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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_array_t *codes; /* uintptr_t */
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20 ngx_array_t *referers; /* ngx_http_rewrite_referer_t */
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50
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21
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64
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22 ngx_uint_t captures;
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58
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23 ngx_uint_t stack_size;
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24
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58
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25 ngx_flag_t log;
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26
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27 ngx_flag_t no_referer;
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28 ngx_flag_t blocked_referer;
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50
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29 } ngx_http_rewrite_loc_conf_t;
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30
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31
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32 static void *ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf);
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33 static char *ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf,
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34 void *parent, void *child);
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58
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35 static ngx_int_t ngx_http_rewrite_init(ngx_cycle_t *cycle);
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50
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36 static char *ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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37 static char *ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd,
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38 void *conf);
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76
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39 static char *ngx_http_rewrite_break(ngx_conf_t *cf, ngx_command_t *cmd,
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40 void *conf);
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50
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41 static char *ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd,
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42 void *conf);
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43 static char * ngx_http_rewrite_if_condition(ngx_conf_t *cf,
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44 ngx_http_rewrite_loc_conf_t *lcf);
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45 static char *ngx_http_rewrite_variable(ngx_conf_t *cf,
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46 ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value);
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47 static char *ngx_http_rewrite_valid_referers(ngx_conf_t *cf,
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48 ngx_command_t *cmd, void *conf);
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58
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49 static char *ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd,
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50
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50 void *conf);
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51
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52
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53 static ngx_command_t ngx_http_rewrite_commands[] = {
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54
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55 { ngx_string("rewrite"),
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56 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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57 |NGX_CONF_TAKE23,
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58 ngx_http_rewrite,
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59 NGX_HTTP_LOC_CONF_OFFSET,
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60 0,
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61 NULL },
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62
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63 { ngx_string("return"),
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64 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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65 |NGX_CONF_TAKE1,
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66 ngx_http_rewrite_return,
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67 NGX_HTTP_LOC_CONF_OFFSET,
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68 0,
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69 NULL },
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70
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76
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71 { ngx_string("break"),
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72 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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73 |NGX_CONF_NOARGS,
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74 ngx_http_rewrite_break,
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75 NGX_HTTP_LOC_CONF_OFFSET,
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76 0,
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77 NULL },
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78
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50
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79 { ngx_string("if"),
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80 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_1MORE,
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81 ngx_http_rewrite_if,
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82 NGX_HTTP_LOC_CONF_OFFSET,
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83 0,
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84 NULL },
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85
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86 { ngx_string("valid_referers"),
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87 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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88 ngx_http_rewrite_valid_referers,
