Mercurial > hg > nginx-ranges
annotate src/http/modules/ngx_http_range_filter_module.c @ 396:77df96611112
Merge with current.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Tue, 05 Aug 2008 02:12:51 +0400 |
| parents | 1d9bef53cd8e 0b6053502c55 |
| children | 44a61c599bb2 |
| 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)) | |
| 225 == NGX_ERROR) | |
| 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; | |
| 237 | |
| 238 if (ctx->ranges.nelts == 1) { | |
| 239 return ngx_http_range_singlepart_header(r, ctx); | |
| 240 } | |
| 241 | |
| 242 return ngx_http_range_multipart_header(r, ctx); | |
| 243 } | |
| 244 | |
| 245 if (rc == NGX_HTTP_RANGE_NOT_SATISFIABLE) { | |
| 246 return ngx_http_range_not_satisfiable(r); | |
| 247 } | |
| 248 | |
| 249 /* rc == NGX_ERROR */ | |
| 250 | |
| 251 return rc; | |
| 252 | |
| 253 next_filter: | |
| 254 | |
| 255 r->headers_out.accept_ranges = ngx_list_push(&r->headers_out.headers); | |
| 256 if (r->headers_out.accept_ranges == NULL) { | |
| 257 return NGX_ERROR; | |
| 258 } | |
| 259 | |
| 260 r->headers_out.accept_ranges->hash = 1; | |
| 261 r->headers_out.accept_ranges->key.len = sizeof("Accept-Ranges") - 1; | |
| 262 r->headers_out.accept_ranges->key.data = (u_char *) "Accept-Ranges"; | |
| 263 r->headers_out.accept_ranges->value.len = sizeof("bytes") - 1; | |
| 264 r->headers_out.accept_ranges->value.data = (u_char *) "bytes"; | |
| 265 | |
| 266 return ngx_http_next_header_filter(r); | |
| 267 } | |
| 268 | |
| 269 | |
| 270 ngx_int_t | |
| 271 ngx_http_range_parse(ngx_http_request_t *r, ngx_http_range_filter_ctx_t *ctx) | |
| 272 { | |
| 273 u_char *p; | |
| 274 off_t start, end; | |
| 275 ngx_uint_t suffix; | |
| 276 ngx_http_range_t *range; | |
| 277 | |
| 50 | 278 p = r->headers_in.range->value.data + 6; |
| 279 | |
| 280 for ( ;; ) { | |
| 281 start = 0; | |
| 282 end = 0; | |
| 283 suffix = 0; | |
| 284 | |
| 285 while (*p == ' ') { p++; } | |
| 286 | |
| 287 if (*p != '-') { | |
| 288 if (*p < '0' || *p > '9') { | |
| 392 | 289 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 290 } |
| 291 | |
| 292 while (*p >= '0' && *p <= '9') { | |
| 293 start = start * 10 + *p++ - '0'; | |
| 294 } | |
| 295 | |
| 296 while (*p == ' ') { p++; } | |
| 297 | |
| 298 if (*p++ != '-') { | |
| 392 | 299 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 300 } |
| 301 | |
| 302 if (start >= r->headers_out.content_length_n) { | |
| 392 | 303 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 304 } |
| 305 | |
| 306 while (*p == ' ') { p++; } | |
| 307 | |
| 308 if (*p == ',' || *p == '\0') { | |
| 272 | 309 range = ngx_array_push(&ctx->ranges); |
| 50 | 310 if (range == NULL) { |
| 311 return NGX_ERROR; | |
| 312 } | |
| 313 | |
| 314 range->start = start; | |
| 315 range->end = r->headers_out.content_length_n; | |
| 316 | |
| 317 if (*p++ != ',') { | |
| 392 | 318 return NGX_OK; |
| 50 | 319 } |
| 320 | |
| 321 continue; | |
| 322 } | |
| 323 | |
| 324 } else { | |
| 325 suffix = 1; | |
| 326 p++; | |
| 327 } | |
| 328 | |
| 329 if (*p < '0' || *p > '9') { | |
| 392 | 330 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 331 } |
| 332 | |
| 333 while (*p >= '0' && *p <= '9') { | |
| 334 end = end * 10 + *p++ - '0'; | |
| 335 } | |
| 336 | |
| 337 while (*p == ' ') { p++; } | |
| 338 | |
| 339 if (*p != ',' && *p != '\0') { | |
| 392 | 340 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 341 } |
| 342 | |
| 343 if (suffix) { | |
| 344 start = r->headers_out.content_length_n - end; | |
| 345 end = r->headers_out.content_length_n - 1; | |
| 346 } | |
| 347 | |
| 348 if (start > end) { | |
| 392 | 349 return NGX_HTTP_RANGE_NOT_SATISFIABLE; |
| 50 | 350 } |
| 351 | |
