Mercurial > hg > nginx
annotate src/http/modules/ngx_http_slice_filter_module.c @ 6962:a97ad1663ef4
Slice filter: allowed at most one subrequest at a time.
Previously, if slice main request write handler was called while a slice
subrequest was running, a new subrequest for the same slice was started.
| author | Roman Arutyunyan <arut@nginx.com> |
|---|---|
| date | Tue, 28 Mar 2017 14:03:57 +0300 |
| parents | d16ba0ea3434 |
| children | 3ff293cfdab8 |
| rev | line source |
|---|---|
| 6317 | 1 |
| 2 /* | |
| 3 * Copyright (C) Roman Arutyunyan | |
| 4 * Copyright (C) Nginx, Inc. | |
| 5 */ | |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_http.h> | |
| 11 | |
| 12 | |
| 13 typedef struct { | |
|
6962
a97ad1663ef4
Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
|
14 size_t size; |
| 6317 | 15 } ngx_http_slice_loc_conf_t; |
| 16 | |
| 17 | |
| 18 typedef struct { | |
|
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Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
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19 off_t start; |
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Slice filter: allowed at most one subrequest at a time.
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parents:
6907
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20 off_t end; |
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Slice filter: allowed at most one subrequest at a time.
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parents:
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diff
changeset
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21 ngx_str_t range; |
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Slice filter: allowed at most one subrequest at a time.
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parents:
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22 ngx_str_t etag; |
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Slice filter: allowed at most one subrequest at a time.
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parents:
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23 ngx_uint_t last; /* unsigned last:1; */ |
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Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
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24 ngx_http_request_t *sr; |
| 6317 | 25 } ngx_http_slice_ctx_t; |
| 26 | |
| 27 | |
| 28 typedef struct { | |
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Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
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29 off_t start; |
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Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
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30 off_t end; |
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Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
|
31 off_t complete_length; |
| 6317 | 32 } ngx_http_slice_content_range_t; |
| 33 | |
| 34 | |
| 35 static ngx_int_t ngx_http_slice_header_filter(ngx_http_request_t *r); | |
| 36 static ngx_int_t ngx_http_slice_body_filter(ngx_http_request_t *r, | |
| 37 ngx_chain_t *in); | |
| 38 static ngx_int_t ngx_http_slice_parse_content_range(ngx_http_request_t *r, | |
| 39 ngx_http_slice_content_range_t *cr); | |
| 40 static ngx_int_t ngx_http_slice_range_variable(ngx_http_request_t *r, | |
| 41 ngx_http_variable_value_t *v, uintptr_t data); | |
| 42 static off_t ngx_http_slice_get_start(ngx_http_request_t *r); | |
| 43 static void *ngx_http_slice_create_loc_conf(ngx_conf_t *cf); | |
| 44 static char *ngx_http_slice_merge_loc_conf(ngx_conf_t *cf, void *parent, | |
| 45 void *child); | |
| 46 static ngx_int_t ngx_http_slice_add_variables(ngx_conf_t *cf); | |
