Mercurial > hg > nginx-ranges
annotate src/http/modules/ngx_http_range_filter_module.c @ 390:a5f67d82aea3
Range filter: support for multiple buffers (single range only).
This partially allows range support for replies that aren't sent in single
buffer. More work still required to support multipart/byteranges replies
(when client asks for multiple ranges in one request).
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 21 Jul 2008 05:31:34 +0400 |
| parents | 984bb0b1399b |
| children | 1d9bef53cd8e |
| rev | line source |
|---|---|
| 50 | 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 /* | |
| 13 * the single part format: | |
| 14 * | |
| 15 * "HTTP/1.0 206 Partial Content" CRLF | |
| 16 * ... header ... | |
| 17 * "Content-Type: image/jpeg" CRLF | |
| 18 * "Content-Length: SIZE" CRLF | |
| 19 * "Content-Range: bytes START-END/SIZE" CRLF | |
| 20 * CRLF | |
| 21 * ... data ... | |
| 22 * | |
| 23 * | |
| 24 * the mutlipart format: | |
| 25 * | |
| 26 * "HTTP/1.0 206 Partial Content" CRLF | |
| 27 * ... header ... | |
| 28 * "Content-Type: multipart/byteranges; boundary=0123456789" CRLF | |
| 29 * CRLF | |
| 30 * CRLF | |
| 31 * "--0123456789" CRLF | |
| 32 * "Content-Type: image/jpeg" CRLF | |
| 33 * "Content-Range: bytes START0-END0/SIZE" CRLF | |
| 34 * CRLF | |
| 35 * ... data ... | |
| 36 * CRLF | |
| 37 * "--0123456789" CRLF | |
| 38 * "Content-Type: image/jpeg" CRLF | |
| 39 * "Content-Range: bytes START1-END1/SIZE" CRLF | |
| 40 * CRLF | |
| 41 * ... data ... | |
| 42 * CRLF | |
| 43 * "--0123456789--" CRLF | |
| 44 */ | |
| 45 | |
| 46 | |
| 47 typedef struct { | |
| 272 | 48 off_t start; |
| 49 off_t end; | |
| 50 ngx_str_t content_range; | |
| 51 } ngx_http_range_t; | |
| 52 | |
| 53 | |
| 54 typedef struct { | |
| 55 off_t offset; | |
| 56 ngx_str_t boundary_header; | |
| 57 ngx_array_t ranges; | |
| 50 | 58 } ngx_http_range_filter_ctx_t; |
| 59 | |
| 60 | |
| 230 | 61 static ngx_int_t ngx_http_range_header_filter_init(ngx_conf_t *cf); |
| 62 static ngx_int_t ngx_http_range_body_filter_init(ngx_conf_t *cf); | |
| 50 | 63 |
| 64 | |
| 65 static ngx_http_module_t ngx_http_range_header_filter_module_ctx = { | |
| 58 | 66 NULL, /* preconfiguration */ |
| 230 | 67 ngx_http_range_header_filter_init, /* postconfiguration */ |
| 50 | 68 |
| 69 NULL, /* create main configuration */ | |
| 70 NULL, /* init main configuration */ | |
| 71 | |
| 72 NULL, /* create server configuration */ | |
| 73 NULL, /* merge server configuration */ | |
| 74 | |
| 75 NULL, /* create location configuration */ | |
| 76 NULL, /* merge location configuration */ | |
| 77 }; | |
| 78 | |
| 79 | |
| 80 ngx_module_t ngx_http_range_header_filter_module = { | |
| 58 | 81 NGX_MODULE_V1, |
| 50 | 82 &ngx_http_range_header_filter_module_ctx, /* module context */ |
| 83 NULL, /* module directives */ | |
| 84 NGX_HTTP_MODULE, /* module type */ | |
| 90 | 85 NULL, /* init master */ |
| 230 | 86 NULL, /* init module */ |
| 90 | 87 NULL, /* init process */ |
| 88 NULL, /* init thread */ | |
| 89 NULL, /* exit thread */ | |
| 90 NULL, /* exit process */ | |
| 91 NULL, /* exit master */ | |
| 92 NGX_MODULE_V1_PADDING | |
| 50 | 93 }; |
| 94 | |
| 95 | |
| 96 static ngx_http_module_t ngx_http_range_body_filter_module_ctx = { | |
| 58 | 97 NULL, /* preconfiguration */ |
| 230 | 98 ngx_http_range_body_filter_init, /* postconfiguration */ |
| 50 | 99 |
| 100 NULL, /* create main configuration */ | |
| 101 NULL, /* init main configuration */ | |
| 102 | |
| 103 NULL, /* create server configuration */ | |
| 104 NULL, /* merge server configuration */ | |
| 105 | |
| 106 NULL, /* create location configuration */ | |
| 107 NULL, /* merge location configuration */ | |
| 108 }; | |
| 109 | |
| 110 | |
| 111 ngx_module_t ngx_http_range_body_filter_module = { | |
| 58 | 112 NGX_MODULE_V1, |
| 50 | 113 &ngx_http_range_body_filter_module_ctx, /* module context */ |
