Mercurial > hg > nginx
annotate src/http/modules/ngx_http_not_modified_filter_module.c @ 3593:a79d2ad7a2d8 stable-0.7
merge r3487, r3525:
rewrite fixes:
*) escape ampersand in argument while rewrite
*) autodetect redirect if URI is rewritten to a string starting with $scheme
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 07 Jun 2010 11:51:37 +0000 |
parents | b0fbe6ab9ebe |
children | e6e453203bae |
rev | line source |
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441
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_http.h> |
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10 |
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11 |
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12 |
681 | 13 static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf); |
135
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14 |
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15 |
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16 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = { |
509 | 17 NULL, /* preconfiguration */ |
681 | 18 ngx_http_not_modified_filter_init, /* postconfiguration */ |
177
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19 |
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20 NULL, /* create main configuration */ |
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21 NULL, /* init main configuration */ |
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22 |
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23 NULL, /* create server configuration */ |
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24 NULL, /* merge server configuration */ |
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25 |
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26 NULL, /* create location configuration */ |
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27 NULL /* merge location configuration */ |
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28 }; |
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29 |
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30 |
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31 ngx_module_t ngx_http_not_modified_filter_module = { |
509 | 32 NGX_MODULE_V1, |
135
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33 &ngx_http_not_modified_filter_module_ctx, /* module context */ |
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34 NULL, /* module directives */ |
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35 NGX_HTTP_MODULE, /* module type */ |
541 | 36 NULL, /* init master */ |
681 | 37 NULL, /* init module */ |
541 | 38 NULL, /* init process */ |
39 NULL, /* init thread */ | |
40 NULL, /* exit thread */ | |
41 NULL, /* exit process */ | |
42 NULL, /* exit master */ | |
43 NGX_MODULE_V1_PADDING | |
135
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44 }; |
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45 |
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46 |
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47 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
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48 |
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49 |
2702 | 50 static ngx_int_t |
51 ngx_http_not_modified_header_filter(ngx_http_request_t *r) | |
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52 { |
2361 | 53 time_t ims; |
54 ngx_http_core_loc_conf_t *clcf; | |
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55 |
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56 if (r->headers_out.status != NGX_HTTP_OK |
597 | 57 || r != r->main |
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58 || r->headers_in.if_modified_since == NULL |
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59 || r->headers_out.last_modified_time == -1) |
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60 { |
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61 return ngx_http_next_header_filter(r); |
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62 } |
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63 |
2496 | 64 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
65 | |
66 if (clcf->if_modified_since == NGX_HTTP_IMS_OFF) { | |
67 return ngx_http_next_header_filter(r); | |
68 } | |
69 | |
135
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70 ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data, |
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71 r->headers_in.if_modified_since->value.len); |
577 | 72 |
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73 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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74 "http ims:%d lm:%d", ims, r->headers_out.last_modified_time); |
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75 |
2361 | 76 if (ims != r->headers_out.last_modified_time) { |
77 | |
2496 | 78 if (clcf->if_modified_since == NGX_HTTP_IMS_EXACT |
2361 | 79 || ims < r->headers_out.last_modified_time) |
80 { | |
81 return ngx_http_next_header_filter(r); | |
82 } | |
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83 } |
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84 |
2361 | 85 r->headers_out.status = NGX_HTTP_NOT_MODIFIED; |
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86 r->headers_out.status_line.len = 0; |
2361 | 87 r->headers_out.content_type.len = 0; |
88 ngx_http_clear_content_length(r); | |
89 ngx_http_clear_accept_ranges(r); | |
90 | |
3441
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91 if (r->headers_out.content_encoding) { |
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92 r->headers_out.content_encoding->hash = 0; |
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93 r->headers_out.content_encoding = NULL; |
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94 } |
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95 |
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96 return ngx_http_next_header_filter(r); |
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97 } |
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98 |
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99 |
2702 | 100 static ngx_int_t |
101 ngx_http_not_modified_filter_init(ngx_conf_t *cf) | |
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102 { |
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103 ngx_http_next_header_filter = ngx_http_top_header_filter; |
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104 ngx_http_top_header_filter = ngx_http_not_modified_header_filter; |
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105 |
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106 return NGX_OK; |
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107 } |