Mercurial > hg > nginx
annotate src/http/modules/ngx_http_sub_filter_module.c @ 4947:4251e72b8bb4
Allow the complex value to be defined as an empty string.
This makes conversion from strings to complex values possible
without the loss of functionality.
| author | Ruslan Ermilov <ru@nginx.com> |
|---|---|
| date | Thu, 06 Dec 2012 23:03:53 +0000 |
| parents | 4a18bf1833a9 |
| children | 4c1a604b0285 |
| rev | line source |
|---|---|
| 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 |
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21 ngx_array_t *types_keys; |
| 1172 | 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 { | |
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32 ngx_str_t match; |
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33 ngx_str_t saved; |
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34 ngx_str_t looked; |
| 1172 | 35 |
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36 ngx_uint_t once; /* unsigned once:1 */ |
| 1172 | 37 |
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38 ngx_buf_t *buf; |
| 1172 | 39 |
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40 u_char *pos; |
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41 u_char *copy_start; |
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42 u_char *copy_end; |
| 1172 | 43 |
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44 ngx_chain_t *in; |
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45 ngx_chain_t *out; |
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46 ngx_chain_t **last_out; |
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47 ngx_chain_t *busy; |
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48 ngx_chain_t *free; |
| 1172 | 49 |
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50 ngx_str_t sub; |
| 1172 | 51 |
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52 ngx_uint_t state; |
| 1172 | 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 void *ngx_http_sub_create_conf(ngx_conf_t *cf); | |
| 64 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf, | |
| 65 void *parent, void *child); | |
| 66 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf); | |
| 67 | |
| 68 | |
| 69 static ngx_command_t ngx_http_sub_filter_commands[] = { | |
| 70 | |
| 71 { ngx_string("sub_filter"), | |
| 72 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
| 73 ngx_http_sub_filter, | |
| 74 NGX_HTTP_LOC_CONF_OFFSET, | |
| 75 0, | |
| 76 NULL }, | |
| 77 | |
| 78 { ngx_string("sub_filter_types"), | |
| 79 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, | |
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80 ngx_http_types_slot, |
| 1172 | 81 NGX_HTTP_LOC_CONF_OFFSET, |
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82 offsetof(ngx_http_sub_loc_conf_t, types_keys), |
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83 &ngx_http_html_default_types[0] }, |
| 1172 | 84 |
| 85 { ngx_string("sub_filter_once"), | |
| 86 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
| 87 ngx_conf_set_flag_slot, | |
| 88 NGX_HTTP_LOC_CONF_OFFSET, | |
| 89 offsetof(ngx_http_sub_loc_conf_t, once), | |
| 90 NULL }, | |
| 91 | |
| 92 ngx_null_command | |
| 93 }; | |
| 94 | |
| 95 | |
| 96 static ngx_http_module_t ngx_http_sub_filter_module_ctx = { | |
| 97 NULL, /* preconfiguration */ | |
| 98 ngx_http_sub_filter_init, /* postconfiguration */ | |
| 99 | |
| 100 NULL, /* create main configuration */ | |
| 101 NULL, /* init main configuration */ | |
| 102 | |
| 103 NULL, /* create server configuration */ | |
| 104 NULL, /* merge server configuration */ | |
| 105 | |
| 106 ngx_http_sub_create_conf, /* create location configuration */ | |
| 107 ngx_http_sub_merge_conf /* merge location configuration */ | |
| 108 }; | |
| 109 | |
| 110 | |
| 111 ngx_module_t ngx_http_sub_filter_module = { | |
| 112 NGX_MODULE_V1, | |
| 113 &ngx_http_sub_filter_module_ctx, /* module context */ | |
| 114 ngx_http_sub_filter_commands, /* module directives */ | |
