Mercurial > hg > nginx
annotate src/http/modules/ngx_http_sub_filter_module.c @ 2536:a6d6d762c554
small optimization: " == NGX_ERROR" > " != NGX_OK"
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 24 Feb 2009 10:42:23 +0000 |
| parents | cc13ff6d5c07 |
| children | a6954ce88b80 |
| 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 { | |
| 13 ngx_str_t match; | |
| 14 ngx_str_t sub; | |
| 15 | |
|
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16 ngx_hash_t types; |
| 1172 | 17 |
| 18 ngx_array_t *sub_lengths; | |
| 19 ngx_array_t *sub_values; | |
| 20 | |
| 21 ngx_flag_t once; | |
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22 |
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23 ngx_array_t *types_keys; |
| 1172 | 24 } ngx_http_sub_loc_conf_t; |
| 25 | |
| 26 | |
| 27 typedef enum { | |
| 28 sub_start_state = 0, | |
| 29 sub_match_state, | |
| 30 } ngx_http_sub_state_e; | |
| 31 | |
| 32 | |
| 33 typedef struct { | |
| 34 ngx_str_t match; | |
| 35 | |
| 36 ngx_uint_t once; /* unsigned once:1 */ | |
| 37 | |
| 38 ngx_buf_t *buf; | |
| 39 | |
| 40 u_char *pos; | |
| 41 u_char *copy_start; | |
| 42 u_char *copy_end; | |
| 43 | |
| 44 ngx_chain_t *in; | |
| 45 ngx_chain_t *out; | |
| 46 ngx_chain_t **last_out; | |
| 47 ngx_chain_t *busy; | |
| 48 ngx_chain_t *free; | |
| 49 | |
| 50 ngx_str_t sub; | |
| 51 | |
| 52 ngx_uint_t state; | |
| 53 size_t saved; | |
| 54 size_t looked; | |
| 55 } ngx_http_sub_ctx_t; | |
| 56 | |
| 57 | |
| 58 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r, | |
| 59 ngx_http_sub_ctx_t *ctx); | |
| 60 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r, | |
| 61 ngx_http_sub_ctx_t *ctx); | |
| 62 | |
| 63 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 64 void *conf); | |
| 65 static void *ngx_http_sub_create_conf(ngx_conf_t *cf); | |
| 66 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf, | |
| 67 void *parent, void *child); | |
| 68 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf); | |
| 69 | |
| 70 | |
| 71 static ngx_command_t ngx_http_sub_filter_commands[] = { | |
| 72 | |
| 73 { ngx_string("sub_filter"), | |
| 74 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
| 75 ngx_http_sub_filter, | |
| 76 NGX_HTTP_LOC_CONF_OFFSET, | |
| 77 0, | |
| 78 NULL }, | |
| 79 | |
| 80 { ngx_string("sub_filter_types"), | |
| 81 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, | |
|
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82 ngx_http_types_slot, |
| 1172 | 83 NGX_HTTP_LOC_CONF_OFFSET, |
|
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84 offsetof(ngx_http_sub_loc_conf_t, types_keys), |
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parents:
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diff
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85 &ngx_http_html_default_types[0] }, |
| 1172 | 86 |
| 87 { ngx_string("sub_filter_once"), | |
| 88 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
| 89 ngx_conf_set_flag_slot, | |
| 90 NGX_HTTP_LOC_CONF_OFFSET, | |
| 91 offsetof(ngx_http_sub_loc_conf_t, once), | |
| 92 NULL }, | |
| 93 | |
| 94 ngx_null_command | |
| 95 }; | |
| 96 | |
| 97 | |
| 98 static ngx_http_module_t ngx_http_sub_filter_module_ctx = { | |
| 99 NULL, /* preconfiguration */ | |
| 100 ngx_http_sub_filter_init, /* postconfiguration */ | |
| 101 | |
| 102 NULL, /* create main configuration */ | |
| 103 NULL, /* init main configuration */ | |
| 104 | |
| 105 NULL, /* create server configuration */ | |
| 106 NULL, /* merge server configuration */ | |
| 107 | |
