|
50
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
660
|
4 * Copyright (C) Nginx, Inc.
|
|
50
|
5 */
|
|
|
6
|
|
|
7
|
|
|
8 #include <ngx_config.h>
|
|
|
9 #include <ngx_core.h>
|
|
|
10 #include <ngx_http.h>
|
|
|
11
|
|
|
12
|
|
|
13 /*
|
|
|
14 * the single part format:
|
|
|
15 *
|
|
|
16 * "HTTP/1.0 206 Partial Content" CRLF
|
|
|
17 * ... header ...
|
|
|
18 * "Content-Type: image/jpeg" CRLF
|
|
|
19 * "Content-Length: SIZE" CRLF
|
|
|
20 * "Content-Range: bytes START-END/SIZE" CRLF
|
|
|
21 * CRLF
|
|
|
22 * ... data ...
|
|
|
23 *
|
|
|
24 *
|
|
|
25 * the mutlipart format:
|
|
|
26 *
|
|
|
27 * "HTTP/1.0 206 Partial Content" CRLF
|
|
|
28 * ... header ...
|
|
|
29 * "Content-Type: multipart/byteranges; boundary=0123456789" CRLF
|
|
|
30 * CRLF
|
|
|
31 * CRLF
|
|
|
32 * "--0123456789" CRLF
|
|
|
33 * "Content-Type: image/jpeg" CRLF
|
|
|
34 * "Content-Range: bytes START0-END0/SIZE" CRLF
|
|
|
35 * CRLF
|
|
|
36 * ... data ...
|
|
|
37 * CRLF
|
|
|
38 * "--0123456789" CRLF
|
|
|
39 * "Content-Type: image/jpeg" CRLF
|
|
|
40 * "Content-Range: bytes START1-END1/SIZE" CRLF
|
|
|
41 * CRLF
|
|
|
42 * ... data ...
|
|
|
43 * CRLF
|
|
|
44 * "--0123456789--" CRLF
|
|
|
45 */
|
|
|
46
|
|
|
47
|
|
|
48 typedef struct {
|
|
272
|
49 off_t start;
|
|
|
50 off_t end;
|
|
|
51 ngx_str_t content_range;
|
|
|
52 } ngx_http_range_t;
|
|
|
53
|
|
|
54
|
|
|
55 typedef struct {
|
|
|
56 off_t offset;
|
|
|
57 ngx_str_t boundary_header;
|
|
|
58 ngx_array_t ranges;
|
|
50
|
59 } ngx_http_range_filter_ctx_t;
|
|
|
60
|
|
|
61
|
|
636
|
62 static ngx_int_t ngx_http_range_parse(ngx_http_request_t *r,
|
|
|
63 ngx_http_range_filter_ctx_t *ctx, ngx_uint_t ranges);
|
|
390
|
64 static ngx_int_t ngx_http_range_singlepart_header(ngx_http_request_t *r,
|
|
|
65 ngx_http_range_filter_ctx_t *ctx);
|
|
|
66 static ngx_int_t ngx_http_range_multipart_header(ngx_http_request_t *r,
|
|
|
67 ngx_http_range_filter_ctx_t *ctx);
|
|
|
68 static ngx_int_t ngx_http_range_not_satisfiable(ngx_http_request_t *r);
|
|
|
69 static ngx_int_t ngx_http_range_test_overlapped(ngx_http_request_t *r,
|
|
|
70 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
|
|
|
71 static ngx_int_t ngx_http_range_singlepart_body(ngx_http_request_t *r,
|
|
|
72 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
|
|
|
73 static ngx_int_t ngx_http_range_multipart_body(ngx_http_request_t *r,
|
|
|
74 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in);
|
|
|
75
|
|
230
|
76 static ngx_int_t ngx_http_range_header_filter_init(ngx_conf_t *cf);
|
|
|
77 static ngx_int_t ngx_http_range_body_filter_init(ngx_conf_t *cf);
|
|
50
|
78
|
|
|
79
|
|
|
80 static ngx_http_module_t ngx_http_range_header_filter_module_ctx = {
|
|
58
|
81 NULL, /* preconfiguration */
|
|
230
|
82 ngx_http_range_header_filter_init, /* postconfiguration */
|
|
50
|
83
|
|
|
84 NULL, /* create main configuration */
|
|
|
85 NULL, /* init main configuration */
|
|
|
86
|
|
|
87 NULL, /* create server configuration */
|
|
|
88 NULL, /* merge server configuration */
|
|
|
89
|
|
|
90 NULL, /* create location configuration */
|
|
|
91 NULL, /* merge location configuration */
|
|
|
92 };
|
|
|
93
|
|
|
94
|
|
|
95 ngx_module_t ngx_http_range_header_filter_module = {
