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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_array_t *lengths;
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15 ngx_array_t *values;
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16 } ngx_http_index_t;
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17
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18
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19 typedef struct {
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20 ngx_array_t *indices; /* array of ngx_http_index_t */
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50
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21 size_t max_index_len;
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22 } ngx_http_index_loc_conf_t;
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23
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24
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25 typedef struct {
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58
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26 ngx_uint_t current;
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27
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106
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28 ngx_str_t path;
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29 ngx_str_t index;
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30
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31 ngx_uint_t tested; /* unsigned tested:1 */
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50
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32 } ngx_http_index_ctx_t;
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33
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34
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35 #define NGX_HTTP_DEFAULT_INDEX "index.html"
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36
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37
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38 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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58
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39 ngx_http_index_ctx_t *ctx);
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50
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40 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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58
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41 ngx_http_index_ctx_t *ctx, ngx_err_t err);
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42
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43 static ngx_int_t ngx_http_index_init(ngx_cycle_t *cycle);
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44 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
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45 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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58
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46 void *parent, void *child);
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50
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47 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
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58
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48 void *conf);
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50
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49
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50
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51 static ngx_command_t ngx_http_index_commands[] = {
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52
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53 { ngx_string("index"),
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58
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54 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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50
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55 ngx_http_index_set_index,
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56 NGX_HTTP_LOC_CONF_OFFSET,
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57 0,
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58 NULL },
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59
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60 #if (NGX_HTTP_CACHE)
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61
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62 { ngx_string("index_cache"),
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63 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3,
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64 ngx_http_set_cache_slot,
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65 NGX_HTTP_LOC_CONF_OFFSET,
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66 offsetof(ngx_http_index_loc_conf_t, index_cache),
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67 NULL },
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68
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69 #endif
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70
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71 ngx_null_command
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72 };
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73
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74
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216
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75 static ngx_http_module_t ngx_http_index_module_ctx = {
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58
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76 NULL, /* preconfiguration */
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77 NULL, /* postconfiguration */
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78
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79 NULL, /* create main configuration */
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80 NULL, /* init main configuration */
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81
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82 NULL, /* create server configuration */
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83 NULL, /* merge server configuration */
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84
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85 ngx_http_index_create_loc_conf, /* create location configration */
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86 ngx_http_index_merge_loc_conf /* merge location configration */
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87 };
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88
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89
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90 ngx_module_t ngx_http_index_module = {
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58
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91 NGX_MODULE_V1,
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92 &ngx_http_index_module_ctx, /* module context */
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93 ngx_http_index_commands, /* module directives */
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94 NGX_HTTP_MODULE, /* module type */
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90
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95 NULL, /* init master */
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96 ngx_http_index_init, /* init module */
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90
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97 NULL, /* init process */
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98 NULL, /* init thread */
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99 NULL, /* exit thread */
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100 NULL, /* exit process */
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101 NULL, /* exit master */
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102 NGX_MODULE_V1_PADDING
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50
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103 };
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104
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105
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106 /*
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107 * Try to open the first index file before the test of the directory existence
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108 * because the valid requests should be many more than invalid ones.
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109 * If open() would fail, then stat() should be more quickly because some data
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110 * is already cached in the kernel.
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111 * Besides, Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR).
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112 * Unix has ENOTDIR error, although it less helpfull - it points only
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113 * that path contains the usual file in place of the directory.