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89 NGX_HTTP_LOC_CONF_OFFSET,
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90 0,
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91 NULL },
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92
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93 { ngx_string("set"),
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94 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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95 |NGX_CONF_TAKE2,
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96 ngx_http_rewrite_set,
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97 NGX_HTTP_LOC_CONF_OFFSET,
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98 0,
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99 NULL },
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100
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101 { ngx_string("rewrite_log"),
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102 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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103 |NGX_CONF_TAKE1,
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104 ngx_conf_set_flag_slot,
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105 NGX_HTTP_LOC_CONF_OFFSET,
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106 offsetof(ngx_http_rewrite_loc_conf_t, log),
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107 NULL },
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108
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109 ngx_null_command
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110 };
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111
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112
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113 ngx_http_module_t ngx_http_rewrite_module_ctx = {
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114 NULL, /* preconfiguration */
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115 NULL, /* postconfiguration */
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116
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117 NULL, /* create main configuration */
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118 NULL, /* init main configuration */
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119
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120 NULL, /* create server configuration */
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121 NULL, /* merge server configuration */
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122
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123 ngx_http_rewrite_create_loc_conf, /* create location configration */
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124 ngx_http_rewrite_merge_loc_conf /* merge location configration */
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125 };
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126
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127
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128 ngx_module_t ngx_http_rewrite_module = {
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58
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129 NGX_MODULE_V1,
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130 &ngx_http_rewrite_module_ctx, /* module context */
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131 ngx_http_rewrite_commands, /* module directives */
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132 NGX_HTTP_MODULE, /* module type */
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90
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133 NULL, /* init master */
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134 ngx_http_rewrite_init, /* init module */
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135 NULL, /* init process */
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136 NULL, /* init thread */
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137 NULL, /* exit thread */
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138 NULL, /* exit process */
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139 NULL, /* exit master */
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140 NGX_MODULE_V1_PADDING
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50
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141 };
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142
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143
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144 static ngx_http_variable_value_t ngx_http_rewrite_null_value =
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58
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145 { 0, ngx_string("") };
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50
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146
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147
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148 static ngx_int_t
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149 ngx_http_rewrite_handler(ngx_http_request_t *r)
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150 {
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151 ngx_http_script_code_pt code;
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152 ngx_http_script_engine_t *e;
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153 ngx_http_rewrite_loc_conf_t *cf;
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154
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155 cf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
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156
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157 if (cf->codes == NULL) {
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158 return NGX_DECLINED;
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159 }
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160
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161 e = ngx_pcalloc(r->pool, sizeof(ngx_http_script_engine_t));
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162 if (e == NULL) {
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163 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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164 }
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165
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166 e->sp = ngx_pcalloc(r->pool,
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167 cf->stack_size * sizeof(ngx_http_variable_value_t));