|
|
58
|
96 NGX_MODULE_V1,
|
|
50
|
97 &ngx_http_range_header_filter_module_ctx, /* module context */
|
|
|
98 NULL, /* module directives */
|
|
|
99 NGX_HTTP_MODULE, /* module type */
|
|
90
|
100 NULL, /* init master */
|
|
230
|
101 NULL, /* init module */
|
|
90
|
102 NULL, /* init process */
|
|
|
103 NULL, /* init thread */
|
|
|
104 NULL, /* exit thread */
|
|
|
105 NULL, /* exit process */
|
|
|
106 NULL, /* exit master */
|
|
|
107 NGX_MODULE_V1_PADDING
|
|
50
|
108 };
|
|
|
109
|
|
|
110
|
|
|
111 static ngx_http_module_t ngx_http_range_body_filter_module_ctx = {
|
|
58
|
112 NULL, /* preconfiguration */
|
|
230
|
113 ngx_http_range_body_filter_init, /* postconfiguration */
|
|
50
|
114
|
|
|
115 NULL, /* create main configuration */
|
|
|
116 NULL, /* init main configuration */
|
|
|
117
|
|
|
118 NULL, /* create server configuration */
|
|
|
119 NULL, /* merge server configuration */
|
|
|
120
|
|
|
121 NULL, /* create location configuration */
|
|
|
122 NULL, /* merge location configuration */
|
|
|
123 };
|
|
|
124
|
|
|
125
|
|
|
126 ngx_module_t ngx_http_range_body_filter_module = {
|
|
58
|
127 NGX_MODULE_V1,
|
|
50
|
128 &ngx_http_range_body_filter_module_ctx, /* module context */
|
|
|
129 NULL, /* module directives */
|
|
|
130 NGX_HTTP_MODULE, /* module type */
|
|
90
|
131 NULL, /* init master */
|
|
230
|
132 NULL, /* init module */
|
|
90
|
133 NULL, /* init process */
|
|
|
134 NULL, /* init thread */
|
|
|
135 NULL, /* exit thread */
|
|
|
136 NULL, /* exit process */
|
|
|
137 NULL, /* exit master */
|
|
|
138 NGX_MODULE_V1_PADDING
|
|
50
|
139 };
|
|
|
140
|
|
|
141
|
|
|
142 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
|
|
|
143 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
|
|
|
144
|
|
|
145
|
|
|
146 static ngx_int_t
|
|
|
147 ngx_http_range_header_filter(ngx_http_request_t *r)
|
|
|
148 {
|
|
680
|
149 time_t if_range_time;
|
|
|
150 ngx_str_t *if_range, *etag;
|
|
636
|
151 ngx_http_core_loc_conf_t *clcf;
|
|
50
|
152 ngx_http_range_filter_ctx_t *ctx;
|
|
|
153
|
|
|
154 if (r->http_version < NGX_HTTP_VERSION_10
|
|
|
155 || r->headers_out.status != NGX_HTTP_OK
|
|
146
|
156 || r != r->main
|
|
50
|
157 || r->headers_out.content_length_n == -1
|
|
130
|
158 || !r->allow_ranges)
|
|
50
|
159 {
|
|
|
160 return ngx_http_next_header_filter(r);
|
|
|
161 }
|
|
|
162
|
|
636
|
163 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
164
|
|
|
165 if (clcf->max_ranges == 0) {
|
|
|
166 return ngx_http_next_header_filter(r);
|
|
|
167 }
|
|
|
168
|
|
50
|
169 if (r->headers_in.range == NULL
|
|
|
170 || r->headers_in.range->value.len < 7
|
|
286
|
171 || ngx_strncasecmp(r->headers_in.range->value.data,
|
|
|
172 (u_char *) "bytes=", 6)
|
|
|
173 != 0)
|
|
50
|
174 {
|
|
346
|
175 goto next_filter;
|
|
|
176 }
|
|
|
177
|
|
680
|
178 if (r->headers_in.if_range) {
|
|
|
179
|
|
|
180 if_range = &r->headers_in.if_range->value;
|
|
|
181
|
|
|
182 if (if_range->len >= 2 && if_range->data[if_range->len - 1] == '"') {
|
|
|
183
|
|
|
184 if (r->headers_out.etag == NULL) {
|
|
|
185 goto next_filter;
|
|
|
186 }
|
|
|
187
|
|
|
188 etag = &r->headers_out.etag->value;
|
|
|
189
|
|
|
190 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