| 108 ngx_http_sub_create_conf, /* create location configuration */ | |
| 109 ngx_http_sub_merge_conf /* merge location configuration */ | |
| 110 }; | |
| 111 | |
| 112 | |
| 113 ngx_module_t ngx_http_sub_filter_module = { | |
| 114 NGX_MODULE_V1, | |
| 115 &ngx_http_sub_filter_module_ctx, /* module context */ | |
| 116 ngx_http_sub_filter_commands, /* module directives */ | |
| 117 NGX_HTTP_MODULE, /* module type */ | |
| 118 NULL, /* init master */ | |
| 119 NULL, /* init module */ | |
| 120 NULL, /* init process */ | |
| 121 NULL, /* init thread */ | |
| 122 NULL, /* exit thread */ | |
| 123 NULL, /* exit process */ | |
| 124 NULL, /* exit master */ | |
| 125 NGX_MODULE_V1_PADDING | |
| 126 }; | |
| 127 | |
| 128 | |
| 129 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 130 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 131 | |
| 132 | |
| 133 static ngx_int_t | |
| 134 ngx_http_sub_header_filter(ngx_http_request_t *r) | |
| 135 { | |
| 136 ngx_http_sub_ctx_t *ctx; | |
| 137 ngx_http_sub_loc_conf_t *slcf; | |
| 138 | |
| 139 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
| 140 | |
| 141 if (slcf->match.len == 0 | |
|
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142 || r->headers_out.content_length_n == 0 |
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parents:
2135
diff
changeset
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143 || ngx_http_test_content_type(r, &slcf->types) == NULL) |
| 1172 | 144 { |
| 145 return ngx_http_next_header_filter(r); | |
| 146 } | |
| 147 | |
| 148 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t)); | |
| 149 if (ctx == NULL) { | |
| 150 return NGX_ERROR; | |
| 151 } | |
| 152 | |
| 153 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module); | |
| 154 | |
| 155 ctx->match = slcf->match; | |
| 156 ctx->last_out = &ctx->out; | |
| 157 ctx->sub = slcf->sub; | |
| 158 | |
| 159 r->filter_need_in_memory = 1; | |
| 160 | |
| 161 if (r == r->main) { | |
| 162 ngx_http_clear_content_length(r); | |
| 163 ngx_http_clear_last_modified(r); | |
| 164 } | |
| 165 | |
| 166 return ngx_http_next_header_filter(r); | |
| 167 } | |
| 168 | |
| 169 | |
| 170 static ngx_int_t | |
| 171 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 172 { | |
| 173 ngx_int_t rc; | |
| 174 ngx_buf_t *b; | |
| 175 ngx_chain_t *cl; | |
| 176 ngx_http_sub_ctx_t *ctx; | |
| 177 ngx_http_sub_loc_conf_t *slcf; | |
| 178 | |
| 179 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module); | |
| 180 | |
| 181 if (ctx == NULL) { | |
| 182 return ngx_http_next_body_filter(r, in); | |
| 183 } | |
| 184 | |
| 185 if ((in == NULL | |
| 186 && ctx->buf == NULL | |
| 187 && ctx->in == NULL | |
| 188 && ctx->busy == NULL)) | |
| 189 { | |
| 190 return ngx_http_next_body_filter(r, in); | |
| 191 } | |
| 192 | |
| 193 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) { | |
| 194 | |
| 195 if (ctx->busy) { | |
| 196 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) { | |
| 197 return NGX_ERROR; | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 return ngx_http_next_body_filter(r, in); | |
| 202 } | |
| 203 | |
| 204 /* add the incoming chain to the chain ctx->in */ | |
| 205 | |
| 206 if (in) { | |
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207 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { |
| 1172 | 208 return NGX_ERROR; |
| 209 } | |
| 210 } | |
| 211 | |
| 212 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 213 "http sub filter \"%V\"", &r->uri); | |
| 214 | |
| 215 while (ctx->in || ctx->buf) { | |
