Mercurial > hg > nginx

annotate src/http/modules/ngx_http_not_modified_filter_module.c @ 3854:80cc7c8bb845

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style fix: remove trailing spaces
author Igor Sysoev <igor@sysoev.ru>
date Thu, 20 Jan 2011 15:29:53 +0000
parents e6e453203bae
children d620f497c50f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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9 #include <ngx_http.h>
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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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);
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14 static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf);
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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17 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = {
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18 NULL, /* preconfiguration */
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19 ngx_http_not_modified_filter_init, /* postconfiguration */
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4db54fdbcbe7 nginx-0.0.1-2003-11-10-20:17:31 import
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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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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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32 ngx_module_t ngx_http_not_modified_filter_module = {
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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 */
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37 NULL, /* init master */
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38 NULL, /* init module */
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39 NULL, /* init process */
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40 NULL, /* init thread */
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41 NULL, /* exit thread */
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42 NULL, /* exit process */
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43 NULL, /* exit master */
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44 NGX_MODULE_V1_PADDING
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45 };
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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
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51 static ngx_int_t
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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
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55 || r != r->main
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cb77c084acdb nginx-0.0.1-2003-10-09-11:00:45 import
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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);
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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
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99 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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100
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101 if (clcf->if_modified_since == NGX_HTTP_IMS_OFF) {
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102 return ngx_http_next_header_filter(r);
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103 }
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104
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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);
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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
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111 if (ims != r->headers_out.last_modified_time) {
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112
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113 if (clcf->if_modified_since == NGX_HTTP_IMS_EXACT
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114 || ims < r->headers_out.last_modified_time)
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115 {
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116 return ngx_http_next_header_filter(r);
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117 }
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118 }
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119
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120 r->headers_out.status = NGX_HTTP_NOT_MODIFIED;
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121 r->headers_out.status_line.len = 0;
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122 r->headers_out.content_type.len = 0;
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123 ngx_http_clear_content_length(r);
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124 ngx_http_clear_accept_ranges(r);
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125
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126 if (r->headers_out.content_encoding) {
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127 r->headers_out.content_encoding->hash = 0;
793ae4dd91e9 remove "Content-Encoding: gzip" in 304 response
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parents: 2702
diff changeset
128 r->headers_out.content_encoding = NULL;
793ae4dd91e9 remove "Content-Encoding: gzip" in 304 response
Igor Sysoev <igor@sysoev.ru>
parents: 2702
diff changeset
129 }
793ae4dd91e9 remove "Content-Encoding: gzip" in 304 response
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parents: 2702
diff changeset
130
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 153
diff changeset
131 return ngx_http_next_header_filter(r);
135
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
132 }
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
133
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
134
2702
eace65d6092b style fix
Igor Sysoev <igor@sysoev.ru>
parents: 2592
diff changeset
135 static ngx_int_t
eace65d6092b style fix
Igor Sysoev <igor@sysoev.ru>
parents: 2592
diff changeset
136 ngx_http_not_modified_filter_init(ngx_conf_t *cf)
135
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
137 {
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 153
diff changeset
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
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
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 }