191 "http ir:%V etag:%V", if_range, etag);
|
|
346
|
192
|
|
680
|
193 if (if_range->len != etag->len
|
|
|
194 || ngx_strncmp(if_range->data, etag->data, etag->len) != 0)
|
|
|
195 {
|
|
|
196 goto next_filter;
|
|
|
197 }
|
|
|
198
|
|
|
199 goto parse;
|
|
|
200 }
|
|
|
201
|
|
|
202 if (r->headers_out.last_modified_time == (time_t) -1) {
|
|
|
203 goto next_filter;
|
|
|
204 }
|
|
|
205
|
|
|
206 if_range_time = ngx_http_parse_time(if_range->data, if_range->len);
|
|
50
|
207
|
|
346
|
208 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
209 "http ir:%d lm:%d",
|
|
680
|
210 if_range_time, r->headers_out.last_modified_time);
|
|
50
|
211
|
|
680
|
212 if (if_range_time != r->headers_out.last_modified_time) {
|
|
346
|
213 goto next_filter;
|
|
|
214 }
|
|
50
|
215 }
|
|
|
216
|
|
680
|
217 parse:
|
|
|
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))
|
|
454
|
225 != NGX_OK)
|
|
50
|
226 {
|
|
|
227 return NGX_ERROR;
|
|
|
228 }
|
|
|
229
|
|
636
|
230 switch (ngx_http_range_parse(r, ctx, clcf->max_ranges)) {
|
|
390
|
231
|
|
636
|
232 case NGX_OK:
|
|
390
|
233 ngx_http_set_ctx(r, ctx, ngx_http_range_body_filter_module);
|
|
|
234
|
|
|
235 r->headers_out.status = NGX_HTTP_PARTIAL_CONTENT;
|
|
464
|
236 r->headers_out.status_line.len = 0;
|
|
390
|
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);
|
|
636
|
243
|
|
|
244 case NGX_HTTP_RANGE_NOT_SATISFIABLE:
|
|
|
245 return ngx_http_range_not_satisfiable(r);
|
|
390
|
246
|
|
636
|
247 case NGX_ERROR:
|
|
|
248 return NGX_ERROR;
|
|
|
249
|
|
|
250 default: /* NGX_DECLINED */
|
|
|
251 break;
|
|
390
|
252 }
|
|
|
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;
|
|
570
|
262 ngx_str_set(&r->headers_out.accept_ranges->key, "Accept-Ranges");
|
|
|
263 ngx_str_set(&r->headers_out.accept_ranges->value, "bytes");
|
|
390
|
264
|
|
|
265 return ngx_http_next_header_filter(r);
|
|
|
266 }
|
|
|
267
|
|
|
268
|
|
636
|
269 static ngx_int_t
|
|
|
270 ngx_http_range_parse(ngx_http_request_t *r, ngx_http_range_filter_ctx_t *ctx,
|
|
|
271 ngx_uint_t ranges)
|
|
390
|
272 {
|
|
|
273 u_char *p;
|
|
636
|
274 off_t start, end, size, content_length;
|
|
390
|
275 ngx_uint_t suffix;
|
|
|
276 ngx_http_range_t *range;
|
|
|
277
|
|
50
|
278 p = r->headers_in.range->value.data + 6;
|
|
636
|
279 size = 0;
|
|
|
280 content_length = r->headers_out.content_length_n;
|
|
50
|
281
|
|
|
282 for ( ;; ) {
|
|
|
283 start = 0;
|
|
|
284 end = 0;
|
|
|
285 suffix = 0;
|
|
|
286
|
|
|
287 while (*p == ' ') { p++; }
|
|
|
288
|
|
|
289 if (*p != '-') {
|
|
|
290 if (*p < '0' || *p > '9') {
|
|
390
|
291 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
50
|
292 }
|
|
|
293
|
|
|
294 while (*p >= '0' && *p <= '9') {
|
|
|
295 start = start * 10 + *p++ - '0';
|
|
|
296 }
|
|
|
297
|
|
|
298 while (*p == ' ') { p++; }
|
|
|
299
|
|
|
300 if (*p++ != '-') {
|
|
390
|
301 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
50
|
302 }
|
|
|
303
|
|
|
304 while (*p == ' ') { p++; }
|
|
|
305
|
|
|
306 if (*p == ',' || *p == '\0') {
|
|
636
|
307 end = content_length;
|
|
|
308 goto found;
|
|
50
|
309 }
|
|
|
310
|
|
|
311 } else {
|
|
|
312 suffix = 1;
|
|
|
313 p++;
|
|
|
314 }
|
|
|
315
|
|
|
316 if (*p < '0' || *p > '9') {
|
|
