Mercurial > hg > nginx
annotate src/http/modules/ngx_http_sub_filter_module.c @ 1557:9d094e581587
*) add sub_filter parser fix similar to r1261 in SSI parser
*) fix case when pattern is split between two buffers:
it had been fixed in SSI parser long ago
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 02 Oct 2007 18:53:31 +0000 |
| parents | 76fe59c6fafb |
| children | c10e7b563fb4 |
| 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 | |
| 16 ngx_array_t *types; /* array of ngx_str_t */ | |
| 17 | |
| 18 ngx_array_t *sub_lengths; | |
| 19 ngx_array_t *sub_values; | |
| 20 | |
| 21 ngx_flag_t once; | |
| 22 } ngx_http_sub_loc_conf_t; | |
| 23 | |
| 24 | |
| 25 typedef enum { | |
| 26 sub_start_state = 0, | |
| 27 sub_match_state, | |
| 28 } ngx_http_sub_state_e; | |
| 29 | |
| 30 | |
| 31 typedef struct { | |
| 32 ngx_str_t match; | |
| 33 | |
| 34 ngx_uint_t once; /* unsigned once:1 */ | |
| 35 | |
| 36 ngx_buf_t *buf; | |
| 37 | |
| 38 u_char *pos; | |
| 39 u_char *copy_start; | |
| 40 u_char *copy_end; | |
| 41 | |
| 42 ngx_chain_t *in; | |
| 43 ngx_chain_t *out; | |
| 44 ngx_chain_t **last_out; | |
| 45 ngx_chain_t *busy; | |
| 46 ngx_chain_t *free; | |
| 47 | |
| 48 ngx_str_t sub; | |
| 49 | |
| 50 ngx_uint_t state; | |
| 51 size_t saved; | |
| 52 size_t looked; | |
| 53 } ngx_http_sub_ctx_t; | |
| 54 | |
| 55 | |
| 56 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r, | |
| 57 ngx_http_sub_ctx_t *ctx); | |
| 58 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r, | |
| 59 ngx_http_sub_ctx_t *ctx); | |
| 60 | |
| 61 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 62 void *conf); | |
| 63 static char *ngx_http_sub_types(ngx_conf_t *cf, ngx_command_t *cmd, 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, | |
| 81 ngx_http_sub_types, | |
| 82 NGX_HTTP_LOC_CONF_OFFSET, | |
| 83 0, | |
| 84 NULL }, | |
| 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 | |
| 93 ngx_null_command | |
| 94 }; | |
| 95 | |
| 96 | |
| 97 static ngx_http_module_t ngx_http_sub_filter_module_ctx = { | |
| 98 NULL, /* preconfiguration */ | |
| 99 ngx_http_sub_filter_init, /* postconfiguration */ | |
| 100 | |
| 101 NULL, /* create main configuration */ | |
| 102 NULL, /* init main configuration */ | |
| 103 | |
| 104 NULL, /* create server configuration */ | |
| 105 NULL, /* merge server configuration */ | |
| 106 | |
| 107 ngx_http_sub_create_conf, /* create location configuration */ | |
| 108 ngx_http_sub_merge_conf /* merge location configuration */ | |
| 109 }; | |
| 110 | |
| 111 | |
| 112 ngx_module_t ngx_http_sub_filter_module = { | |
| 113 NGX_MODULE_V1, | |
| 114 &ngx_http_sub_filter_module_ctx, /* module context */ | |
| 115 ngx_http_sub_filter_commands, /* module directives */ | |
| 116 NGX_HTTP_MODULE, /* module type */ | |
| 117 NULL, /* init master */ | |
| 118 NULL, /* init module */ | |
| 119 NULL, /* init process */ | |
| 120 NULL, /* init thread */ | |
| 121 NULL, /* exit thread */ | |
| 122 NULL, /* exit process */ | |
| 123 NULL, /* exit master */ | |
| 124 NGX_MODULE_V1_PADDING | |
| 125 }; | |
| 126 | |
| 127 | |
| 128 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 129 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 130 | |
| 131 | |
| 132 static ngx_int_t | |