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168 if (e->sp == NULL) {
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169 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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170 }
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171
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172 if (cf->captures) {
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173 e->captures = ngx_palloc(r->pool, cf->captures * sizeof(int));
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50
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174 if (e->captures == NULL) {
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175 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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176 }
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177
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178 } else {
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179 e->captures = NULL;
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180 }
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181
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182 e->ip = cf->codes->elts;
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183 e->request = r;
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184 e->quote = 1;
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185 e->log = cf->log;
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186 e->status = NGX_DECLINED;
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187
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188 while (*(uintptr_t *) e->ip) {
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189 code = *(ngx_http_script_code_pt *) e->ip;
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190 code(e);
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191 }
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192
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193 return e->status;
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194 }
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195
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196
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197 static void
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198 ngx_http_rewrite_invalid_referer_code(ngx_http_script_engine_t *e)
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199 {
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200 u_char *ref;
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201 size_t len;
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202 ngx_uint_t i, n;
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203 ngx_http_request_t *r;
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204 ngx_http_rewrite_referer_t *refs;
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205 ngx_http_rewrite_loc_conf_t *cf;
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206
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207 r = e->request;
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208
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209 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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210 "http rewrite invalid referer");
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211
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212 cf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
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213
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214 e->ip += sizeof(uintptr_t);
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215
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216 if (cf->referers == NULL) {
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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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223 }
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224
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225 if (r->headers_in.referer == NULL) {
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226 if (cf->no_referer) {
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227 e->sp->value = 0;
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228 e->sp->text.len = 0;
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229 e->sp->text.data = (u_char *) "";
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230 e->sp++;
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231
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232 return;
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233
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50
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234 } else {
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235 e->sp->value = 1;
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236 e->sp->text.len = 1;
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237 e->sp->text.data = (u_char *) "1";
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238 e->sp++;
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239
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240 return;
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241 }
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242 }
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243
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244 len = r->headers_in.referer->value.len;
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245 ref = r->headers_in.referer->value.data;
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246
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247 if (len < sizeof("http://i.ru") - 1
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248 || (ngx_strncasecmp(ref, "http://", 7) != 0))
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249 {
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250 if (cf->blocked_referer) {
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251 e->sp->value = 0;
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252 e->sp->text.len = 0;
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253 e->sp->text.data = (u_char *) "0";
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254 e->sp++;
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255
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256 return;
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257
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54
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258 } else {
