Mercurial > hg > nginx-ranges
annotate src/http/modules/ngx_http_range_filter_module.c @ 635:e67b227c8dbb default tip
Merge with current.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 25 Apr 2011 04:07:55 +0400 |
| parents | 8fbdd980b527 8246d8a2c2be |
| children |
| 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 | |
| 392 | 61 ngx_int_t ngx_http_range_parse(ngx_http_request_t *r, |
| 62 ngx_http_range_filter_ctx_t *ctx); | |
| 63 static ngx_int_t ngx_http_range_singlepart_header(ngx_http_request_t *r, | |
| 64 ngx_http_range_filter_ctx_t *ctx); | |
| 65 static ngx_int_t ngx_http_range_multipart_header(ngx_http_request_t *r, | |
| 66 ngx_http_range_filter_ctx_t *ctx); | |
| 67 static ngx_int_t ngx_http_range_not_satisfiable(ngx_http_request_t *r); | |
| 68 static ngx_int_t ngx_http_range_test_overlapped(ngx_http_request_t *r, | |
| 69 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in); | |
| 70 static ngx_int_t ngx_http_range_singlepart_body(ngx_http_request_t *r, | |
| 396 | 71 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in, |
| 72 ngx_http_output_body_filter_pt ngx_http_next_body_filter); | |
| 392 | 73 static ngx_int_t ngx_http_range_multipart_body(ngx_http_request_t *r, |
| 396 | 74 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in, |
| 75 ngx_http_output_body_filter_pt ngx_http_next_body_filter); | |
| 392 | 76 |
| 230 | 77 static ngx_int_t ngx_http_range_header_filter_init(ngx_conf_t *cf); |
| 78 static ngx_int_t ngx_http_range_body_filter_init(ngx_conf_t *cf); | |
|
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79 static ngx_int_t ngx_http_range_late_filter_init(ngx_conf_t *cf); |
| 50 | 80 |
| 81 | |
| 82 static ngx_http_module_t ngx_http_range_header_filter_module_ctx = { | |
| 58 | 83 NULL, /* preconfiguration */ |
| 230 | 84 ngx_http_range_header_filter_init, /* postconfiguration */ |
| 50 | 85 |
| 86 NULL, /* create main configuration */ | |
| 87 NULL, /* init main configuration */ | |
| 88 | |
| 89 NULL, /* create server configuration */ | |
| 90 NULL, /* merge server configuration */ | |
| 91 | |
| 92 NULL, /* create location configuration */ | |
| 93 NULL, /* merge location configuration */ | |
| 94 }; | |
| 95 | |
| 96 | |
| 97 ngx_module_t ngx_http_range_header_filter_module = { | |
| 58 | 98 NGX_MODULE_V1, |
| 50 | 99 &ngx_http_range_header_filter_module_ctx, /* module context */ |
| 100 NULL, /* module directives */ | |
| 101 NGX_HTTP_MODULE, /* module type */ | |
| 90 | 102 NULL, /* init master */ |
| 230 | 103 NULL, /* init module */ |
| 90 | 104 NULL, /* init process */ |
| 105 NULL, /* init thread */ | |
| 106 NULL, /* exit thread */ | |
| 107 NULL, /* exit process */ | |
| 108 NULL, /* exit master */ | |
| 109 NGX_MODULE_V1_PADDING | |
| 50 | 110 }; |
| 111 | |
| 112 | |
| 113 static ngx_http_module_t ngx_http_range_body_filter_module_ctx = { | |
| 58 | 114 NULL, /* preconfiguration */ |
| 230 | 115 ngx_http_range_body_filter_init, /* postconfiguration */ |
| 50 | 116 |
| 117 NULL, /* create main configuration */ | |
| 118 NULL, /* init main configuration */ | |
| 119 | |
| 120 NULL, /* create server configuration */ | |
| 121 NULL, /* merge server configuration */ | |
| 122 | |
| 123 NULL, /* create location configuration */ | |
| 124 NULL, /* merge location configuration */ | |
| 125 }; | |
| 126 | |
| 127 | |
| 128 ngx_module_t ngx_http_range_body_filter_module = { | |
| 58 | 129 NGX_MODULE_V1, |
| 50 | 130 &ngx_http_range_body_filter_module_ctx, /* module context */ |
| 131 NULL, /* module directives */ | |
| 132 NGX_HTTP_MODULE, /* module type */ | |
| 90 | 133 NULL, /* init master */ |
| 230 | 134 NULL, /* init module */ |
| 90 | 135 NULL, /* init process */ |
| 136 NULL, /* init thread */ | |
| 137 NULL, /* exit thread */ | |
| 138 NULL, /* exit process */ | |
| 139 NULL, /* exit master */ | |
| 140 NGX_MODULE_V1_PADDING | |
| 50 | 141 }; |
| 142 | |
| 143 | |
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144 static ngx_http_module_t ngx_http_range_late_filter_module_ctx = { |
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145 NULL, /* preconfiguration */ |
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146 ngx_http_range_late_filter_init, /* postconfiguration */ |
