_start:
1315 switch (ch) {
1316 case 'H':
1317 state = sw_H;
1318 break;
1319 default:
1320 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1321 }
1322 break;
1323
1324 case sw_H:
1325 switch (ch) {
1326 case 'T':
1327 state = sw_HT;
1328 break;
1329 default:
1330 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1331 }
1332 break;
1333
1334 case sw_HT:
1335 switch (ch) {
1336 case 'T':
1337 state = sw_HTT;
1338 break;
1339 default:
1340 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1341 }
1342 break;
1343
1344 case sw_HTT:
1345 switch (ch) {
1346 case 'P':
1347 state = sw_HTTP;
1348 break;
1349 default:
1350 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1351 }
1352 break;
1353
1354 case sw_HTTP:
1355 switch (ch) {
1356 case '/':
1357 state = sw_first_major_digit;
1358 break;
1359 default:
1360 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1361 }
1362 break;
1363
1364 /* the first digit of major HTTP version */
1365 case sw_first_major_digit:
1366 if (ch < '1' || ch > '9') {
1367 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1368 }
1369
1370 state = sw_major_digit;
1371 break;
1372
1373 /* the major HTTP version or dot */
1374 case sw_major_digit:
1375 if (ch == '.') {
1376 state = sw_first_minor_digit;
1377 break;
1378 }
1379
1380 if (ch < '0' || ch > '9') {
1381 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1382 }
1383
1384 break;
1385
1386 /* the first digit of minor HTTP version */
1387 case sw_first_minor_digit:
1388 if (ch < '0' || ch > '9') {
1389 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1390 }
1391
1392 state = sw_minor_digit;
1393 break;
1394
1395 /* the minor HTTP version or the end of the request line */
1396 case sw_minor_digit:
1397 if (ch == ' ') {
1398 state = sw_status;
1399 break;
1400 }
1401
1402 if (ch < '0' || ch > '9') {
1403 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1404 }
1405
1406 break;
1407
1408 /* HTTP status code */
1409 case sw_status:
1410 if (ch == ' ') {
1411 break;
1412 }
1413
1414 if (ch < '0' || ch > '9') {
1415 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1416 }
1417
1418 ctx->status = ctx->status * 10 + ch - '0';
1419
1420 if (++ctx->status_count == 3) {
1421 state = sw_space_after_status;
1422 ctx->status_start = p - 2;
1423 }
1424
1425 break;
1426
1427 /* space or end of line */
1428 case sw_space_after_status:
1429 switch (ch) {
1430 case ' ':
1431 state = sw_status_text;
1432 break;
1433 case '.': /* IIS may send 403.1, 403.2, etc */
1434 state = sw_status_text;
1435 break;
1436 case CR:
1437 state = sw_almost_done;
1438 break;
1439 case LF:
1440 goto done;
1441 default:
1442 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1443 }
1444 break;
1445
1446 /* any text until end of line */
1447 case sw_status_text:
1448 switch (ch) {
1449 case CR:
1450 state = sw_almost_done;
1451
1452 break;
1453 case LF:
1454 goto done;
1455 }
1456 break;
1457
1458 /* end of status line */
1459 case sw_almost_done:
1460 ctx->status_end = p - 1;
1461 switch (ch) {
1462 case LF:
1463 goto done;
1464 default:
1465 return NGX_HTTP_PROXY_PARSE_NO_HEADER;
1466 }
1467 }
1468 }
1469
1470 u->buffer.pos = p;
1471 r->state = state;
1472
1473 return NGX_AGAIN;
1474
1475 done:
1476
1477 u->buffer.pos = p + 1;
1478
1479 if (ctx->status_end == NULL) {
1480 ctx->status_end = p;
1481 }
1482
1483 r->state = sw_start;
1484
1485 return NGX_OK;
1486 }
1487
1488
1489 static ngx_int_t
1490 ngx_http_proxy_process_header(ngx_http_request_t *r)
1491 {
1492 ngx_int_t rc;
1493 ngx_table_elt_t *h;
1494 ngx_http_upstream_header_t *hh;
1495 ngx_http_upstream_main_conf_t *umcf;
1496
1497 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
1498
1499 for ( ;; ) {
1500
1501 rc = ngx_http_parse_header_line(r, &r->upstream->buffer, 1);
1502
1503 if (rc == NGX_OK) {
1504
1505 /* a header line has been parsed successfully */
1506
1507 h = ngx_list_push(&r->upstream->headers_in.headers);
1508 if (h == NULL) {
1509 return NGX_ERROR;
1510 }
1511
1512 h->hash = r->header_hash;
1513
1514 h->key.len = r->header_name_end - r->header_name_start;
1515 h->value.len = r->header_end - r->header_start;
1516
1517 h->key.data = ngx_pnalloc(r->pool,
1518 h->key.len + 1 + h->value.len + 1 + h->key.len);
1519 if (h->key.data == NULL) {
1520 return NGX_ERROR;
1521 }
1522
1523 h->value.data = h->key.data + h->key.len + 1;
1524 h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1;
1525
1526 ngx_cpystrn(h->key.data, r->header_name_start, h->key.len + 1);
1527 ngx_cpystrn(h->value.data, r->header_start, h->value.len + 1);
1528
1529 if (h->key.len == r->lowcase_index) {
1530 ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);
1531
1532 } else {
1533 ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
1534 }
1535
1536 hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
1537 h->lowcase_key, h->key.len);
1538
1539 if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
1540 return NGX_ERROR;
1541 }
1542
1543 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1544 "http proxy header: \"%V: %V\"",
1545 &h->key, &h->value);
1546
1547 continue;
1548 }
1549
1550 if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
1551
1552 /* a whole header has been parsed successfully */
1553
1554 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1555 "http proxy header done");
1556
1557 /*
1558 * if no "Server" and "Date" in header line,
1559 * then add the special empty headers
1560 */
1561
1562 if (r->upstream->headers_in.server == NULL) {
1563 h = ngx_list_push(&r->upstream->headers_in.headers);
1564 if (h == NULL) {
1565 return NGX_ERROR;
1566 }
1567
1568 h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash(