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114 */
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115
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58
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116 static ngx_int_t
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117 ngx_http_index_handler(ngx_http_request_t *r)
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118 {
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119 u_char *last;
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120 size_t len;
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121 ngx_fd_t fd;
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122 ngx_int_t rc;
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123 ngx_err_t err;
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106
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124 ngx_str_t uri;
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125 ngx_log_t *log;
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126 ngx_uint_t i;
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127 ngx_http_index_t *index;
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128 ngx_http_index_ctx_t *ctx;
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112
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129 ngx_pool_cleanup_t *cln;
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130 ngx_pool_cleanup_file_t *clnf;
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58
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131 ngx_http_script_code_pt code;
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132 ngx_http_script_engine_t e;
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133 ngx_http_core_loc_conf_t *clcf;
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134 ngx_http_index_loc_conf_t *ilcf;
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135 ngx_http_script_len_code_pt lcode;
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136
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137 if (r->uri.data[r->uri.len - 1] != '/') {
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138 return NGX_DECLINED;
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139 }
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140
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141 /* TODO: Win32 */
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142 if (r->zero_in_uri) {
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143 return NGX_DECLINED;
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144 }
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145
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146 log = r->connection->log;
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147
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148 /*
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149 * we use context because the handler supports an async file opening,
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150 * and may be called several times
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151 */
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152
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153 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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154
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155 ctx = ngx_http_get_module_ctx(r, ngx_http_index_module);
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156 if (ctx == NULL) {
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157
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158 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_index_ctx_t));
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159 if (ctx == NULL) {
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160 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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161 }
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162
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163 ngx_http_set_ctx(r, ctx, ngx_http_index_module);
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58
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164 }
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165
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166 index = ilcf->indices->elts;
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167 for (i = ctx->current; i < ilcf->indices->nelts; i++) {
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168
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169 if (index[i].lengths == NULL) {
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170
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171 if (index[i].name.data[0] == '/') {
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172 return ngx_http_internal_redirect(r, &index[i].name, &r->args);
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173 }
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174
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175 len = ilcf->max_index_len;
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176 ctx->index.len = index[i].name.len;
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177
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58
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178 } else {
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179 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
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180
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181 e.ip = index[i].lengths->elts;
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182 e.request = r;
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122
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183 e.flushed = 1;
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184
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112
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185 /* 1 byte for terminating '\0' */
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186
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187 len = 1;
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188
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58
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189 while (*(uintptr_t *) e.ip) {
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190 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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191 len += lcode(&e);
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192 }
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193
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194 ctx->index.len = len;
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112
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195
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196 /* 16 bytes are preallocation */
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197
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198 len += 16;
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58
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199 }
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200
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201 if (len > ctx->path.len) {
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202
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203 last = ngx_http_map_uri_to_path(r, &ctx->path, len);
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204 if (last == NULL) {
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205 return NGX_ERROR;
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206 }
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106
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207
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208 ctx->index.data = last;
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209 }
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210
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211 if (index[i].values == NULL) {
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106
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212
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213 /* index[i].name.len includes the terminating '\0' */
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214
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215 ngx_memcpy(ctx->index.data, index[i].name.data, index[i].name.len);
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216
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58
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217 } else {
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218 e.ip = index[i].values->elts;
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219 e.pos = ctx->index.data;
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220
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221 while (*(uintptr_t *) e.ip) {
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222 code = *(ngx_http_script_code_pt *) e.ip;
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223 code((ngx_http_script_engine_t *) &e);
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224 }
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225
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58
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226 if (*ctx->index.data == '/') {
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227 ctx->index.len--;
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228 return ngx_http_internal_redirect(r, &ctx->index, &r->args);
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229 }
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230