390
|
317 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
50
|
318 }
|
|
|
319
|
|
|
320 while (*p >= '0' && *p <= '9') {
|
|
|
321 end = end * 10 + *p++ - '0';
|
|
|
322 }
|
|
|
323
|
|
|
324 while (*p == ' ') { p++; }
|
|
|
325
|
|
|
326 if (*p != ',' && *p != '\0') {
|
|
390
|
327 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
50
|
328 }
|
|
|
329
|
|
|
330 if (suffix) {
|
|
636
|
331 start = content_length - end;
|
|
|
332 end = content_length - 1;
|
|
50
|
333 }
|
|
|
334
|
|
636
|
335 if (end >= content_length) {
|
|
|
336 end = content_length;
|
|
|
337
|
|
|
338 } else {
|
|
|
339 end++;
|
|
50
|
340 }
|
|
|
341
|
|
636
|
342 found:
|
|
50
|
343
|
|
636
|
344 if (start < end) {
|
|
|
345 range = ngx_array_push(&ctx->ranges);
|
|
|
346 if (range == NULL) {
|
|
|
347 return NGX_ERROR;
|
|
|
348 }
|
|
50
|
349
|
|
636
|
350 range->start = start;
|
|
|
351 range->end = end;
|
|
50
|
352
|
|
636
|
353 size += end - start;
|
|
|
354
|
|
|
355 if (ranges-- == 0) {
|
|
|
356 return NGX_DECLINED;
|
|
|
357 }
|
|
50
|
358 }
|
|
|
359
|
|
|
360 if (*p++ != ',') {
|
|
636
|
361 break;
|
|
50
|
362 }
|
|
|
363 }
|
|
636
|
364
|
|
|
365 if (ctx->ranges.nelts == 0) {
|
|
|
366 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
|
367 }
|
|
|
368
|
|
|
369 if (size > content_length) {
|
|
|
370 return NGX_DECLINED;
|
|
|
371 }
|
|
|
372
|
|
|
373 return NGX_OK;
|
|
390
|
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
|
|
390
|
389 r->headers_out.content_range = content_range;
|
|
50
|
390
|
|
390
|
391 content_range->hash = 1;
|
|
570
|
392 ngx_str_set(&content_range->key, "Content-Range");
|
|
50
|
393
|
|
390
|
394 content_range->value.data = ngx_pnalloc(r->pool,
|
|
|
395 sizeof("bytes -/") - 1 + 3 * NGX_OFF_T_LEN);
|
|
|
396 if (content_range->value.data == NULL) {
|
|
|
397 return NGX_ERROR;
|
|
50
|
398 }
|
|
|
399
|
|
390
|
400 /* "Content-Range: bytes SSSS-EEEE/TTTT" header */
|
|
50
|
401
|
|
390
|
402 range = ctx->ranges.elts;
|
|
50
|
403
|
|
390
|
404 content_range->value.len = ngx_sprintf(content_range->value.data,
|
|
|
405 "bytes %O-%O/%O",
|
|
|
406 range->start, range->end - 1,
|
|
|
407 r->headers_out.content_length_n)
|
|
|
408 - content_range->value.data;
|
|
50
|
409
|
|
390
|
410 r->headers_out.content_length_n = range->end - range->start;
|
|
50
|
411
|
|
390
|
412 if (r->headers_out.content_length) {
|
|
|
413 r->headers_out.content_length->hash = 0;
|
|
|
414 r->headers_out.content_length = NULL;
|
|
50
|
415 }
|
|
|
416
|
|
390
|
417 return ngx_http_next_header_filter(r);
|
|
|
418 }
|
|
50
|
419
|
|
390
|
420
|
|
|
421 static ngx_int_t
|
|
|
422 ngx_http_range_multipart_header(ngx_http_request_t *r,
|
|
|
423 ngx_http_range_filter_ctx_t *ctx)
|
|
|
424 {
|
|
|
425 size_t len;
|
|
|
426 ngx_uint_t i;
|
|
|
427 ngx_http_range_t *range;
|
|
|
428 ngx_atomic_uint_t boundary;
|
|
50
|
429
|
|
|
430 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN
|
|
|
431 + sizeof(CRLF "Content-Type: ") - 1
|
|
58
|
432 + r->headers_out.content_type.len
|
|
50
|
433 + sizeof(CRLF "Content-Range: bytes ") - 1;
|
|
|
434
|
|
|
435 if (r->headers_out.charset.len) {
|
|
|
436 len += sizeof("; charset=") - 1 + r->headers_out.charset.len;
|
|
|
437 }
|
|
|
438
|
