Mercurial > hg > ngx_http_gunzip_filter_module
annotate ngx_http_gunzip_filter_module.c @ 1:0dd7d109e56b
Gunzip: add more tests and improve docs.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Sun, 20 Dec 2009 03:55:31 +0300 |
| parents | a75d4ad9c5d2 |
| children | 5c999acd9436 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 * Copyright (C) Maxim Dounin | |
| 5 */ | |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_http.h> | |
| 11 #include <nginx.h> | |
| 12 | |
| 13 #include <zlib.h> | |
| 14 | |
| 15 | |
| 16 typedef struct { | |
| 17 ngx_flag_t enable; | |
| 18 ngx_bufs_t bufs; | |
| 19 } ngx_http_gunzip_conf_t; | |
| 20 | |
| 21 | |
| 22 typedef struct { | |
| 23 ngx_chain_t *in; | |
| 24 ngx_chain_t *free; | |
| 25 ngx_chain_t *busy; | |
| 26 ngx_chain_t *out; | |
| 27 ngx_chain_t **last_out; | |
| 28 | |
| 29 ngx_buf_t *in_buf; | |
| 30 ngx_buf_t *out_buf; | |
| 31 ngx_int_t bufs; | |
| 32 | |
| 33 unsigned started:1; | |
| 34 unsigned flush:4; | |
| 35 unsigned redo:1; | |
| 36 unsigned done:1; | |
| 37 unsigned nomem:1; | |
| 38 | |
| 39 z_stream zstream; | |
| 40 ngx_http_request_t *request; | |
| 41 } ngx_http_gunzip_ctx_t; | |
| 42 | |
| 43 | |
| 44 static ngx_int_t ngx_http_gunzip_filter_inflate_start(ngx_http_request_t *r, | |
| 45 ngx_http_gunzip_ctx_t *ctx); | |
| 46 static ngx_int_t ngx_http_gunzip_filter_add_data(ngx_http_request_t *r, | |
| 47 ngx_http_gunzip_ctx_t *ctx); | |
| 48 static ngx_int_t ngx_http_gunzip_filter_get_buf(ngx_http_request_t *r, | |
| 49 ngx_http_gunzip_ctx_t *ctx); | |
| 50 static ngx_int_t ngx_http_gunzip_filter_inflate(ngx_http_request_t *r, | |
| 51 ngx_http_gunzip_ctx_t *ctx); | |
| 52 static ngx_int_t ngx_http_gunzip_filter_inflate_end(ngx_http_request_t *r, | |
| 53 ngx_http_gunzip_ctx_t *ctx); | |
| 54 | |
| 55 static void *ngx_http_gunzip_filter_alloc(void *opaque, u_int items, | |
| 56 u_int size); | |
| 57 static void ngx_http_gunzip_filter_free(void *opaque, void *address); | |
| 58 | |
| 59 static ngx_int_t ngx_http_gunzip_filter_init(ngx_conf_t *cf); | |
| 60 static void *ngx_http_gunzip_create_conf(ngx_conf_t *cf); | |
| 61 static char *ngx_http_gunzip_merge_conf(ngx_conf_t *cf, | |
| 62 void *parent, void *child); | |
| 63 | |
| 64 | |
| 65 static ngx_command_t ngx_http_gunzip_filter_commands[] = { | |
| 66 | |
| 67 { ngx_string("gunzip"), | |
| 68 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
| 69 ngx_conf_set_flag_slot, | |
| 70 NGX_HTTP_LOC_CONF_OFFSET, | |
| 71 offsetof(ngx_http_gunzip_conf_t, enable), | |
| 72 NULL }, | |
| 73 | |
| 74 { ngx_string("gunzip_buffers"), | |
| 75 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
| 76 ngx_conf_set_bufs_slot, | |
| 77 NGX_HTTP_LOC_CONF_OFFSET, | |
| 78 offsetof(ngx_http_gunzip_conf_t, bufs), | |
| 79 NULL }, | |
| 80 | |
| 81 ngx_null_command | |
| 82 }; | |
| 83 | |
| 84 | |