| 115 NGX_HTTP_MODULE, /* module type */ | |
| 116 NULL, /* init master */ | |
| 117 NULL, /* init module */ | |
| 118 NULL, /* init process */ | |
| 119 NULL, /* init thread */ | |
| 120 NULL, /* exit thread */ | |
| 121 NULL, /* exit process */ | |
| 122 NULL, /* exit master */ | |
| 123 NGX_MODULE_V1_PADDING | |
| 124 }; | |
| 125 | |
| 126 | |
| 127 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 128 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 129 | |
| 130 | |
| 131 static ngx_int_t | |
| 132 ngx_http_sub_header_filter(ngx_http_request_t *r) | |
| 133 { | |
| 134 ngx_http_sub_ctx_t *ctx; | |
| 135 ngx_http_sub_loc_conf_t *slcf; | |
| 136 | |
| 137 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
| 138 | |
| 139 if (slcf->match.len == 0 | |
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140 || r->headers_out.content_length_n == 0 |
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141 || ngx_http_test_content_type(r, &slcf->types) == NULL) |
| 1172 | 142 { |
| 143 return ngx_http_next_header_filter(r); | |
| 144 } | |
| 145 | |
| 146 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t)); | |
| 147 if (ctx == NULL) { | |
| 148 return NGX_ERROR; | |
| 149 } | |
| 150 | |
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151 ctx->saved.data = ngx_pnalloc(r->pool, slcf->match.len); |
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152 if (ctx->saved.data == NULL) { |
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153 return NGX_ERROR; |
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154 } |
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155 |
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156 ctx->looked.data = ngx_pnalloc(r->pool, slcf->match.len); |
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157 if (ctx->looked.data == NULL) { |
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158 return NGX_ERROR; |
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159 } |
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160 |
| 1172 | 161 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module); |
| 162 | |
| 163 ctx->match = slcf->match; | |
| 164 ctx->last_out = &ctx->out; | |
| 165 | |
| 166 r->filter_need_in_memory = 1; | |
| 167 | |
| 168 if (r == r->main) { | |
| 169 ngx_http_clear_content_length(r); | |
| 170 ngx_http_clear_last_modified(r); | |
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171 ngx_http_clear_etag(r); |
| 1172 | 172 } |
| 173 | |
| 174 return ngx_http_next_header_filter(r); | |
| 175 } | |
| 176 | |
| 177 | |
| 178 static ngx_int_t | |
| 179 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 180 { | |
| 181 ngx_int_t rc; | |
| 182 ngx_buf_t *b; | |
| 183 ngx_chain_t *cl; | |
| 184 ngx_http_sub_ctx_t *ctx; | |
| 185 ngx_http_sub_loc_conf_t *slcf; | |
| 186 | |
| 187 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module); | |
| 188 | |
| 189 if (ctx == NULL) { | |
| 190 return ngx_http_next_body_filter(r, in); | |
| 191 } | |
| 192 | |
| 193 if ((in == NULL | |
| 194 && ctx->buf == NULL | |
| 195 && ctx->in == NULL | |
| 196 && ctx->busy == NULL)) | |
| 197 { | |
| 198 return ngx_http_next_body_filter(r, in); | |
| 199 } | |
| 200 | |
| 201 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) { | |
| 202 | |
| 203 if (ctx->busy) { | |
| 204 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) { | |
| 205 return NGX_ERROR; | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 return ngx_http_next_body_filter(r, in); | |
| 210 } | |
| 211 | |
| 212 /* add the incoming chain to the chain ctx->in */ | |
| 213 | |
| 214 if (in) { | |
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215 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { |
| 1172 | 216 return NGX_ERROR; |
| 217 } | |
| 218 } | |
| 219 | |
| 220 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 221 "http sub filter \"%V\"", &r->uri); | |
| 222 | |
| 223 while (ctx->in || ctx->buf) { | |
| 224 | |
| 3642 | 225 if (ctx->buf == NULL) { |