|
382
|
439 ctx->boundary_header.data = ngx_pnalloc(r->pool, len);
|
|
50
|
440 if (ctx->boundary_header.data == NULL) {
|
|
|
441 return NGX_ERROR;
|
|
|
442 }
|
|
|
443
|
|
|
444 boundary = ngx_next_temp_number(0);
|
|
|
445
|
|
|
446 /*
|
|
|
447 * The boundary header of the range:
|
|
|
448 * CRLF
|
|
|
449 * "--0123456789" CRLF
|
|
|
450 * "Content-Type: image/jpeg" CRLF
|
|
|
451 * "Content-Range: bytes "
|
|
|
452 */
|
|
|
453
|
|
|
454 if (r->headers_out.charset.len) {
|
|
|
455 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
|
456 CRLF "--%0muA" CRLF
|
|
|
457 "Content-Type: %V; charset=%V" CRLF
|
|
|
458 "Content-Range: bytes ",
|
|
|
459 boundary,
|
|
58
|
460 &r->headers_out.content_type,
|
|
50
|
461 &r->headers_out.charset)
|
|
|
462 - ctx->boundary_header.data;
|
|
|
463
|
|
|
464 r->headers_out.charset.len = 0;
|
|
|
465
|
|
390
|
466 } else if (r->headers_out.content_type.len) {
|
|
50
|
467 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
|
468 CRLF "--%0muA" CRLF
|
|
|
469 "Content-Type: %V" CRLF
|
|
|
470 "Content-Range: bytes ",
|
|
|
471 boundary,
|
|
58
|
472 &r->headers_out.content_type)
|
|
50
|
473 - ctx->boundary_header.data;
|
|
390
|
474
|
|
|
475 } else {
|
|
|
476 ctx->boundary_header.len = ngx_sprintf(ctx->boundary_header.data,
|
|
|
477 CRLF "--%0muA" CRLF
|
|
|
478 "Content-Range: bytes ",
|
|
|
479 boundary)
|
|
|
480 - ctx->boundary_header.data;
|
|
50
|
481 }
|
|
|
482
|
|
58
|
483 r->headers_out.content_type.data =
|
|
382
|
484 ngx_pnalloc(r->pool,
|
|
|
485 sizeof("Content-Type: multipart/byteranges; boundary=") - 1
|
|
|
486 + NGX_ATOMIC_T_LEN);
|
|
50
|
487
|
|
58
|
488 if (r->headers_out.content_type.data == NULL) {
|
|
50
|
489 return NGX_ERROR;
|
|
|
490 }
|
|
|
491
|
|
494
|
492 r->headers_out.content_type_lowcase = NULL;
|
|
|
493
|
|
50
|
494 /* "Content-Type: multipart/byteranges; boundary=0123456789" */
|
|
|
495
|
|
58
|
496 r->headers_out.content_type.len =
|
|
|
497 ngx_sprintf(r->headers_out.content_type.data,
|
|
50
|
498 "multipart/byteranges; boundary=%0muA",
|
|
|
499 boundary)
|
|
58
|
500 - r->headers_out.content_type.data;
|
|
50
|
501
|
|
494
|
502 r->headers_out.content_type_len = r->headers_out.content_type.len;
|
|
50
|
503
|
|
|
504 /* the size of the last boundary CRLF "--0123456789--" CRLF */
|
|
|
505
|
|
|
506 len = sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN + sizeof("--" CRLF) - 1;
|
|
|
507
|
|
272
|
508 range = ctx->ranges.elts;
|
|
|
509 for (i = 0; i < ctx->ranges.nelts; i++) {
|
|
50
|
510
|
|
|
511 /* the size of the range: "SSSS-EEEE/TTTT" CRLF CRLF */
|
|
|
512
|
|
|
513 range[i].content_range.data =
|
|
382
|
514 ngx_pnalloc(r->pool, 3 * NGX_OFF_T_LEN + 2 + 4);
|
|
50
|
515
|
|
|
516 if (range[i].content_range.data == NULL) {
|
|
|
517 return NGX_ERROR;
|
|
|
518 }
|
|
|
519
|
|
|
520 range[i].content_range.len = ngx_sprintf(range[i].content_range.data,
|
|
|
521 "%O-%O/%O" CRLF CRLF,
|
|
|
522 range[i].start, range[i].end - 1,
|
|
|
523 r->headers_out.content_length_n)
|
|
|
524 - range[i].content_range.data;
|
|
|
525
|
|
|
526 len += ctx->boundary_header.len + range[i].content_range.len
|
|
|
527 + (size_t) (range[i].end - range[i].start);
|
|
|
528 }
|
|
|
529
|
|
|
