|
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 #include <zlib.h>
|
|
|
12
|
|
|
13
|
|
|
14 typedef struct {
|
|
|
15 ngx_flag_t enable;
|
|
|
16 ngx_flag_t no_buffer;
|
|
342
|
17 ngx_flag_t vary;
|
|
50
|
18
|
|
76
|
19 ngx_array_t *types; /* array of ngx_str_t */
|
|
50
|
20
|
|
|
21 ngx_bufs_t bufs;
|
|
|
22
|
|
|
23 ngx_uint_t http_version;
|
|
|
24 ngx_uint_t proxied;
|
|
|
25
|
|
138
|
26 ngx_int_t level;
|
|
50
|
27 size_t wbits;
|
|
|
28 size_t memlevel;
|
|
|
29 ssize_t min_length;
|
|
|
30 } ngx_http_gzip_conf_t;
|
|
|
31
|
|
|
32
|
|
|
33 #define NGX_HTTP_GZIP_PROXIED_OFF 0x0002
|
|
|
34 #define NGX_HTTP_GZIP_PROXIED_EXPIRED 0x0004
|
|
|
35 #define NGX_HTTP_GZIP_PROXIED_NO_CACHE 0x0008
|
|
|
36 #define NGX_HTTP_GZIP_PROXIED_NO_STORE 0x0010
|
|
|
37 #define NGX_HTTP_GZIP_PROXIED_PRIVATE 0x0020
|
|
|
38 #define NGX_HTTP_GZIP_PROXIED_NO_LM 0x0040
|
|
|
39 #define NGX_HTTP_GZIP_PROXIED_NO_ETAG 0x0080
|
|
|
40 #define NGX_HTTP_GZIP_PROXIED_AUTH 0x0100
|
|
|
41 #define NGX_HTTP_GZIP_PROXIED_ANY 0x0200
|
|
|
42
|
|
|
43
|
|
|
44 typedef struct {
|
|
|
45 ngx_chain_t *in;
|
|
|
46 ngx_chain_t *free;
|
|
|
47 ngx_chain_t *busy;
|
|
|
48 ngx_chain_t *out;
|
|
|
49 ngx_chain_t **last_out;
|
|
|
50 ngx_buf_t *in_buf;
|
|
|
51 ngx_buf_t *out_buf;
|
|
|
52 ngx_int_t bufs;
|
|
|
53
|
|
|
54 off_t length;
|
|
|
55
|
|
|
56 void *preallocated;
|
|
|
57 char *free_mem;
|
|
|
58 ngx_uint_t allocated;
|
|
|
59
|
|
|
60 unsigned flush:4;
|
|
|
61 unsigned redo:1;
|
|
|
62 unsigned done:1;
|
|
|
63
|
|
|
64 size_t zin;
|
|
|
65 size_t zout;
|
|
|
66
|
|
|
67 uint32_t crc32;
|
|
|
68 z_stream zstream;
|
|
|
69 ngx_http_request_t *request;
|
|
|
70 } ngx_http_gzip_ctx_t;
|
|
|
71
|
|
|
72
|
|
|
73 static ngx_int_t ngx_http_gzip_proxied(ngx_http_request_t *r,
|
|
|
74 ngx_http_gzip_conf_t *conf);
|
|
|
75 static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items,
|
|
|
76 u_int size);
|
|
|
77 static void ngx_http_gzip_filter_free(void *opaque, void *address);
|
|
|
78 static void ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx);
|
|
|
79
|
|
122
|
80 static ngx_int_t ngx_http_gzip_add_variables(ngx_conf_t *cf);
|
|
|
81 static ngx_int_t ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
|
|
|
82 ngx_http_variable_value_t *v, uintptr_t data);
|
|
50
|
83
|
|
230
|
84 static ngx_int_t ngx_http_gzip_filter_init(ngx_conf_t *cf);
|
|
50
|
85 static void *ngx_http_gzip_create_conf(ngx_conf_t *cf);
|
|
|
86 static char *ngx_http_gzip_merge_conf(ngx_conf_t *cf,
|
|
|
87 void *parent, void *child);
|
|
76
|
88 static char *ngx_http_gzip_types(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
50
|
89 void *conf);
|
|
76
|
90 static char *ngx_http_gzip_window(ngx_conf_t *cf, void *post, void *data);
|
|
|
91 static char *ngx_http_gzip_hash(ngx_conf_t *cf, void *post, void *data);
|
|
50
|
92
|
|
|
93
|
|
|
94 static ngx_conf_num_bounds_t ngx_http_gzip_comp_level_bounds = {
|
|
|
95 ngx_conf_check_num_bounds, 1, 9
|
|
|
96 };
|
|
|
97
|
|
76
|
98 static ngx_conf_post_handler_pt ngx_http_gzip_window_p = ngx_http_gzip_window;
|
|
|
99 static ngx_conf_post_handler_pt ngx_http_gzip_hash_p = ngx_http_gzip_hash;
|
|
50
|
100
|
|
|
101
|
|
|
102 static ngx_conf_enum_t ngx_http_gzip_http_version[] = {
|
|
|
103 { ngx_string("1.0"), NGX_HTTP_VERSION_10 },
|
|
|
104 { ngx_string("1.1"), NGX_HTTP_VERSION_11 },
|
|
|
105 { ngx_null_string, 0 }
|
|
|
106 };
|
|
|
107
|
|
|
108
|
|
|
109 static ngx_conf_bitmask_t ngx_http_gzip_proxied_mask[] = {
|
|
|
110 { ngx_string("off"), NGX_HTTP_GZIP_PROXIED_OFF },
|
|
|
111 { ngx_string("expired"), NGX_HTTP_GZIP_PROXIED_EXPIRED },
|
|
|
112 { ngx_string("no-cache"), NGX_HTTP_GZIP_PROXIED_NO_CACHE },
|
|
|
113 { ngx_string("no-store"), NGX_HTTP_GZIP_PROXIED_NO_STORE },
|
|
|
114 { ngx_string("private"), NGX_HTTP_GZIP_PROXIED_PRIVATE },
|
|
|
115 { ngx_string("no_last_modified"), NGX_HTTP_GZIP_PROXIED_NO_LM },
|
|
|
116 { ngx_string("no_etag"), NGX_HTTP_GZIP_PROXIED_NO_ETAG },
|
|
|
117 { ngx_string("auth"), NGX_HTTP_GZIP_PROXIED_AUTH },
|
|
|
118 { ngx_string("any"), NGX_HTTP_GZIP_PROXIED_ANY },
|
|
|
119 { ngx_null_string, 0 }
|
|
|
120 };
|
|
|
121
|
|
|
122
|
|
|
123 static ngx_command_t ngx_http_gzip_filter_commands[] = {
|
|
|
124
|
|
|
125 { ngx_string("gzip"),
|
|
|
126 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
|
|
|
127 |NGX_CONF_FLAG,
|
|
|
128 ngx_conf_set_flag_slot,
|
|
|
129 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
130 offsetof(ngx_http_gzip_conf_t, enable),
|
|
|
131 NULL },
|
|
|
132
|
|
|
133 { ngx_string("gzip_buffers"),
|
|
|
134 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
|
|
|
135 ngx_conf_set_bufs_slot,
|
|
|
136 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