| 1172 | 226 ctx->buf = ctx->in->buf; |
| 227 ctx->in = ctx->in->next; | |
| 228 ctx->pos = ctx->buf->pos; | |
| 229 } | |
| 230 | |
| 231 if (ctx->state == sub_start_state) { | |
| 232 ctx->copy_start = ctx->pos; | |
| 233 ctx->copy_end = ctx->pos; | |
| 234 } | |
| 235 | |
| 236 b = NULL; | |
| 237 | |
| 238 while (ctx->pos < ctx->buf->last) { | |
| 239 | |
| 240 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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241 "saved: \"%V\" state: %d", &ctx->saved, ctx->state); |
| 1172 | 242 |
| 243 rc = ngx_http_sub_parse(r, ctx); | |
| 244 | |
| 245 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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246 "parse: %d, looked: \"%V\" %p-%p", |
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247 rc, &ctx->looked, ctx->copy_start, ctx->copy_end); |
| 1172 | 248 |
| 249 if (rc == NGX_ERROR) { | |
| 250 return rc; | |
| 251 } | |
| 252 | |
| 253 if (ctx->copy_start != ctx->copy_end) { | |
| 254 | |
| 255 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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256 "saved: \"%V\"", &ctx->saved); |
| 1172 | 257 |
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258 if (ctx->saved.len) { |
| 1172 | 259 |
| 260 if (ctx->free) { | |
| 261 cl = ctx->free; | |
| 262 ctx->free = ctx->free->next; | |
| 263 b = cl->buf; | |
| 264 ngx_memzero(b, sizeof(ngx_buf_t)); | |
| 265 | |
| 266 } else { | |
| 267 b = ngx_calloc_buf(r->pool); | |
| 268 if (b == NULL) { | |
| 269 return NGX_ERROR; | |
| 270 } | |
| 271 | |
| 272 cl = ngx_alloc_chain_link(r->pool); | |
| 273 if (cl == NULL) { | |
| 274 return NGX_ERROR; | |
| 275 } | |
| 276 | |
| 277 cl->buf = b; | |
| 278 } | |
| 279 | |
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280 b->pos = ngx_pnalloc(r->pool, ctx->saved.len); |
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281 if (b->pos == NULL) { |
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282 return NGX_ERROR; |
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283 } |
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284 |
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285 ngx_memcpy(b->pos, ctx->saved.data, ctx->saved.len); |
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286 b->last = b->pos + ctx->saved.len; |
| 1172 | 287 b->memory = 1; |
| 288 | |
| 289 *ctx->last_out = cl; | |
| 290 ctx->last_out = &cl->next; | |
| 291 | |
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292 ctx->saved.len = 0; |
| 1172 | 293 } |
| 294 | |
| 295 if (ctx->free) { | |
| 296 cl = ctx->free; | |
| 297 ctx->free = ctx->free->next; | |
| 298 b = cl->buf; | |
| 299 | |
| 300 } else { | |
| 301 b = ngx_alloc_buf(r->pool); | |
| 302 if (b == NULL) { | |
| 303 return NGX_ERROR; | |
| 304 } | |
| 305 | |
| 306 cl = ngx_alloc_chain_link(r->pool); | |
| 307 if (cl == NULL) { | |
| 308 return NGX_ERROR; | |
| 309 } | |
| 310 | |
| 311 cl->buf = b; | |
| 312 } | |
| 313 | |
| 314 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); | |
| 315 | |
| 316 b->pos = ctx->copy_start; | |
| 317 b->last = ctx->copy_end; | |
| 318 b->shadow = NULL; | |
| 319 b->last_buf = 0; | |
| 320 b->recycled = 0; | |
| 321 | |
| 322 if (b->in_file) { | |
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323 b->file_last = b->file_pos + (b->last - ctx->buf->pos); |
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324 b->file_pos += b->pos - ctx->buf->pos; |
| 1172 | 325 } |
| 326 | |
| 327 cl->next = NULL; | |
| 328 *ctx->last_out = cl; | |
| 329 ctx->last_out = &cl->next; | |
| 330 } | |
| 331 | |
| 332 if (ctx->state == sub_start_state) { | |
| 333 ctx->copy_start = ctx->pos; | |
| 334 ctx->copy_end = ctx->pos; | |
| 335 | |
| 336 } else { | |
| 337 ctx->copy_start = NULL; | |
| 338 ctx->copy_end = NULL; | |
| 339 } | |
| 340 | |
| 341 if (rc == NGX_AGAIN) { | |
| 342 continue; | |
| 343 } | |
| 344 | |
| 345 | |
| 346 /* rc == NGX_OK */ | |