| 47 static ngx_int_t ngx_http_slice_init(ngx_conf_t *cf); | |
| 48 | |
| 49 | |
| 50 static ngx_command_t ngx_http_slice_filter_commands[] = { | |
| 51 | |
| 52 { ngx_string("slice"), | |
| 53 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 54 ngx_conf_set_size_slot, | |
| 55 NGX_HTTP_LOC_CONF_OFFSET, | |
| 56 offsetof(ngx_http_slice_loc_conf_t, size), | |
| 57 NULL }, | |
| 58 | |
| 59 ngx_null_command | |
| 60 }; | |
| 61 | |
| 62 | |
| 63 static ngx_http_module_t ngx_http_slice_filter_module_ctx = { | |
| 64 ngx_http_slice_add_variables, /* preconfiguration */ | |
| 65 ngx_http_slice_init, /* postconfiguration */ | |
| 66 | |
| 67 NULL, /* create main configuration */ | |
| 68 NULL, /* init main configuration */ | |
| 69 | |
| 70 NULL, /* create server configuration */ | |
| 71 NULL, /* merge server configuration */ | |
| 72 | |
| 73 ngx_http_slice_create_loc_conf, /* create location configuration */ | |
| 74 ngx_http_slice_merge_loc_conf /* merge location configuration */ | |
| 75 }; | |
| 76 | |
| 77 | |
| 78 ngx_module_t ngx_http_slice_filter_module = { | |
| 79 NGX_MODULE_V1, | |
| 80 &ngx_http_slice_filter_module_ctx, /* module context */ | |
| 81 ngx_http_slice_filter_commands, /* module directives */ | |
| 82 NGX_HTTP_MODULE, /* module type */ | |
| 83 NULL, /* init master */ | |
| 84 NULL, /* init module */ | |
| 85 NULL, /* init process */ | |
| 86 NULL, /* init thread */ | |
| 87 NULL, /* exit thread */ | |
| 88 NULL, /* exit process */ | |
| 89 NULL, /* exit master */ | |
| 90 NGX_MODULE_V1_PADDING | |
| 91 }; | |
| 92 | |
| 93 | |
| 94 static ngx_str_t ngx_http_slice_range_name = ngx_string("slice_range"); | |
| 95 | |
| 96 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
| 97 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
| 98 | |
| 99 | |
| 100 static ngx_int_t | |
| 101 ngx_http_slice_header_filter(ngx_http_request_t *r) | |
| 102 { | |
| 103 off_t end; | |
| 104 ngx_int_t rc; | |
| 105 ngx_table_elt_t *h; | |
| 106 ngx_http_slice_ctx_t *ctx; | |
| 107 ngx_http_slice_loc_conf_t *slcf; | |
| 108 ngx_http_slice_content_range_t cr; | |
| 109 | |
| 110 ctx = ngx_http_get_module_ctx(r, ngx_http_slice_filter_module); | |
| 111 if (ctx == NULL) { | |
| 112 return ngx_http_next_header_filter(r); | |
| 113 } | |
| 114 | |
| 115 if (r->headers_out.status != NGX_HTTP_PARTIAL_CONTENT) { | |
| 116 if (r == r->main) { | |
| 117 ngx_http_set_ctx(r, NULL, ngx_http_slice_filter_module); | |
| 118 return ngx_http_next_header_filter(r); | |
| 119 } | |
| 120 | |
| 121 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 122 "unexpected status code %ui in slice response", | |
| 123 r->headers_out.status); | |
| 124 return NGX_ERROR; | |
| 125 } | |
| 126 | |
| 127 h = r->headers_out.etag; | |
| 128 | |
| 129 if (ctx->etag.len) { | |
| 130 if (h == NULL | |
| 131 || h->value.len != ctx->etag.len | |
| 132 || ngx_strncmp(h->value.data, ctx->etag.data, ctx->etag.len) | |
| 133 != 0) | |
| 134 { | |
| 135 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 136 "etag mismatch in slice response"); | |
| 137 return NGX_ERROR; | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 if (h) { | |
| 142 ctx->etag = h->value; | |
| 143 } | |
| 144 | |
| 145 if (ngx_http_slice_parse_content_range(r, &cr) != NGX_OK) { | |
| 146 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 147 "invalid range in slice response"); | |
| 148 return NGX_ERROR; | |
| 149 } | |
| 150 | |
| 151 if (cr.complete_length == -1) { | |
| 152 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 153 "no complete length in slice response"); | |
| 154 return NGX_ERROR; | |
| 155 } | |
| 156 | |
