|
0
|
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 #include <zlib.h>
|
|
|
12
|
|
|
13
|
|
|
14 typedef struct {
|
|
|
15 ngx_flag_t enable;
|
|
|
16 ngx_flag_t no_buffer;
|
|
|
17
|
|
|
18 ngx_bufs_t bufs;
|
|
|
19
|
|
|
20 ngx_uint_t http_version;
|
|
|
21 ngx_uint_t proxied;
|
|
|
22
|
|
|
23 int level;
|
|
|
24 size_t wbits;
|
|
|
25 size_t memlevel;
|
|
|
26 ssize_t min_length;
|
|
|
27 } ngx_http_gzip_conf_t;
|
|
|
28
|
|
|
29
|
|
|
30 #define NGX_HTTP_GZIP_PROXIED_OFF 0x0002
|
|
|
31 #define NGX_HTTP_GZIP_PROXIED_EXPIRED 0x0004
|
|
|
32 #define NGX_HTTP_GZIP_PROXIED_NO_CACHE 0x0008
|
|
|
33 #define NGX_HTTP_GZIP_PROXIED_NO_STORE 0x0010
|
|
|
34 #define NGX_HTTP_GZIP_PROXIED_PRIVATE 0x0020
|
|
|
35 #define NGX_HTTP_GZIP_PROXIED_NO_LM 0x0040
|
|
|
36 #define NGX_HTTP_GZIP_PROXIED_NO_ETAG 0x0080
|
|
|
37 #define NGX_HTTP_GZIP_PROXIED_AUTH 0x0100
|
|
|
38 #define NGX_HTTP_GZIP_PROXIED_ANY 0x0200
|
|
|
39
|
|
|
40
|
|
|
41 typedef struct {
|
|
|
42 ngx_chain_t *in;
|
|
|
43 ngx_chain_t *free;
|
|
|
44 ngx_chain_t *busy;
|
|
|
45 ngx_chain_t *out;
|
|
|
46 ngx_chain_t **last_out;
|
|
|
47 ngx_buf_t *in_buf;
|
|
|
48 ngx_buf_t *out_buf;
|
|
|
49 ngx_int_t bufs;
|
|
|
50
|
|
|
51 off_t length;
|
|
|
52
|
|
|
53 void *preallocated;
|
|
|
54 char *free_mem;
|
|
|
55 ngx_uint_t allocated;
|
|
|
56
|
|
|
57 unsigned flush:4;
|
|
|
58 unsigned redo:1;
|
|
|
59 unsigned done:1;
|
|
|
60 #if 0
|
|
|
61 unsigned pass:1;
|
|
|
62 unsigned blocked:1;
|
|
|
63 #endif
|
|
|
64
|
|
|
65 size_t zin;
|
|
|
66 size_t zout;
|
|
|
67
|
|
|
68 uint32_t crc32;
|
|
|
69 z_stream zstream;
|
|
|
70 ngx_http_request_t *request;
|
|
|
71 } ngx_http_gzip_ctx_t;
|
|
|
72
|
|
|
73
|
|
|
74 static ngx_int_t ngx_http_gzip_proxied(ngx_http_request_t *r,
|
|
|
75 ngx_http_gzip_conf_t *conf);
|
|
|
76 static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items,
|
|
|
77 u_int size);
|
|
|
78 static void ngx_http_gzip_filter_free(void *opaque, void *address);
|
|
|
79 ngx_inline static int ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx);
|
|
|
80
|
|
|
81 static u_char *ngx_http_gzip_log_ratio(ngx_http_request_t *r, u_char *buf,
|
|
|
82 uintptr_t data);
|
|
|
83
|
|
|
84 static ngx_int_t ngx_http_gzip_pre_conf(ngx_conf_t *cf);
|
|
|
85 static ngx_int_t ngx_http_gzip_filter_init(ngx_cycle_t *cycle);
|
|
|
86 static void *ngx_http_gzip_create_conf(ngx_conf_t *cf);
|
|
|
87 static char *ngx_http_gzip_merge_conf(ngx_conf_t *cf,
|
|
|
88 void *parent, void *child);
|
|
|
89 static char *ngx_http_gzip_set_window(ngx_conf_t *cf, void *post, void *data);
|
|
|
90 static char *ngx_http_gzip_set_hash(ngx_conf_t *cf, void *post, void *data);
|
|
|
91
|
|
|
92
|
|
|
93 static ngx_conf_num_bounds_t ngx_http_gzip_comp_level_bounds = {
|
|
|
94 ngx_conf_check_num_bounds, 1, 9
|
|
|
95 };
|
|
|
96
|
|
|
97 static ngx_conf_post_handler_pt ngx_http_gzip_set_window_p =
|
|
|
98 ngx_http_gzip_set_window;
|
|
|
99 static ngx_conf_post_handler_pt ngx_http_gzip_set_hash_p =
|
|
|
100 ngx_http_gzip_set_hash;
|
|
|
101
|
|
|
102
|
|
|
103
|
|
|
104 static ngx_conf_enum_t ngx_http_gzip_http_version[] = {
|
|
|
105 { ngx_string("1.0"), NGX_HTTP_VERSION_10 },
|
|
|
106 { ngx_string("1.1"), NGX_HTTP_VERSION_11 },
|
|
|
107 { ngx_null_string, 0 }
|
|
|
108 };
|
|
|
109
|
|
|
110
|
|
|
111 static ngx_conf_bitmask_t ngx_http_gzip_proxied_mask[] = {
|
|
|
112 { ngx_string("off"), NGX_HTTP_GZIP_PROXIED_OFF },
|
|
|
113 { ngx_string("expired"), NGX_HTTP_GZIP_PROXIED_EXPIRED },
|
|
|
114 { ngx_string("no-cache"), NGX_HTTP_GZIP_PROXIED_NO_CACHE },
|
|
|
115 { ngx_string("no-store"), NGX_HTTP_GZIP_PROXIED_NO_STORE },
|
|
|
116 { ngx_string("private"), NGX_HTTP_GZIP_PROXIED_PRIVATE },
|
|
|
117 { ngx_string("no_last_modified"), NGX_HTTP_GZIP_PROXIED_NO_LM },
|
|
|
118 { ngx_string("no_etag"), NGX_HTTP_GZIP_PROXIED_NO_ETAG },
|
|
|
119 { ngx_string("auth"), NGX_HTTP_GZIP_PROXIED_AUTH },
|
|
|
120 { ngx_string("any"), NGX_HTTP_GZIP_PROXIED_ANY },
|
|
|
121 { ngx_null_string, 0 }
|
|
|
122 };
|
|
|
123
|
|
|