1569 ngx_hash('s', 'e'), 'r'), 'v'), 'e'), 'r');
1570
1571 h->key.len = sizeof("Server") - 1;
1572 h->key.data = (u_char *) "Server";
1573 h->value.len = 0;
1574 h->value.data = NULL;
1575 h->lowcase_key = (u_char *) "server";
1576 }
1577
1578 if (r->upstream->headers_in.date == NULL) {
1579 h = ngx_list_push(&r->upstream->headers_in.headers);
1580 if (h == NULL) {
1581 return NGX_ERROR;
1582 }
1583
1584 h->hash = ngx_hash(ngx_hash(ngx_hash('d', 'a'), 't'), 'e');
1585
1586 h->key.len = sizeof("Date") - 1;
1587 h->key.data = (u_char *) "Date";
1588 h->value.len = 0;
1589 h->value.data = NULL;
1590 h->lowcase_key = (u_char *) "date";
1591 }
1592
1593 return NGX_OK;
1594 }
1595
1596 if (rc == NGX_AGAIN) {
1597 return NGX_AGAIN;
1598 }
1599
1600 /* there was error while a header line parsing */
1601
1602 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1603 "upstream sent invalid header");
1604
1605 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
1606 }
1607 }
1608
1609
1610 static void
1611 ngx_http_proxy_abort_request(ngx_http_request_t *r)
1612 {
1613 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1614 "abort http proxy request");
1615
1616 return;
1617 }
1618
1619
1620 static void
1621 ngx_http_proxy_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
1622 {
1623 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1624 "finalize http proxy request");
1625
1626 return;
1627 }
1628
1629
1630 static ngx_int_t
1631 ngx_http_proxy_host_variable(ngx_http_request_t *r,
1632 ngx_http_variable_value_t *v, uintptr_t data)
1633 {
1634 ngx_http_proxy_ctx_t *ctx;
1635
1636 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
1637
1638 if (ctx == NULL) {
1639 v->not_found = 1;
1640 return NGX_OK;
1641 }
1642
1643 v->len = ctx->vars.host_header.len;
1644 v->valid = 1;
1645 v->no_cacheable = 0;
1646 v->not_found = 0;
1647 v->data = ctx->vars.host_header.data;
1648
1649 return NGX_OK;
1650 }
1651
1652
1653 static ngx_int_t
1654 ngx_http_proxy_port_variable(ngx_http_request_t *r,
1655 ngx_http_variable_value_t *v, uintptr_t data)
1656 {
1657 ngx_http_proxy_ctx_t *ctx;
1658
1659 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
1660
1661 if (ctx == NULL) {
1662 v->not_found = 1;
1663 return NGX_OK;
1664 }
1665
1666 v->len = ctx->vars.port.len;
1667 v->valid = 1;
1668 v->no_cacheable = 0;
1669 v->not_found = 0;
1670 v->data = ctx->vars.port.data;
1671
1672 return NGX_OK;
1673 }
1674
1675
1676 static ngx_int_t
1677 ngx_http_proxy_add_x_forwarded_for_variable(ngx_http_request_t *r,
1678 ngx_http_variable_value_t *v, uintptr_t data)
1679 {
1680 u_char *p;
1681
1682 v->valid = 1;
1683 v->no_cacheable = 0;
1684 v->not_found = 0;
1685
1686 if (r->headers_in.x_forwarded_for == NULL) {
1687 v->len = r->connection->addr_text.len;
1688 v->data = r->connection->addr_text.data;
1689 return NGX_OK;
1690 }
1691
1692 v->len = r->headers_in.x_forwarded_for->value.len
1693 + sizeof(", ") - 1 + r->connection->addr_text.len;
1694
1695 p = ngx_pnalloc(r->pool, v->len);
1696 if (p == NULL) {
1697 return NGX_ERROR;
1698 }
1699
1700 v->data = p;
1701
1702 p = ngx_copy(p, r->headers_in.x_forwarded_for->value.data,
1703 r->headers_in.x_forwarded_for->value.len);
1704
1705 *p++ = ','; *p++ = ' ';
1706
1707 ngx_memcpy(p, r->connection->addr_text.data, r->connection->addr_text.len);
1708
1709 return NGX_OK;
1710 }
1711
1712
1713 static ngx_int_t
1714 ngx_http_proxy_internal_body_length_variable(ngx_http_request_t *r,
1715 ngx_http_variable_value_t *v, uintptr_t data)
1716 {
1717 ngx_http_proxy_ctx_t *ctx;
1718
1719 ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
1720
1721 if (ctx == NULL) {
1722 v->not_found = 1;
1723 return NGX_OK;
1724 }
1725
1726 v->valid = 1;
1727 v->no_cacheable = 0;
1728 v->not_found = 0;
1729
1730 v->data = ngx_pnalloc(r->connection->pool, NGX_SIZE_T_LEN);
1731
1732 if (v->data == NULL) {
1733 return NGX_ERROR;
1734 }
1735
1736 v->len = ngx_sprintf(v->data, "%uz", ctx->internal_body_length) - v->data;
1737
1738 return NGX_OK;
1739 }
1740
1741
1742 static ngx_int_t
1743 ngx_http_proxy_rewrite_redirect(ngx_http_request_t *r, ngx_table_elt_t *h,
1744 size_t prefix)
1745 {
1746 ngx_int_t rc;
1747 ngx_uint_t i;
1748 ngx_http_proxy_loc_conf_t *plcf;
1749 ngx_http_proxy_redirect_t *pr;
1750
1751 plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
1752
1753 pr = plcf->redirects->elts;
1754
1755 if (pr == NULL) {
1756 return NGX_DECLINED;
1757 }
1758
1759 for (i = 0; i < plcf->redirects->nelts; i++) {
1760 rc = pr[i].handler(r, h, prefix, &pr[i]);
1761
1762 if (rc != NGX_DECLINED) {
1763 return rc;
1764 }
1765 }
1766
1767 return NGX_DECLINED;
1768 }
1769
1770
1771 static ngx_int_t
1772 ngx_http_proxy_rewrite_redirect_text(ngx_http_request_t *r, ngx_table_elt_t *h,
1773 size_t prefix, ngx_http_proxy_redirect_t *pr)
1774 {
1775 size_t len;
1776 u_char *data, *p;
1777
1778 if (pr->redirect.len > h->value.len - prefix
1779 || ngx_rstrncmp(h->value.data + prefix, pr->redirect.data,
1780 pr->redirect.len) != 0)
1781 {
1782 return NGX_DECLINED;
1783 }
1784
1785 len = prefix + pr->replacement.text.len + h->value.len - pr->redirect.len;
1786
1787 data = ngx_pnalloc(r->pool, len);
1788 if (data == NULL) {
1789 return NGX_ERROR;
1790 }
1791
1792 p = data;
1793
1794 p = ngx_copy(p, h->value.data, prefix);
1795
1796 if (pr->replacement.text.len) {
1797 p = ngx_copy(p, pr->replacement.text.data, pr->replacement.text.len);
1798 }
1799
1800 ngx_memcpy(p, h->value.data + prefix + pr->redirect.len,
1801 h->value.len - pr->redirect.len - prefix);
1802
1803 h->value.len = len;
1804 h->value.data = data;
1805
1806 return NGX_OK;
1807 }
