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nginx 1.1.11
[nginx.git] / src / http / modules / ngx_http_scgi_module.c
blob41cf23bc648566b59bb1c2316fd86b6ae09bc7b7
1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Manlio Perillo (manlio.perillo@gmail.com)
5 */
6
7
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10 #include <ngx_http.h>
11
12
13 typedef struct {
14 ngx_http_upstream_conf_t upstream;
15
16 ngx_array_t *flushes;
17 ngx_array_t *params_len;
18 ngx_array_t *params;
19 ngx_array_t *params_source;
20
21 ngx_hash_t headers_hash;
22 ngx_uint_t header_params;
23
24 ngx_array_t *scgi_lengths;
25 ngx_array_t *scgi_values;
26
27 #if (NGX_HTTP_CACHE)
28 ngx_http_complex_value_t cache_key;
29 #endif
30 } ngx_http_scgi_loc_conf_t;
31
32
33 static ngx_int_t ngx_http_scgi_eval(ngx_http_request_t *r,
34 ngx_http_scgi_loc_conf_t *scf);
35 static ngx_int_t ngx_http_scgi_create_request(ngx_http_request_t *r);
36 static ngx_int_t ngx_http_scgi_reinit_request(ngx_http_request_t *r);
37 static ngx_int_t ngx_http_scgi_process_status_line(ngx_http_request_t *r);
38 static ngx_int_t ngx_http_scgi_process_header(ngx_http_request_t *r);
39 static ngx_int_t ngx_http_scgi_process_header(ngx_http_request_t *r);
40 static void ngx_http_scgi_abort_request(ngx_http_request_t *r);
41 static void ngx_http_scgi_finalize_request(ngx_http_request_t *r, ngx_int_t rc);
42
43 static void *ngx_http_scgi_create_loc_conf(ngx_conf_t *cf);
44 static char *ngx_http_scgi_merge_loc_conf(ngx_conf_t *cf, void *parent,
45 void *child);
46 static ngx_int_t ngx_http_scgi_merge_params(ngx_conf_t *cf,
47 ngx_http_scgi_loc_conf_t *conf, ngx_http_scgi_loc_conf_t *prev);
48
49 static char *ngx_http_scgi_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
50 static char *ngx_http_scgi_store(ngx_conf_t *cf, ngx_command_t *cmd,
51 void *conf);
52
53 #if (NGX_HTTP_CACHE)
54 static ngx_int_t ngx_http_scgi_create_key(ngx_http_request_t *r);
55 static char *ngx_http_scgi_cache(ngx_conf_t *cf, ngx_command_t *cmd,
56 void *conf);
57 static char *ngx_http_scgi_cache_key(ngx_conf_t *cf, ngx_command_t *cmd,
58 void *conf);
59 #endif
60
61
62 static ngx_conf_bitmask_t ngx_http_scgi_next_upstream_masks[] = {
63 { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR },
64 { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
65 { ngx_string("invalid_header"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
66 { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 },
67 { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
68 { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
69 { ngx_string("updating"), NGX_HTTP_UPSTREAM_FT_UPDATING },
70 { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
71 { ngx_null_string, 0 }
72 };
73
74
75 ngx_module_t ngx_http_scgi_module;
76
77
78 static ngx_command_t ngx_http_scgi_commands[] = {
79
80 { ngx_string("scgi_pass"),
81 NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
82 ngx_http_scgi_pass,
83 NGX_HTTP_LOC_CONF_OFFSET,
84 0,
85 NULL },
86
87 { ngx_string("scgi_store"),
88 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
89 ngx_http_scgi_store,
90 NGX_HTTP_LOC_CONF_OFFSET,
91 0,
92 NULL },
93
94 { ngx_string("scgi_store_access"),
95 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
96 ngx_conf_set_access_slot,
97 NGX_HTTP_LOC_CONF_OFFSET,
98 offsetof(ngx_http_scgi_loc_conf_t, upstream.store_access),
99 NULL },
100
101 { ngx_string("scgi_buffering"),
102 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
103 ngx_conf_set_flag_slot,
104 NGX_HTTP_LOC_CONF_OFFSET,
105 offsetof(ngx_http_scgi_loc_conf_t, upstream.buffering),
106 NULL },
107
108 { ngx_string("scgi_ignore_client_abort"),
109 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
110 ngx_conf_set_flag_slot,
111 NGX_HTTP_LOC_CONF_OFFSET,
112 offsetof(ngx_http_scgi_loc_conf_t, upstream.ignore_client_abort),
113 NULL },
114
115 { ngx_string("scgi_bind"),
116 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
117 ngx_http_upstream_bind_set_slot,
118 NGX_HTTP_LOC_CONF_OFFSET,
119 offsetof(ngx_http_scgi_loc_conf_t, upstream.local),
120 NULL },
121
122 { ngx_string("scgi_connect_timeout"),
123 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
124 ngx_conf_set_msec_slot,
125 NGX_HTTP_LOC_CONF_OFFSET,
126 offsetof(ngx_http_scgi_loc_conf_t, upstream.connect_timeout),
127 NULL },
128
129 { ngx_string("scgi_send_timeout"),
130 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
131 ngx_conf_set_msec_slot,
132 NGX_HTTP_LOC_CONF_OFFSET,
133 offsetof(ngx_http_scgi_loc_conf_t, upstream.send_timeout),
134 NULL },
135
136 { ngx_string("scgi_buffer_size"),
137 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
138 ngx_conf_set_size_slot,
139 NGX_HTTP_LOC_CONF_OFFSET,
140 offsetof(ngx_http_scgi_loc_conf_t, upstream.buffer_size),
141 NULL },
142
143 { ngx_string("scgi_pass_request_headers"),
144 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
145 ngx_conf_set_flag_slot,
146 NGX_HTTP_LOC_CONF_OFFSET,
147 offsetof(ngx_http_scgi_loc_conf_t, upstream.pass_request_headers),
148 NULL },
149
150 { ngx_string("scgi_pass_request_body"),
151 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
152 ngx_conf_set_flag_slot,
153 NGX_HTTP_LOC_CONF_OFFSET,
154 offsetof(ngx_http_scgi_loc_conf_t, upstream.pass_request_body),
155 NULL },
156
157 { ngx_string("scgi_intercept_errors"),
158 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
159 ngx_conf_set_flag_slot,
160 NGX_HTTP_LOC_CONF_OFFSET,
161 offsetof(ngx_http_scgi_loc_conf_t, upstream.intercept_errors),
162 NULL },
163
164 { ngx_string("scgi_read_timeout"),
165 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
166 ngx_conf_set_msec_slot,
167 NGX_HTTP_LOC_CONF_OFFSET,
168 offsetof(ngx_http_scgi_loc_conf_t, upstream.read_timeout),
169 NULL },
170
171 { ngx_string("scgi_buffers"),
172 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
173 ngx_conf_set_bufs_slot,
174 NGX_HTTP_LOC_CONF_OFFSET,
