Mercurial > hg > nginx
annotate src/http/modules/ngx_http_sub_filter_module.c @ 2912:c7d57b539248
return NULL instead of NGX_CONF_ERROR on a create conf failure
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 02 Jun 2009 16:09:44 +0000 |
| parents | a6954ce88b80 |
| children | 6b8e5c882e47 f706037d7f10 |
| rev | line source |
|---|---|
| 1172 | 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 { | |
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13 ngx_str_t match; |
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14 ngx_http_complex_value_t value; |
| 1172 | 15 |
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16 ngx_hash_t types; |
| 1172 | 17 |
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18 ngx_flag_t once; |
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19 |
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20 ngx_array_t *types_keys; |
| 1172 | 21 } ngx_http_sub_loc_conf_t; |
| 22 | |
| 23 | |
| 24 typedef enum { | |
| 25 sub_start_state = 0, | |
| 26 sub_match_state, | |
| 27 } ngx_http_sub_state_e; | |
| 28 | |
| 29 | |
| 30 typedef struct { | |
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31 ngx_str_t match; |
| 1172 | 32 |
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33 ngx_uint_t once; /* unsigned once:1 */ |
| 1172 | 34 |
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35 ngx_buf_t *buf; |
| 1172 | 36 |
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37 u_char *pos; |
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38 u_char *copy_start; |
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39 u_char *copy_end; |
| 1172 | 40 |
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41 ngx_chain_t *in; |
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42 ngx_chain_t *out; |
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43 ngx_chain_t **last_out; |
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44 ngx_chain_t *busy; |
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45 ngx_chain_t *free; |
| 1172 | 46 |
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47 ngx_str_t sub; |
| 1172 | 48 |
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49 ngx_uint_t state; |
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50 size_t saved; |
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51 size_t looked; |
| 1172 | 52 } ngx_http_sub_ctx_t; |
| 53 | |
| 54 | |
| 55 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r, | |
| 56 ngx_http_sub_ctx_t *ctx); | |
| 57 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r, | |
| 58 ngx_http_sub_ctx_t *ctx); | |
| 59 | |
| 60 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 61 void *conf); | |
| 62 static void *ngx_http_sub_create_conf(ngx_conf_t *cf); | |
| 63 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf, | |
| 64 void *parent, void *child); | |
| 65 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf); | |
| 66 | |
| 67 | |
| 68 static ngx_command_t ngx_http_sub_filter_commands[] = { | |
| 69 | |
| 70 { ngx_string("sub_filter"), | |
| 71 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
| 72 ngx_http_sub_filter, | |
| 73 NGX_HTTP_LOC_CONF_OFFSET, | |
| 74 0, | |
| 75 NULL }, | |
| 76 | |
| 77 { ngx_string("sub_filter_types"), | |
| 78 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, | |
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79 ngx_http_types_slot, |
| 1172 | 80 NGX_HTTP_LOC_CONF_OFFSET, |
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81 offsetof(ngx_http_sub_loc_conf_t, types_keys), |
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82 &ngx_http_html_default_types[0] }, |
| 1172 | 83 |
| 84 { ngx_string("sub_filter_once"), | |