| 85 static ngx_http_module_t ngx_http_gunzip_filter_module_ctx = { | |
| 86 NULL, /* preconfiguration */ | |
| 87 ngx_http_gunzip_filter_init, /* postconfiguration */ | |
| 88 | |
| 89 NULL, /* create main configuration */ | |
| 90 NULL, /* init main configuration */ | |
| 91 | |
| 92 NULL, /* create server configuration */ | |
| 93 NULL, /* merge server configuration */ | |
| 94 | |
| 95 ngx_http_gunzip_create_conf, /* create location configuration */ | |
| 96 ngx_http_gunzip_merge_conf /* merge location configuration */ | |
| 97 }; | |
| 98 | |
| 99 | |
| 100 ngx_module_t ngx_http_gunzip_filter_module = { | |
| 101 NGX_MODULE_V1, | |
| 102 &ngx_http_gunzip_filter_module_ctx, /* module context */ | |
| 103 ngx_http_gunzip_filter_commands, /* module directives */ | |
| 104 NGX_HTTP_MODULE, /* module type */ | |
| 105 NULL, /* init master */ | |
| 106 NULL, /* init module */ | |
| 107 NULL, /* init process */ | |
| 108 NULL, /* init thread */ | |
| 109 NULL, /* exit thread */ | |
| 110 NULL, /* exit process */ | |
| 111 NULL, /* exit master */ | |
| 112 NGX_MODULE_V1_PADDING | |
| 113 }; | |
| 114 | |
| 115 | |
| 116 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 117 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 118 | |
| 119 | |
| 120 static ngx_int_t | |
| 121 ngx_http_gunzip_header_filter(ngx_http_request_t *r) | |
| 122 { | |
| 123 ngx_http_gunzip_ctx_t *ctx; | |
| 124 ngx_http_gunzip_conf_t *conf; | |
| 125 | |
| 126 conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module); | |
| 127 | |
| 128 /* TODO support multiple content-codings */ | |
|
1
0dd7d109e56b
Gunzip: add more tests and improve docs.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
129 /* TODO always gunzip - due to configuration or module request */ |
|
0dd7d109e56b
Gunzip: add more tests and improve docs.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
130 /* TODO ignore content encoding? */ |
| 0 | 131 |
| 132 if (!conf->enable | |
| 133 || r->headers_out.content_encoding == NULL | |
| 134 || r->headers_out.content_encoding->value.len != 4 | |
| 135 || ngx_strncasecmp(r->headers_out.content_encoding->value.data, | |
| 136 (u_char *) "gzip", 4) != 0) | |
| 137 { | |
| 138 return ngx_http_next_header_filter(r); | |
| 139 } | |
| 140 | |
| 141 #if (nginx_version >= 8025) | |
| 142 | |
| 143 r->gzip_vary = 1; | |
| 144 | |
| 145 if (!r->gzip_tested) { | |
| 146 if (ngx_http_gzip_ok(r) == NGX_OK) { | |
| 147 return ngx_http_next_header_filter(r); | |
| 148 } | |
| 149 | |
| 150 } else if (!r->gzip_ok) { | |
| 151 return ngx_http_next_header_filter(r); | |
| 152 } | |
| 153 | |
| 154 #else | |
| 155 | |
| 156 if (ngx_http_gzip_ok(r) == NGX_OK) { | |
| 157 return ngx_http_next_header_filter(r); | |
| 158 } | |
| 159 | |
| 160 #endif | |
| 161 | |
| 162 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gunzip_ctx_t)); | |
