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comparison src/http/modules/ngx_http_not_modified_filter_module.c @ 50:72eb30262aac NGINX_0_1_25

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nginx 0.1.25 *) Bugfix: nginx did run on Linux parisc. *) Feature: nginx now does not start under FreeBSD if the sysctl kern.ipc.somaxconn value is too big. *) Bugfix: if a request was internally redirected by the ngx_http_index_module module to the ngx_http_proxy_module or ngx_http_fastcgi_module modules, then the index file was not closed after request completion. *) Feature: the "proxy_pass" can be used in location with regular expression. *) Feature: the ngx_http_rewrite_filter_module module supports the condition like "if ($HTTP_USER_AGENT ~ MSIE)". *) Bugfix: nginx started too slow if the large number of addresses and text values were used in the "geo" directive. *) Change: a variable name must be declared as "$name" in the "geo" directive. The previous variant without "$" is still supported, but will be removed soon. *) Feature: the "%{VARIABLE}v" logging parameter. *) Feature: the "set $name value" directive. *) Bugfix: gcc 4.0 compatibility. *) Feature: the --with-openssl-opt=OPTIONS autoconfiguration directive.
author Igor Sysoev <http://sysoev.ru>
date Sat, 19 Mar 2005 00:00:00 +0300
parents src/http/modules/ngx_http_not_modified_filter.c@46833bd150cb
children b55cbf18157e
comparison
equal deleted inserted replaced
49:93dabbc9efb9 50:72eb30262aac
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
12
13 static ngx_int_t ngx_http_not_modified_filter_init(ngx_cycle_t *cycle);
14
15
16 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = {
17 NULL, /* pre conf */
18
19 NULL, /* create main configuration */
20 NULL, /* init main configuration */
21
22 NULL, /* create server configuration */
23 NULL, /* merge server configuration */
24
25 NULL, /* create location configuration */
26 NULL /* merge location configuration */
27 };
28
29
30 ngx_module_t ngx_http_not_modified_filter_module = {
31 NGX_MODULE,
32 &ngx_http_not_modified_filter_module_ctx, /* module context */
33 NULL, /* module directives */
34 NGX_HTTP_MODULE, /* module type */
35 ngx_http_not_modified_filter_init, /* init module */
36 NULL /* init process */
37 };
38
39
40 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
41
42
43 static ngx_int_t ngx_http_not_modified_header_filter(ngx_http_request_t *r)
44 {
45 time_t ims;
46
47 if (r->headers_out.status != NGX_HTTP_OK
48 || r->headers_in.if_modified_since == NULL
49 || r->headers_out.last_modified_time == -1)
50 {
51 return ngx_http_next_header_filter(r);
52 }
53
54 ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data,
55 r->headers_in.if_modified_since->value.len);
56
57 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
58 "http ims:%d lm:%d", ims, r->headers_out.last_modified_time);
59
60 /*
61 * I think that the equality of the dates is correcter
62 */
63
64 if (ims != NGX_ERROR && ims == r->headers_out.last_modified_time) {
65 r->headers_out.status = NGX_HTTP_NOT_MODIFIED;
66 r->headers_out.content_type->key.len = 0;
67 r->headers_out.content_type = NULL;
68 r->headers_out.content_length_n = -1;
69 r->headers_out.content_length = NULL;
70 #if 0
71 r->headers_out.accept_ranges->key.len = 0;
72 #endif
73 }
74
75 return ngx_http_next_header_filter(r);
76 }
77
78
79 static ngx_int_t ngx_http_not_modified_filter_init(ngx_cycle_t *cycle)
80 {
81 ngx_http_next_header_filter = ngx_http_top_header_filter;
82 ngx_http_top_header_filter = ngx_http_not_modified_header_filter;
83
84 return NGX_OK;
85 }