Mercurial > hg > nginx-ranges
annotate src/http/modules/ngx_http_range_filter_module.c @ 517:8fbdd980b527
Merge with current.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 13 Jul 2009 23:56:24 +0400 |
| parents | 44a61c599bb2 499474178a11 |
| children | e67b227c8dbb |
| 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; | |
| 262 r->headers_out.accept_ranges->key.len = sizeof("Accept-Ranges") - 1; | |
| 263 r->headers_out.accept_ranges->key.data = (u_char *) "Accept-Ranges"; | |
| 264 r->headers_out.accept_ranges->value.len = sizeof("bytes") - 1; | |
| 265 r->headers_out.accept_ranges->value.data = (u_char *) "bytes"; | |
| 266 | |
| 267 return ngx_http_next_header_filter(r); | |
| 268 } | |
| 269 | |
| 270 | |
| 271 ngx_int_t | |
| 272 ngx_http_range_parse(ngx_http_request_t *r, ngx_http_range_filter_ctx_t *ctx) | |
| 273 { | |
| 274 u_char *p; | |
| 275 off_t start, end; | |
| 276 ngx_uint_t suffix; | |
| 277 ngx_http_range_t *range; | |
| 278 | |
| 50 | 279 p = r->headers_in.range->value.data + 6; |
| 280 | |
| 281 for ( ;; ) { | |
| 282 start = 0; | |
| 283 end = 0; | |
| 284 suffix = 0; | |
| 285 | |
| 286 while (*p == ' ') { p++; } | |
| 287 | |
| 288 if (*p != '-') { | |
| 289 if (*p < '0' || *p > '9') { | |
| 392 | 290 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 291 } |
| 292 | |
| 293 while (*p >= '0' && *p <= '9') { | |
| 294 start = start * 10 + *p++ - '0'; | |
| 295 } | |
| 296 | |
| 297 while (*p == ' ') { p++; } | |
| 298 | |
| 299 if (*p++ != '-') { | |
| 392 | 300 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 301 } |
| 302 | |
| 303 if (start >= r->headers_out.content_length_n) { | |
| 392 | 304 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 305 } |
| 306 | |
| 307 while (*p == ' ') { p++; } | |
| 308 | |
| 309 if (*p == ',' || *p == '\0') { | |
| 272 | 310 range = ngx_array_push(&ctx->ranges); |
| 50 | 311 if (range == NULL) { |
| 312 return NGX_ERROR; | |
| 313 } | |
| 314 | |
| 315 range->start = start; | |
| 316 range->end = r->headers_out.content_length_n; | |
| 317 | |
| 318 if (*p++ != ',') { | |
| 392 | 319 return NGX_OK; |
| 50 | 320 } |
| 321 | |
| 322 continue; | |
| 323 } | |
| 324 | |
| 325 } else { | |
| 326 suffix = 1; | |
| 327 p++; | |
| 328 } | |
| 329 | |
| 330 if (*p < '0' || *p > '9') { | |
| 392 | 331 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 332 } |
| 333 | |
| 334 while (*p >= '0' && *p <= '9') { | |
| 335 end = end * 10 + *p++ - '0'; | |
| 336 } | |
| 337 | |
| 338 while (*p == ' ') { p++; } | |
| 339 | |
| 340 if (*p != ',' && *p != '\0') { | |
| 392 | 341 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 342 } |
| 343 | |
| 344 if (suffix) { | |
| 345 start = r->headers_out.content_length_n - end; | |
| 346 end = r->headers_out.content_length_n - 1; | |
| 347 } | |
| 348 | |
| 349 if (start > end) { | |
| 392 | 350 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 351 } |
| 352 | |
| 272 | 353 range = ngx_array_push(&ctx->ranges); |
| 50 | 354 if (range == NULL) { |
| 355 return NGX_ERROR; | |
| 356 } | |
| 357 | |
| 358 range->start = start; | |
| 359 | |
| 360 if (end >= r->headers_out.content_length_n) { | |
| 361 /* | |
| 362 * Download Accelerator sends the last byte position | |
| 363 * that equals to the file length | |
| 364 */ | |
| 365 range->end = r->headers_out.content_length_n; | |
| 366 | |
| 367 } else { | |
| 368 range->end = end + 1; | |
| 369 } | |
| 370 | |
| 371 if (*p++ != ',') { | |
| 392 | 372 return NGX_OK; |
| 50 | 373 } |
| 374 } | |
| 392 | 375 } |
| 376 | |
| 377 | |
| 378 static ngx_int_t | |
| 379 ngx_http_range_singlepart_header(ngx_http_request_t *r, | |
| 380 ngx_http_range_filter_ctx_t *ctx) | |