1808
1809
1810 static ngx_int_t
1811 ngx_http_proxy_rewrite_redirect_vars(ngx_http_request_t *r, ngx_table_elt_t *h,
1812 size_t prefix, ngx_http_proxy_redirect_t *pr)
1813 {
1814 size_t len;
1815 u_char *data, *p;
1816 ngx_http_script_code_pt code;
1817 ngx_http_script_engine_t e;
1818 ngx_http_script_len_code_pt lcode;
1819
1820 if (pr->redirect.len > h->value.len - prefix
1821 || ngx_rstrncmp(h->value.data + prefix, pr->redirect.data,
1822 pr->redirect.len) != 0)
1823 {
1824 return NGX_DECLINED;
1825 }
1826
1827 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
1828
1829 e.ip = pr->replacement.vars.lengths;
1830 e.request = r;
1831
1832 len = prefix + h->value.len - pr->redirect.len;
1833
1834 while (*(uintptr_t *) e.ip) {
1835 lcode = *(ngx_http_script_len_code_pt *) e.ip;
1836 len += lcode(&e);
1837 }
1838
1839 data = ngx_pnalloc(r->pool, len);
1840 if (data == NULL) {
1841 return NGX_ERROR;
1842 }
1843
1844 p = data;
1845
1846 p = ngx_copy(p, h->value.data, prefix);
1847
1848 e.ip = pr->replacement.vars.values;
1849 e.pos = p;
1850
1851 while (*(uintptr_t *) e.ip) {
1852 code = *(ngx_http_script_code_pt *) e.ip;
1853 code(&e);
1854 }
1855
1856 ngx_memcpy(e.pos, h->value.data + prefix + pr->redirect.len,
1857 h->value.len - pr->redirect.len - prefix);
1858
1859 h->value.len = len;
1860 h->value.data = data;
1861
1862 return NGX_OK;
1863 }
1864
1865
1866 static ngx_int_t
1867 ngx_http_proxy_add_variables(ngx_conf_t *cf)
1868 {
1869 ngx_http_variable_t *var, *v;
1870
1871 for (v = ngx_http_proxy_vars; v->name.len; v++) {
1872 var = ngx_http_add_variable(cf, &v->name, v->flags);
1873 if (var == NULL) {
1874 return NGX_ERROR;
1875 }
1876
1877 var->get_handler = v->get_handler;
1878 var->data = v->data;
1879 }
1880
1881 return NGX_OK;
1882 }
1883
1884
1885 static void *
1886 ngx_http_proxy_create_loc_conf(ngx_conf_t *cf)
1887 {
1888 ngx_http_proxy_loc_conf_t *conf;
1889
1890 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_proxy_loc_conf_t));
1891 if (conf == NULL) {
1892 return NULL;
1893 }
1894
1895 /*
1896 * set by ngx_pcalloc():
1897 *
1898 * conf->upstream.bufs.num = 0;
1899 * conf->upstream.ignore_headers = 0;
1900 * conf->upstream.next_upstream = 0;
1901 * conf->upstream.cache_use_stale = 0;
1902 * conf->upstream.cache_methods = 0;
1903 * conf->upstream.temp_path = NULL;
1904 * conf->upstream.hide_headers_hash = { NULL, 0 };
1905 * conf->upstream.uri = { 0, NULL };
1906 * conf->upstream.location = NULL;
1907 * conf->upstream.store_lengths = NULL;
1908 * conf->upstream.store_values = NULL;
1909 *
1910 * conf->method = NULL;
1911 * conf->headers_source = NULL;
1912 * conf->headers_set_len = NULL;
1913 * conf->headers_set = NULL;
1914 * conf->headers_set_hash = NULL;
1915 * conf->body_set_len = NULL;
1916 * conf->body_set = NULL;
1917 * conf->body_source = { 0, NULL };
1918 * conf->redirects = NULL;
1919 */
1920
1921 conf->upstream.store = NGX_CONF_UNSET;
1922 conf->upstream.store_access = NGX_CONF_UNSET_UINT;
1923 conf->upstream.buffering = NGX_CONF_UNSET;
1924 conf->upstream.ignore_client_abort = NGX_CONF_UNSET;
1925
1926 conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
1927 conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
1928 conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
1929
1930 conf->upstream.send_lowat = NGX_CONF_UNSET_SIZE;
1931 conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE;
1932
1933 conf->upstream.busy_buffers_size_conf = NGX_CONF_UNSET_SIZE;
1934 conf->upstream.max_temp_file_size_conf = NGX_CONF_UNSET_SIZE;
1935 conf->upstream.temp_file_write_size_conf = NGX_CONF_UNSET_SIZE;
1936
1937 conf->upstream.pass_request_headers = NGX_CONF_UNSET;
1938 conf->upstream.pass_request_body = NGX_CONF_UNSET;
1939
1940 #if (NGX_HTTP_CACHE)
1941 conf->upstream.cache = NGX_CONF_UNSET_PTR;
1942 conf->upstream.cache_min_uses = NGX_CONF_UNSET_UINT;
1943 conf->upstream.cache_valid = NGX_CONF_UNSET_PTR;
1944 #endif
1945
1946 conf->upstream.hide_headers = NGX_CONF_UNSET_PTR;
1947 conf->upstream.pass_headers = NGX_CONF_UNSET_PTR;
1948
1949 conf->upstream.intercept_errors = NGX_CONF_UNSET;
1950 #if (NGX_HTTP_SSL)
1951 conf->upstream.ssl_session_reuse = NGX_CONF_UNSET;
1952 #endif
1953
1954 /* "proxy_cyclic_temp_file" is disabled */
1955 conf->upstream.cyclic_temp_file = 0;
1956
1957 conf->redirect = NGX_CONF_UNSET;
1958 conf->upstream.change_buffering = 1;
1959
1960 conf->headers_hash_max_size = NGX_CONF_UNSET_UINT;
1961 conf->headers_hash_bucket_size = NGX_CONF_UNSET_UINT;
1962
1963 return conf;
1964 }
1965
1966
1967 static char *
1968 ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
1969 {
1970 ngx_http_proxy_loc_conf_t *prev = parent;
1971 ngx_http_proxy_loc_conf_t *conf = child;
1972
1973 size_t size;
1974 ngx_str_t *h;
1975 ngx_keyval_t *s;
1976 ngx_hash_init_t hash;
1977 ngx_http_proxy_redirect_t *pr;
1978 ngx_http_script_compile_t sc;
1979
1980 if (conf->upstream.store != 0) {
1981 ngx_conf_merge_value(conf->upstream.store,
1982 prev->upstream.store, 0);
1983
1984 if (conf->upstream.store_lengths == NULL) {
1985 conf->upstream.store_lengths = prev->upstream.store_lengths;
1986 conf->upstream.store_values = prev->upstream.store_values;
1987 }
1988 }
1989
1990 ngx_conf_merge_uint_value(conf->upstream.store_access,
1991 prev->upstream.store_access, 0600);
1992
1993 ngx_conf_merge_value(conf->upstream.buffering,
1994 prev->upstream.buffering, 1);
1995
1996 ngx_conf_merge_value(conf->upstream.ignore_client_abort,
1997 prev->upstream.ignore_client_abort, 0);
1998
1999 ngx_conf_merge_msec_value(conf->upstream.connect_timeout,
2000 prev->upstream.connect_timeout, 60000);
2001