124
|
|
|
125 static ngx_command_t ngx_http_gzip_filter_commands[] = {
|
|
|
126
|
|
|
127 { ngx_string("gzip"),
|
|
|
128 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
|
|
|
129 ngx_conf_set_flag_slot,
|
|
|
130 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
131 offsetof(ngx_http_gzip_conf_t, enable),
|
|
|
132 NULL },
|
|
|
133
|
|
|
134 { ngx_string("gzip_buffers"),
|
|
|
135 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
|
|
|
136 ngx_conf_set_bufs_slot,
|
|
|
137 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
138 offsetof(ngx_http_gzip_conf_t, bufs),
|
|
|
139 NULL },
|
|
|
140
|
|
|
141 { ngx_string("gzip_comp_level"),
|
|
|
142 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
143 ngx_conf_set_num_slot,
|
|
|
144 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
145 offsetof(ngx_http_gzip_conf_t, level),
|
|
|
146 &ngx_http_gzip_comp_level_bounds },
|
|
|
147
|
|
|
148 { ngx_string("gzip_window"),
|
|
|
149 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
150 ngx_conf_set_size_slot,
|
|
|
151 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
152 offsetof(ngx_http_gzip_conf_t, wbits),
|
|
|
153 &ngx_http_gzip_set_window_p },
|
|
|
154
|
|
|
155 { ngx_string("gzip_hash"),
|
|
|
156 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
157 ngx_conf_set_size_slot,
|
|
|
158 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
159 offsetof(ngx_http_gzip_conf_t, memlevel),
|
|
|
160 &ngx_http_gzip_set_hash_p },
|
|
|
161
|
|
|
162 { ngx_string("gzip_no_buffer"),
|
|
|
163 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
|
|
|
164 ngx_conf_set_flag_slot,
|
|
|
165 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
166 offsetof(ngx_http_gzip_conf_t, no_buffer),
|
|
|
167 NULL },
|
|
|
168
|
|
|
169 { ngx_string("gzip_http_version"),
|
|
|
170 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ANY,
|
|
|
171 ngx_conf_set_enum_slot,
|
|
|
172 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
173 offsetof(ngx_http_gzip_conf_t, http_version),
|
|
|
174 &ngx_http_gzip_http_version },
|
|
|
175
|
|
|
176 { ngx_string("gzip_proxied"),
|
|
|
177 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_ANY,
|
|
|
178 ngx_conf_set_bitmask_slot,
|
|
|
179 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
180 offsetof(ngx_http_gzip_conf_t, proxied),
|
|
|
181 &ngx_http_gzip_proxied_mask },
|
|
|
182
|
|
|
183 { ngx_string("gzip_min_length"),
|
|
|
184 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
185 ngx_conf_set_size_slot,
|
|
|
186 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
187 offsetof(ngx_http_gzip_conf_t, min_length),
|
|
|
188 NULL },
|
|
|
189
|
|
|
190 ngx_null_command
|
|
|
191 };
|
|
|
192
|
|
|
193
|
|
|
194 static ngx_http_module_t ngx_http_gzip_filter_module_ctx = {
|
|
|
195 ngx_http_gzip_pre_conf, /* pre conf */
|
|
|
196
|
|
|
197 NULL, /* create main configuration */
|
|
|
198 NULL, /* init main configuration */
|
|
|
199
|
|
|
200 NULL, /* create server configuration */
|
|
|
201 NULL, /* merge server configuration */
|
|
|
202
|
|
|
203 ngx_http_gzip_create_conf, /* create location configuration */
|
|
|
204 ngx_http_gzip_merge_conf, /* merge location configuration */
|
|
|
205 };
|
|
|
206
|
|
|
207
|
|
|
208 ngx_module_t ngx_http_gzip_filter_module = {
|
|
|
209 NGX_MODULE,
|
|
|
210 &ngx_http_gzip_filter_module_ctx, /* module context */
|
|
|
211 ngx_http_gzip_filter_commands, /* module directives */
|
|
|
212 NGX_HTTP_MODULE, /* module type */
|
|
|
213 ngx_http_gzip_filter_init, /* init module */
|
|
|
214 NULL /* init child */
|
|
|
215 };
|
|
|
216
|
|
|
217
|
|
|
218 static ngx_http_log_op_name_t ngx_http_gzip_log_fmt_ops[] = {
|
|
|
219 { ngx_string("gzip_ratio"), NGX_INT32_LEN + 3, ngx_http_gzip_log_ratio },
|
|
|
220 { ngx_null_string, 0, NULL }
|
|
|
221 };
|
|
|
222
|
|
|
223
|
|
|
224
|
|
|
225 static u_char gzheader[10] = { 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 };
|
|
|
226
|
|
|
227 #if (HAVE_LITTLE_ENDIAN)
|
|
|
228
|
|
|
229 struct gztrailer {