175 offsetof(ngx_http_scgi_loc_conf_t, upstream.bufs),
176 NULL },
177
178 { ngx_string("scgi_busy_buffers_size"),
179 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
180 ngx_conf_set_size_slot,
181 NGX_HTTP_LOC_CONF_OFFSET,
182 offsetof(ngx_http_scgi_loc_conf_t, upstream.busy_buffers_size_conf),
183 NULL },
184
185 #if (NGX_HTTP_CACHE)
186
187 { ngx_string("scgi_cache"),
188 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
189 ngx_http_scgi_cache,
190 NGX_HTTP_LOC_CONF_OFFSET,
191 0,
192 NULL },
193
194 { ngx_string("scgi_cache_key"),
195 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
196 ngx_http_scgi_cache_key,
197 NGX_HTTP_LOC_CONF_OFFSET,
198 0,
199 NULL },
200
201 { ngx_string("scgi_cache_path"),
202 NGX_HTTP_MAIN_CONF|NGX_CONF_2MORE,
203 ngx_http_file_cache_set_slot,
204 0,
205 0,
206 &ngx_http_scgi_module },
207
208 { ngx_string("scgi_cache_bypass"),
209 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
210 ngx_http_set_predicate_slot,
211 NGX_HTTP_LOC_CONF_OFFSET,
212 offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_bypass),
213 NULL },
214
215 { ngx_string("scgi_no_cache"),
216 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
217 ngx_http_set_predicate_slot,
218 NGX_HTTP_LOC_CONF_OFFSET,
219 offsetof(ngx_http_scgi_loc_conf_t, upstream.no_cache),
220 NULL },
221
222 { ngx_string("scgi_cache_valid"),
223 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
224 ngx_http_file_cache_valid_set_slot,
225 NGX_HTTP_LOC_CONF_OFFSET,
226 offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_valid),
227 NULL },
228
229 { ngx_string("scgi_cache_min_uses"),
230 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
231 ngx_conf_set_num_slot,
232 NGX_HTTP_LOC_CONF_OFFSET,
233 offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_min_uses),
234 NULL },
235
236 { ngx_string("scgi_cache_use_stale"),
237 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
238 ngx_conf_set_bitmask_slot,
239 NGX_HTTP_LOC_CONF_OFFSET,
240 offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_use_stale),
241 &ngx_http_scgi_next_upstream_masks },
242
243 { ngx_string("scgi_cache_methods"),
244 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
245 ngx_conf_set_bitmask_slot,
246 NGX_HTTP_LOC_CONF_OFFSET,
247 offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_methods),
248 &ngx_http_upstream_cache_method_mask },
249
250 #endif
251
252 { ngx_string("scgi_temp_path"),
253 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
254 ngx_conf_set_path_slot,
255 NGX_HTTP_LOC_CONF_OFFSET,
256 offsetof(ngx_http_scgi_loc_conf_t, upstream.temp_path),
257 NULL },
258
259 { ngx_string("scgi_max_temp_file_size"),
260 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
261 ngx_conf_set_size_slot,
262 NGX_HTTP_LOC_CONF_OFFSET,
263 offsetof(ngx_http_scgi_loc_conf_t, upstream.max_temp_file_size_conf),
264 NULL },
265
266 { ngx_string("scgi_temp_file_write_size"),
267 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
268 ngx_conf_set_size_slot,
269 NGX_HTTP_LOC_CONF_OFFSET,
270 offsetof(ngx_http_scgi_loc_conf_t, upstream.temp_file_write_size_conf),
271 NULL },
272
273 { ngx_string("scgi_next_upstream"),
274 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
275 ngx_conf_set_bitmask_slot,
276 NGX_HTTP_LOC_CONF_OFFSET,
277 offsetof(ngx_http_scgi_loc_conf_t, upstream.next_upstream),
278 &ngx_http_scgi_next_upstream_masks },
279
280 { ngx_string("scgi_param"),
281 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE23,
282 ngx_http_upstream_param_set_slot,
283 NGX_HTTP_LOC_CONF_OFFSET,
284 offsetof(ngx_http_scgi_loc_conf_t, params_source),
285 NULL },
286
287 { ngx_string("scgi_pass_header"),
288 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
289 ngx_conf_set_str_array_slot,
290 NGX_HTTP_LOC_CONF_OFFSET,
291 offsetof(ngx_http_scgi_loc_conf_t, upstream.pass_headers),
292 NULL },
293
294 { ngx_string("scgi_hide_header"),
295 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
296 ngx_conf_set_str_array_slot,
297 NGX_HTTP_LOC_CONF_OFFSET,
298 offsetof(ngx_http_scgi_loc_conf_t, upstream.hide_headers),
299 NULL },
300
301 { ngx_string("scgi_ignore_headers"),
302 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
303 ngx_conf_set_bitmask_slot,
304 NGX_HTTP_LOC_CONF_OFFSET,
305 offsetof(ngx_http_scgi_loc_conf_t, upstream.ignore_headers),
306 &ngx_http_upstream_ignore_headers_masks },
307
308 ngx_null_command
309 };
310
311
312 static ngx_http_module_t ngx_http_scgi_module_ctx = {
313 NULL, /* preconfiguration */
314 NULL, /* postconfiguration */
315
316 NULL, /* create main configuration */
317 NULL, /* init main configuration */
318
319 NULL, /* create server configuration */
320 NULL, /* merge server configuration */
321
322 ngx_http_scgi_create_loc_conf, /* create location configuration */
323 ngx_http_scgi_merge_loc_conf /* merge location configuration */
324 };
325
326
327 ngx_module_t ngx_http_scgi_module = {
328 NGX_MODULE_V1,
329 &ngx_http_scgi_module_ctx, /* module context */
330 ngx_http_scgi_commands, /* module directives */
331 NGX_HTTP_MODULE, /* module type */
332 NULL, /* init master */
333 NULL, /* init module */
334 NULL, /* init process */
335 NULL, /* init thread */
336 NULL, /* exit thread */
337 NULL, /* exit process */
338 NULL, /* exit master */
339 NGX_MODULE_V1_PADDING
340 };
341
342
343 static ngx_str_t ngx_http_scgi_hide_headers[] = {
344 ngx_string("Status"),
345 ngx_string("X-Accel-Expires"),
346 ngx_string("X-Accel-Redirect"),
347 ngx_string("X-Accel-Limit-Rate"),
348 ngx_string("X-Accel-Buffering"),
349 ngx_string("X-Accel-Charset"),
350 ngx_null_string
351 };
352
353
354 #if (NGX_HTTP_CACHE)
355
356 static ngx_keyval_t ngx_http_scgi_cache_headers[] = {
357 { ngx_string("HTTP_IF_MODIFIED_SINCE"), ngx_string("") },
358 { ngx_string("HTTP_IF_UNMODIFIED_SINCE"), ngx_string("") },
359 { ngx_string("HTTP_IF_NONE_MATCH"), ngx_string("") },
360 { ngx_string("HTTP_IF_MATCH"), ngx_string("") },
