Mercurial > hg > nginx
annotate src/http/modules/ngx_http_sub_filter_module.c @ 5249:725fb71ab1a6
SPDY: pass through the full status when available.
Avoid stripping the status text when proxying for compatibility with http.
author | Jim Radford <radford@galvanix.com> |
---|---|
date | Fri, 07 Jun 2013 13:16:00 -0700 |
parents | 4c1a604b0285 |
children | eaa9c732a1b9 |
rev | line source |
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1172 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
1172 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 typedef struct { | |
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14 ngx_str_t match; |
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15 ngx_http_complex_value_t value; |
1172 | 16 |
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17 ngx_hash_t types; |
1172 | 18 |
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19 ngx_flag_t once; |
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20 ngx_flag_t last_modified; |
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21 |
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22 ngx_array_t *types_keys; |
1172 | 23 } ngx_http_sub_loc_conf_t; |
24 | |
25 | |
26 typedef enum { | |
27 sub_start_state = 0, | |
28 sub_match_state, | |
29 } ngx_http_sub_state_e; | |
30 | |
31 | |
32 typedef struct { | |
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33 ngx_str_t match; |
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34 ngx_str_t saved; |
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35 ngx_str_t looked; |
1172 | 36 |
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37 ngx_uint_t once; /* unsigned once:1 */ |
1172 | 38 |
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39 ngx_buf_t *buf; |
1172 | 40 |
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41 u_char *pos; |
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42 u_char *copy_start; |
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43 u_char *copy_end; |
1172 | 44 |
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45 ngx_chain_t *in; |
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46 ngx_chain_t *out; |
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47 ngx_chain_t **last_out; |
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48 ngx_chain_t *busy; |
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49 ngx_chain_t *free; |
1172 | 50 |
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51 ngx_str_t sub; |
1172 | 52 |
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53 ngx_uint_t state; |
1172 | 54 } ngx_http_sub_ctx_t; |
55 | |
56 | |
57 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r, | |
58 ngx_http_sub_ctx_t *ctx); | |
59 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r, | |
60 ngx_http_sub_ctx_t *ctx); | |
61 | |
62 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
63 void *conf); | |
64 static void *ngx_http_sub_create_conf(ngx_conf_t *cf); | |
65 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf, | |
66 void *parent, void *child); | |
67 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf); | |
68 | |
69 | |
70 static ngx_command_t ngx_http_sub_filter_commands[] = { | |
71 | |
72 { ngx_string("sub_filter"), | |
73 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
74 ngx_http_sub_filter, | |
75 NGX_HTTP_LOC_CONF_OFFSET, | |
76 0, | |
77 NULL }, | |
78 | |
79 { ngx_string("sub_filter_types"), | |
80 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, | |
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81 ngx_http_types_slot, |
1172 | 82 NGX_HTTP_LOC_CONF_OFFSET, |
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83 offsetof(ngx_http_sub_loc_conf_t, types_keys), |
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84 &ngx_http_html_default_types[0] }, |
1172 | 85 |
86 { ngx_string("sub_filter_once"), | |
87 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
88 ngx_conf_set_flag_slot, | |
89 NGX_HTTP_LOC_CONF_OFFSET, | |
90 offsetof(ngx_http_sub_loc_conf_t, once), | |
91 NULL }, | |
92 | |
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93 { ngx_string("sub_filter_last_modified"), |