| 347 | |
| 348 b = ngx_calloc_buf(r->pool); | |
| 349 if (b == NULL) { | |
| 350 return NGX_ERROR; | |
| 351 } | |
| 352 | |
| 353 cl = ngx_alloc_chain_link(r->pool); | |
| 354 if (cl == NULL) { | |
| 355 return NGX_ERROR; | |
| 356 } | |
| 357 | |
| 358 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
| 359 | |
| 360 if (ctx->sub.data == NULL) { | |
| 361 | |
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362 if (ngx_http_complex_value(r, &slcf->value, &ctx->sub) |
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363 != NGX_OK) |
| 1172 | 364 { |
| 365 return NGX_ERROR; | |
| 366 } | |
| 367 } | |
| 368 | |
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369 if (ctx->sub.len) { |
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370 b->memory = 1; |
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371 b->pos = ctx->sub.data; |
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372 b->last = ctx->sub.data + ctx->sub.len; |
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373 |
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374 } else { |
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375 b->sync = 1; |
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376 } |
| 1172 | 377 |
| 378 cl->buf = b; | |
| 379 cl->next = NULL; | |
| 380 *ctx->last_out = cl; | |
| 381 ctx->last_out = &cl->next; | |
| 382 | |
| 383 ctx->once = slcf->once; | |
| 384 | |
| 385 continue; | |
| 386 } | |
| 387 | |
| 388 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) { | |
| 389 if (b == NULL) { | |
| 390 if (ctx->free) { | |
| 391 cl = ctx->free; | |
| 392 ctx->free = ctx->free->next; | |
| 393 b = cl->buf; | |
| 394 ngx_memzero(b, sizeof(ngx_buf_t)); | |
| 395 | |
| 396 } else { | |
| 397 b = ngx_calloc_buf(r->pool); | |
| 398 if (b == NULL) { | |
| 399 return NGX_ERROR; | |
| 400 } | |
| 401 | |
| 402 cl = ngx_alloc_chain_link(r->pool); | |
| 403 if (cl == NULL) { | |
| 404 return NGX_ERROR; | |
| 405 } | |
| 406 | |
| 407 cl->buf = b; | |
| 408 } | |
| 409 | |
| 410 b->sync = 1; | |
| 411 | |
| 412 cl->next = NULL; | |
| 413 *ctx->last_out = cl; | |
| 414 ctx->last_out = &cl->next; | |
| 415 } | |
| 416 | |
| 417 b->last_buf = ctx->buf->last_buf; | |
| 418 b->shadow = ctx->buf; | |
| 419 | |
| 420 b->recycled = ctx->buf->recycled; | |
| 421 } | |
| 422 | |
| 423 ctx->buf = NULL; | |
| 424 | |
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425 ctx->saved.len = ctx->looked.len; |
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426 ngx_memcpy(ctx->saved.data, ctx->looked.data, ctx->looked.len); |
| 1172 | 427 } |
| 428 | |
| 429 if (ctx->out == NULL && ctx->busy == NULL) { | |
| 430 return NGX_OK; | |
| 431 } | |
| 432 | |
| 433 return ngx_http_sub_output(r, ctx); | |
| 434 } | |
| 435 | |
| 436 | |
| 437 static ngx_int_t | |
| 438 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
| 439 { | |
| 440 ngx_int_t rc; | |
| 441 ngx_buf_t *b; | |
| 442 ngx_chain_t *cl; | |
| 443 | |
| 444 #if 1 | |
| 445 b = NULL; | |
| 446 for (cl = ctx->out; cl; cl = cl->next) { | |
| 447 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 448 "sub out: %p %p", cl->buf, cl->buf->pos); | |
| 449 if (cl->buf == b) { | |
| 450 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 451 "the same buf was used in sub"); | |
| 452 ngx_debug_point(); | |
| 453 return NGX_ERROR; | |
| 454 } | |
| 455 b = cl->buf; | |
| 456 } | |
| 457 #endif | |
| 458 | |
| 459 rc = ngx_http_next_body_filter(r, ctx->out); | |
| 460 | |
| 461 if (ctx->busy == NULL) { | |
| 462 ctx->busy = ctx->out; | |
| 463 | |
| 464 } else { | |
| 465 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } | |
| 466 cl->next = ctx->out; | |
| 467 } | |
| 468 | |
| 469 ctx->out = NULL; | |
| 470 ctx->last_out = &ctx->out; | |
| 471 | |
| 472 while (ctx->busy) { | |
| 473 | |
| 474 cl = ctx->busy; | |
| 475 b = cl->buf; | |
| 476 | |
| 477 if (ngx_buf_size(b) != 0) { | |
| 478 break; | |
| 479 } | |
| 480 | |
| 481 if (b->shadow) { | |