361 { ngx_string("HTTP_RANGE"), ngx_string("") },
362 { ngx_string("HTTP_IF_RANGE"), ngx_string("") },
363 { ngx_null_string, ngx_null_string }
364 };
365
366 #endif
367
368
369 static ngx_path_init_t ngx_http_scgi_temp_path = {
370 ngx_string(NGX_HTTP_SCGI_TEMP_PATH), { 1, 2, 0 }
371 };
372
373
374 static ngx_int_t
375 ngx_http_scgi_handler(ngx_http_request_t *r)
376 {
377 ngx_int_t rc;
378 ngx_http_status_t *status;
379 ngx_http_upstream_t *u;
380 ngx_http_scgi_loc_conf_t *scf;
381
382 if (r->subrequest_in_memory) {
383 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
384 "ngx_http_scgi_module does not support "
385 "subrequests in memory");
386 return NGX_HTTP_INTERNAL_SERVER_ERROR;
387 }
388
389 if (ngx_http_upstream_create(r) != NGX_OK) {
390 return NGX_HTTP_INTERNAL_SERVER_ERROR;
391 }
392
393 status = ngx_pcalloc(r->pool, sizeof(ngx_http_status_t));
394 if (status == NULL) {
395 return NGX_HTTP_INTERNAL_SERVER_ERROR;
396 }
397
398 ngx_http_set_ctx(r, status, ngx_http_scgi_module);
399
400 scf = ngx_http_get_module_loc_conf(r, ngx_http_scgi_module);
401
402 if (scf->scgi_lengths) {
403 if (ngx_http_scgi_eval(r, scf) != NGX_OK) {
404 return NGX_HTTP_INTERNAL_SERVER_ERROR;
405 }
406 }
407
408 u = r->upstream;
409
410 ngx_str_set(&u->schema, "scgi://");
411 u->output.tag = (ngx_buf_tag_t) &ngx_http_scgi_module;
412
413 u->conf = &scf->upstream;
414
415 #if (NGX_HTTP_CACHE)
416 u->create_key = ngx_http_scgi_create_key;
417 #endif
418 u->create_request = ngx_http_scgi_create_request;
419 u->reinit_request = ngx_http_scgi_reinit_request;
420 u->process_header = ngx_http_scgi_process_status_line;
421 u->abort_request = ngx_http_scgi_abort_request;
422 u->finalize_request = ngx_http_scgi_finalize_request;
423
424 u->buffering = scf->upstream.buffering;
425
426 u->pipe = ngx_pcalloc(r->pool, sizeof(ngx_event_pipe_t));
427 if (u->pipe == NULL) {
428 return NGX_HTTP_INTERNAL_SERVER_ERROR;
429 }
430
431 u->pipe->input_filter = ngx_event_pipe_copy_input_filter;
432 u->pipe->input_ctx = r;
433
434 rc = ngx_http_read_client_request_body(r, ngx_http_upstream_init);
435
436 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
437 return rc;
438 }
439
440 return NGX_DONE;
441 }
442
443
444 static ngx_int_t
445 ngx_http_scgi_eval(ngx_http_request_t *r, ngx_http_scgi_loc_conf_t * scf)
446 {
447 ngx_url_t url;
448 ngx_http_upstream_t *u;
449
450 ngx_memzero(&url, sizeof(ngx_url_t));
451
452 if (ngx_http_script_run(r, &url.url, scf->scgi_lengths->elts, 0,
453 scf->scgi_values->elts)
454 == NULL)
455 {
456 return NGX_ERROR;
457 }
458
459 url.no_resolve = 1;
460
461 if (ngx_parse_url(r->pool, &url) != NGX_OK) {
462 if (url.err) {
463 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
464 "%s in upstream \"%V\"", url.err, &url.url);
465 }
466
467 return NGX_ERROR;
468 }
469
470 u = r->upstream;
471
472 u->resolved = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_resolved_t));
473 if (u->resolved == NULL) {
474 return NGX_ERROR;
475 }
476
477 if (url.addrs && url.addrs[0].sockaddr) {
478 u->resolved->sockaddr = url.addrs[0].sockaddr;
479 u->resolved->socklen = url.addrs[0].socklen;
480 u->resolved->naddrs = 1;
481 u->resolved->host = url.addrs[0].name;
482
483 } else {
484 u->resolved->host = url.host;
485 u->resolved->port = url.port;
486 u->resolved->no_port = url.no_port;
487 }
488
489 return NGX_OK;
490 }
491
492
493 #if (NGX_HTTP_CACHE)
494
495 static ngx_int_t
496 ngx_http_scgi_create_key(ngx_http_request_t *r)
497 {
498 ngx_str_t *key;
499 ngx_http_scgi_loc_conf_t *scf;
500
501 key = ngx_array_push(&r->cache->keys);
502 if (key == NULL) {
503 return NGX_ERROR;
504 }
505
506 scf = ngx_http_get_module_loc_conf(r, ngx_http_scgi_module);
507
508 if (ngx_http_complex_value(r, &scf->cache_key, key) != NGX_OK) {
509 return NGX_ERROR;
510 }
511
512 return NGX_OK;
513 }
514
515 #endif
516
517
518 static ngx_int_t
519 ngx_http_scgi_create_request(ngx_http_request_t *r)
520 {
521 u_char ch, *key, *val, *lowcase_key;
522 size_t len, key_len, val_len, allocated;
523 ngx_buf_t *b;
524 ngx_str_t *content_length;
525 ngx_uint_t i, n, hash, skip_empty, header_params;
526 ngx_chain_t *cl, *body;
527 ngx_list_part_t *part;
528 ngx_table_elt_t *header, **ignored;
529 ngx_http_script_code_pt code;
530 ngx_http_script_engine_t e, le;
531 ngx_http_scgi_loc_conf_t *scf;
532 ngx_http_script_len_code_pt lcode;
533 static ngx_str_t zero = ngx_string("0");
534
535 content_length = r->headers_in.content_length ?
536 &r->headers_in.content_length->value : &zero;
537
538 len = sizeof("CONTENT_LENGTH") + content_length->len + 1;
539
540 header_params = 0;
541 ignored = NULL;
542
543 scf = ngx_http_get_module_loc_conf(r, ngx_http_scgi_module);
544
545 if (scf->params_len) {
546 ngx_memzero(&le, sizeof(ngx_http_script_engine_t));
547
548 ngx_http_script_flush_no_cacheable_variables(r, scf->flushes);
549 le.flushed = 1;
550
551 le.ip = scf->params_len->elts;
552 le.request = r;
553
554 while (*(uintptr_t *) le.ip) {
555
556 lcode = *(ngx_http_script_len_code_pt *) le.ip;
557 key_len = lcode(&le);
558
559 lcode = *(ngx_http_script_len_code_pt *) le.ip;
560 skip_empty = lcode(&le);
561
562 for (val_len = 0; *(uintptr_t *) le.ip; val_len += lcode(&le)) {
563 lcode = *(ngx_http_script_len_code_pt *) le.ip;
564 }
565 le.ip += sizeof(uintptr_t);
566
567 if (skip_empty && val_len == 0) {
568 continue;
569 }
570
571 len += key_len + val_len + 1;
572 }
573 }
574
575 if (scf->upstream.pass_request_headers) {
576
577 allocated = 0;
578 lowcase_key = NULL;
579
580 if (scf->header_params) {
581 n = 0;
582 part = &r->headers_in.headers.part;
583
584 while (part) {
585 n += part->nelts;
586 part = part->next;
587 }
588
589 ignored = ngx_palloc(r->pool, n * sizeof(void *));
590 if (ignored == NULL) {
591 return NGX_ERROR;
592 }
593 }
594
595 part = &r->headers_in.headers.part;
596 header = part->elts;
597
598 for (i = 0; /* void */; i++) {
599