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94 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, |
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95 ngx_conf_set_flag_slot, |
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96 NGX_HTTP_LOC_CONF_OFFSET, |
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97 offsetof(ngx_http_sub_loc_conf_t, last_modified), |
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98 NULL }, |
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99 |
1172 | 100 ngx_null_command |
101 }; | |
102 | |
103 | |
104 static ngx_http_module_t ngx_http_sub_filter_module_ctx = { | |
105 NULL, /* preconfiguration */ | |
106 ngx_http_sub_filter_init, /* postconfiguration */ | |
107 | |
108 NULL, /* create main configuration */ | |
109 NULL, /* init main configuration */ | |
110 | |
111 NULL, /* create server configuration */ | |
112 NULL, /* merge server configuration */ | |
113 | |
114 ngx_http_sub_create_conf, /* create location configuration */ | |
115 ngx_http_sub_merge_conf /* merge location configuration */ | |
116 }; | |
117 | |
118 | |
119 ngx_module_t ngx_http_sub_filter_module = { | |
120 NGX_MODULE_V1, | |
121 &ngx_http_sub_filter_module_ctx, /* module context */ | |
122 ngx_http_sub_filter_commands, /* module directives */ | |
123 NGX_HTTP_MODULE, /* module type */ | |
124 NULL, /* init master */ | |
125 NULL, /* init module */ | |
126 NULL, /* init process */ | |
127 NULL, /* init thread */ | |
128 NULL, /* exit thread */ | |
129 NULL, /* exit process */ | |
130 NULL, /* exit master */ | |
131 NGX_MODULE_V1_PADDING | |
132 }; | |
133 | |
134 | |
135 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
136 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
137 | |
138 | |
139 static ngx_int_t | |
140 ngx_http_sub_header_filter(ngx_http_request_t *r) | |
141 { | |
142 ngx_http_sub_ctx_t *ctx; | |
143 ngx_http_sub_loc_conf_t *slcf; | |
144 | |
145 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
146 | |
147 if (slcf->match.len == 0 | |
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148 || r->headers_out.content_length_n == 0 |
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149 || ngx_http_test_content_type(r, &slcf->types) == NULL) |
1172 | 150 { |
151 return ngx_http_next_header_filter(r); | |
152 } | |
153 | |
154 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t)); | |
155 if (ctx == NULL) { | |
156 return NGX_ERROR; | |
157 } | |
158 | |
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159 ctx->saved.data = ngx_pnalloc(r->pool, slcf->match.len); |
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160 if (ctx->saved.data == NULL) { |
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161 return NGX_ERROR; |
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162 } |
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163 |
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164 ctx->looked.data = ngx_pnalloc(r->pool, slcf->match.len); |
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165 if (ctx->looked.data == NULL) { |
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166 return NGX_ERROR; |
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167 } |
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168 |
1172 | 169 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module); |
170 | |
171 ctx->match = slcf->match; | |
172 ctx->last_out = &ctx->out; | |
173 | |
174 r->filter_need_in_memory = 1; | |
175 | |
176 if (r == r->main) { | |
177 ngx_http_clear_content_length(r); | |
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178 ngx_http_clear_etag(r); |
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179 |
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180 if (!slcf->last_modified) { |
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181 ngx_http_clear_last_modified(r); |
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182 } |
1172 | 183 } |
184 | |
185 return ngx_http_next_header_filter(r); | |
186 } | |
187 | |
188 | |
189 static ngx_int_t | |
190 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