| 114 NULL, /* module directives */ | |
| 115 NGX_HTTP_MODULE, /* module type */ | |
| 90 | 116 NULL, /* init master */ |
| 230 | 117 NULL, /* init module */ |
| 90 | 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 | |
| 50 | 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_range_header_filter(ngx_http_request_t *r) | |
| 133 { | |
| 134 u_char *p; | |
| 135 size_t len; | |
| 136 off_t start, end; | |
| 346 | 137 time_t if_range; |
| 50 | 138 ngx_int_t rc; |
| 139 ngx_uint_t suffix, i; | |
| 140 ngx_atomic_uint_t boundary; | |
| 141 ngx_table_elt_t *content_range; | |
| 142 ngx_http_range_t *range; | |
| 143 ngx_http_range_filter_ctx_t *ctx; | |
| 144 | |
| 145 if (r->http_version < NGX_HTTP_VERSION_10 | |
| 146 || r->headers_out.status != NGX_HTTP_OK | |
| 146 | 147 || r != r->main |
| 50 | 148 || r->headers_out.content_length_n == -1 |
| 130 | 149 || !r->allow_ranges) |
| 50 | 150 { |
| 151 return ngx_http_next_header_filter(r); | |
| 152 } | |
| 153 | |
| 154 if (r->headers_in.range == NULL | |
| 155 || r->headers_in.range->value.len < 7 | |
| 286 | 156 || ngx_strncasecmp(r->headers_in.range->value.data, |
| 157 (u_char *) "bytes=", 6) | |
| 158 != 0) | |
| 50 | 159 { |
| 346 | 160 goto next_filter; |
| 161 } | |
| 162 | |
| 163 if (r->headers_in.if_range && r->headers_out.last_modified_time != -1) { | |
| 164 | |
| 165 if_range = ngx_http_parse_time(r->headers_in.if_range->value.data, | |
| 166 r->headers_in.if_range->value.len); | |
| 50 | 167 |
| 346 | 168 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| 169 "http ir:%d lm:%d", | |
| 170 if_range, r->headers_out.last_modified_time); | |
| 50 | 171 |
| 346 | 172 if (if_range != r->headers_out.last_modified_time) { |
| 173 goto next_filter; | |
| 174 } | |
| 50 | 175 } |
| 176 | |
| 272 | 177 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_range_filter_ctx_t)); |
| 178 if (ctx == NULL) { | |
| 179 return NGX_ERROR; | |
| 180 } | |
| 181 | |
| 182 if (ngx_array_init(&ctx->ranges, r->pool, 1, sizeof(ngx_http_range_t)) | |
| 183 == NGX_ERROR) | |
| 50 | 184 { |
| 185 return NGX_ERROR; | |
| 186 } | |
| 187 | |
| 188 rc = 0; | |
| 189 range = NULL; | |
| 190 p = r->headers_in.range->value.data + 6; | |
| 191 | |
| 192 for ( ;; ) { | |
| 193 start = 0; | |
| 194 end = 0; | |
| 195 suffix = 0; | |
| 196 | |
| 197 while (*p == ' ') { p++; } | |
| 198 | |
| 199 if (*p != '-') { | |
| 200 if (*p < '0' || *p > '9') { | |
| 201 rc = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 202 break; | |
| 203 } | |
| 204 | |
| 205 while (*p >= '0' && *p <= '9') { | |
| 206 start = start * 10 + *p++ - '0'; | |
| 207 } | |
| 208 | |
| 209 while (*p == ' ') { p++; } | |
| 210 | |
| 211 if (*p++ != '-') { | |
| 212 rc = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 213 break; | |
| 214 } | |
| 215 | |
| 216 if (start >= r->headers_out.content_length_n) { | |
| 217 rc = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 218 break; | |
| 219 } | |
| 220 | |
| 221 while (*p == ' ') { p++; } | |
| 222 | |
| 223 if (*p == ',' || *p == '\0') { | |
| 272 | 224 range = ngx_array_push(&ctx->ranges); |
| 50 | 225 if (range == NULL) { |
| 226 return NGX_ERROR; | |
| 227 } | |
| 228 | |
| 229 range->start = start; | |
| 230 range->end = r->headers_out.content_length_n; | |
| 231 | |
| 232 if (*p++ != ',') { | |
| 233 break; | |
| 234 } | |
| 235 | |
| 236 continue; | |
| 237 } | |
| 238 | |
| 239 } else { | |
| 240 suffix = 1; | |
| 241 p++; | |
| 242 } | |
| 243 | |
| 244 if (*p < '0' || *p > '9') { | |
| 245 rc = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 246 break; | |
| 247 } | |
| 248 | |
| 249 while (*p >= '0' && *p <= '9') { | |
| 250 end = end * 10 + *p++ - '0'; | |
| 251 } | |
| 252 | |
| 253 while (*p == ' ') { p++; } | |
| 254 | |
| 255 if (*p != ',' && *p != '\0') { | |
| 256 rc = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 257 break; | |
| 258 } | |
| 259 | |