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147 |
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148 NULL, /* create main configuration */ |
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149 NULL, /* init main configuration */ |
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150 |
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151 NULL, /* create server configuration */ |
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152 NULL, /* merge server configuration */ |
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153 |
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154 NULL, /* create location configuration */ |
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155 NULL, /* merge location configuration */ |
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156 }; |
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157 |
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158 |
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159 ngx_module_t ngx_http_range_late_filter_module = { |
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160 NGX_MODULE_V1, |
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161 &ngx_http_range_late_filter_module_ctx, /* module context */ |
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162 NULL, /* module directives */ |
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163 NGX_HTTP_MODULE, /* module type */ |
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164 NULL, /* init master */ |
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165 NULL, /* init module */ |
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166 NULL, /* init process */ |
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167 NULL, /* init thread */ |
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168 NULL, /* exit thread */ |
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169 NULL, /* exit process */ |
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170 NULL, /* exit master */ |
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171 NGX_MODULE_V1_PADDING |
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172 }; |
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173 |
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174 |
| 50 | 175 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
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176 static ngx_http_output_body_filter_pt ngx_http_next_body_early_filter; |
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177 static ngx_http_output_body_filter_pt ngx_http_next_body_late_filter; |
| 50 | 178 |
| 179 | |
| 180 static ngx_int_t | |
| 181 ngx_http_range_header_filter(ngx_http_request_t *r) | |
| 182 { | |
| 346 | 183 time_t if_range; |
| 50 | 184 ngx_int_t rc; |
| 185 ngx_http_range_filter_ctx_t *ctx; | |
| 186 | |
| 187 if (r->http_version < NGX_HTTP_VERSION_10 | |
| 188 || r->headers_out.status != NGX_HTTP_OK | |
| 146 | 189 || r != r->main |
| 50 | 190 || r->headers_out.content_length_n == -1 |
| 130 | 191 || !r->allow_ranges) |
| 50 | 192 { |
| 193 return ngx_http_next_header_filter(r); | |
| 194 } | |
| 195 | |
| 196 if (r->headers_in.range == NULL | |
| 197 || r->headers_in.range->value.len < 7 | |
| 286 | 198 || ngx_strncasecmp(r->headers_in.range->value.data, |
| 199 (u_char *) "bytes=", 6) | |
| 200 != 0) | |
| 50 | 201 { |
| 346 | 202 goto next_filter; |
| 203 } | |
| 204 | |
| 205 if (r->headers_in.if_range && r->headers_out.last_modified_time != -1) { | |
| 206 | |
| 207 if_range = ngx_http_parse_time(r->headers_in.if_range->value.data, | |
| 208 r->headers_in.if_range->value.len); | |
| 50 | 209 |
| 346 | 210 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| 211 "http ir:%d lm:%d", | |
| 212 if_range, r->headers_out.last_modified_time); | |
| 50 | 213 |
| 346 | 214 if (if_range != r->headers_out.last_modified_time) { |
| 215 goto next_filter; | |
| 216 } | |
| 50 | 217 } |
| 218 | |
| 272 | 219 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_range_filter_ctx_t)); |
| 220 if (ctx == NULL) { | |
| 221 return NGX_ERROR; | |
| 222 } | |
| 223 | |
| 224 if (ngx_array_init(&ctx->ranges, r->pool, 1, sizeof(ngx_http_range_t)) | |