| 133 ngx_http_sub_header_filter(ngx_http_request_t *r) | |
| 134 { | |
| 135 ngx_str_t *type; | |
| 136 ngx_uint_t i; | |
| 137 ngx_http_sub_ctx_t *ctx; | |
| 138 ngx_http_sub_loc_conf_t *slcf; | |
| 139 | |
| 140 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
| 141 | |
| 142 if (slcf->match.len == 0 | |
| 143 || r->headers_out.content_type.len == 0 | |
| 144 || r->headers_out.content_length_n == 0) | |
| 145 { | |
| 146 return ngx_http_next_header_filter(r); | |
| 147 } | |
| 148 | |
| 149 type = slcf->types->elts; | |
| 150 for (i = 0; i < slcf->types->nelts; i++) { | |
| 151 if (r->headers_out.content_type.len >= type[i].len | |
| 152 && ngx_strncasecmp(r->headers_out.content_type.data, | |
| 153 type[i].data, type[i].len) == 0) | |
| 154 { | |
| 155 goto found; | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 return ngx_http_next_header_filter(r); | |
| 160 | |
| 161 found: | |
| 162 | |
| 163 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t)); | |
| 164 if (ctx == NULL) { | |
| 165 return NGX_ERROR; | |
| 166 } | |
| 167 | |
| 168 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module); | |
| 169 | |
| 170 ctx->match = slcf->match; | |
| 171 ctx->last_out = &ctx->out; | |
| 172 ctx->sub = slcf->sub; | |
| 173 | |
| 174 r->filter_need_in_memory = 1; | |
| 175 | |
| 176 if (r == r->main) { | |
| 177 ngx_http_clear_content_length(r); | |
| 178 ngx_http_clear_last_modified(r); | |
| 179 } | |
| 180 | |
| 181 return ngx_http_next_header_filter(r); | |
| 182 } | |
| 183 | |
| 184 | |
| 185 static ngx_int_t | |
| 186 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 187 { | |
| 188 ngx_int_t rc; | |
| 189 ngx_buf_t *b; | |
| 190 ngx_chain_t *cl; | |
| 191 ngx_http_sub_ctx_t *ctx; | |
| 192 ngx_http_sub_loc_conf_t *slcf; | |
| 193 | |
| 194 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module); | |
| 195 | |
| 196 if (ctx == NULL) { | |
| 197 return ngx_http_next_body_filter(r, in); | |
| 198 } | |
| 199 | |
| 200 if ((in == NULL | |
| 201 && ctx->buf == NULL | |
| 202 && ctx->in == NULL | |
| 203 && ctx->busy == NULL)) | |
| 204 { | |
| 205 return ngx_http_next_body_filter(r, in); | |
| 206 } | |
| 207 | |
| 208 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) { | |
| 209 | |
| 210 if (ctx->busy) { | |
| 211 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) { | |
| 212 return NGX_ERROR; | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 return ngx_http_next_body_filter(r, in); | |
| 217 } | |
| 218 | |
| 219 /* add the incoming chain to the chain ctx->in */ | |
| 220 | |
| 221 if (in) { | |
| 222 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) { | |
| 223 return NGX_ERROR; | |
| 224 } | |
| 225 } | |
| 226 | |
| 227 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 228 "http sub filter \"%V\"", &r->uri); | |
| 229 | |
| 230 while (ctx->in || ctx->buf) { | |
| 231 | |
| 232 if (ctx->buf == NULL ){ | |
| 233 ctx->buf = ctx->in->buf; | |
| 234 ctx->in = ctx->in->next; | |
| 235 ctx->pos = ctx->buf->pos; | |
| 236 } | |
| 237 | |
| 238 if (ctx->state == sub_start_state) { | |
| 239 ctx->copy_start = ctx->pos; | |
| 240 ctx->copy_end = ctx->pos; | |
| 241 } | |
| 242 | |
| 243 b = NULL; | |
| 244 | |
| 245 while (ctx->pos < ctx->buf->last) { | |
| 246 | |