600 if (i >= part->nelts) {
601 if (part->next == NULL) {
602 break;
603 }
604
605 part = part->next;
606 header = part->elts;
607 i = 0;
608 }
609
610 if (scf->header_params) {
611 if (allocated < header[i].key.len) {
612 allocated = header[i].key.len + 16;
613 lowcase_key = ngx_pnalloc(r->pool, allocated);
614 if (lowcase_key == NULL) {
615 return NGX_ERROR;
616 }
617 }
618
619 hash = 0;
620
621 for (n = 0; n < header[i].key.len; n++) {
622 ch = header[i].key.data[n];
623
624 if (ch >= 'A' && ch <= 'Z') {
625 ch |= 0x20;
626
627 } else if (ch == '-') {
628 ch = '_';
629 }
630
631 hash = ngx_hash(hash, ch);
632 lowcase_key[n] = ch;
633 }
634
635 if (ngx_hash_find(&scf->headers_hash, hash, lowcase_key, n)) {
636 ignored[header_params++] = &header[i];
637 continue;
638 }
639 }
640
641 len += sizeof("HTTP_") - 1 + header[i].key.len + 1
642 + header[i].value.len + 1;
643 }
644 }
645
646 /* netstring: "length:" + packet + "," */
647
648 b = ngx_create_temp_buf(r->pool, NGX_SIZE_T_LEN + 1 + len + 1);
649 if (b == NULL) {
650 return NGX_ERROR;
651 }
652
653 cl = ngx_alloc_chain_link(r->pool);
654 if (cl == NULL) {
655 return NGX_ERROR;
656 }
657
658 cl->buf = b;
659
660 b->last = ngx_snprintf(b->last,
661 NGX_SIZE_T_LEN + 1 + sizeof("CONTENT_LENGTH")
662 + NGX_OFF_T_LEN + 1,
663 "%ui:CONTENT_LENGTH%Z%V%Z",
664 len, content_length);
665
666 if (scf->params_len) {
667 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
668
669 e.ip = scf->params->elts;
670 e.pos = b->last;
671 e.request = r;
672 e.flushed = 1;
673
674 le.ip = scf->params_len->elts;
675
676 while (*(uintptr_t *) le.ip) {
677
678 lcode = *(ngx_http_script_len_code_pt *) le.ip;
679 lcode(&le); /* key length */
680
681 lcode = *(ngx_http_script_len_code_pt *) le.ip;
682 skip_empty = lcode(&le);
683
684 for (val_len = 0; *(uintptr_t *) le.ip; val_len += lcode(&le)) {
685 lcode = *(ngx_http_script_len_code_pt *) le.ip;
686 }
687 le.ip += sizeof(uintptr_t);
688
689 if (skip_empty && val_len == 0) {
690 e.skip = 1;
691
692 while (*(uintptr_t *) e.ip) {
693 code = *(ngx_http_script_code_pt *) e.ip;
694 code((ngx_http_script_engine_t *) &e);
695 }
696 e.ip += sizeof(uintptr_t);
697
698 e.skip = 0;
699
700 continue;
701 }
702
703 #if (NGX_DEBUG)
704 key = e.pos;
705 #endif
706 code = *(ngx_http_script_code_pt *) e.ip;
707 code((ngx_http_script_engine_t *) & e);
708
709 #if (NGX_DEBUG)
710 val = e.pos;
711 #endif
712 while (*(uintptr_t *) e.ip) {
713 code = *(ngx_http_script_code_pt *) e.ip;
714 code((ngx_http_script_engine_t *) &e);
715 }
716 *e.pos++ = '\0';
717 e.ip += sizeof(uintptr_t);
718
719 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
720 "scgi param: \"%s: %s\"", key, val);
721 }
722
723 b->last = e.pos;
724 }
725
726 if (scf->upstream.pass_request_headers) {
727
728 part = &r->headers_in.headers.part;
729 header = part->elts;
730
731 for (i = 0; /* void */; i++) {
732
733 if (i >= part->nelts) {
734 if (part->next == NULL) {
735 break;
736 }
737
738 part = part->next;
739 header = part->elts;
740 i = 0;
741 }
742
743 for (n = 0; n < header_params; n++) {
744 if (&header[i] == ignored[n]) {
745 goto next;
746 }
747 }
748
749 key = b->last;
750 b->last = ngx_cpymem(key, "HTTP_", sizeof("HTTP_") - 1);
751
752 for (n = 0; n < header[i].key.len; n++) {
753 ch = header[i].key.data[n];
754
755 if (ch >= 'a' && ch <= 'z') {
756 ch &= ~0x20;
757
758 } else if (ch == '-') {
759 ch = '_';
760 }
761
762 *b->last++ = ch;
763 }
764
765 *b->last++ = (u_char) 0;
766
767 val = b->last;
768 b->last = ngx_copy(val, header[i].value.data, header[i].value.len);
769 *b->last++ = (u_char) 0;
770
771 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
772 "scgi param: \"%s: %s\"", key, val);
773
774 next:
775
776 continue;
777 }
778 }
779
780 *b->last++ = (u_char) ',';
781
782 if (scf->upstream.pass_request_body) {
783 body = r->upstream->request_bufs;
784 r->upstream->request_bufs = cl;
785
786 while (body) {
787 b = ngx_alloc_buf(r->pool);
788 if (b == NULL) {
789 return NGX_ERROR;
790 }
791
792 ngx_memcpy(b, body->buf, sizeof(ngx_buf_t));
793
794 cl->next = ngx_alloc_chain_link(r->pool);
795 if (cl->next == NULL) {
796 return NGX_ERROR;
797 }
798
799 cl = cl->next;
800 cl->buf = b;
801
802 body = body->next;
803 }
804
805 } else {
806 r->upstream->request_bufs = cl;
807 }
808
809 cl->next = NULL;
810
811 return NGX_OK;
812 }
813
814
815 static ngx_int_t
816 ngx_http_scgi_reinit_request(ngx_http_request_t *r)
817 {
818 ngx_http_status_t *status;
819
820 status = ngx_http_get_module_ctx(r, ngx_http_scgi_module);
821
822 if (status == NULL) {
823 return NGX_OK;
824 }
825
826 status->code = 0;
827 status->count = 0;
828 status->start = NULL;
829 status->end = NULL;
830
831 r->upstream->process_header = ngx_http_scgi_process_status_line;
832
833 return NGX_OK;
834 }
835
836
837 static ngx_int_t
838 ngx_http_scgi_process_status_line(ngx_http_request_t *r)
839 {
840 size_t len;
841 ngx_int_t rc;
842 ngx_http_status_t *status;
843 ngx_http_upstream_t *u;
844
845 status = ngx_http_get_module_ctx(r, ngx_http_scgi_module);
846
847 if (status == NULL) {
848 return NGX_ERROR;
849 }
850
851 u = r->upstream;
852
853 rc = ngx_http_parse_status_line(r, &u->buffer, status);
854
855 if (rc == NGX_AGAIN) {
856 return rc;
857 }
858
859 if (rc == NGX_ERROR) {
860
861 r->http_version = NGX_HTTP_VERSION_9;
862
863 u->process_header = ngx_http_scgi_process_header;
864
865 return ngx_http_scgi_process_header(r);
866 }
867
868 if (u->state) {
869 u->state->status = status->code;
870 }
871
872 u->headers_in.status_n = status->code;
873
874 len = status->end - status->start;
875 u->headers_in.status_line.len = len;
876
877 u->headers_in.status_line.data = ngx_pnalloc(r->pool, len);
878 if (u->headers_in.status_line.data == NULL) {
879 return NGX_ERROR;
880 }
881
882 ngx_memcpy(u->headers_in.status_line.data, status->start, len);
883
884 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