| 381 { | |
| 382 ngx_table_elt_t *content_range; | |
| 383 ngx_http_range_t *range; | |
| 384 | |
| 385 content_range = ngx_list_push(&r->headers_out.headers); | |
| 386 if (content_range == NULL) { | |
| 387 return NGX_ERROR; | |
| 388 } | |
| 50 | 389 |
| 392 | 390 r->headers_out.content_range = content_range; |
| 50 | 391 |
| 392 | 392 content_range->hash = 1; |
| 393 content_range->key.len = sizeof("Content-Range") - 1; | |
| 394 content_range->key.data = (u_char *) "Content-Range"; | |
| 50 | 395 |
| 392 | 396 content_range->value.data = ngx_pnalloc(r->pool, |
| 397 sizeof("bytes -/") - 1 + 3 * NGX_OFF_T_LEN); | |
| 398 if (content_range->value.data == NULL) { | |
| 399 return NGX_ERROR; | |
| 50 | 400 } |
| 401 | |
| 392 | 402 /* "Content-Range: bytes SSSS-EEEE/TTTT" header */ |
| 50 | 403 |
| 392 | 404 range = ctx->ranges.elts; |
| 50 | 405 |
| 392 | 406 content_range->value.len = ngx_sprintf(content_range->value.data, |
| 407 "bytes %O-%O/%O", | |
| 408 range->start, range->end - 1, | |
| 409 r->headers_out.content_length_n) | |
| 410 - content_range->value.data; | |
| 50 | 411 |
| 392 | 412 r->headers_out.content_length_n = range->end - range->start; |
| 50 | 413 |
| 392 | 414 if (r->headers_out.content_length) { |
| 415 r->headers_out.content_length->hash = 0; | |
| 416 r->headers_out.content_length = NULL; | |
| 50 | 417 } |
| 418 | |
| 392 | 419 return ngx_http_next_header_filter(r); |
| 420 } | |
| 50 | 421 |
| 392 | 422 |
| 423 static ngx_int_t | |
| 424 ngx_http_range_multipart_header(ngx_http_request_t *r, | |
| 425 ngx_http_range_filter_ctx_t *ctx) | |
| 426 { | |
| 427 size_t len; | |
| 428 ngx_uint_t i; | |
| 429 ngx_http_range_t *range; | |
| 430 ngx_atomic_uint_t boundary; | |
| 50 | 431 |
| 432 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN | |
| 433 + sizeof(CRLF "Content-Type: ") - 1 | |
| 58 | 434 + r->headers_out.content_type.len |
| 50 | 435 + sizeof(CRLF "Content-Range: bytes ") - 1; |
| 436 | |
| 437 if (r->headers_out.charset.len) { | |
| 438 len += sizeof("; charset=") - 1 + r->headers_out.charset.len; | |
| 439 } | |
| 440 | |
| 382 | 441 ctx->boundary_header.data = ngx_pnalloc(r->pool, len); |
| 50 | 442 if (ctx->boundary_header.data == NULL) { |
| 443 return NGX_ERROR; | |
| 444 } | |
| 445 | |
| 446 boundary = ngx_next_temp_number(0); | |
| 447 | |
| 448 /* | |
| 449 * The boundary header of the range: | |
| 450 * CRLF | |
| 451 * "--0123456789" CRLF | |
| 452 * "Content-Type: image/jpeg" CRLF | |
| 453 * "Content-Range: bytes " | |
| 454 */ | |
| 455 | |
| 456 if (r->headers_out.charset.len) { | |
| 457 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
| 458 CRLF "--%0muA" CRLF | |
| 459 "Content-Type: %V; charset=%V" CRLF | |
| 460 "Content-Range: bytes ", | |
| 461 boundary, | |
| 58 | 462 &r->headers_out.content_type, |
| 50 | 463 &r->headers_out.charset) |
| 464 - ctx->boundary_header.data; | |
| 465 | |
| 466 r->headers_out.charset.len = 0; | |
| 467 | |
| 392 | 468 } else if (r->headers_out.content_type.len) { |
| 50 | 469 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, |
| 470 CRLF "--%0muA" CRLF | |
| 471 "Content-Type: %V" CRLF | |
| 472 "Content-Range: bytes ", | |
| 473 boundary, | |
| 58 | 474 &r->headers_out.content_type) |
| 50 | 475 - ctx->boundary_header.data; |
| 392 | 476 |
| 477 } else { | |
| 478 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
| 479 CRLF "--%0muA" CRLF | |
| 480 "Content-Range: bytes ", | |
| 481 boundary) | |
| 482 - ctx->boundary_header.data; | |
| 50 | 483 } |
| 484 | |
| 58 | 485 r->headers_out.content_type.data = |
| 382 | 486 ngx_pnalloc(r->pool, |