| 247 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 248 "saved: %d state: %d", ctx->saved, ctx->state); | |
| 249 | |
| 250 rc = ngx_http_sub_parse(r, ctx); | |
| 251 | |
| 252 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 253 "parse: %d, looked: %d %p-%p", | |
| 254 rc, ctx->looked, ctx->copy_start, ctx->copy_end); | |
| 255 | |
| 256 if (rc == NGX_ERROR) { | |
| 257 return rc; | |
| 258 } | |
| 259 | |
| 260 if (ctx->copy_start != ctx->copy_end) { | |
| 261 | |
| 262 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 263 "saved: %d", ctx->saved); | |
| 264 | |
| 265 if (ctx->saved) { | |
| 266 | |
| 267 if (ctx->free) { | |
| 268 cl = ctx->free; | |
| 269 ctx->free = ctx->free->next; | |
| 270 b = cl->buf; | |
| 271 ngx_memzero(b, sizeof(ngx_buf_t)); | |
| 272 | |
| 273 } else { | |
| 274 b = ngx_calloc_buf(r->pool); | |
| 275 if (b == NULL) { | |
| 276 return NGX_ERROR; | |
| 277 } | |
| 278 | |
| 279 cl = ngx_alloc_chain_link(r->pool); | |
| 280 if (cl == NULL) { | |
| 281 return NGX_ERROR; | |
| 282 } | |
| 283 | |
| 284 cl->buf = b; | |
| 285 } | |
| 286 | |
| 287 b->memory = 1; | |
| 288 b->pos = ctx->match.data; | |
| 289 b->last = ctx->match.data + ctx->saved; | |
| 290 | |
| 291 *ctx->last_out = cl; | |
| 292 ctx->last_out = &cl->next; | |
| 293 | |
| 294 ctx->saved = 0; | |
| 295 } | |
| 296 | |
| 297 if (ctx->free) { | |
| 298 cl = ctx->free; | |
| 299 ctx->free = ctx->free->next; | |
| 300 b = cl->buf; | |
| 301 | |
| 302 } else { | |
| 303 b = ngx_alloc_buf(r->pool); | |
| 304 if (b == NULL) { | |
| 305 return NGX_ERROR; | |
| 306 } | |
| 307 | |
| 308 cl = ngx_alloc_chain_link(r->pool); | |
| 309 if (cl == NULL) { | |
| 310 return NGX_ERROR; | |
| 311 } | |
| 312 | |
| 313 cl->buf = b; | |
| 314 } | |
| 315 | |
| 316 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); | |
| 317 | |
| 318 b->pos = ctx->copy_start; | |
| 319 b->last = ctx->copy_end; | |
| 320 b->shadow = NULL; | |
| 321 b->last_buf = 0; | |
| 322 b->recycled = 0; | |
| 323 | |
| 324 if (b->in_file) { | |
| 325 b->file_last = b->file_pos + (b->last - b->start); | |
| 326 b->file_pos += b->pos - b->start; | |
| 327 } | |
| 328 | |
| 329 cl->next = NULL; | |
| 330 *ctx->last_out = cl; | |
| 331 ctx->last_out = &cl->next; | |
| 332 } | |
| 333 | |
| 334 if (ctx->state == sub_start_state) { | |
| 335 ctx->copy_start = ctx->pos; | |
| 336 ctx->copy_end = ctx->pos; | |
| 337 | |
| 338 } else { | |
| 339 ctx->copy_start = NULL; | |
| 340 ctx->copy_end = NULL; | |
| 341 } | |
| 342 | |
| 343 if (rc == NGX_AGAIN) { | |
| 344 continue; | |
| 345 } | |
| 346 | |
| 347 | |
| 348 /* rc == NGX_OK */ | |
| 349 | |
| 350 b = ngx_calloc_buf(r->pool); | |
| 351 if (b == NULL) { | |
| 352 return NGX_ERROR; | |
| 353 } | |
| 354 | |
| 355 cl = ngx_alloc_chain_link(r->pool); | |
| 356 if (cl == NULL) { | |
| 357 return NGX_ERROR; | |
| 358 } | |
| 359 | |
| 360 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
| 361 | |
| 362 if (ctx->sub.data == NULL) { | |
| 363 | |
| 364 if (ngx_http_script_run(r, &ctx->sub, slcf->sub_lengths->elts, | |
| 365 0, slcf->sub_values->elts) | |
| 366 == NULL) | |
| 367 { | |
| 368 return NGX_ERROR; | |
| 369 } | |
| 370 } | |
| 371 | |
|
1555
76fe59c6fafb
fix empty string replacement in sub_filter
Igor Sysoev <igor@sysoev.ru>
parents:
1172
diff