885 "http scgi status %ui \"%V\"",
886 u->headers_in.status_n, &u->headers_in.status_line);
887
888 u->process_header = ngx_http_scgi_process_header;
889
890 return ngx_http_scgi_process_header(r);
891 }
892
893
894 static ngx_int_t
895 ngx_http_scgi_process_header(ngx_http_request_t *r)
896 {
897 ngx_str_t *status_line;
898 ngx_int_t rc, status;
899 ngx_table_elt_t *h;
900 ngx_http_upstream_t *u;
901 ngx_http_upstream_header_t *hh;
902 ngx_http_upstream_main_conf_t *umcf;
903
904 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
905
906 for ( ;; ) {
907
908 rc = ngx_http_parse_header_line(r, &r->upstream->buffer, 1);
909
910 if (rc == NGX_OK) {
911
912 /* a header line has been parsed successfully */
913
914 h = ngx_list_push(&r->upstream->headers_in.headers);
915 if (h == NULL) {
916 return NGX_ERROR;
917 }
918
919 h->hash = r->header_hash;
920
921 h->key.len = r->header_name_end - r->header_name_start;
922 h->value.len = r->header_end - r->header_start;
923
924 h->key.data = ngx_pnalloc(r->pool,
925 h->key.len + 1 + h->value.len + 1
926 + h->key.len);
927 if (h->key.data == NULL) {
928 return NGX_ERROR;
929 }
930
931 h->value.data = h->key.data + h->key.len + 1;
932 h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1;
933
934 ngx_cpystrn(h->key.data, r->header_name_start, h->key.len + 1);
935 ngx_cpystrn(h->value.data, r->header_start, h->value.len + 1);
936
937 if (h->key.len == r->lowcase_index) {
938 ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);
939
940 } else {
941 ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
942 }
943
944 hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
945 h->lowcase_key, h->key.len);
946
947 if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
948 return NGX_ERROR;
949 }
950
951 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
952 "http scgi header: \"%V: %V\"", &h->key, &h->value);
953
954 continue;
955 }
956
957 if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
958
959 /* a whole header has been parsed successfully */
960
961 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
962 "http scgi header done");
963
964 if (r->http_version > NGX_HTTP_VERSION_9) {
965 return NGX_OK;
966 }
967
968 u = r->upstream;
969
970 if (u->headers_in.status) {
971 status_line = &u->headers_in.status->value;
972
973 status = ngx_atoi(status_line->data, 3);
974 if (status == NGX_ERROR) {
975 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
976 "upstream sent invalid status \"%V\"",
977 status_line);
978 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
979 }
980
981 r->http_version = NGX_HTTP_VERSION_10;
982 u->headers_in.status_n = status;
983 u->headers_in.status_line = *status_line;
984
985 } else if (u->headers_in.location) {
986 r->http_version = NGX_HTTP_VERSION_10;
987 u->headers_in.status_n = 302;
988 ngx_str_set(&u->headers_in.status_line,
989 "302 Moved Temporarily");
990
991 } else {
992 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
993 "upstream sent neither valid HTTP/1.0 header "
994 "nor \"Status\" header line");
995 u->headers_in.status_n = 200;
996 ngx_str_set(&u->headers_in.status_line, "200 OK");
997 }
998
999 if (u->state) {
1000 u->state->status = u->headers_in.status_n;
1001 }
1002
1003 return NGX_OK;
1004 }
1005
1006 if (rc == NGX_AGAIN) {
1007 return NGX_AGAIN;
1008 }
1009
1010 /* there was error while a header line parsing */
1011
1012 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1013 "upstream sent invalid header");
1014
1015 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
1016 }
1017 }
1018
1019
1020 static void
1021 ngx_http_scgi_abort_request(ngx_http_request_t *r)
1022 {
1023 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1024 "abort http scgi request");
1025
1026 return;
1027 }
1028
1029
1030 static void
1031 ngx_http_scgi_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
1032 {
1033 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1034 "finalize http scgi request");
1035
1036 return;
1037 }
1038
1039
1040 static void *
1041 ngx_http_scgi_create_loc_conf(ngx_conf_t *cf)
1042 {
1043 ngx_http_scgi_loc_conf_t *conf;
1044
1045 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_scgi_loc_conf_t));
1046 if (conf == NULL) {
1047 return NULL;
1048 }
1049
1050 conf->upstream.store = NGX_CONF_UNSET;
1051 conf->upstream.store_access = NGX_CONF_UNSET_UINT;
1052 conf->upstream.buffering = NGX_CONF_UNSET;
1053 conf->upstream.ignore_client_abort = NGX_CONF_UNSET;
1054
1055 conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
1056 conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
1057 conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
1058
1059 conf->upstream.send_lowat = NGX_CONF_UNSET_SIZE;
1060 conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE;
1061
1062 conf->upstream.busy_buffers_size_conf = NGX_CONF_UNSET_SIZE;
1063 conf->upstream.max_temp_file_size_conf = NGX_CONF_UNSET_SIZE;
1064 conf->upstream.temp_file_write_size_conf = NGX_CONF_UNSET_SIZE;
1065
1066 conf->upstream.pass_request_headers = NGX_CONF_UNSET;
1067 conf->upstream.pass_request_body = NGX_CONF_UNSET;
1068
1069 #if (NGX_HTTP_CACHE)
1070 conf->upstream.cache = NGX_CONF_UNSET_PTR;
1071 conf->upstream.cache_min_uses = NGX_CONF_UNSET_UINT;
1072 conf->upstream.cache_bypass = NGX_CONF_UNSET_PTR;
1073 conf->upstream.no_cache = NGX_CONF_UNSET_PTR;
1074 conf->upstream.cache_valid = NGX_CONF_UNSET_PTR;
1075 #endif
1076
1077 conf->upstream.hide_headers = NGX_CONF_UNSET_PTR;
1078 conf->upstream.pass_headers = NGX_CONF_UNSET_PTR;
1079
1080 conf->upstream.intercept_errors = NGX_CONF_UNSET;
1081
1082 /* "scgi_cyclic_temp_file" is disabled */
1083 conf->upstream.cyclic_temp_file = 0;
1084
1085 conf->upstream.change_buffering = 1;
1086
1087 ngx_str_set(&conf->upstream.module, "scgi");
1088
1089 return conf;
1090 }
1091
1092
1093 static char *
1094 ngx_http_scgi_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
1095 {