| 163 if (ctx == NULL) { | |
| 164 return NGX_ERROR; | |
| 165 } | |
| 166 | |
| 167 ngx_http_set_ctx(r, ctx, ngx_http_gunzip_filter_module); | |
| 168 | |
| 169 ctx->request = r; | |
| 170 | |
| 171 r->filter_need_in_memory = 1; | |
| 172 | |
| 173 r->headers_out.content_encoding->hash = 0; | |
| 174 r->headers_out.content_encoding = NULL; | |
| 175 | |
| 176 ngx_http_clear_content_length(r); | |
| 177 ngx_http_clear_accept_ranges(r); | |
| 178 | |
| 179 return ngx_http_next_header_filter(r); | |
| 180 } | |
| 181 | |
| 182 | |
| 183 static ngx_int_t | |
| 184 ngx_http_gunzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 185 { | |
| 186 int rc; | |
| 187 ngx_chain_t *cl; | |
| 188 ngx_http_gunzip_ctx_t *ctx; | |
| 189 | |
| 190 ctx = ngx_http_get_module_ctx(r, ngx_http_gunzip_filter_module); | |
| 191 | |
| 192 if (ctx == NULL || ctx->done) { | |
| 193 return ngx_http_next_body_filter(r, in); | |
| 194 } | |
| 195 | |
| 196 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 197 "http gunzip filter"); | |
| 198 | |
| 199 if (!ctx->started) { | |
| 200 if (ngx_http_gunzip_filter_inflate_start(r, ctx) != NGX_OK) { | |
| 201 goto failed; | |
| 202 } | |
| 203 } | |
| 204 | |
| 205 if (in) { | |
| 206 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { | |
| 207 goto failed; | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 if (ctx->nomem) { | |
| 212 | |
| 213 /* flush busy buffers */ | |
| 214 | |
| 215 if (ngx_http_next_body_filter(r, NULL) == NGX_ERROR) { | |
| 216 goto failed; | |
| 217 } | |
| 218 | |
| 219 cl = NULL; | |
| 220 | |
| 221 ngx_chain_update_chains(&ctx->free, &ctx->busy, &cl, | |
| 222 (ngx_buf_tag_t) &ngx_http_gunzip_filter_module); | |
| 223 ctx->nomem = 0; | |
| 224 } | |
| 225 | |
| 226 for ( ;; ) { | |
| 227 | |
| 228 /* cycle while we can write to a client */ | |
| 229 | |
| 230 for ( ;; ) { | |
| 231 | |
| 232 /* cycle while there is data to feed zlib and ... */ | |
| 233 | |
| 234 rc = ngx_http_gunzip_filter_add_data(r, ctx); | |
| 235 | |
| 236 if (rc == NGX_DECLINED) { | |
| 237 break; | |
| 238 } | |
| 239 | |
| 240 if (rc == NGX_AGAIN) { | |
| 241 continue; | |
| 242 } | |
| 243 | |
| 244 | |
| 245 /* ... there are buffers to write zlib output */ | |
| 246 | |
| 247 rc = ngx_http_gunzip_filter_get_buf(r, ctx); | |
| 248 | |
| 249 if (rc == NGX_DECLINED) { | |
| 250 break; | |
| 251 } | |
| 252 | |
| 253 if (rc == NGX_ERROR) { | |
| 254 goto failed; | |
| 255 } | |
| 256 | |
| 257 rc = ngx_http_gunzip_filter_inflate(r, ctx); | |
| 258 | |
| 259 if (rc == NGX_OK) { | |
| 260 break; | |
| 261 } | |
| 262 | |
| 263 if (rc == NGX_ERROR) { | |
| 264 goto failed; | |
| 265 } | |
| 266 | |
| 267 /* rc == NGX_AGAIN */ | |
| 268 } | |
| 269 | |
| 270 if (ctx->out == NULL) { | |
| 271 return ctx->busy ? NGX_AGAIN : NGX_OK; | |
| 272 } | |
| 273 | |
| 274 rc = ngx_http_next_body_filter(r, ctx->out); | |