2002 ngx_conf_merge_msec_value(conf->upstream.send_timeout,
2003 prev->upstream.send_timeout, 60000);
2004
2005 ngx_conf_merge_msec_value(conf->upstream.read_timeout,
2006 prev->upstream.read_timeout, 60000);
2007
2008 ngx_conf_merge_size_value(conf->upstream.send_lowat,
2009 prev->upstream.send_lowat, 0);
2010
2011 ngx_conf_merge_size_value(conf->upstream.buffer_size,
2012 prev->upstream.buffer_size,
2013 (size_t) ngx_pagesize);
2014
2015 ngx_conf_merge_bufs_value(conf->upstream.bufs, prev->upstream.bufs,
2016 8, ngx_pagesize);
2017
2018 if (conf->upstream.bufs.num < 2) {
2019 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2020 "there must be at least 2 \"proxy_buffers\"");
2021 return NGX_CONF_ERROR;
2022 }
2023
2024
2025 size = conf->upstream.buffer_size;
2026 if (size < conf->upstream.bufs.size) {
2027 size = conf->upstream.bufs.size;
2028 }
2029
2030
2031 ngx_conf_merge_size_value(conf->upstream.busy_buffers_size_conf,
2032 prev->upstream.busy_buffers_size_conf,
2033 NGX_CONF_UNSET_SIZE);
2034
2035 if (conf->upstream.busy_buffers_size_conf == NGX_CONF_UNSET_SIZE) {
2036 conf->upstream.busy_buffers_size = 2 * size;
2037 } else {
2038 conf->upstream.busy_buffers_size =
2039 conf->upstream.busy_buffers_size_conf;
2040 }
2041
2042 if (conf->upstream.busy_buffers_size < size) {
2043 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2044 "\"proxy_busy_buffers_size\" must be equal or bigger than "
2045 "maximum of the value of \"proxy_buffer_size\" and "
2046 "one of the \"proxy_buffers\"");
2047
2048 return NGX_CONF_ERROR;
2049 }
2050
2051 if (conf->upstream.busy_buffers_size
2052 > (conf->upstream.bufs.num - 1) * conf->upstream.bufs.size)
2053 {
2054 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2055 "\"proxy_busy_buffers_size\" must be less than "
2056 "the size of all \"proxy_buffers\" minus one buffer");
2057
2058 return NGX_CONF_ERROR;
2059 }
2060
2061
2062 ngx_conf_merge_size_value(conf->upstream.temp_file_write_size_conf,
2063 prev->upstream.temp_file_write_size_conf,
2064 NGX_CONF_UNSET_SIZE);
2065
2066 if (conf->upstream.temp_file_write_size_conf == NGX_CONF_UNSET_SIZE) {
2067 conf->upstream.temp_file_write_size = 2 * size;
2068 } else {
2069 conf->upstream.temp_file_write_size =
2070 conf->upstream.temp_file_write_size_conf;
2071 }
2072
2073 if (conf->upstream.temp_file_write_size < size) {
2074 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2075 "\"proxy_temp_file_write_size\" must be equal or bigger than "
2076 "maximum of the value of \"proxy_buffer_size\" and "
2077 "one of the \"proxy_buffers\"");
2078
2079 return NGX_CONF_ERROR;
2080 }
2081
2082 ngx_conf_merge_size_value(conf->upstream.max_temp_file_size_conf,
2083 prev->upstream.max_temp_file_size_conf,
2084 NGX_CONF_UNSET_SIZE);
2085
2086 if (conf->upstream.max_temp_file_size_conf == NGX_CONF_UNSET_SIZE) {
2087 conf->upstream.max_temp_file_size = 1024 * 1024 * 1024;
2088 } else {
2089 conf->upstream.max_temp_file_size =
2090 conf->upstream.max_temp_file_size_conf;
2091 }
2092
2093 if (conf->upstream.max_temp_file_size != 0
2094 && conf->upstream.max_temp_file_size < size)
2095 {
2096 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2097 "\"proxy_max_temp_file_size\" must be equal to zero to disable "
2098 "the temporary files usage or must be equal or bigger than "
2099 "maximum of the value of \"proxy_buffer_size\" and "
2100 "one of the \"proxy_buffers\"");
2101
2102 return NGX_CONF_ERROR;
2103 }
2104
2105
2106 ngx_conf_merge_bitmask_value(conf->upstream.ignore_headers,
2107 prev->upstream.ignore_headers,
2108 NGX_CONF_BITMASK_SET);
2109
2110
2111 ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
2112 prev->upstream.next_upstream,
2113 (NGX_CONF_BITMASK_SET
2114 |NGX_HTTP_UPSTREAM_FT_ERROR
2115 |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
2116
2117 if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
2118 conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
2119 |NGX_HTTP_UPSTREAM_FT_OFF;
2120 }
2121
2122 if (ngx_conf_merge_path_value(cf, &conf->upstream.temp_path,
2123 prev->upstream.temp_path,
2124 &ngx_http_proxy_temp_path)
2125 != NGX_OK)
2126 {
2127 return NGX_CONF_ERROR;
2128 }
2129
2130
2131 #if (NGX_HTTP_CACHE)
2132
2133 ngx_conf_merge_ptr_value(conf->upstream.cache,
2134 prev->upstream.cache, NULL);
2135
2136 if (conf->upstream.cache && conf->upstream.cache->data == NULL) {
2137 ngx_shm_zone_t *shm_zone;
2138
2139 shm_zone = conf->upstream.cache;
2140
2141 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2142 "\"proxy_cache\" zone \"%V\" is unknown",
2143 &shm_zone->shm.name);
2144
2145 return NGX_CONF_ERROR;
2146 }
2147
2148 ngx_conf_merge_uint_value(conf->upstream.cache_min_uses,
2149 prev->upstream.cache_min_uses, 1);
2150
2151 ngx_conf_merge_bitmask_value(conf->upstream.cache_use_stale,
2152 prev->upstream.cache_use_stale,
2153 (NGX_CONF_BITMASK_SET
2154 |NGX_HTTP_UPSTREAM_FT_OFF));
2155
2156 if (conf->upstream.cache_methods == 0) {
2157 conf->upstream.cache_methods = prev->upstream.cache_methods;
2158 }
2159
2160 conf->upstream.cache_methods |= NGX_HTTP_GET|NGX_HTTP_HEAD;
2161
2162 if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_OFF) {
2163 conf->upstream.cache_use_stale = NGX_CONF_BITMASK_SET
2164 |NGX_HTTP_UPSTREAM_FT_OFF;
2165 }
2166
2167 ngx_conf_merge_ptr_value(conf->upstream.cache_valid,
2168 prev->upstream.cache_valid, NULL);
2169
2170 if (conf->cache_key.value.data == NULL) {
2171 conf->cache_key = prev->cache_key;
2172 }
2173
2174 #endif
2175
2176 if (conf->method.len == 0) {
2177 conf->method = prev->method;
2178
2179 } else {
2180 conf->method.data[conf->method.len] = ' ';
2181 conf->method.len++;
2182 }