530 r->headers_out.content_length_n = len;
|
|
272
|
531
|
|
|
532 if (r->headers_out.content_length) {
|
|
|
533 r->headers_out.content_length->hash = 0;
|
|
|
534 r->headers_out.content_length = NULL;
|
|
|
535 }
|
|
50
|
536
|
|
|
537 return ngx_http_next_header_filter(r);
|
|
390
|
538 }
|
|
346
|
539
|
|
|
540
|
|
390
|
541 static ngx_int_t
|
|
|
542 ngx_http_range_not_satisfiable(ngx_http_request_t *r)
|
|
|
543 {
|
|
|
544 ngx_table_elt_t *content_range;
|
|
|
545
|
|
|
546 r->headers_out.status = NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
|
547
|
|
|
548 content_range = ngx_list_push(&r->headers_out.headers);
|
|
|
549 if (content_range == NULL) {
|
|
346
|
550 return NGX_ERROR;
|
|
|
551 }
|
|
|
552
|
|
390
|
553 r->headers_out.content_range = content_range;
|
|
|
554
|
|
|
555 content_range->hash = 1;
|
|
570
|
556 ngx_str_set(&content_range->key, "Content-Range");
|
|
346
|
557
|
|
390
|
558 content_range->value.data = ngx_pnalloc(r->pool,
|
|
|
559 sizeof("bytes */") - 1 + NGX_OFF_T_LEN);
|
|
|
560 if (content_range->value.data == NULL) {
|
|
|
561 return NGX_ERROR;
|
|
|
562 }
|
|
|
563
|
|
|
564 content_range->value.len = ngx_sprintf(content_range->value.data,
|
|
|
565 "bytes */%O",
|
|
|
566 r->headers_out.content_length_n)
|
|
|
567 - content_range->value.data;
|
|
|
568
|
|
|
569 ngx_http_clear_content_length(r);
|
|
|
570
|
|
|
571 return NGX_HTTP_RANGE_NOT_SATISFIABLE;
|
|
50
|
572 }
|
|
|
573
|
|
|
574
|
|
|
575 static ngx_int_t
|
|
|
576 ngx_http_range_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
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
|
|
390
|
590 if (ctx->ranges.nelts == 1) {
|
|
|
591 return ngx_http_range_singlepart_body(r, ctx, in);
|
|
|
592 }
|
|
|
593
|
|
|
594 /*
|
|
|
595 * multipart ranges are supported only if whole body is in a single buffer
|
|
|
596 */
|
|
272
|
597
|
|
|
598 if (ngx_buf_special(in->buf)) {
|
|
50
|
599 return ngx_http_next_body_filter(r, in);
|
|
|
600 }
|
|
|
601
|
|
390
|
602 if (ngx_http_range_test_overlapped(r, ctx, in) != NGX_OK) {
|
|
|
603 return NGX_ERROR;
|
|
|
604 }
|
|
|
605
|
|
|
606 return ngx_http_range_multipart_body(r, ctx, in);
|
|
|
607 }
|
|
|
608
|
|
|
609
|
|
|
610 static ngx_int_t
|
|
|
611 ngx_http_range_test_overlapped(ngx_http_request_t *r,
|
|
|
612 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
|
613 {
|
|
|
614 off_t start, last;
|
|
|
615 ngx_buf_t *buf;
|
|
|
616 ngx_uint_t i;
|
|
|
617 ngx_http_range_t *range;
|
|
|
618
|
|
272
|
619 if (ctx->offset) {
|
|
|
620 goto overlapped;
|
|
|
621 }
|
|
|
622
|
|
390
|
623 buf = in->buf;
|
|
272
|
624
|
|
|
625 if (!buf->last_buf) {
|
|
662
|
626 start = ctx->offset;
|
|
|
627 last = ctx->offset + ngx_buf_size(buf);
|
|
272
|
628
|
|
390
|
629 range = ctx->ranges.elts;
|
|
272
|
630 for (i = 0; i < ctx->ranges.nelts; i++) {
|
|
|
631 if (start > range[i].start || last < range[i].end) {
|
|
|
632 goto overlapped;
|
|
|
633 }
|
|
|
634 }
|
|
|
635 }
|
|
|
636
|
|
|
637 ctx->offset = ngx_buf_size(buf);
|
|
|
638
|
|
390
|
639 return NGX_OK;
|
|
|
640
|
|
|
641 overlapped:
|
|
|
642
|
|
|
643 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
644 "range in overlapped buffers");
|
|
|
645
|
|
|
646 return NGX_ERROR;
|
|
|
647 }