| 260 if (suffix) { | |
| 261 start = r->headers_out.content_length_n - end; | |
| 262 end = r->headers_out.content_length_n - 1; | |
| 263 } | |
| 264 | |
| 265 if (start > end) { | |
| 266 rc = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 267 break; | |
| 268 } | |
| 269 | |
| 272 | 270 range = ngx_array_push(&ctx->ranges); |
| 50 | 271 if (range == NULL) { |
| 272 return NGX_ERROR; | |
| 273 } | |
| 274 | |
| 275 range->start = start; | |
| 276 | |
| 277 if (end >= r->headers_out.content_length_n) { | |
| 278 /* | |
| 279 * Download Accelerator sends the last byte position | |
| 280 * that equals to the file length | |
| 281 */ | |
| 282 range->end = r->headers_out.content_length_n; | |
| 283 | |
| 284 } else { | |
| 285 range->end = end + 1; | |
| 286 } | |
| 287 | |
| 288 if (*p++ != ',') { | |
| 289 break; | |
| 290 } | |
| 291 } | |
| 292 | |
| 293 if (rc) { | |
| 294 | |
| 295 /* rc == NGX_HTTP_RANGE_NOT_SATISFIABLE */ | |
| 296 | |
| 297 r->headers_out.status = rc; | |
| 298 | |
| 299 content_range = ngx_list_push(&r->headers_out.headers); | |
| 300 if (content_range == NULL) { | |
| 301 return NGX_ERROR; | |
| 302 } | |
| 303 | |
| 304 r->headers_out.content_range = content_range; | |
| 305 | |
| 58 | 306 content_range->hash = 1; |
| 50 | 307 content_range->key.len = sizeof("Content-Range") - 1; |
| 308 content_range->key.data = (u_char *) "Content-Range"; | |
| 309 | |
| 382 | 310 content_range->value.data = ngx_pnalloc(r->pool, |
| 50 | 311 sizeof("bytes */") - 1 + NGX_OFF_T_LEN); |
| 312 if (content_range->value.data == NULL) { | |
| 313 return NGX_ERROR; | |
| 314 } | |
| 315 | |
| 316 content_range->value.len = ngx_sprintf(content_range->value.data, | |
| 317 "bytes */%O", | |
| 318 r->headers_out.content_length_n) | |
| 319 - content_range->value.data; | |
| 320 | |
| 126 | 321 ngx_http_clear_content_length(r); |
| 50 | 322 |
| 323 return rc; | |
| 324 } | |
| 325 | |
| 272 | 326 ngx_http_set_ctx(r, ctx, ngx_http_range_body_filter_module); |
| 327 | |
| 50 | 328 r->headers_out.status = NGX_HTTP_PARTIAL_CONTENT; |
| 329 | |
| 272 | 330 if (ctx->ranges.nelts == 1) { |
| 50 | 331 |
| 332 content_range = ngx_list_push(&r->headers_out.headers); | |
| 333 if (content_range == NULL) { | |
| 334 return NGX_ERROR; | |
| 335 } | |
| 336 | |
| 337 r->headers_out.content_range = content_range; | |
| 338 | |
| 58 | 339 content_range->hash = 1; |
| 50 | 340 content_range->key.len = sizeof("Content-Range") - 1; |
| 341 content_range->key.data = (u_char *) "Content-Range"; | |
| 342 | |
| 343 content_range->value.data = | |
| 382 | 344 ngx_pnalloc(r->pool, sizeof("bytes -/") - 1 + 3 * NGX_OFF_T_LEN); |
| 50 | 345 if (content_range->value.data == NULL) { |
| 346 return NGX_ERROR; | |
| 347 } | |
| 348 | |
| 349 /* "Content-Range: bytes SSSS-EEEE/TTTT" header */ | |
| 350 | |
| 351 content_range->value.len = ngx_sprintf(content_range->value.data, | |
| 352 "bytes %O-%O/%O", | |
| 353 range->start, range->end - 1, | |
| 354 r->headers_out.content_length_n) | |
| 355 - content_range->value.data; | |
| 356 | |
| 357 r->headers_out.content_length_n = range->end - range->start; | |
| 358 | |
| 272 | 359 if (r->headers_out.content_length) { |
| 360 r->headers_out.content_length->hash = 0; | |
| 361 r->headers_out.content_length = NULL; | |
| 362 } | |
| 363 | |
| 50 | 364 return ngx_http_next_header_filter(r); |
| 365 } | |
| 366 | |
| 367 | |
| 368 /* TODO: what if no content_type ?? */ | |
| 369 | |
| 370 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN | |
| 371 + sizeof(CRLF "Content-Type: ") - 1 | |
| 58 | 372 + r->headers_out.content_type.len |
| 50 | 373 + sizeof(CRLF "Content-Range: bytes ") - 1; |
| 374 | |
| 375 if (r->headers_out.charset.len) { | |
| 376 len += sizeof("; charset=") - 1 + r->headers_out.charset.len; | |
| 377 } | |
| 378 | |
| 382 | 379 ctx->boundary_header.data = ngx_pnalloc(r->pool, len); |
