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annotate src/http/modules/ngx_http_secure_link_module.c @ 3760:38f74d11e5bd

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discard "secure_link_expires on|off"
author Igor Sysoev <igor@sysoev.ru>
date Mon, 06 Sep 2010 14:19:18 +0000
parents 7224d008faaf
children 0a84dc5f5613
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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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 #include <ngx_md5.h>
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11
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12
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13 typedef struct {
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14 ngx_http_complex_value_t *variable;
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15 ngx_http_complex_value_t *md5;
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16 ngx_str_t secret;
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17 } ngx_http_secure_link_conf_t;
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18
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19
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20 typedef struct {
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21 ngx_str_t expires;
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22 } ngx_http_secure_link_ctx_t;
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23
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24
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25 static ngx_int_t ngx_http_secure_link_old_variable(ngx_http_request_t *r,
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26 ngx_http_secure_link_conf_t *conf, ngx_http_variable_value_t *v,
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27 uintptr_t data);
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28 static ngx_int_t ngx_http_secure_link_expires_variable(ngx_http_request_t *r,
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29 ngx_http_variable_value_t *v, uintptr_t data);
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30 static void *ngx_http_secure_link_create_conf(ngx_conf_t *cf);
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31 static char *ngx_http_secure_link_merge_conf(ngx_conf_t *cf, void *parent,
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32 void *child);
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33 static ngx_int_t ngx_http_secure_link_add_variables(ngx_conf_t *cf);
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34
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35
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36 static ngx_command_t ngx_http_secure_link_commands[] = {
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37
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38 { ngx_string("secure_link"),
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39 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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40 ngx_http_set_comlex_value_slot,
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41 NGX_HTTP_LOC_CONF_OFFSET,
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42 offsetof(ngx_http_secure_link_conf_t, variable),
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43 NULL },
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44
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45 { ngx_string("secure_link_md5"),
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46 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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47 ngx_http_set_comlex_value_slot,
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48 NGX_HTTP_LOC_CONF_OFFSET,
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49 offsetof(ngx_http_secure_link_conf_t, md5),
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50 NULL },
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51
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52 { ngx_string("secure_link_secret"),
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53 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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54 ngx_conf_set_str_slot,
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55 NGX_HTTP_LOC_CONF_OFFSET,
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56 offsetof(ngx_http_secure_link_conf_t, secret),
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57 NULL },
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58
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59 ngx_null_command
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60 };
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61
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62
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63 static ngx_http_module_t ngx_http_secure_link_module_ctx = {
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64 ngx_http_secure_link_add_variables, /* preconfiguration */
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65 NULL, /* postconfiguration */
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66
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67 NULL, /* create main configuration */
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68 NULL, /* init main configuration */
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69
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70 NULL, /* create server configuration */
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71 NULL, /* merge server configuration */
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72
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73 ngx_http_secure_link_create_conf, /* create location configuration */
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74 ngx_http_secure_link_merge_conf /* merge location configuration */
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75 };
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76
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77
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78 ngx_module_t ngx_http_secure_link_module = {
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79 NGX_MODULE_V1,
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80 &ngx_http_secure_link_module_ctx, /* module context */
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81 ngx_http_secure_link_commands, /* module directives */
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82 NGX_HTTP_MODULE, /* module type */
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83 NULL, /* init master */
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84 NULL, /* init module */
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85 NULL, /* init process */
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86 NULL, /* init thread */
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87 NULL, /* exit thread */
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88 NULL, /* exit process */
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89 NULL, /* exit master */
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90 NGX_MODULE_V1_PADDING
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91 };
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92
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93
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94 static ngx_str_t ngx_http_secure_link_name = ngx_string("secure_link");
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95 static ngx_str_t ngx_http_secure_link_expires_name =
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96 ngx_string("secure_link_expires");
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97
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98
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99 static ngx_int_t
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100 ngx_http_secure_link_variable(ngx_http_request_t *r,
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101 ngx_http_variable_value_t *v, uintptr_t data)
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102 {
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103 u_char *p, *last;
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104 ngx_str_t val, hash;
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105 time_t expires;
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106 ngx_md5_t md5;
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107 ngx_http_secure_link_ctx_t *ctx;
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108 ngx_http_secure_link_conf_t *conf;
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109 u_char hash_buf[16], md5_buf[16];
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110
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111 conf = ngx_http_get_module_loc_conf(r, ngx_http_secure_link_module);
