50
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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
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11
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12 typedef struct {
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58
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13 ngx_str_t name;
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14 ngx_uint_t wildcard;
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50
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15 } ngx_http_rewrite_referer_t;
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16
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17
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18 typedef struct {
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58
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19 ngx_str_t *name;
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20 ngx_http_variable_value_t *value;
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50
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21 } ngx_http_rewrite_variable_t;
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22
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23
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24 typedef struct {
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58
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25 ngx_array_t *codes; /* uintptr_t */
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26 ngx_array_t *referers; /* ngx_http_rewrite_referer_t */
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27
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28 ngx_uint_t max_captures;
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29 ngx_uint_t stack_size;
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30
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31 ngx_flag_t log;
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32
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58
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33 ngx_flag_t no_referer;
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34 ngx_flag_t blocked_referer;
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50
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35 } ngx_http_rewrite_loc_conf_t;
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36
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37
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38 static void *ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf);
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39 static char *ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf,
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40 void *parent, void *child);
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41 static ngx_int_t ngx_http_rewrite_init(ngx_cycle_t *cycle);
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42 static char *ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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43 static char *ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd,
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44 void *conf);
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45 static char *ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd,
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46 void *conf);
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47 static char * ngx_http_rewrite_if_condition(ngx_conf_t *cf,
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48 ngx_http_rewrite_loc_conf_t *lcf);
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49 static char *ngx_http_rewrite_variable(ngx_conf_t *cf,
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50 ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value);
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51 static char *ngx_http_rewrite_valid_referers(ngx_conf_t *cf,
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52 ngx_command_t *cmd, void *conf);
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58
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53 static char *ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd,
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54 void *conf);
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55
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56
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57 static ngx_command_t ngx_http_rewrite_commands[] = {
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58
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59 { ngx_string("rewrite"),
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60 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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61 |NGX_CONF_TAKE23,
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62 ngx_http_rewrite,
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63 NGX_HTTP_LOC_CONF_OFFSET,
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64 0,
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65 NULL },
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66
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67 { ngx_string("return"),
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68 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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69 |NGX_CONF_TAKE1,
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70 ngx_http_rewrite_return,
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71 NGX_HTTP_LOC_CONF_OFFSET,
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72 0,
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73 NULL },
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74
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75 { ngx_string("if"),
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76 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_1MORE,
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77 ngx_http_rewrite_if,
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78 NGX_HTTP_LOC_CONF_OFFSET,
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79 0,
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80 NULL },
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81
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82 { ngx_string("valid_referers"),
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83 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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84 ngx_http_rewrite_valid_referers,