137 offsetof(ngx_http_gzip_conf_t, bufs),
|
|
|
138 NULL },
|
|
|
139
|
|
|
140 { ngx_string("gzip_types"),
|
|
|
141 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
|
|
76
|
142 ngx_http_gzip_types,
|
|
50
|
143 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
144 0,
|
|
|
145 NULL },
|
|
|
146
|
|
|
147 { ngx_string("gzip_comp_level"),
|
|
|
148 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
149 ngx_conf_set_num_slot,
|
|
|
150 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
151 offsetof(ngx_http_gzip_conf_t, level),
|
|
|
152 &ngx_http_gzip_comp_level_bounds },
|
|
|
153
|
|
|
154 { ngx_string("gzip_window"),
|
|
|
155 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
156 ngx_conf_set_size_slot,
|
|
|
157 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
158 offsetof(ngx_http_gzip_conf_t, wbits),
|
|
76
|
159 &ngx_http_gzip_window_p },
|
|
50
|
160
|
|
|
161 { ngx_string("gzip_hash"),
|
|
|
162 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
163 ngx_conf_set_size_slot,
|
|
|
164 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
165 offsetof(ngx_http_gzip_conf_t, memlevel),
|
|
76
|
166 &ngx_http_gzip_hash_p },
|
|
50
|
167
|
|
|
168 { ngx_string("gzip_no_buffer"),
|
|
|
169 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
|
|
|
170 ngx_conf_set_flag_slot,
|
|
|
171 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
172 offsetof(ngx_http_gzip_conf_t, no_buffer),
|
|
|
173 NULL },
|
|
|
174
|
|
|
175 { ngx_string("gzip_http_version"),
|
|
78
|
176 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
50
|
177 ngx_conf_set_enum_slot,
|
|
|
178 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
179 offsetof(ngx_http_gzip_conf_t, http_version),
|
|
|
180 &ngx_http_gzip_http_version },
|
|
|
181
|
|
|
182 { ngx_string("gzip_proxied"),
|
|
96
|
183 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
|
|
50
|
184 ngx_conf_set_bitmask_slot,
|
|
|
185 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
186 offsetof(ngx_http_gzip_conf_t, proxied),
|
|
|
187 &ngx_http_gzip_proxied_mask },
|
|
|
188
|
|
|
189 { ngx_string("gzip_min_length"),
|
|
|
190 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
|
|
|
191 ngx_conf_set_size_slot,
|
|
|
192 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
193 offsetof(ngx_http_gzip_conf_t, min_length),
|
|
|
194 NULL },
|
|
|
195
|
|
342
|
196 { ngx_string("gzip_vary"),
|
|
|
197 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
|
|
|
198 ngx_conf_set_flag_slot,
|
|
|
199 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
200 offsetof(ngx_http_gzip_conf_t, vary),
|
|
|
201 NULL },
|
|
|
202
|
|
50
|
203 ngx_null_command
|
|
|
204 };
|
|
|
205
|
|
|
206
|
|
|
207 static ngx_http_module_t ngx_http_gzip_filter_module_ctx = {
|
|
122
|
208 ngx_http_gzip_add_variables, /* preconfiguration */
|
|
230
|
209 ngx_http_gzip_filter_init, /* postconfiguration */
|
|
50
|
210
|
|
|
211 NULL, /* create main configuration */
|
|
|
212 NULL, /* init main configuration */
|
|
|
213
|
|
|
214 NULL, /* create server configuration */
|
|
|
215 NULL, /* merge server configuration */
|
|
|
216
|
|
|
217 ngx_http_gzip_create_conf, /* create location configuration */
|
|
|
218 ngx_http_gzip_merge_conf /* merge location configuration */
|
|
|
219 };
|
|
|
220
|
|
|
221
|
|
|
222 ngx_module_t ngx_http_gzip_filter_module = {
|
|
58
|
223 NGX_MODULE_V1,
|
|
50
|
224 &ngx_http_gzip_filter_module_ctx, /* module context */
|
|
|
225 ngx_http_gzip_filter_commands, /* module directives */
|
|
|
226 NGX_HTTP_MODULE, /* module type */
|
|
90
|
227 NULL, /* init master */
|
|
230
|
228 NULL, /* init module */
|
|
90
|
229 NULL, /* init process */
|
|
|
230 NULL, /* init thread */
|
|
|
231 NULL, /* exit thread */
|
|
|
232 NULL, /* exit process */
|
|
|
233 NULL, /* exit master */
|
|
|
234 NGX_MODULE_V1_PADDING
|
|
50
|
235 };
|
|
|
236
|
|
|
237
|
|
|
238 static u_char gzheader[10] = { 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 };
|
|
|
239
|
|
|
240 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
|
|
|
241
|
|
|
242 struct gztrailer {
|
|
|
243 uint32_t crc32;
|
|
|
244 uint32_t zlen;
|
|
|
245 };
|
|
|
246
|
|
|
247 #else /* NGX_HAVE_BIG_ENDIAN || !NGX_HAVE_NONALIGNED */
|
|
|
248
|
|
|
249 struct gztrailer {
|
|
|
250 u_char crc32[4];
|
|
|
251 u_char zlen[4];
|
|
|
252 };
|
|
|
253
|
|
|
254 #endif
|
|
|
255
|
|
|
256
|
|
122
|
257 static ngx_str_t ngx_http_gzip_ratio = ngx_string("gzip_ratio");
|
|
58
|
258 static ngx_str_t ngx_http_gzip_no_cache = ngx_string("no-cache");
|
|
|
259 static ngx_str_t ngx_http_gzip_no_store = ngx_string("no-store");
|
|
|
260 static ngx_str_t ngx_http_gzip_private = ngx_string("private");
|
|
|
261
|
|
|
262
|
|
50
|
263 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
