Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_not_modified_filter_module.c @ 3938:1e90599af73b
use !aNULL to disable all anonymous cipher suites
patch by Rob Stradling
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 27 Jun 2011 15:47:51 +0000 |
parents | 80cc7c8bb845 |
children | d620f497c50f |
rev | line source |
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441
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1 |
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2 /* |
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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 static ngx_int_t ngx_http_test_precondition(ngx_http_request_t *r); |
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13 static ngx_int_t ngx_http_test_not_modified(ngx_http_request_t *r); |
681 | 14 static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf); |
135
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15 |
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16 |
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17 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = { |
509 | 18 NULL, /* preconfiguration */ |
681 | 19 ngx_http_not_modified_filter_init, /* postconfiguration */ |
177
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20 |
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21 NULL, /* create main configuration */ |
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22 NULL, /* init main configuration */ |
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23 |
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24 NULL, /* create server configuration */ |
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25 NULL, /* merge server configuration */ |
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26 |
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27 NULL, /* create location configuration */ |
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28 NULL /* merge location configuration */ |
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29 }; |
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30 |
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31 |
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32 ngx_module_t ngx_http_not_modified_filter_module = { |
509 | 33 NGX_MODULE_V1, |
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34 &ngx_http_not_modified_filter_module_ctx, /* module context */ |
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35 NULL, /* module directives */ |
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36 NGX_HTTP_MODULE, /* module type */ |
541 | 37 NULL, /* init master */ |
681 | 38 NULL, /* init module */ |
541 | 39 NULL, /* init process */ |
40 NULL, /* init thread */ | |
41 NULL, /* exit thread */ | |
42 NULL, /* exit process */ | |
43 NULL, /* exit master */ | |
44 NGX_MODULE_V1_PADDING | |
135
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45 }; |
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46 |
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47 |
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48 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
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49 |
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50 |
2702 | 51 static ngx_int_t |
52 ngx_http_not_modified_header_filter(ngx_http_request_t *r) | |
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53 { |
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54 if (r->headers_out.status != NGX_HTTP_OK |
597 | 55 || r != r->main |
142
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56 || r->headers_out.last_modified_time == -1) |
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57 { |
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58 return ngx_http_next_header_filter(r); |
135
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59 } |
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60 |
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61 if (r->headers_in.if_unmodified_since) { |
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62 return ngx_http_test_precondition(r); |
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63 } |
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64 |
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65 if (r->headers_in.if_modified_since) { |
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66 return ngx_http_test_not_modified(r); |
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67 } |
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68 |
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69 return ngx_http_next_header_filter(r); |
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70 } |
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71 |
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72 |
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73 static ngx_int_t |
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74 ngx_http_test_precondition(ngx_http_request_t *r) |
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75 { |
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76 time_t iums; |
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77 |
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78 iums = ngx_http_parse_time(r->headers_in.if_unmodified_since->value.data, |
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79 r->headers_in.if_unmodified_since->value.len); |
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80 |
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81 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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82 "http iums:%d lm:%d", iums, r->headers_out.last_modified_time); |
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83 |
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84 if (iums >= r->headers_out.last_modified_time) { |
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85 return ngx_http_next_header_filter(r); |
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86 } |
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87 |
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88 return ngx_http_filter_finalize_request(r, NULL, |
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89 NGX_HTTP_PRECONDITION_FAILED); |
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90 } |
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91 |
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92 |
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93 static ngx_int_t |
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94 ngx_http_test_not_modified(ngx_http_request_t *r) |
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95 { |
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96 time_t ims; |
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97 ngx_http_core_loc_conf_t *clcf; |
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98 |
2496 | 99 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
100 | |
101 if (clcf->if_modified_since == NGX_HTTP_IMS_OFF) { | |
102 return ngx_http_next_header_filter(r); | |
103 } | |
104 | |
135
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105 ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data, |
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106 r->headers_in.if_modified_since->value.len); |
577 | 107 |
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108 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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109 "http ims:%d lm:%d", ims, r->headers_out.last_modified_time); |
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110 |
2361 | 111 if (ims != r->headers_out.last_modified_time) { |
112 | |
2496 | 113 if (clcf->if_modified_since == NGX_HTTP_IMS_EXACT |
2361 | 114 || ims < r->headers_out.last_modified_time) |
115 { | |
116 return ngx_http_next_header_filter(r); | |
117 } | |
135
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118 } |
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119 |
2361 | 120 r->headers_out.status = NGX_HTTP_NOT_MODIFIED; |
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121 r->headers_out.status_line.len = 0; |
2361 | 122 r->headers_out.content_type.len = 0; |
123 ngx_http_clear_content_length(r); | |
124 ngx_http_clear_accept_ranges(r); | |
125 | |
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126 if (r->headers_out.content_encoding) { |
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127 r->headers_out.content_encoding->hash = 0; |
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128 r->headers_out.content_encoding = NULL; |
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129 } |
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130 |
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131 return ngx_http_next_header_filter(r); |
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132 } |
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133 |
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134 |
2702 | 135 static ngx_int_t |
136 ngx_http_not_modified_filter_init(ngx_conf_t *cf) | |
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137 { |
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Igor Sysoev <igor@sysoev.ru>
parents:
153
diff
changeset
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138 ngx_http_next_header_filter = ngx_http_top_header_filter; |
135
e29909bd9b8a
nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
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139 ngx_http_top_header_filter = ngx_http_not_modified_header_filter; |
e29909bd9b8a
nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
140 |
e29909bd9b8a
nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
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141 return NGX_OK; |
e29909bd9b8a
nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
142 } |