| 463 | 225 != NGX_OK) |
| 50 | 226 { |
| 227 return NGX_ERROR; | |
| 228 } | |
| 229 | |
| 392 | 230 rc = ngx_http_range_parse(r, ctx); |
| 231 | |
| 232 if (rc == NGX_OK) { | |
| 233 | |
| 234 ngx_http_set_ctx(r, ctx, ngx_http_range_body_filter_module); | |
| 235 | |
| 236 r->headers_out.status = NGX_HTTP_PARTIAL_CONTENT; | |
| 473 | 237 r->headers_out.status_line.len = 0; |
| 392 | 238 |
| 239 if (ctx->ranges.nelts == 1) { | |
| 240 return ngx_http_range_singlepart_header(r, ctx); | |
| 241 } | |
| 242 | |
| 243 return ngx_http_range_multipart_header(r, ctx); | |
| 244 } | |
| 245 | |
| 246 if (rc == NGX_HTTP_RANGE_NOT_SATISFIABLE) { | |
| 247 return ngx_http_range_not_satisfiable(r); | |
| 248 } | |
| 249 | |
| 250 /* rc == NGX_ERROR */ | |
| 251 | |
| 252 return rc; | |
| 253 | |
| 254 next_filter: | |
| 255 | |
| 256 r->headers_out.accept_ranges = ngx_list_push(&r->headers_out.headers); | |
| 257 if (r->headers_out.accept_ranges == NULL) { | |
| 258 return NGX_ERROR; | |
| 259 } | |
| 260 | |
| 261 r->headers_out.accept_ranges->hash = 1; | |
| 583 | 262 ngx_str_set(&r->headers_out.accept_ranges->key, "Accept-Ranges"); |
| 263 ngx_str_set(&r->headers_out.accept_ranges->value, "bytes"); | |
| 392 | 264 |
| 265 return ngx_http_next_header_filter(r); | |
| 266 } | |
| 267 | |
| 268 | |
| 269 ngx_int_t | |
| 270 ngx_http_range_parse(ngx_http_request_t *r, ngx_http_range_filter_ctx_t *ctx) | |
| 271 { | |
| 272 u_char *p; | |
| 273 off_t start, end; | |
| 274 ngx_uint_t suffix; | |
| 275 ngx_http_range_t *range; | |
| 276 | |
| 50 | 277 p = r->headers_in.range->value.data + 6; |
| 278 | |
| 279 for ( ;; ) { | |
| 280 start = 0; | |
| 281 end = 0; | |
| 282 suffix = 0; | |
| 283 | |
| 284 while (*p == ' ') { p++; } | |
| 285 | |
| 286 if (*p != '-') { | |
| 287 if (*p < '0' || *p > '9') { | |
| 392 | 288 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 289 } |
| 290 | |
| 291 while (*p >= '0' && *p <= '9') { | |
| 292 start = start * 10 + *p++ - '0'; | |
| 293 } | |
| 294 | |
| 295 while (*p == ' ') { p++; } | |
| 296 | |
| 297 if (*p++ != '-') { | |
| 392 | 298 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 299 } |
| 300 | |
| 301 if (start >= r->headers_out.content_length_n) { | |
| 392 | 302 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 303 } |
| 304 | |
| 305 while (*p == ' ') { p++; } | |
| 306 | |
| 307 if (*p == ',' || *p == '\0') { | |
| 272 | 308 range = ngx_array_push(&ctx->ranges); |
| 50 | 309 if (range == NULL) { |
| 310 return NGX_ERROR; | |
| 311 } | |
| 312 | |
| 313 range->start = start; | |
| 314 range->end = r->headers_out.content_length_n; | |
| 315 | |
| 316 if (*p++ != ',') { | |
| 392 | 317 return NGX_OK; |
| 50 | 318 } |
| 319 | |
| 320 continue; | |
| 321 } | |
| 322 | |
| 323 } else { | |
| 324 suffix = 1; | |
| 325 p++; | |
| 326 } | |
| 327 | |
| 328 if (*p < '0' || *p > '9') { | |
| 392 | 329 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 330 } |
| 331 | |
| 332 while (*p >= '0' && *p <= '9') { | |
| 333 end = end * 10 + *p++ - '0'; | |
| 334 } | |
| 335 | |
| 336 while (*p == ' ') { p++; } | |
| 337 | |
| 338 if (*p != ',' && *p != '\0') { | |
| 392 | 339 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 340 } |
| 341 | |
| 342 if (suffix) { | |
| 343 start = r->headers_out.content_length_n - end; | |
| 344 end = r->headers_out.content_length_n - 1; | |
| 345 } | |
| 346 | |
| 347 if (start > end) { | |
| 392 | 348 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 349 } |
| 350 | |
| 272 | 351 range = ngx_array_push(&ctx->ranges); |
| 50 | 352 if (range == NULL) { |
| 353 return NGX_ERROR; | |
| 354 } | |
| 355 | |
| 356 range->start = start; | |
| 357 | |
| 358 if (end >= r->headers_out.content_length_n) { | |
| 359 /* | |
| 360 * Download Accelerator sends the last byte position | |
| 361 * that equals to the file length | |
| 362 */ | |
| 363 range->end = r->headers_out.content_length_n; | |
| 364 | |
| 365 } else { | |
| 366 range->end = end + 1; | |
| 367 } | |
| 368 | |
| 369 if (*p++ != ',') { | |
| 392 | 370 return NGX_OK; |
| 50 | 371 } |
| 372 } | |
| 392 | 373 } |
| 374 | |
| 375 | |
| 376 static ngx_int_t | |
