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