191 { | |
192 ngx_int_t rc; | |
193 ngx_buf_t *b; | |
194 ngx_chain_t *cl; | |
195 ngx_http_sub_ctx_t *ctx; | |
196 ngx_http_sub_loc_conf_t *slcf; | |
197 | |
198 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module); | |
199 | |
200 if (ctx == NULL) { | |
201 return ngx_http_next_body_filter(r, in); | |
202 } | |
203 | |
204 if ((in == NULL | |
205 && ctx->buf == NULL | |
206 && ctx->in == NULL | |
207 && ctx->busy == NULL)) | |
208 { | |
209 return ngx_http_next_body_filter(r, in); | |
210 } | |
211 | |
212 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) { | |
213 | |
214 if (ctx->busy) { | |
215 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) { | |
216 return NGX_ERROR; | |
217 } | |
218 } | |
219 | |
220 return ngx_http_next_body_filter(r, in); | |
221 } | |
222 | |
223 /* add the incoming chain to the chain ctx->in */ | |
224 | |
225 if (in) { | |
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226 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { |
1172 | 227 return NGX_ERROR; |
228 } | |
229 } | |
230 | |
231 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
232 "http sub filter \"%V\"", &r->uri); | |
233 | |
234 while (ctx->in || ctx->buf) { | |
235 | |
3642 | 236 if (ctx->buf == NULL) { |
1172 | 237 ctx->buf = ctx->in->buf; |
238 ctx->in = ctx->in->next; | |
239 ctx->pos = ctx->buf->pos; | |
240 } | |
241 | |
242 if (ctx->state == sub_start_state) { | |
243 ctx->copy_start = ctx->pos; | |
244 ctx->copy_end = ctx->pos; | |
245 } | |
246 | |
247 b = NULL; | |
248 | |
249 while (ctx->pos < ctx->buf->last) { | |
250 | |
251 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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252 "saved: \"%V\" state: %d", &ctx->saved, ctx->state); |
1172 | 253 |
254 rc = ngx_http_sub_parse(r, ctx); | |
255 | |
256 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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257 "parse: %d, looked: \"%V\" %p-%p", |
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258 rc, &ctx->looked, ctx->copy_start, ctx->copy_end); |
1172 | 259 |
260 if (rc == NGX_ERROR) { | |
261 return rc; | |
262 } | |
263 | |
264 if (ctx->copy_start != ctx->copy_end) { | |
265 | |
266 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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267 "saved: \"%V\"", &ctx->saved); |
1172 | 268 |
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269 if (ctx->saved.len) { |
1172 | 270 |
271 if (ctx->free) { | |
272 cl = ctx->free; | |
273 ctx->free = ctx->free->next; | |
274 b = cl->buf; | |
275 ngx_memzero(b, sizeof(ngx_buf_t)); | |
276 | |
277 } else { | |
278 b = ngx_calloc_buf(r->pool); | |
279 if (b == NULL) { | |
280 return NGX_ERROR; | |
281 } | |
282 | |
283 cl = ngx_alloc_chain_link(r->pool); | |
284 if (cl == NULL) { | |
285 return NGX_ERROR; | |
286 } | |
287 | |
288 cl->buf = b; | |
289 } | |
290 | |
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291 b->pos = ngx_pnalloc(r->pool, ctx->saved.len); |
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292 if (b->pos == NULL) { |
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293 return NGX_ERROR; |
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294 } |
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295 |
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296 ngx_memcpy(b->pos, ctx->saved.data, ctx->saved.len); |
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297 b->last = b->pos + ctx->saved.len; |
1172 | 298 b->memory = 1; |
299 | |
300 *ctx->last_out = cl; | |
301 ctx->last_out = &cl->next; | |
302 | |
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303 ctx->saved.len = 0; |
1172 | 304 } |
305 | |
306 if (ctx->free) { | |
307 cl = ctx->free; | |
308 ctx->free = ctx->free->next; | |
309 b = cl->buf; | |
310 | |
311 } else { | |
312 b = ngx_alloc_buf(r->pool); | |
313 if (b == NULL) { | |
314 return NGX_ERROR; | |
315 } | |
316 | |
317 cl = ngx_alloc_chain_link(r->pool); | |
318 if (cl == NULL) { | |
319 return NGX_ERROR; | |
320 } | |
321 | |
322 cl->buf = b; | |
323 } | |
324 | |
325 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); | |