changeset
|
372 if (ctx->sub.len) { |
|
76fe59c6fafb
fix empty string replacement in sub_filter
Igor Sysoev <igor@sysoev.ru>
parents:
1172
diff
changeset
|
373 b->memory = 1; |
|
76fe59c6fafb
fix empty string replacement in sub_filter
Igor Sysoev <igor@sysoev.ru>
parents:
1172
diff
changeset
|
374 b->pos = ctx->sub.data; |
|
76fe59c6fafb
fix empty string replacement in sub_filter
Igor Sysoev <igor@sysoev.ru>
parents:
1172
diff
changeset
|
375 b->last = ctx->sub.data + ctx->sub.len; |
|
76fe59c6fafb
fix empty string replacement in sub_filter
Igor Sysoev <igor@sysoev.ru>
parents:
1172
diff
changeset
|
376 |
|
76fe59c6fafb
fix empty string replacement in sub_filter
Igor Sysoev <igor@sysoev.ru>
parents:
1172
diff
changeset
|
377 } else { |
|
76fe59c6fafb
fix empty string replacement in sub_filter
Igor Sysoev <igor@sysoev.ru>
parents:
1172
diff
changeset
|
378 b->sync = 1; |
|
76fe59c6fafb
fix empty string replacement in sub_filter
Igor Sysoev <igor@sysoev.ru>
parents:
1172
diff
changeset
|
379 } |
| 1172 | 380 |
| 381 cl->buf = b; | |
| 382 cl->next = NULL; | |
| 383 *ctx->last_out = cl; | |
| 384 ctx->last_out = &cl->next; | |
| 385 | |
| 386 ctx->once = slcf->once; | |
| 387 | |
| 388 continue; | |
| 389 } | |
| 390 | |
| 391 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) { | |
| 392 if (b == NULL) { | |
| 393 if (ctx->free) { | |
| 394 cl = ctx->free; | |
| 395 ctx->free = ctx->free->next; | |
| 396 b = cl->buf; | |
| 397 ngx_memzero(b, sizeof(ngx_buf_t)); | |
| 398 | |
| 399 } else { | |
| 400 b = ngx_calloc_buf(r->pool); | |
| 401 if (b == NULL) { | |
| 402 return NGX_ERROR; | |
| 403 } | |
| 404 | |
| 405 cl = ngx_alloc_chain_link(r->pool); | |
| 406 if (cl == NULL) { | |
| 407 return NGX_ERROR; | |
| 408 } | |
| 409 | |
| 410 cl->buf = b; | |
| 411 } | |
| 412 | |
| 413 b->sync = 1; | |
| 414 | |
| 415 cl->next = NULL; | |
| 416 *ctx->last_out = cl; | |
| 417 ctx->last_out = &cl->next; | |
| 418 } | |
| 419 | |
| 420 b->last_buf = ctx->buf->last_buf; | |
| 421 b->shadow = ctx->buf; | |
| 422 | |
| 423 b->recycled = ctx->buf->recycled; | |
| 424 } | |
| 425 | |
| 426 ctx->buf = NULL; | |
| 427 | |
| 428 ctx->saved = ctx->looked; | |
| 429 } | |
| 430 | |
| 431 if (ctx->out == NULL && ctx->busy == NULL) { | |
| 432 return NGX_OK; | |
| 433 } | |
| 434 | |
| 435 return ngx_http_sub_output(r, ctx); | |
| 436 } | |
| 437 | |
| 438 | |
| 439 static ngx_int_t | |
| 440 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
| 441 { | |
| 442 ngx_int_t rc; | |
| 443 ngx_buf_t *b; | |
| 444 ngx_chain_t *cl; | |
| 445 | |
| 446 #if 1 | |
| 447 b = NULL; | |
| 448 for (cl = ctx->out; cl; cl = cl->next) { | |
| 449 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 450 "sub out: %p %p", cl->buf, cl->buf->pos); | |
| 451 if (cl->buf == b) { | |
| 452 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 453 "the same buf was used in sub"); | |
| 454 ngx_debug_point(); | |
| 455 return NGX_ERROR; | |
| 456 } | |
| 457 b = cl->buf; | |
| 458 } | |
| 459 #endif | |
| 460 | |
| 461 rc = ngx_http_next_body_filter(r, ctx->out); | |
| 462 | |
| 463 if (ctx->busy == NULL) { | |
| 464 ctx->busy = ctx->out; | |
| 465 | |
| 466 } else { | |
| 467 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } | |
| 468 cl->next = ctx->out; | |