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85 NGX_HTTP_LOC_CONF_OFFSET,
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86 0,
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87 NULL },
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88
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89 { ngx_string("set"),
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90 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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91 |NGX_CONF_TAKE2,
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92 ngx_http_rewrite_set,
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93 NGX_HTTP_LOC_CONF_OFFSET,
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94 0,
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95 NULL },
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96
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97 { ngx_string("rewrite_log"),
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98 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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99 |NGX_CONF_TAKE1,
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100 ngx_conf_set_flag_slot,
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101 NGX_HTTP_LOC_CONF_OFFSET,
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102 offsetof(ngx_http_rewrite_loc_conf_t, log),
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103 NULL },
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104
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105 ngx_null_command
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106 };
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107
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108
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109 ngx_http_module_t ngx_http_rewrite_module_ctx = {
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110 NULL, /* preconfiguration */
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111 NULL, /* postconfiguration */
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112
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113 NULL, /* create main configuration */
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114 NULL, /* init main configuration */
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115
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116 NULL, /* create server configuration */
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117 NULL, /* merge server configuration */
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118
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119 ngx_http_rewrite_create_loc_conf, /* create location configration */
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120 ngx_http_rewrite_merge_loc_conf /* merge location configration */
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121 };
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122
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123
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124 ngx_module_t ngx_http_rewrite_module = {
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125 NGX_MODULE_V1,
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126 &ngx_http_rewrite_module_ctx, /* module context */
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127 ngx_http_rewrite_commands, /* module directives */
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128 NGX_HTTP_MODULE, /* module type */
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129 ngx_http_rewrite_init, /* init module */
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130 NULL /* init process */
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131 };
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132
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133
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134 static ngx_http_variable_value_t ngx_http_rewrite_null_value =
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135 { 0, ngx_string("") };
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136
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137
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138 static ngx_int_t
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139 ngx_http_rewrite_handler(ngx_http_request_t *r)
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140 {
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141 ngx_http_script_code_pt code;
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142 ngx_http_script_engine_t *e;
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143 ngx_http_rewrite_loc_conf_t *cf;
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144
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145 cf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
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146
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147 if (cf->codes == NULL) {
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148 return NGX_DECLINED;
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149 }
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150
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151 e = ngx_pcalloc(r->pool, sizeof(ngx_http_script_engine_t));
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152 if (e == NULL) {
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153 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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154 }
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155
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156 e->sp = ngx_pcalloc(r->pool,
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157 cf->stack_size * sizeof(ngx_http_variable_value_t));
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158 if (e->sp == NULL) {
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159 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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160 }
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161
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162 if (cf->max_captures) {
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163 e->captures = ngx_palloc(r->pool, cf->max_captures * sizeof(int));
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164 if (e->captures == NULL) {
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165 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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166 }
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167
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168 } else {