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112
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113 if (conf->secret.len) {
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114 return ngx_http_secure_link_old_variable(r, conf, v, data);
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115 }
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116
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117 if (conf->variable == NULL || conf->md5 == NULL) {
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118 goto not_found;
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119 }
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120
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121 if (ngx_http_complex_value(r, conf->variable, &val) != NGX_OK) {
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122 return NGX_ERROR;
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123 }
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124
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diff changeset
125 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
126 "secure link: \"%V\"", &val);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
127
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
128 last = val.data + val.len;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
129
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
130 p = ngx_strlchr(val.data, last, ',');
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
131 expires = 0;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
132
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
133 if (p) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
134 val.len = p++ - val.data;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
135
3760
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
136 expires = ngx_atotm(p, last - p);
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
137 if (expires <= 0) {
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
138 goto not_found;
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
139 }
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
140
3760
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
141 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_secure_link_ctx_t));
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
142 if (ctx == NULL) {
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
143 return NGX_ERROR;
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
144 }
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
145
3760
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
146 ngx_http_set_ctx(r, ctx, ngx_http_secure_link_module);
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
147
3760
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
148 ctx->expires.len = last - p;
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
149 ctx->expires.data = p;
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
150 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
151
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
152 if (val.len > 24) {
2260
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
153 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
154 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
155
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
156 hash.len = 16;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
157 hash.data = hash_buf;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
158
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
159 if (ngx_decode_base64url(&hash, &val) != NGX_OK) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
160 goto not_found;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
161 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
162
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
163 if (hash.len != 16) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
164 goto not_found;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
165 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
166
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
167 if (ngx_http_complex_value(r, conf->md5, &val) != NGX_OK) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
168 return NGX_ERROR;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
169 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
170
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
171 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
172 "secure link md5: \"%V\"", &val);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
173
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
174 ngx_md5_init(&md5);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
175 ngx_md5_update(&md5, val.data, val.len);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
176 ngx_md5_final(md5_buf, &md5);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
177
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
178 if (ngx_memcmp(hash_buf, md5_buf, 16) != 0) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
179 goto not_found;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
180 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
181
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
182 v->data = (u_char *) ((expires && expires < ngx_time()) ? "0" : "1");
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
183 v->len = 1;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
184 v->valid = 1;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
185 v->no_cacheable = 0;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
186 v->not_found = 0;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
187
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
188 return NGX_OK;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
189
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
190 not_found:
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
191
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
192 v->not_found = 1;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
193
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
194 return NGX_OK;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
195 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
196
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
197
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
198 static ngx_int_t
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
199 ngx_http_secure_link_old_variable(ngx_http_request_t *r,
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
200 ngx_http_secure_link_conf_t *conf, ngx_http_variable_value_t *v,
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
201 uintptr_t data)
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
202 {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
203 u_char *p, *start, *end, *last;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
204 size_t len;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
205 ngx_int_t n;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
206 ngx_uint_t i;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
207 ngx_md5_t md5;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
208 u_char hash[16];
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
209
2260
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
210 p = &r->unparsed_uri.data[1];
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
211 last = r->unparsed_uri.data + r->unparsed_uri.len;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
212
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
213 while (p < last) {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
214 if (*p++ == '/') {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
215 start = p;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
216 goto md5_start;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
217 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
218 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
219
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
220 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
221
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
222 md5_start:
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
223
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
224 while (p < last) {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
225 if (*p++ == '/') {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
226 end = p - 1;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
227 goto url_start;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
228 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
229 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
230
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
231 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
232
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
233 url_start:
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
234
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
235 len = last - p;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
236
2279
bbb17a60ec44 allow short secure links
Igor Sysoev <igor@sysoev.ru>
parents: 2260
diff changeset
237 if (end - start != 32 || len == 0) {
2260
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
238 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
239 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
240
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
241 ngx_md5_init(&md5);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
242 ngx_md5_update(&md5, p, len);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
243 ngx_md5_update(&md5, conf->secret.data, conf->secret.len);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
244 ngx_md5_final(hash, &md5);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
245
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
246 for (i = 0; i < 16; i++) {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
247 n = ngx_hextoi(&start[2 * i], 2);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
248 if (n == NGX_ERROR || n != hash[i]) {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
249 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
250 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
251 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
252
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
253 v->len = len;
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254 v->valid = 1;
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255 v->no_cacheable = 0;
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256 v->not_found = 0;
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257 v->data = p;
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258
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259 return NGX_OK;
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260
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261 not_found:
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262
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263 v->not_found = 1;
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264
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265 return NGX_OK;
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266 }
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267
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268
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269 static ngx_int_t
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270 ngx_http_secure_link_expires_variable(ngx_http_request_t *r,
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271 ngx_http_variable_value_t *v, uintptr_t data)
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272 {
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273 ngx_http_secure_link_ctx_t *ctx;
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274
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275 ctx = ngx_http_get_module_ctx(r, ngx_http_secure_link_module);
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276
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277 if (ctx) {
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278 v->len = ctx->expires.len;
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279 v->valid = 1;
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280 v->no_cacheable = 0;
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281 v->not_found = 0;
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282 v->data = ctx->expires.data;
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283
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284 } else {
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285 v->not_found = 1;
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286 }
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287
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288 return NGX_OK;
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289 }
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290
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291
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292 static void *
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293 ngx_http_secure_link_create_conf(ngx_conf_t *cf)
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294 {
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295 ngx_http_secure_link_conf_t *conf;
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296
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297 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_secure_link_conf_t));
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298 if (conf == NULL) {
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299 return NULL;
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300 }
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301
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302 /*
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303 * set by ngx_pcalloc():
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304 *
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305 * conf->variable = NULL;
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306 * conf->md5 = NULL;
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307 * conf->secret = { 0, NULL };
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308 */
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309
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310 return conf;
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311 }
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312
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313
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314 static char *
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315 ngx_http_secure_link_merge_conf(ngx_conf_t *cf, void *parent, void *child)
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316 {
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317 ngx_http_secure_link_conf_t *prev = parent;
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318 ngx_http_secure_link_conf_t *conf = child;
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319
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320 ngx_conf_merge_str_value(conf->secret, prev->secret, "");
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321
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322 if (conf->variable == NULL) {
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323 conf->variable = prev->variable;
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324 }
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325
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326 if (conf->md5 == NULL) {
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327 conf->md5 = prev->md5;
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328 }
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329
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330 return NGX_CONF_OK;
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331 }
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332
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333
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334 static ngx_int_t
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335 ngx_http_secure_link_add_variables(ngx_conf_t *cf)
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336 {
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337 ngx_http_variable_t *var;
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338
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339 var = ngx_http_add_variable(cf, &ngx_http_secure_link_name, 0);
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340 if (var == NULL) {
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341 return NGX_ERROR;
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342 }
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343
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344 var->get_handler = ngx_http_secure_link_variable;
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345
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346 var = ngx_http_add_variable(cf, &ngx_http_secure_link_expires_name, 0);
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347 if (var == NULL) {
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348 return NGX_ERROR;
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349 }
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350
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351 var->get_handler = ngx_http_secure_link_expires_variable;
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352
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353 return NGX_OK;
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354 }