| 469 } | |
| 470 | |
| 471 ctx->out = NULL; | |
| 472 ctx->last_out = &ctx->out; | |
| 473 | |
| 474 while (ctx->busy) { | |
| 475 | |
| 476 cl = ctx->busy; | |
| 477 b = cl->buf; | |
| 478 | |
| 479 if (ngx_buf_size(b) != 0) { | |
| 480 break; | |
| 481 } | |
| 482 | |
| 483 #if (NGX_HAVE_WRITE_ZEROCOPY) | |
| 484 if (b->zerocopy_busy) { | |
| 485 break; | |
| 486 } | |
| 487 #endif | |
| 488 | |
| 489 if (b->shadow) { | |
| 490 b->shadow->pos = b->shadow->last; | |
| 491 } | |
| 492 | |
| 493 ctx->busy = cl->next; | |
| 494 | |
| 495 if (ngx_buf_in_memory(b) || b->in_file) { | |
| 496 /* add data bufs only to the free buf chain */ | |
| 497 | |
| 498 cl->next = ctx->free; | |
| 499 ctx->free = cl; | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 if (ctx->in || ctx->buf) { | |
| 504 r->buffered |= NGX_HTTP_SUB_BUFFERED; | |
| 505 | |
| 506 } else { | |
| 507 r->buffered &= ~NGX_HTTP_SUB_BUFFERED; | |
| 508 } | |
| 509 | |
| 510 return rc; | |
| 511 } | |
| 512 | |
| 513 | |
| 514 static ngx_int_t | |
| 515 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
| 516 { | |
| 517 u_char *p, *last, *copy_end, ch, match; | |
| 518 size_t looked; | |
| 519 ngx_http_sub_state_e state; | |
| 520 | |
| 521 if (ctx->once) { | |
| 522 ctx->copy_start = ctx->pos; | |
| 523 ctx->copy_end = ctx->buf->last; | |
| 524 ctx->pos = ctx->buf->last; | |
| 525 ctx->looked = 0; | |
| 526 | |
| 527 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once"); | |
| 528 | |
| 529 return NGX_AGAIN; | |
| 530 } | |
| 531 | |
| 532 state = ctx->state; | |
| 533 looked = ctx->looked; | |
| 534 last = ctx->buf->last; | |
| 535 copy_end = ctx->copy_end; | |
| 536 | |
| 537 for (p = ctx->pos; p < last; p++) { | |
| 538 | |
| 539 ch = *p; | |
| 540 ch = ngx_tolower(ch); | |
| 541 | |
| 542 if (state == sub_start_state) { | |
| 543 | |
| 544 /* the tight loop */ | |
| 545 | |
| 546 match = ctx->match.data[0]; | |
| 547 | |
| 548 for ( ;; ) { | |
| 549 if (ch == match) { | |
| 550 copy_end = p; | |
| 551 looked = 1; | |
| 552 state = sub_match_state; | |
| 553 | |
| 554 goto match_started; | |
| 555 } | |
| 556 | |
| 557 if (++p == last) { | |
| 558 break; | |
| 559 } | |
| 560 | |
| 561 ch = *p; | |
| 562 ch = ngx_tolower(ch); | |
| 563 } | |
| 564 | |
|
1557
9d094e581587
*) add sub_filter parser fix similar to r1261 in SSI parser
Igor Sysoev <igor@sysoev.ru>
parents:
1555
diff
changeset
|
565 ctx->state = state; |
| 1172 | 566 ctx->pos = p; |
| 567 ctx->looked = looked; | |
| 568 ctx->copy_end = p; | |
| 569 | |
| 570 if (ctx->copy_start == NULL) { | |
| 571 ctx->copy_start = ctx->buf->pos; | |
| 572 } | |
| 573 | |
| 574 return NGX_AGAIN; | |
| 575 | |
| 576 match_started: | |
| 577 | |
| 578 continue; | |
| 579 } | |
| 580 | |
| 581 /* state == sub_match_state */ | |
| 582 | |
| 583 if (ch == ctx->match.data[looked]) { | |
| 584 looked++; | |
| 585 | |
| 586 if (looked == ctx->match.len) { | |
|
1557
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*) add sub_filter parser fix similar to r1261 in SSI parser
Igor Sysoev <igor@sysoev.ru>
parents:
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changeset
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587 if ((size_t) (p - ctx->pos) < looked) { |