|
|
|
264 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
|
|
|
265
|
|
|
266
|
|
|
267 static ngx_int_t
|
|
|
268 ngx_http_gzip_header_filter(ngx_http_request_t *r)
|
|
|
269 {
|
|
76
|
270 ngx_str_t *type;
|
|
|
271 ngx_uint_t i;
|
|
342
|
272 ngx_table_elt_t *header;
|
|
50
|
273 ngx_http_gzip_ctx_t *ctx;
|
|
|
274 ngx_http_gzip_conf_t *conf;
|
|
|
275
|
|
|
276 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
277
|
|
|
278 if (!conf->enable
|
|
|
279 || (r->headers_out.status != NGX_HTTP_OK
|
|
|
280 && r->headers_out.status != NGX_HTTP_FORBIDDEN
|
|
|
281 && r->headers_out.status != NGX_HTTP_NOT_FOUND)
|
|
|
282 || r->header_only
|
|
146
|
283 || r != r->main
|
|
50
|
284 || r->http_version < conf->http_version
|
|
58
|
285 || r->headers_out.content_type.len == 0
|
|
50
|
286 || (r->headers_out.content_encoding
|
|
|
287 && r->headers_out.content_encoding->value.len)
|
|
|
288 || r->headers_in.accept_encoding == NULL
|
|
|
289 || (r->headers_out.content_length_n != -1
|
|
|
290 && r->headers_out.content_length_n < conf->min_length)
|
|
340
|
291 || ngx_strcasestrn(r->headers_in.accept_encoding->value.data,
|
|
|
292 "gzip", 4 - 1)
|
|
|
293 == NULL
|
|
50
|
294 )
|
|
|
295 {
|
|
|
296 return ngx_http_next_header_filter(r);
|
|
|
297 }
|
|
|
298
|
|
|
299
|
|
|
300 type = conf->types->elts;
|
|
|
301 for (i = 0; i < conf->types->nelts; i++) {
|
|
76
|
302 if (r->headers_out.content_type.len >= type[i].len
|
|
126
|
303 && ngx_strncasecmp(r->headers_out.content_type.data,
|
|
76
|
304 type[i].data, type[i].len) == 0)
|
|
50
|
305 {
|
|
76
|
306 goto found;
|
|
50
|
307 }
|
|
|
308 }
|
|
|
309
|
|
76
|
310 return ngx_http_next_header_filter(r);
|
|
50
|
311
|
|
|
312
|
|
76
|
313 found:
|
|
|
314
|
|
50
|
315 if (r->headers_in.via) {
|
|
|
316 if (conf->proxied & NGX_HTTP_GZIP_PROXIED_OFF) {
|
|
|
317 return ngx_http_next_header_filter(r);
|
|
|
318 }
|
|
|
319
|
|
|
320 if (!(conf->proxied & NGX_HTTP_GZIP_PROXIED_ANY)
|
|
|
321 && ngx_http_gzip_proxied(r, conf) == NGX_DECLINED)
|
|
|
322 {
|
|
|
323 return ngx_http_next_header_filter(r);
|
|
|
324 }
|
|
|
325 }
|
|
|
326
|
|
|
327
|
|
|
328 /*
|
|
|
329 * if the URL (without the "http://" prefix) is longer than 253 bytes
|
|
|
330 * then MSIE 4.x can not handle the compressed stream - it waits too long,
|
|
|
331 * hangs up or crashes
|
|
|
332 */
|
|
|
333
|
|
|
334 if (r->headers_in.msie4 && r->unparsed_uri.len > 200) {
|
|
|
335 return ngx_http_next_header_filter(r);
|
|
|
336 }
|
|
|
337
|
|
|
338 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gzip_ctx_t));
|
|
|
339 if (ctx == NULL) {
|
|
|
340 return NGX_ERROR;
|
|
|
341 }
|
|
|
342
|
|
|
343 ngx_http_set_ctx(r, ctx, ngx_http_gzip_filter_module);
|
|
|
344
|
|
|
345
|
|
|
346 ctx->request = r;
|
|
|
347
|
|
342
|
348 header = ngx_list_push(&r->headers_out.headers);
|
|
|
349 if (header == NULL) {
|
|
50
|
350 return NGX_ERROR;
|
|
|
351 }
|
|
|
352
|
|
342
|
353 header->hash = 1;
|
|
|
354 header->key.len = sizeof("Content-Encoding") - 1;
|
|
|
355 header->key.data = (u_char *) "Content-Encoding";
|
|
|
356 header->value.len = sizeof("gzip") - 1;
|
|
|
357 header->value.data = (u_char *) "gzip";
|
|
|
358
|
|
|
359 r->headers_out.content_encoding = header;
|
|
|
360
|
|
|
361 if (conf->vary) {
|
|
|
362 header = ngx_list_push(&r->headers_out.headers);
|
|
|
363 if (header == NULL) {
|
|
|
364 return NGX_ERROR;
|
|
|
365 }
|
|
|
366
|
|
|
367 header->hash = 1;
|
|
|
368 header->key.len = sizeof("Vary") - 1;
|
|
|
369 header->key.data = (u_char *) "Vary";
|
|
|
370 header->value.len = sizeof("Accept-Encoding") - 1;
|
|
|
371 header->value.data = (u_char *) "Accept-Encoding";
|
|
|
372 }
|
|
50
|
373
|
|
|
374 ctx->length = r->headers_out.content_length_n;
|
|
58
|
375
|
|
62
|
376 r->main_filter_need_in_memory = 1;
|
|
50
|
377
|
|
126
|
378 ngx_http_clear_content_length(r);
|
|
|
379 ngx_http_clear_accept_ranges(r);
|
|
|
380
|
|
50
|
381 return ngx_http_next_header_filter(r);
|
|
|
382 }
|
|
|
383
|
|
|
384
|
|
|
385 static ngx_int_t
|
|
|
386 ngx_http_gzip_proxied(ngx_http_request_t *r, ngx_http_gzip_conf_t *conf)
|
|
|
387 {
|
|
|
388 time_t date, expires;
|
|
|
389
|
|
|
390 if (r->headers_in.authorization
|
|
|
391 && (conf->proxied & NGX_HTTP_GZIP_PROXIED_AUTH))
|
|
|
392 {
|
|
|
393 return NGX_OK;
|
|
|
394 }
|
|
|
395
|
|
|
396 if (r->headers_out.expires) {
|
|
|
397
|
|
|
398 if (!(conf->proxied & NGX_HTTP_GZIP_PROXIED_EXPIRED)) {
|
|
|
399 return NGX_DECLINED;
|
|
|
400 }
|
|
|
401
|
|
|
402 expires = ngx_http_parse_time(r->headers_out.expires->value.data,
|
|
|
403 r->headers_out.expires->value.len);
|
|
|
404 if (expires == NGX_ERROR) {
|
|
|
405 return NGX_DECLINED;
|
|
|
406 }
|
|
|
407
|
|
|
408 if (r->headers_out.date) {