| 377 ngx_http_range_singlepart_header(ngx_http_request_t *r, | |
| 378 ngx_http_range_filter_ctx_t *ctx) | |
| 379 { | |
| 380 ngx_table_elt_t *content_range; | |
| 381 ngx_http_range_t *range; | |
| 382 | |
| 383 content_range = ngx_list_push(&r->headers_out.headers); | |
| 384 if (content_range == NULL) { | |
| 385 return NGX_ERROR; | |
| 386 } | |
| 50 | 387 |
| 392 | 388 r->headers_out.content_range = content_range; |
| 50 | 389 |
| 392 | 390 content_range->hash = 1; |
| 583 | 391 ngx_str_set(&content_range->key, "Content-Range"); |
| 50 | 392 |
| 392 | 393 content_range->value.data = ngx_pnalloc(r->pool, |
| 394 sizeof("bytes -/") - 1 + 3 * NGX_OFF_T_LEN); | |
| 395 if (content_range->value.data == NULL) { | |
| 396 return NGX_ERROR; | |
| 50 | 397 } |
| 398 | |
| 392 | 399 /* "Content-Range: bytes SSSS-EEEE/TTTT" header */ |
| 50 | 400 |
| 392 | 401 range = ctx->ranges.elts; |
| 50 | 402 |
| 392 | 403 content_range->value.len = ngx_sprintf(content_range->value.data, |
| 404 "bytes %O-%O/%O", | |
| 405 range->start, range->end - 1, | |
| 406 r->headers_out.content_length_n) | |
| 407 - content_range->value.data; | |
| 50 | 408 |
| 392 | 409 r->headers_out.content_length_n = range->end - range->start; |
| 50 | 410 |
| 392 | 411 if (r->headers_out.content_length) { |
| 412 r->headers_out.content_length->hash = 0; | |
| 413 r->headers_out.content_length = NULL; | |
| 50 | 414 } |
| 415 | |
| 392 | 416 return ngx_http_next_header_filter(r); |
| 417 } | |
| 50 | 418 |
| 392 | 419 |
| 420 static ngx_int_t | |
| 421 ngx_http_range_multipart_header(ngx_http_request_t *r, | |
| 422 ngx_http_range_filter_ctx_t *ctx) | |
| 423 { | |
| 424 size_t len; | |
| 425 ngx_uint_t i; | |
| 426 ngx_http_range_t *range; | |
| 427 ngx_atomic_uint_t boundary; | |
| 50 | 428 |
| 429 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN | |
| 430 + sizeof(CRLF "Content-Type: ") - 1 | |
| 58 | 431 + r->headers_out.content_type.len |
| 50 | 432 + sizeof(CRLF "Content-Range: bytes ") - 1; |
| 433 | |
| 434 if (r->headers_out.charset.len) { | |
| 435 len += sizeof("; charset=") - 1 + r->headers_out.charset.len; | |
| 436 } | |
| 437 | |
| 382 | 438 ctx->boundary_header.data = ngx_pnalloc(r->pool, len); |
| 50 | 439 if (ctx->boundary_header.data == NULL) { |
| 440 return NGX_ERROR; | |
| 441 } | |
| 442 | |
| 443 boundary = ngx_next_temp_number(0); | |
| 444 | |
| 445 /* | |
| 446 * The boundary header of the range: | |
| 447 * CRLF | |
| 448 * "--0123456789" CRLF | |
| 449 * "Content-Type: image/jpeg" CRLF | |
| 450 * "Content-Range: bytes " | |
| 451 */ | |
| 452 | |
| 453 if (r->headers_out.charset.len) { | |
| 454 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
| 455 CRLF "--%0muA" CRLF | |
| 456 "Content-Type: %V; charset=%V" CRLF | |
| 457 "Content-Range: bytes ", | |
| 458 boundary, | |
| 58 | 459 &r->headers_out.content_type, |
| 50 | 460 &r->headers_out.charset) |
| 461 - ctx->boundary_header.data; | |
| 462 | |
| 463 r->headers_out.charset.len = 0; | |
| 464 | |
| 392 | 465 } else if (r->headers_out.content_type.len) { |
| 50 | 466 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, |
| 467 CRLF "--%0muA" CRLF | |
| 468 "Content-Type: %V" CRLF | |
| 469 "Content-Range: bytes ", | |
| 470 boundary, | |
| 58 | 471 &r->headers_out.content_type) |
| 50 | 472 - ctx->boundary_header.data; |
| 392 | 473 |
| 474 } else { | |
| 475 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
| 476 CRLF "--%0muA" CRLF | |
| 477 "Content-Range: bytes ", | |
| 478 boundary) | |
| 479 - ctx->boundary_header.data; | |
| 50 | 480 } |
| 481 | |
| 58 | 482 r->headers_out.content_type.data = |
| 382 | 483 ngx_pnalloc(r->pool, |
| 484 sizeof("Content-Type: multipart/byteranges; boundary=") - 1 | |
| 485 + NGX_ATOMIC_T_LEN); | |
| 50 | 486 |
| 58 | 487 if (r->headers_out.content_type.data == NULL) { |
| 50 | 488 return NGX_ERROR; |
| 489 } | |
| 490 | |
| 503 | 491 r->headers_out.content_type_lowcase = NULL; |
| 492 | |
| 50 | 493 /* "Content-Type: multipart/byteranges; boundary=0123456789" */ |
| 494 | |
| 58 | 495 r->headers_out.content_type.len = |
| 496 ngx_sprintf(r->headers_out.content_type.data, | |
| 50 | 497 "multipart/byteranges; boundary=%0muA", |
| 498 boundary) | |