| 85 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
| 86 ngx_conf_set_flag_slot, | |
| 87 NGX_HTTP_LOC_CONF_OFFSET, | |
| 88 offsetof(ngx_http_sub_loc_conf_t, once), | |
| 89 NULL }, | |
| 90 | |
| 91 ngx_null_command | |
| 92 }; | |
| 93 | |
| 94 | |
| 95 static ngx_http_module_t ngx_http_sub_filter_module_ctx = { | |
| 96 NULL, /* preconfiguration */ | |
| 97 ngx_http_sub_filter_init, /* postconfiguration */ | |
| 98 | |
| 99 NULL, /* create main configuration */ | |
| 100 NULL, /* init main configuration */ | |
| 101 | |
| 102 NULL, /* create server configuration */ | |
| 103 NULL, /* merge server configuration */ | |
| 104 | |
| 105 ngx_http_sub_create_conf, /* create location configuration */ | |
| 106 ngx_http_sub_merge_conf /* merge location configuration */ | |
| 107 }; | |
| 108 | |
| 109 | |
| 110 ngx_module_t ngx_http_sub_filter_module = { | |
| 111 NGX_MODULE_V1, | |
| 112 &ngx_http_sub_filter_module_ctx, /* module context */ | |
| 113 ngx_http_sub_filter_commands, /* module directives */ | |
| 114 NGX_HTTP_MODULE, /* module type */ | |
| 115 NULL, /* init master */ | |
| 116 NULL, /* init module */ | |
| 117 NULL, /* init process */ | |
| 118 NULL, /* init thread */ | |
| 119 NULL, /* exit thread */ | |
| 120 NULL, /* exit process */ | |
| 121 NULL, /* exit master */ | |
| 122 NGX_MODULE_V1_PADDING | |
| 123 }; | |
| 124 | |
| 125 | |
| 126 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 127 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 128 | |
| 129 | |
| 130 static ngx_int_t | |
| 131 ngx_http_sub_header_filter(ngx_http_request_t *r) | |
| 132 { | |
| 133 ngx_http_sub_ctx_t *ctx; | |
| 134 ngx_http_sub_loc_conf_t *slcf; | |
| 135 | |
| 136 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
| 137 | |
| 138 if (slcf->match.len == 0 | |
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139 || r->headers_out.content_length_n == 0 |
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140 || ngx_http_test_content_type(r, &slcf->types) == NULL) |
| 1172 | 141 { |
| 142 return ngx_http_next_header_filter(r); | |
| 143 } | |
| 144 | |
| 145 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t)); | |
| 146 if (ctx == NULL) { | |
| 147 return NGX_ERROR; | |
| 148 } | |
| 149 | |
| 150 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module); | |
| 151 | |
| 152 ctx->match = slcf->match; | |
| 153 ctx->last_out = &ctx->out; | |
| 154 | |
| 155 r->filter_need_in_memory = 1; | |
| 156 | |
| 157 if (r == r->main) { | |
| 158 ngx_http_clear_content_length(r); | |
| 159 ngx_http_clear_last_modified(r); | |
| 160 } | |
| 161 | |
| 162 return ngx_http_next_header_filter(r); | |
| 163 } | |
| 164 | |
| 165 | |
| 166 static ngx_int_t | |
| 167 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 168 { | |
| 169 ngx_int_t rc; | |
| 170 ngx_buf_t *b; | |
| 171 ngx_chain_t *cl; | |
| 172 ngx_http_sub_ctx_t *ctx; | |
| 173 ngx_http_sub_loc_conf_t *slcf; | |
| 174 | |
| 175 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module); | |
| 176 | |
| 177 if (ctx == NULL) { | |
| 178 return ngx_http_next_body_filter(r, in); | |
| 179 } | |
| 180 | |
| 181 if ((in == NULL | |
| 182 && ctx->buf == NULL | |
| 183 && ctx->in == NULL | |
| 184 && ctx->busy == NULL)) | |
| 185 { | |
| 186 return ngx_http_next_body_filter(r, in); | |
| 187 } | |
| 188 | |
| 189 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) { | |
| 190 | |
| 191 if (ctx->busy) { | |
| 192 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) { | |
| 193 return NGX_ERROR; | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 return ngx_http_next_body_filter(r, in); | |
| 198 } | |
| 199 | |