| 157 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 158 "http slice response range: %O-%O/%O", | |
| 159 cr.start, cr.end, cr.complete_length); | |
| 160 | |
| 161 slcf = ngx_http_get_module_loc_conf(r, ngx_http_slice_filter_module); | |
| 162 | |
| 163 end = ngx_min(cr.start + (off_t) slcf->size, cr.complete_length); | |
| 164 | |
| 165 if (cr.start != ctx->start || cr.end != end) { | |
| 166 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
| 167 "unexpected range in slice response: %O-%O", | |
| 168 cr.start, cr.end); | |
| 169 return NGX_ERROR; | |
| 170 } | |
| 171 | |
| 172 ctx->start = end; | |
| 173 | |
| 174 r->headers_out.status = NGX_HTTP_OK; | |
| 175 r->headers_out.status_line.len = 0; | |
| 176 r->headers_out.content_length_n = cr.complete_length; | |
| 177 r->headers_out.content_offset = cr.start; | |
| 178 r->headers_out.content_range->hash = 0; | |
| 179 r->headers_out.content_range = NULL; | |
| 180 | |
| 181 r->allow_ranges = 1; | |
| 182 r->subrequest_ranges = 1; | |
| 183 r->single_range = 1; | |
| 184 | |
| 185 rc = ngx_http_next_header_filter(r); | |
| 186 | |
| 187 if (r != r->main) { | |
| 188 return rc; | |
| 189 } | |
| 190 | |
| 191 if (r->headers_out.status == NGX_HTTP_PARTIAL_CONTENT) { | |
| 192 if (ctx->start + (off_t) slcf->size <= r->headers_out.content_offset) { | |
| 193 ctx->start = slcf->size | |
| 194 * (r->headers_out.content_offset / slcf->size); | |
| 195 } | |
| 196 | |
| 197 ctx->end = r->headers_out.content_offset | |
| 198 + r->headers_out.content_length_n; | |
| 199 | |
| 200 } else { | |
| 201 ctx->end = cr.complete_length; | |
| 202 } | |
| 203 | |
| 204 return rc; | |
| 205 } | |
| 206 | |
| 207 | |
| 208 static ngx_int_t | |
| 209 ngx_http_slice_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
| 210 { | |
| 211 ngx_int_t rc; | |
| 212 ngx_chain_t *cl; | |
| 213 ngx_http_slice_ctx_t *ctx; | |
| 214 ngx_http_slice_loc_conf_t *slcf; | |
| 215 | |
| 216 ctx = ngx_http_get_module_ctx(r, ngx_http_slice_filter_module); | |
| 217 | |
| 218 if (ctx == NULL || r != r->main) { | |
| 219 return ngx_http_next_body_filter(r, in); | |
| 220 } | |
| 221 | |
| 222 for (cl = in; cl; cl = cl->next) { | |
| 223 if (cl->buf->last_buf) { | |
| 224 cl->buf->last_buf = 0; | |
|
6322
4f0f4f02c98f
Slice filter: terminate first slice with last_in_chain flag.
Roman Arutyunyan <arut@nginx.com>
parents:
6321
diff
changeset
|
225 cl->buf->last_in_chain = 1; |
| 6317 | 226 cl->buf->sync = 1; |
| 227 ctx->last = 1; | |
| 228 } | |
| 229 } | |
| 230 | |
| 231 rc = ngx_http_next_body_filter(r, in); | |
| 232 | |
| 233 if (rc == NGX_ERROR || !ctx->last) { | |
| 234 return rc; | |
| 235 } | |
| 236 | |
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a97ad1663ef4
Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
|
237 if (ctx->sr && !ctx->sr->done) { |
|
a97ad1663ef4
Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
|
238 return rc; |
|
a97ad1663ef4
Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
|
239 } |
|
a97ad1663ef4
Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
|
240 |
| 6317 | 241 if (ctx->start >= ctx->end) { |
| 242 ngx_http_set_ctx(r, NULL, ngx_http_slice_filter_module); | |
| 243 ngx_http_send_special(r, NGX_HTTP_LAST); | |
| 244 return rc; | |
| 245 } | |
| 246 | |
|
6321
bc9ea464e354
Slice filter: never run subrequests when main request is buffered.
Roman Arutyunyan <arut@nginx.com>
parents:
6317
diff
changeset
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247 if (r->buffered) { |
|
bc9ea464e354
Slice filter: never run subrequests when main request is buffered.
Roman Arutyunyan <arut@nginx.com>
parents:
6317
diff
changeset
|
248 return rc; |
|
bc9ea464e354
Slice filter: never run subrequests when main request is buffered.