|
|
|
409 date = ngx_http_parse_time(r->headers_out.date->value.data,
|
|
|
410 r->headers_out.date->value.len);
|
|
|
411 if (date == NGX_ERROR) {
|
|
|
412 return NGX_DECLINED;
|
|
|
413 }
|
|
|
414
|
|
|
415 } else {
|
|
|
416 date = ngx_time();
|
|
|
417 }
|
|
|
418
|
|
|
419 if (expires < date) {
|
|
|
420 return NGX_OK;
|
|
|
421 }
|
|
|
422
|
|
|
423 return NGX_DECLINED;
|
|
|
424 }
|
|
|
425
|
|
58
|
426 if (r->headers_out.cache_control.elts) {
|
|
50
|
427
|
|
|
428 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_CACHE)
|
|
58
|
429 && ngx_http_parse_multi_header_lines(&r->headers_out.cache_control,
|
|
|
430 &ngx_http_gzip_no_cache, NULL) >= 0)
|
|
50
|
431 {
|
|
|
432 return NGX_OK;
|
|
|
433 }
|
|
|
434
|
|
|
435 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_STORE)
|
|
58
|
436 && ngx_http_parse_multi_header_lines(&r->headers_out.cache_control,
|
|
|
437 &ngx_http_gzip_no_store, NULL) >= 0)
|
|
50
|
438 {
|
|
|
439 return NGX_OK;
|
|
|
440 }
|
|
|
441
|
|
|
442 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_PRIVATE)
|
|
58
|
443 && ngx_http_parse_multi_header_lines(&r->headers_out.cache_control,
|
|
|
444 &ngx_http_gzip_private, NULL) >= 0)
|
|
50
|
445 {
|
|
|
446 return NGX_OK;
|
|
|
447 }
|
|
|
448
|
|
|
449 return NGX_DECLINED;
|
|
|
450 }
|
|
|
451
|
|
|
452 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_LM)
|
|
|
453 && r->headers_out.last_modified)
|
|
|
454 {
|
|
|
455 return NGX_DECLINED;
|
|
|
456 }
|
|
|
457
|
|
|
458 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_ETAG)
|
|
|
459 && r->headers_out.etag)
|
|
|
460 {
|
|
|
461 return NGX_DECLINED;
|
|
|
462 }
|
|
|
463
|
|
|
464 return NGX_OK;
|
|
|
465 }
|
|
|
466
|
|
|
467
|
|
|
468 static ngx_int_t
|
|
|
469 ngx_http_gzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
470 {
|
|
|
471 int rc, wbits, memlevel;
|
|
|
472 ngx_int_t last;
|
|
|
473 struct gztrailer *trailer;
|
|
|
474 ngx_buf_t *b;
|
|
|
475 ngx_chain_t *cl, out;
|
|
|
476 ngx_http_gzip_ctx_t *ctx;
|
|
|
477 ngx_http_gzip_conf_t *conf;
|
|
|
478
|
|
|
479 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
480
|
|
|
481 if (ctx == NULL || ctx->done) {
|
|
|
482 return ngx_http_next_body_filter(r, in);
|
|
|
483 }
|
|
|
484
|
|
|
485 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
486
|
|
|
487 if (ctx->preallocated == NULL) {
|
|
|
488 wbits = conf->wbits;
|
|
|
489 memlevel = conf->memlevel;
|
|
|
490
|
|
|
491 if (ctx->length > 0) {
|
|
|
492
|
|
|
493 /* the actual zlib window size is smaller by 262 bytes */
|
|
|
494
|
|
|
495 while (ctx->length < ((1 << (wbits - 1)) - 262)) {
|
|
|
496 wbits--;
|
|
|
497 memlevel--;
|
|
|
498 }
|
|
|
499 }
|
|
|
500
|
|
|
501 /*
|
|
|
502 * We preallocate a memory for zlib in one buffer (200K-400K), this
|
|
|
503 * decreases a number of malloc() and free() calls and also probably
|
|
|
504 * decreases a number of syscalls (sbrk() and so on).
|
|
|
505 * Besides we free this memory as soon as the gzipping will complete
|
|
|
506 * and do not wait while a whole response will be sent to a client.
|
|
|
507 *
|
|
|
508 * 8K is for zlib deflate_state, it takes
|
|
58
|
509 * *) 5816 bytes on i386 and sparc64 (32-bit mode)
|
|
|
510 * *) 5920 bytes on amd64 and sparc64
|
|
50
|
511 */
|
|
|
512
|
|
|
513 ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9));
|
|
|
514
|
|
|
515 ctx->preallocated = ngx_palloc(r->pool, ctx->allocated);
|
|
|
516 if (ctx->preallocated == NULL) {
|
|
|
517 return NGX_ERROR;
|
|
|
518 }
|
|
|
519
|
|
|
520 ctx->free_mem = ctx->preallocated;
|
|
|
521
|
|
|
522 ctx->zstream.zalloc = ngx_http_gzip_filter_alloc;
|
|
|
523 ctx->zstream.zfree = ngx_http_gzip_filter_free;
|
|
|
524 ctx->zstream.opaque = ctx;
|
|
|
525
|
|
138
|
526 rc = deflateInit2(&ctx->zstream, (int) conf->level, Z_DEFLATED,
|
|
50
|
527 -wbits, memlevel, Z_DEFAULT_STRATEGY);
|
|
|
528
|
|
|
529 if (rc != Z_OK) {
|
|
|
530 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
531 "deflateInit2() failed: %d", rc);
|
|
|
532 ngx_http_gzip_error(ctx);
|
|
|
533 return NGX_ERROR;
|
|
|
534 }
|
|
|
535
|
|
|
536 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
537 if (b == NULL) {
|
|
|
538 ngx_http_gzip_error(ctx);
|
|
|
539 return NGX_ERROR;
|
|
|
540 }
|
|
|
541
|
|
|
542 b->memory = 1;
|
|
|
543 b->pos = gzheader;
|
|
|
544 b->last = b->pos + 10;
|
|
|
545
|
|
|
546 out.buf = b;
|
|
|
547 out.next = NULL;
|
|
|
548
|
|
|
549 /*
|
|
|
550 * We pass the gzheader to the next filter now to avoid its linking
|
|
|
551 * to the ctx->busy chain. zlib does not usually output the compressed
|
|
|
552 * data in the initial iterations, so the gzheader that was linked
|
|
|
553 * to the ctx->busy chain would be flushed by ngx_http_write_filter().