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169 e->captures = NULL;
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170 }
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171
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172 e->ip = cf->codes->elts;
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173 e->request = r;
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174 e->quote = 1;
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175 e->log = cf->log;
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176 e->status = NGX_DECLINED;
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177
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178 while (*(uintptr_t *) e->ip) {
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179 code = *(ngx_http_script_code_pt *) e->ip;
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180 code(e);
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181 }
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182
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183 return e->status;
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184 }
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185
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186
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187 static void
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188 ngx_http_rewrite_invalid_referer_code(ngx_http_script_engine_t *e)
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189 {
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190 u_char *ref;
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191 size_t len;
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192 ngx_uint_t i, n;
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193 ngx_http_request_t *r;
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194 ngx_http_rewrite_referer_t *refs;
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195 ngx_http_rewrite_loc_conf_t *cf;
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196
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197 r = e->request;
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198
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199 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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200 "http rewrite invalid referer");
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201
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202 cf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
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203
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204 e->ip += sizeof(uintptr_t);
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205
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206 if (cf->referers == NULL) {
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207 e->sp->value = 0;
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208 e->sp->text.len = 0;
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209 e->sp->text.data = (u_char *) "";
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210 e->sp++;
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211
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212 return;
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213 }
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214
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215 if (r->headers_in.referer == NULL) {
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216 if (cf->no_referer) {
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217 e->sp->value = 0;
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218 e->sp->text.len = 0;
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219 e->sp->text.data = (u_char *) "";
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220 e->sp++;
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221
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222 return;
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54
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223
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224 } else {
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225 e->sp->value = 1;
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226 e->sp->text.len = 1;
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227 e->sp->text.data = (u_char *) "1";
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228 e->sp++;
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229
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230 return;
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231 }
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232 }
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233
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234 len = r->headers_in.referer->value.len;
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235 ref = r->headers_in.referer->value.data;
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236
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237 if (len < sizeof("http://i.ru") - 1
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238 || (ngx_strncasecmp(ref, "http://", 7) != 0))
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239 {
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240 if (cf->blocked_referer) {
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241 e->sp->value = 0;
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242 e->sp->text.len = 0;
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243 e->sp->text.data = (u_char *) "0";
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244 e->sp++;
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245
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246 return;
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247
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54
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248 } else {
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249 e->sp->value = 1;
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250 e->sp->text.len = 1;
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251 e->sp->text.data = (u_char *) "1";
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252 e->sp++;
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253
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254 return;
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255 }
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256 }
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257