| 275 | |
| 276 if (rc == NGX_ERROR) { | |
| 277 goto failed; | |
| 278 } | |
| 279 | |
| 280 ngx_chain_update_chains(&ctx->free, &ctx->busy, &ctx->out, | |
| 281 (ngx_buf_tag_t) &ngx_http_gunzip_filter_module); | |
| 282 ctx->last_out = &ctx->out; | |
| 283 | |
| 284 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 285 "gunzip out: %p", ctx->out); | |
| 286 | |
| 287 ctx->nomem = 0; | |
| 288 | |
| 289 if (ctx->done) { | |
| 290 return rc; | |
| 291 } | |
| 292 } | |
| 293 | |
| 294 /* unreachable */ | |
| 295 | |
| 296 failed: | |
| 297 | |
| 298 ctx->done = 1; | |
| 299 | |
| 300 return NGX_ERROR; | |
| 301 } | |
| 302 | |
| 303 | |
| 304 static ngx_int_t | |
| 305 ngx_http_gunzip_filter_inflate_start(ngx_http_request_t *r, | |
| 306 ngx_http_gunzip_ctx_t *ctx) | |
| 307 { | |
| 308 int rc; | |
| 309 | |
| 310 ctx->zstream.next_in = Z_NULL; | |
| 311 ctx->zstream.avail_in = 0; | |
| 312 | |
| 313 ctx->zstream.zalloc = ngx_http_gunzip_filter_alloc; | |
| 314 ctx->zstream.zfree = ngx_http_gunzip_filter_free; | |
| 315 ctx->zstream.opaque = ctx; | |
| 316 | |
| 317 /* windowBits +16 to decode gzip, zlib 1.2.0.4+ */ | |
| 318 rc = inflateInit2(&ctx->zstream, MAX_WBITS + 16); | |
| 319 | |
| 320 if (rc != Z_OK) { | |
| 321 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 322 "inflateInit2() failed: %d", rc); | |
| 323 return NGX_ERROR; | |
| 324 } | |
| 325 | |
| 326 ctx->started = 1; | |
| 327 | |
| 328 ctx->last_out = &ctx->out; | |
| 329 ctx->flush = Z_NO_FLUSH; | |
| 330 | |
| 331 return NGX_OK; | |
| 332 } | |
| 333 | |
| 334 | |
| 335 static ngx_int_t | |
| 336 ngx_http_gunzip_filter_add_data(ngx_http_request_t *r, | |
| 337 ngx_http_gunzip_ctx_t *ctx) | |
| 338 { | |
| 339 if (ctx->zstream.avail_in || ctx->flush != Z_NO_FLUSH || ctx->redo) { | |
| 340 return NGX_OK; | |
| 341 } | |
| 342 | |
| 343 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 344 "gunzip in: %p", ctx->in); | |
| 345 | |
| 346 if (ctx->in == NULL) { | |
| 347 return NGX_DECLINED; | |
| 348 } | |
| 349 | |
| 350 ctx->in_buf = ctx->in->buf; | |
| 351 ctx->in = ctx->in->next; | |
| 352 | |
| 353 ctx->zstream.next_in = ctx->in_buf->pos; | |
| 354 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos; | |
| 355 | |
| 356 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 357 "gunzip in_buf:%p ni:%p ai:%ud", | |
| 358 ctx->in_buf, | |
| 359 ctx->zstream.next_in, ctx->zstream.avail_in); | |
| 360 | |
| 361 if (ctx->in_buf->last_buf || ctx->in_buf->last_in_chain) { | |
| 362 ctx->flush = Z_FINISH; | |
| 363 | |
| 364 } else if (ctx->in_buf->flush) { | |
| 365 ctx->flush = Z_SYNC_FLUSH; | |
| 366 | |
| 367 } else if (ctx->zstream.avail_in == 0) { | |
| 368 /* ctx->flush == Z_NO_FLUSH */ | |
| 369 return NGX_AGAIN; | |
| 370 } | |
| 371 | |
| 372 return NGX_OK; | |
| 373 } | |
| 374 | |
| 375 | |
| 376 static ngx_int_t | |