1096 ngx_http_scgi_loc_conf_t *prev = parent;
1097 ngx_http_scgi_loc_conf_t *conf = child;
1098
1099 size_t size;
1100 ngx_hash_init_t hash;
1101 ngx_http_core_loc_conf_t *clcf;
1102
1103 if (conf->upstream.store != 0) {
1104 ngx_conf_merge_value(conf->upstream.store, prev->upstream.store, 0);
1105
1106 if (conf->upstream.store_lengths == NULL) {
1107 conf->upstream.store_lengths = prev->upstream.store_lengths;
1108 conf->upstream.store_values = prev->upstream.store_values;
1109 }
1110 }
1111
1112 ngx_conf_merge_uint_value(conf->upstream.store_access,
1113 prev->upstream.store_access, 0600);
1114
1115 ngx_conf_merge_value(conf->upstream.buffering,
1116 prev->upstream.buffering, 1);
1117
1118 ngx_conf_merge_value(conf->upstream.ignore_client_abort,
1119 prev->upstream.ignore_client_abort, 0);
1120
1121 ngx_conf_merge_msec_value(conf->upstream.connect_timeout,
1122 prev->upstream.connect_timeout, 60000);
1123
1124 ngx_conf_merge_msec_value(conf->upstream.send_timeout,
1125 prev->upstream.send_timeout, 60000);
1126
1127 ngx_conf_merge_msec_value(conf->upstream.read_timeout,
1128 prev->upstream.read_timeout, 60000);
1129
1130 ngx_conf_merge_size_value(conf->upstream.send_lowat,
1131 prev->upstream.send_lowat, 0);
1132
1133 ngx_conf_merge_size_value(conf->upstream.buffer_size,
1134 prev->upstream.buffer_size,
1135 (size_t) ngx_pagesize);
1136
1137
1138 ngx_conf_merge_bufs_value(conf->upstream.bufs, prev->upstream.bufs,
1139 8, ngx_pagesize);
1140
1141 if (conf->upstream.bufs.num < 2) {
1142 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1143 "there must be at least 2 \"scgi_buffers\"");
1144 return NGX_CONF_ERROR;
1145 }
1146
1147
1148 size = conf->upstream.buffer_size;
1149 if (size < conf->upstream.bufs.size) {
1150 size = conf->upstream.bufs.size;
1151 }
1152
1153
1154 ngx_conf_merge_size_value(conf->upstream.busy_buffers_size_conf,
1155 prev->upstream.busy_buffers_size_conf,
1156 NGX_CONF_UNSET_SIZE);
1157
1158 if (conf->upstream.busy_buffers_size_conf == NGX_CONF_UNSET_SIZE) {
1159 conf->upstream.busy_buffers_size = 2 * size;
1160 } else {
1161 conf->upstream.busy_buffers_size =
1162 conf->upstream.busy_buffers_size_conf;
1163 }
1164
1165 if (conf->upstream.busy_buffers_size < size) {
1166 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1167 "\"scgi_busy_buffers_size\" must be equal or bigger "
1168 "than maximum of the value of \"scgi_buffer_size\" and "
1169 "one of the \"scgi_buffers\"");
1170
1171 return NGX_CONF_ERROR;
1172 }
1173
1174 if (conf->upstream.busy_buffers_size
1175 > (conf->upstream.bufs.num - 1) * conf->upstream.bufs.size)
1176 {
1177 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1178 "\"scgi_busy_buffers_size\" must be less than "
1179 "the size of all \"scgi_buffers\" minus one buffer");
1180
1181 return NGX_CONF_ERROR;
1182 }
1183
1184
1185 ngx_conf_merge_size_value(conf->upstream.temp_file_write_size_conf,
1186 prev->upstream.temp_file_write_size_conf,
1187 NGX_CONF_UNSET_SIZE);
1188
1189 if (conf->upstream.temp_file_write_size_conf == NGX_CONF_UNSET_SIZE) {
1190 conf->upstream.temp_file_write_size = 2 * size;
1191 } else {
1192 conf->upstream.temp_file_write_size =
1193 conf->upstream.temp_file_write_size_conf;
1194 }
1195
1196 if (conf->upstream.temp_file_write_size < size) {
1197 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1198 "\"scgi_temp_file_write_size\" must be equal or bigger than "
1199 "maximum of the value of \"scgi_buffer_size\" and "
1200 "one of the \"scgi_buffers\"");
1201
1202 return NGX_CONF_ERROR;
1203 }
1204
1205
1206 ngx_conf_merge_size_value(conf->upstream.max_temp_file_size_conf,
1207 prev->upstream.max_temp_file_size_conf,
1208 NGX_CONF_UNSET_SIZE);
1209
1210 if (conf->upstream.max_temp_file_size_conf == NGX_CONF_UNSET_SIZE) {
1211 conf->upstream.max_temp_file_size = 1024 * 1024 * 1024;
1212 } else {
1213 conf->upstream.max_temp_file_size =
1214 conf->upstream.max_temp_file_size_conf;
1215 }
1216
1217 if (conf->upstream.max_temp_file_size != 0
1218 && conf->upstream.max_temp_file_size < size) {
1219 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1220 "\"scgi_max_temp_file_size\" must be equal to zero to disable "
1221 "the temporary files usage or must be equal or bigger than "
1222 "maximum of the value of \"scgi_buffer_size\" and "
1223 "one of the \"scgi_buffers\"");
1224
1225 return NGX_CONF_ERROR;
1226 }
1227
1228
1229 ngx_conf_merge_bitmask_value(conf->upstream.ignore_headers,
1230 prev->upstream.ignore_headers,
1231 NGX_CONF_BITMASK_SET);
1232
1233
1234 ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
1235 prev->upstream.next_upstream,
1236 (NGX_CONF_BITMASK_SET
1237 |NGX_HTTP_UPSTREAM_FT_ERROR
1238 |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
1239
1240 if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
1241 conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
1242 |NGX_HTTP_UPSTREAM_FT_OFF;
1243 }
1244
1245 if (ngx_conf_merge_path_value(cf, &conf->upstream.temp_path,
1246 prev->upstream.temp_path,
1247 &ngx_http_scgi_temp_path)
1248 != NGX_OK)
1249 {
1250 return NGX_CONF_ERROR;
1251 }
1252
1253 #if (NGX_HTTP_CACHE)
1254
1255 ngx_conf_merge_ptr_value(conf->upstream.cache,
1256 prev->upstream.cache, NULL);
1257
1258 if (conf->upstream.cache && conf->upstream.cache->data == NULL) {
1259 ngx_shm_zone_t *shm_zone;
1260
1261 shm_zone = conf->upstream.cache;
1262
1263 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1264 "\"scgi_cache\" zone \"%V\" is unknown",
1265 &shm_zone->shm.name);
1266
1267 return NGX_CONF_ERROR;
1268 }
1269
1270 ngx_conf_merge_uint_value(conf->upstream.cache_min_uses,
1271 prev->upstream.cache_min_uses, 1);
1272
1273 ngx_conf_merge_bitmask_value(conf->upstream.cache_use_stale,
1274 prev->upstream.cache_use_stale,
1275 (NGX_CONF_BITMASK_SET
1276 |NGX_HTTP_UPSTREAM_FT_OFF));
1277
1278 if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_OFF) {
1279 conf->upstream.cache_use_stale = NGX_CONF_BITMASK_SET