| 58 | 499 - r->headers_out.content_type.data; |
| 50 | 500 |
| 503 | 501 r->headers_out.content_type_len = r->headers_out.content_type.len; |
| 50 | 502 |
| 503 /* the size of the last boundary CRLF "--0123456789--" CRLF */ | |
| 504 | |
| 505 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN + sizeof("--" CRLF) - 1; | |
| 506 | |
| 272 | 507 range = ctx->ranges.elts; |
| 508 for (i = 0; i < ctx->ranges.nelts; i++) { | |
| 50 | 509 |
| 510 /* the size of the range: "SSSS-EEEE/TTTT" CRLF CRLF */ | |
| 511 | |
| 512 range[i].content_range.data = | |
| 382 | 513 ngx_pnalloc(r->pool, 3 * NGX_OFF_T_LEN + 2 + 4); |
| 50 | 514 |
| 515 if (range[i].content_range.data == NULL) { | |
| 516 return NGX_ERROR; | |
| 517 } | |
| 518 | |
| 519 range[i].content_range.len = ngx_sprintf(range[i].content_range.data, | |
| 520 "%O-%O/%O" CRLF CRLF, | |
| 521 range[i].start, range[i].end - 1, | |
| 522 r->headers_out.content_length_n) | |
| 523 - range[i].content_range.data; | |
| 524 | |
| 525 len += ctx->boundary_header.len + range[i].content_range.len | |
| 526 + (size_t) (range[i].end - range[i].start); | |
| 527 } | |
| 528 | |
| 529 r->headers_out.content_length_n = len; | |
| 272 | 530 |
| 531 if (r->headers_out.content_length) { | |
| 532 r->headers_out.content_length->hash = 0; | |
| 533 r->headers_out.content_length = NULL; | |
| 534 } | |
| 50 | 535 |
| 536 return ngx_http_next_header_filter(r); | |
| 392 | 537 } |
| 346 | 538 |
| 539 | |
| 392 | 540 static ngx_int_t |
| 541 ngx_http_range_not_satisfiable(ngx_http_request_t *r) | |
| 542 { | |
| 543 ngx_table_elt_t *content_range; | |
| 544 | |
| 545 r->headers_out.status = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 546 | |
| 547 content_range = ngx_list_push(&r->headers_out.headers); | |
| 548 if (content_range == NULL) { | |
| 346 | 549 return NGX_ERROR; |
| 550 } | |
| 551 | |
| 392 | 552 r->headers_out.content_range = content_range; |
| 553 | |
| 554 content_range->hash = 1; | |
| 583 | 555 ngx_str_set(&content_range->key, "Content-Range"); |
| 346 | 556 |
| 392 | 557 content_range->value.data = ngx_pnalloc(r->pool, |
| 558 sizeof("bytes */") - 1 + NGX_OFF_T_LEN); | |
| 559 if (content_range->value.data == NULL) { | |
| 560 return NGX_ERROR; | |
| 561 } | |
| 562 | |
| 563 content_range->value.len = ngx_sprintf(content_range->value.data, | |
| 564 "bytes */%O", | |
| 565 r->headers_out.content_length_n) | |
| 566 - content_range->value.data; | |
| 567 | |
| 568 ngx_http_clear_content_length(r); | |
| 569 | |
| 570 return NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 50 | 571 } |
| 572 | |
| 573 | |
| 574 static ngx_int_t | |
|
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575 ngx_http_range_body_generic_filter(ngx_http_request_t *r, ngx_chain_t *in, |
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576 ngx_http_output_body_filter_pt ngx_http_next_body_filter) |
| 50 | 577 { |
| 578 ngx_http_range_filter_ctx_t *ctx; | |
| 579 | |
| 272 | 580 if (in == NULL) { |
| 581 return ngx_http_next_body_filter(r, in); | |
| 582 } | |
| 583 | |
| 584 ctx = ngx_http_get_module_ctx(r, ngx_http_range_body_filter_module); | |
| 585 | |
| 586 if (ctx == NULL) { | |
| 587 return ngx_http_next_body_filter(r, in); | |
| 588 } | |
| 589 | |
| 392 | 590 if (ctx->ranges.nelts == 1) { |
| 396 | 591 return ngx_http_range_singlepart_body(r, ctx, in, |
| 592 ngx_http_next_body_filter); | |
| 392 | 593 } |
| 594 | |
| 595 /* | |
| 596 * multipart ranges are supported only if whole body is in a single buffer | |
| 597 */ | |
| 272 | 598 |
| 599 if (ngx_buf_special(in->buf)) { | |
| 50 | 600 return ngx_http_next_body_filter(r, in); |
| 601 } | |
| 602 | |
| 392 | 603 if (ngx_http_range_test_overlapped(r, ctx, in) != NGX_OK) { |
| 604 return NGX_ERROR; | |
| 605 } | |
| 606 | |
| 396 | 607 return ngx_http_range_multipart_body(r, ctx, in, |
| 608 ngx_http_next_body_filter); | |
| 392 | 609 } |
| 610 | |
| 611 | |
| 612 static ngx_int_t | |
| 613 ngx_http_range_test_overlapped(ngx_http_request_t *r, | |
| 614 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in) | |
| 615 { | |
| 616 off_t start, last; | |
| 617 ngx_buf_t *buf; | |
| 618 ngx_uint_t i; | |
| 619 ngx_http_range_t *range; | |