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258 len -= 7;
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259 ref += 7;
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260
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261 refs = cf->referers->elts;
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262 for (i = 0; i < cf->referers->nelts; i++ ){
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263
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264 if (refs[i].name.len > len) {
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265 continue;
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266 }
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267
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268 if (refs[i].wildcard) {
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269 for (n = 0; n < len; n++) {
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270 if (ref[n] == '/' || ref[n] == ':') {
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271 break;
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272 }
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273
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274 if (ref[n] != '.') {
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275 continue;
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276 }
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277
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278 if (ngx_strncmp(&ref[n], refs[i].name.data,
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279 refs[i].name.len) == 0)
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280 {
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281 e->sp->value = 0;
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282 e->sp->text.len = 0;
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283 e->sp->text.data = (u_char *) "";
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284 e->sp++;
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285
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286 return;
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287 }
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288 }
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289
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290 } else {
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291 if (ngx_strncasecmp(refs[i].name.data, ref, refs[i].name.len) == 0)
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292 {
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293 e->sp->value = 0;
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294 e->sp->text.len = 0;
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295 e->sp->text.data = (u_char *) "";
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296 e->sp++;
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297
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298 return;
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299 }
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300 }
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301 }
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302
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303 e->sp->value = 1;
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304 e->sp->text.len = 1;
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305 e->sp->text.data = (u_char *) "1";
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306 e->sp++;
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307 }
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308
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309
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310 static ngx_http_variable_value_t *
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311 ngx_http_rewrite_var(ngx_http_request_t *r, uintptr_t data)
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312 {
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313 ngx_http_variable_t *var;
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314 ngx_http_core_main_conf_t *cmcf;
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315
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316 cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
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317
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318 var = cmcf->variables.elts;
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319
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320 /*
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321 * the ngx_http_rewrite_module sets variables directly in r->variables,
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322 * and they should be handle by ngx_http_get_indexed_variable(),
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323 * so the handler is called only if the variable is not initialized
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324 */
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325
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326 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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327 "using uninitialized \"%V\" variable", &var[data].name);
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328
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329 return &ngx_http_rewrite_null_value;
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330 }
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331
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332
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333 static void *
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334 ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf)
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335 {
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336 ngx_http_rewrite_loc_conf_t *conf;
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337
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338 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_rewrite_loc_conf_t));
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339 if (conf == NULL) {
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340 return NGX_CONF_ERROR;
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341 }
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342
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343 conf->stack_size = NGX_CONF_UNSET_UINT;
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344 conf->log = NGX_CONF_UNSET;
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345 conf->no_referer = NGX_CONF_UNSET;