|
|
|
230 uint32_t crc32;
|
|
|
231 uint32_t zlen;
|
|
|
232 };
|
|
|
233
|
|
|
234 #else /* HAVE_BIG_ENDIAN */
|
|
|
235
|
|
|
236 struct gztrailer {
|
|
|
237 u_char crc32[4];
|
|
|
238 u_char zlen[4];
|
|
|
239 };
|
|
|
240
|
|
|
241 #endif
|
|
|
242
|
|
|
243
|
|
|
244 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
|
|
|
245 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
|
|
|
246
|
|
|
247
|
|
|
248 static ngx_int_t ngx_http_gzip_header_filter(ngx_http_request_t *r)
|
|
|
249 {
|
|
|
250 ngx_http_gzip_ctx_t *ctx;
|
|
|
251 ngx_http_gzip_conf_t *conf;
|
|
|
252
|
|
|
253 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
254
|
|
|
255 if (!conf->enable
|
|
|
256 || r->headers_out.status != NGX_HTTP_OK
|
|
|
257 || r->header_only
|
|
|
258 || r->http_version < conf->http_version
|
|
|
259 || (r->headers_out.content_encoding
|
|
|
260 && r->headers_out.content_encoding->value.len)
|
|
|
261 || r->headers_in.accept_encoding == NULL
|
|
|
262 || (r->headers_out.content_length_n != -1
|
|
|
263 && r->headers_out.content_length_n < conf->min_length)
|
|
|
264 || ngx_strstr(r->headers_in.accept_encoding->value.data, "gzip") == NULL
|
|
|
265 )
|
|
|
266 {
|
|
|
267 return ngx_http_next_header_filter(r);
|
|
|
268 }
|
|
|
269
|
|
|
270 /* TODO: "text/html" -> custom types */
|
|
|
271 if (r->headers_out.content_type
|
|
|
272 && ngx_strncasecmp(r->headers_out.content_type->value.data,
|
|
|
273 "text/html", 9) != 0)
|
|
|
274 {
|
|
|
275 return ngx_http_next_header_filter(r);
|
|
|
276 }
|
|
|
277
|
|
|
278
|
|
|
279 if (r->headers_in.via) {
|
|
|
280 if (conf->proxied & NGX_HTTP_GZIP_PROXIED_OFF) {
|
|
|
281 return ngx_http_next_header_filter(r);
|
|
|
282 }
|
|
|
283
|
|
|
284 if (!(conf->proxied & NGX_HTTP_GZIP_PROXIED_ANY)
|
|
|
285 && ngx_http_gzip_proxied(r, conf) == NGX_DECLINED)
|
|
|
286 {
|
|
|
287 return ngx_http_next_header_filter(r);
|
|
|
288 }
|
|
|
289 }
|
|
|
290
|
|
|
291
|
|
|
292 /*
|
|
|
293 * if the URL (without the "http://" prefix) is longer than 253 bytes
|
|
|
294 * then MSIE 4.x can not handle the compressed stream - it waits too long,
|
|
|
295 * hangs up or crashes
|
|
|
296 */
|
|
|
297
|
|
|
298 if (r->headers_in.msie4 && r->unparsed_uri.len > 200) {
|
|
|
299 return ngx_http_next_header_filter(r);
|
|
|
300 }
|
|
|
301
|
|
|
302
|
|
|
303 ngx_http_create_ctx(r, ctx, ngx_http_gzip_filter_module,
|
|
|
304 sizeof(ngx_http_gzip_ctx_t), NGX_ERROR);
|
|
|
305 ctx->request = r;
|
|
|
306
|
|
|
307 r->headers_out.content_encoding = ngx_list_push(&r->headers_out.headers);
|
|
|
308 if (r->headers_out.content_encoding == NULL) {
|
|
|
309 return NGX_ERROR;
|
|
|
310 }
|
|
|
311
|
|
|
312 r->headers_out.content_encoding->key.len = sizeof("Content-Encoding") - 1;
|
|
|
313 r->headers_out.content_encoding->key.data = (u_char *) "Content-Encoding";
|
|
|
314 r->headers_out.content_encoding->value.len = sizeof("gzip") - 1;
|
|
|
315 r->headers_out.content_encoding->value.data = (u_char *) "gzip";
|
|
|
316
|
|
|
317 ctx->length = r->headers_out.content_length_n;
|
|
|
318 r->headers_out.content_length_n = -1;
|
|
|
319 if (r->headers_out.content_length) {
|
|
|
320 r->headers_out.content_length->key.len = 0;
|
|
|
321 r->headers_out.content_length = NULL;
|
|
|
322 }
|
|
|
323 r->filter_need_in_memory = 1;
|
|
|
324
|
|
|
325 return ngx_http_next_header_filter(r);
|
|
|
326 }
|
|
|
327
|
|
|
328
|
|
|
329 static ngx_int_t ngx_http_gzip_proxied(ngx_http_request_t *r,
|
|
|
330 ngx_http_gzip_conf_t *conf)
|
|
|
331 {
|
|
|
332 time_t date, expires;
|
|
|
333
|
|
|
334 if (r->headers_in.authorization
|
|
|
335 && (conf->proxied & NGX_HTTP_GZIP_PROXIED_AUTH))
|
|
|
336 {
|
|
|
337 return NGX_OK;
|
|
|
338 }
|
|
|
339
|
|
|
340 if (r->headers_out.expires) {
|
|
|
341
|
|
|
342 if (!(conf->proxied & NGX_HTTP_GZIP_PROXIED_EXPIRED)) {
|
|
|
343 return NGX_DECLINED;
|
|
|
344 }
|
|
|
345
|
|
|
346 expires = ngx_http_parse_time(r->headers_out.expires->value.data,
|
|
|
347 r->headers_out.expires->value.len);
|
|
|