| 50 | 380 if (ctx->boundary_header.data == NULL) { |
| 381 return NGX_ERROR; | |
| 382 } | |
| 383 | |
| 384 boundary = ngx_next_temp_number(0); | |
| 385 | |
| 386 /* | |
| 387 * The boundary header of the range: | |
| 388 * CRLF | |
| 389 * "--0123456789" CRLF | |
| 390 * "Content-Type: image/jpeg" CRLF | |
| 391 * "Content-Range: bytes " | |
| 392 */ | |
| 393 | |
| 394 if (r->headers_out.charset.len) { | |
| 395 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
| 396 CRLF "--%0muA" CRLF | |
| 397 "Content-Type: %V; charset=%V" CRLF | |
| 398 "Content-Range: bytes ", | |
| 399 boundary, | |
| 58 | 400 &r->headers_out.content_type, |
| 50 | 401 &r->headers_out.charset) |
| 402 - ctx->boundary_header.data; | |
| 403 | |
| 404 r->headers_out.charset.len = 0; | |
| 405 | |
| 406 } else { | |
| 407 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
| 408 CRLF "--%0muA" CRLF | |
| 409 "Content-Type: %V" CRLF | |
| 410 "Content-Range: bytes ", | |
| 411 boundary, | |
| 58 | 412 &r->headers_out.content_type) |
| 50 | 413 - ctx->boundary_header.data; |
| 414 } | |
| 415 | |
| 58 | 416 r->headers_out.content_type.data = |
| 382 | 417 ngx_pnalloc(r->pool, |
| 418 sizeof("Content-Type: multipart/byteranges; boundary=") - 1 | |
| 419 + NGX_ATOMIC_T_LEN); | |
| 50 | 420 |
| 58 | 421 if (r->headers_out.content_type.data == NULL) { |
| 50 | 422 return NGX_ERROR; |
| 423 } | |
| 424 | |
| 425 /* "Content-Type: multipart/byteranges; boundary=0123456789" */ | |
| 426 | |
| 58 | 427 r->headers_out.content_type.len = |
| 428 ngx_sprintf(r->headers_out.content_type.data, | |
| 50 | 429 "multipart/byteranges; boundary=%0muA", |
| 430 boundary) | |
| 58 | 431 - r->headers_out.content_type.data; |
| 50 | 432 |
| 433 | |
| 434 /* the size of the last boundary CRLF "--0123456789--" CRLF */ | |
| 435 | |
| 436 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN + sizeof("--" CRLF) - 1; | |
| 437 | |
| 272 | 438 range = ctx->ranges.elts; |
| 439 for (i = 0; i < ctx->ranges.nelts; i++) { | |
| 50 | 440 |
| 441 /* the size of the range: "SSSS-EEEE/TTTT" CRLF CRLF */ | |
| 442 | |
| 443 range[i].content_range.data = | |
| 382 | 444 ngx_pnalloc(r->pool, 3 * NGX_OFF_T_LEN + 2 + 4); |
| 50 | 445 |
| 446 if (range[i].content_range.data == NULL) { | |
| 447 return NGX_ERROR; | |
| 448 } | |
| 449 | |
| 450 range[i].content_range.len = ngx_sprintf(range[i].content_range.data, | |
| 451 "%O-%O/%O" CRLF CRLF, | |
| 452 range[i].start, range[i].end - 1, | |
| 453 r->headers_out.content_length_n) | |
| 454 - range[i].content_range.data; | |
| 455 | |
| 456 len += ctx->boundary_header.len + range[i].content_range.len | |
| 457 + (size_t) (range[i].end - range[i].start); | |
| 458 } | |
| 459 | |
| 460 r->headers_out.content_length_n = len; | |
| 272 | 461 |
| 462 if (r->headers_out.content_length) { | |
| 463 r->headers_out.content_length->hash = 0; | |
| 464 r->headers_out.content_length = NULL; | |
| 465 } | |
| 50 | 466 |
| 467 return ngx_http_next_header_filter(r); | |
| 346 | 468 |
| 469 next_filter: | |
| 470 | |
| 471 r->headers_out.accept_ranges = ngx_list_push(&r->headers_out.headers); | |
| 472 if (r->headers_out.accept_ranges == NULL) { | |
| 473 return NGX_ERROR; | |
| 474 } | |
| 475 | |
| 476 r->headers_out.accept_ranges->hash = 1; | |
| 477 r->headers_out.accept_ranges->key.len = sizeof("Accept-Ranges") - 1; | |
| 478 r->headers_out.accept_ranges->key.data = (u_char *) "Accept-Ranges"; | |
| 479 r->headers_out.accept_ranges->value.len = sizeof("bytes") - 1; | |
| 480 r->headers_out.accept_ranges->value.data = (u_char *) "bytes"; | |
| 481 | |
| 482 return ngx_http_next_header_filter(r); | |
| 50 | 483 } |
| 484 | |
| 485 | |
| 486 static ngx_int_t | |
| 487 ngx_http_range_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 488 { | |
| 272 | 489 off_t start, last; |
| 490 ngx_buf_t *b, *buf; | |
| 50 | 491 ngx_uint_t i; |
|
390
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