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346 conf->blocked_referer = NGX_CONF_UNSET;
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347
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348 return conf;
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349 }
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350
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351
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352 static char *
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353 ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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354 {
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355 ngx_http_rewrite_loc_conf_t *prev = parent;
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356 ngx_http_rewrite_loc_conf_t *conf = child;
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357
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58
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358 uintptr_t *code;
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359
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360 ngx_conf_merge_value(conf->log, prev->log, 0);
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361 ngx_conf_merge_unsigned_value(conf->stack_size, prev->stack_size, 10);
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362
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363 if (conf->referers == NULL) {
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364 conf->referers = prev->referers;
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365 ngx_conf_merge_value(conf->no_referer, prev->no_referer, 0);
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366 ngx_conf_merge_value(conf->blocked_referer, prev->blocked_referer, 0);
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367 }
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368
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369 if (conf->no_referer == NGX_CONF_UNSET) {
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370 conf->no_referer = 0;
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371 }
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372
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373 if (conf->blocked_referer == NGX_CONF_UNSET) {
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374 conf->blocked_referer = 0;
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375 }
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376
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377 if (conf->codes == NULL) {
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378 return NGX_CONF_OK;
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379 }
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380
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381 if (conf->codes == prev->codes) {
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382 return NGX_CONF_OK;
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383 }
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384
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385 code = ngx_array_push_n(conf->codes, sizeof(uintptr_t));
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386 if (code == NULL) {
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387 return NGX_CONF_ERROR;
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388 }
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389
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390 *code = (uintptr_t) NULL;
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391
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392 return NGX_CONF_OK;
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393 }
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394
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395
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58
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396 static ngx_int_t
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397 ngx_http_rewrite_init(ngx_cycle_t *cycle)
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398 {
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399 ngx_http_handler_pt *h;
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400 ngx_http_core_main_conf_t *cmcf;
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401
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402 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
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403
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404 h = ngx_array_push(&cmcf->phases[NGX_HTTP_REWRITE_PHASE].handlers);
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405 if (h == NULL) {
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406 return NGX_ERROR;
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407 }
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408
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409 *h = ngx_http_rewrite_handler;
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410
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411 return NGX_OK;
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412 }
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413
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414
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50
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415 static char *
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416 ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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417 {
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418 ngx_http_rewrite_loc_conf_t *lcf = conf;
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419
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58
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420 ngx_str_t *value, err;
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421 ngx_int_t n;
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422 ngx_uint_t last;
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423 ngx_http_script_code_pt *code;
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424 ngx_http_script_compile_t sc;
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425 ngx_http_script_regex_code_t *regex;
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426 ngx_http_script_regex_end_code_t *regex_end;
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427 u_char errstr[NGX_MAX_CONF_ERRSTR];
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50
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428