| 216 | |
| 217 if (ctx->buf == NULL ){ | |
| 218 ctx->buf = ctx->in->buf; | |
| 219 ctx->in = ctx->in->next; | |
| 220 ctx->pos = ctx->buf->pos; | |
| 221 } | |
| 222 | |
| 223 if (ctx->state == sub_start_state) { | |
| 224 ctx->copy_start = ctx->pos; | |
| 225 ctx->copy_end = ctx->pos; | |
| 226 } | |
| 227 | |
| 228 b = NULL; | |
| 229 | |
| 230 while (ctx->pos < ctx->buf->last) { | |
| 231 | |
| 232 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 233 "saved: %d state: %d", ctx->saved, ctx->state); | |
| 234 | |
| 235 rc = ngx_http_sub_parse(r, ctx); | |
| 236 | |
| 237 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 238 "parse: %d, looked: %d %p-%p", | |
| 239 rc, ctx->looked, ctx->copy_start, ctx->copy_end); | |
| 240 | |
| 241 if (rc == NGX_ERROR) { | |
| 242 return rc; | |
| 243 } | |
| 244 | |
| 245 if (ctx->copy_start != ctx->copy_end) { | |
| 246 | |
| 247 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 248 "saved: %d", ctx->saved); | |
| 249 | |
| 250 if (ctx->saved) { | |
| 251 | |
| 252 if (ctx->free) { | |
| 253 cl = ctx->free; | |
| 254 ctx->free = ctx->free->next; | |
| 255 b = cl->buf; | |
| 256 ngx_memzero(b, sizeof(ngx_buf_t)); | |
| 257 | |
| 258 } else { | |
| 259 b = ngx_calloc_buf(r->pool); | |
| 260 if (b == NULL) { | |
| 261 return NGX_ERROR; | |
| 262 } | |
| 263 | |
| 264 cl = ngx_alloc_chain_link(r->pool); | |
| 265 if (cl == NULL) { | |
| 266 return NGX_ERROR; | |
| 267 } | |
| 268 | |
| 269 cl->buf = b; | |
| 270 } | |
| 271 | |
| 272 b->memory = 1; | |
| 273 b->pos = ctx->match.data; | |
| 274 b->last = ctx->match.data + ctx->saved; | |
| 275 | |
| 276 *ctx->last_out = cl; | |
| 277 ctx->last_out = &cl->next; | |
| 278 | |
| 279 ctx->saved = 0; | |
| 280 } | |
| 281 | |
| 282 if (ctx->free) { | |
| 283 cl = ctx->free; | |
| 284 ctx->free = ctx->free->next; | |
| 285 b = cl->buf; | |
| 286 | |
| 287 } else { | |
| 288 b = ngx_alloc_buf(r->pool); | |
| 289 if (b == NULL) { | |
| 290 return NGX_ERROR; | |
| 291 } | |
| 292 | |
| 293 cl = ngx_alloc_chain_link(r->pool); | |
| 294 if (cl == NULL) { | |
| 295 return NGX_ERROR; | |
| 296 } | |
| 297 | |
| 298 cl->buf = b; | |
| 299 } | |
| 300 | |
| 301 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); | |
| 302 | |
| 303 b->pos = ctx->copy_start; | |
| 304 b->last = ctx->copy_end; | |
| 305 b->shadow = NULL; | |
| 306 b->last_buf = 0; | |
| 307 b->recycled = 0; | |
| 308 | |
| 309 if (b->in_file) { | |
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310 b->file_last = b->file_pos + (b->last - ctx->buf->pos); |
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311 b->file_pos += b->pos - ctx->buf->pos; |
| 1172 | 312 } |
| 313 | |
| 314 cl->next = NULL; | |
| 315 *ctx->last_out = cl; | |
| 316 ctx->last_out = &cl->next; | |
| 317 } | |
| 318 | |
| 319 if (ctx->state == sub_start_state) { | |
| 320 ctx->copy_start = ctx->pos; | |
| 321 ctx->copy_end = ctx->pos; | |
| 322 | |
| 323 } else { | |
| 324 ctx->copy_start = NULL; | |
| 325 ctx->copy_end = NULL; | |
| 326 } | |
| 327 | |
| 328 if (rc == NGX_AGAIN) { | |
| 329 continue; | |
| 330 } | |
| 331 | |
| 332 | |
| 333 /* rc == NGX_OK */ | |
| 334 | |
| 335 b = ngx_calloc_buf(r->pool); | |
| 336 if (b == NULL) { | |
| 337 return NGX_ERROR; | |
| 338 } | |
| 339 | |
| 340 cl = ngx_alloc_chain_link(r->pool); | |
| 341 if (cl == NULL) { | |
| 342 return NGX_ERROR; | |
| 343 } | |
| 344 | |
| 345 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
| 346 | |
| 347 if (ctx->sub.data == NULL) { | |
| 348 | |