| 620 | |
| 272 | 621 if (ctx->offset) { |
| 622 goto overlapped; | |
| 623 } | |
| 624 | |
| 392 | 625 buf = in->buf; |
| 272 | 626 |
| 627 if (!buf->last_buf) { | |
| 628 | |
| 629 if (buf->in_file) { | |
| 630 start = buf->file_pos + ctx->offset; | |
| 631 last = buf->file_last + ctx->offset; | |
| 632 | |
| 633 } else { | |
| 634 start = buf->pos - buf->start + ctx->offset; | |
| 635 last = buf->last - buf->start + ctx->offset; | |
| 636 } | |
| 637 | |
| 392 | 638 range = ctx->ranges.elts; |
| 272 | 639 for (i = 0; i < ctx->ranges.nelts; i++) { |
| 640 if (start > range[i].start || last < range[i].end) { | |
| 641 goto overlapped; | |
| 642 } | |
| 643 } | |
| 644 } | |
| 645 | |
| 646 ctx->offset = ngx_buf_size(buf); | |
| 647 | |
| 392 | 648 return NGX_OK; |
| 649 | |
| 650 overlapped: | |
| 651 | |
| 652 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 653 "range in overlapped buffers"); | |
| 654 | |
| 655 return NGX_ERROR; | |
| 656 } | |
| 657 | |
| 658 | |
| 659 static ngx_int_t | |
| 660 ngx_http_range_singlepart_body(ngx_http_request_t *r, | |
| 396 | 661 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in, |
| 662 ngx_http_output_body_filter_pt ngx_http_next_body_filter) | |
| 392 | 663 { |
| 664 off_t start, last; | |
| 665 ngx_buf_t *buf; | |
| 666 ngx_chain_t *out, *cl, **ll; | |
| 667 ngx_http_range_t *range; | |
| 668 | |
| 669 out = NULL; | |
| 670 ll = &out; | |
| 671 range = ctx->ranges.elts; | |
| 50 | 672 |
| 392 | 673 for (cl = in; cl; cl = cl->next) { |
| 674 | |
| 675 buf = cl->buf; | |
| 676 | |
| 677 start = ctx->offset; | |
| 678 last = ctx->offset + ngx_buf_size(buf); | |
| 679 | |
| 680 ctx->offset = last; | |
| 681 | |
| 682 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 683 "http range body buf: %O-%O", start, last); | |
| 684 | |
| 685 if (ngx_buf_special(buf)) { | |
| 686 *ll = cl; | |
| 687 ll = &cl->next; | |
| 688 continue; | |
| 689 } | |
| 690 | |
| 691 if (range->end <= start || range->start >= last) { | |
| 692 | |
| 693 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 694 "http range body skip"); | |
| 695 | |
| 420 | 696 if (buf->in_file) { |
| 697 buf->file_pos = buf->file_last; | |
| 698 } | |
| 699 | |
| 392 | 700 buf->pos = buf->last; |
| 420 | 701 buf->sync = 1; |
| 702 | |
| 392 | 703 continue; |
| 272 | 704 } |
| 50 | 705 |
| 392 | 706 if (range->start > start) { |
| 707 | |
| 708 if (buf->in_file) { | |
| 709 buf->file_pos += range->start - start; | |
| 710 } | |
| 711 | |
| 712 if (ngx_buf_in_memory(buf)) { | |
| 713 buf->pos += (size_t) (range->start - start); | |
| 714 } | |
| 50 | 715 } |
| 716 | |
| 392 | 717 if (range->end <= last) { |
| 718 | |
| 719 if (buf->in_file) { | |
| 720 buf->file_last -= last - range->end; | |
| 721 } | |
| 722 | |
| 723 if (ngx_buf_in_memory(buf)) { | |
| 724 buf->last -= (size_t) (last - range->end); | |
| 725 } | |
| 726 | |
| 727 buf->last_buf = 1; | |
| 728 *ll = cl; | |
| 729 cl->next = NULL; | |
| 730 | |
| 731 break; | |
| 732 } | |
| 733 | |
| 734 *ll = cl; | |
| 735 ll = &cl->next; | |
| 272 | 736 } |
| 50 | 737 |
| 392 | 738 if (out == NULL) { |
| 739 return NGX_OK; | |
| 740 } | |
| 741 | |
| 742 return ngx_http_next_body_filter(r, out); | |
| 743 } | |
| 744 | |
| 745 | |
| 746 static ngx_int_t | |
| 747 ngx_http_range_multipart_body(ngx_http_request_t *r, | |
| 396 | 748 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in, |
| 749 ngx_http_output_body_filter_pt ngx_http_next_body_filter) | |
| 392 | 750 { |
| 473 | 751 off_t body_start; |
| 392 | 752 ngx_buf_t *b, *buf; |
| 753 ngx_uint_t i; | |
| 754 ngx_chain_t *out, *hcl, *rcl, *dcl, **ll; | |
| 755 ngx_http_range_t *range; | |
| 756 | |
| 272 | 757 ll = &out; |
| 392 | 758 buf = in->buf; |
| 759 range = ctx->ranges.elts; | |
| 272 | 760 |
| 473 | 761 #if (NGX_HTTP_CACHE) |
| 762 body_start = r->cached ? r->cache->body_start : 0; | |
| 763 #else | |
| 764 body_start = 0; | |
| 765 #endif | |
| 766 | |
| 272 | 767 for (i = 0; i < ctx->ranges.nelts; i++) { |
| 50 | 768 |
| 272 | 769 /* |
| 770 * The boundary header of the range: | |
| 771 * CRLF | |
| 772 * "--0123456789" CRLF | |
| 773 * "Content-Type: image/jpeg" CRLF | |