2183
2184 ngx_conf_merge_value(conf->upstream.pass_request_headers,
2185 prev->upstream.pass_request_headers, 1);
2186 ngx_conf_merge_value(conf->upstream.pass_request_body,
2187 prev->upstream.pass_request_body, 1);
2188
2189 ngx_conf_merge_value(conf->upstream.intercept_errors,
2190 prev->upstream.intercept_errors, 0);
2191
2192 #if (NGX_HTTP_SSL)
2193 ngx_conf_merge_value(conf->upstream.ssl_session_reuse,
2194 prev->upstream.ssl_session_reuse, 1);
2195 #endif
2196
2197 ngx_conf_merge_value(conf->redirect, prev->redirect, 1);
2198
2199 if (conf->redirect) {
2200
2201 if (conf->redirects == NULL) {
2202 conf->redirects = prev->redirects;
2203 }
2204
2205 if (conf->redirects == NULL && conf->url.data) {
2206
2207 conf->redirects = ngx_array_create(cf->pool, 1,
2208 sizeof(ngx_http_proxy_redirect_t));
2209 if (conf->redirects == NULL) {
2210 return NGX_CONF_ERROR;
2211 }
2212
2213 pr = ngx_array_push(conf->redirects);
2214 if (pr == NULL) {
2215 return NGX_CONF_ERROR;
2216 }
2217
2218 pr->handler = ngx_http_proxy_rewrite_redirect_text;
2219 pr->redirect = conf->url;
2220
2221 if (conf->vars.uri.len) {
2222 pr->replacement.text = conf->location;
2223
2224 } else {
2225 pr->replacement.text.len = 0;
2226 pr->replacement.text.data = NULL;
2227 }
2228 }
2229 }
2230
2231 /* STUB */
2232 if (prev->proxy_lengths) {
2233 conf->proxy_lengths = prev->proxy_lengths;
2234 conf->proxy_values = prev->proxy_values;
2235 }
2236
2237 #if (NGX_HTTP_SSL)
2238 if (conf->upstream.ssl == NULL) {
2239 conf->upstream.ssl = prev->upstream.ssl;
2240 }
2241 #endif
2242
2243 ngx_conf_merge_uint_value(conf->headers_hash_max_size,
2244 prev->headers_hash_max_size, 512);
2245
2246 ngx_conf_merge_uint_value(conf->headers_hash_bucket_size,
2247 prev->headers_hash_bucket_size, 64);
2248
2249 conf->headers_hash_bucket_size = ngx_align(conf->headers_hash_bucket_size,
2250 ngx_cacheline_size);
2251
2252 hash.max_size = conf->headers_hash_max_size;
2253 hash.bucket_size = conf->headers_hash_bucket_size;
2254 hash.name = "proxy_headers_hash";
2255
2256 #if (NGX_HTTP_CACHE)
2257
2258 h = conf->upstream.cache ? ngx_http_proxy_hide_cache_headers:
2259 ngx_http_proxy_hide_headers;
2260 #else
2261
2262 h = ngx_http_proxy_hide_headers;
2263
2264 #endif
2265
2266 if (ngx_http_upstream_hide_headers_hash(cf, &conf->upstream,
2267 &prev->upstream, h, &hash)
2268 != NGX_OK)
2269 {
2270 return NGX_CONF_ERROR;
2271 }
2272
2273 if (conf->upstream.upstream == NULL) {
2274 conf->upstream.upstream = prev->upstream.upstream;
2275 conf->vars = prev->vars;
2276 }
2277
2278
2279 if (conf->body_source.data == NULL) {
2280 conf->body_source = prev->body_source;
2281 conf->body_set_len = prev->body_set_len;
2282 conf->body_set = prev->body_set;
2283 }
2284
2285 if (conf->body_source.data && conf->body_set_len == NULL) {
2286
2287 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2288
2289 sc.cf = cf;
2290 sc.source = &conf->body_source;
2291 sc.flushes = &conf->flushes;
2292 sc.lengths = &conf->body_set_len;
2293 sc.values = &conf->body_set;
2294 sc.complete_lengths = 1;
2295 sc.complete_values = 1;
2296
2297 if (ngx_http_script_compile(&sc) != NGX_OK) {
2298 return NGX_CONF_ERROR;
2299 }
2300
2301 if (conf->headers_source == NULL) {
2302 conf->headers_source = ngx_array_create(cf->pool, 4,
2303 sizeof(ngx_keyval_t));
2304 if (conf->headers_source == NULL) {
2305 return NGX_CONF_ERROR;
2306 }
2307 }
2308
2309 s = ngx_array_push(conf->headers_source);
2310 if (s == NULL) {
2311 return NGX_CONF_ERROR;
2312 }
2313
2314 s->key.len = sizeof("Content-Length") - 1;
2315 s->key.data = (u_char *) "Content-Length";
2316 s->value.len = sizeof("$proxy_internal_body_length") - 1;
2317 s->value.data = (u_char *) "$proxy_internal_body_length";
2318 }
2319
2320 if (ngx_http_proxy_merge_headers(cf, conf, prev) != NGX_OK) {
2321 return NGX_CONF_ERROR;
2322 }
2323
2324 return NGX_CONF_OK;
2325 }
2326
2327
2328 static ngx_int_t
2329 ngx_http_proxy_merge_headers(ngx_conf_t *cf, ngx_http_proxy_loc_conf_t *conf,
2330 ngx_http_proxy_loc_conf_t *prev)
2331 {
2332 u_char *p;
2333 size_t size;
2334 uintptr_t *code;
2335 ngx_uint_t i;
2336 ngx_keyval_t *src, *s, *h;
2337 ngx_hash_key_t *hk;
2338 ngx_hash_init_t hash;
2339 ngx_http_script_compile_t sc;
2340 ngx_http_script_copy_code_t *copy;
2341
2342 if (conf->headers_source == NULL) {
2343 conf->flushes = prev->flushes;
2344 conf->headers_set_len = prev->headers_set_len;
2345 conf->headers_set = prev->headers_set;
2346 conf->headers_set_hash = prev->headers_set_hash;
2347 conf->headers_source = prev->headers_source;
2348 }
2349
2350 if (conf->headers_set_hash.buckets
2351 #if (NGX_HTTP_CACHE)
2352 && ((conf->upstream.cache == NULL) == (prev->upstream.cache == NULL))
2353 #endif
2354 )
2355 {
2356 return NGX_OK;
2357 }
2358
2359
2360 conf->headers_names = ngx_array_create(cf->pool, 4, sizeof(ngx_hash_key_t));
2361 if (conf->headers_names == NULL) {
2362 return NGX_ERROR;
2363 }
2364
2365 if (conf->headers_source == NULL) {
2366 conf->headers_source = ngx_array_create(cf->pool, 4,
2367 sizeof(ngx_keyval_t));
2368 if (conf->headers_source == NULL) {
2369 return NGX_ERROR;
2370 }
2371 }
2372
2373 conf->headers_set_len = ngx_array_create(cf->pool, 64, 1);
2374 if (conf->headers_set_len == NULL) {
2375 return NGX_ERROR;
2376 }
2377
2378 conf->headers_set = ngx_array_create(cf->pool, 512, 1);
2379 if (conf->headers_set == NULL) {
2380 return NGX_ERROR;
2381 }
2382
2383
2384 src = conf->headers_source->elts;
2385
2386 #if (NGX_HTTP_CACHE)
2387
2388 h = conf->upstream.cache ? ngx_http_proxy_cache_headers:
2389 ngx_http_proxy_headers;
2390 #else
2391
2392 h = ngx_http_proxy_headers;