|
|
|
554 */
|
|
|
555
|
|
|
556 if (ngx_http_next_body_filter(r, &out) == NGX_ERROR) {
|
|
|
557 ngx_http_gzip_error(ctx);
|
|
|
558 return NGX_ERROR;
|
|
|
559 }
|
|
|
560
|
|
146
|
561 r->connection->buffered |= NGX_HTTP_GZIP_BUFFERED;
|
|
|
562
|
|
50
|
563 ctx->last_out = &ctx->out;
|
|
|
564
|
|
|
565 ctx->crc32 = crc32(0L, Z_NULL, 0);
|
|
|
566 ctx->flush = Z_NO_FLUSH;
|
|
|
567 }
|
|
|
568
|
|
|
569 if (in) {
|
|
|
570 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) {
|
|
|
571 ngx_http_gzip_error(ctx);
|
|
|
572 return NGX_ERROR;
|
|
|
573 }
|
|
|
574 }
|
|
|
575
|
|
|
576 last = NGX_NONE;
|
|
|
577
|
|
|
578 for ( ;; ) {
|
|
|
579
|
|
|
580 for ( ;; ) {
|
|
|
581
|
|
|
582 /* does zlib need a new data ? */
|
|
|
583
|
|
|
584 if (ctx->zstream.avail_in == 0
|
|
|
585 && ctx->flush == Z_NO_FLUSH
|
|
|
586 && !ctx->redo)
|
|
|
587 {
|
|
|
588 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
589 "gzip in: %p", ctx->in);
|
|
|
590
|
|
|
591 if (ctx->in == NULL) {
|
|
|
592 break;
|
|
|
593 }
|
|
|
594
|
|
|
595 ctx->in_buf = ctx->in->buf;
|
|
|
596 ctx->in = ctx->in->next;
|
|
|
597
|
|
|
598 ctx->zstream.next_in = ctx->in_buf->pos;
|
|
|
599 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos;
|
|
|
600
|
|
|
601 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
602 "gzip in_buf:%p ni:%p ai:%ud",
|
|
|
603 ctx->in_buf,
|
|
|
604 ctx->zstream.next_in, ctx->zstream.avail_in);
|
|
|
605
|
|
|
606 /* STUB */
|
|
|
607 if (ctx->in_buf->last < ctx->in_buf->pos) {
|
|
|
608 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
609 "zstream.avail_in is huge");
|
|
|
610 ctx->done = 1;
|
|
|
611 return NGX_ERROR;
|
|
|
612 }
|
|
|
613 /**/
|
|
|
614
|
|
|
615 if (ctx->in_buf->last_buf) {
|
|
|
616 ctx->flush = Z_FINISH;
|
|
|
617
|
|
|
618 } else if (ctx->in_buf->flush) {
|
|
|
619 ctx->flush = Z_SYNC_FLUSH;
|
|
|
620 }
|
|
|
621
|
|
|
622 if (ctx->zstream.avail_in == 0) {
|
|
|
623 if (ctx->flush == Z_NO_FLUSH) {
|
|
|
624 continue;
|
|
|
625 }
|
|
|
626
|
|
|
627 } else {
|
|
|
628 ctx->crc32 = crc32(ctx->crc32, ctx->zstream.next_in,
|
|
|
629 ctx->zstream.avail_in);
|
|
|
630 }
|
|
|
631 }
|
|
|
632
|
|
|
633
|
|
|
634 /* is there a space for the gzipped data ? */
|
|
|
635
|
|
|
636 if (ctx->zstream.avail_out == 0) {
|
|
|
637
|
|
|
638 if (ctx->free) {
|
|
|
639 ctx->out_buf = ctx->free->buf;
|
|
|
640 ctx->free = ctx->free->next;
|
|
|
641
|
|
|
642 } else if (ctx->bufs < conf->bufs.num) {
|
|
|
643 ctx->out_buf = ngx_create_temp_buf(r->pool,
|
|
|
644 conf->bufs.size);
|
|
|
645 if (ctx->out_buf == NULL) {
|
|
|
646 ngx_http_gzip_error(ctx);
|
|
|
647 return NGX_ERROR;
|
|
|
648 }
|
|
|
649
|
|
|
650 ctx->out_buf->tag = (ngx_buf_tag_t)
|
|
|
651 &ngx_http_gzip_filter_module;
|
|
|
652 ctx->out_buf->recycled = 1;
|
|
|
653 ctx->bufs++;
|
|
|
654
|
|
|
655 } else {
|
|
|
656 break;
|
|
|
657 }
|
|
|
658
|
|
|
659 ctx->zstream.next_out = ctx->out_buf->pos;
|
|
|
660 ctx->zstream.avail_out = conf->bufs.size;
|
|
|
661 }
|
|
|
662
|
|
|
663 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
664 "deflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d",
|
|
|
665 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
666 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
667 ctx->flush, ctx->redo);
|
|
|
668
|
|
|
669 rc = deflate(&ctx->zstream, ctx->flush);
|
|
|
670
|
|
|
671 if (rc != Z_OK && rc != Z_STREAM_END) {
|
|
|
672 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
673 "deflate() failed: %d, %d", ctx->flush, rc);
|
|
|
674 ngx_http_gzip_error(ctx);
|
|
|
675 return NGX_ERROR;
|
|
|
676 }
|
|
|
677
|
|
|
678 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
679 "deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
|
|
|
680 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
681 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
682 rc);
|
|
|
683
|
|
|
684 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
685 "gzip in_buf:%p pos:%p",
|
|
|
686 ctx->in_buf, ctx->in_buf->pos);
|
|
|
687
|
|
|
688
|
|
|
689 if (ctx->zstream.next_in) {
|
|
|
690 ctx->in_buf->pos = ctx->zstream.next_in;
|
|
|
691
|
|
|
692 if (ctx->zstream.avail_in == 0) {
|
|
|
693 ctx->zstream.next_in = NULL;
|
|
|
694 }
|
|
|
695 }
|
|
|
696
|
|
|
697 ctx->out_buf->last = ctx->zstream.next_out;
|
|
|
698
|
|
|
699 if (ctx->zstream.avail_out == 0) {
|
|
|
700
|
|
|
701 /* zlib wants to output some more gzipped data */
|
|
|
702
|
|
|
703 cl = ngx_alloc_chain_link(r->pool);
|
|
|
704 if (cl == NULL) {
|
|
|
705 ngx_http_gzip_error(ctx);
|
|
|
706 return NGX_ERROR;
|
|
|
707 }
|
|
|
708
|
|
|
709 cl->buf = ctx->out_buf;
|
|
|
710 cl->next = NULL;
|
|
|
711 *ctx->last_out = cl;
|
|
|
712 ctx->last_out = &cl->next;
|
|
|
713
|
|
|
714 ctx->redo = 1;
|
|
|
715
|
|
|
716 continue;
|
|
|
717 }
|
|
|
718
|
|
|