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259 e->sp->value = 1;
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260 e->sp->text.len = 1;
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261 e->sp->text.data = (u_char *) "1";
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262 e->sp++;
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263
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264 return;
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265 }
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50
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266 }
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267
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268 len -= 7;
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269 ref += 7;
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270
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271 refs = cf->referers->elts;
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272 for (i = 0; i < cf->referers->nelts; i++ ){
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273
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274 if (refs[i].name.len > len) {
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275 continue;
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276 }
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277
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278 if (refs[i].wildcard) {
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279 for (n = 0; n < len; n++) {
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280 if (ref[n] == '/' || ref[n] == ':') {
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281 break;
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282 }
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283
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284 if (ref[n] != '.') {
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285 continue;
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286 }
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287
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288 if (ngx_strncmp(&ref[n], refs[i].name.data,
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289 refs[i].name.len) == 0)
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290 {
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291 e->sp->value = 0;
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292 e->sp->text.len = 0;
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293 e->sp->text.data = (u_char *) "";
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294 e->sp++;
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295
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296 return;
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297 }
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298 }
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299
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300 } else {
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301 if (ngx_strncasecmp(refs[i].name.data, ref, refs[i].name.len) == 0)
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302 {
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303 e->sp->value = 0;
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304 e->sp->text.len = 0;
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305 e->sp->text.data = (u_char *) "";
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306 e->sp++;
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307
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308 return;
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309 }
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310 }
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311 }
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312
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313 e->sp->value = 1;
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314 e->sp->text.len = 1;
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315 e->sp->text.data = (u_char *) "1";
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316 e->sp++;
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317 }
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318
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319
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320 static ngx_http_variable_value_t *
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321 ngx_http_rewrite_var(ngx_http_request_t *r, uintptr_t data)
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322 {
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323 ngx_http_variable_t *var;
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324 ngx_http_core_main_conf_t *cmcf;
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325
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326 cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
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327
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328 var = cmcf->variables.elts;
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329
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330 /*
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331 * the ngx_http_rewrite_module sets variables directly in r->variables,
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68
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332 * and they should be handled by ngx_http_get_indexed_variable(),
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333 * so the handler is called only if the variable is not initialized
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334 */
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335
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336 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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337 "using uninitialized \"%V\" variable", &var[data].name);
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338
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339 return &ngx_http_rewrite_null_value;
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340 }
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341
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342
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343 static void *
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344 ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf)
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345 {
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346 ngx_http_rewrite_loc_conf_t *conf;