| 200 /* add the incoming chain to the chain ctx->in */ | |
| 201 | |
| 202 if (in) { | |
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203 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { |
| 1172 | 204 return NGX_ERROR; |
| 205 } | |
| 206 } | |
| 207 | |
| 208 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 209 "http sub filter \"%V\"", &r->uri); | |
| 210 | |
| 211 while (ctx->in || ctx->buf) { | |
| 212 | |
| 213 if (ctx->buf == NULL ){ | |
| 214 ctx->buf = ctx->in->buf; | |
| 215 ctx->in = ctx->in->next; | |
| 216 ctx->pos = ctx->buf->pos; | |
| 217 } | |
| 218 | |
| 219 if (ctx->state == sub_start_state) { | |
| 220 ctx->copy_start = ctx->pos; | |
| 221 ctx->copy_end = ctx->pos; | |
| 222 } | |
| 223 | |
| 224 b = NULL; | |
| 225 | |
| 226 while (ctx->pos < ctx->buf->last) { | |
| 227 | |
| 228 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 229 "saved: %d state: %d", ctx->saved, ctx->state); | |
| 230 | |
| 231 rc = ngx_http_sub_parse(r, ctx); | |
| 232 | |
| 233 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 234 "parse: %d, looked: %d %p-%p", | |
| 235 rc, ctx->looked, ctx->copy_start, ctx->copy_end); | |
| 236 | |
| 237 if (rc == NGX_ERROR) { | |
| 238 return rc; | |
| 239 } | |
| 240 | |
| 241 if (ctx->copy_start != ctx->copy_end) { | |
| 242 | |
| 243 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 244 "saved: %d", ctx->saved); | |
| 245 | |
| 246 if (ctx->saved) { | |
| 247 | |
| 248 if (ctx->free) { | |
| 249 cl = ctx->free; | |
| 250 ctx->free = ctx->free->next; | |
| 251 b = cl->buf; | |
| 252 ngx_memzero(b, sizeof(ngx_buf_t)); | |
| 253 | |
| 254 } else { | |
| 255 b = ngx_calloc_buf(r->pool); | |
| 256 if (b == NULL) { | |
| 257 return NGX_ERROR; | |
| 258 } | |
| 259 | |
| 260 cl = ngx_alloc_chain_link(r->pool); | |
| 261 if (cl == NULL) { | |
| 262 return NGX_ERROR; | |
| 263 } | |
| 264 | |
| 265 cl->buf = b; | |
| 266 } | |
| 267 | |
| 268 b->memory = 1; | |
| 269 b->pos = ctx->match.data; | |
| 270 b->last = ctx->match.data + ctx->saved; | |
| 271 | |
| 272 *ctx->last_out = cl; | |
| 273 ctx->last_out = &cl->next; | |
| 274 | |
| 275 ctx->saved = 0; | |
| 276 } | |
| 277 | |
| 278 if (ctx->free) { | |
| 279 cl = ctx->free; | |
| 280 ctx->free = ctx->free->next; | |
| 281 b = cl->buf; | |
| 282 | |
| 283 } else { | |
| 284 b = ngx_alloc_buf(r->pool); | |
| 285 if (b == NULL) { | |
| 286 return NGX_ERROR; | |
| 287 } | |
| 288 | |
| 289 cl = ngx_alloc_chain_link(r->pool); | |
| 290 if (cl == NULL) { | |
| 291 return NGX_ERROR; | |
| 292 } | |
| 293 | |
| 294 cl->buf = b; | |
| 295 } | |
| 296 | |
| 297 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); | |
| 298 | |
| 299 b->pos = ctx->copy_start; | |
| 300 b->last = ctx->copy_end; | |
| 301 b->shadow = NULL; | |
| 302 b->last_buf = 0; | |
| 303 b->recycled = 0; | |
| 304 | |
| 305 if (b->in_file) { | |
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306 b->file_last = b->file_pos + (b->last - ctx->buf->pos); |
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307 b->file_pos += b->pos - ctx->buf->pos; |
| 1172 | 308 } |
| 309 | |
| 310 cl->next = NULL; | |
| 311 *ctx->last_out = cl; | |
| 312 ctx->last_out = &cl->next; | |
| 313 } | |
| 314 | |
| 315 if (ctx->state == sub_start_state) { | |
| 316 ctx->copy_start = ctx->pos; | |
| 317 ctx->copy_end = ctx->pos; | |
| 318 | |
| 319 } else { | |
| 320 ctx->copy_start = NULL; | |
| 321 ctx->copy_end = NULL; | |
| 322 } | |
| 323 | |
| 324 if (rc == NGX_AGAIN) { | |
| 325 continue; | |
| 326 } | |
| 327 | |
| 328 | |
| 329 /* rc == NGX_OK */ | |
| 330 | |
| 331 b = ngx_calloc_buf(r->pool); | |
| 332 if (b == NULL) { | |
| 333 return NGX_ERROR; | |