719 ctx->redo = 0;
|
|
|
720
|
|
|
721 if (ctx->flush == Z_SYNC_FLUSH) {
|
|
|
722
|
|
58
|
723 ctx->zstream.avail_out = 0;
|
|
|
724 ctx->out_buf->flush = 1;
|
|
50
|
725 ctx->flush = Z_NO_FLUSH;
|
|
|
726
|
|
|
727 cl = ngx_alloc_chain_link(r->pool);
|
|
|
728 if (cl == NULL) {
|
|
|
729 ngx_http_gzip_error(ctx);
|
|
|
730 return NGX_ERROR;
|
|
|
731 }
|
|
|
732
|
|
|
733 cl->buf = ctx->out_buf;
|
|
|
734 cl->next = NULL;
|
|
|
735 *ctx->last_out = cl;
|
|
|
736 ctx->last_out = &cl->next;
|
|
|
737
|
|
|
738 break;
|
|
|
739 }
|
|
|
740
|
|
|
741 if (rc == Z_STREAM_END) {
|
|
|
742
|
|
|
743 ctx->zin = ctx->zstream.total_in;
|
|
|
744 ctx->zout = 10 + ctx->zstream.total_out + 8;
|
|
|
745
|
|
|
746 rc = deflateEnd(&ctx->zstream);
|
|
|
747
|
|
|
748 if (rc != Z_OK) {
|
|
|
749 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
750 "deflateEnd() failed: %d", rc);
|
|
|
751 ngx_http_gzip_error(ctx);
|
|
|
752 return NGX_ERROR;
|
|
|
753 }
|
|
|
754
|
|
|
755 ngx_pfree(r->pool, ctx->preallocated);
|
|
|
756
|
|
|
757 cl = ngx_alloc_chain_link(r->pool);
|
|
|
758 if (cl == NULL) {
|
|
|
759 ngx_http_gzip_error(ctx);
|
|
|
760 return NGX_ERROR;
|
|
|
761 }
|
|
|
762
|
|
|
763 cl->buf = ctx->out_buf;
|
|
|
764 cl->next = NULL;
|
|
|
765 *ctx->last_out = cl;
|
|
|
766 ctx->last_out = &cl->next;
|
|
|
767
|
|
|
768 if (ctx->zstream.avail_out >= 8) {
|
|
|
769 trailer = (struct gztrailer *) ctx->out_buf->last;
|
|
|
770 ctx->out_buf->last += 8;
|
|
|
771 ctx->out_buf->last_buf = 1;
|
|
|
772
|
|
|
773 } else {
|
|
|
774 b = ngx_create_temp_buf(r->pool, 8);
|
|
|
775 if (b == NULL) {
|
|
|
776 ngx_http_gzip_error(ctx);
|
|
|
777 return NGX_ERROR;
|
|
|
778 }
|
|
|
779
|
|
|
780 b->last_buf = 1;
|
|
|
781
|
|
|
782 cl = ngx_alloc_chain_link(r->pool);
|
|
|
783 if (cl == NULL) {
|
|
|
784 ngx_http_gzip_error(ctx);
|
|
|
785 return NGX_ERROR;
|
|
|
786 }
|
|
|
787
|
|
|
788 cl->buf = b;
|
|
|
789 cl->next = NULL;
|
|
|
790 *ctx->last_out = cl;
|
|
|
791 ctx->last_out = &cl->next;
|
|
|
792 trailer = (struct gztrailer *) b->pos;
|
|
|
793 b->last += 8;
|
|
|
794 }
|
|
|
795
|
|
|
796 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
|
|
|
797
|
|
|
798 trailer->crc32 = ctx->crc32;
|
|
|
799 trailer->zlen = ctx->zin;
|
|
|
800
|
|
|
801 #else
|
|
|
802 trailer->crc32[0] = (u_char) (ctx->crc32 & 0xff);
|
|
|
803 trailer->crc32[1] = (u_char) ((ctx->crc32 >> 8) & 0xff);
|
|
|
804 trailer->crc32[2] = (u_char) ((ctx->crc32 >> 16) & 0xff);
|
|
|
805 trailer->crc32[3] = (u_char) ((ctx->crc32 >> 24) & 0xff);
|
|
|
806
|
|
|
807 trailer->zlen[0] = (u_char) (ctx->zin & 0xff);
|
|
|
808 trailer->zlen[1] = (u_char) ((ctx->zin >> 8) & 0xff);
|
|
|
809 trailer->zlen[2] = (u_char) ((ctx->zin >> 16) & 0xff);
|
|
|
810 trailer->zlen[3] = (u_char) ((ctx->zin >> 24) & 0xff);
|
|
|
811 #endif
|
|
|
812
|
|
|
813 ctx->zstream.avail_in = 0;
|
|
|
814 ctx->zstream.avail_out = 0;
|
|
|
815
|
|
|
816 ctx->done = 1;
|
|
|
817
|
|
146
|
818 r->connection->buffered &= ~NGX_HTTP_GZIP_BUFFERED;
|
|
|
819
|
|
50
|
820 break;
|
|
|
821 }
|
|
|
822
|
|
|
823 if (conf->no_buffer && ctx->in == NULL) {
|
|
|
824
|
|
|
825 cl = ngx_alloc_chain_link(r->pool);
|
|
|
826 if (cl == NULL) {
|
|
|
827 ngx_http_gzip_error(ctx);
|
|
|
828 return NGX_ERROR;
|
|
|
829 }
|
|
|
830
|
|
|
831 cl->buf = ctx->out_buf;
|
|
|
832 cl->next = NULL;
|
|
|
833 *ctx->last_out = cl;
|
|
|
834 ctx->last_out = &cl->next;
|
|
|
835
|
|
|
836 break;
|
|
|
837 }
|
|
|
838 }
|
|
|
839
|
|
346
|
840 if (ctx->out == NULL) {
|
|
50
|
841
|
|
346
|
842 if (last == NGX_AGAIN) {
|
|
|
843 return NGX_AGAIN;
|
|
|
844 }
|
|
|
845
|
|
|
846 if (ctx->busy == NULL) {
|
|
|
847 return NGX_OK;
|
|
|
848 }
|
|
50
|
849 }
|
|
|
850
|
|
|
851 last = ngx_http_next_body_filter(r, ctx->out);
|
|
|
852
|
|
|
853 /*
|
|
|
854 * we do not check NGX_AGAIN here because the downstream filters
|
|
|
855 * may free some buffers and zlib may compress some data into them
|
|
|
856 */
|
|
|
857
|
|
|
858 if (last == NGX_ERROR) {
|
|
|
859 ngx_http_gzip_error(ctx);
|
|
|
860 return NGX_ERROR;
|
|
|
861 }
|
|
|
862
|
|
|
863 ngx_chain_update_chains(&ctx->free, &ctx->busy, &ctx->out,
|
|
|
864 (ngx_buf_tag_t) &ngx_http_gzip_filter_module);
|
|
|
865 ctx->last_out = &ctx->out;
|
|
|
866
|
|
|
867 if (ctx->done) {
|
|
|
868 return last;
|
|
|
869 }
|
|
|
870 }
|
|
|
871 }
|
|
|
872
|
|
|
873
|
|
|
874 static void *
|
|
|
875 ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size)
|
|
|
876 {
|
|
|
877 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
878
|
|
|
879 void *p;
|
|
|
880 ngx_uint_t alloc;
|
|
|
881
|
|
|
882 alloc = items * size;
|
|
|
883
|
|
|
884 if (alloc % 512 != 0) {
|
|
|
885
|
|
|
886 /*
|
|
|
887 * The zlib deflate_state allocation, it takes about 6K,
|
|
|
888 * we allocate 8K. Other allocations are divisible by 512.