|
|
|
648
|
|
|
649
|
|
|
650 static ngx_int_t
|
|
|
651 ngx_http_range_singlepart_body(ngx_http_request_t *r,
|
|
|
652 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
|
653 {
|
|
|
654 off_t start, last;
|
|
|
655 ngx_buf_t *buf;
|
|
|
656 ngx_chain_t *out, *cl, **ll;
|
|
|
657 ngx_http_range_t *range;
|
|
|
658
|
|
|
659 out = NULL;
|
|
|
660 ll = &out;
|
|
|
661 range = ctx->ranges.elts;
|
|
50
|
662
|
|
390
|
663 for (cl = in; cl; cl = cl->next) {
|
|
|
664
|
|
|
665 buf = cl->buf;
|
|
|
666
|
|
|
667 start = ctx->offset;
|
|
|
668 last = ctx->offset + ngx_buf_size(buf);
|
|
|
669
|
|
|
670 ctx->offset = last;
|
|
|
671
|
|
|
672 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
673 "http range body buf: %O-%O", start, last);
|
|
|
674
|
|
|
675 if (ngx_buf_special(buf)) {
|
|
|
676 *ll = cl;
|
|
|
677 ll = &cl->next;
|
|
|
678 continue;
|
|
|
679 }
|
|
|
680
|
|
|
681 if (range->end <= start || range->start >= last) {
|
|
|
682
|
|
|
683 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
684 "http range body skip");
|
|
|
685
|
|
412
|
686 if (buf->in_file) {
|
|
|
687 buf->file_pos = buf->file_last;
|
|
|
688 }
|
|
|
689
|
|
390
|
690 buf->pos = buf->last;
|
|
412
|
691 buf->sync = 1;
|
|
|
692
|
|
390
|
693 continue;
|
|
272
|
694 }
|
|
50
|
695
|
|
390
|
696 if (range->start > start) {
|
|
|
697
|
|
|
698 if (buf->in_file) {
|
|
|
699 buf->file_pos += range->start - start;
|
|
|
700 }
|
|
|
701
|
|
|
702 if (ngx_buf_in_memory(buf)) {
|
|
|
703 buf->pos += (size_t) (range->start - start);
|
|
|
704 }
|
|
50
|
705 }
|
|
|
706
|
|
390
|
707 if (range->end <= last) {
|
|
|
708
|
|
|
709 if (buf->in_file) {
|
|
|
710 buf->file_last -= last - range->end;
|
|
|
711 }
|
|
|
712
|
|
|
713 if (ngx_buf_in_memory(buf)) {
|
|
|
714 buf->last -= (size_t) (last - range->end);
|
|
|
715 }
|
|
|
716
|
|
|
717 buf->last_buf = 1;
|
|
|
718 *ll = cl;
|
|
|
719 cl->next = NULL;
|
|
|
720
|
|
|
721 break;
|
|
|
722 }
|
|
|
723
|
|
|
724 *ll = cl;
|
|
|
725 ll = &cl->next;
|
|
272
|
726 }
|
|
50
|
727
|
|
390
|
728 if (out == NULL) {
|
|
|
729 return NGX_OK;
|
|
|
730 }
|
|
|
731
|
|
|
732 return ngx_http_next_body_filter(r, out);
|
|
|
733 }
|
|
|
734
|
|
|
735
|
|
|
736 static ngx_int_t
|
|
|
737 ngx_http_range_multipart_body(ngx_http_request_t *r,
|
|
|
738 ngx_http_range_filter_ctx_t *ctx, ngx_chain_t *in)
|
|
|
739 {
|
|
|
740 ngx_buf_t *b, *buf;
|
|
|
741 ngx_uint_t i;
|
|
|
742 ngx_chain_t *out, *hcl, *rcl, *dcl, **ll;
|
|
|
743 ngx_http_range_t *range;
|
|
|
744
|
|
272
|
745 ll = &out;
|
|
390
|
746 buf = in->buf;
|
|
|
747 range = ctx->ranges.elts;
|
|
272
|
748
|
|
|
749 for (i = 0; i < ctx->ranges.nelts; i++) {
|
|
50
|
750
|
|
272
|
751 /*
|
|
|
752 * The boundary header of the range:
|
|
|
753 * CRLF
|
|
|
754 * "--0123456789" CRLF
|
|
|
755 * "Content-Type: image/jpeg" CRLF
|
|
|
756 * "Content-Range: bytes "
|
|
|
757 */
|
|
50
|
758
|
|
272
|
759 b = ngx_calloc_buf(r->pool);
|
|
|
760 if (b == NULL) {
|
|
|
761 return NGX_ERROR;
|
|
|
762 }
|
|
50
|
763
|
|
272
|
764 b->memory = 1;
|
|
|
765 b->pos = ctx->boundary_header.data;
|
|
|
766 b->last = ctx->boundary_header.data + ctx->boundary_header.len;
|
|
50
|
767
|
|
272
|
768 hcl = ngx_alloc_chain_link(r->pool);
|