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347
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348 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_rewrite_loc_conf_t));
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349 if (conf == NULL) {
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350 return NGX_CONF_ERROR;
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351 }
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352
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353 conf->stack_size = NGX_CONF_UNSET_UINT;
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354 conf->log = NGX_CONF_UNSET;
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355 conf->no_referer = NGX_CONF_UNSET;
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54
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356 conf->blocked_referer = NGX_CONF_UNSET;
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50
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357
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358 return conf;
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359 }
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360
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361
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362 static char *
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363 ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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364 {
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365 ngx_http_rewrite_loc_conf_t *prev = parent;
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366 ngx_http_rewrite_loc_conf_t *conf = child;
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367
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58
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368 uintptr_t *code;
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50
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369
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370 ngx_conf_merge_value(conf->log, prev->log, 0);
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371 ngx_conf_merge_unsigned_value(conf->stack_size, prev->stack_size, 10);
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372
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373 if (conf->referers == NULL) {
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374 conf->referers = prev->referers;
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375 ngx_conf_merge_value(conf->no_referer, prev->no_referer, 0);
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54
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376 ngx_conf_merge_value(conf->blocked_referer, prev->blocked_referer, 0);
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50
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377 }
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378
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379 if (conf->no_referer == NGX_CONF_UNSET) {
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380 conf->no_referer = 0;
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381 }
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382
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54
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383 if (conf->blocked_referer == NGX_CONF_UNSET) {
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384 conf->blocked_referer = 0;
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385 }
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386
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50
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387 if (conf->codes == NULL) {
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388 return NGX_CONF_OK;
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389 }
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390
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391 if (conf->codes == prev->codes) {
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392 return NGX_CONF_OK;
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393 }
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394
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395 code = ngx_array_push_n(conf->codes, sizeof(uintptr_t));
|
|
|
396 if (code == NULL) {
|
|
|
397 return NGX_CONF_ERROR;
|
|
|
398 }
|
|
|
399
|
|
|
400 *code = (uintptr_t) NULL;
|
|
|
401
|
|
|
402 return NGX_CONF_OK;
|
|
|
403 }
|
|
|
404
|
|
|
405
|
|
58
|
406 static ngx_int_t
|
|
|
407 ngx_http_rewrite_init(ngx_cycle_t *cycle)
|
|
|
408 {
|
|
|
409 ngx_http_handler_pt *h;
|
|
|
410 ngx_http_core_main_conf_t *cmcf;
|
|
|
411
|
|
|
412 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
|
413
|
|
|
414 h = ngx_array_push(&cmcf->phases[NGX_HTTP_REWRITE_PHASE].handlers);
|
|
|
415 if (h == NULL) {
|
|
|
416 return NGX_ERROR;
|
|
|
417 }
|
|
|
418
|
|
|
419 *h = ngx_http_rewrite_handler;
|
|
|
420
|
|
|
421 return NGX_OK;
|
|
|
422 }
|
|
|
423
|
|
|
424
|
|
50
|
425 static char *
|
|
|
426 ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
427 {
|
|
|
428 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
429
|
|
58
|
430 ngx_str_t *value, err;
|
|
|
431 ngx_int_t n;
|
|
|
432 ngx_uint_t last;
|
|
|
433 ngx_http_script_code_pt *code;
|
|
|
434 ngx_http_script_compile_t sc;
|
|
|
435 ngx_http_script_regex_code_t *regex;
|
|
|
436 ngx_http_script_regex_end_code_t *regex_end;
|
|
|
437 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
50
|
438
|
|
58
|
439 regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
440 sizeof(ngx_http_script_regex_code_t));
|
|
50
|
441 if (regex == NULL) {
|
|
|
442 return NGX_CONF_ERROR;
|
|
|
443 }
|
|
|
444
|
|
58
|
445 ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));
|
|
|
446
|
|
50
|
447 value = cf->args->elts;
|
|
|
448
|
|
|
449 err.len = NGX_MAX_CONF_ERRSTR;
|
|
|
450 err.data = errstr;
|
|
|
451
|
|
|
452 /* TODO: NGX_REGEX_CASELESS */
|
|
|
453
|
|
|
454 regex->regex = ngx_regex_compile(&value[1], 0, cf->pool, &err);
|
|
|
455
|
|
|
456 if (regex->regex == NULL) {
|
|
|
457 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s", err.data);
|
|
|
458 return NGX_CONF_ERROR;
|
|
|
459 }
|
|
|
460
|
|
58
|
461 regex->code = ngx_http_script_regex_start_code;
|
|
50
|
462 regex->uri = 1;
|
|
|
463 regex->name = value[1];
|
|
|
464
|
|
58
|
465 if (value[2].data[value[2].len - 1] == '?') {
|
|
|
466
|
|
|
467 /* the last "?" drops the original arguments */
|
|
|
468 value[2].len--;
|
|
|
469
|
|
|
470 } else {
|
|
|
471 regex->add_args = 1;