| 272 | 352 range = ngx_array_push(&ctx->ranges); |
| 50 | 353 if (range == NULL) { |
| 354 return NGX_ERROR; | |
| 355 } | |
| 356 | |
| 357 range->start = start; | |
| 358 | |
| 359 if (end >= r->headers_out.content_length_n) { | |
| 360 /* | |
| 361 * Download Accelerator sends the last byte position | |
| 362 * that equals to the file length | |
| 363 */ | |
| 364 range->end = r->headers_out.content_length_n; | |
| 365 | |
| 366 } else { | |
| 367 range->end = end + 1; | |
| 368 } | |
| 369 | |
| 370 if (*p++ != ',') { | |
| 392 | 371 return NGX_OK; |
| 50 | 372 } |
| 373 } | |
| 392 | 374 } |
| 375 | |
| 376 | |
| 377 static ngx_int_t | |
| 378 ngx_http_range_singlepart_header(ngx_http_request_t *r, | |
| 379 ngx_http_range_filter_ctx_t *ctx) | |
| 380 { | |
| 381 ngx_table_elt_t *content_range; | |
| 382 ngx_http_range_t *range; | |
| 383 | |
| 384 content_range = ngx_list_push(&r->headers_out.headers); | |
| 385 if (content_range == NULL) { | |
| 386 return NGX_ERROR; | |
| 387 } | |
| 50 | 388 |
| 392 | 389 r->headers_out.content_range = content_range; |
| 50 | 390 |
| 392 | 391 content_range->hash = 1; |
| 392 content_range->key.len = sizeof("Content-Range") - 1; | |
| 393 content_range->key.data = (u_char *) "Content-Range"; | |
| 50 | 394 |
| 392 | 395 content_range->value.data = ngx_pnalloc(r->pool, |
| 396 sizeof("bytes -/") - 1 + 3 * NGX_OFF_T_LEN); | |
| 397 if (content_range->value.data == NULL) { | |
| 398 return NGX_ERROR; | |
| 50 | 399 } |
| 400 | |
| 392 | 401 /* "Content-Range: bytes SSSS-EEEE/TTTT" header */ |
| 50 | 402 |
| 392 | 403 range = ctx->ranges.elts; |
| 50 | 404 |
| 392 | 405 content_range->value.len = ngx_sprintf(content_range->value.data, |
| 406 "bytes %O-%O/%O", | |
| 407 range->start, range->end - 1, | |
| 408 r->headers_out.content_length_n) | |
| 409 - content_range->value.data; | |
| 50 | 410 |
| 392 | 411 r->headers_out.content_length_n = range->end - range->start; |
| 50 | 412 |
| 392 | 413 if (r->headers_out.content_length) { |
| 414 r->headers_out.content_length->hash = 0; | |
| 415 r->headers_out.content_length = NULL; | |
| 50 | 416 } |
| 417 | |
| 392 | 418 return ngx_http_next_header_filter(r); |
| 419 } | |
| 50 | 420 |
| 392 | 421 |
| 422 static ngx_int_t | |
| 423 ngx_http_range_multipart_header(ngx_http_request_t *r, | |
| 424 ngx_http_range_filter_ctx_t *ctx) | |
| 425 { | |
| 426 size_t len; | |
| 427 ngx_uint_t i; | |
| 428 ngx_http_range_t *range; | |
| 429 ngx_atomic_uint_t boundary; | |
| 50 | 430 |
| 431 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN | |
| 432 + sizeof(CRLF "Content-Type: ") - 1 | |
| 58 | 433 + r->headers_out.content_type.len |
| 50 | 434 + sizeof(CRLF "Content-Range: bytes ") - 1; |
| 435 | |
| 436 if (r->headers_out.charset.len) { | |
| 437 len += sizeof("; charset=") - 1 + r->headers_out.charset.len; | |
| 438 } | |
| 439 | |
| 382 | 440 ctx->boundary_header.data = ngx_pnalloc(r->pool, len); |
| 50 | 441 if (ctx->boundary_header.data == NULL) { |
| 442 return NGX_ERROR; | |
| 443 } | |
| 444 | |
| 445 boundary = ngx_next_temp_number(0); | |
| 446 | |
| 447 /* | |
| 448 * The boundary header of the range: | |
| 449 * CRLF | |
| 450 * "--0123456789" CRLF | |
| 451 * "Content-Type: image/jpeg" CRLF | |
| 452 * "Content-Range: bytes " | |
| 453 */ | |
| 454 | |
| 455 if (r->headers_out.charset.len) { | |
| 456 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
| 457 CRLF "--%0muA" CRLF | |
| 458 "Content-Type: %V; charset=%V" CRLF | |
| 459 "Content-Range: bytes ", | |
| 460 boundary, | |
| 58 | 461 &r->headers_out.content_type, |
| 50 | 462 &r->headers_out.charset) |
| 463 - ctx->boundary_header.data; | |
| 464 | |
| 465 r->headers_out.charset.len = 0; | |