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231 *e.pos++ = '\0';
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232 }
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233
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234 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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235 "open index \"%s\"", ctx->path.data);
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236
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112
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237 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_pool_cleanup_file_t));
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238 if (cln == NULL) {
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239 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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240 }
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241
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106
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242 fd = ngx_open_file(ctx->path.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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243
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244 if (fd == (ngx_fd_t) NGX_AGAIN) {
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245 ctx->current = i;
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246 return NGX_AGAIN;
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247 }
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248
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249 if (fd == NGX_INVALID_FILE) {
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250 err = ngx_errno;
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251
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252 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, err,
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106
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253 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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254
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255 if (err == NGX_ENOTDIR) {
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256 return ngx_http_index_error(r, ctx, err);
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257
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258 } else if (err == NGX_EACCES) {
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259 return ngx_http_index_error(r, ctx, err);
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260 }
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261
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262 if (!ctx->tested) {
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263 rc = ngx_http_index_test_dir(r, ctx);
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264
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265 if (rc != NGX_OK) {
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266 return rc;
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267 }
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268
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269 ctx->tested = 1;
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270 }
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271
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272 if (err == NGX_ENOENT) {
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273 continue;
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274 }
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275
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276 ngx_log_error(NGX_LOG_ERR, log, err,
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277 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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278
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279 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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280 }
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281
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112
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282 cln->handler = ngx_pool_cleanup_file;
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283 clnf = cln->data;
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284
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112
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285 clnf->fd = fd;
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286 clnf->name = ctx->path.data;
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287 clnf->log = r->pool->log;
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288
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289 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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290
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291 uri.len = r->uri.len + ctx->index.len - 1;
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292
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293 if (!clcf->alias) {
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144
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294 uri.data = ctx->path.data + r->root_length;
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106
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295
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296 } else {
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297 uri.data = ngx_palloc(r->pool, uri.len);
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298 if (uri.data == NULL) {
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299 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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300 }
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301
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122
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302 last = ngx_copy(uri.data, r->uri.data, r->uri.len);
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106
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303 ngx_memcpy(last, ctx->index.data, ctx->index.len - 1);
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50
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304 }
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305
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306 return ngx_http_internal_redirect(r, &uri, &r->args);
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50
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307 }
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308
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309 return NGX_DECLINED;
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310 }
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311
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312
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58
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313 static ngx_int_t
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314 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx)
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315 {
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316 ngx_err_t err;
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317 ngx_file_info_t fi;
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318
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319 *(ctx->index.data - 1) = '\0';
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320
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321 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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106
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322 "http index check dir: \"%s\"", ctx->path.data);
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323
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106
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324 if (ngx_file_info(ctx->path.data, &fi) == -1) {
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325
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326 err = ngx_errno;
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327
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328 if (err == NGX_ENOENT) {
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58
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329 *(ctx->index.data - 1) = '/';
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330 return ngx_http_index_error(r, ctx, err);
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331 }
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332
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333 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
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106
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334 ngx_file_info_n " \"%s\" failed", ctx->path.data);
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335
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336 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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337 }
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338
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58
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339 *(ctx->index.data - 1) = '/';
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340
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58
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341 if (ngx_is_dir(&fi)) {
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342 return NGX_OK;
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343 }