| 334 } | |
| 335 | |
| 336 cl = ngx_alloc_chain_link(r->pool); | |
| 337 if (cl == NULL) { | |
| 338 return NGX_ERROR; | |
| 339 } | |
| 340 | |
| 341 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
| 342 | |
| 343 if (ctx->sub.data == NULL) { | |
| 344 | |
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345 if (ngx_http_complex_value(r, &slcf->value, &ctx->sub) |
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346 != NGX_OK) |
| 1172 | 347 { |
| 348 return NGX_ERROR; | |
| 349 } | |
| 350 } | |
| 351 | |
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352 if (ctx->sub.len) { |
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353 b->memory = 1; |
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354 b->pos = ctx->sub.data; |
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355 b->last = ctx->sub.data + ctx->sub.len; |
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356 |
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357 } else { |
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358 b->sync = 1; |
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359 } |
| 1172 | 360 |
| 361 cl->buf = b; | |
| 362 cl->next = NULL; | |
| 363 *ctx->last_out = cl; | |
| 364 ctx->last_out = &cl->next; | |
| 365 | |
| 366 ctx->once = slcf->once; | |
| 367 | |
| 368 continue; | |
| 369 } | |
| 370 | |
| 371 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) { | |
| 372 if (b == NULL) { | |
| 373 if (ctx->free) { | |
| 374 cl = ctx->free; | |
| 375 ctx->free = ctx->free->next; | |
| 376 b = cl->buf; | |
| 377 ngx_memzero(b, sizeof(ngx_buf_t)); | |
| 378 | |
| 379 } else { | |
| 380 b = ngx_calloc_buf(r->pool); | |
| 381 if (b == NULL) { | |
| 382 return NGX_ERROR; | |
| 383 } | |
| 384 | |
| 385 cl = ngx_alloc_chain_link(r->pool); | |
| 386 if (cl == NULL) { | |
| 387 return NGX_ERROR; | |
| 388 } | |
| 389 | |
| 390 cl->buf = b; | |
| 391 } | |
| 392 | |
| 393 b->sync = 1; | |
| 394 | |
| 395 cl->next = NULL; | |
| 396 *ctx->last_out = cl; | |
| 397 ctx->last_out = &cl->next; | |
| 398 } | |
| 399 | |
| 400 b->last_buf = ctx->buf->last_buf; | |
| 401 b->shadow = ctx->buf; | |
| 402 | |
| 403 b->recycled = ctx->buf->recycled; | |
| 404 } | |
| 405 | |
| 406 ctx->buf = NULL; | |
| 407 | |
| 408 ctx->saved = ctx->looked; | |
| 409 } | |
| 410 | |
| 411 if (ctx->out == NULL && ctx->busy == NULL) { | |
| 412 return NGX_OK; | |
| 413 } | |
| 414 | |
| 415 return ngx_http_sub_output(r, ctx); | |
| 416 } | |
| 417 | |
| 418 | |
| 419 static ngx_int_t | |
| 420 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
| 421 { | |
| 422 ngx_int_t rc; | |
| 423 ngx_buf_t *b; | |
| 424 ngx_chain_t *cl; | |
| 425 | |
| 426 #if 1 | |
| 427 b = NULL; | |
| 428 for (cl = ctx->out; cl; cl = cl->next) { | |
| 429 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 430 "sub out: %p %p", cl->buf, cl->buf->pos); | |
| 431 if (cl->buf == b) { | |
| 432 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 433 "the same buf was used in sub"); | |
| 434 ngx_debug_point(); | |
| 435 return NGX_ERROR; | |
| 436 } | |
| 437 b = cl->buf; | |
| 438 } | |
| 439 #endif | |
| 440 | |
| 441 rc = ngx_http_next_body_filter(r, ctx->out); | |
| 442 | |
| 443 if (ctx->busy == NULL) { | |
| 444 ctx->busy = ctx->out; | |
| 445 | |
| 446 } else { | |
| 447 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } | |
| 448 cl->next = ctx->out; | |
| 449 } | |
| 450 | |
| 451 ctx->out = NULL; | |
| 452 ctx->last_out = &ctx->out; | |
| 453 | |
| 454 while (ctx->busy) { | |
| 455 | |
| 456 cl = ctx->busy; | |
| 457 b = cl->buf; | |
| 458 | |
| 459 if (ngx_buf_size(b) != 0) { | |
| 460 break; | |
| 461 } | |
| 462 | |
