Mercurial > hg > nginx

annotate src/http/modules/ngx_http_not_modified_filter_module.c @ 4616:b194fb640d3e

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Fastcgi: fixed padding handling on fixed-size records. Padding was incorrectly ignored on end request, empty stdout and stderr fastcgi records. This resulted in protocol desynchronization if fastcgi application used these records with padding for some reason. Reported by Ilia Vinokurov.
author Maxim Dounin <mdounin@mdounin.ru>
date Fri, 11 May 2012 13:14:58 +0000
parents d620f497c50f
children 84cc73e01aa8
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
Igor Sysoev <igor@sysoev.ru>
parents: 356
diff changeset
1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents: 356
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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parents: 441
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3 * Copyright (C) Igor Sysoev
4412
d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
parents: 3854
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4 * Copyright (C) Nginx, Inc.
441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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parents: 356
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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6
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e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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7
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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8 #include <ngx_config.h>
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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parents:
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9 #include <ngx_core.h>
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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10 #include <ngx_http.h>
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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11
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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12
3814
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13 static ngx_int_t ngx_http_test_precondition(ngx_http_request_t *r);
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14 static ngx_int_t ngx_http_test_not_modified(ngx_http_request_t *r);
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7e24168b0853 nginx-0.4.0-RELEASE import
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parents: 597
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15 static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf);
135
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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16
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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17
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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18 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = {
509
9b8c906f6e63 nginx-0.1.29-RELEASE import
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19 NULL, /* preconfiguration */
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20 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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21
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22 NULL, /* create main configuration */
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23 NULL, /* init main configuration */
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24
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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25 NULL, /* create server configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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26 NULL, /* merge server configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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27
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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28 NULL, /* create location configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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29 NULL /* merge location configuration */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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30 };
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31
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32
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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33 ngx_module_t ngx_http_not_modified_filter_module = {
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34 NGX_MODULE_V1,
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35 &ngx_http_not_modified_filter_module_ctx, /* module context */
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36 NULL, /* module directives */
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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37 NGX_HTTP_MODULE, /* module type */
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38 NULL, /* init master */
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39 NULL, /* init module */
541
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40 NULL, /* init process */
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41 NULL, /* init thread */
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42 NULL, /* exit thread */
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43 NULL, /* exit process */
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44 NULL, /* exit master */
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45 NGX_MODULE_V1_PADDING
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46 };
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47
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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48
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
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49 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
135
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50
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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51
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52 static ngx_int_t
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53 ngx_http_not_modified_header_filter(ngx_http_request_t *r)
135
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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54 {
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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55 if (r->headers_out.status != NGX_HTTP_OK
597
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56 || r != r->main
142
cb77c084acdb nginx-0.0.1-2003-10-09-11:00:45 import
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parents: 136
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57 || r->headers_out.last_modified_time == -1)
135
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58 {
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59 return ngx_http_next_header_filter(r);
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60 }
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61
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62 if (r->headers_in.if_unmodified_since) {
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63 return ngx_http_test_precondition(r);
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64 }
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65
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66 if (r->headers_in.if_modified_since) {
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67 return ngx_http_test_not_modified(r);
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68 }
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69
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70 return ngx_http_next_header_filter(r);
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71 }
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72
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73
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74 static ngx_int_t
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75 ngx_http_test_precondition(ngx_http_request_t *r)
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76 {
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77 time_t iums;
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78
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79 iums = ngx_http_parse_time(r->headers_in.if_unmodified_since->value.data,
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80 r->headers_in.if_unmodified_since->value.len);
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81
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82 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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83 "http iums:%d lm:%d", iums, r->headers_out.last_modified_time);
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84
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85 if (iums >= r->headers_out.last_modified_time) {
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86 return ngx_http_next_header_filter(r);
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87 }
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88
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89 return ngx_http_filter_finalize_request(r, NULL,
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90 NGX_HTTP_PRECONDITION_FAILED);
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91 }
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92
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93
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94 static ngx_int_t
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95 ngx_http_test_not_modified(ngx_http_request_t *r)
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96 {
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97 time_t ims;
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98 ngx_http_core_loc_conf_t *clcf;
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99
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100 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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101
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102 if (clcf->if_modified_since == NGX_HTTP_IMS_OFF) {
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103 return ngx_http_next_header_filter(r);
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104 }
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105
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106 ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data,
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
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107 r->headers_in.if_modified_since->value.len);
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108
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109 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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110 "http ims:%d lm:%d", ims, r->headers_out.last_modified_time);
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111
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112 if (ims != r->headers_out.last_modified_time) {
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113
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114 if (clcf->if_modified_since == NGX_HTTP_IMS_EXACT
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115 || ims < r->headers_out.last_modified_time)
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116 {
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117 return ngx_http_next_header_filter(r);
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118 }
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119 }
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120
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121 r->headers_out.status = NGX_HTTP_NOT_MODIFIED;
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122 r->headers_out.status_line.len = 0;
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123 r->headers_out.content_type.len = 0;
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124 ngx_http_clear_content_length(r);
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125 ngx_http_clear_accept_ranges(r);
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126
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793ae4dd91e9 remove "Content-Encoding: gzip" in 304 response
Igor Sysoev <igor@sysoev.ru>
parents: 2702
diff changeset
127 if (r->headers_out.content_encoding) {
793ae4dd91e9 remove "Content-Encoding: gzip" in 304 response
Igor Sysoev <igor@sysoev.ru>
parents: 2702
diff changeset
128 r->headers_out.content_encoding->hash = 0;
793ae4dd91e9 remove "Content-Encoding: gzip" in 304 response
Igor Sysoev <igor@sysoev.ru>
parents: 2702
diff changeset
129 r->headers_out.content_encoding = NULL;
793ae4dd91e9 remove "Content-Encoding: gzip" in 304 response
Igor Sysoev <igor@sysoev.ru>
parents: 2702
diff changeset
130 }
793ae4dd91e9 remove "Content-Encoding: gzip" in 304 response
Igor Sysoev <igor@sysoev.ru>
parents: 2702
diff changeset
131
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 153
diff changeset
132 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
133 }
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
134
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
135
2702
eace65d6092b style fix
Igor Sysoev <igor@sysoev.ru>
parents: 2592
diff changeset
136 static ngx_int_t
eace65d6092b style fix
Igor Sysoev <igor@sysoev.ru>
parents: 2592
diff changeset
137 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
138 {
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 153
diff changeset
139 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
140 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
141
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
142 return NGX_OK;
e29909bd9b8a nginx-0.0.1-2003-09-28-23:29:06 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
143 }