|
|
769 if (hcl == NULL) {
|
|
|
770 return NGX_ERROR;
|
|
|
771 }
|
|
50
|
772
|
|
272
|
773 hcl->buf = b;
|
|
50
|
774
|
|
|
775
|
|
272
|
776 /* "SSSS-EEEE/TTTT" CRLF CRLF */
|
|
50
|
777
|
|
|
778 b = ngx_calloc_buf(r->pool);
|
|
|
779 if (b == NULL) {
|
|
|
780 return NGX_ERROR;
|
|
|
781 }
|
|
|
782
|
|
|
783 b->temporary = 1;
|
|
272
|
784 b->pos = range[i].content_range.data;
|
|
|
785 b->last = range[i].content_range.data + range[i].content_range.len;
|
|
|
786
|
|
|
787 rcl = ngx_alloc_chain_link(r->pool);
|
|
|
788 if (rcl == NULL) {
|
|
|
789 return NGX_ERROR;
|
|
|
790 }
|
|
|
791
|
|
|
792 rcl->buf = b;
|
|
|
793
|
|
|
794
|
|
|
795 /* the range data */
|
|
|
796
|
|
|
797 b = ngx_calloc_buf(r->pool);
|
|
|
798 if (b == NULL) {
|
|
|
799 return NGX_ERROR;
|
|
|
800 }
|
|
50
|
801
|
|
272
|
802 b->in_file = buf->in_file;
|
|
|
803 b->temporary = buf->temporary;
|
|
|
804 b->memory = buf->memory;
|
|
|
805 b->mmap = buf->mmap;
|
|
|
806 b->file = buf->file;
|
|
|
807
|
|
|
808 if (buf->in_file) {
|
|
662
|
809 b->file_pos = buf->file_pos + range[i].start;
|
|
|
810 b->file_last = buf->file_pos + range[i].end;
|
|
272
|
811 }
|
|
|
812
|
|
|
813 if (ngx_buf_in_memory(buf)) {
|
|
662
|
814 b->pos = buf->pos + (size_t) range[i].start;
|
|
|
815 b->last = buf->pos + (size_t) range[i].end;
|
|
272
|
816 }
|
|
|
817
|
|
|
818 dcl = ngx_alloc_chain_link(r->pool);
|
|
|
819 if (dcl == NULL) {
|
|
50
|
820 return NGX_ERROR;
|
|
|
821 }
|
|
|
822
|
|
272
|
823 dcl->buf = b;
|
|
50
|
824
|
|
|
825 *ll = hcl;
|
|
272
|
826 hcl->next = rcl;
|
|
|
827 rcl->next = dcl;
|
|
|
828 ll = &dcl->next;
|
|
|
829 }
|
|
50
|
830
|
|
272
|
831 /* the last boundary CRLF "--0123456789--" CRLF */
|
|
|
832
|
|
|
833 b = ngx_calloc_buf(r->pool);
|
|
|
834 if (b == NULL) {
|
|
|
835 return NGX_ERROR;
|
|
|
836 }
|
|
|
837
|
|
|
838 b->temporary = 1;
|
|
|
839 b->last_buf = 1;
|
|
|
840
|
|
382
|
841 b->pos = ngx_pnalloc(r->pool, sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN
|
|
|
842 + sizeof("--" CRLF) - 1);
|
|
272
|
843 if (b->pos == NULL) {
|
|
|
844 return NGX_ERROR;
|
|
50
|
845 }
|
|
|
846
|
|
300
|
847 b->last = ngx_cpymem(b->pos, ctx->boundary_header.data,
|
|
|
848 sizeof(CRLF "--") - 1 + NGX_ATOMIC_T_LEN);
|
|
272
|
849 *b->last++ = '-'; *b->last++ = '-';
|
|
|
850 *b->last++ = CR; *b->last++ = LF;
|
|
|
851
|
|
|
852 hcl = ngx_alloc_chain_link(r->pool);
|
|
|
853 if (hcl == NULL) {
|
|
|
854 return NGX_ERROR;
|
|
|
855 }
|
|
50
|
856
|
|
272
|
857 hcl->buf = b;
|
|
|
858 hcl->next = NULL;
|
|
|
859
|
|
|
860 *ll = hcl;
|
|
|
861
|
|
|
862 return ngx_http_next_body_filter(r, out);
|
|
50
|
863 }
|
|
|
864
|
|
|
865
|
|
|
866 static ngx_int_t
|
|
230
|
867 ngx_http_range_header_filter_init(ngx_conf_t *cf)
|
|
50
|
868 {
|
|
|
869 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
870 ngx_http_top_header_filter = ngx_http_range_header_filter;
|
|
|
871
|
|
|
872 return NGX_OK;
|
|
|
873 }
|
|
|
874
|
|
|
875
|
|
|
876 static ngx_int_t
|
|
230
|
877 ngx_http_range_body_filter_init(ngx_conf_t *cf)
|
|
50
|
878 {
|
|
|
879 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
880 ngx_http_top_body_filter = ngx_http_range_body_filter;
|
|
|
881
|
|
|
882 return NGX_OK;
|
|
|
883 }
|