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58
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429 regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
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430 sizeof(ngx_http_script_regex_code_t));
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50
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431 if (regex == NULL) {
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432 return NGX_CONF_ERROR;
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433 }
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434
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58
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435 ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));
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436
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50
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437 value = cf->args->elts;
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438
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439 err.len = NGX_MAX_CONF_ERRSTR;
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440 err.data = errstr;
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441
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442 /* TODO: NGX_REGEX_CASELESS */
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443
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444 regex->regex = ngx_regex_compile(&value[1], 0, cf->pool, &err);
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445
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446 if (regex->regex == NULL) {
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447 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s", err.data);
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448 return NGX_CONF_ERROR;
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449 }
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450
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58
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451 regex->code = ngx_http_script_regex_start_code;
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50
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452 regex->uri = 1;
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453 regex->name = value[1];
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454
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58
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455 if (value[2].data[value[2].len - 1] == '?') {
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456
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457 /* the last "?" drops the original arguments */
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458 value[2].len--;
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459
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460 } else {
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461 regex->add_args = 1;
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462 }
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463
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50
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464 last = 0;
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465
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|
466 if (ngx_strncmp(value[2].data, "http://", sizeof("http://") - 1) == 0) {
|
|
467 regex->status = NGX_HTTP_MOVED_TEMPORARILY;
|
|
468 regex->redirect = 1;
|
|
469 last = 1;
|
|
470 }
|
|
471
|
|
472 if (cf->args->nelts == 4) {
|
|
473 if (ngx_strcmp(value[3].data, "last") == 0) {
|
|
474 last = 1;
|
|
475
|
|
476 } else if (ngx_strcmp(value[3].data, "break") == 0) {
|
|
477 regex->break_cycle = 1;
|
|
478 last = 1;
|
|
479
|
|
480 } else if (ngx_strcmp(value[3].data, "redirect") == 0) {
|
|
481 regex->status = NGX_HTTP_MOVED_TEMPORARILY;
|
|
482 regex->redirect = 1;
|
|
483 last = 1;
|
|
484
|
|
485 } else if (ngx_strcmp(value[3].data, "permanent") == 0) {
|
|
486 regex->status = NGX_HTTP_MOVED_PERMANENTLY;
|
|
487 regex->redirect = 1;
|
|
488 last = 1;
|
|
489
|
|
490 } else {
|
|
491 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
492 "invalid parameter \"%V\"", &value[3]);
|
|
493 return NGX_CONF_ERROR;
|
|
494 }
|
|
495 }
|
|
496
|
58
|
497 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
50
|
498
|
58
|
499 sc.cf = cf;
|
|
500 sc.source = &value[2];
|
|
501 sc.lengths = ®ex->lengths;
|
|
502 sc.values = &lcf->codes;
|
|
503 sc.variables = ngx_http_script_variables_count(&value[2]);
|
|
504 sc.main = regex;
|
|
505 sc.complete_lengths = 1;
|
|
506 sc.compile_args = !regex->redirect;
|
50
|
507
|
58
|
508 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
509 return NGX_CONF_ERROR;
|
|
510 }
|
50
|
511
|
58
|
512 regex = sc.main;
|
50
|
513
|
58
|
514 regex->ncaptures = sc.ncaptures;
|
|
515 regex->size = sc.size;
|
|
516 regex->args = sc.args;
|
50
|
517
|
58
|
518 if (sc.variables == 0) {
|
|
519 regex->lengths = NULL;
|
50
|
520 }
|
|
521
|
|
522 n = ngx_regex_capture_count(regex->regex);
|
|
523
|
|
524 if (n < 0) {
|
|
525 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
526 ngx_regex_capture_count_n " failed for "
|
|
527 "pattern \"%V\"", &value[1]);
|
|
528 return NGX_CONF_ERROR;
|
|
529 }
|
|
530
|
|
531 if (regex->ncaptures > (ngx_uint_t) n) {
|
|
532 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
533 "pattern \"%V\" has less captures "
|
|
534 "than referrenced in substitution \"%V\"",
|
|
535 &value[1], &value[2]);
|
|
536 return NGX_CONF_ERROR;
|
|
537 }
|
|
538
|
|
539 if (regex->ncaptures < (ngx_uint_t) n) {
|
|
540 regex->ncaptures = (ngx_uint_t) n;
|
|
541 }
|
|
542
|
|
543 if (regex->ncaptures) {
|
|
544 regex->ncaptures = (regex->ncaptures + 1) * 3;
|
|
545 }
|
|
546
|
58
|
547 if (lcf->max_captures < regex->ncaptures) {
|
|
548 lcf->max_captures = regex->ncaptures;
|
|
549 }
|
|
550
|
|
551 regex_end = ngx_http_script_add_code(lcf->codes,
|
|
552 sizeof(ngx_http_script_regex_end_code_t),
|
|
553 ®ex);
|
50
|
554 if (regex_end == NULL) {
|
|
555 return NGX_CONF_ERROR;
|
|
556 }
|
|
557
|
58
|
558 regex_end->code = ngx_http_script_regex_end_code;
|
50
|
559 regex_end->uri = regex->uri;
|
|
560 regex_end->args = regex->args;
|
58
|
561 regex_end->add_args = regex->add_args;
|
50
|
562 regex_end->redirect = regex->redirect;
|
|
563
|
|
564 if (last) {
|
58
|
565 code = ngx_http_script_add_code(lcf->codes, sizeof(uintptr_t),
|
|
566 ®ex);
|
50
|
567 if (code == NULL) {
|
|
568 return NGX_CONF_ERROR;
|
|
569 }
|
|
570
|
|
571 *code = (uintptr_t) NULL;
|
|
572 }
|
|
573