2393
2394 #endif
2395
2396 while (h->key.len) {
2397
2398 for (i = 0; i < conf->headers_source->nelts; i++) {
2399 if (ngx_strcasecmp(h->key.data, src[i].key.data) == 0) {
2400 goto next;
2401 }
2402 }
2403
2404 s = ngx_array_push(conf->headers_source);
2405 if (s == NULL) {
2406 return NGX_ERROR;
2407 }
2408
2409 *s = *h;
2410
2411 src = conf->headers_source->elts;
2412
2413 next:
2414
2415 h++;
2416 }
2417
2418
2419 src = conf->headers_source->elts;
2420 for (i = 0; i < conf->headers_source->nelts; i++) {
2421
2422 hk = ngx_array_push(conf->headers_names);
2423 if (hk == NULL) {
2424 return NGX_ERROR;
2425 }
2426
2427 hk->key = src[i].key;
2428 hk->key_hash = ngx_hash_key_lc(src[i].key.data, src[i].key.len);
2429 hk->value = (void *) 1;
2430
2431 if (src[i].value.len == 0) {
2432 continue;
2433 }
2434
2435 if (ngx_http_script_variables_count(&src[i].value) == 0) {
2436 copy = ngx_array_push_n(conf->headers_set_len,
2437 sizeof(ngx_http_script_copy_code_t));
2438 if (copy == NULL) {
2439 return NGX_ERROR;
2440 }
2441
2442 copy->code = (ngx_http_script_code_pt)
2443 ngx_http_script_copy_len_code;
2444 copy->len = src[i].key.len + sizeof(": ") - 1
2445 + src[i].value.len + sizeof(CRLF) - 1;
2446
2447
2448 size = (sizeof(ngx_http_script_copy_code_t)
2449 + src[i].key.len + sizeof(": ") - 1
2450 + src[i].value.len + sizeof(CRLF) - 1
2451 + sizeof(uintptr_t) - 1)
2452 & ~(sizeof(uintptr_t) - 1);
2453
2454 copy = ngx_array_push_n(conf->headers_set, size);
2455 if (copy == NULL) {
2456 return NGX_ERROR;
2457 }
2458
2459 copy->code = ngx_http_script_copy_code;
2460 copy->len = src[i].key.len + sizeof(": ") - 1
2461 + src[i].value.len + sizeof(CRLF) - 1;
2462
2463 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
2464
2465 p = ngx_cpymem(p, src[i].key.data, src[i].key.len);
2466 *p++ = ':'; *p++ = ' ';
2467 p = ngx_cpymem(p, src[i].value.data, src[i].value.len);
2468 *p++ = CR; *p = LF;
2469
2470 } else {
2471 copy = ngx_array_push_n(conf->headers_set_len,
2472 sizeof(ngx_http_script_copy_code_t));
2473 if (copy == NULL) {
2474 return NGX_ERROR;
2475 }
2476
2477 copy->code = (ngx_http_script_code_pt)
2478 ngx_http_script_copy_len_code;
2479 copy->len = src[i].key.len + sizeof(": ") - 1;
2480
2481
2482 size = (sizeof(ngx_http_script_copy_code_t)
2483 + src[i].key.len + sizeof(": ") - 1 + sizeof(uintptr_t) - 1)
2484 & ~(sizeof(uintptr_t) - 1);
2485
2486 copy = ngx_array_push_n(conf->headers_set, size);
2487 if (copy == NULL) {
2488 return NGX_ERROR;
2489 }
2490
2491 copy->code = ngx_http_script_copy_code;
2492 copy->len = src[i].key.len + sizeof(": ") - 1;
2493
2494 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
2495 p = ngx_cpymem(p, src[i].key.data, src[i].key.len);
2496 *p++ = ':'; *p = ' ';
2497
2498
2499 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2500
2501 sc.cf = cf;
2502 sc.source = &src[i].value;
2503 sc.flushes = &conf->flushes;
2504 sc.lengths = &conf->headers_set_len;
2505 sc.values = &conf->headers_set;
2506
2507 if (ngx_http_script_compile(&sc) != NGX_OK) {
2508 return NGX_ERROR;
2509 }
2510
2511
2512 copy = ngx_array_push_n(conf->headers_set_len,
2513 sizeof(ngx_http_script_copy_code_t));
2514 if (copy == NULL) {
2515 return NGX_ERROR;
2516 }
2517
2518 copy->code = (ngx_http_script_code_pt)
2519 ngx_http_script_copy_len_code;
2520 copy->len = sizeof(CRLF) - 1;
2521
2522
2523 size = (sizeof(ngx_http_script_copy_code_t)
2524 + sizeof(CRLF) - 1 + sizeof(uintptr_t) - 1)
2525 & ~(sizeof(uintptr_t) - 1);
2526
2527 copy = ngx_array_push_n(conf->headers_set, size);
2528 if (copy == NULL) {
2529 return NGX_ERROR;
2530 }
2531
2532 copy->code = ngx_http_script_copy_code;
2533 copy->len = sizeof(CRLF) - 1;
2534
2535 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
2536 *p++ = CR; *p = LF;
2537 }
2538
2539 code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t));
2540 if (code == NULL) {
2541 return NGX_ERROR;
2542 }
2543
2544 *code = (uintptr_t) NULL;
2545
2546 code = ngx_array_push_n(conf->headers_set, sizeof(uintptr_t));
2547 if (code == NULL) {
2548 return NGX_ERROR;
2549 }
2550
2551 *code = (uintptr_t) NULL;
2552 }
2553
2554 code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t));
2555 if (code == NULL) {
2556 return NGX_ERROR;
2557 }
2558
2559 *code = (uintptr_t) NULL;
2560
2561
2562 hash.hash = &conf->headers_set_hash;
2563 hash.key = ngx_hash_key_lc;
2564 hash.max_size = conf->headers_hash_max_size;
2565 hash.bucket_size = conf->headers_hash_bucket_size;
2566 hash.name = "proxy_headers_hash";
2567 hash.pool = cf->pool;
2568 hash.temp_pool = NULL;
2569
2570 if (ngx_hash_init(&hash, conf->headers_names->elts,
2571 conf->headers_names->nelts)
2572 != NGX_OK)
2573 {
2574 return NGX_ERROR;
2575 }
2576
2577 return NGX_OK;
2578 }
2579
2580
2581 static char *
2582 ngx_http_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2583 {
2584 ngx_http_proxy_loc_conf_t *plcf = conf;
2585
2586 size_t add;
2587 u_short port;
2588 ngx_str_t *value, *url;
2589 ngx_url_t u;
2590 ngx_uint_t n;
2591 ngx_http_core_loc_conf_t *clcf;
2592 ngx_http_script_compile_t sc;
2593
2594 if (plcf->upstream.upstream || plcf->proxy_lengths) {
2595 return "is duplicate";
2596 }
2597
2598 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
2599
2600 clcf->handler = ngx_http_proxy_handler;
2601
2602 if (clcf->name.data[clcf->name.len - 1] == '/') {
2603 clcf->auto_redirect = 1;
2604 }
2605
2606 value = cf->args->elts;
2607
2608 url = &value[1];
2609
2610 n = ngx_http_script_variables_count(url);
2611
2612 if (n) {
2613
2614 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2615
2616 sc.cf = cf;
2617 sc.source = url;
