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