| 377 ngx_http_gunzip_filter_get_buf(ngx_http_request_t *r, | |
| 378 ngx_http_gunzip_ctx_t *ctx) | |
| 379 { | |
| 380 ngx_http_gunzip_conf_t *conf; | |
| 381 | |
| 382 if (ctx->zstream.avail_out) { | |
| 383 return NGX_OK; | |
| 384 } | |
| 385 | |
| 386 conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module); | |
| 387 | |
| 388 if (ctx->free) { | |
| 389 ctx->out_buf = ctx->free->buf; | |
| 390 ctx->free = ctx->free->next; | |
| 391 | |
| 392 ctx->out_buf->flush = 0; | |
| 393 | |
| 394 } else if (ctx->bufs < conf->bufs.num) { | |
| 395 | |
| 396 ctx->out_buf = ngx_create_temp_buf(r->pool, conf->bufs.size); | |
| 397 if (ctx->out_buf == NULL) { | |
| 398 return NGX_ERROR; | |
| 399 } | |
| 400 | |
| 401 ctx->out_buf->tag = (ngx_buf_tag_t) &ngx_http_gunzip_filter_module; | |
| 402 ctx->out_buf->recycled = 1; | |
| 403 ctx->bufs++; | |
| 404 | |
| 405 } else { | |
| 406 ctx->nomem = 1; | |
| 407 return NGX_DECLINED; | |
| 408 } | |
| 409 | |
| 410 ctx->zstream.next_out = ctx->out_buf->pos; | |
| 411 ctx->zstream.avail_out = conf->bufs.size; | |
| 412 | |
| 413 return NGX_OK; | |
| 414 } | |
| 415 | |
| 416 | |
| 417 static ngx_int_t | |
| 418 ngx_http_gunzip_filter_inflate(ngx_http_request_t *r, | |
| 419 ngx_http_gunzip_ctx_t *ctx) | |
| 420 { | |
| 421 int rc; | |
| 422 ngx_buf_t *b; | |
| 423 ngx_chain_t *cl; | |
| 424 | |
| 425 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 426 "inflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d", | |
| 427 ctx->zstream.next_in, ctx->zstream.next_out, | |
| 428 ctx->zstream.avail_in, ctx->zstream.avail_out, | |
| 429 ctx->flush, ctx->redo); | |
| 430 | |
| 431 rc = inflate(&ctx->zstream, ctx->flush); | |
| 432 | |
| 433 if (rc != Z_OK && rc != Z_STREAM_END && rc != Z_BUF_ERROR) { | |
| 434 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 435 "inflate() failed: %d, %d", ctx->flush, rc); | |
| 436 return NGX_ERROR; | |
| 437 } | |
| 438 | |
| 439 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 440 "inflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d", | |
| 441 ctx->zstream.next_in, ctx->zstream.next_out, | |
| 442 ctx->zstream.avail_in, ctx->zstream.avail_out, | |
| 443 rc); | |
| 444 | |
| 445 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 446 "gunzip in_buf:%p pos:%p", | |
| 447 ctx->in_buf, ctx->in_buf->pos); | |
| 448 | |
| 449 if (ctx->zstream.next_in) { | |
| 450 ctx->in_buf->pos = ctx->zstream.next_in; | |
| 451 | |
| 452 if (ctx->zstream.avail_in == 0) { | |
| 453 ctx->zstream.next_in = NULL; | |
| 454 } | |
| 455 } | |
| 456 | |
| 457 ctx->out_buf->last = ctx->zstream.next_out; | |
| 458 | |
| 459 if (ctx->zstream.avail_out == 0) { | |
| 460 | |
| 461 /* zlib wants to output some more data */ | |
| 462 | |
| 463 cl = ngx_alloc_chain_link(r->pool); | |
| 464 if (cl == NULL) { | |
| 465 return NGX_ERROR; | |