|
|
|
472 }
|
|
|
473
|
|
50
|
474 last = 0;
|
|
|
475
|
|
|
476 if (ngx_strncmp(value[2].data, "http://", sizeof("http://") - 1) == 0) {
|
|
|
477 regex->status = NGX_HTTP_MOVED_TEMPORARILY;
|
|
|
478 regex->redirect = 1;
|
|
|
479 last = 1;
|
|
|
480 }
|
|
|
481
|
|
|
482 if (cf->args->nelts == 4) {
|
|
|
483 if (ngx_strcmp(value[3].data, "last") == 0) {
|
|
|
484 last = 1;
|
|
|
485
|
|
|
486 } else if (ngx_strcmp(value[3].data, "break") == 0) {
|
|
|
487 regex->break_cycle = 1;
|
|
|
488 last = 1;
|
|
|
489
|
|
|
490 } else if (ngx_strcmp(value[3].data, "redirect") == 0) {
|
|
|
491 regex->status = NGX_HTTP_MOVED_TEMPORARILY;
|
|
|
492 regex->redirect = 1;
|
|
|
493 last = 1;
|
|
|
494
|
|
|
495 } else if (ngx_strcmp(value[3].data, "permanent") == 0) {
|
|
|
496 regex->status = NGX_HTTP_MOVED_PERMANENTLY;
|
|
|
497 regex->redirect = 1;
|
|
|
498 last = 1;
|
|
|
499
|
|
|
500 } else {
|
|
|
501 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
502 "invalid parameter \"%V\"", &value[3]);
|
|
|
503 return NGX_CONF_ERROR;
|
|
|
504 }
|
|
|
505 }
|
|
|
506
|
|
58
|
507 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
50
|
508
|
|
58
|
509 sc.cf = cf;
|
|
|
510 sc.source = &value[2];
|
|
|
511 sc.lengths = ®ex->lengths;
|
|
|
512 sc.values = &lcf->codes;
|
|
|
513 sc.variables = ngx_http_script_variables_count(&value[2]);
|
|
|
514 sc.main = regex;
|
|
|
515 sc.complete_lengths = 1;
|
|
|
516 sc.compile_args = !regex->redirect;
|
|
50
|
517
|
|
58
|
518 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
519 return NGX_CONF_ERROR;
|
|
|
520 }
|
|
50
|
521
|
|
58
|
522 regex = sc.main;
|
|
50
|
523
|
|
58
|
524 regex->ncaptures = sc.ncaptures;
|
|
|
525 regex->size = sc.size;
|
|
|
526 regex->args = sc.args;
|
|
50
|
527
|
|
58
|
528 if (sc.variables == 0) {
|
|
|
529 regex->lengths = NULL;
|
|
50
|
530 }
|
|
|
531
|
|
|
532 n = ngx_regex_capture_count(regex->regex);
|
|
|
533
|
|
|
534 if (n < 0) {
|
|
|
535 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
536 ngx_regex_capture_count_n " failed for "
|
|
|
537 "pattern \"%V\"", &value[1]);
|
|
|
538 return NGX_CONF_ERROR;
|
|
|
539 }
|
|
|
540
|
|
|
541 if (regex->ncaptures > (ngx_uint_t) n) {
|
|
|
542 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
543 "pattern \"%V\" has less captures "
|
|
|
544 "than referrenced in substitution \"%V\"",
|
|
|
545 &value[1], &value[2]);
|
|
|
546 return NGX_CONF_ERROR;
|
|
|
547 }
|
|
|
548
|
|
|
549 if (regex->ncaptures < (ngx_uint_t) n) {
|
|
|
550 regex->ncaptures = (ngx_uint_t) n;
|
|
|
551 }
|
|
|
552
|
|
|
553 if (regex->ncaptures) {
|
|
|
554 regex->ncaptures = (regex->ncaptures + 1) * 3;
|
|
|
555
|
|
64
|
556 if (lcf->captures < regex->ncaptures) {
|
|
|
557 lcf->captures = regex->ncaptures;
|
|
|
558 }
|
|
58
|
559 }
|
|
|
560
|
|
|
561 regex_end = ngx_http_script_add_code(lcf->codes,
|
|
|
562 sizeof(ngx_http_script_regex_end_code_t),
|
|
|
563 ®ex);
|
|
50
|
564 if (regex_end == NULL) {
|
|
|
565 return NGX_CONF_ERROR;
|
|
|
566 }
|
|
|
567
|
|
58
|
568 regex_end->code = ngx_http_script_regex_end_code;
|
|
50
|
569 regex_end->uri = regex->uri;
|
|
|
570 regex_end->args = regex->args;
|
|
58
|
571 regex_end->add_args = regex->add_args;
|
|
50
|
572 regex_end->redirect = regex->redirect;
|
|
|
573
|
|
|
574 if (last) {
|
|
66
|
575 code = ngx_http_script_add_code(lcf->codes, sizeof(uintptr_t), ®ex);
|
|
50
|
576 if (code == NULL) {
|
|
|
577 return NGX_CONF_ERROR;
|
|
|
578 }
|
|
|
579
|
|
|
580 *code = (uintptr_t) NULL;
|
|
|
581 }
|
|
|
582
|
|
|
583 regex->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
|
|
|
584 - (u_char *) regex;
|
|
|
585
|
|
|
586 return NGX_CONF_OK;
|
|
|
587 }
|
|
|
588
|
|
|
589
|
|
|
590 static char *
|
|
|
591 ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
592 {
|
|
|
593 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
594
|
|
58
|
595 ngx_str_t *value;
|
|
|
596 ngx_http_script_return_code_t *ret;
|
|
50
|
597
|
|
58
|
598 ret = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
599 sizeof(ngx_http_script_return_code_t));
|
|
50
|
600 if (ret == NULL) {
|
|
|
601 return NGX_CONF_ERROR;
|
|
|
602 }
|
|
|
603
|
|
|
604 value = cf->args->elts;
|
|
|
605
|
|
58
|
606 ret->code = ngx_http_script_return_code;
|
|
50
|
607 ret->null = (uintptr_t) NULL;
|
|
|
608
|
|
|
609 ret->status = ngx_atoi(value[1].data, value[1].len);
|
|
|
610
|
|
|
611 if (ret->status == (uintptr_t) NGX_ERROR) {
|
|
|
612 return NGX_CONF_ERROR;
|
|
|
613 }
|
|
|
614
|
|
|
615 return NGX_CONF_OK;
|
|
|
616 }
|
|
|
617
|
|
|
618
|
|
|
619 static char *
|
|
76
|
620 ngx_http_rewrite_break(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
621 {
|
|
|
622 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
623
|
|
|
624 ngx_http_script_code_pt *code;
|
|
|
625
|
|
|
626 code = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(uintptr_t));
|
|
|
627 if (code == NULL) {
|
|
|
628 return NGX_CONF_ERROR;
|
|
|
629 }
|
|
|
630
|
|
|
631 *code = ngx_http_script_break_code;
|
|
|
632
|
|
|
633 return NGX_CONF_OK;
|
|
|
634 }
|
|
|
635
|
|
|
636
|
|
|
637 static char *
|
|
50
|
638 ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
639 {
|
|
|
640 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
641
|
|
|
642 void *mconf;
|
|
|
643 char *rv;
|
|
|
644 u_char *elts;
|
|
|
645 ngx_uint_t i;
|
|
|
646 ngx_conf_t save;
|
|
|
647 ngx_http_module_t *module;
|
|
|
648 ngx_http_conf_ctx_t *ctx, *pctx;
|
|
|
649 ngx_http_core_loc_conf_t *clcf, *pclcf, **clcfp;
|
|
58
|
650 ngx_http_script_if_code_t *if_code;
|
|
50
|
651 ngx_http_rewrite_loc_conf_t *nlcf;
|
|
|
652
|
|
|
653 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t));
|
|
|
654 if (ctx == NULL) {
|
|
|
655 return NGX_CONF_ERROR;
|
|
|
656 }
|
|
|
657
|
|
|
658 pctx = cf->ctx;
|
|
|
659 ctx->main_conf = pctx->main_conf;
|
|
|
660 ctx->srv_conf = pctx->srv_conf;
|
|
|
661
|
|
|
662 ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
|
|
|
663 if (ctx->loc_conf == NULL) {
|
|
|
664 return NGX_CONF_ERROR;
|
|
|
665 }
|
|
|
666
|
|
|
667 for (i = 0; ngx_modules[i]; i++) {
|
|
|
668 if (ngx_modules[i]->type != NGX_HTTP_MODULE) {
|
|
|
669 continue;
|
|
|
670 }
|
|
|
671
|
|
|
672 module = ngx_modules[i]->ctx;
|
|
|
673
|
|
|
674 if (module->create_loc_conf) {
|
|
|
675
|
|
|
676 mconf = module->create_loc_conf(cf);
|
|
|
677 if (mconf == NULL) {
|
|
|
678 return NGX_CONF_ERROR;
|
|
|
679 }
|
|
|
680
|
|
|
681 ctx->loc_conf[ngx_modules[i]->ctx_index] = mconf;
|
|
|
682 }
|
|
|
683 }
|
|
|
684
|
|
|
685 pclcf = pctx->loc_conf[ngx_http_core_module.ctx_index];
|
|
|
686
|
|
|