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*) add sub_filter parser fix similar to r1261 in SSI parser
Igor Sysoev <igor@sysoev.ru>
parents:
1555
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changeset
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588 ctx->saved = 0; |
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9d094e581587
*) add sub_filter parser fix similar to r1261 in SSI parser
Igor Sysoev <igor@sysoev.ru>
parents:
1555
diff
changeset
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589 } |
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9d094e581587
*) add sub_filter parser fix similar to r1261 in SSI parser
Igor Sysoev <igor@sysoev.ru>
parents:
1555
diff
changeset
|
590 |
| 1172 | 591 ctx->state = sub_start_state; |
| 592 ctx->pos = p + 1; | |
| 593 ctx->looked = looked; | |
| 594 ctx->copy_end = copy_end; | |
| 595 | |
| 596 if (ctx->copy_start == NULL && copy_end) { | |
| 597 ctx->copy_start = ctx->buf->pos; | |
| 598 } | |
| 599 | |
| 600 return NGX_OK; | |
| 601 } | |
| 602 | |
| 603 } else if (ch == ctx->match.data[0]) { | |
| 604 copy_end = p; | |
| 605 looked = 1; | |
| 606 | |
| 607 } else { | |
| 608 copy_end = p; | |
| 609 looked = 0; | |
| 610 state = sub_start_state; | |
| 611 } | |
| 612 } | |
| 613 | |
| 614 ctx->state = state; | |
| 615 ctx->pos = p; | |
| 616 ctx->looked = looked; | |
| 617 | |
| 618 ctx->copy_end = (state == sub_start_state) ? p : copy_end; | |
| 619 | |
| 620 if (ctx->copy_start == NULL && ctx->copy_end) { | |
| 621 ctx->copy_start = ctx->buf->pos; | |
| 622 } | |
| 623 | |
| 624 return NGX_AGAIN; | |
| 625 } | |
| 626 | |
| 627 | |
| 628 static char * | |
| 629 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 630 { | |
| 631 ngx_http_sub_loc_conf_t *slcf = conf; | |
| 632 | |
| 633 ngx_str_t *value; | |
| 634 ngx_int_t n; | |
| 635 ngx_uint_t i; | |
| 636 ngx_http_script_compile_t sc; | |
| 637 | |
| 638 if (slcf->match.len) { | |
| 639 return "is duplicate"; | |
| 640 } | |
| 641 | |
| 642 value = cf->args->elts; | |
| 643 | |
| 644 slcf->match = value[1]; | |
| 645 | |
| 646 for (i = 0; i < value[1].len; i++) { | |
| 647 value[1].data[i] = ngx_tolower(value[1].data[i]); | |
| 648 } | |
| 649 | |
| 650 n = ngx_http_script_variables_count(&value[2]); | |
| 651 | |
| 652 if (n == 0) { | |
| 653 slcf->sub = value[2]; | |
| 654 return NGX_CONF_OK; | |
| 655 } | |
| 656 | |
| 657 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
| 658 | |
| 659 sc.cf = cf; | |
| 660 sc.source = &value[2]; | |
| 661 sc.lengths = &slcf->sub_lengths; | |
| 662 sc.values = &slcf->sub_values; | |
| 663 sc.variables = n; | |
| 664 sc.complete_lengths = 1; | |
| 665 sc.complete_values = 1; | |
| 666 | |
| 667 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
| 668 return NGX_CONF_ERROR; | |
| 669 } | |
| 670 | |
| 671 return NGX_CONF_OK; | |
| 672 } | |
| 673 | |
| 674 | |
| 675 static char * | |
| 676 ngx_http_sub_types(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 677 { | |
| 678 ngx_http_sub_loc_conf_t *slcf = conf; | |
| 679 | |
| 680 ngx_str_t *value, *type; | |
| 681 ngx_uint_t i; | |
| 682 | |
| 683 if (slcf->types == NULL) { | |
| 684 slcf->types = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t)); | |
| 685 if (slcf->types == NULL) { | |
| 686 return NGX_CONF_ERROR; | |