348 if (expires == NGX_ERROR) {
|
|
|
349 return NGX_DECLINED;
|
|
|
350 }
|
|
|
351
|
|
|
352 if (r->headers_out.date) {
|
|
|
353 date = ngx_http_parse_time(r->headers_out.date->value.data,
|
|
|
354 r->headers_out.date->value.len);
|
|
|
355 if (date == NGX_ERROR) {
|
|
|
356 return NGX_DECLINED;
|
|
|
357 }
|
|
|
358
|
|
|
359 } else {
|
|
|
360 date = ngx_time();
|
|
|
361 }
|
|
|
362
|
|
|
363 if (expires < date) {
|
|
|
364 return NGX_OK;
|
|
|
365 }
|
|
|
366
|
|
|
367 return NGX_DECLINED;
|
|
|
368 }
|
|
|
369
|
|
|
370 if (r->headers_out.cache_control) {
|
|
|
371
|
|
|
372 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_CACHE)
|
|
|
373 && ngx_strstr(r->headers_out.cache_control->value.data, "no-cache"))
|
|
|
374 {
|
|
|
375 return NGX_OK;
|
|
|
376 }
|
|
|
377
|
|
|
378 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_STORE)
|
|
|
379 && ngx_strstr(r->headers_out.cache_control->value.data, "no-store"))
|
|
|
380 {
|
|
|
381 return NGX_OK;
|
|
|
382 }
|
|
|
383
|
|
|
384 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_PRIVATE)
|
|
|
385 && ngx_strstr(r->headers_out.cache_control->value.data, "private"))
|
|
|
386 {
|
|
|
387 return NGX_OK;
|
|
|
388 }
|
|
|
389
|
|
|
390 return NGX_DECLINED;
|
|
|
391 }
|
|
|
392
|
|
|
393 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_LM)
|
|
|
394 && r->headers_out.last_modified)
|
|
|
395 {
|
|
|
396 return NGX_DECLINED;
|
|
|
397 }
|
|
|
398
|
|
|
399 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_ETAG)
|
|
|
400 && r->headers_out.etag)
|
|
|
401 {
|
|
|
402 return NGX_DECLINED;
|
|
|
403 }
|
|
|
404
|
|
|
405 return NGX_OK;
|
|
|
406 }
|
|
|
407
|
|
|
408
|
|
|
409 static ngx_int_t ngx_http_gzip_body_filter(ngx_http_request_t *r,
|
|
|
410 ngx_chain_t *in)
|
|
|
411 {
|
|
|
412 int rc, wbits, memlevel, last;
|
|
|
413 struct gztrailer *trailer;
|
|
|
414 ngx_buf_t *b;
|
|
|
415 ngx_chain_t *cl;
|
|
|
416 ngx_http_gzip_ctx_t *ctx;
|
|
|
417 ngx_http_gzip_conf_t *conf;
|
|
|
418
|
|
|
419 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
420
|
|
|
421 if (ctx == NULL || ctx->done) {
|
|
|
422 return ngx_http_next_body_filter(r, in);
|
|
|
423 }
|
|
|
424
|
|
|
425 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
426
|
|
|
427 if (ctx->preallocated == NULL) {
|
|
|
428 wbits = conf->wbits;
|
|
|
429 memlevel = conf->memlevel;
|
|
|
430
|
|
|
431 if (ctx->length > 0) {
|
|
|
432
|
|
|
433 /* the actual zlib window size is smaller by 262 bytes */
|
|
|
434
|
|
|
435 while (ctx->length < ((1 << (wbits - 1)) - 262)) {
|
|
|
436 wbits--;
|
|
|
437 memlevel--;
|
|
|
438 }
|
|
|
439 }
|
|
|
440
|
|
|
441 /*
|
|
|
442 * We preallocate a memory for zlib in one buffer (200K-400K), this
|
|
|
443 * dicreases a number of malloc() and free() calls and also probably
|
|
|
444 * dicreases a number of syscalls (sbrk() or so).
|
|
|
445 * Besides we free this memory as soon as the gzipping will complete
|
|
|
446 * and do not wait while a whole response will be sent to a client.
|
|
|
447 *
|
|
|
448 * 8K is for zlib deflate_state, it takes
|
|
|
449 * * 5816 bytes on x86 and sparc64 (32-bit mode)
|
|
|
450 * * 5920 bytes on amd64 and sparc64
|
|
|
451 */
|
|
|
452
|
|
|
453 ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9));
|
|
|
454
|
|
|
455 if (!(ctx->preallocated = ngx_palloc(r->pool, ctx->allocated))) {
|
|
|
456 return NGX_ERROR;
|
|
|
457 }
|
|
|
458
|
|
|
459 ctx->free_mem = ctx->preallocated;
|
|
|
460
|
|
|
461 ctx->zstream.zalloc = ngx_http_gzip_filter_alloc;
|
|
|
462 ctx->zstream.zfree = ngx_http_gzip_filter_free;
|
|
|
463 ctx->zstream.opaque = ctx;
|
|
|
464
|
|
|
465 rc = deflateInit2(&ctx->zstream, conf->level, Z_DEFLATED,
|
|
|
466 -wbits, memlevel, Z_DEFAULT_STRATEGY);
|
|
|
467
|
|
|
468 if (rc != Z_OK) {
|
|
|
469 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
470 "deflateInit2() failed: %d", rc);
|
|
|
471 return ngx_http_gzip_error(ctx);
|
|
|
472 }
|
|
|
473
|
|
|
474 if (!(b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)))) {
|
|
|
475 return ngx_http_gzip_error(ctx);