| 487 sizeof("Content-Type: multipart/byteranges; boundary=") - 1 | |
| 488 + NGX_ATOMIC_T_LEN); | |
| 50 | 489 |
| 58 | 490 if (r->headers_out.content_type.data == NULL) { |
| 50 | 491 return NGX_ERROR; |
| 492 } | |
| 493 | |
| 503 | 494 r->headers_out.content_type_lowcase = NULL; |
| 495 | |
| 50 | 496 /* "Content-Type: multipart/byteranges; boundary=0123456789" */ |
| 497 | |
| 58 | 498 r->headers_out.content_type.len = |
| 499 ngx_sprintf(r->headers_out.content_type.data, | |
| 50 | 500 "multipart/byteranges; boundary=%0muA", |
| 501 boundary) | |
| 58 | 502 - r->headers_out.content_type.data; |
| 50 | 503 |
| 503 | 504 r->headers_out.content_type_len = r->headers_out.content_type.len; |
| 50 | 505 |
| 506 /* the size of the last boundary CRLF "--0123456789--" CRLF */ | |
| 507 | |
| 508 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN + sizeof("--" CRLF) - 1; | |
| 509 | |
| 272 | 510 range = ctx->ranges.elts; |
| 511 for (i = 0; i < ctx->ranges.nelts; i++) { | |
| 50 | 512 |
| 513 /* the size of the range: "SSSS-EEEE/TTTT" CRLF CRLF */ | |
| 514 | |
| 515 range[i].content_range.data = | |
| 382 | 516 ngx_pnalloc(r->pool, 3 * NGX_OFF_T_LEN + 2 + 4); |
| 50 | 517 |
| 518 if (range[i].content_range.data == NULL) { | |
| 519 return NGX_ERROR; | |
| 520 } | |
| 521 | |
| 522 range[i].content_range.len = ngx_sprintf(range[i].content_range.data, | |
| 523 "%O-%O/%O" CRLF CRLF, | |
| 524 range[i].start, range[i].end - 1, | |
| 525 r->headers_out.content_length_n) | |
| 526 - range[i].content_range.data; | |
| 527 | |
| 528 len += ctx->boundary_header.len + range[i].content_range.len | |
| 529 + (size_t) (range[i].end - range[i].start); | |
| 530 } | |
| 531 | |
| 532 r->headers_out.content_length_n = len; | |
| 272 | 533 |
| 534 if (r->headers_out.content_length) { | |
| 535 r->headers_out.content_length->hash = 0; | |
| 536 r->headers_out.content_length = NULL; | |
| 537 } | |
| 50 | 538 |
| 539 return ngx_http_next_header_filter(r); | |
| 392 | 540 } |
| 346 | 541 |
| 542 | |
| 392 | 543 static ngx_int_t |
| 544 ngx_http_range_not_satisfiable(ngx_http_request_t *r) | |
| 545 { | |
| 546 ngx_table_elt_t *content_range; | |
| 547 | |
| 548 r->headers_out.status = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 549 | |
| 550 content_range = ngx_list_push(&r->headers_out.headers); | |
| 551 if (content_range == NULL) { | |
| 346 | 552 return NGX_ERROR; |
| 553 } | |
| 554 | |
| 392 | 555 r->headers_out.content_range = content_range; |
| 556 | |
| 557 content_range->hash = 1; | |
| 558 content_range->key.len = sizeof("Content-Range") - 1; | |
| 559 content_range->key.data = (u_char *) "Content-Range"; | |
| 346 | 560 |
| 392 | 561 content_range->value.data = ngx_pnalloc(r->pool, |
| 562 sizeof("bytes */") - 1 + NGX_OFF_T_LEN); | |
| 563 if (content_range->value.data == NULL) { | |
| 564 return NGX_ERROR; | |
| 565 } | |
| 566 | |
| 567 content_range->value.len = ngx_sprintf(content_range->value.data, | |
| 568 "bytes */%O", | |
| 569 r->headers_out.content_length_n) | |
| 570 - content_range->value.data; | |
| 571 | |
| 572 ngx_http_clear_content_length(r); | |
| 573 | |
| 574 return NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 50 | 575 } |
| 576 | |
| 577 | |
| 578 static ngx_int_t | |
|
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579 ngx_http_range_body_generic_filter(ngx_http_request_t *r, ngx_chain_t *in, |
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580 ngx_http_output_body_filter_pt ngx_http_next_body_filter) |
| 50 | 581 { |
| 582 ngx_http_range_filter_ctx_t *ctx; | |
| 583 | |
| 272 | 584 if (in == NULL) { |
| 585 return ngx_http_next_body_filter(r, in); | |
| 586 } | |
| 587 | |