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344
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58
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345 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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106
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346 "\"%s\" is not a directory", ctx->path.data);
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58
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347
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348 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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349 }
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350
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351
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58
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352 static ngx_int_t
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353 ngx_http_index_error(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx,
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354 ngx_err_t err)
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50
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355 {
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356 if (err == NGX_EACCES) {
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357 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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358 "\"%s\" is forbidden", ctx->path.data);
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126
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359
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360 return NGX_HTTP_FORBIDDEN;
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361 }
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362
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363 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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364 "\"%s\" is not found", ctx->path.data);
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58
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365
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366 return NGX_HTTP_NOT_FOUND;
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367 }
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368
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369
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58
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370 static void *
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371 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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372 {
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373 ngx_http_index_loc_conf_t *conf;
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374
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375 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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376 if (conf == NULL) {
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377 return NGX_CONF_ERROR;
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378 }
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379
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380 conf->indices = NULL;
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381 conf->max_index_len = 1;
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382
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383 return conf;
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384 }
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385
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386
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387 static char *
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388 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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389 {
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390 ngx_http_index_loc_conf_t *prev = parent;
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391 ngx_http_index_loc_conf_t *conf = child;
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392
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393 ngx_http_index_t *index;
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394
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395 if (conf->indices == NULL) {
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396 conf->indices = prev->indices;
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397 conf->max_index_len = prev->max_index_len;
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398 }
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399
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400 if (conf->indices == NULL) {
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401 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
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402 if (conf->indices == NULL) {
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403 return NGX_CONF_ERROR;
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404 }
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405
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406 index = ngx_array_push(conf->indices);
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407 if (index == NULL) {
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408 return NGX_CONF_ERROR;
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|
409 }
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|
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410
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|
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411 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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412 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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413 index->lengths = NULL;
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|
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414 index->values = NULL;
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|
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415
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|
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416 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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|
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417
|
|
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418 return NGX_CONF_OK;
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|
|
419 }
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|
|
420
|
|
|
421 return NGX_CONF_OK;
|
|
|
422 }
|
|
|
423
|
|
|
424
|
|
|
425 /* TODO: warn about duplicate indices */
|
|
|
426
|
|
|
427 static char *
|
|
|
428 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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|
|
429 {
|
|
|
430 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
431
|
|
|
432 ngx_uint_t i, n;
|
|
|
433 ngx_str_t *value;
|
|
|
434 ngx_http_index_t *index;
|
|
|
435 ngx_http_script_compile_t sc;
|
|
|
436
|
|
|
437 if (ilcf->indices == NULL) {
|
|
|
438 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
|
|
|
439 if (ilcf->indices == NULL) {
|
|
|
440 return NGX_CONF_ERROR;
|
|
|
441 }
|
|
|
442 }
|
|
|
443
|
|
|
444 value = cf->args->elts;
|
|
|
445
|
|
|
446 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
447 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
|
|
|
448 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
449 "only the last index in \"index\" directive "
|
|
|
450 "may be absolute");
|
|
|
451 return NGX_CONF_ERROR;
|
|
|
452 }
|
|
|
453
|
|
|
454 if (value[i].len == 0) {
|
|
|
455 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
456 "index \"%V\" in \"index\" directive is invalid",
|
|
|
457 &value[1]);
|
|
|
458 return NGX_CONF_ERROR;
|
|
|
459 }
|
|
|
460
|
|
|
461 index = ngx_array_push(ilcf->indices);
|
|
|
462 if (index == NULL) {
|
|
|
463 return NGX_CONF_ERROR;
|
|
|
464 }
|
|
|
465
|
|
|
466 index->name.len = value[i].len;
|
|
|
467 index->name.data = value[i].data;
|
|
|
468 index->lengths = NULL;
|
|
|
469 index->values = NULL;
|
|
|
470
|
|
|
471 n = ngx_http_script_variables_count(&value[i]);
|
|
|
472
|
|
|
473 if (n == 0) {
|
|
|
474 if (ilcf->max_index_len != 0
|
|
|
475 && ilcf->max_index_len < index->name.len)
|
|
|
476 {
|
|
|
477 ilcf->max_index_len = index->name.len;
|
|
|
478 }
|
|
|
479
|
|
122
|
480 /* include the terminating '\0' to the length to use ngx_copy() */
|
|
106
|
481 index->name.len++;
|
|
|
482
|
|
58
|
483 continue;
|
|
|
484 }
|
|
|
485
|
|
|
486 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
487
|
|
|
488 sc.cf = cf;
|
|
|
489 sc.source = &value[i];
|
|
|
490 sc.lengths = &index->lengths;
|
|
|
491 sc.values = &index->values;
|
|
|
492 sc.variables = n;
|
|
|
493 sc.complete_lengths = 1;
|
|
|
494 sc.complete_values = 1;
|
|
|
495
|
|
|
496 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
497 return NGX_CONF_ERROR;
|
|
|
498 }
|
|
|
499
|
|
|
500 ilcf->max_index_len = 0;
|
|
|
501 }
|
|
|
502
|
|
|
503 return NGX_CONF_OK;
|
|
|
504 }
|
|
|
505
|
|
|
506
|
|
|
507 static ngx_int_t
|
|
|
508 ngx_http_index_init(ngx_cycle_t *cycle)
|
|
50
|
509 {
|
|
|
510 ngx_http_handler_pt *h;
|
|
|
511 ngx_http_core_main_conf_t *cmcf;
|
|
|
512
|
|
|
513 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
|
514
|
|
|
515 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
516 if (h == NULL) {
|
|
|
517 return NGX_ERROR;
|
|
|
518 }
|
|
|
519
|
|
|
520 *h = ngx_http_index_handler;
|
|
|
521
|
|
|
522 return NGX_OK;
|
|
|
523 }
|