|
|
|
476 }
|
|
|
477
|
|
|
478 b->memory = 1;
|
|
|
479 b->pos = gzheader;
|
|
|
480 b->last = b->pos + 10;
|
|
|
481
|
|
|
482 ngx_alloc_link_and_set_buf(cl, b, r->pool, ngx_http_gzip_error(ctx));
|
|
|
483 ctx->out = cl;
|
|
|
484 ctx->last_out = &cl->next;
|
|
|
485
|
|
|
486 ctx->crc32 = crc32(0L, Z_NULL, 0);
|
|
|
487 ctx->flush = Z_NO_FLUSH;
|
|
|
488 }
|
|
|
489
|
|
|
490 if (in) {
|
|
|
491 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) {
|
|
|
492 return ngx_http_gzip_error(ctx);
|
|
|
493 }
|
|
|
494 }
|
|
|
495
|
|
|
496 last = NGX_NONE;
|
|
|
497
|
|
|
498 for ( ;; ) {
|
|
|
499
|
|
|
500 for ( ;; ) {
|
|
|
501
|
|
|
502 /* does zlib need a new data ? */
|
|
|
503
|
|
|
504 if (ctx->zstream.avail_in == 0
|
|
|
505 && ctx->flush == Z_NO_FLUSH
|
|
|
506 && !ctx->redo)
|
|
|
507 {
|
|
|
508 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
509 "gzip in: " PTR_FMT, ctx->in);
|
|
|
510
|
|
|
511 if (ctx->in == NULL) {
|
|
|
512 break;
|
|
|
513 }
|
|
|
514
|
|
|
515 ctx->in_buf = ctx->in->buf;
|
|
|
516 ctx->in = ctx->in->next;
|
|
|
517
|
|
|
518 ctx->zstream.next_in = ctx->in_buf->pos;
|
|
|
519 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos;
|
|
|
520
|
|
|
521 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
522 "gzip in_buf:" PTR_FMT " ni:" PTR_FMT " ai:%d",
|
|
|
523 ctx->in_buf,
|
|
|
524 ctx->zstream.next_in, ctx->zstream.avail_in);
|
|
|
525
|
|
|
526 /* STUB */
|
|
|
527 if (ctx->in_buf->last < ctx->in_buf->pos) {
|
|
|
528 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
529 "zstream.avail_in is huge");
|
|
|
530 ctx->done = 1;
|
|
|
531 return NGX_ERROR;
|
|
|
532 }
|
|
|
533 /**/
|
|
|
534
|
|
|
535 if (ctx->in_buf->last_buf) {
|
|
|
536 ctx->flush = Z_FINISH;
|
|
|
537
|
|
|
538 } else if (ctx->in_buf->flush) {
|
|
|
539 ctx->flush = Z_SYNC_FLUSH;
|
|
|
540 }
|
|
|
541
|
|
|
542 if (ctx->zstream.avail_in == 0) {
|
|
|
543 if (ctx->flush == Z_NO_FLUSH) {
|
|
|
544 continue;
|
|
|
545 }
|
|
|
546
|
|
|
547 } else {
|
|
|
548 ctx->crc32 = crc32(ctx->crc32, ctx->zstream.next_in,
|
|
|
549 ctx->zstream.avail_in);
|
|
|
550 }
|
|
|
551 }
|
|
|
552
|
|
|
553
|
|
|
554 /* is there a space for the gzipped data ? */
|
|
|
555
|
|
|
556 if (ctx->zstream.avail_out == 0) {
|
|
|
557
|
|
|
558 if (ctx->free) {
|
|
|
559 ctx->out_buf = ctx->free->buf;
|
|
|
560 ctx->free = ctx->free->next;
|
|
|
561
|
|
|
562 } else if (ctx->bufs < conf->bufs.num) {
|
|
|
563 ctx->out_buf = ngx_create_temp_buf(r->pool,
|
|
|
564 conf->bufs.size);
|
|
|
565 if (ctx->out_buf == NULL) {
|
|
|
566 return ngx_http_gzip_error(ctx);
|
|
|
567 }
|
|
|
568
|
|
|
569 ctx->out_buf->tag = (ngx_buf_tag_t)
|
|
|
570 &ngx_http_gzip_filter_module;
|
|
|
571 ctx->out_buf->recycled = 1;
|
|
|
572 ctx->bufs++;
|
|
|
573
|
|
|
574 } else {
|
|
|
575 #if 0
|
|
|
576 ctx->blocked = 1;
|
|
|
577 #endif
|
|
|
578 break;
|
|
|
579 }
|
|
|
580
|
|
|
581 #if 0
|
|
|
582 ctx->blocked = 0;
|
|
|
583 #endif
|
|
|
584 ctx->zstream.next_out = ctx->out_buf->pos;
|
|
|
585 ctx->zstream.avail_out = conf->bufs.size;
|
|
|
586 }
|
|
|
587
|
|
|
588 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
589 "deflate in: ni:%X no:%X ai:%d ao:%d fl:%d redo:%d",
|
|
|
590 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
591 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
592 ctx->flush, ctx->redo);
|
|
|
593
|
|
|
594 rc = deflate(&ctx->zstream, ctx->flush);
|
|
|
595
|
|
|
596 if (rc != Z_OK && rc != Z_STREAM_END) {
|
|
|
597 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
598 "deflate() failed: %d, %d", ctx->flush, rc);
|
|
|
599 return ngx_http_gzip_error(ctx);
|
|
|
600 }
|
|
|
601
|
|
|
602 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
603 "deflate out: ni:%X no:%X ai:%d ao:%d rc:%d",
|
|
|
604 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
605 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
606 rc);
|
|
|
607
|
|
|
608 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
609 "gzip in_buf:" PTR_FMT " pos:" PTR_FMT,