| 588 ctx = ngx_http_get_module_ctx(r, ngx_http_range_body_filter_module); | |
| 589 | |
| 590 if (ctx == NULL) { | |
| 591 return ngx_http_next_body_filter(r, in); | |
| 592 } | |
| 593 | |
| 392 | 594 if (ctx->ranges.nelts == 1) { |
| 396 | 595 return ngx_http_range_singlepart_body(r, ctx, in, |
| 596 ngx_http_next_body_filter); | |
| 392 | 597 } |
| 598 | |
| 599 /* | |
| 600 * multipart ranges are supported only if whole body is in a single buffer | |
| 601 */ | |
| 272 | 602 |
| 603 if (ngx_buf_special(in->buf)) { | |
| 50 | 604 return ngx_http_next_body_filter(r, in); |
| 605 } | |
| 606 | |
| 392 | 607 if (ngx_http_range_test_overlapped(r, ctx, in) != NGX_OK) { |
| 608 return NGX_ERROR; | |
| 609 } | |
| 610 | |
| 396 | 611 return ngx_http_range_multipart_body(r, ctx, in, |
| 612 ngx_http_next_body_filter); | |
| 392 | 613 } |
| 614 | |
| 615 | |
| 616 static ngx_int_t | |
| 617 ngx_http_range_test_overlapped(ngx_http_request_t *r, | |
| 618 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in) | |
| 619 { | |
| 620 off_t start, last; | |
| 621 ngx_buf_t *buf; | |
| 622 ngx_uint_t i; | |
| 623 ngx_http_range_t *range; | |
| 624 | |
| 272 | 625 if (ctx->offset) { |
| 626 goto overlapped; | |
| 627 } | |
| 628 | |
| 392 | 629 buf = in->buf; |
| 272 | 630 |
| 631 if (!buf->last_buf) { | |
| 632 | |
| 633 if (buf->in_file) { | |
| 634 start = buf->file_pos + ctx->offset; | |
| 635 last = buf->file_last + ctx->offset; | |
| 636 | |
| 637 } else { | |
| 638 start = buf->pos - buf->start + ctx->offset; | |
| 639 last = buf->last - buf->start + ctx->offset; | |
| 640 } | |
| 641 | |
| 392 | 642 range = ctx->ranges.elts; |
| 272 | 643 for (i = 0; i < ctx->ranges.nelts; i++) { |
| 644 if (start > range[i].start || last < range[i].end) { | |
| 645 goto overlapped; | |
| 646 } | |
| 647 } | |
| 648 } | |
| 649 | |
| 650 ctx->offset = ngx_buf_size(buf); | |
| 651 | |
| 392 | 652 return NGX_OK; |
| 653 | |
| 654 overlapped: | |
| 655 | |
| 656 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
| 657 "range in overlapped buffers"); | |
| 658 | |
| 659 return NGX_ERROR; | |
| 660 } | |
| 661 | |
| 662 | |
| 663 static ngx_int_t | |
| 664 ngx_http_range_singlepart_body(ngx_http_request_t *r, | |
| 396 | 665 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in, |
| 666 ngx_http_output_body_filter_pt ngx_http_next_body_filter) | |
| 392 | 667 { |
| 668 off_t start, last; | |
| 669 ngx_buf_t *buf; | |
| 670 ngx_chain_t *out, *cl, **ll; | |
| 671 ngx_http_range_t *range; | |
| 672 | |
| 673 out = NULL; | |
| 674 ll = &out; | |
| 675 range = ctx->ranges.elts; | |
| 50 | 676 |
| 392 | 677 for (cl = in; cl; cl = cl->next) { |
| 678 | |
| 679 buf = cl->buf; | |
| 680 | |
| 681 start = ctx->offset; | |
| 682 last = ctx->offset + ngx_buf_size(buf); | |
| 683 | |
| 684 ctx->offset = last; | |
| 685 | |
| 686 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 687 "http range body buf: %O-%O", start, last); | |
| 688 | |
| 689 if (ngx_buf_special(buf)) { | |
| 690 *ll = cl; | |
| 691 ll = &cl->next; | |
| 692 continue; | |
| 693 } | |
| 694 | |
| 695 if (range->end <= start || range->start >= last) { | |
| 696 | |
| 697 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 698 "http range body skip"); | |
| 699 | |
| 420 | 700 if (buf->in_file) { |
| 701 buf->file_pos = buf->file_last; | |
| 702 } | |
| 703 | |
| 392 | 704 buf->pos = buf->last; |
| 420 | 705 buf->sync = 1; |
| 706 | |
| 392 | 707 continue; |
| 272 | 708 } |
| 50 | 709 |
| 392 | 710 if (range->start > start) { |
| 711 | |
| 712 if (buf->in_file) { | |
| 713 buf->file_pos += range->start - start; | |
| 714 } | |
| 715 | |
| 716 if (ngx_buf_in_memory(buf)) { | |