326 | |
327 b->pos = ctx->copy_start; | |
328 b->last = ctx->copy_end; | |
329 b->shadow = NULL; | |
330 b->last_buf = 0; | |
331 b->recycled = 0; | |
332 | |
333 if (b->in_file) { | |
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334 b->file_last = b->file_pos + (b->last - ctx->buf->pos); |
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335 b->file_pos += b->pos - ctx->buf->pos; |
1172 | 336 } |
337 | |
338 cl->next = NULL; | |
339 *ctx->last_out = cl; | |
340 ctx->last_out = &cl->next; | |
341 } | |
342 | |
343 if (ctx->state == sub_start_state) { | |
344 ctx->copy_start = ctx->pos; | |
345 ctx->copy_end = ctx->pos; | |
346 | |
347 } else { | |
348 ctx->copy_start = NULL; | |
349 ctx->copy_end = NULL; | |
350 } | |
351 | |
352 if (rc == NGX_AGAIN) { | |
353 continue; | |
354 } | |
355 | |
356 | |
357 /* rc == NGX_OK */ | |
358 | |
359 b = ngx_calloc_buf(r->pool); | |
360 if (b == NULL) { | |
361 return NGX_ERROR; | |
362 } | |
363 | |
364 cl = ngx_alloc_chain_link(r->pool); | |
365 if (cl == NULL) { | |
366 return NGX_ERROR; | |
367 } | |
368 | |
369 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
370 | |
371 if (ctx->sub.data == NULL) { | |
372 | |
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373 if (ngx_http_complex_value(r, &slcf->value, &ctx->sub) |
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374 != NGX_OK) |
1172 | 375 { |
376 return NGX_ERROR; | |
377 } | |
378 } | |
379 | |
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380 if (ctx->sub.len) { |
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381 b->memory = 1; |
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382 b->pos = ctx->sub.data; |
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383 b->last = ctx->sub.data + ctx->sub.len; |
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384 |
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385 } else { |
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386 b->sync = 1; |
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387 } |
1172 | 388 |
389 cl->buf = b; | |
390 cl->next = NULL; | |
391 *ctx->last_out = cl; | |
392 ctx->last_out = &cl->next; | |
393 | |
394 ctx->once = slcf->once; | |
395 | |
396 continue; | |
397 } | |
398 | |
399 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) { | |
400 if (b == NULL) { | |
401 if (ctx->free) { | |
402 cl = ctx->free; | |
403 ctx->free = ctx->free->next; | |
404 b = cl->buf; | |
405 ngx_memzero(b, sizeof(ngx_buf_t)); | |
406 | |
407 } else { | |
408 b = ngx_calloc_buf(r->pool); | |
409 if (b == NULL) { | |
410 return NGX_ERROR; | |
411 } | |
412 | |
413 cl = ngx_alloc_chain_link(r->pool); | |
414 if (cl == NULL) { | |
415 return NGX_ERROR; | |
416 } | |
417 | |
418 cl->buf = b; | |
419 } | |
420 | |
421 b->sync = 1; | |
422 | |
423 cl->next = NULL; | |
424 *ctx->last_out = cl; | |
425 ctx->last_out = &cl->next; | |
426 } | |
427 | |
428 b->last_buf = ctx->buf->last_buf; | |
429 b->shadow = ctx->buf; | |
430 | |
431 b->recycled = ctx->buf->recycled; | |
432 } | |
433 | |
434 ctx->buf = NULL; | |
435 | |
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436 ctx->saved.len = ctx->looked.len; |
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437 ngx_memcpy(ctx->saved.data, ctx->looked.data, ctx->looked.len); |
1172 | 438 } |
439 | |
440 if (ctx->out == NULL && ctx->busy == NULL) { | |
441 return NGX_OK; | |
442 } | |
443 | |
444 return ngx_http_sub_output(r, ctx); | |
445 } | |
446 | |
447 | |
448 static ngx_int_t | |
449 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
450 { | |
451 ngx_int_t rc; | |
452 ngx_buf_t *b; | |
453 ngx_chain_t *cl; | |
454 | |
455 #if 1 | |
456 b = NULL; | |
457 for (cl = ctx->out; cl; cl = cl->next) { | |
458 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
459 "sub out: %p %p", cl->buf, cl->buf->pos); | |
460 if (cl->buf == b) { | |
461 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
462 "the same buf was used in sub"); | |
463 ngx_debug_point(); | |
464 return NGX_ERROR; | |
465 } | |
466 b = cl->buf; | |
467 } | |
468 #endif | |
469 | |
470 rc = ngx_http_next_body_filter(r, ctx->out); | |