| 482 b->shadow->pos = b->shadow->last; | |
| 483 } | |
| 484 | |
| 485 ctx->busy = cl->next; | |
| 486 | |
| 487 if (ngx_buf_in_memory(b) || b->in_file) { | |
| 488 /* add data bufs only to the free buf chain */ | |
| 489 | |
| 490 cl->next = ctx->free; | |
| 491 ctx->free = cl; | |
| 492 } | |
| 493 } | |
| 494 | |
| 495 if (ctx->in || ctx->buf) { | |
| 496 r->buffered |= NGX_HTTP_SUB_BUFFERED; | |
| 497 | |
| 498 } else { | |
| 499 r->buffered &= ~NGX_HTTP_SUB_BUFFERED; | |
| 500 } | |
| 501 | |
| 502 return rc; | |
| 503 } | |
| 504 | |
| 505 | |
| 506 static ngx_int_t | |
| 507 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
| 508 { | |
| 509 u_char *p, *last, *copy_end, ch, match; | |
| 510 size_t looked; | |
| 511 ngx_http_sub_state_e state; | |
| 512 | |
| 513 if (ctx->once) { | |
| 514 ctx->copy_start = ctx->pos; | |
| 515 ctx->copy_end = ctx->buf->last; | |
| 516 ctx->pos = ctx->buf->last; | |
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517 ctx->looked.len = 0; |
| 1172 | 518 |
| 519 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once"); | |
| 520 | |
| 521 return NGX_AGAIN; | |
| 522 } | |
| 523 | |
| 524 state = ctx->state; | |
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525 looked = ctx->looked.len; |
| 1172 | 526 last = ctx->buf->last; |
| 527 copy_end = ctx->copy_end; | |
| 528 | |
| 529 for (p = ctx->pos; p < last; p++) { | |
| 530 | |
| 531 ch = *p; | |
| 532 ch = ngx_tolower(ch); | |
| 533 | |
| 534 if (state == sub_start_state) { | |
| 535 | |
| 536 /* the tight loop */ | |
| 537 | |
| 538 match = ctx->match.data[0]; | |
| 539 | |
| 540 for ( ;; ) { | |
| 541 if (ch == match) { | |
| 542 copy_end = p; | |
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543 ctx->looked.data[0] = *p; |
| 1172 | 544 looked = 1; |
| 545 state = sub_match_state; | |
| 546 | |
| 547 goto match_started; | |
| 548 } | |
| 549 | |
| 550 if (++p == last) { | |
| 551 break; | |
| 552 } | |
| 553 | |
| 554 ch = *p; | |
| 555 ch = ngx_tolower(ch); | |
| 556 } | |
| 557 | |
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558 ctx->state = state; |
| 1172 | 559 ctx->pos = p; |
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560 ctx->looked.len = looked; |
| 1172 | 561 ctx->copy_end = p; |
| 562 | |
| 563 if (ctx->copy_start == NULL) { | |
| 564 ctx->copy_start = ctx->buf->pos; | |
| 565 } | |
| 566 | |
| 567 return NGX_AGAIN; | |
| 568 | |
| 569 match_started: | |
| 570 | |
| 571 continue; | |
| 572 } | |
| 573 | |
| 574 /* state == sub_match_state */ | |
| 575 | |
| 576 if (ch == ctx->match.data[looked]) { | |
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577 ctx->looked.data[looked] = *p; |
| 1172 | 578 looked++; |
| 579 | |
| 580 if (looked == ctx->match.len) { | |
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581 if ((size_t) (p - ctx->pos) < looked) { |
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582 ctx->saved.len = 0; |
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583 } |
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584 |
| 1172 | 585 ctx->state = sub_start_state; |
| 586 ctx->pos = p + 1; | |
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587 ctx->looked.len = 0; |
| 1172 | 588 ctx->copy_end = copy_end; |
| 589 | |
| 590 if (ctx->copy_start == NULL && copy_end) { | |
| 591 ctx->copy_start = ctx->buf->pos; | |
| 592 } | |
| 593 | |
| 594 return NGX_OK; | |
| 595 } | |
| 596 | |
| 597 } else if (ch == ctx->match.data[0]) { | |
| 598 copy_end = p; | |
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599 ctx->looked.data[0] = *p; |
| 1172 | 600 looked = 1; |
| 601 | |
| 602 } else { | |
| 603 copy_end = p; | |
| 604 looked = 0; | |
| 605 state = sub_start_state; | |
| 606 } | |
| 607 } | |
| 608 | |
| 609 ctx->state = state; | |
| 610 ctx->pos = p; | |
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611 ctx->looked.len = looked; |
| 1172 | 612 |
| 613 ctx->copy_end = (state == sub_start_state) ? p : copy_end; | |