| 717 buf->pos += (size_t) (range->start - start); | |
| 718 } | |
| 50 | 719 } |
| 720 | |
| 392 | 721 if (range->end <= last) { |
| 722 | |
| 723 if (buf->in_file) { | |
| 724 buf->file_last -= last - range->end; | |
| 725 } | |
| 726 | |
| 727 if (ngx_buf_in_memory(buf)) { | |
| 728 buf->last -= (size_t) (last - range->end); | |
| 729 } | |
| 730 | |
| 731 buf->last_buf = 1; | |
| 732 *ll = cl; | |
| 733 cl->next = NULL; | |
| 734 | |
| 735 break; | |
| 736 } | |
| 737 | |
| 738 *ll = cl; | |
| 739 ll = &cl->next; | |
| 272 | 740 } |
| 50 | 741 |
| 392 | 742 if (out == NULL) { |
| 743 return NGX_OK; | |
| 744 } | |
| 745 | |
| 746 return ngx_http_next_body_filter(r, out); | |
| 747 } | |
| 748 | |
| 749 | |
| 750 static ngx_int_t | |
| 751 ngx_http_range_multipart_body(ngx_http_request_t *r, | |
| 396 | 752 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in, |
| 753 ngx_http_output_body_filter_pt ngx_http_next_body_filter) | |
| 392 | 754 { |
| 473 | 755 off_t body_start; |
| 392 | 756 ngx_buf_t *b, *buf; |
| 757 ngx_uint_t i; | |
| 758 ngx_chain_t *out, *hcl, *rcl, *dcl, **ll; | |
| 759 ngx_http_range_t *range; | |
| 760 | |
| 272 | 761 ll = &out; |
| 392 | 762 buf = in->buf; |
| 763 range = ctx->ranges.elts; | |
| 272 | 764 |
| 473 | 765 #if (NGX_HTTP_CACHE) |
| 766 body_start = r->cached ? r->cache->body_start : 0; | |
| 767 #else | |
| 768 body_start = 0; | |
| 769 #endif | |
| 770 | |
| 272 | 771 for (i = 0; i < ctx->ranges.nelts; i++) { |
| 50 | 772 |
| 272 | 773 /* |
| 774 * The boundary header of the range: | |
| 775 * CRLF | |
| 776 * "--0123456789" CRLF | |
| 777 * "Content-Type: image/jpeg" CRLF | |
| 778 * "Content-Range: bytes " | |
| 779 */ | |
| 50 | 780 |
| 272 | 781 b = ngx_calloc_buf(r->pool); |
| 782 if (b == NULL) { | |
| 783 return NGX_ERROR; | |
| 784 } | |
| 50 | 785 |
| 272 | 786 b->memory = 1; |
| 787 b->pos = ctx->boundary_header.data; | |
| 788 b->last = ctx->boundary_header.data + ctx->boundary_header.len; | |
| 50 | 789 |
| 272 | 790 hcl = ngx_alloc_chain_link(r->pool); |
| 791 if (hcl == NULL) { | |
| 792 return NGX_ERROR; | |
| 793 } | |
| 50 | 794 |
| 272 | 795 hcl->buf = b; |
| 50 | 796 |
| 797 | |
| 272 | 798 /* "SSSS-EEEE/TTTT" CRLF CRLF */ |
| 50 | 799 |
| 800 b = ngx_calloc_buf(r->pool); | |
| 801 if (b == NULL) { | |
| 802 return NGX_ERROR; | |
| 803 } | |
| 804 | |
| 805 b->temporary = 1; | |
| 272 | 806 b->pos = range[i].content_range.data; |
| 807 b->last = range[i].content_range.data + range[i].content_range.len; | |
| 808 | |
| 809 rcl = ngx_alloc_chain_link(r->pool); | |
| 810 if (rcl == NULL) { | |
| 811 return NGX_ERROR; | |
| 812 } | |
| 813 | |
| 814 rcl->buf = b; | |
| 815 | |
| 816 | |
| 817 /* the range data */ | |
| 818 | |
| 819 b = ngx_calloc_buf(r->pool); | |
| 820 if (b == NULL) { | |
| 821 return NGX_ERROR; | |
| 822 } | |
| 50 | 823 |
| 272 | 824 b->in_file = buf->in_file; |
| 825 b->temporary = buf->temporary; | |
| 826 b->memory = buf->memory; | |
| 827 b->mmap = buf->mmap; | |
| 828 b->file = buf->file; | |
| 829 | |
| 830 if (buf->in_file) { | |
| 473 | 831 b->file_pos = body_start + range[i].start; |
| 832 b->file_last = body_start + range[i].end; | |
| 272 | 833 } |
| 834 | |
| 835 if (ngx_buf_in_memory(buf)) { | |
| 282 | 836 b->pos = buf->start + (size_t) range[i].start; |
| 837 b->last = buf->start + (size_t) range[i].end; | |
| 272 | 838 } |
| 839 | |
| 840 dcl = ngx_alloc_chain_link(r->pool); | |
| 841 if (dcl == NULL) { | |
| 50 | 842 return NGX_ERROR; |
| 843 } | |
| 844 | |
| 272 | 845 dcl->buf = b; |
| 50 | 846 |
| 847 *ll = hcl; | |
| 272 | 848 hcl->next = rcl; |
| 849 rcl->next = dcl; | |
| 850 ll = &dcl->next; | |
| 851 } | |