471 | |
472 if (ctx->busy == NULL) { | |
473 ctx->busy = ctx->out; | |
474 | |
475 } else { | |
476 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } | |
477 cl->next = ctx->out; | |
478 } | |
479 | |
480 ctx->out = NULL; | |
481 ctx->last_out = &ctx->out; | |
482 | |
483 while (ctx->busy) { | |
484 | |
485 cl = ctx->busy; | |
486 b = cl->buf; | |
487 | |
488 if (ngx_buf_size(b) != 0) { | |
489 break; | |
490 } | |
491 | |
492 if (b->shadow) { | |
493 b->shadow->pos = b->shadow->last; | |
494 } | |
495 | |
496 ctx->busy = cl->next; | |
497 | |
498 if (ngx_buf_in_memory(b) || b->in_file) { | |
499 /* add data bufs only to the free buf chain */ | |
500 | |
501 cl->next = ctx->free; | |
502 ctx->free = cl; | |
503 } | |
504 } | |
505 | |
506 if (ctx->in || ctx->buf) { | |
507 r->buffered |= NGX_HTTP_SUB_BUFFERED; | |
508 | |
509 } else { | |
510 r->buffered &= ~NGX_HTTP_SUB_BUFFERED; | |
511 } | |
512 | |
513 return rc; | |
514 } | |
515 | |
516 | |
517 static ngx_int_t | |
518 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
519 { | |
520 u_char *p, *last, *copy_end, ch, match; | |
521 size_t looked; | |
522 ngx_http_sub_state_e state; | |
523 | |
524 if (ctx->once) { | |
525 ctx->copy_start = ctx->pos; | |
526 ctx->copy_end = ctx->buf->last; | |
527 ctx->pos = ctx->buf->last; | |
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528 ctx->looked.len = 0; |
1172 | 529 |
530 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once"); | |
531 | |
532 return NGX_AGAIN; | |
533 } | |
534 | |
535 state = ctx->state; | |
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536 looked = ctx->looked.len; |
1172 | 537 last = ctx->buf->last; |
538 copy_end = ctx->copy_end; | |
539 | |
540 for (p = ctx->pos; p < last; p++) { | |
541 | |
542 ch = *p; | |
543 ch = ngx_tolower(ch); | |
544 | |
545 if (state == sub_start_state) { | |
546 | |
547 /* the tight loop */ | |
548 | |
549 match = ctx->match.data[0]; | |
550 | |
551 for ( ;; ) { | |
552 if (ch == match) { | |
553 copy_end = p; | |
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554 ctx->looked.data[0] = *p; |
1172 | 555 looked = 1; |
556 state = sub_match_state; | |
557 | |
558 goto match_started; | |
559 } | |
560 | |
561 if (++p == last) { | |
562 break; | |
563 } | |
564 | |
565 ch = *p; | |
566 ch = ngx_tolower(ch); | |
567 } | |
568 | |
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569 ctx->state = state; |
1172 | 570 ctx->pos = p; |
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571 ctx->looked.len = looked; |
1172 | 572 ctx->copy_end = p; |
573 | |
574 if (ctx->copy_start == NULL) { | |
575 ctx->copy_start = ctx->buf->pos; | |
576 } | |
577 | |
578 return NGX_AGAIN; | |
579 | |
580 match_started: | |
581 | |
582 continue; | |
583 } | |
584 | |
585 /* state == sub_match_state */ | |
586 | |
587 if (ch == ctx->match.data[looked]) { | |
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588 ctx->looked.data[looked] = *p; |
1172 | 589 looked++; |
590 | |
591 if (looked == ctx->match.len) { | |
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592 if ((size_t) (p - ctx->pos) < looked) { |
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593 ctx->saved.len = 0; |
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594 } |
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595 |
1172 | 596 ctx->state = sub_start_state; |
597 ctx->pos = p + 1; | |
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598 ctx->looked.len = 0; |
1172 | 599 ctx->copy_end = copy_end; |
600 | |
601 if (ctx->copy_start == NULL && copy_end) { | |
602 ctx->copy_start = ctx->buf->pos; | |
603 } | |
604 | |
605 return NGX_OK; | |
606 } | |
607 | |
608 } else if (ch == ctx->match.data[0]) { | |
609 copy_end = p; | |
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610 ctx->looked.data[0] = *p; |
1172 | 611 looked = 1; |
612 | |
613 } else { | |
614 copy_end = p; | |
615 looked = 0; | |
616 state = sub_start_state; | |
617 } | |
618 } | |
619 | |
620 ctx->state = state; | |
621 ctx->pos = p; | |
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622 ctx->looked.len = looked; |