1280 |NGX_HTTP_UPSTREAM_FT_OFF;
1281 }
1282
1283 if (conf->upstream.cache_methods == 0) {
1284 conf->upstream.cache_methods = prev->upstream.cache_methods;
1285 }
1286
1287 conf->upstream.cache_methods |= NGX_HTTP_GET|NGX_HTTP_HEAD;
1288
1289 ngx_conf_merge_ptr_value(conf->upstream.cache_bypass,
1290 prev->upstream.cache_bypass, NULL);
1291
1292 ngx_conf_merge_ptr_value(conf->upstream.no_cache,
1293 prev->upstream.no_cache, NULL);
1294
1295 ngx_conf_merge_ptr_value(conf->upstream.cache_valid,
1296 prev->upstream.cache_valid, NULL);
1297
1298 if (conf->cache_key.value.data == NULL) {
1299 conf->cache_key = prev->cache_key;
1300 }
1301
1302 #endif
1303
1304 ngx_conf_merge_value(conf->upstream.pass_request_headers,
1305 prev->upstream.pass_request_headers, 1);
1306 ngx_conf_merge_value(conf->upstream.pass_request_body,
1307 prev->upstream.pass_request_body, 1);
1308
1309 ngx_conf_merge_value(conf->upstream.intercept_errors,
1310 prev->upstream.intercept_errors, 0);
1311
1312 hash.max_size = 512;
1313 hash.bucket_size = ngx_align(64, ngx_cacheline_size);
1314 hash.name = "scgi_hide_headers_hash";
1315
1316 if (ngx_http_upstream_hide_headers_hash(cf, &conf->upstream,
1317 &prev->upstream, ngx_http_scgi_hide_headers, &hash)
1318 != NGX_OK)
1319 {
1320 return NGX_CONF_ERROR;
1321 }
1322
1323 if (conf->upstream.upstream == NULL) {
1324 conf->upstream.upstream = prev->upstream.upstream;
1325 }
1326
1327 if (conf->scgi_lengths == NULL) {
1328 conf->scgi_lengths = prev->scgi_lengths;
1329 conf->scgi_values = prev->scgi_values;
1330 }
1331
1332 if (conf->upstream.upstream || conf->scgi_lengths) {
1333 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
1334 if (clcf->handler == NULL && clcf->lmt_excpt) {
1335 clcf->handler = ngx_http_scgi_handler;
1336 }
1337 }
1338
1339 if (ngx_http_scgi_merge_params(cf, conf, prev) != NGX_OK) {
1340 return NGX_CONF_ERROR;
1341 }
1342
1343 return NGX_CONF_OK;
1344 }
1345
1346
1347 static ngx_int_t
1348 ngx_http_scgi_merge_params(ngx_conf_t *cf, ngx_http_scgi_loc_conf_t *conf,
1349 ngx_http_scgi_loc_conf_t *prev)
1350 {
1351 u_char *p;
1352 size_t size;
1353 uintptr_t *code;
1354 ngx_uint_t i, nsrc;
1355 ngx_array_t headers_names;
1356 #if (NGX_HTTP_CACHE)
1357 ngx_array_t params_merged;
1358 #endif
1359 ngx_hash_key_t *hk;
1360 ngx_hash_init_t hash;
1361 ngx_http_upstream_param_t *src;
1362 ngx_http_script_compile_t sc;
1363 ngx_http_script_copy_code_t *copy;
1364
1365 if (conf->params_source == NULL) {
1366 conf->params_source = prev->params_source;
1367
1368 if (prev->headers_hash.buckets
1369 #if (NGX_HTTP_CACHE)
1370 && ((conf->upstream.cache == NULL) == (prev->upstream.cache == NULL))
1371 #endif
1372 )
1373 {
1374 conf->flushes = prev->flushes;
1375 conf->params_len = prev->params_len;
1376 conf->params = prev->params;
1377 conf->headers_hash = prev->headers_hash;
1378 conf->header_params = prev->header_params;
1379
1380 return NGX_OK;
1381 }
1382 }
1383
1384 if (conf->params_source == NULL
1385 #if (NGX_HTTP_CACHE)
1386 && (conf->upstream.cache == NULL)
1387 #endif
1388 )
1389 {
1390 conf->headers_hash.buckets = (void *) 1;
1391 return NGX_OK;
1392 }
1393
1394 conf->params_len = ngx_array_create(cf->pool, 64, 1);
1395 if (conf->params_len == NULL) {
1396 return NGX_ERROR;
1397 }
1398
1399 conf->params = ngx_array_create(cf->pool, 512, 1);
1400 if (conf->params == NULL) {
1401 return NGX_ERROR;
1402 }
1403
1404 if (ngx_array_init(&headers_names, cf->temp_pool, 4, sizeof(ngx_hash_key_t))
1405 != NGX_OK)
1406 {
1407 return NGX_ERROR;
1408 }
1409
1410 if (conf->params_source) {
1411 src = conf->params_source->elts;
1412 nsrc = conf->params_source->nelts;
1413
1414 } else {
1415 src = NULL;
1416 nsrc = 0;
1417 }
1418
1419 #if (NGX_HTTP_CACHE)
1420
1421 if (conf->upstream.cache) {
1422 ngx_keyval_t *h;
1423 ngx_http_upstream_param_t *s;
1424
1425 if (ngx_array_init(&params_merged, cf->temp_pool, 4,
1426 sizeof(ngx_http_upstream_param_t))
1427 != NGX_OK)
1428 {
1429 return NGX_ERROR;
1430 }
1431
1432 for (i = 0; i < nsrc; i++) {
1433
1434 s = ngx_array_push(&params_merged);
1435 if (s == NULL) {
1436 return NGX_ERROR;
1437 }
1438
1439 *s = src[i];
1440 }
1441
1442 h = ngx_http_scgi_cache_headers;
1443
1444 while (h->key.len) {
1445
1446 src = params_merged.elts;
1447 nsrc = params_merged.nelts;
1448
1449 for (i = 0; i < nsrc; i++) {
1450 if (ngx_strcasecmp(h->key.data, src[i].key.data) == 0) {
1451 goto next;
1452 }
1453 }
1454
1455 s = ngx_array_push(&params_merged);
1456 if (s == NULL) {
1457 return NGX_ERROR;
1458 }
1459
1460 s->key = h->key;
1461 s->value = h->value;
1462 s->skip_empty = 0;
1463
1464 next:
1465
1466 h++;
1467 }
1468
1469 src = params_merged.elts;
1470 nsrc = params_merged.nelts;
1471 }
1472
1473 #endif
1474
1475 for (i = 0; i < nsrc; i++) {
1476
1477 if (src[i].key.len > sizeof("HTTP_") - 1
1478 && ngx_strncmp(src[i].key.data, "HTTP_", sizeof("HTTP_") - 1) == 0)
1479 {
1480 hk = ngx_array_push(&headers_names);
1481 if (hk == NULL) {
1482 return NGX_ERROR;
1483 }
1484
1485 hk->key.len = src[i].key.len - 5;
1486 hk->key.data = src[i].key.data + 5;
1487 hk->key_hash = ngx_hash_key_lc(hk->key.data, hk->key.len);
1488 hk->value = (void *) 1;
1489
1490 if (src[i].value.len == 0) {
1491 continue;
1492 }
1493 }
1494
1495 copy = ngx_array_push_n(conf->params_len,
1496 sizeof(ngx_http_script_copy_code_t));
1497 if (copy == NULL) {
1498 return NGX_ERROR;
1499 }
1500
1501 copy->code = (ngx_http_script_code_pt) ngx_http_script_copy_len_code;
1502 copy->len = src[i].key.len + 1;
1503
1504 copy = ngx_array_push_n(conf->params_len,
1505 sizeof(ngx_http_script_copy_code_t));
1506 if (copy == NULL) {
1507 return NGX_ERROR;
1508 }
1509
1510 copy->code = (ngx_http_script_code_pt) ngx_http_script_copy_len_code;
1511 copy->len = src[i].skip_empty;
1512
1513
1514 size = (sizeof(ngx_http_script_copy_code_t)
1515 + src[i].key.len + 1 + sizeof(uintptr_t) - 1)
1516 & ~(sizeof(uintptr_t) - 1);