| 50 | 852 |
| 272 | 853 /* the last boundary CRLF "--0123456789--" CRLF */ |
| 854 | |
| 855 b = ngx_calloc_buf(r->pool); | |
| 856 if (b == NULL) { | |
| 857 return NGX_ERROR; | |
| 858 } | |
| 859 | |
| 860 b->temporary = 1; | |
| 861 b->last_buf = 1; | |
| 862 | |
| 382 | 863 b->pos = ngx_pnalloc(r->pool, sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN |
| 864 + sizeof("--" CRLF) - 1); | |
| 272 | 865 if (b->pos == NULL) { |
| 866 return NGX_ERROR; | |
| 50 | 867 } |
| 868 | |
| 300 | 869 b->last = ngx_cpymem(b->pos, ctx->boundary_header.data, |
| 870 sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN); | |
| 272 | 871 *b->last++ = '-'; *b->last++ = '-'; |
| 872 *b->last++ = CR; *b->last++ = LF; | |
| 873 | |
| 874 hcl = ngx_alloc_chain_link(r->pool); | |
| 875 if (hcl == NULL) { | |
| 876 return NGX_ERROR; | |
| 877 } | |
| 50 | 878 |
| 272 | 879 hcl->buf = b; |
| 880 hcl->next = NULL; | |
| 881 | |
| 882 *ll = hcl; | |
| 883 | |
| 884 return ngx_http_next_body_filter(r, out); | |
| 50 | 885 } |
| 886 | |
| 887 | |
| 888 static ngx_int_t | |
|
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889 ngx_http_range_body_early_filter(ngx_http_request_t *r, ngx_chain_t *in) |
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|
890 { |
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|
891 if (!r->allow_ranges || r->late_ranges) { |
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892 return ngx_http_next_body_early_filter(r, in); |
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changeset
|
893 } |
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1d9bef53cd8e
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parents:
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changeset
|
894 |
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Range filter: late_ranges functionality.
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parents:
390
diff
changeset
|
895 return ngx_http_range_body_generic_filter(r, in, |
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parents:
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changeset
|
896 ngx_http_next_body_early_filter); |
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|
897 } |
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parents:
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changeset
|
898 |
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Range filter: late_ranges functionality.
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parents:
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changeset
|
899 |
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Range filter: late_ranges functionality.
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parents:
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changeset
|
900 static ngx_int_t |
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901 ngx_http_range_body_late_filter(ngx_http_request_t *r, ngx_chain_t *in) |
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parents:
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|
902 { |
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parents:
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|
903 if (!r->allow_ranges || !r->late_ranges) { |
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904 return ngx_http_next_body_late_filter(r, in); |
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1d9bef53cd8e
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parents:
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|
905 } |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
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parents:
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changeset
|
906 |
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1d9bef53cd8e
Range filter: late_ranges functionality.
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parents:
390
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changeset
|
907 return ngx_http_range_body_generic_filter(r, in, |
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908 ngx_http_next_body_late_filter); |
|
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Range filter: late_ranges functionality.
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909 } |
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Range filter: late_ranges functionality.
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parents:
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910 |
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Range filter: late_ranges functionality.
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parents:
390
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911 |
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912 static ngx_int_t |
| 230 | 913 ngx_http_range_header_filter_init(ngx_conf_t *cf) |
| 50 | 914 { |
| 915 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 916 ngx_http_top_header_filter = ngx_http_range_header_filter; | |
| 917 | |
| 918 return NGX_OK; | |
| 919 } | |
| 920 | |
| 921 | |
| 922 static ngx_int_t | |
| 230 | 923 ngx_http_range_body_filter_init(ngx_conf_t *cf) |
| 50 | 924 { |
|
391
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925 ngx_http_next_body_early_filter = ngx_http_top_body_filter; |
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926 ngx_http_top_body_filter = ngx_http_range_body_early_filter; |
| 50 | 927 |
| 928 return NGX_OK; | |
| 929 } | |
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391
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parents:
390
diff
changeset
|
930 |
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Range filter: late_ranges functionality.
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parents:
390
diff
changeset
|
931 |
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Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
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932 static ngx_int_t |
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Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
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933 ngx_http_range_late_filter_init(ngx_conf_t *cf) |
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1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
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changeset
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934 { |
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1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
935 ngx_http_next_body_late_filter = ngx_http_top_body_filter; |
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Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
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936 ngx_http_top_body_filter = ngx_http_range_body_late_filter; |
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1d9bef53cd8e
Range filter: late_ranges functionality.
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parents:
390
diff
changeset
|
937 |
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Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
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938 return NGX_OK; |
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Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
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939 } |