Roman Arutyunyan <arut@nginx.com>
parents:
6317
diff
changeset
|
249 } |
|
bc9ea464e354
Slice filter: never run subrequests when main request is buffered.
Roman Arutyunyan <arut@nginx.com>
parents:
6317
diff
changeset
|
250 |
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6962
a97ad1663ef4
Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
|
251 if (ngx_http_subrequest(r, &r->uri, &r->args, &ctx->sr, NULL, |
|
6907
d16ba0ea3434
Slice filter: fetch slices in cloned subrequests.
Roman Arutyunyan <arut@nginx.com>
parents:
6322
diff
changeset
|
252 NGX_HTTP_SUBREQUEST_CLONE) |
|
d16ba0ea3434
Slice filter: fetch slices in cloned subrequests.
Roman Arutyunyan <arut@nginx.com>
parents:
6322
diff
changeset
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253 != NGX_OK) |
|
d16ba0ea3434
Slice filter: fetch slices in cloned subrequests.
Roman Arutyunyan <arut@nginx.com>
parents:
6322
diff
changeset
|
254 { |
| 6317 | 255 return NGX_ERROR; |
| 256 } | |
| 257 | |
|
6962
a97ad1663ef4
Slice filter: allowed at most one subrequest at a time.
Roman Arutyunyan <arut@nginx.com>
parents:
6907
diff
changeset
|
258 ngx_http_set_ctx(ctx->sr, ctx, ngx_http_slice_filter_module); |
| 6317 | 259 |
| 260 slcf = ngx_http_get_module_loc_conf(r, ngx_http_slice_filter_module); | |
| 261 | |
| 262 ctx->range.len = ngx_sprintf(ctx->range.data, "bytes=%O-%O", ctx->start, | |
| 263 ctx->start + (off_t) slcf->size - 1) | |
| 264 - ctx->range.data; | |
| 265 | |
| 266 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 267 "http slice subrequest: \"%V\"", &ctx->range); | |
| 268 | |
| 269 return rc; | |
| 270 } | |
| 271 | |
| 272 | |
| 273 static ngx_int_t | |
| 274 ngx_http_slice_parse_content_range(ngx_http_request_t *r, | |
| 275 ngx_http_slice_content_range_t *cr) | |
| 276 { | |
| 277 off_t start, end, complete_length, cutoff, cutlim; | |
| 278 u_char *p; | |
| 279 ngx_table_elt_t *h; | |
| 280 | |
| 281 h = r->headers_out.content_range; | |
| 282 | |
| 283 if (h == NULL | |
| 284 || h->value.len < 7 | |
| 285 || ngx_strncmp(h->value.data, "bytes ", 6) != 0) | |
| 286 { | |
| 287 return NGX_ERROR; | |
| 288 } | |
| 289 | |
| 290 p = h->value.data + 6; | |
| 291 | |
| 292 cutoff = NGX_MAX_OFF_T_VALUE / 10; | |
| 293 cutlim = NGX_MAX_OFF_T_VALUE % 10; | |
| 294 | |
| 295 start = 0; | |
| 296 end = 0; | |
| 297 complete_length = 0; | |
| 298 | |
| 299 while (*p == ' ') { p++; } | |
| 300 | |
| 301 if (*p < '0' || *p > '9') { | |
| 302 return NGX_ERROR; | |
| 303 } | |
| 304 | |
| 305 while (*p >= '0' && *p <= '9') { | |
| 306 if (start >= cutoff && (start > cutoff || *p - '0' > cutlim)) { | |
| 307 return NGX_ERROR; | |
| 308 } | |
| 309 | |
| 310 start = start * 10 + *p++ - '0'; | |
| 311 } | |
| 312 | |
| 313 while (*p == ' ') { p++; } | |
| 314 | |
| 315 if (*p++ != '-') { | |
| 316 return NGX_ERROR; | |