1172 | 623 |
624 ctx->copy_end = (state == sub_start_state) ? p : copy_end; | |
625 | |
626 if (ctx->copy_start == NULL && ctx->copy_end) { | |
627 ctx->copy_start = ctx->buf->pos; | |
628 } | |
629 | |
630 return NGX_AGAIN; | |
631 } | |
632 | |
633 | |
634 static char * | |
635 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
636 { | |
637 ngx_http_sub_loc_conf_t *slcf = conf; | |
638 | |
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639 ngx_str_t *value; |
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640 ngx_http_compile_complex_value_t ccv; |
1172 | 641 |
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642 if (slcf->match.data) { |
1172 | 643 return "is duplicate"; |
644 } | |
645 | |
646 value = cf->args->elts; | |
647 | |
2135 | 648 ngx_strlow(value[1].data, value[1].data, value[1].len); |
1172 | 649 |
2135 | 650 slcf->match = value[1]; |
1172 | 651 |
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652 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
1172 | 653 |
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654 ccv.cf = cf; |
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655 ccv.value = &value[2]; |
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656 ccv.complex_value = &slcf->value; |
1172 | 657 |
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658 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
1172 | 659 return NGX_CONF_ERROR; |
660 } | |
661 | |
662 return NGX_CONF_OK; | |
663 } | |
664 | |
665 | |
666 static void * | |
667 ngx_http_sub_create_conf(ngx_conf_t *cf) | |
668 { | |
669 ngx_http_sub_loc_conf_t *slcf; | |
670 | |
671 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t)); | |
672 if (slcf == NULL) { | |
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673 return NULL; |
1172 | 674 } |
675 | |
676 /* | |
677 * set by ngx_pcalloc(): | |
678 * | |
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679 * conf->match = { 0, NULL }; |
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680 * conf->sub = { 0, NULL }; |
1172 | 681 * conf->sub_lengths = NULL; |
682 * conf->sub_values = NULL; | |
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683 * conf->types = { NULL }; |
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684 * conf->types_keys = NULL; |
1172 | 685 */ |
686 | |
687 slcf->once = NGX_CONF_UNSET; | |
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688 slcf->last_modified = NGX_CONF_UNSET; |
1172 | 689 |
690 return slcf; | |
691 } | |
692 | |
693 | |
694 static char * | |
695 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
696 { | |
697 ngx_http_sub_loc_conf_t *prev = parent; | |
698 ngx_http_sub_loc_conf_t *conf = child; | |
699 | |
700 ngx_conf_merge_value(conf->once, prev->once, 1); | |
701 ngx_conf_merge_str_value(conf->match, prev->match, ""); | |
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702 ngx_conf_merge_value(conf->last_modified, prev->last_modified, 0); |
1172 | 703 |
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704 if (conf->value.value.data == NULL) { |
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705 conf->value = prev->value; |
1172 | 706 } |
707 | |
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708 if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types, |
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709 &prev->types_keys, &prev->types, |
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710 ngx_http_html_default_types) |
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711 != NGX_OK) |
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712 { |
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713 return NGX_CONF_ERROR; |
1172 | 714 } |
715 | |
716 return NGX_CONF_OK; | |
717 } | |
718 | |
719 | |
720 static ngx_int_t | |
721 ngx_http_sub_filter_init(ngx_conf_t *cf) | |
722 { | |
723 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
724 ngx_http_top_header_filter = ngx_http_sub_header_filter; | |
725 | |
726 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
727 ngx_http_top_body_filter = ngx_http_sub_body_filter; | |
728 | |
729 return NGX_OK; | |
730 } |