| 466 } | |
| 467 | |
| 468 cl->buf = ctx->out_buf; | |
| 469 cl->next = NULL; | |
| 470 *ctx->last_out = cl; | |
| 471 ctx->last_out = &cl->next; | |
| 472 | |
| 473 ctx->redo = 1; | |
| 474 | |
| 475 return NGX_AGAIN; | |
| 476 } | |
| 477 | |
| 478 ctx->redo = 0; | |
| 479 | |
| 480 if (ctx->flush == Z_SYNC_FLUSH) { | |
| 481 | |
| 482 ctx->flush = Z_NO_FLUSH; | |
| 483 | |
| 484 cl = ngx_alloc_chain_link(r->pool); | |
| 485 if (cl == NULL) { | |
| 486 return NGX_ERROR; | |
| 487 } | |
| 488 | |
| 489 b = ctx->out_buf; | |
| 490 | |
| 491 if (ngx_buf_size(b) == 0) { | |
| 492 | |
| 493 b = ngx_calloc_buf(ctx->request->pool); | |
| 494 if (b == NULL) { | |
| 495 return NGX_ERROR; | |
| 496 } | |
| 497 | |
| 498 } else { | |
| 499 ctx->zstream.avail_out = 0; | |
| 500 } | |
| 501 | |
| 502 b->flush = 1; | |
| 503 | |
| 504 cl->buf = b; | |
| 505 cl->next = NULL; | |
| 506 *ctx->last_out = cl; | |
| 507 ctx->last_out = &cl->next; | |
| 508 | |
| 509 return NGX_OK; | |
| 510 } | |
| 511 | |
| 512 if (rc == Z_STREAM_END && ctx->flush == Z_FINISH | |
| 513 && ctx->zstream.avail_in == 0) | |
| 514 { | |
| 515 | |
| 516 if (ngx_http_gunzip_filter_inflate_end(r, ctx) != NGX_OK) { | |
| 517 return NGX_ERROR; | |
| 518 } | |
| 519 | |
| 520 return NGX_OK; | |
| 521 } | |
| 522 | |
| 523 if (rc == Z_STREAM_END && ctx->zstream.avail_in > 0) { | |
| 524 | |
| 525 rc = inflateReset(&ctx->zstream); | |
| 526 | |
| 527 if (rc != Z_OK) { | |
| 528 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 529 "inflateReset() failed: %d", rc); | |
| 530 return NGX_ERROR; | |
| 531 } | |
| 532 | |
| 533 ctx->redo = 1; | |
| 534 | |
| 535 return NGX_AGAIN; | |
| 536 } | |
| 537 | |
| 538 if (ctx->in == NULL) { | |
| 539 | |
| 540 cl = ngx_alloc_chain_link(r->pool); | |
| 541 if (cl == NULL) { | |
| 542 return NGX_ERROR; | |
| 543 } | |
| 544 | |
| 545 b = ctx->out_buf; | |
| 546 | |
| 547 if (ngx_buf_size(b) == 0) { | |
| 548 | |
| 549 b = ngx_calloc_buf(ctx->request->pool); | |
| 550 if (b == NULL) { | |
| 551 return NGX_ERROR; | |
| 552 } | |
| 553 | |
| 554 } else { | |
| 555 ctx->zstream.avail_out = 0; | |
| 556 } | |
| 557 | |
| 558 cl->buf = b; | |
| 559 cl->next = NULL; | |
| 560 *ctx->last_out = cl; | |
| 561 ctx->last_out = &cl->next; | |
| 562 | |
| 563 return NGX_OK; | |
| 564 } | |
| 565 | |
| 566 return NGX_AGAIN; | |
| 567 } | |
| 568 | |
| 569 | |
| 570 static ngx_int_t | |
| 571 ngx_http_gunzip_filter_inflate_end(ngx_http_request_t *r, | |
| 572 ngx_http_gunzip_ctx_t *ctx) | |
| 573 { | |
| 574 int rc; | |
| 575 ngx_buf_t *b; | |
| 576 ngx_chain_t *cl; | |
| 577 | |
| 578 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 579 "gunzip inflate end"); | |
| 580 | |
| 581 rc = inflateEnd(&ctx->zstream); | |
| 582 | |
| 583 if (rc != Z_OK) { | |
| 584 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 585 "inflateEnd() failed: %d", rc); | |