| 317 } | |
| 318 | |
| 319 while (*p == ' ') { p++; } | |
| 320 | |
| 321 if (*p < '0' || *p > '9') { | |
| 322 return NGX_ERROR; | |
| 323 } | |
| 324 | |
| 325 while (*p >= '0' && *p <= '9') { | |
| 326 if (end >= cutoff && (end > cutoff || *p - '0' > cutlim)) { | |
| 327 return NGX_ERROR; | |
| 328 } | |
| 329 | |
| 330 end = end * 10 + *p++ - '0'; | |
| 331 } | |
| 332 | |
| 333 end++; | |
| 334 | |
| 335 while (*p == ' ') { p++; } | |
| 336 | |
| 337 if (*p++ != '/') { | |
| 338 return NGX_ERROR; | |
| 339 } | |
| 340 | |
| 341 while (*p == ' ') { p++; } | |
| 342 | |
| 343 if (*p != '*') { | |
| 344 if (*p < '0' || *p > '9') { | |
| 345 return NGX_ERROR; | |
| 346 } | |
| 347 | |
| 348 while (*p >= '0' && *p <= '9') { | |
| 349 if (complete_length >= cutoff | |
| 350 && (complete_length > cutoff || *p - '0' > cutlim)) | |
| 351 { | |
| 352 return NGX_ERROR; | |
| 353 } | |
| 354 | |
| 355 complete_length = complete_length * 10 + *p++ - '0'; | |
| 356 } | |
| 357 | |
| 358 } else { | |
| 359 complete_length = -1; | |
| 360 p++; | |
| 361 } | |
| 362 | |
| 363 while (*p == ' ') { p++; } | |
| 364 | |
| 365 if (*p != '\0') { | |
| 366 return NGX_ERROR; | |
| 367 } | |
| 368 | |
| 369 cr->start = start; | |
| 370 cr->end = end; | |
| 371 cr->complete_length = complete_length; | |
| 372 | |
| 373 return NGX_OK; | |
| 374 } | |
| 375 | |
| 376 | |
| 377 static ngx_int_t | |
| 378 ngx_http_slice_range_variable(ngx_http_request_t *r, | |
| 379 ngx_http_variable_value_t *v, uintptr_t data) | |
| 380 { | |
| 381 u_char *p; | |
| 382 ngx_http_slice_ctx_t *ctx; | |
| 383 ngx_http_slice_loc_conf_t *slcf; | |
| 384 | |
| 385 ctx = ngx_http_get_module_ctx(r, ngx_http_slice_filter_module); | |
| 386 | |
| 387 if (ctx == NULL) { | |
| 388 if (r != r->main || r->headers_out.status) { | |
| 389 v->not_found = 1; | |
| 390 return NGX_OK; | |
| 391 } | |
| 392 | |
| 393 slcf = ngx_http_get_module_loc_conf(r, ngx_http_slice_filter_module); | |
| 394 | |
| 395 if (slcf->size == 0) { | |
| 396 v->not_found = 1; | |
| 397 return NGX_OK; | |
| 398 } | |
| 399 | |
| 400 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_slice_ctx_t)); | |
| 401 if (ctx == NULL) { | |
| 402 return NGX_ERROR; | |
| 403 } | |
| 404 | |
| 405 ngx_http_set_ctx(r, ctx, ngx_http_slice_filter_module); | |
| 406 | |
| 407 p = ngx_pnalloc(r->pool, sizeof("bytes=-") - 1 + 2 * NGX_OFF_T_LEN); | |
| 408 if (p == NULL) { | |
| 409 return NGX_ERROR; | |
| 410 } | |
| 411 | |
| 412 ctx->start = slcf->size * (ngx_http_slice_get_start(r) / slcf->size); | |
| 413 | |
| 414 ctx->range.data = p; | |
| 415 ctx->range.len = ngx_sprintf(p, "bytes=%O-%O", ctx->start, | |
| 416 ctx->start + (off_t) slcf->size - 1) | |
| 417 - p; | |
| 418 } | |
| 419 | |
| 420 v->data = ctx->range.data; | |
| 421 v->valid = 1; | |
| 422 v->not_found = 0; | |