| 463 if (b->shadow) { | |
| 464 b->shadow->pos = b->shadow->last; | |
| 465 } | |
| 466 | |
| 467 ctx->busy = cl->next; | |
| 468 | |
| 469 if (ngx_buf_in_memory(b) || b->in_file) { | |
| 470 /* add data bufs only to the free buf chain */ | |
| 471 | |
| 472 cl->next = ctx->free; | |
| 473 ctx->free = cl; | |
| 474 } | |
| 475 } | |
| 476 | |
| 477 if (ctx->in || ctx->buf) { | |
| 478 r->buffered |= NGX_HTTP_SUB_BUFFERED; | |
| 479 | |
| 480 } else { | |
| 481 r->buffered &= ~NGX_HTTP_SUB_BUFFERED; | |
| 482 } | |
| 483 | |
| 484 return rc; | |
| 485 } | |
| 486 | |
| 487 | |
| 488 static ngx_int_t | |
| 489 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
| 490 { | |
| 491 u_char *p, *last, *copy_end, ch, match; | |
| 492 size_t looked; | |
| 493 ngx_http_sub_state_e state; | |
| 494 | |
| 495 if (ctx->once) { | |
| 496 ctx->copy_start = ctx->pos; | |
| 497 ctx->copy_end = ctx->buf->last; | |
| 498 ctx->pos = ctx->buf->last; | |
| 499 ctx->looked = 0; | |
| 500 | |
| 501 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once"); | |
| 502 | |
| 503 return NGX_AGAIN; | |
| 504 } | |
| 505 | |
| 506 state = ctx->state; | |
| 507 looked = ctx->looked; | |
| 508 last = ctx->buf->last; | |
| 509 copy_end = ctx->copy_end; | |
| 510 | |
| 511 for (p = ctx->pos; p < last; p++) { | |
| 512 | |
| 513 ch = *p; | |
| 514 ch = ngx_tolower(ch); | |
| 515 | |
| 516 if (state == sub_start_state) { | |
| 517 | |
| 518 /* the tight loop */ | |
| 519 | |
| 520 match = ctx->match.data[0]; | |
| 521 | |
| 522 for ( ;; ) { | |
| 523 if (ch == match) { | |
| 524 copy_end = p; | |
| 525 looked = 1; | |
| 526 state = sub_match_state; | |
| 527 | |
| 528 goto match_started; | |
| 529 } | |
| 530 | |
| 531 if (++p == last) { | |
| 532 break; | |
| 533 } | |
| 534 | |
| 535 ch = *p; | |
| 536 ch = ngx_tolower(ch); | |
| 537 } | |
| 538 | |
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539 ctx->state = state; |
| 1172 | 540 ctx->pos = p; |
| 541 ctx->looked = looked; | |
| 542 ctx->copy_end = p; | |
| 543 | |
| 544 if (ctx->copy_start == NULL) { | |
| 545 ctx->copy_start = ctx->buf->pos; | |
| 546 } | |
| 547 | |
| 548 return NGX_AGAIN; | |
| 549 | |
| 550 match_started: | |
| 551 | |
| 552 continue; | |
| 553 } | |
| 554 | |
| 555 /* state == sub_match_state */ | |
| 556 | |
| 557 if (ch == ctx->match.data[looked]) { | |
| 558 looked++; | |
| 559 | |
| 560 if (looked == ctx->match.len) { | |
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561 if ((size_t) (p - ctx->pos) < looked) { |
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562 ctx->saved = 0; |
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563 } |
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564 |
| 1172 | 565 ctx->state = sub_start_state; |
| 566 ctx->pos = p + 1; | |
| 1978 | 567 ctx->looked = 0; |
| 1172 | 568 ctx->copy_end = copy_end; |
| 569 | |
| 570 if (ctx->copy_start == NULL && copy_end) { | |
| 571 ctx->copy_start = ctx->buf->pos; | |
| 572 } | |
| 573 | |
| 574 return NGX_OK; | |
| 575 } | |
| 576 | |
| 577 } else if (ch == ctx->match.data[0]) { | |
| 578 copy_end = p; | |
| 579 looked = 1; | |
| 580 | |
| 581 } else { | |
| 582 copy_end = p; | |
| 583 looked = 0; | |
| 584 state = sub_start_state; | |
| 585 } | |
| 586 } | |
| 587 | |
| 588 ctx->state = state; | |
| 589 ctx->pos = p; | |
| 590 ctx->looked = looked; | |
| 591 | |
| 592 ctx->copy_end = (state == sub_start_state) ? p : copy_end; | |
| 593 | |
| 594 if (ctx->copy_start == NULL && ctx->copy_end) { | |
| 595 ctx->copy_start = ctx->buf->pos; | |
| 596 } | |
| 597 | |
| 598 return NGX_AGAIN; | |
| 599 } | |
| 600 | |
| 601 | |
| 602 static char * | |