| 687 } | |
| 688 | |
| 689 type = ngx_array_push(slcf->types); | |
| 690 if (type == NULL) { | |
| 691 return NGX_CONF_ERROR; | |
| 692 } | |
| 693 | |
| 694 type->len = sizeof("text/html") - 1; | |
| 695 type->data = (u_char *) "text/html"; | |
| 696 } | |
| 697 | |
| 698 value = cf->args->elts; | |
| 699 | |
| 700 for (i = 1; i < cf->args->nelts; i++) { | |
| 701 | |
| 702 if (ngx_strcmp(value[i].data, "text/html") == 0) { | |
| 703 continue; | |
| 704 } | |
| 705 | |
| 706 type = ngx_array_push(slcf->types); | |
| 707 if (type == NULL) { | |
| 708 return NGX_CONF_ERROR; | |
| 709 } | |
| 710 | |
| 711 type->len = value[i].len; | |
| 712 | |
| 713 type->data = ngx_palloc(cf->pool, type->len + 1); | |
| 714 if (type->data == NULL) { | |
| 715 return NGX_CONF_ERROR; | |
| 716 } | |
| 717 | |
| 718 ngx_cpystrn(type->data, value[i].data, type->len + 1); | |
| 719 } | |
| 720 | |
| 721 return NGX_CONF_OK; | |
| 722 } | |
| 723 | |
| 724 | |
| 725 static void * | |
| 726 ngx_http_sub_create_conf(ngx_conf_t *cf) | |
| 727 { | |
| 728 ngx_http_sub_loc_conf_t *slcf; | |
| 729 | |
| 730 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t)); | |
| 731 if (slcf == NULL) { | |
| 732 return NGX_CONF_ERROR; | |
| 733 } | |
| 734 | |
| 735 /* | |
| 736 * set by ngx_pcalloc(): | |
| 737 * | |
| 738 * conf->match.len = 0; | |
| 739 * conf->match.data = NULL; | |
| 740 * conf->sub.len = 0; | |
| 741 * conf->sub.data = NULL; | |
| 742 * conf->sub_lengths = NULL; | |
| 743 * conf->sub_values = NULL; | |
| 744 * conf->types = NULL; | |
| 745 */ | |
| 746 | |
| 747 slcf->once = NGX_CONF_UNSET; | |
| 748 | |
| 749 return slcf; | |
| 750 } | |
| 751 | |
| 752 | |
| 753 static char * | |
| 754 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 755 { | |
| 756 ngx_http_sub_loc_conf_t *prev = parent; | |
| 757 ngx_http_sub_loc_conf_t *conf = child; | |
| 758 | |
| 759 ngx_str_t *type; | |
| 760 | |
| 761 ngx_conf_merge_value(conf->once, prev->once, 1); | |
| 762 ngx_conf_merge_str_value(conf->match, prev->match, ""); | |
| 763 | |
| 764 if (conf->sub.data == NULL && conf->sub_lengths == NULL) { | |
| 765 conf->sub = prev->sub; | |
| 766 conf->sub_lengths = prev->sub_lengths; | |
| 767 conf->sub_values = prev->sub_values; | |
| 768 } | |
| 769 | |
| 770 if (conf->types == NULL) { | |
| 771 if (prev->types == NULL) { | |
| 772 conf->types = ngx_array_create(cf->pool, 1, sizeof(ngx_str_t)); | |
| 773 if (conf->types == NULL) { | |
| 774 return NGX_CONF_ERROR; | |
| 775 } | |
| 776 | |
| 777 type = ngx_array_push(conf->types); | |
| 778 if (type == NULL) { | |
| 779 return NGX_CONF_ERROR; | |
| 780 } | |
| 781 | |
| 782 type->len = sizeof("text/html") - 1; | |
| 783 type->data = (u_char *) "text/html"; | |
| 784 | |
| 785 } else { | |
| 786 conf->types = prev->types; | |
| 787 } | |
| 788 } | |
| 789 | |
| 790 return NGX_CONF_OK; | |
| 791 } | |
| 792 | |
| 793 | |
| 794 static ngx_int_t | |
| 795 ngx_http_sub_filter_init(ngx_conf_t *cf) | |
| 796 { | |
| 797 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 798 ngx_http_top_header_filter = ngx_http_sub_header_filter; | |
| 799 | |
| 800 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 801 ngx_http_top_body_filter = ngx_http_sub_body_filter; | |
| 802 | |
| 803 return NGX_OK; | |
| 804 } |