| 466 | |
| 392 | 467 } else if (r->headers_out.content_type.len) { |
| 50 | 468 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, |
| 469 CRLF "--%0muA" CRLF | |
| 470 "Content-Type: %V" CRLF | |
| 471 "Content-Range: bytes ", | |
| 472 boundary, | |
| 58 | 473 &r->headers_out.content_type) |
| 50 | 474 - ctx->boundary_header.data; |
| 392 | 475 |
| 476 } else { | |
| 477 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data, | |
| 478 CRLF "--%0muA" CRLF | |
| 479 "Content-Range: bytes ", | |
| 480 boundary) | |
| 481 - ctx->boundary_header.data; | |
| 50 | 482 } |
| 483 | |
| 58 | 484 r->headers_out.content_type.data = |
| 382 | 485 ngx_pnalloc(r->pool, |
| 486 sizeof("Content-Type: multipart/byteranges; boundary=") - 1 | |
| 487 + NGX_ATOMIC_T_LEN); | |
| 50 | 488 |
| 58 | 489 if (r->headers_out.content_type.data == NULL) { |
| 50 | 490 return NGX_ERROR; |
| 491 } | |
| 492 | |
| 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 |
| 501 | |
| 502 /* the size of the last boundary CRLF "--0123456789--" CRLF */ | |
| 503 | |
| 504 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN + sizeof("--" CRLF) - 1; | |
| 505 | |
| 272 | 506 range = ctx->ranges.elts; |
| 507 for (i = 0; i < ctx->ranges.nelts; i++) { | |
| 50 | 508 |
| 509 /* the size of the range: "SSSS-EEEE/TTTT" CRLF CRLF */ | |
| 510 | |
| 511 range[i].content_range.data = | |
| 382 | 512 ngx_pnalloc(r->pool, 3 * NGX_OFF_T_LEN + 2 + 4); |
| 50 | 513 |
| 514 if (range[i].content_range.data == NULL) { | |
| 515 return NGX_ERROR; | |
| 516 } | |
| 517 | |
| 518 range[i].content_range.len = ngx_sprintf(range[i].content_range.data, | |
| 519 "%O-%O/%O" CRLF CRLF, | |
| 520 range[i].start, range[i].end - 1, | |
| 521 r->headers_out.content_length_n) | |
| 522 - range[i].content_range.data; | |
| 523 | |
| 524 len += ctx->boundary_header.len + range[i].content_range.len | |
| 525 + (size_t) (range[i].end - range[i].start); | |
| 526 } | |
| 527 | |
| 528 r->headers_out.content_length_n = len; | |
| 272 | 529 |
| 530 if (r->headers_out.content_length) { | |
| 531 r->headers_out.content_length->hash = 0; | |
| 532 r->headers_out.content_length = NULL; | |
| 533 } | |
| 50 | 534 |
| 535 return ngx_http_next_header_filter(r); | |
| 392 | 536 } |
| 346 | 537 |
| 538 | |
| 392 | 539 static ngx_int_t |
| 540 ngx_http_range_not_satisfiable(ngx_http_request_t *r) | |
| 541 { | |
| 542 ngx_table_elt_t *content_range; | |
| 543 | |
| 544 r->headers_out.status = NGX_HTTP_RANGE_NOT_SATISFIABLE; | |
| 545 | |
| 546 content_range = ngx_list_push(&r->headers_out.headers); | |
| 547 if (content_range == NULL) { | |
| 346 | 548 return NGX_ERROR; |
| 549 } | |
| 550 | |
| 392 | 551 r->headers_out.content_range = content_range; |
| 552 | |
| 553 content_range->hash = 1; | |
| 554 content_range->key.len = sizeof("Content-Range") - 1; | |
| 555 content_range->key.data = (u_char *) "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 | |
| 696 buf->pos = buf->last; | |
| 697 continue; | |
| 272 | 698 } |
| 50 | 699 |
| 392 | 700 if (range->start > start) { |
| 701 | |
| 702 if (buf->in_file) { | |
| 703 buf->file_pos += range->start - start; | |
| 704 } | |
| 705 | |
| 706 if (ngx_buf_in_memory(buf)) { | |
| 707 buf->pos += (size_t) (range->start - start); | |
| 708 } | |
| 50 | 709 } |
| 710 | |
| 392 | 711 if (range->end <= last) { |
| 712 | |
| 713 if (buf->in_file) { | |
| 714 buf->file_last -= last - range->end; | |
| 715 } | |
| 716 | |
| 717 if (ngx_buf_in_memory(buf)) { | |
| 718 buf->last -= (size_t) (last - range->end); | |
| 719 } | |
| 720 | |
| 721 buf->last_buf = 1; | |
| 722 *ll = cl; | |
| 723 cl->next = NULL; | |
| 724 | |
| 725 break; | |
| 726 } | |