|
|
|
889 */
|
|
|
890
|
|
|
891 alloc = (alloc + ngx_pagesize - 1) & ~(ngx_pagesize - 1);
|
|
|
892 }
|
|
|
893
|
|
|
894 if (alloc <= ctx->allocated) {
|
|
|
895 p = ctx->free_mem;
|
|
|
896 ctx->free_mem += alloc;
|
|
|
897 ctx->allocated -= alloc;
|
|
|
898
|
|
|
899 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
900 "gzip alloc: n:%ud s:%ud a:%ud p:%p",
|
|
|
901 items, size, alloc, p);
|
|
|
902
|
|
|
903 return p;
|
|
|
904 }
|
|
|
905
|
|
|
906 ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0,
|
|
|
907 "gzip filter failed to use preallocated memory: %ud of %ud",
|
|
|
908 items * size, ctx->allocated);
|
|
|
909
|
|
|
910 p = ngx_palloc(ctx->request->pool, items * size);
|
|
|
911
|
|
|
912 return p;
|
|
|
913 }
|
|
|
914
|
|
|
915
|
|
|
916 static void
|
|
|
917 ngx_http_gzip_filter_free(void *opaque, void *address)
|
|
|
918 {
|
|
|
919 #if 0
|
|
|
920 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
921
|
|
|
922 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
923 "gzip free: %p", address);
|
|
|
924 #endif
|
|
|
925 }
|
|
|
926
|
|
|
927
|
|
|
928 static void
|
|
|
929 ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx)
|
|
|
930 {
|
|
|
931 deflateEnd(&ctx->zstream);
|
|
|
932
|
|
|
933 if (ctx->preallocated) {
|
|
|
934 ngx_pfree(ctx->request->pool, ctx->preallocated);
|
|
|
935 }
|
|
|
936
|
|
|
937 ctx->zstream.avail_in = 0;
|
|
|
938 ctx->zstream.avail_out = 0;
|
|
|
939
|
|
|
940 ctx->done = 1;
|
|
|
941
|
|
|
942 return;
|
|
|
943 }
|
|
|
944
|
|
|
945
|
|
|
946 static ngx_int_t
|
|
122
|
947 ngx_http_gzip_add_variables(ngx_conf_t *cf)
|
|
50
|
948 {
|
|
260
|
949 ngx_http_variable_t *var;
|
|
50
|
950
|
|
132
|
951 var = ngx_http_add_variable(cf, &ngx_http_gzip_ratio, NGX_HTTP_VAR_NOHASH);
|
|
122
|
952 if (var == NULL) {
|
|
|
953 return NGX_ERROR;
|
|
|
954 }
|
|
|
955
|
|
186
|
956 var->get_handler = ngx_http_gzip_ratio_variable;
|
|
122
|
957
|
|
50
|
958 return NGX_OK;
|
|
|
959 }
|
|
|
960
|
|
|
961
|
|
|
962 static ngx_int_t
|
|
122
|
963 ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
|
|
|
964 ngx_http_variable_value_t *v, uintptr_t data)
|
|
|
965 {
|
|
|
966 ngx_uint_t zint, zfrac;
|
|
|
967 ngx_http_gzip_ctx_t *ctx;
|
|
|
968
|
|
126
|
969 v->valid = 1;
|
|
340
|
970 v->no_cacheable = 0;
|
|
122
|
971 v->not_found = 0;
|
|
|
972
|
|
|
973 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
974
|
|
|
975 if (ctx == NULL || ctx->zout == 0) {
|
|
|
976 v->not_found = 1;
|
|
|
977 return NGX_OK;
|
|
|
978 }
|
|
|
979
|
|
|
980 v->data = ngx_palloc(r->pool, NGX_INT32_LEN + 3);
|
|
|
981 if (v->data == NULL) {
|
|
|
982 return NGX_ERROR;
|
|
|
983 }
|
|
|
984
|
|
|
985 zint = (ngx_uint_t) (ctx->zin / ctx->zout);
|
|
|
986 zfrac = (ngx_uint_t) ((ctx->zin * 100 / ctx->zout) % 100);
|
|
|
987
|
|
|
988 if ((ctx->zin * 1000 / ctx->zout) % 10 > 4) {
|
|
|
989
|
|
|
990 /* the rounding, e.g., 2.125 to 2.13 */
|
|
|
991
|
|
|
992 zfrac++;
|
|
|
993
|
|
|
994 if (zfrac > 99) {
|
|
|
995 zint++;
|
|
|
996 zfrac = 0;
|
|
|
997 }
|
|
|
998 }
|
|
|
999
|
|
|
1000 v->len = ngx_sprintf(v->data, "%ui.%02ui", zint, zfrac) - v->data;
|
|
|
1001
|
|
|
1002 return NGX_OK;
|
|
|
1003 }
|
|
|
1004
|
|
|
1005
|
|
50
|
1006 static void *
|
|
|
1007 ngx_http_gzip_create_conf(ngx_conf_t *cf)
|
|
|
1008 {
|
|
|
1009 ngx_http_gzip_conf_t *conf;
|
|
|
1010
|
|
|
1011 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gzip_conf_t));
|
|
|
1012 if (conf == NULL) {
|
|
|
1013 return NGX_CONF_ERROR;
|
|
|
1014 }
|
|
|
1015
|
|
|
1016 /*
|
|
|
1017 * set by ngx_pcalloc():
|
|
|
1018 *
|
|
|
1019 * conf->bufs.num = 0;
|
|
|
1020 * conf->proxied = 0;
|
|
|
1021 * conf->types = NULL;
|
|
|
1022 */
|
|
|
1023
|
|
|
1024 conf->enable = NGX_CONF_UNSET;
|
|
|
1025 conf->no_buffer = NGX_CONF_UNSET;
|
|
342
|
1026 conf->vary = NGX_CONF_UNSET;
|
|
50
|
1027
|
|
|
1028 conf->http_version = NGX_CONF_UNSET_UINT;
|
|
|
1029
|
|
|
1030 conf->level = NGX_CONF_UNSET;
|
|
|
1031 conf->wbits = (size_t) NGX_CONF_UNSET;
|
|
|
1032 conf->memlevel = (size_t) NGX_CONF_UNSET;
|
|
|
1033 conf->min_length = NGX_CONF_UNSET;
|
|
|
1034
|
|
|
1035 return conf;
|
|
|
1036 }
|
|
|
1037
|
|
|
1038
|
|
|
1039 static char *
|
|
|
1040 ngx_http_gzip_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1041 {
|
|
|
1042 ngx_http_gzip_conf_t *prev = parent;
|
|
|
1043 ngx_http_gzip_conf_t *conf = child;
|
|
|
1044
|
|
76
|
1045 ngx_str_t *type;
|
|
50
|
1046
|
|
|
1047 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
|
1048
|
|
|