| 349 if (ngx_http_script_run(r, &ctx->sub, slcf->sub_lengths->elts, | |
| 350 0, slcf->sub_values->elts) | |
| 351 == NULL) | |
| 352 { | |
| 353 return NGX_ERROR; | |
| 354 } | |
| 355 } | |
| 356 | |
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357 if (ctx->sub.len) { |
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358 b->memory = 1; |
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359 b->pos = ctx->sub.data; |
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360 b->last = ctx->sub.data + ctx->sub.len; |
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361 |
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362 } else { |
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363 b->sync = 1; |
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364 } |
| 1172 | 365 |
| 366 cl->buf = b; | |
| 367 cl->next = NULL; | |
| 368 *ctx->last_out = cl; | |
| 369 ctx->last_out = &cl->next; | |
| 370 | |
| 371 ctx->once = slcf->once; | |
| 372 | |
| 373 continue; | |
| 374 } | |
| 375 | |
| 376 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) { | |
| 377 if (b == NULL) { | |
| 378 if (ctx->free) { | |
| 379 cl = ctx->free; | |
| 380 ctx->free = ctx->free->next; | |
| 381 b = cl->buf; | |
| 382 ngx_memzero(b, sizeof(ngx_buf_t)); | |
| 383 | |
| 384 } else { | |
| 385 b = ngx_calloc_buf(r->pool); | |
| 386 if (b == NULL) { | |
| 387 return NGX_ERROR; | |
| 388 } | |
| 389 | |
| 390 cl = ngx_alloc_chain_link(r->pool); | |
| 391 if (cl == NULL) { | |
| 392 return NGX_ERROR; | |
| 393 } | |
| 394 | |
| 395 cl->buf = b; | |
| 396 } | |
| 397 | |
| 398 b->sync = 1; | |
| 399 | |
| 400 cl->next = NULL; | |
| 401 *ctx->last_out = cl; | |
| 402 ctx->last_out = &cl->next; | |
| 403 } | |
| 404 | |
| 405 b->last_buf = ctx->buf->last_buf; | |
| 406 b->shadow = ctx->buf; | |
| 407 | |
| 408 b->recycled = ctx->buf->recycled; | |
| 409 } | |
| 410 | |
| 411 ctx->buf = NULL; | |
| 412 | |
| 413 ctx->saved = ctx->looked; | |
| 414 } | |
| 415 | |
| 416 if (ctx->out == NULL && ctx->busy == NULL) { | |
| 417 return NGX_OK; | |
| 418 } | |
| 419 | |
| 420 return ngx_http_sub_output(r, ctx); | |
| 421 } | |
| 422 | |
| 423 | |
| 424 static ngx_int_t | |
| 425 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
| 426 { | |
| 427 ngx_int_t rc; | |
| 428 ngx_buf_t *b; | |
| 429 ngx_chain_t *cl; | |
| 430 | |
| 431 #if 1 | |
| 432 b = NULL; | |
| 433 for (cl = ctx->out; cl; cl = cl->next) { | |
| 434 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 435 "sub out: %p %p", cl->buf, cl->buf->pos); | |
| 436 if (cl->buf == b) { | |
| 437 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 438 "the same buf was used in sub"); | |
| 439 ngx_debug_point(); | |
| 440 return NGX_ERROR; | |
| 441 } | |
| 442 b = cl->buf; | |
| 443 } | |
| 444 #endif | |
| 445 | |
| 446 rc = ngx_http_next_body_filter(r, ctx->out); | |
| 447 | |
| 448 if (ctx->busy == NULL) { | |
| 449 ctx->busy = ctx->out; | |
| 450 | |
| 451 } else { | |
| 452 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } | |
| 453 cl->next = ctx->out; | |
| 454 } | |
| 455 | |
| 456 ctx->out = NULL; | |
| 457 ctx->last_out = &ctx->out; | |
| 458 | |
| 459 while (ctx->busy) { | |
| 460 | |
| 461 cl = ctx->busy; | |
| 462 b = cl->buf; | |
| 463 | |
| 464 if (ngx_buf_size(b) != 0) { | |
| 465 break; | |
| 466 } | |
| 467 | |
| 468 if (b->shadow) { | |
| 469 b->shadow->pos = b->shadow->last; | |
| 470 } | |
| 471 | |
| 472 ctx->busy = cl->next; | |
| 473 | |
| 474 if (ngx_buf_in_memory(b) || b->in_file) { | |