| 727 | |
| 728 *ll = cl; | |
| 729 ll = &cl->next; | |
| 272 | 730 } |
| 50 | 731 |
| 392 | 732 if (out == NULL) { |
| 733 return NGX_OK; | |
| 734 } | |
| 735 | |
| 736 return ngx_http_next_body_filter(r, out); | |
| 737 } | |
| 738 | |
| 739 | |
| 740 static ngx_int_t | |
| 741 ngx_http_range_multipart_body(ngx_http_request_t *r, | |
| 396 | 742 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in, |
| 743 ngx_http_output_body_filter_pt ngx_http_next_body_filter) | |
| 392 | 744 { |
| 745 ngx_buf_t *b, *buf; | |
| 746 ngx_uint_t i; | |
| 747 ngx_chain_t *out, *hcl, *rcl, *dcl, **ll; | |
| 748 ngx_http_range_t *range; | |
| 749 | |
| 272 | 750 ll = &out; |
| 392 | 751 buf = in->buf; |
| 752 range = ctx->ranges.elts; | |
| 272 | 753 |
| 754 for (i = 0; i < ctx->ranges.nelts; i++) { | |
| 50 | 755 |
| 272 | 756 /* |
| 757 * The boundary header of the range: | |
| 758 * CRLF | |
| 759 * "--0123456789" CRLF | |
| 760 * "Content-Type: image/jpeg" CRLF | |
| 761 * "Content-Range: bytes " | |
| 762 */ | |
| 50 | 763 |
| 272 | 764 b = ngx_calloc_buf(r->pool); |
| 765 if (b == NULL) { | |
| 766 return NGX_ERROR; | |
| 767 } | |
| 50 | 768 |
| 272 | 769 b->memory = 1; |
| 770 b->pos = ctx->boundary_header.data; | |
| 771 b->last = ctx->boundary_header.data + ctx->boundary_header.len; | |
| 50 | 772 |
| 272 | 773 hcl = ngx_alloc_chain_link(r->pool); |
| 774 if (hcl == NULL) { | |
| 775 return NGX_ERROR; | |
| 776 } | |
| 50 | 777 |
| 272 | 778 hcl->buf = b; |
| 50 | 779 |
| 780 | |
| 272 | 781 /* "SSSS-EEEE/TTTT" CRLF CRLF */ |
| 50 | 782 |
| 783 b = ngx_calloc_buf(r->pool); | |
| 784 if (b == NULL) { | |
| 785 return NGX_ERROR; | |
| 786 } | |
| 787 | |
| 788 b->temporary = 1; | |
| 272 | 789 b->pos = range[i].content_range.data; |
| 790 b->last = range[i].content_range.data + range[i].content_range.len; | |
| 791 | |
| 792 rcl = ngx_alloc_chain_link(r->pool); | |
| 793 if (rcl == NULL) { | |
| 794 return NGX_ERROR; | |
| 795 } | |
| 796 | |
| 797 rcl->buf = b; | |
| 798 | |
| 799 | |
| 800 /* the range data */ | |
| 801 | |
| 802 b = ngx_calloc_buf(r->pool); | |
| 803 if (b == NULL) { | |
| 804 return NGX_ERROR; | |
| 805 } | |
| 50 | 806 |
| 272 | 807 b->in_file = buf->in_file; |
| 808 b->temporary = buf->temporary; | |
| 809 b->memory = buf->memory; | |
| 810 b->mmap = buf->mmap; | |
| 811 b->file = buf->file; | |
| 812 | |
| 813 if (buf->in_file) { | |
| 282 | 814 b->file_pos = range[i].start; |
| 815 b->file_last = range[i].end; | |
| 272 | 816 } |
| 817 | |
| 818 if (ngx_buf_in_memory(buf)) { | |
| 282 | 819 b->pos = buf->start + (size_t) range[i].start; |
| 820 b->last = buf->start + (size_t) range[i].end; | |
| 272 | 821 } |
| 822 | |
| 823 dcl = ngx_alloc_chain_link(r->pool); | |
| 824 if (dcl == NULL) { | |
| 50 | 825 return NGX_ERROR; |
| 826 } | |
| 827 | |
| 272 | 828 dcl->buf = b; |
| 50 | 829 |
| 830 *ll = hcl; | |
| 272 | 831 hcl->next = rcl; |
| 832 rcl->next = dcl; | |
| 833 ll = &dcl->next; | |
| 834 } | |
| 50 | 835 |
| 272 | 836 /* the last boundary CRLF "--0123456789--" CRLF */ |
| 837 | |
| 838 b = ngx_calloc_buf(r->pool); | |
| 839 if (b == NULL) { | |
| 840 return NGX_ERROR; | |
| 841 } | |
| 842 | |
| 843 b->temporary = 1; | |
| 844 b->last_buf = 1; | |
| 845 | |
| 382 | 846 b->pos = ngx_pnalloc(r->pool, sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN |
| 847 + sizeof("--" CRLF) - 1); | |
| 272 | 848 if (b->pos == NULL) { |
| 849 return NGX_ERROR; | |
| 50 | 850 } |
| 851 | |
| 300 | 852 b->last = ngx_cpymem(b->pos, ctx->boundary_header.data, |
| 853 sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN); | |
| 272 | 854 *b->last++ = '-'; *b->last++ = '-'; |
| 855 *b->last++ = CR; *b->last++ = LF; | |