|
|
|
610 ctx->in_buf, ctx->in_buf->pos);
|
|
|
611
|
|
|
612
|
|
|
613 if (ctx->zstream.next_in) {
|
|
|
614 ctx->in_buf->pos = ctx->zstream.next_in;
|
|
|
615
|
|
|
616 if (ctx->zstream.avail_in == 0) {
|
|
|
617 ctx->zstream.next_in = NULL;
|
|
|
618 }
|
|
|
619 }
|
|
|
620
|
|
|
621 ctx->out_buf->last = ctx->zstream.next_out;
|
|
|
622
|
|
|
623 if (ctx->zstream.avail_out == 0) {
|
|
|
624
|
|
|
625 /* zlib wants to output some more gzipped data */
|
|
|
626
|
|
|
627 ngx_alloc_link_and_set_buf(cl, ctx->out_buf, r->pool,
|
|
|
628 ngx_http_gzip_error(ctx));
|
|
|
629 *ctx->last_out = cl;
|
|
|
630 ctx->last_out = &cl->next;
|
|
|
631
|
|
|
632 ctx->redo = 1;
|
|
|
633
|
|
|
634 continue;
|
|
|
635 }
|
|
|
636
|
|
|
637 ctx->redo = 0;
|
|
|
638
|
|
|
639 if (ctx->flush == Z_SYNC_FLUSH) {
|
|
|
640
|
|
|
641 ctx->out_buf->flush = 0;
|
|
|
642 ctx->flush = Z_NO_FLUSH;
|
|
|
643
|
|
|
644 ngx_alloc_link_and_set_buf(cl, ctx->out_buf, r->pool,
|
|
|
645 ngx_http_gzip_error(ctx));
|
|
|
646 *ctx->last_out = cl;
|
|
|
647 ctx->last_out = &cl->next;
|
|
|
648
|
|
|
649 #if 0
|
|
|
650 ctx->pass = 1;
|
|
|
651 #endif
|
|
|
652
|
|
|
653 break;
|
|
|
654 }
|
|
|
655
|
|
|
656 if (rc == Z_STREAM_END) {
|
|
|
657
|
|
|
658 ctx->zin = ctx->zstream.total_in;
|
|
|
659 ctx->zout = 10 + ctx->zstream.total_out + 8;
|
|
|
660
|
|
|
661 rc = deflateEnd(&ctx->zstream);
|
|
|
662
|
|
|
663 if (rc != Z_OK) {
|
|
|
664 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
665 "deflateEnd() failed: %d", rc);
|
|
|
666 return ngx_http_gzip_error(ctx);
|
|
|
667 }
|
|
|
668
|
|
|
669 ngx_pfree(r->pool, ctx->preallocated);
|
|
|
670
|
|
|
671 ngx_alloc_link_and_set_buf(cl, ctx->out_buf, r->pool,
|
|
|
672 ngx_http_gzip_error(ctx));
|
|
|
673 *ctx->last_out = cl;
|
|
|
674 ctx->last_out = &cl->next;
|
|
|
675
|
|
|
676 if (ctx->zstream.avail_out >= 8) {
|
|
|
677 trailer = (struct gztrailer *) ctx->out_buf->last;
|
|
|
678 ctx->out_buf->last += 8;
|
|
|
679 ctx->out_buf->last_buf = 1;
|
|
|
680
|
|
|
681 } else {
|
|
|
682 if (!(b = ngx_create_temp_buf(r->pool, 8))) {
|
|
|
683 return ngx_http_gzip_error(ctx);
|
|
|
684 }
|
|
|
685
|
|
|
686 b->last_buf = 1;
|
|
|
687
|
|
|
688 ngx_alloc_link_and_set_buf(cl, b, r->pool,
|
|
|
689 ngx_http_gzip_error(ctx));
|
|
|
690 *ctx->last_out = cl;
|
|
|
691 ctx->last_out = &cl->next;
|
|
|
692 trailer = (struct gztrailer *) b->pos;
|
|
|
693 b->last += 8;
|
|
|
694 }
|
|
|
695
|
|
|
696 #if (HAVE_LITTLE_ENDIAN)
|
|
|
697 trailer->crc32 = ctx->crc32;
|
|
|
698 trailer->zlen = ctx->zin;
|
|
|
699 #else
|
|
|
700 trailer->crc32[0] = ctx->crc32 & 0xff;
|
|
|
701 trailer->crc32[1] = (ctx->crc32 >> 8) & 0xff;
|
|
|
702 trailer->crc32[2] = (ctx->crc32 >> 16) & 0xff;
|
|
|
703 trailer->crc32[3] = (ctx->crc32 >> 24) & 0xff;
|
|
|
704
|
|
|
705 trailer->zlen[0] = ctx->zin & 0xff;
|
|
|
706 trailer->zlen[1] = (ctx->zin >> 8) & 0xff;
|
|
|
707 trailer->zlen[2] = (ctx->zin >> 16) & 0xff;
|
|
|
708 trailer->zlen[3] = (ctx->zin >> 24) & 0xff;
|
|
|
709 #endif
|
|
|
710
|
|
|
711 ctx->zstream.avail_in = 0;
|
|
|
712 ctx->zstream.avail_out = 0;
|
|
|
713
|
|
|
714 ctx->done = 1;
|
|
|
715 #if 0
|
|
|
716 ctx->pass = 1;
|
|
|
717 #endif
|
|
|
718
|
|
|
719 break;
|
|
|
720 }
|
|
|
721
|
|
|
722 if (conf->no_buffer && ctx->in == NULL) {
|
|
|
723 ngx_alloc_link_and_set_buf(cl, ctx->out_buf, r->pool,
|
|
|
724 ngx_http_gzip_error(ctx));
|
|
|
725 *ctx->last_out = cl;
|
|
|
726 ctx->last_out = &cl->next;
|
|
|
727
|
|
|
728 #if 0
|
|
|
729 ctx->pass = 1;
|
|
|
730 #endif
|
|
|
731
|
|
|
732 break;
|
|
|
733 }
|
|
|
734 }
|
|
|
735
|
|
|
736 #if 0
|
|
|
737
|
|
|
738 /* OLD CODE */
|
|
|
739
|
|
|
740 if (ctx->out) {
|
|
|
741 if (ctx->pass) {
|
|
|
742 ctx->pass = 0;
|
|
|
743
|
|
|
744 } else if (last == NGX_AGAIN) {
|
|
|
745 return last;
|
|
|
746 }
|
|
|
747
|
|
|
748 } else if (ctx->busy->buf && ngx_buf_size(ctx->busy->buf)) {
|
|
|
749 if (last != NGX_NONE) {
|
|
|
750 return last;
|
|
|
751 }
|
|
|
752
|
|
|
753 } else if (ctx->blocked) {
|
|
|