| 614 | |
| 615 if (ctx->copy_start == NULL && ctx->copy_end) { | |
| 616 ctx->copy_start = ctx->buf->pos; | |
| 617 } | |
| 618 | |
| 619 return NGX_AGAIN; | |
| 620 } | |
| 621 | |
| 622 | |
| 623 static char * | |
| 624 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 625 { | |
| 626 ngx_http_sub_loc_conf_t *slcf = conf; | |
| 627 | |
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628 ngx_str_t *value; |
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629 ngx_http_compile_complex_value_t ccv; |
| 1172 | 630 |
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631 if (slcf->match.data) { |
| 1172 | 632 return "is duplicate"; |
| 633 } | |
| 634 | |
| 635 value = cf->args->elts; | |
| 636 | |
| 2135 | 637 ngx_strlow(value[1].data, value[1].data, value[1].len); |
| 1172 | 638 |
| 2135 | 639 slcf->match = value[1]; |
| 1172 | 640 |
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641 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
| 1172 | 642 |
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643 ccv.cf = cf; |
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644 ccv.value = &value[2]; |
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645 ccv.complex_value = &slcf->value; |
| 1172 | 646 |
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647 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
| 1172 | 648 return NGX_CONF_ERROR; |
| 649 } | |
| 650 | |
| 651 return NGX_CONF_OK; | |
| 652 } | |
| 653 | |
| 654 | |
| 655 static void * | |
| 656 ngx_http_sub_create_conf(ngx_conf_t *cf) | |
| 657 { | |
| 658 ngx_http_sub_loc_conf_t *slcf; | |
| 659 | |
| 660 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t)); | |
| 661 if (slcf == NULL) { | |
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662 return NULL; |
| 1172 | 663 } |
| 664 | |
| 665 /* | |
| 666 * set by ngx_pcalloc(): | |
| 667 * | |
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668 * conf->match = { 0, NULL }; |
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669 * conf->sub = { 0, NULL }; |
| 1172 | 670 * conf->sub_lengths = NULL; |
| 671 * conf->sub_values = NULL; | |
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672 * conf->types = { NULL }; |
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673 * conf->types_keys = NULL; |
| 1172 | 674 */ |
| 675 | |
| 676 slcf->once = NGX_CONF_UNSET; | |
| 677 | |
| 678 return slcf; | |
| 679 } | |
| 680 | |
| 681 | |
| 682 static char * | |
| 683 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 684 { | |
| 685 ngx_http_sub_loc_conf_t *prev = parent; | |
| 686 ngx_http_sub_loc_conf_t *conf = child; | |
| 687 | |
| 688 ngx_conf_merge_value(conf->once, prev->once, 1); | |
| 689 ngx_conf_merge_str_value(conf->match, prev->match, ""); | |
| 690 | |
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691 if (conf->value.value.data == NULL) { |
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692 conf->value = prev->value; |
| 1172 | 693 } |
| 694 | |
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695 if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types, |
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696 &prev->types_keys, &prev->types, |
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697 ngx_http_html_default_types) |
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698 != NGX_OK) |
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699 { |
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700 return NGX_CONF_ERROR; |
| 1172 | 701 } |
| 702 | |
| 703 return NGX_CONF_OK; | |
| 704 } | |
| 705 | |
| 706 | |
| 707 static ngx_int_t | |
| 708 ngx_http_sub_filter_init(ngx_conf_t *cf) | |
| 709 { | |
| 710 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 711 ngx_http_top_header_filter = ngx_http_sub_header_filter; | |
| 712 | |
| 713 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 714 ngx_http_top_body_filter = ngx_http_sub_body_filter; | |
| 715 | |
| 716 return NGX_OK; | |
| 717 } |