2618 sc.lengths = &plcf->proxy_lengths;
2619 sc.values = &plcf->proxy_values;
2620 sc.variables = n;
2621 sc.complete_lengths = 1;
2622 sc.complete_values = 1;
2623
2624 if (ngx_http_script_compile(&sc) != NGX_OK) {
2625 return NGX_CONF_ERROR;
2626 }
2627
2628 #if (NGX_HTTP_SSL)
2629 if (ngx_http_proxy_set_ssl(cf, plcf) != NGX_OK) {
2630 return NGX_CONF_ERROR;
2631 }
2632 #endif
2633
2634 return NGX_CONF_OK;
2635 }
2636
2637 if (ngx_strncasecmp(url->data, (u_char *) "http://", 7) == 0) {
2638 add = 7;
2639 port = 80;
2640
2641 } else if (ngx_strncasecmp(url->data, (u_char *) "https://", 8) == 0) {
2642
2643 #if (NGX_HTTP_SSL)
2644 if (ngx_http_proxy_set_ssl(cf, plcf) != NGX_OK) {
2645 return NGX_CONF_ERROR;
2646 }
2647
2648 add = 8;
2649 port = 443;
2650 #else
2651 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2652 "https protocol requires SSL support");
2653 return NGX_CONF_ERROR;
2654 #endif
2655
2656 } else {
2657 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid URL prefix");
2658 return NGX_CONF_ERROR;
2659 }
2660
2661 ngx_memzero(&u, sizeof(ngx_url_t));
2662
2663 u.url.len = url->len - add;
2664 u.url.data = url->data + add;
2665 u.default_port = port;
2666 u.uri_part = 1;
2667 u.no_resolve = 1;
2668
2669 plcf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0);
2670 if (plcf->upstream.upstream == NULL) {
2671 return NGX_CONF_ERROR;
2672 }
2673
2674 plcf->vars.schema.len = add;
2675 plcf->vars.schema.data = url->data;
2676 plcf->vars.key_start = plcf->vars.schema;
2677
2678 ngx_http_proxy_set_vars(&u, &plcf->vars);
2679
2680 plcf->location = clcf->name;
2681
2682 if (clcf->named
2683 #if (NGX_PCRE)
2684 || clcf->regex
2685 #endif
2686 || clcf->noname)
2687 {
2688 if (plcf->vars.uri.len) {
2689 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2690 "\"proxy_pass\" may not have URI part in "
2691 "location given by regular expression, "
2692 "or inside named location, "
2693 "or inside the \"if\" statement, "
2694 "or inside the \"limit_except\" block");
2695 return NGX_CONF_ERROR;
2696 }
2697
2698 plcf->location.len = 0;
2699 }
2700
2701 plcf->url = *url;
2702
2703 return NGX_CONF_OK;
2704 }
2705
2706
2707 static char *
2708 ngx_http_proxy_redirect(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2709 {
2710 ngx_http_proxy_loc_conf_t *plcf = conf;
2711
2712 ngx_str_t *value;
2713 ngx_array_t *vars_lengths, *vars_values;
2714 ngx_http_script_compile_t sc;
2715 ngx_http_proxy_redirect_t *pr;
2716
2717 if (plcf->redirect == 0) {
2718 return NGX_CONF_OK;
2719 }
2720
2721 value = cf->args->elts;
2722
2723 if (cf->args->nelts == 2) {
2724 if (ngx_strcmp(value[1].data, "off") == 0) {
2725 plcf->redirect = 0;
2726 plcf->redirects = NULL;
2727 return NGX_CONF_OK;
2728 }
2729
2730 if (ngx_strcmp(value[1].data, "false") == 0) {
2731 ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
2732 "invalid parameter \"false\", use \"off\" instead");
2733 plcf->redirect = 0;
2734 plcf->redirects = NULL;
2735 return NGX_CONF_OK;
2736 }
2737
2738 if (ngx_strcmp(value[1].data, "default") != 0) {
2739 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2740 "invalid parameter \"%V\"", &value[1]);
2741 return NGX_CONF_ERROR;
2742 }
2743 }
2744
2745 if (plcf->redirects == NULL) {
2746 plcf->redirects = ngx_array_create(cf->pool, 1,
2747 sizeof(ngx_http_proxy_redirect_t));
2748 if (plcf->redirects == NULL) {
2749 return NGX_CONF_ERROR;
2750 }
2751 }
2752
2753 pr = ngx_array_push(plcf->redirects);
2754 if (pr == NULL) {
2755 return NGX_CONF_ERROR;
2756 }
2757
2758 if (ngx_strcmp(value[1].data, "default") == 0) {
2759 if (plcf->proxy_lengths) {
2760 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2761 "\"proxy_redirect default\" may not be used "
2762 "with \"proxy_pass\" directive with variables");
2763 return NGX_CONF_ERROR;
2764 }
2765
2766 if (plcf->url.data == NULL) {
2767 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2768 "\"proxy_redirect default\" must go "
2769 "after the \"proxy_pass\" directive");
2770 return NGX_CONF_ERROR;
2771 }
2772
2773 pr->handler = ngx_http_proxy_rewrite_redirect_text;
2774 pr->redirect = plcf->url;
2775
2776 if (plcf->vars.uri.len) {
2777 pr->replacement.text = plcf->location;
2778
2779 } else {
2780 pr->replacement.text.len = 0;
2781 pr->replacement.text.data = NULL;
2782 }
2783
2784 return NGX_CONF_OK;
2785 }
2786
2787 if (ngx_http_script_variables_count(&value[2]) == 0) {
2788 pr->handler = ngx_http_proxy_rewrite_redirect_text;
2789 pr->redirect = value[1];
2790 pr->replacement.text = value[2];
2791
2792 return NGX_CONF_OK;
2793 }
2794
2795 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2796
2797 vars_lengths = NULL;
2798 vars_values = NULL;
2799
2800 sc.cf = cf;
2801 sc.source = &value[2];
2802 sc.lengths = &vars_lengths;
2803 sc.values = &vars_values;
2804 sc.complete_lengths = 1;
2805 sc.complete_values = 1;
2806
2807 if (ngx_http_script_compile(&sc) != NGX_OK) {
2808 return NGX_CONF_ERROR;
2809 }
2810
2811 pr->handler = ngx_http_proxy_rewrite_redirect_vars;
2812 pr->redirect = value[1];
2813 pr->replacement.vars.lengths = vars_lengths->elts;
2814 pr->replacement.vars.values = vars_values->elts;
2815
2816 return NGX_CONF_OK;
2817 }
2818
2819
2820 static char *
2821 ngx_http_proxy_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2822 {
2823 ngx_http_proxy_loc_conf_t *plcf = conf;
2824
2825 ngx_str_t *value;
2826 ngx_http_script_compile_t sc;
2827
2828 if (plcf->upstream.store != NGX_CONF_UNSET
2829 || plcf->upstream.store_lengths)
2830 {
2831 return "is duplicate";
2832 }
2833
2834 value = cf->args->elts;
2835
2836 if (ngx_strcmp(value[1].data, "off") == 0) {
2837 plcf->upstream.store = 0;