687 clcf = ctx->loc_conf[ngx_http_core_module.ctx_index];
|
|
|
688 clcf->loc_conf = ctx->loc_conf;
|
|
|
689 clcf->name = pclcf->name;
|
|
|
690 clcf->noname = 1;
|
|
|
691
|
|
|
692 if (pclcf->locations.elts == NULL) {
|
|
|
693 if (ngx_array_init(&pclcf->locations, cf->pool, 4, sizeof(void *))
|
|
104
|
694 == NGX_ERROR)
|
|
50
|
695 {
|
|
|
696 return NGX_CONF_ERROR;
|
|
|
697 }
|
|
|
698 }
|
|
|
699
|
|
|
700 clcfp = ngx_array_push(&pclcf->locations);
|
|
|
701 if (clcfp == NULL) {
|
|
|
702 return NGX_CONF_ERROR;
|
|
|
703 }
|
|
|
704
|
|
|
705 *clcfp = clcf;
|
|
|
706
|
|
|
707
|
|
|
708 if (ngx_http_rewrite_if_condition(cf, lcf) != NGX_CONF_OK) {
|
|
|
709 return NGX_CONF_ERROR;
|
|
|
710 }
|
|
|
711
|
|
58
|
712 if_code = ngx_array_push_n(lcf->codes, sizeof(ngx_http_script_if_code_t));
|
|
50
|
713 if (if_code == NULL) {
|
|
|
714 return NULL;
|
|
|
715 }
|
|
|
716
|
|
58
|
717 if_code->code = ngx_http_script_if_code;
|
|
50
|
718
|
|
|
719 elts = lcf->codes->elts;
|
|
|
720
|
|
|
721
|
|
|
722 /* the inside directives must compile to the same code array */
|
|
|
723
|
|
|
724 nlcf = ctx->loc_conf[ngx_http_rewrite_module.ctx_index];
|
|
|
725 nlcf->codes = lcf->codes;
|
|
|
726
|
|
|
727
|
|
|
728 save = *cf;
|
|
|
729 cf->ctx = ctx;
|
|
|
730
|
|
|
731 if (pclcf->name.len == 0) {
|
|
|
732 if_code->loc_conf = NULL;
|
|
|
733 cf->cmd_type = NGX_HTTP_SIF_CONF;
|
|
|
734
|
|
|
735 } else {
|
|
|
736 if_code->loc_conf = ctx->loc_conf;
|
|
|
737 cf->cmd_type = NGX_HTTP_LIF_CONF;
|
|
|
738 }
|
|
|
739
|
|
|
740 rv = ngx_conf_parse(cf, NULL);
|
|
|
741
|
|
|
742 *cf = save;
|
|
|
743
|
|
|
744 if (rv != NGX_CONF_OK) {
|
|
|
745 return rv;
|
|
|
746 }
|
|
|
747
|
|
|
748
|
|
66
|
749 if (lcf->captures < nlcf->captures) {
|
|
|
750 lcf->captures = nlcf->captures;
|
|
|
751 }
|
|
|
752
|
|
|
753
|
|
50
|
754 if (elts != lcf->codes->elts) {
|
|
58
|
755 if_code = (ngx_http_script_if_code_t *)
|
|
50
|
756 ((u_char *) if_code + ((u_char *) lcf->codes->elts - elts));
|
|
|
757 }
|
|
|
758
|
|
|
759 if_code->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
|
|
|
760 - (u_char *) if_code;
|
|
|
761
|
|
104
|
762 /* the code array belong to parent block */
|
|
|
763
|
|
|
764 nlcf->codes = NULL;
|
|
|
765
|
|
50
|
766 return NGX_CONF_OK;
|
|
|
767 }
|
|
|
768
|
|
|
769
|
|
|
770 static char *
|
|
|
771 ngx_http_rewrite_if_condition(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf)
|
|
|
772 {
|
|
58
|
773 ngx_str_t *value, err;
|
|
64
|
774 ngx_uint_t cur, last, n;
|
|
58
|
775 ngx_http_script_regex_code_t *regex;
|
|
|
776 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
50
|
777
|
|
|
778 value = cf->args->elts;
|
|
|
779 last = cf->args->nelts - 1;
|
|
|
780
|
|
|
781 if (value[1].len < 1 || value[1].data[0] != '(') {
|
|
|
782 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
783 "invalid condition \"%V\"", &value[1]);
|
|
|
784 return NGX_CONF_ERROR;
|
|
|
785 }
|
|
|
786
|
|
|
787 if (value[1].len == 1) {
|
|
|
788 cur = 2;
|
|
|
789
|
|
|
790 } else {
|
|
|
791 cur = 1;
|
|
|
792 value[1].len--;
|
|
|
793 value[1].data++;
|
|
|
794 }
|
|
|
795
|
|
|
796 if (value[last].len < 1 || value[last].data[value[last].len - 1] != ')') {
|
|
|
797 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
798 "invalid condition \"%V\"", &value[last]);
|
|
|
799 return NGX_CONF_ERROR;
|
|
|
800 }
|
|
|
801
|
|
|
802 if (value[last].len == 1) {
|
|
|
803 last--;
|
|
|
804
|
|
|
805 } else {
|
|
|
806 value[last].len--;
|
|
|
807 value[last].data[value[last].len] = '\0';
|
|
|
808 }
|
|
|
809
|
|
|
810 if (value[cur].len > 1 && value[cur].data[0] == '$') {
|
|
|
811
|
|
|
812 if (cur != last && cur + 2 != last) {
|
|
|
813 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
814 "invalid condition \"%V\"", &value[cur]);
|
|
|
815 return NGX_CONF_ERROR;
|
|
|
816 }
|
|
|
817
|
|
|
818 if (ngx_http_rewrite_variable(cf, lcf, &value[cur])!= NGX_CONF_OK) {
|
|
|
819 return NGX_CONF_ERROR;
|
|
|
820 }
|
|
|
821
|
|
|
822 if (cur == last) {
|
|
|
823 return NGX_CONF_OK;
|
|
|
824 }
|
|
|
825
|
|
|
826 cur++;
|
|
|
827
|
|
|
828 if ((value[cur].len == 1 && value[cur].data[0] != '~')
|
|
|
829 || (value[cur].len == 2
|
|
|
830 && value[cur].data[0] != '~' && value[cur].data[1] != '*'))
|
|
|
831 {
|
|
|
832 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
833 "unexpected \"%V\" in condition", &value[cur]);
|
|
|
834 return NGX_CONF_ERROR;
|
|
|
835 }
|
|
|
836
|
|
58
|
837 regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
838 sizeof(ngx_http_script_regex_code_t));
|
|
50
|
839 if (regex == NULL) {
|
|
|
840 return NGX_CONF_ERROR;
|
|
|
841 }
|
|
|
842
|
|
58
|
843 ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));
|
|
|
844
|
|
50
|
845 err.len = NGX_MAX_CONF_ERRSTR;
|
|
|
846 err.data = errstr;
|
|
|
847
|
|
|
848 regex->regex = ngx_regex_compile(&value[last],
|
|
|
849 (value[cur].len == 2) ? NGX_REGEX_CASELESS : 0,
|
|
|
850 cf->pool, &err);
|
|
|
851
|
|
|
852 if (regex->regex == NULL) {
|
|
|
853 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s", err.data);
|
|
|
854 return NGX_CONF_ERROR;
|
|
|
855 }
|
|
|
856
|
|
58
|
857 regex->code = ngx_http_script_regex_start_code;
|
|
|
858 regex->next = sizeof(ngx_http_script_regex_code_t);
|
|
50
|
859 regex->test = 1;
|
|
|
860 regex->name = value[last];
|
|
|
861
|
|
64
|
862 n = ngx_regex_capture_count(regex->regex);
|
|
|
863
|
|
|
864 if (n) {
|
|
|
865 regex->ncaptures = (n + 1) * 3;
|
|
|
866
|
|
|
867 if (lcf->captures < regex->ncaptures) {
|
|
|
868 lcf->captures = regex->ncaptures;
|
|
|
869 }
|
|
|
870 }
|
|
|
871
|
|
50
|
872 return NGX_CONF_OK;
|
|
|
873 }
|
|
|
874
|
|
|
875 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
876 "invalid condition \"%V\"", &value[cur]);
|
|
|
877
|
|
|
878 return NGX_CONF_ERROR;
|
|
|
879 }
|
|
|
880
|
|
|
881
|
|
|
882 static char *
|
|
|
883 ngx_http_rewrite_variable(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf,
|
|
|
884 ngx_str_t *value)
|
|
|
885 {
|
|
58
|
886 ngx_int_t index;
|
|
|
887 ngx_http_script_code_pt *code;
|
|
|
888 ngx_http_script_var_code_t *var_code;
|
|
50
|
889
|
|
|
890 value->len--;
|
|
|
891 value->data++;
|
|
|
892
|
|
|
893 if (value->len == sizeof("invalid_referer") - 1
|
|
|
894 && ngx_strncmp(value->data, "invalid_referer",
|
|
|
895 sizeof("invalid_referer") - 1) == 0)
|
|
|
896 {
|
|
58
|
897 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
898 sizeof(ngx_http_script_code_pt));
|
|
50
|
899 if (code == NULL) {
|
|
|
900 return NGX_CONF_ERROR;
|
|
|
901 }
|
|
|
902
|
|
|
903 *code = ngx_http_rewrite_invalid_referer_code;