492 ngx_chain_t *out, *cl, *hcl, *rcl, *dcl, **ll; |
| 50 | 493 ngx_http_range_t *range; |
| 494 ngx_http_range_filter_ctx_t *ctx; | |
| 495 | |
| 272 | 496 if (in == NULL) { |
| 497 return ngx_http_next_body_filter(r, in); | |
| 498 } | |
| 499 | |
| 500 ctx = ngx_http_get_module_ctx(r, ngx_http_range_body_filter_module); | |
| 501 | |
| 502 if (ctx == NULL) { | |
| 503 return ngx_http_next_body_filter(r, in); | |
| 504 } | |
| 505 | |
| 506 buf = in->buf; | |
| 507 | |
| 508 if (ngx_buf_special(in->buf)) { | |
| 50 | 509 return ngx_http_next_body_filter(r, in); |
| 510 } | |
| 511 | |
|
390
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
512 range = ctx->ranges.elts; |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
513 |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
514 if (ctx->ranges.nelts > 1) { |
|
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Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
515 goto multipart; |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
516 } |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
517 |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
518 /* |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
519 * the optimized version for the responses |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
520 * that are passed in the single buffer |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
521 */ |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
522 |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
523 out = NULL; |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
parents:
382
diff
changeset
|
524 ll = &out; |
|
a5f67d82aea3
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changeset
|
525 |
|
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526 for (cl = in; cl; cl = cl->next) { |
|
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|
527 |
|
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Range filter: support for multiple buffers (single range only).
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528 buf = cl->buf; |
|
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changeset
|
529 |
|
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diff
changeset
|
530 start = ctx->offset; |
|
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531 last = ctx->offset + ngx_buf_size(buf); |
|
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|
532 |
|
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Range filter: support for multiple buffers (single range only).
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533 ctx->offset = last; |
|
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|
534 |
|
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changeset
|
535 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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|
536 "range body filter: %O-%O", start, last); |
|
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changeset
|
537 |
|
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|
538 if (ngx_buf_special(buf)) { |
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539 /* pass anyway */ |
|
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Range filter: support for multiple buffers (single range only).
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540 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
|
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Range filter: support for multiple buffers (single range only).
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|
541 "range body filter: pass special"); |
|
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|
542 *ll = cl; |
|
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543 ll = &cl->next; |
|
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|
544 continue; |
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changeset
|
545 } |
|