754 if (last != NGX_NONE) {
|
|
|
755 return last;
|
|
|
756 }
|
|
|
757
|
|
|
758 } else {
|
|
|
759 if (last == NGX_NONE) {
|
|
|
760 return NGX_OK;
|
|
|
761 }
|
|
|
762
|
|
|
763 return last;
|
|
|
764 }
|
|
|
765 #endif
|
|
|
766
|
|
|
767 /* NEW CODE */
|
|
|
768
|
|
|
769 if (last == NGX_AGAIN) {
|
|
|
770 return NGX_AGAIN;
|
|
|
771 }
|
|
|
772
|
|
|
773 if (ctx->out == NULL && ctx->busy == NULL) {
|
|
|
774 return NGX_OK;
|
|
|
775 }
|
|
|
776
|
|
|
777 /**/
|
|
|
778
|
|
|
779 last = ngx_http_next_body_filter(r, ctx->out);
|
|
|
780
|
|
|
781 /*
|
|
|
782 * we do not check NGX_AGAIN here because the downstream filters
|
|
|
783 * may free some buffers and zlib may compress some data into them
|
|
|
784 */
|
|
|
785
|
|
|
786 if (last == NGX_ERROR) {
|
|
|
787 return ngx_http_gzip_error(ctx);
|
|
|
788 }
|
|
|
789
|
|
|
790 ngx_chain_update_chains(&ctx->free, &ctx->busy, &ctx->out,
|
|
|
791 (ngx_buf_tag_t) &ngx_http_gzip_filter_module);
|
|
|
792 ctx->last_out = &ctx->out;
|
|
|
793
|
|
|
794 if (ctx->done) {
|
|
|
795 return last;
|
|
|
796 }
|
|
|
797 }
|
|
|
798 }
|
|
|
799
|
|
|
800
|
|
|
801 static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size)
|
|
|
802 {
|
|
|
803 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
804
|
|
|
805 void *p;
|
|
|
806 ngx_uint_t alloc;
|
|
|
807
|
|
|
808 alloc = items * size;
|
|
|
809 if (alloc % 512 != 0) {
|
|
|
810
|
|
|
811 /*
|
|
|
812 * the zlib deflate_state allocation, it takes about 6K, we allocate 8K
|
|
|
813 */
|
|
|
814
|
|
|
815 alloc = (alloc + ngx_pagesize - 1) & ~(ngx_pagesize - 1);
|
|
|
816 }
|
|
|
817
|
|
|
818 if (alloc <= ctx->allocated) {
|
|
|
819 p = ctx->free_mem;
|
|
|
820 ctx->free_mem += alloc;
|
|
|
821 ctx->allocated -= alloc;
|
|
|
822
|
|
|
823 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
824 "gzip alloc: n:%d s:%d a:%d p:" PTR_FMT,
|
|
|
825 items, size, alloc, p);
|
|
|
826
|
|
|
827 return p;
|
|
|
828 }
|
|
|
829
|
|
|
830 ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0,
|
|
|
831 "gzip filter failed to use preallocated memory: %d of %d",
|
|
|
832 items * size, ctx->allocated);
|
|
|
833
|
|
|
834 p = ngx_palloc(ctx->request->pool, items * size);
|
|
|
835
|
|
|
836 return p;
|
|
|
837 }
|
|
|
838
|
|
|
839
|
|
|
840 static void ngx_http_gzip_filter_free(void *opaque, void *address)
|
|
|
841 {
|
|
|
842 #if 0
|
|
|
843 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
844
|
|
|
845 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
846 "gzip free: %X", address);
|
|
|
847 #endif
|
|
|
848 }
|
|
|
849
|
|
|
850
|
|
|
851 static u_char *ngx_http_gzip_log_ratio(ngx_http_request_t *r, u_char *buf,
|
|
|
852 uintptr_t data)
|
|
|
853 {
|
|
|
854 ngx_uint_t zint, zfrac;
|
|
|
855 ngx_http_gzip_ctx_t *ctx;
|
|
|
856
|
|
|
857 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
858
|
|
|
859 if (ctx == NULL || ctx->zout == 0) {
|
|
|
860 *buf = '-';
|
|
|
861 return buf + 1;
|
|
|
862 }
|
|
|
863
|
|
|
864 #if 0
|
|
|
865 return buf + ngx_snprintf((char *) buf, NGX_INT32_LEN + 4, "%.2f",
|
|
|
866 (float) ctx->zin / ctx->zout);
|
|
|
867 #endif
|
|
|
868
|
|
|
869 /* we prefer do not use FPU */
|
|
|
870
|
|
|
871 zint = (ngx_uint_t) (ctx->zin / ctx->zout);
|
|
|
872 zfrac = (ngx_uint_t) ((ctx->zin * 100 / ctx->zout) % 100);
|
|
|
873
|
|
|
874 if ((ctx->zin * 1000 / ctx->zout) %10 > 4) {
|
|
|
875 if (++zfrac > 99) {
|
|
|
876 zint++;
|
|
|
877 zfrac = 0;
|
|
|
878 }
|
|
|
879 }
|
|
|
880
|
|
|
881 return buf + ngx_snprintf((char *) buf, NGX_INT32_LEN + 4,
|
|
|
882 "%" NGX_UINT_T_FMT ".%02" NGX_UINT_T_FMT,
|
|
|
883 zint, zfrac);
|
|
|
884 }
|
|
|
885
|
|
|
886
|
|
|
887 ngx_inline static int ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx)
|
|
|
888 {
|
|
|
889 deflateEnd(&ctx->zstream);
|
|
|
890
|
|
|
891 ngx_pfree(ctx->request->pool, ctx->preallocated);
|
|
|
892
|
|
|
893 ctx->zstream.avail_in = 0;
|
|
|
894 ctx->zstream.avail_out = 0;
|
|
|
895
|
|
|
896 ctx->done = 1;
|
|
|
897
|
|
|
898 return NGX_ERROR;
|
|
|
899 }
|
|
|
900
|
|
|