|
|
574 regex->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
|
|
575 - (u_char *) regex;
|
|
576
|
|
577 return NGX_CONF_OK;
|
|
578 }
|
|
579
|
|
580
|
|
581 static char *
|
|
582 ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
583 {
|
|
584 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
585
|
58
|
586 ngx_str_t *value;
|
|
587 ngx_http_script_return_code_t *ret;
|
50
|
588
|
58
|
589 ret = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
590 sizeof(ngx_http_script_return_code_t));
|
50
|
591 if (ret == NULL) {
|
|
592 return NGX_CONF_ERROR;
|
|
593 }
|
|
594
|
|
595 value = cf->args->elts;
|
|
596
|
58
|
597 ret->code = ngx_http_script_return_code;
|
50
|
598 ret->null = (uintptr_t) NULL;
|
|
599
|
|
600 ret->status = ngx_atoi(value[1].data, value[1].len);
|
|
601
|
|
602 if (ret->status == (uintptr_t) NGX_ERROR) {
|
|
603 return NGX_CONF_ERROR;
|
|
604 }
|
|
605
|
|
606 return NGX_CONF_OK;
|
|
607 }
|
|
608
|
|
609
|
|
610 static char *
|
|
611 ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
612 {
|
|
613 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
614
|
|
615 void *mconf;
|
|
616 char *rv;
|
|
617 u_char *elts;
|
|
618 ngx_uint_t i;
|
|
619 ngx_conf_t save;
|
|
620 ngx_http_module_t *module;
|
|
621 ngx_http_conf_ctx_t *ctx, *pctx;
|
|
622 ngx_http_core_loc_conf_t *clcf, *pclcf, **clcfp;
|
58
|
623 ngx_http_script_if_code_t *if_code;
|
50
|
624 ngx_http_rewrite_loc_conf_t *nlcf;
|
|
625
|
|
626 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t));
|
|
627 if (ctx == NULL) {
|
|
628 return NGX_CONF_ERROR;
|
|
629 }
|
|
630
|
|
631 pctx = cf->ctx;
|
|
632 ctx->main_conf = pctx->main_conf;
|
|
633 ctx->srv_conf = pctx->srv_conf;
|
|
634
|
|
635 ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
|
|
636 if (ctx->loc_conf == NULL) {
|
|
637 return NGX_CONF_ERROR;
|
|
638 }
|
|
639
|
|
640 for (i = 0; ngx_modules[i]; i++) {
|
|
641 if (ngx_modules[i]->type != NGX_HTTP_MODULE) {
|
|
642 continue;
|
|
643 }
|
|
644
|
|
645 module = ngx_modules[i]->ctx;
|
|
646
|
|
647 if (module->create_loc_conf) {
|
|
648
|
|
649 mconf = module->create_loc_conf(cf);
|
|
650 if (mconf == NULL) {
|
|
651 return NGX_CONF_ERROR;
|
|
652 }
|
|
653
|
|
654 ctx->loc_conf[ngx_modules[i]->ctx_index] = mconf;
|
|
655 }
|
|
656 }
|
|
657
|
|
658 pclcf = pctx->loc_conf[ngx_http_core_module.ctx_index];
|
|
659
|
|
660 clcf = ctx->loc_conf[ngx_http_core_module.ctx_index];
|
|
661 clcf->loc_conf = ctx->loc_conf;
|
|
662 clcf->name = pclcf->name;
|
|
663 clcf->noname = 1;
|
|
664
|
|
665 if (pclcf->locations.elts == NULL) {
|
|
666 if (ngx_array_init(&pclcf->locations, cf->pool, 4, sizeof(void *))
|
|
667 == NGX_ERROR)
|
|
668 {
|
|
669 return NGX_CONF_ERROR;
|
|
670 }
|
|
671 }
|
|
672
|
|
673 clcfp = ngx_array_push(&pclcf->locations);
|
|
674 if (clcfp == NULL) {
|
|
675 return NGX_CONF_ERROR;
|
|
676 }
|
|
677
|
|
678 *clcfp = clcf;
|
|
679
|
|
680
|
|
681 if (ngx_http_rewrite_if_condition(cf, lcf) != NGX_CONF_OK) {
|
|
682 return NGX_CONF_ERROR;
|
|
683 }
|
|
684
|
58
|
685 if_code = ngx_array_push_n(lcf->codes, sizeof(ngx_http_script_if_code_t));
|
50
|
686 if (if_code == NULL) {
|
|
687 return NULL;
|
|
688 }
|
|
689
|
58
|
690 if_code->code = ngx_http_script_if_code;
|
50
|
691
|
|
692 elts = lcf->codes->elts;
|
|
693
|
|
694
|
|
695 /* the inside directives must compile to the same code array */
|
|
696
|
|
697 nlcf = ctx->loc_conf[ngx_http_rewrite_module.ctx_index];
|
|
698 nlcf->codes = lcf->codes;
|
|
699
|
|
700
|
|
701 save = *cf;
|
|
702 cf->ctx = ctx;
|
|
703
|
|
704 if (pclcf->name.len == 0) {
|
|
705 if_code->loc_conf = NULL;
|
|
706 cf->cmd_type = NGX_HTTP_SIF_CONF;
|
|
707
|
|
708 } else {
|
|
709 if_code->loc_conf = ctx->loc_conf;
|
|
710 cf->cmd_type = NGX_HTTP_LIF_CONF;
|
|
711 }
|
|
712
|
|
713 rv = ngx_conf_parse(cf, NULL);
|
|
714
|
|
715 *cf = save;
|
|
716
|
|
717 if (rv != NGX_CONF_OK) {
|
|
718 return rv;
|
|
719 }
|
|
720
|
|
721
|
|
722 if (elts != lcf->codes->elts) {
|
58
|
723 if_code = (ngx_http_script_if_code_t *)
|
50
|
724 ((u_char *) if_code + ((u_char *) lcf->codes->elts - elts));
|
|
725 }
|
|
726
|
|
727 if_code->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
|
|
728 - (u_char *) if_code;
|
|
729
|
|
730 return NGX_CONF_OK;
|
|
731 }
|
|
732
|
|
733
|
|
734 static char *
|
|
735 ngx_http_rewrite_if_condition(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf)
|
|
736 {
|
58
|
737 ngx_str_t *value, err;
|
|
738 ngx_uint_t cur, last;
|
|
739 ngx_http_script_regex_code_t *regex;
|
|
740 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
50
|
741
|
|
742 value = cf->args->elts;
|
|
743 last = cf->args->nelts - 1;
|
|
744
|
|
745 if (value[1].len < 1 || value[1].data[0] != '(') {
|
|
746 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
747 "invalid condition \"%V\"", &value[1]);
|
|
748 return NGX_CONF_ERROR;
|
|
749 }
|
|
750
|
|
751 if (value[1].len == 1) {
|
|
752 cur = 2;
|
|
753
|
|
754 } else {
|
|
755 cur = 1;
|
|
756 value[1].len--;
|
|
757 value[1].data++;
|
|
758 }
|
|
759
|
|
760 if (value[last].len < 1 || value[last].data[value[last].len - 1] != ')') {
|
|
761 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
762 "invalid condition \"%V\"", &value[last]);
|
|
763 return NGX_CONF_ERROR;
|
|
764 }
|
|
765
|
|
766 if (value[last].len == 1) {
|
|
767 last--;
|
|
768
|
|
769 } else {
|
|
770 value[last].len--;
|
|
771 value[last].data[value[last].len] = '\0';
|
|
772 }
|
|
773
|
|
774 if (value[cur].len > 1 && value[cur].data[0] == '$') {
|
|
775
|
|
776 if (cur != last && cur + 2 != last) {
|
|
777 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
778 "invalid condition \"%V\"", &value[cur]);
|
|
779 return NGX_CONF_ERROR;
|
|
780 }
|
|
781
|
|
782 if (ngx_http_rewrite_variable(cf, lcf, &value[cur])!= NGX_CONF_OK) {
|
|
783 return NGX_CONF_ERROR;
|
|
784 }
|
|
785
|
|
786 if (cur == last) {
|
|
787 return NGX_CONF_OK;
|
|
788 }
|
|
789
|
|
790 cur++;
|
|
791
|
|
792 if ((value[cur].len == 1 && value[cur].data[0] != '~')
|
|
793 || (value[cur].len == 2
|
|
794 && value[cur].data[0] != '~' && value[cur].data[1] != '*'))
|
|
795 {
|
|
796 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
797 "unexpected \"%V\" in condition", &value[cur]);
|
|
798 return NGX_CONF_ERROR;
|
|
799 }
|
|
800
|
58
|
801 regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
802 sizeof(ngx_http_script_regex_code_t));
|
50
|
803 if (regex == NULL) {
|
|
804 return NGX_CONF_ERROR;
|
|
805 }
|
|
806
|
58
|
807 ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));
|
|
808
|
50
|
809 err.len = NGX_MAX_CONF_ERRSTR;
|
|
810 err.data = errstr;