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Range filter: support for multiple buffers (single range only).
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|
546 |
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547 if (range->end <= start || range->start >= last) { |
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|
548 /* skip buffer */ |
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|
549 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
|
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Range filter: support for multiple buffers (single range only).
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diff
changeset
|
550 "range body filter: skip"); |
|
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|
551 buf->pos = buf->last; |
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|
552 continue; |
|
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|
553 } |
|
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Range filter: support for multiple buffers (single range only).
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|
554 |
|
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Range filter: support for multiple buffers (single range only).
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|
555 if (range->start > start) { |
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|
556 if (buf->in_file) { |
|
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|
557 buf->file_pos += range->start - start; |
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|
558 } |
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Range filter: support for multiple buffers (single range only).
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|
559 if (ngx_buf_in_memory(buf)) { |
|
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Range filter: support for multiple buffers (single range only).
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|
560 buf->pos += (size_t) (range->start - start); |
|
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changeset
|
561 } |
|
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Range filter: support for multiple buffers (single range only).
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diff
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|
562 } |
|
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diff
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|
563 |
|
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Range filter: support for multiple buffers (single range only).
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diff
changeset
|
564 if (range->end <= last) { |
|
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Range filter: support for multiple buffers (single range only).
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|
565 if (buf->in_file) { |
|
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Range filter: support for multiple buffers (single range only).
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|
566 buf->file_last -= last - range->end; |
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Maxim Dounin <mdounin@mdounin.ru>
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|
567 } |
|
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Range filter: support for multiple buffers (single range only).
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|
568 if (ngx_buf_in_memory(buf)) { |
|
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Range filter: support for multiple buffers (single range only).
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changeset
|
569 buf->last -= (size_t) (last - range->end); |
|
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parents:
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diff
changeset
|
570 } |
|
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Range filter: support for multiple buffers (single range only).