2838 return NGX_CONF_OK;
2839 }
2840
2841 #if (NGX_HTTP_CACHE)
2842
2843 if (plcf->upstream.cache != NGX_CONF_UNSET_PTR
2844 && plcf->upstream.cache != NULL)
2845 {
2846 return "is incompatible with \"proxy_cache\"";
2847 }
2848
2849 #endif
2850
2851 if (ngx_strcmp(value[1].data, "on") == 0) {
2852 plcf->upstream.store = 1;
2853 return NGX_CONF_OK;
2854 }
2855
2856 /* include the terminating '\0' into script */
2857 value[1].len++;
2858
2859 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
2860
2861 sc.cf = cf;
2862 sc.source = &value[1];
2863 sc.lengths = &plcf->upstream.store_lengths;
2864 sc.values = &plcf->upstream.store_values;
2865 sc.variables = ngx_http_script_variables_count(&value[1]);
2866 sc.complete_lengths = 1;
2867 sc.complete_values = 1;
2868
2869 if (ngx_http_script_compile(&sc) != NGX_OK) {
2870 return NGX_CONF_ERROR;
2871 }
2872
2873 return NGX_CONF_OK;
2874 }
2875
2876
2877 #if (NGX_HTTP_CACHE)
2878
2879 static char *
2880 ngx_http_proxy_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2881 {
2882 ngx_http_proxy_loc_conf_t *plcf = conf;
2883
2884 ngx_str_t *value;
2885
2886 value = cf->args->elts;
2887
2888 if (plcf->upstream.cache != NGX_CONF_UNSET_PTR) {
2889 return "is duplicate";
2890 }
2891
2892 if (ngx_strcmp(value[1].data, "off") == 0) {
2893 plcf->upstream.cache = NULL;
2894 return NGX_CONF_OK;
2895 }
2896
2897 if (plcf->upstream.store > 0 || plcf->upstream.store_lengths) {
2898 return "is incompatible with \"proxy_store\"";
2899 }
2900
2901 plcf->upstream.cache = ngx_shared_memory_add(cf, &value[1], 0,
2902 &ngx_http_proxy_module);
2903 if (plcf->upstream.cache == NULL) {
2904 return NGX_CONF_ERROR;
2905 }
2906
2907 return NGX_CONF_OK;
2908 }
2909
2910
2911 static char *
2912 ngx_http_proxy_cache_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2913 {
2914 ngx_http_proxy_loc_conf_t *plcf = conf;
2915
2916 ngx_str_t *value;
2917 ngx_http_compile_complex_value_t ccv;
2918
2919 value = cf->args->elts;
2920
2921 if (plcf->cache_key.value.len) {
2922 return "is duplicate";
2923 }
2924
2925 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
2926
2927 ccv.cf = cf;
2928 ccv.value = &value[1];
2929 ccv.complex_value = &plcf->cache_key;
2930
2931 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
2932 return NGX_CONF_ERROR;
2933 }
2934
2935 return NGX_CONF_OK;
2936 }
2937
2938 #endif
2939
2940
2941 static char *
2942 ngx_http_proxy_lowat_check(ngx_conf_t *cf, void *post, void *data)
2943 {
2944 #if (NGX_FREEBSD)
2945 ssize_t *np = data;
2946
2947 if ((u_long) *np >= ngx_freebsd_net_inet_tcp_sendspace) {
2948 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2949 "\"proxy_send_lowat\" must be less than %d "
2950 "(sysctl net.inet.tcp.sendspace)",
2951 ngx_freebsd_net_inet_tcp_sendspace);
2952
2953 return NGX_CONF_ERROR;
2954 }
2955
2956 #elif !(NGX_HAVE_SO_SNDLOWAT)
2957 ssize_t *np = data;
2958
2959 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
2960 "\"proxy_send_lowat\" is not supported, ignored");
2961
2962 *np = 0;
2963
2964 #endif
2965
2966 return NGX_CONF_OK;
2967 }
2968
2969
2970 static char *
2971 ngx_http_proxy_upstream_max_fails_unsupported(ngx_conf_t *cf,
2972 ngx_command_t *cmd, void *conf)
2973 {
2974 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2975 "\"proxy_upstream_max_fails\" is not supported, "
2976 "use the \"max_fails\" parameter of the \"server\" directive ",
2977 "inside the \"upstream\" block");
2978
2979 return NGX_CONF_ERROR;
2980 }
2981
2982
2983 static char *
2984 ngx_http_proxy_upstream_fail_timeout_unsupported(ngx_conf_t *cf,
2985 ngx_command_t *cmd, void *conf)
2986 {
2987 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2988 "\"proxy_upstream_fail_timeout\" is not supported, "
2989 "use the \"fail_timeout\" parameter of the \"server\" directive ",
2990 "inside the \"upstream\" block");
2991
2992 return NGX_CONF_ERROR;
2993 }
2994
2995
2996 #if (NGX_HTTP_SSL)
2997
2998 static ngx_int_t
2999 ngx_http_proxy_set_ssl(ngx_conf_t *cf, ngx_http_proxy_loc_conf_t *plcf)
3000 {
3001 ngx_pool_cleanup_t *cln;
3002
3003 plcf->upstream.ssl = ngx_pcalloc(cf->pool, sizeof(ngx_ssl_t));
3004 if (plcf->upstream.ssl == NULL) {
3005 return NGX_ERROR;
3006 }
3007
3008 plcf->upstream.ssl->log = cf->log;
3009
3010 if (ngx_ssl_create(plcf->upstream.ssl,
3011 NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1, NULL)
3012 != NGX_OK)
3013 {
3014 return NGX_ERROR;
3015 }
3016
3017 cln = ngx_pool_cleanup_add(cf->pool, 0);
3018 if (cln == NULL) {
3019 return NGX_ERROR;
3020 }
3021
3022 cln->handler = ngx_ssl_cleanup_ctx;
3023 cln->data = plcf->upstream.ssl;
3024
3025 return NGX_OK;
3026 }
3027
3028 #endif
3029
3030
3031 static void
3032 ngx_http_proxy_set_vars(ngx_url_t *u, ngx_http_proxy_vars_t *v)
3033 {
3034 if (u->family != AF_UNIX) {
3035
3036 if (u->no_port || u->port == u->default_port) {
3037
3038 v->host_header = u->host;
3039
3040 if (u->default_port == 80) {
3041 v->port.len = sizeof("80") - 1;
3042 v->port.data = (u_char *) "80";
3043
3044 } else {
3045 v->port.len = sizeof("443") - 1;
3046 v->port.data = (u_char *) "443";
3047 }
3048
3049 } else {
3050 v->host_header.len = u->host.len + 1 + u->port_text.len;
3051 v->host_header.data = u->host.data;
3052 v->port = u->port_text;
3053 }
3054
3055 v->key_start.len += v->host_header.len;
3056
3057 } else {
3058 v->host_header.len = sizeof("localhost") - 1;
3059 v->host_header.data = (u_char *) "localhost";
3060 v->port.len = 0;
3061 v->port.data = (u_char *) "";
3062 v->key_start.len += sizeof("unix:") - 1 + u->host.len + 1;
3063 }
3064
3065 v->uri = u->uri;
3066 }
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