901
|
|
|
902 static ngx_int_t ngx_http_gzip_pre_conf(ngx_conf_t *cf)
|
|
|
903 {
|
|
|
904 ngx_http_log_op_name_t *op;
|
|
|
905
|
|
|
906 for (op = ngx_http_gzip_log_fmt_ops; op->name.len; op++) { /* void */ }
|
|
|
907 op->op = NULL;
|
|
|
908
|
|
|
909 op = ngx_http_log_fmt_ops;
|
|
|
910
|
|
|
911 for (op = ngx_http_log_fmt_ops; op->op; op++) {
|
|
|
912 if (op->name.len == 0) {
|
|
|
913 op = (ngx_http_log_op_name_t *) op->op;
|
|
|
914 }
|
|
|
915 }
|
|
|
916
|
|
|
917 op->op = (ngx_http_log_op_pt) ngx_http_gzip_log_fmt_ops;
|
|
|
918
|
|
|
919 return NGX_OK;
|
|
|
920 }
|
|
|
921
|
|
|
922
|
|
|
923 static ngx_int_t ngx_http_gzip_filter_init(ngx_cycle_t *cycle)
|
|
|
924 {
|
|
|
925 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
926 ngx_http_top_header_filter = ngx_http_gzip_header_filter;
|
|
|
927
|
|
|
928 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
929 ngx_http_top_body_filter = ngx_http_gzip_body_filter;
|
|
|
930
|
|
|
931 return NGX_OK;
|
|
|
932 }
|
|
|
933
|
|
|
934
|
|
|
935 static void *ngx_http_gzip_create_conf(ngx_conf_t *cf)
|
|
|
936 {
|
|
|
937 ngx_http_gzip_conf_t *conf;
|
|
|
938
|
|
|
939 if (!(conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gzip_conf_t)))) {
|
|
|
940 return NGX_CONF_ERROR;
|
|
|
941 }
|
|
|
942
|
|
|
943 /*
|
|
|
944
|
|
|
945 set by ngx_pcalloc():
|
|
|
946
|
|
|
947 conf->bufs.num = 0;
|
|
|
948 conf->proxied = 0;
|
|
|
949
|
|
|
950 */
|
|
|
951
|
|
|
952 conf->enable = NGX_CONF_UNSET;
|
|
|
953 conf->no_buffer = NGX_CONF_UNSET;
|
|
|
954
|
|
|
955 conf->http_version = NGX_CONF_UNSET_UINT;
|
|
|
956
|
|
|
957 conf->level = NGX_CONF_UNSET;
|
|
|
958 conf->wbits = (size_t) NGX_CONF_UNSET;
|
|
|
959 conf->memlevel = (size_t) NGX_CONF_UNSET;
|
|
|
960 conf->min_length = NGX_CONF_UNSET;
|
|
|
961
|
|
|
962 return conf;
|
|
|
963 }
|
|
|
964
|
|
|
965
|
|
|
966 static char *ngx_http_gzip_merge_conf(ngx_conf_t *cf,
|
|
|
967 void *parent, void *child)
|
|
|
968 {
|
|
|
969 ngx_http_gzip_conf_t *prev = parent;
|
|
|
970 ngx_http_gzip_conf_t *conf = child;
|
|
|
971
|
|
|
972 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
|
973
|
|
|
974 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 4, ngx_pagesize);
|
|
|
975
|
|
|
976 ngx_conf_merge_unsigned_value(conf->http_version, prev->http_version,
|
|
|
977 NGX_HTTP_VERSION_11);
|
|
|
978 ngx_conf_merge_bitmask_value(conf->proxied, prev->proxied,
|
|
|
979 (NGX_CONF_BITMASK_SET
|
|
|
980 |NGX_HTTP_GZIP_PROXIED_OFF));
|
|
|
981
|
|
|
982 ngx_conf_merge_value(conf->level, prev->level, 1);
|
|
|
983 ngx_conf_merge_size_value(conf->wbits, prev->wbits, MAX_WBITS);
|
|
|
984 ngx_conf_merge_size_value(conf->memlevel, prev->memlevel,
|
|
|
985 MAX_MEM_LEVEL - 1);
|
|
|
986 ngx_conf_merge_value(conf->min_length, prev->min_length, 0);
|
|
|
987 ngx_conf_merge_value(conf->no_buffer, prev->no_buffer, 0);
|
|
|
988
|
|
|
989 return NGX_CONF_OK;
|
|
|
990 }
|
|
|
991
|
|
|
992
|
|
|
993 static char *ngx_http_gzip_set_window(ngx_conf_t *cf, void *post, void *data)
|
|
|
994 {
|
|
|
995 int *np = data;
|
|
|
996
|
|
|
997 int wbits, wsize;
|
|
|
998
|
|
|
999 wbits = 15;
|
|
|
1000
|
|
|
1001 for (wsize = 32 * 1024; wsize > 256; wsize >>= 1) {
|
|
|
1002
|
|
|
1003 if (wsize == *np) {
|
|
|
1004 *np = wbits;
|
|
|
1005
|
|
|
1006 return NGX_CONF_OK;
|
|
|
1007 }
|
|
|
1008
|
|
|
1009 wbits--;
|
|
|
1010 }
|
|
|
1011
|
|
|
1012 return "must be 512, 1k, 2k, 4k, 8k, 16k, or 32k";
|
|
|
1013 }
|
|
|
1014
|
|
|
1015
|
|
|
1016 static char *ngx_http_gzip_set_hash(ngx_conf_t *cf, void *post, void *data)
|
|
|
1017 {
|
|
|
1018 int *np = data;
|
|
|
1019
|
|
|
1020 int memlevel, hsize;
|
|
|
1021
|
|
|
1022 memlevel = 9;
|
|
|
1023
|
|
|
1024 for (hsize = 128 * 1024; hsize > 256; hsize >>= 1) {
|
|
|
1025
|
|
|
1026 if (hsize == *np) {
|
|
|
1027 *np = memlevel;
|
|
|
1028
|
|
|
1029 return NGX_CONF_OK;
|
|
|
1030 }
|
|
|
1031
|
|
|
1032 memlevel--;
|
|
|
1033 }
|
|
|
1034
|
|
|
1035 return "must be 512, 1k, 2k, 4k, 8k, 16k, 32k, 64k, or 128k";
|
|
|
1036 }
|