|
|
811
|
|
812 regex->regex = ngx_regex_compile(&value[last],
|
|
813 (value[cur].len == 2) ? NGX_REGEX_CASELESS : 0,
|
|
814 cf->pool, &err);
|
|
815
|
|
816 if (regex->regex == NULL) {
|
|
817 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s", err.data);
|
|
818 return NGX_CONF_ERROR;
|
|
819 }
|
|
820
|
58
|
821 regex->code = ngx_http_script_regex_start_code;
|
|
822 regex->next = sizeof(ngx_http_script_regex_code_t);
|
50
|
823 regex->test = 1;
|
|
824 regex->name = value[last];
|
|
825
|
|
826 return NGX_CONF_OK;
|
|
827 }
|
|
828
|
|
829 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
830 "invalid condition \"%V\"", &value[cur]);
|
|
831
|
|
832 return NGX_CONF_ERROR;
|
|
833 }
|
|
834
|
|
835
|
|
836 static char *
|
|
837 ngx_http_rewrite_variable(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf,
|
|
838 ngx_str_t *value)
|
|
839 {
|
58
|
840 ngx_int_t index;
|
|
841 ngx_http_script_code_pt *code;
|
|
842 ngx_http_script_var_code_t *var_code;
|
50
|
843
|
|
844 value->len--;
|
|
845 value->data++;
|
|
846
|
|
847 if (value->len == sizeof("invalid_referer") - 1
|
|
848 && ngx_strncmp(value->data, "invalid_referer",
|
|
849 sizeof("invalid_referer") - 1) == 0)
|
|
850 {
|
58
|
851 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
852 sizeof(ngx_http_script_code_pt));
|
50
|
853 if (code == NULL) {
|
|
854 return NGX_CONF_ERROR;
|
|
855 }
|
|
856
|
|
857 *code = ngx_http_rewrite_invalid_referer_code;
|
|
858
|
|
859 } else {
|
58
|
860 index = ngx_http_get_variable_index(cf, value);
|
50
|
861
|
58
|
862 if (index == NGX_ERROR) {
|
50
|
863 return NGX_CONF_ERROR;
|
|
864 }
|
|
865
|
58
|
866 var_code = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
867 sizeof(ngx_http_script_var_code_t));
|
50
|
868 if (var_code == NULL) {
|
|
869 return NGX_CONF_ERROR;
|
|
870 }
|
|
871
|
58
|
872 var_code->code = ngx_http_script_var_code;
|
|
873 var_code->index = index;
|
50
|
874 }
|
|
875
|
|
876 return NGX_CONF_OK;
|
|
877 }
|
|
878
|
|
879
|
|
880 static char *
|
|
881 ngx_http_rewrite_valid_referers(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
882 {
|
|
883 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
884
|
|
885 ngx_uint_t i, server_names;
|
|
886 ngx_str_t *value;
|
|
887 ngx_http_server_name_t *sn;
|
|
888 ngx_http_core_srv_conf_t *cscf;
|
|
889 ngx_http_rewrite_referer_t *ref;
|
|
890
|
|
891 cscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_core_module);
|
|
892
|
|
893 if (lcf->referers == NULL) {
|
|
894 lcf->referers = ngx_array_create(cf->pool,
|
|
895 cf->args->nelts + cscf->server_names.nelts,
|
|
896 sizeof(ngx_http_rewrite_referer_t));
|
|
897 if (lcf->referers == NULL) {
|
|
898 return NGX_CONF_ERROR;
|
|
899 }
|
|
900 }
|
|
901
|
|
902 value = cf->args->elts;
|
|
903 server_names = 0;
|
|
904
|
|
905 for (i = 1; i < cf->args->nelts; i++) {
|
|
906 if (value[i].len == 0) {
|
|
907 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
908 "invalid referer \"%V\"", &value[i]);
|
|
909 return NGX_CONF_ERROR;
|
|
910 }
|
|
911
|
|
912 if (ngx_strcmp(value[i].data, "none") == 0) {
|
|
913 lcf->no_referer = 1;
|
|
914 continue;
|
|
915 }
|
|
916
|
54
|
917 if (ngx_strcmp(value[i].data, "blocked") == 0) {
|
|
918 lcf->blocked_referer = 1;
|
|
919 continue;
|
|
920 }
|
|
921
|
50
|
922 if (ngx_strcmp(value[i].data, "server_names") == 0) {
|
|
923 server_names = 1;
|
|
924 continue;
|
|
925 }
|
|
926
|
|
927 ref = ngx_array_push(lcf->referers);
|
|
928 if (ref == NULL) {
|
|
929 return NGX_CONF_ERROR;
|
|
930 }
|
|
931
|
|
932 if (value[i].data[0] != '*') {
|
|
933 ref->name = value[i];
|
|
934 ref->wildcard = 0;
|
|
935 continue;
|
|
936 }
|
|
937
|
|
938 if (value[i].data[1] != '.') {
|
|
939 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
940 "invalid wildcard referer \"%V\"", &value[i]);
|
|
941 return NGX_CONF_ERROR;
|
|
942 }
|
|
943
|
|
944 ref->name.len = value[i].len - 1;
|
|
945 ref->name.data = value[i].data + 1;
|
|
946 ref->wildcard = 1;
|
|
947 }
|
|
948
|
|
949 if (!server_names) {
|
|
950 return NGX_CONF_OK;
|
|
951 }
|
|
952
|
|
953 sn = cscf->server_names.elts;
|
|
954 for (i = 0; i < cscf->server_names.nelts; i++) {
|
|
955 ref = ngx_array_push(lcf->referers);
|
|
956 if (ref == NULL) {
|
|
957 return NGX_CONF_ERROR;
|
|
958 }
|
|
959
|
|
960 ref->name.len = sn[i].name.len + 1;
|
|
961 ref->name.data = ngx_palloc(cf->pool, ref->name.len);
|
|
962 if (ref->name.data == NULL) {
|
|
963 return NGX_CONF_ERROR;
|
|
964 }
|
|
965
|
|
966 ngx_memcpy(ref->name.data, sn[i].name.data, sn[i].name.len);
|
|
967 ref->name.data[sn[i].name.len] = '/';
|
|
968 ref->wildcard = sn[i].wildcard;
|
|
969 }
|
|
970
|
|
971 return NGX_CONF_OK;
|
|
972 }
|
|
973
|
|
974
|
|
975 static char *
|
|
976 ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
977 {
|
|
978 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
979
|
58
|
980 ngx_int_t n, index;
|
|
981 ngx_str_t *value;
|
|
982 ngx_http_variable_t *v;
|
|
983 ngx_http_script_var_code_t *var;
|
|
984 ngx_http_script_value_code_t *val;
|
50
|
985
|
|
986 value = cf->args->elts;
|
|
987
|
|
988 if (value[1].data[0] != '$') {
|
|
989 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
990 "invalid variable name \"%V\"", &value[1]);
|
|
991 return NGX_CONF_ERROR;
|
|
992 }
|
|
993
|
|
994 value[1].len--;
|
|
995 value[1].data++;
|
|
996
|
58
|
997 v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGABLE);
|
50
|
998 if (v == NULL) {
|
|
999 return NGX_CONF_ERROR;
|
|
1000 }
|
|
1001
|
58
|
1002 index = ngx_http_get_variable_index(cf, &value[1]);
|
|
1003 if (index == NGX_ERROR) {
|
|
1004 return NGX_CONF_ERROR;
|
|
1005 }
|
50
|
1006
|
58
|
1007 v->handler = ngx_http_rewrite_var;
|
|
1008 v->data = index;
|
|
1009
|
|
1010 val = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
1011 sizeof(ngx_http_script_value_code_t));
|
50
|
1012 if (val == NULL) {
|
|
1013 return NGX_CONF_ERROR;
|
|
1014 }
|
|
1015
|
|
1016 n = ngx_atoi(value[2].data, value[2].len);
|
|
1017
|
|
1018 if (n == NGX_ERROR) {
|
|
1019 n = 0;
|
|
1020 }
|
|
1021
|
58
|
1022 val->code = ngx_http_script_value_code;
|
50
|
1023 val->value = (uintptr_t) n;
|
|
1024 val->text_len = (uintptr_t) value[2].len;
|
|
1025 val->text_data = (uintptr_t) value[2].data;
|
|
1026
|
58
|
1027 var = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
1028 sizeof(ngx_http_script_var_code_t));
|
50
|
1029 if (var == NULL) {
|
|
1030 return NGX_CONF_ERROR;
|
|
1031 }
|
|
1032
|
58
|
1033 var->code = ngx_http_script_set_var_code;
|
|
1034 var->index = (uintptr_t) index;
|
50
|
1035
|
|
1036 return NGX_CONF_OK;
|
|
1037 }
|