1517
1518 copy = ngx_array_push_n(conf->params, size);
1519 if (copy == NULL) {
1520 return NGX_ERROR;
1521 }
1522
1523 copy->code = ngx_http_script_copy_code;
1524 copy->len = src[i].key.len + 1;
1525
1526 p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
1527 (void) ngx_cpystrn(p, src[i].key.data, src[i].key.len + 1);
1528
1529
1530 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
1531
1532 sc.cf = cf;
1533 sc.source = &src[i].value;
1534 sc.flushes = &conf->flushes;
1535 sc.lengths = &conf->params_len;
1536 sc.values = &conf->params;
1537
1538 if (ngx_http_script_compile(&sc) != NGX_OK) {
1539 return NGX_ERROR;
1540 }
1541
1542 code = ngx_array_push_n(conf->params_len, sizeof(uintptr_t));
1543 if (code == NULL) {
1544 return NGX_ERROR;
1545 }
1546
1547 *code = (uintptr_t) NULL;
1548
1549
1550 code = ngx_array_push_n(conf->params, sizeof(uintptr_t));
1551 if (code == NULL) {
1552 return NGX_ERROR;
1553 }
1554
1555 *code = (uintptr_t) NULL;
1556 }
1557
1558 code = ngx_array_push_n(conf->params_len, sizeof(uintptr_t));
1559 if (code == NULL) {
1560 return NGX_ERROR;
1561 }
1562
1563 *code = (uintptr_t) NULL;
1564
1565 code = ngx_array_push_n(conf->params, sizeof(uintptr_t));
1566 if (code == NULL) {
1567 return NGX_ERROR;
1568 }
1569
1570 *code = (uintptr_t) NULL;
1571
1572 conf->header_params = headers_names.nelts;
1573
1574 hash.hash = &conf->headers_hash;
1575 hash.key = ngx_hash_key_lc;
1576 hash.max_size = 512;
1577 hash.bucket_size = 64;
1578 hash.name = "scgi_params_hash";
1579 hash.pool = cf->pool;
1580 hash.temp_pool = NULL;
1581
1582 return ngx_hash_init(&hash, headers_names.elts, headers_names.nelts);
1583 }
1584
1585
1586 static char *
1587 ngx_http_scgi_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1588 {
1589 ngx_http_scgi_loc_conf_t *scf = conf;
1590
1591 ngx_url_t u;
1592 ngx_str_t *value, *url;
1593 ngx_uint_t n;
1594 ngx_http_core_loc_conf_t *clcf;
1595 ngx_http_script_compile_t sc;
1596
1597 if (scf->upstream.upstream || scf->scgi_lengths) {
1598 return "is duplicate";
1599 }
1600
1601 clcf = ngx_http_conf_get_module_loc_conf (cf, ngx_http_core_module);
1602 clcf->handler = ngx_http_scgi_handler;
1603
1604 value = cf->args->elts;
1605
1606 url = &value[1];
1607
1608 n = ngx_http_script_variables_count(url);
1609
1610 if (n) {
1611
1612 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
1613
1614 sc.cf = cf;
1615 sc.source = url;
1616 sc.lengths = &scf->scgi_lengths;
1617 sc.values = &scf->scgi_values;
1618 sc.variables = n;
1619 sc.complete_lengths = 1;
1620 sc.complete_values = 1;
1621
1622 if (ngx_http_script_compile(&sc) != NGX_OK) {
1623 return NGX_CONF_ERROR;
1624 }
1625
1626 return NGX_CONF_OK;
1627 }
1628
1629 ngx_memzero(&u, sizeof(ngx_url_t));
1630
1631 u.url = value[1];
1632 u.no_resolve = 1;
1633
1634 scf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0);
1635 if (scf->upstream.upstream == NULL) {
1636 return NGX_CONF_ERROR;
1637 }
1638
1639 if (clcf->name.data[clcf->name.len - 1] == '/') {
1640 clcf->auto_redirect = 1;
1641 }
1642
1643 return NGX_CONF_OK;
1644 }
1645
1646
1647 static char *
1648 ngx_http_scgi_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1649 {
1650 ngx_http_scgi_loc_conf_t *scf = conf;
1651
1652 ngx_str_t *value;
1653 ngx_http_script_compile_t sc;
1654
1655 if (scf->upstream.store != NGX_CONF_UNSET || scf->upstream.store_lengths) {
1656 return "is duplicate";
1657 }
1658
1659 value = cf->args->elts;
1660
1661 if (ngx_strcmp(value[1].data, "off") == 0) {
1662 scf->upstream.store = 0;
1663 return NGX_CONF_OK;
1664 }
1665
1666 #if (NGX_HTTP_CACHE)
1667
1668 if (scf->upstream.cache != NGX_CONF_UNSET_PTR
1669 && scf->upstream.cache != NULL)
1670 {
1671 return "is incompatible with \"scgi_cache\"";
1672 }
1673
1674 #endif
1675
1676 if (ngx_strcmp(value[1].data, "on") == 0) {
1677 scf->upstream.store = 1;
1678 return NGX_CONF_OK;
1679 }
1680
1681 /* include the terminating '\0' into script */
1682 value[1].len++;
1683
1684 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
1685
1686 sc.cf = cf;
1687 sc.source = &value[1];
1688 sc.lengths = &scf->upstream.store_lengths;
1689 sc.values = &scf->upstream.store_values;
1690 sc.variables = ngx_http_script_variables_count(&value[1]);;
1691 sc.complete_lengths = 1;
1692 sc.complete_values = 1;
1693
1694 if (ngx_http_script_compile(&sc) != NGX_OK) {
1695 return NGX_CONF_ERROR;
1696 }
1697
1698 return NGX_CONF_OK;
1699 }
1700
1701
1702 #if (NGX_HTTP_CACHE)
1703
1704 static char *
1705 ngx_http_scgi_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1706 {
1707 ngx_http_scgi_loc_conf_t *scf = conf;
1708
1709 ngx_str_t *value;
1710
1711 value = cf->args->elts;
1712
1713 if (scf->upstream.cache != NGX_CONF_UNSET_PTR) {
1714 return "is duplicate";
1715 }
1716
1717 if (ngx_strcmp(value[1].data, "off") == 0) {
1718 scf->upstream.cache = NULL;
1719 return NGX_CONF_OK;
1720 }
1721
1722 if (scf->upstream.store > 0 || scf->upstream.store_lengths) {
1723 return "is incompatible with \"scgi_store\"";
1724 }
1725
1726 scf->upstream.cache = ngx_shared_memory_add(cf, &value[1], 0,
1727 &ngx_http_scgi_module);
1728 if (scf->upstream.cache == NULL) {
1729 return NGX_CONF_ERROR;
1730 }
1731
1732 return NGX_CONF_OK;
1733 }
1734
1735
1736 static char *
1737 ngx_http_scgi_cache_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1738 {
1739 ngx_http_scgi_loc_conf_t *scf = conf;
1740
1741 ngx_str_t *value;
1742 ngx_http_compile_complex_value_t ccv;
1743
1744 value = cf->args->elts;
1745
1746 if (scf->cache_key.value.len) {
1747 return "is duplicate";
1748 }
1749
1750 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
1751
1752 ccv.cf = cf;
1753 ccv.value = &value[1];
1754 ccv.complex_value = &scf->cache_key;
1755
1756 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
1757 return NGX_CONF_ERROR;
1758 }
1759
1760 return NGX_CONF_OK;
1761 }
1762
1763 #endif
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