| 475 /* add data bufs only to the free buf chain */ | |
| 476 | |
| 477 cl->next = ctx->free; | |
| 478 ctx->free = cl; | |
| 479 } | |
| 480 } | |
| 481 | |
| 482 if (ctx->in || ctx->buf) { | |
| 483 r->buffered |= NGX_HTTP_SUB_BUFFERED; | |
| 484 | |
| 485 } else { | |
| 486 r->buffered &= ~NGX_HTTP_SUB_BUFFERED; | |
| 487 } | |
| 488 | |
| 489 return rc; | |
| 490 } | |
| 491 | |
| 492 | |
| 493 static ngx_int_t | |
| 494 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
| 495 { | |
| 496 u_char *p, *last, *copy_end, ch, match; | |
| 497 size_t looked; | |
| 498 ngx_http_sub_state_e state; | |
| 499 | |
| 500 if (ctx->once) { | |
| 501 ctx->copy_start = ctx->pos; | |
| 502 ctx->copy_end = ctx->buf->last; | |
| 503 ctx->pos = ctx->buf->last; | |
| 504 ctx->looked = 0; | |
| 505 | |
| 506 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once"); | |
| 507 | |
| 508 return NGX_AGAIN; | |
| 509 } | |
| 510 | |
| 511 state = ctx->state; | |
| 512 looked = ctx->looked; | |
| 513 last = ctx->buf->last; | |
| 514 copy_end = ctx->copy_end; | |
| 515 | |
| 516 for (p = ctx->pos; p < last; p++) { | |
| 517 | |
| 518 ch = *p; | |
| 519 ch = ngx_tolower(ch); | |
| 520 | |
| 521 if (state == sub_start_state) { | |
| 522 | |
| 523 /* the tight loop */ | |
| 524 | |
| 525 match = ctx->match.data[0]; | |
| 526 | |
| 527 for ( ;; ) { | |
| 528 if (ch == match) { | |
| 529 copy_end = p; | |
| 530 looked = 1; | |
| 531 state = sub_match_state; | |
| 532 | |
| 533 goto match_started; | |
| 534 } | |
| 535 | |
| 536 if (++p == last) { | |
| 537 break; | |
| 538 } | |
| 539 | |
| 540 ch = *p; | |
| 541 ch = ngx_tolower(ch); | |
| 542 } | |
| 543 | |
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544 ctx->state = state; |
| 1172 | 545 ctx->pos = p; |
| 546 ctx->looked = looked; | |
| 547 ctx->copy_end = p; | |
| 548 | |
| 549 if (ctx->copy_start == NULL) { | |
| 550 ctx->copy_start = ctx->buf->pos; | |
| 551 } | |
| 552 | |
| 553 return NGX_AGAIN; | |
| 554 | |
| 555 match_started: | |
| 556 | |
| 557 continue; | |
| 558 } | |
| 559 | |
| 560 /* state == sub_match_state */ | |
| 561 | |
| 562 if (ch == ctx->match.data[looked]) { | |
| 563 looked++; | |
| 564 | |
| 565 if (looked == ctx->match.len) { | |
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566 if ((size_t) (p - ctx->pos) < looked) { |
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567 ctx->saved = 0; |
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568 } |
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569 |
| 1172 | 570 ctx->state = sub_start_state; |
| 571 ctx->pos = p + 1; | |
| 1978 | 572 ctx->looked = 0; |
| 1172 | 573 ctx->copy_end = copy_end; |
| 574 | |
| 575 if (ctx->copy_start == NULL && copy_end) { | |
| 576 ctx->copy_start = ctx->buf->pos; | |
| 577 } | |
| 578 | |
| 579 return NGX_OK; | |
| 580 } | |
| 581 | |
| 582 } else if (ch == ctx->match.data[0]) { | |
| 583 copy_end = p; | |
| 584 looked = 1; | |
| 585 | |
| 586 } else { | |
| 587 copy_end = p; | |
| 588 looked = 0; | |
| 589 state = sub_start_state; | |
| 590 } | |
| 591 } | |
| 592 | |
| 593 ctx->state = state; | |
| 594 ctx->pos = p; | |
| 595 ctx->looked = looked; | |
| 596 | |
| 597 ctx->copy_end = (state == sub_start_state) ? p : copy_end; | |
| 598 | |
| 599 if (ctx->copy_start == NULL && ctx->copy_end) { | |
| 600 ctx->copy_start = ctx->buf->pos; | |
| 601 } | |
| 602 | |
| 603 return NGX_AGAIN; | |
| 604 } | |
| 605 | |
| 606 | |
| 607 static char * | |
| 608 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 609 { | |