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diff
changeset
|
571 |
|
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Range filter: support for multiple buffers (single range only).
Maxim Dounin <mdounin@mdounin.ru>
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changeset
|
572 /* we are done */ |
|
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Range filter: support for multiple buffers (single range only).
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diff
changeset
|
573 |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
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changeset
|
574 buf->last_buf = 1; |
|
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|
575 *ll = cl; |
|
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|
576 cl->next = NULL; |
|
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changeset
|
577 |
|
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Range filter: support for multiple buffers (single range only).
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changeset
|
578 break; |
|
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Range filter: support for multiple buffers (single range only).
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|
579 } |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
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diff
changeset
|
580 |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
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parents:
382
diff
changeset
|
581 *ll = cl; |
|
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|
582 ll = &cl->next; |
|
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|
583 } |
|
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Range filter: support for multiple buffers (single range only).
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changeset
|
584 |
|
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Range filter: support for multiple buffers (single range only).
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changeset
|
585 if (out == NULL) { |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
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diff
changeset
|
586 return NGX_OK; |
|
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Range filter: support for multiple buffers (single range only).
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diff
changeset
|
587 } |
|
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Range filter: support for multiple buffers (single range only).
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parents:
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diff
changeset
|
588 |
|
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Range filter: support for multiple buffers (single range only).
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changeset
|
589 return ngx_http_next_body_filter(r, out); |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
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parents:
382
diff
changeset
|
590 |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
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parents:
382
diff
changeset
|
591 multipart: |
|
a5f67d82aea3
Range filter: support for multiple buffers (single range only).
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diff
changeset
|
592 |
| 272 | 593 if (ctx->offset) { |
| 594 goto overlapped; | |
| 595 } | |
| 596 | |
| 597 if (!buf->last_buf) { | |
| 598 | |
| 599 if (buf->in_file) { | |
| 600 start = buf->file_pos + ctx->offset; | |
| 601 last = buf->file_last + ctx->offset; | |
| 602 | |
| 603 } else { | |
| 604 start = buf->pos - buf->start + ctx->offset; | |
| 605 last = buf->last - buf->start + ctx->offset; | |
| 606 } | |
| 607 | |
| 608 for (i = 0; i < ctx->ranges.nelts; i++) { | |
| 609 if (start > range[i].start || last < range[i].end) { | |
| 610 goto overlapped; | |
| 611 } | |
| 612 } | |
| 613 } | |
| 614 | |
| 615 ctx->offset = ngx_buf_size(buf); | |
| 616 | |
| 617 ll = &out; | |