| 423 v->no_cacheable = 1; | |
| 424 v->len = ctx->range.len; | |
| 425 | |
| 426 return NGX_OK; | |
| 427 } | |
| 428 | |
| 429 | |
| 430 static off_t | |
| 431 ngx_http_slice_get_start(ngx_http_request_t *r) | |
| 432 { | |
| 433 off_t start, cutoff, cutlim; | |
| 434 u_char *p; | |
| 435 ngx_table_elt_t *h; | |
| 436 | |
| 437 if (r->headers_in.if_range) { | |
| 438 return 0; | |
| 439 } | |
| 440 | |
| 441 h = r->headers_in.range; | |
| 442 | |
| 443 if (h == NULL | |
| 444 || h->value.len < 7 | |
| 445 || ngx_strncasecmp(h->value.data, (u_char *) "bytes=", 6) != 0) | |
| 446 { | |
| 447 return 0; | |
| 448 } | |
| 449 | |
| 450 p = h->value.data + 6; | |
| 451 | |
| 452 if (ngx_strchr(p, ',')) { | |
| 453 return 0; | |
| 454 } | |
| 455 | |
| 456 while (*p == ' ') { p++; } | |
| 457 | |
| 458 if (*p == '-') { | |
| 459 return 0; | |
| 460 } | |
| 461 | |
| 462 cutoff = NGX_MAX_OFF_T_VALUE / 10; | |
| 463 cutlim = NGX_MAX_OFF_T_VALUE % 10; | |
| 464 | |
| 465 start = 0; | |
| 466 | |
| 467 while (*p >= '0' && *p <= '9') { | |
| 468 if (start >= cutoff && (start > cutoff || *p - '0' > cutlim)) { | |
| 469 return 0; | |
| 470 } | |
| 471 | |
| 472 start = start * 10 + *p++ - '0'; | |
| 473 } | |
| 474 | |
| 475 return start; | |
| 476 } | |
| 477 | |
| 478 | |
| 479 static void * | |
| 480 ngx_http_slice_create_loc_conf(ngx_conf_t *cf) | |
| 481 { | |
| 482 ngx_http_slice_loc_conf_t *slcf; | |
| 483 | |
| 484 slcf = ngx_palloc(cf->pool, sizeof(ngx_http_slice_loc_conf_t)); | |
| 485 if (slcf == NULL) { | |
| 486 return NULL; | |
| 487 } | |
| 488 | |
| 489 slcf->size = NGX_CONF_UNSET_SIZE; | |
| 490 | |
| 491 return slcf; | |
| 492 } | |
| 493 | |
| 494 | |
| 495 static char * | |
| 496 ngx_http_slice_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 497 { | |
| 498 ngx_http_slice_loc_conf_t *prev = parent; | |
| 499 ngx_http_slice_loc_conf_t *conf = child; | |
| 500 | |
| 501 ngx_conf_merge_size_value(conf->size, prev->size, 0); | |
| 502 | |
| 503 return NGX_CONF_OK; | |
| 504 } | |
| 505 | |
| 506 | |
| 507 static ngx_int_t | |
| 508 ngx_http_slice_add_variables(ngx_conf_t *cf) | |
| 509 { | |
| 510 ngx_http_variable_t *var; | |
| 511 | |
| 512 var = ngx_http_add_variable(cf, &ngx_http_slice_range_name, 0); | |
| 513 if (var == NULL) { | |
| 514 return NGX_ERROR; | |
| 515 } | |
| 516 | |
| 517 var->get_handler = ngx_http_slice_range_variable; | |
| 518 | |
| 519 return NGX_OK; | |
| 520 } | |
| 521 | |
| 522 | |
| 523 static ngx_int_t | |
| 524 ngx_http_slice_init(ngx_conf_t *cf) | |
| 525 { | |
| 526 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
| 527 ngx_http_top_header_filter = ngx_http_slice_header_filter; | |
| 528 | |
| 529 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
| 530 ngx_http_top_body_filter = ngx_http_slice_body_filter; | |
| 531 | |
| 532 return NGX_OK; | |
| 533 } |