| 610 ngx_http_sub_loc_conf_t *slcf = conf; | |
| 611 | |
| 612 ngx_str_t *value; | |
| 613 ngx_int_t n; | |
| 614 ngx_http_script_compile_t sc; | |
| 615 | |
| 616 if (slcf->match.len) { | |
| 617 return "is duplicate"; | |
| 618 } | |
| 619 | |
| 620 value = cf->args->elts; | |
| 621 | |
| 2135 | 622 ngx_strlow(value[1].data, value[1].data, value[1].len); |
| 1172 | 623 |
| 2135 | 624 slcf->match = value[1]; |
| 1172 | 625 |
| 626 n = ngx_http_script_variables_count(&value[2]); | |
| 627 | |
| 628 if (n == 0) { | |
| 629 slcf->sub = value[2]; | |
| 630 return NGX_CONF_OK; | |
| 631 } | |
| 632 | |
| 633 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
| 634 | |
| 635 sc.cf = cf; | |
| 636 sc.source = &value[2]; | |
| 637 sc.lengths = &slcf->sub_lengths; | |
| 638 sc.values = &slcf->sub_values; | |
| 639 sc.variables = n; | |
| 640 sc.complete_lengths = 1; | |
| 641 sc.complete_values = 1; | |
| 642 | |
| 643 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
| 644 return NGX_CONF_ERROR; | |
| 645 } | |
| 646 | |
| 647 return NGX_CONF_OK; | |
| 648 } | |
| 649 | |
| 650 | |
| 651 static void * | |
| 652 ngx_http_sub_create_conf(ngx_conf_t *cf) | |
| 653 { | |
| 654 ngx_http_sub_loc_conf_t *slcf; | |
| 655 | |
| 656 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t)); | |
| 657 if (slcf == NULL) { | |
| 658 return NGX_CONF_ERROR; | |
| 659 } | |
| 660 | |
| 661 /* | |
| 662 * set by ngx_pcalloc(): | |
| 663 * | |
|
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664 * conf->match = { 0, NULL }; |
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665 * conf->sub = { 0, NULL }; |
| 1172 | 666 * conf->sub_lengths = NULL; |
| 667 * conf->sub_values = NULL; | |
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668 * conf->types = { NULL }; |
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669 * conf->types_keys = NULL; |
| 1172 | 670 */ |
| 671 | |
| 672 slcf->once = NGX_CONF_UNSET; | |
| 673 | |
| 674 return slcf; | |
| 675 } | |
| 676 | |
| 677 | |
| 678 static char * | |
| 679 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 680 { | |
| 681 ngx_http_sub_loc_conf_t *prev = parent; | |
| 682 ngx_http_sub_loc_conf_t *conf = child; | |
| 683 | |
| 684 ngx_conf_merge_value(conf->once, prev->once, 1); | |
| 685 ngx_conf_merge_str_value(conf->match, prev->match, ""); | |
| 686 | |
| 687 if (conf->sub.data == NULL && conf->sub_lengths == NULL) { | |
| 688 conf->sub = prev->sub; | |
| 689 conf->sub_lengths = prev->sub_lengths; | |
| 690 conf->sub_values = prev->sub_values; | |
| 691 } | |
| 692 | |
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693 if (ngx_http_merge_types(cf, conf->types_keys, &conf->types, |
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694 prev->types_keys, &prev->types, |
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695 ngx_http_html_default_types) |
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696 != NGX_OK) |
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697 { |
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698 return NGX_CONF_ERROR; |
| 1172 | 699 } |
| 700 | |
| 701 return NGX_CONF_OK; | |
| 702 } | |
| 703 | |
| 704 | |
| 705 static ngx_int_t | |
| 706 ngx_http_sub_filter_init(ngx_conf_t *cf) | |
| 707 { | |
| 708 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 709 ngx_http_top_header_filter = ngx_http_sub_header_filter; | |
| 710 | |
| 711 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 712 ngx_http_top_body_filter = ngx_http_sub_body_filter; | |
| 713 | |
| 714 return NGX_OK; | |
| 715 } |