| 856 | |
| 857 hcl = ngx_alloc_chain_link(r->pool); | |
| 858 if (hcl == NULL) { | |
| 859 return NGX_ERROR; | |
| 860 } | |
| 50 | 861 |
| 272 | 862 hcl->buf = b; |
| 863 hcl->next = NULL; | |
| 864 | |
| 865 *ll = hcl; | |
| 866 | |
| 867 return ngx_http_next_body_filter(r, out); | |
| 50 | 868 } |
| 869 | |
| 870 | |
| 871 static ngx_int_t | |
|
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872 ngx_http_range_body_early_filter(ngx_http_request_t *r, ngx_chain_t *in) |
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873 { |
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874 if (!r->allow_ranges || r->late_ranges) { |
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875 return ngx_http_next_body_early_filter(r, in); |
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876 } |
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877 |
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878 return ngx_http_range_body_generic_filter(r, in, |
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879 ngx_http_next_body_early_filter); |
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|
880 } |
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parents:
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|
881 |
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|
882 |
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883 static ngx_int_t |
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884 ngx_http_range_body_late_filter(ngx_http_request_t *r, ngx_chain_t *in) |
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885 { |
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886 if (!r->allow_ranges || !r->late_ranges) { |
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887 return ngx_http_next_body_late_filter(r, in); |
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888 } |
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889 |
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890 return ngx_http_range_body_generic_filter(r, in, |
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891 ngx_http_next_body_late_filter); |
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892 } |
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893 |
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|
894 |
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|
895 static ngx_int_t |
| 230 | 896 ngx_http_range_header_filter_init(ngx_conf_t *cf) |
| 50 | 897 { |
| 898 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 899 ngx_http_top_header_filter = ngx_http_range_header_filter; | |
| 900 | |
| 901 return NGX_OK; | |
| 902 } | |
| 903 | |
| 904 | |
| 905 static ngx_int_t | |
| 230 | 906 ngx_http_range_body_filter_init(ngx_conf_t *cf) |
| 50 | 907 { |
|
391
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
908 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
|
909 ngx_http_top_body_filter = ngx_http_range_body_early_filter; |
| 50 | 910 |
| 911 return NGX_OK; | |
| 912 } | |
|
391
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
913 |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
914 |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
915 static ngx_int_t |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
916 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
|
917 { |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
918 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
|
919 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
|
920 |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
921 return NGX_OK; |
|
1d9bef53cd8e
Range filter: late_ranges functionality.
Maxim Dounin <mdounin@mdounin.ru>
parents:
390
diff
changeset
|
922 } |