|
|
|
904
|
|
|
905 } else {
|
|
58
|
906 index = ngx_http_get_variable_index(cf, value);
|
|
50
|
907
|
|
58
|
908 if (index == NGX_ERROR) {
|
|
50
|
909 return NGX_CONF_ERROR;
|
|
|
910 }
|
|
|
911
|
|
58
|
912 var_code = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
913 sizeof(ngx_http_script_var_code_t));
|
|
50
|
914 if (var_code == NULL) {
|
|
|
915 return NGX_CONF_ERROR;
|
|
|
916 }
|
|
|
917
|
|
58
|
918 var_code->code = ngx_http_script_var_code;
|
|
|
919 var_code->index = index;
|
|
50
|
920 }
|
|
|
921
|
|
|
922 return NGX_CONF_OK;
|
|
|
923 }
|
|
|
924
|
|
|
925
|
|
|
926 static char *
|
|
|
927 ngx_http_rewrite_valid_referers(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
928 {
|
|
|
929 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
930
|
|
|
931 ngx_uint_t i, server_names;
|
|
|
932 ngx_str_t *value;
|
|
|
933 ngx_http_server_name_t *sn;
|
|
|
934 ngx_http_core_srv_conf_t *cscf;
|
|
|
935 ngx_http_rewrite_referer_t *ref;
|
|
|
936
|
|
|
937 cscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_core_module);
|
|
|
938
|
|
|
939 if (lcf->referers == NULL) {
|
|
|
940 lcf->referers = ngx_array_create(cf->pool,
|
|
|
941 cf->args->nelts + cscf->server_names.nelts,
|
|
|
942 sizeof(ngx_http_rewrite_referer_t));
|
|
|
943 if (lcf->referers == NULL) {
|
|
|
944 return NGX_CONF_ERROR;
|
|
|
945 }
|
|
|
946 }
|
|
|
947
|
|
|
948 value = cf->args->elts;
|
|
|
949 server_names = 0;
|
|
|
950
|
|
|
951 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
952 if (value[i].len == 0) {
|
|
|
953 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
954 "invalid referer \"%V\"", &value[i]);
|
|
|
955 return NGX_CONF_ERROR;
|
|
|
956 }
|
|
|
957
|
|
|
958 if (ngx_strcmp(value[i].data, "none") == 0) {
|
|
|
959 lcf->no_referer = 1;
|
|
|
960 continue;
|
|
|
961 }
|
|
|
962
|
|
54
|
963 if (ngx_strcmp(value[i].data, "blocked") == 0) {
|
|
|
964 lcf->blocked_referer = 1;
|
|
|
965 continue;
|
|
|
966 }
|
|
|
967
|
|
50
|
968 if (ngx_strcmp(value[i].data, "server_names") == 0) {
|
|
|
969 server_names = 1;
|
|
|
970 continue;
|
|
|
971 }
|
|
|
972
|
|
|
973 ref = ngx_array_push(lcf->referers);
|
|
|
974 if (ref == NULL) {
|
|
|
975 return NGX_CONF_ERROR;
|
|
|
976 }
|
|
|
977
|
|
|
978 if (value[i].data[0] != '*') {
|
|
|
979 ref->name = value[i];
|
|
|
980 ref->wildcard = 0;
|
|
|
981 continue;
|
|
|
982 }
|
|
|
983
|
|
|
984 if (value[i].data[1] != '.') {
|
|
|
985 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
986 "invalid wildcard referer \"%V\"", &value[i]);
|
|
|
987 return NGX_CONF_ERROR;
|
|
|
988 }
|
|
|
989
|
|
|
990 ref->name.len = value[i].len - 1;
|
|
|
991 ref->name.data = value[i].data + 1;
|
|
|
992 ref->wildcard = 1;
|
|
|
993 }
|
|
|
994
|
|
|
995 if (!server_names) {
|
|
|
996 return NGX_CONF_OK;
|
|
|
997 }
|
|
|
998
|
|
|
999 sn = cscf->server_names.elts;
|
|
|
1000 for (i = 0; i < cscf->server_names.nelts; i++) {
|
|
|
1001 ref = ngx_array_push(lcf->referers);
|
|
|
1002 if (ref == NULL) {
|
|
|
1003 return NGX_CONF_ERROR;
|
|
|
1004 }
|
|
|
1005
|
|
|
1006 ref->name.len = sn[i].name.len + 1;
|
|
|
1007 ref->name.data = ngx_palloc(cf->pool, ref->name.len);
|
|
|
1008 if (ref->name.data == NULL) {
|
|
|
1009 return NGX_CONF_ERROR;
|
|
|
1010 }
|
|
|
1011
|
|
|
1012 ngx_memcpy(ref->name.data, sn[i].name.data, sn[i].name.len);
|
|
|
1013 ref->name.data[sn[i].name.len] = '/';
|
|
|
1014 ref->wildcard = sn[i].wildcard;
|
|
|
1015 }
|
|
|
1016
|
|
|
1017 return NGX_CONF_OK;
|
|
|
1018 }
|
|
|
1019
|
|
|
1020
|
|
|
1021 static char *
|
|
|
1022 ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
1023 {
|
|
|
1024 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
1025
|
|
64
|
1026 ngx_int_t n, index;
|
|
|
1027 ngx_str_t *value;
|
|
|
1028 ngx_http_variable_t *v;
|
|
|
1029 ngx_http_script_compile_t sc;
|
|
|
1030 ngx_http_script_var_code_t *var;
|
|
|
1031 ngx_http_script_value_code_t *val;
|
|
|
1032 ngx_http_script_complex_value_code_t *complex;
|
|
50
|
1033
|
|
|
1034 value = cf->args->elts;
|
|
|
1035
|
|
|
1036 if (value[1].data[0] != '$') {
|
|
|
1037 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
1038 "invalid variable name \"%V\"", &value[1]);
|
|
|
1039 return NGX_CONF_ERROR;
|
|
|
1040 }
|
|
|
1041
|
|
|
1042 value[1].len--;
|
|
|
1043 value[1].data++;
|
|
|
1044
|
|
58
|
1045 v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGABLE);
|
|
50
|
1046 if (v == NULL) {
|
|
|
1047 return NGX_CONF_ERROR;
|
|
|
1048 }
|
|
|
1049
|
|
58
|
1050 index = ngx_http_get_variable_index(cf, &value[1]);
|
|
|
1051 if (index == NGX_ERROR) {
|
|
|
1052 return NGX_CONF_ERROR;
|
|
|
1053 }
|
|
50
|
1054
|
|
104
|
1055 if (v->handler == NULL) {
|
|
|
1056 v->handler = ngx_http_rewrite_var;
|
|
|
1057 v->data = index;
|
|
|
1058 }
|
|
58
|
1059
|
|
64
|
1060 n = ngx_http_script_variables_count(&value[2]);
|
|
|
1061
|
|
|
1062 if (n == 0) {
|
|
|
1063 val = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
1064 sizeof(ngx_http_script_value_code_t));
|
|
|
1065 if (val == NULL) {
|
|
|
1066 return NGX_CONF_ERROR;
|
|
|
1067 }
|
|
50
|
1068
|
|
64
|
1069 n = ngx_atoi(value[2].data, value[2].len);
|
|
|
1070
|
|
|
1071 if (n == NGX_ERROR) {
|
|
|
1072 n = 0;
|
|
|
1073 }
|
|
|
1074
|
|
|
1075 val->code = ngx_http_script_value_code;
|
|
|
1076 val->value = (uintptr_t) n;
|
|
|
1077 val->text_len = (uintptr_t) value[2].len;
|
|
|
1078 val->text_data = (uintptr_t) value[2].data;
|
|
50
|
1079
|
|
64
|
1080 } else {
|
|
|
1081 complex = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
1082 sizeof(ngx_http_script_complex_value_code_t));
|
|
|
1083 if (complex == NULL) {
|
|
|
1084 return NGX_CONF_ERROR;
|
|
|
1085 }
|
|
|
1086
|
|
|
1087 complex->code = ngx_http_script_complex_value_code;
|
|
|
1088 complex->lengths = NULL;
|
|
|
1089
|
|
|
1090 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
50
|
1091
|
|
64
|
1092 sc.cf = cf;
|
|
|
1093 sc.source = &value[2];
|
|
|
1094 sc.lengths = &complex->lengths;
|
|
|
1095 sc.values = &lcf->codes;
|
|
|
1096 sc.variables = n;
|
|
|
1097 sc.complete_lengths = 1;
|
|
|
1098
|
|
|
1099 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
1100 return NGX_CONF_ERROR;
|
|
|
1101 }
|
|
|
1102 }
|
|
50
|
1103
|
|
58
|
1104 var = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
1105 sizeof(ngx_http_script_var_code_t));
|
|
50
|
1106 if (var == NULL) {
|
|
|
1107 return NGX_CONF_ERROR;
|
|
|
1108 }
|
|
|
1109
|
|
58
|
1110 var->code = ngx_http_script_set_var_code;
|
|
|
1111 var->index = (uintptr_t) index;
|
|
50
|
1112
|
|
|
1113 return NGX_CONF_OK;
|
|
|
1114 }
|