| 618 | |
| 619 for (i = 0; i < ctx->ranges.nelts; i++) { | |
| 50 | 620 |
| 272 | 621 /* |
| 622 * The boundary header of the range: | |
| 623 * CRLF | |
| 624 * "--0123456789" CRLF | |
| 625 * "Content-Type: image/jpeg" CRLF | |
| 626 * "Content-Range: bytes " | |
| 627 */ | |
| 50 | 628 |
| 272 | 629 b = ngx_calloc_buf(r->pool); |
| 630 if (b == NULL) { | |
| 631 return NGX_ERROR; | |
| 632 } | |
| 50 | 633 |
| 272 | 634 b->memory = 1; |
| 635 b->pos = ctx->boundary_header.data; | |
| 636 b->last = ctx->boundary_header.data + ctx->boundary_header.len; | |
| 50 | 637 |
| 272 | 638 hcl = ngx_alloc_chain_link(r->pool); |
| 639 if (hcl == NULL) { | |
| 640 return NGX_ERROR; | |
| 641 } | |
| 50 | 642 |
| 272 | 643 hcl->buf = b; |
| 50 | 644 |
| 645 | |
| 272 | 646 /* "SSSS-EEEE/TTTT" CRLF CRLF */ |
| 50 | 647 |
| 648 b = ngx_calloc_buf(r->pool); | |
| 649 if (b == NULL) { | |
| 650 return NGX_ERROR; | |
| 651 } | |
| 652 | |
| 653 b->temporary = 1; | |
| 272 | 654 b->pos = range[i].content_range.data; |
| 655 b->last = range[i].content_range.data + range[i].content_range.len; | |
| 656 | |
| 657 rcl = ngx_alloc_chain_link(r->pool); | |
| 658 if (rcl == NULL) { | |
| 659 return NGX_ERROR; | |
| 660 } | |
| 661 | |
| 662 rcl->buf = b; | |
| 663 | |
| 664 | |
| 665 /* the range data */ | |
| 666 | |
| 667 b = ngx_calloc_buf(r->pool); | |
| 668 if (b == NULL) { | |
| 669 return NGX_ERROR; | |
| 670 } | |
| 50 | 671 |
| 272 | 672 b->in_file = buf->in_file; |
| 673 b->temporary = buf->temporary; | |
| 674 b->memory = buf->memory; | |
| 675 b->mmap = buf->mmap; | |
| 676 b->file = buf->file; | |
| 677 | |
| 678 if (buf->in_file) { | |
| 282 | 679 b->file_pos = range[i].start; |
| 680 b->file_last = range[i].end; | |
| 272 | 681 } |
| 682 | |
| 683 if (ngx_buf_in_memory(buf)) { | |
| 282 | 684 b->pos = buf->start + (size_t) range[i].start; |
| 685 b->last = buf->start + (size_t) range[i].end; | |
| 272 | 686 } |
| 687 | |
| 688 dcl = ngx_alloc_chain_link(r->pool); | |
| 689 if (dcl == NULL) { | |
| 50 | 690 return NGX_ERROR; |
| 691 } | |
| 692 | |
| 272 | 693 dcl->buf = b; |
| 50 | 694 |
| 695 *ll = hcl; | |
| 272 | 696 hcl->next = rcl; |
| 697 rcl->next = dcl; | |
| 698 ll = &dcl->next; | |
| 699 } | |
| 50 | 700 |
| 272 | 701 /* the last boundary CRLF "--0123456789--" CRLF */ |
| 702 | |
| 703 b = ngx_calloc_buf(r->pool); | |
| 704 if (b == NULL) { | |
| 705 return NGX_ERROR; | |
| 706 } | |
| 707 | |
| 708 b->temporary = 1; | |
| 709 b->last_buf = 1; | |
| 710 | |
| 382 | 711 b->pos = ngx_pnalloc(r->pool, sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN |
| 712 + sizeof("--" CRLF) - 1); | |
| 272 | 713 if (b->pos == NULL) { |
| 714 return NGX_ERROR; | |
| 50 | 715 } |
| 716 | |
| 300 | 717 b->last = ngx_cpymem(b->pos, ctx->boundary_header.data, |
| 718 sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN); | |
| 272 | 719 *b->last++ = '-'; *b->last++ = '-'; |
| 720 *b->last++ = CR; *b->last++ = LF; | |
| 721 | |
| 722 hcl = ngx_alloc_chain_link(r->pool); | |
| 723 if (hcl == NULL) { | |
| 724 return NGX_ERROR; | |
| 725 } | |
| 50 | 726 |
| 272 | 727 hcl->buf = b; |
| 728 hcl->next = NULL; | |
| 729 | |
| 730 *ll = hcl; | |
| 731 | |
| 732 return ngx_http_next_body_filter(r, out); | |
| 733 | |
| 734 overlapped: | |
| 735 | |
| 736 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 737 "range in overlapped buffers"); | |
| 738 | |
| 739 return NGX_ERROR; | |
| 50 | 740 } |
| 741 | |
| 742 | |
| 743 static ngx_int_t | |
| 230 | 744 ngx_http_range_header_filter_init(ngx_conf_t *cf) |
| 50 | 745 { |
| 746 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 747 ngx_http_top_header_filter = ngx_http_range_header_filter; | |
| 748 | |
| 749 return NGX_OK; | |
| 750 } | |
| 751 | |
| 752 | |
| 753 static ngx_int_t | |
| 230 | 754 ngx_http_range_body_filter_init(ngx_conf_t *cf) |
| 50 | 755 { |
| 756 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 757 ngx_http_top_body_filter = ngx_http_range_body_filter; | |
| 758 | |
| 759 return NGX_OK; | |
| 760 } |