1049 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 4, ngx_pagesize);
|
|
|
1050
|
|
212
|
1051 ngx_conf_merge_uint_value(conf->http_version, prev->http_version,
|
|
50
|
1052 NGX_HTTP_VERSION_11);
|
|
|
1053 ngx_conf_merge_bitmask_value(conf->proxied, prev->proxied,
|
|
|
1054 (NGX_CONF_BITMASK_SET|NGX_HTTP_GZIP_PROXIED_OFF));
|
|
|
1055
|
|
|
1056 ngx_conf_merge_value(conf->level, prev->level, 1);
|
|
|
1057 ngx_conf_merge_size_value(conf->wbits, prev->wbits, MAX_WBITS);
|
|
|
1058 ngx_conf_merge_size_value(conf->memlevel, prev->memlevel,
|
|
|
1059 MAX_MEM_LEVEL - 1);
|
|
126
|
1060 ngx_conf_merge_value(conf->min_length, prev->min_length, 20);
|
|
50
|
1061 ngx_conf_merge_value(conf->no_buffer, prev->no_buffer, 0);
|
|
342
|
1062 ngx_conf_merge_value(conf->vary, prev->vary, 0);
|
|
50
|
1063
|
|
|
1064 if (conf->types == NULL) {
|
|
|
1065 if (prev->types == NULL) {
|
|
76
|
1066 conf->types = ngx_array_create(cf->pool, 1, sizeof(ngx_str_t));
|
|
50
|
1067 if (conf->types == NULL) {
|
|
|
1068 return NGX_CONF_ERROR;
|
|
|
1069 }
|
|
|
1070
|
|
|
1071 type = ngx_array_push(conf->types);
|
|
|
1072 if (type == NULL) {
|
|
|
1073 return NGX_CONF_ERROR;
|
|
|
1074 }
|
|
|
1075
|
|
76
|
1076 type->len = sizeof("text/html") - 1;
|
|
|
1077 type->data = (u_char *) "text/html";
|
|
50
|
1078
|
|
|
1079 } else {
|
|
|
1080 conf->types = prev->types;
|
|
|
1081 }
|
|
|
1082 }
|
|
|
1083
|
|
|
1084 return NGX_CONF_OK;
|
|
|
1085 }
|
|
|
1086
|
|
|
1087
|
|
230
|
1088 static ngx_int_t
|
|
|
1089 ngx_http_gzip_filter_init(ngx_conf_t *cf)
|
|
|
1090 {
|
|
|
1091 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1092 ngx_http_top_header_filter = ngx_http_gzip_header_filter;
|
|
|
1093
|
|
|
1094 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1095 ngx_http_top_body_filter = ngx_http_gzip_body_filter;
|
|
|
1096
|
|
|
1097 return NGX_OK;
|
|
|
1098 }
|
|
|
1099
|
|
|
1100
|
|
50
|
1101 static char *
|
|
76
|
1102 ngx_http_gzip_types(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
50
|
1103 {
|
|
|
1104 ngx_http_gzip_conf_t *gcf = conf;
|
|
|
1105
|
|
76
|
1106 ngx_str_t *value, *type;
|
|
|
1107 ngx_uint_t i;
|
|
50
|
1108
|
|
|
1109 if (gcf->types == NULL) {
|
|
76
|
1110 gcf->types = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t));
|
|
50
|
1111 if (gcf->types == NULL) {
|
|
|
1112 return NGX_CONF_ERROR;
|
|
|
1113 }
|
|
|
1114
|
|
|
1115 type = ngx_array_push(gcf->types);
|
|
|
1116 if (type == NULL) {
|
|
|
1117 return NGX_CONF_ERROR;
|
|
|
1118 }
|
|
|
1119
|
|
76
|
1120 type->len = sizeof("text/html") - 1;
|
|
|
1121 type->data = (u_char *) "text/html";
|
|
50
|
1122 }
|
|
|
1123
|
|
|
1124 value = cf->args->elts;
|
|
|
1125
|
|
|
1126 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
1127
|
|
|
1128 if (ngx_strcmp(value[i].data, "text/html") == 0) {
|
|
|
1129 continue;
|
|
|
1130 }
|
|
|
1131
|
|
|
1132 type = ngx_array_push(gcf->types);
|
|
|
1133 if (type == NULL) {
|
|
|
1134 return NGX_CONF_ERROR;
|
|
|
1135 }
|
|
|
1136
|
|
76
|
1137 type->len = value[i].len;
|
|
50
|
1138
|
|
76
|
1139 type->data = ngx_palloc(cf->pool, type->len + 1);
|
|
|
1140 if (type->data == NULL) {
|
|
50
|
1141 return NGX_CONF_ERROR;
|
|
|
1142 }
|
|
|
1143
|
|
76
|
1144 ngx_cpystrn(type->data, value[i].data, type->len + 1);
|
|
50
|
1145 }
|
|
|
1146
|
|
|
1147 return NGX_CONF_OK;
|
|
|
1148 }
|
|
|
1149
|
|
|
1150
|
|
|
1151 static char *
|
|
76
|
1152 ngx_http_gzip_window(ngx_conf_t *cf, void *post, void *data)
|
|
50
|
1153 {
|
|
|
1154 int *np = data;
|
|
|
1155
|
|
|
1156 int wbits, wsize;
|
|
|
1157
|
|
|
1158 wbits = 15;
|
|
|
1159
|
|
|
1160 for (wsize = 32 * 1024; wsize > 256; wsize >>= 1) {
|
|
|
1161
|
|
|
1162 if (wsize == *np) {
|
|
|
1163 *np = wbits;
|
|
|
1164
|
|
|
1165 return NGX_CONF_OK;
|
|
|
1166 }
|
|
|
1167
|
|
|
1168 wbits--;
|
|
|
1169 }
|
|
|
1170
|
|
|
1171 return "must be 512, 1k, 2k, 4k, 8k, 16k, or 32k";
|
|
|
1172 }
|
|
|
1173
|
|
|
1174
|
|
|
1175 static char *
|
|
76
|
1176 ngx_http_gzip_hash(ngx_conf_t *cf, void *post, void *data)
|
|
50
|
1177 {
|
|
|
1178 int *np = data;
|
|
|
1179
|
|
|
1180 int memlevel, hsize;
|
|
|
1181
|
|
|
1182 memlevel = 9;
|
|
|
1183
|
|
|
1184 for (hsize = 128 * 1024; hsize > 256; hsize >>= 1) {
|
|
|
1185
|
|
|
1186 if (hsize == *np) {
|
|
|
1187 *np = memlevel;
|
|
|
1188
|
|
|
1189 return NGX_CONF_OK;
|
|
|
1190 }
|
|
|
1191
|
|
|
1192 memlevel--;
|
|
|
1193 }
|
|
|
1194
|
|
|
1195 return "must be 512, 1k, 2k, 4k, 8k, 16k, 32k, 64k, or 128k";
|
|
|
1196 }
|