| 774 * "Content-Range: bytes " | |
| 775 */ | |
| 50 | 776 |
| 272 | 777 b = ngx_calloc_buf(r->pool); |
| 778 if (b == NULL) { | |
| 779 return NGX_ERROR; | |
| 780 } | |
| 50 | 781 |
| 272 | 782 b->memory = 1; |
| 783 b->pos = ctx->boundary_header.data; | |
| 784 b->last = ctx->boundary_header.data + ctx->boundary_header.len; | |
| 50 | 785 |
| 272 | 786 hcl = ngx_alloc_chain_link(r->pool); |
| 787 if (hcl == NULL) { | |
| 788 return NGX_ERROR; | |
| 789 } | |
| 50 | 790 |
| 272 | 791 hcl->buf = b; |
| 50 | 792 |
| 793 | |
| 272 | 794 /* "SSSS-EEEE/TTTT" CRLF CRLF */ |
| 50 | 795 |
| 796 b = ngx_calloc_buf(r->pool); | |
| 797 if (b == NULL) { | |
| 798 return NGX_ERROR; | |
| 799 } | |
| 800 | |
| 801 b->temporary = 1; | |
| 272 | 802 b->pos = range[i].content_range.data; |
| 803 b->last = range[i].content_range.data + range[i].content_range.len; | |
| 804 | |
| 805 rcl = ngx_alloc_chain_link(r->pool); | |
| 806 if (rcl == NULL) { | |
| 807 return NGX_ERROR; | |
| 808 } | |
| 809 | |
| 810 rcl->buf = b; | |
| 811 | |
| 812 | |
| 813 /* the range data */ | |
| 814 | |
| 815 b = ngx_calloc_buf(r->pool); | |
| 816 if (b == NULL) { | |
| 817 return NGX_ERROR; | |
| 818 } | |
| 50 | 819 |
| 272 | 820 b->in_file = buf->in_file; |
| 821 b->temporary = buf->temporary; | |
| 822 b->memory = buf->memory; | |
| 823 b->mmap = buf->mmap; | |
| 824 b->file = buf->file; | |
| 825 | |
| 826 if (buf->in_file) { | |
| 473 | 827 b->file_pos = body_start + range[i].start; |
| 828 b->file_last = body_start + range[i].end; | |
| 272 | 829 } |
| 830 | |
| 831 if (ngx_buf_in_memory(buf)) { | |
| 282 | 832 b->pos = buf->start + (size_t) range[i].start; |
| 833 b->last = buf->start + (size_t) range[i].end; | |
| 272 | 834 } |
| 835 | |
| 836 dcl = ngx_alloc_chain_link(r->pool); | |
| 837 if (dcl == NULL) { | |
| 50 | 838 return NGX_ERROR; |
| 839 } | |
| 840 | |
| 272 | 841 dcl->buf = b; |
| 50 | 842 |
| 843 *ll = hcl; | |
| 272 | 844 hcl->next = rcl; |
| 845 rcl->next = dcl; | |
| 846 ll = &dcl->next; | |
| 847 } | |
| 50 | 848 |
| 272 | 849 /* the last boundary CRLF "--0123456789--" CRLF */ |
| 850 | |
| 851 b = ngx_calloc_buf(r->pool); | |
| 852 if (b == NULL) { | |
| 853 return NGX_ERROR; | |
| 854 } | |
| 855 | |
| 856 b->temporary = 1; | |
| 857 b->last_buf = 1; | |
| 858 | |
| 382 | 859 b->pos = ngx_pnalloc(r->pool, sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN |
| 860 + sizeof("--" CRLF) - 1); | |
| 272 | 861 if (b->pos == NULL) { |
| 862 return NGX_ERROR; | |
| 50 | 863 } |
| 864 | |
| 300 | 865 b->last = ngx_cpymem(b->pos, ctx->boundary_header.data, |
| 866 sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN); | |
| 272 | 867 *b->last++ = '-'; *b->last++ = '-'; |
| 868 *b->last++ = CR; *b->last++ = LF; | |
| 869 | |
| 870 hcl = ngx_alloc_chain_link(r->pool); | |
| 871 if (hcl == NULL) { | |
| 872 return NGX_ERROR; | |
| 873 } | |
| 50 | 874 |
| 272 | 875 hcl->buf = b; |
| 876 hcl->next = NULL; | |
| 877 | |
| 878 *ll = hcl; | |
| 879 | |
| 880 return ngx_http_next_body_filter(r, out); | |
| 50 | 881 } |
| 882 | |
| 883 | |
| 884 static ngx_int_t | |
|
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diff
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885 ngx_http_range_body_early_filter(ngx_http_request_t *r, ngx_chain_t *in) |
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|
886 { |
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changeset
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887 if (!r->allow_ranges || r->late_ranges) { |
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changeset
|
888 return ngx_http_next_body_early_filter(r, in); |
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changeset
|
889 } |
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parents:
390
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changeset
|
890 |
|
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Range filter: late_ranges functionality.
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parents:
390
diff
changeset
|
891 return ngx_http_range_body_generic_filter(r, in, |
|
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Range filter: late_ranges functionality.
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parents:
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changeset
|
892 ngx_http_next_body_early_filter); |
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parents:
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diff
changeset
|
893 } |
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Range filter: late_ranges functionality.
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parents:
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diff
changeset
|
894 |
|
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Range filter: late_ranges functionality.
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parents:
390
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changeset
|
895 |
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Range filter: late_ranges functionality.
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parents:
390
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changeset
|
896 static ngx_int_t |
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parents:
390
diff
changeset
|
897 ngx_http_range_body_late_filter(ngx_http_request_t *r, ngx_chain_t *in) |
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parents:
390
diff
changeset
|
898 { |
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parents:
390
diff
changeset
|
899 if (!r->allow_ranges || !r->late_ranges) { |
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parents:
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900 return ngx_http_next_body_late_filter(r, in); |
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1d9bef53cd8e
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parents:
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diff
changeset
|
901 } |
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1d9bef53cd8e
Range filter: late_ranges functionality.
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parents:
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changeset
|
902 |
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Range filter: late_ranges functionality.
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parents:
390
diff
changeset
|
903 return ngx_http_range_body_generic_filter(r, in, |
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parents:
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|
904 ngx_http_next_body_late_filter); |
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|
905 } |
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1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
906 |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
907 |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
908 static ngx_int_t |
| 230 | 909 ngx_http_range_header_filter_init(ngx_conf_t *cf) |
| 50 | 910 { |
| 911 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 912 ngx_http_top_header_filter = ngx_http_range_header_filter; | |
| 913 | |
| 914 return NGX_OK; | |
| 915 } | |
| 916 | |
| 917 | |
| 918 static ngx_int_t | |
| 230 | 919 ngx_http_range_body_filter_init(ngx_conf_t *cf) |
| 50 | 920 { |
|
391
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
921 ngx_http_next_body_early_filter = ngx_http_top_body_filter; |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
922 ngx_http_top_body_filter = ngx_http_range_body_early_filter; |
| 50 | 923 |
| 924 return NGX_OK; | |
| 925 } | |
|
391
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
926 |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
927 |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
928 static ngx_int_t |
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1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
929 ngx_http_range_late_filter_init(ngx_conf_t *cf) |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
930 { |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
931 ngx_http_next_body_late_filter = ngx_http_top_body_filter; |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
932 ngx_http_top_body_filter = ngx_http_range_body_late_filter; |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
933 |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
934 return NGX_OK; |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
935 } |