| 586 return NGX_ERROR; | |
| 587 } | |
| 588 | |
| 589 b = ctx->out_buf; | |
| 590 | |
| 591 if (ngx_buf_size(b) == 0) { | |
| 592 | |
| 593 b = ngx_calloc_buf(ctx->request->pool); | |
| 594 if (b == NULL) { | |
| 595 return NGX_ERROR; | |
| 596 } | |
| 597 } | |
| 598 | |
| 599 cl = ngx_alloc_chain_link(r->pool); | |
| 600 if (cl == NULL) { | |
| 601 return NGX_ERROR; | |
| 602 } | |
| 603 | |
| 604 cl->buf = b; | |
| 605 cl->next = NULL; | |
| 606 *ctx->last_out = cl; | |
| 607 ctx->last_out = &cl->next; | |
| 608 | |
| 609 b->last_buf = (r == r->main) ? 1 : 0; | |
| 610 b->last_in_chain = 1; | |
| 611 b->sync = 1; | |
| 612 | |
| 613 ctx->done = 1; | |
| 614 | |
| 615 return NGX_OK; | |
| 616 } | |
| 617 | |
| 618 | |
| 619 static void * | |
| 620 ngx_http_gunzip_filter_alloc(void *opaque, u_int items, u_int size) | |
| 621 { | |
| 622 ngx_http_gunzip_ctx_t *ctx = opaque; | |
| 623 | |
| 624 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
| 625 "gunzip alloc: n:%ud s:%ud", | |
| 626 items, size); | |
| 627 | |
| 628 return ngx_palloc(ctx->request->pool, items * size); | |
| 629 } | |
| 630 | |
| 631 | |
| 632 static void | |
| 633 ngx_http_gunzip_filter_free(void *opaque, void *address) | |
| 634 { | |
| 635 #if 0 | |
| 636 ngx_http_gunzip_ctx_t *ctx = opaque; | |
| 637 | |
| 638 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
| 639 "gunzip free: %p", address); | |
| 640 #endif | |
| 641 } | |
| 642 | |
| 643 | |
| 644 static void * | |
| 645 ngx_http_gunzip_create_conf(ngx_conf_t *cf) | |
| 646 { | |
| 647 ngx_http_gunzip_conf_t *conf; | |
| 648 | |
| 649 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gunzip_conf_t)); | |
| 650 if (conf == NULL) { | |
| 651 return NULL; | |
| 652 } | |
| 653 | |
| 654 /* | |
| 655 * set by ngx_pcalloc(): | |
| 656 * | |
| 657 * conf->bufs.num = 0; | |
| 658 */ | |
| 659 | |
| 660 conf->enable = NGX_CONF_UNSET; | |
| 661 | |
| 662 return conf; | |
| 663 } | |
| 664 | |
| 665 | |
| 666 static char * | |
| 667 ngx_http_gunzip_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 668 { | |
| 669 ngx_http_gunzip_conf_t *prev = parent; | |
| 670 ngx_http_gunzip_conf_t *conf = child; | |
| 671 | |
| 672 ngx_conf_merge_value(conf->enable, prev->enable, 0); | |
| 673 | |
| 674 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, | |
| 675 (128 * 1024) / ngx_pagesize, ngx_pagesize); | |
| 676 | |
| 677 return NGX_CONF_OK; | |
| 678 } | |
| 679 | |
| 680 | |
| 681 static ngx_int_t | |
| 682 ngx_http_gunzip_filter_init(ngx_conf_t *cf) | |
| 683 { | |
| 684 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 685 ngx_http_top_header_filter = ngx_http_gunzip_header_filter; | |
| 686 | |
| 687 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 688 ngx_http_top_body_filter = ngx_http_gunzip_body_filter; | |
| 689 | |
| 690 return NGX_OK; | |
| 691 } |