| 603 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 604 { | |
| 605 ngx_http_sub_loc_conf_t *slcf = conf; | |
| 606 | |
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607 ngx_str_t *value; |
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608 ngx_http_compile_complex_value_t ccv; |
| 1172 | 609 |
| 610 if (slcf->match.len) { | |
| 611 return "is duplicate"; | |
| 612 } | |
| 613 | |
| 614 value = cf->args->elts; | |
| 615 | |
| 2135 | 616 ngx_strlow(value[1].data, value[1].data, value[1].len); |
| 1172 | 617 |
| 2135 | 618 slcf->match = value[1]; |
| 1172 | 619 |
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620 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
| 1172 | 621 |
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622 ccv.cf = cf; |
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623 ccv.value = &value[2]; |
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624 ccv.complex_value = &slcf->value; |
| 1172 | 625 |
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626 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
| 1172 | 627 return NGX_CONF_ERROR; |
| 628 } | |
| 629 | |
| 630 return NGX_CONF_OK; | |
| 631 } | |
| 632 | |
| 633 | |
| 634 static void * | |
| 635 ngx_http_sub_create_conf(ngx_conf_t *cf) | |
| 636 { | |
| 637 ngx_http_sub_loc_conf_t *slcf; | |
| 638 | |
| 639 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t)); | |
| 640 if (slcf == NULL) { | |
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641 return NULL; |
| 1172 | 642 } |
| 643 | |
| 644 /* | |
| 645 * set by ngx_pcalloc(): | |
| 646 * | |
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647 * conf->match = { 0, NULL }; |
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648 * conf->sub = { 0, NULL }; |
| 1172 | 649 * conf->sub_lengths = NULL; |
| 650 * conf->sub_values = NULL; | |
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651 * conf->types = { NULL }; |
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652 * conf->types_keys = NULL; |
| 1172 | 653 */ |
| 654 | |
| 655 slcf->once = NGX_CONF_UNSET; | |
| 656 | |
| 657 return slcf; | |
| 658 } | |
| 659 | |
| 660 | |
| 661 static char * | |
| 662 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 663 { | |
| 664 ngx_http_sub_loc_conf_t *prev = parent; | |
| 665 ngx_http_sub_loc_conf_t *conf = child; | |
| 666 | |
| 667 ngx_conf_merge_value(conf->once, prev->once, 1); | |
| 668 ngx_conf_merge_str_value(conf->match, prev->match, ""); | |
| 669 | |
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670 if (conf->value.value.len == 0) { |
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671 conf->value = prev->value; |
| 1172 | 672 } |
| 673 | |
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674 if (ngx_http_merge_types(cf, conf->types_keys, &conf->types, |
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675 prev->types_keys, &prev->types, |
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676 ngx_http_html_default_types) |
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677 != NGX_OK) |
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678 { |
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679 return NGX_CONF_ERROR; |
| 1172 | 680 } |
| 681 | |
| 682 return NGX_CONF_OK; | |
| 683 } | |
| 684 | |
| 685 | |
| 686 static ngx_int_t | |
| 687 ngx_http_sub_filter_init(ngx_conf_t *cf) | |
| 688 { | |
| 689 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 690 ngx_http_top_header_filter = ngx_http_sub_header_filter; | |
| 691 | |
| 692 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 693 ngx_http_top_body_filter = ngx_http_sub_body_filter; | |
| 694 | |
| 695 return NGX_OK; | |
| 696 } |