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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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58
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29 ngx_str_t index;
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30
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248
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31 size_t root;
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32
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58
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33 ngx_uint_t tested; /* unsigned tested:1 */
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50
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34 } ngx_http_index_ctx_t;
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35
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36
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37 #define NGX_HTTP_DEFAULT_INDEX "index.html"
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38
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39
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40 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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58
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41 ngx_http_index_ctx_t *ctx);
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50
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42 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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58
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43 ngx_http_index_ctx_t *ctx, ngx_err_t err);
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50
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44
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230
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45 static ngx_int_t ngx_http_index_init(ngx_conf_t *cf);
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50
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46 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
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47 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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58
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48 void *parent, void *child);
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50
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49 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
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58
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50 void *conf);
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50
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51
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52
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53 static ngx_command_t ngx_http_index_commands[] = {
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54
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55 { ngx_string("index"),
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58
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56 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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50
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57 ngx_http_index_set_index,
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58 NGX_HTTP_LOC_CONF_OFFSET,
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59 0,
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60 NULL },
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61
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62 #if (NGX_HTTP_CACHE)
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63
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64 { ngx_string("index_cache"),
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65 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3,
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66 ngx_http_set_cache_slot,
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67 NGX_HTTP_LOC_CONF_OFFSET,
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68 offsetof(ngx_http_index_loc_conf_t, index_cache),
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69 NULL },
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70
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71 #endif
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72
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73 ngx_null_command
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74 };
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75
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76
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216
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77 static ngx_http_module_t ngx_http_index_module_ctx = {
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58
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78 NULL, /* preconfiguration */
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230
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79 ngx_http_index_init, /* postconfiguration */
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80
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81 NULL, /* create main configuration */
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82 NULL, /* init main configuration */
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83
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84 NULL, /* create server configuration */
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85 NULL, /* merge server configuration */
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86
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87 ngx_http_index_create_loc_conf, /* create location configration */
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88 ngx_http_index_merge_loc_conf /* merge location configration */
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89 };
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90
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91
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92 ngx_module_t ngx_http_index_module = {
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58
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93 NGX_MODULE_V1,
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94 &ngx_http_index_module_ctx, /* module context */
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95 ngx_http_index_commands, /* module directives */
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96 NGX_HTTP_MODULE, /* module type */
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90
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97 NULL, /* init master */
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230
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98 NULL, /* init module */
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90
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99 NULL, /* init process */
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100 NULL, /* init thread */
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101 NULL, /* exit thread */
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102 NULL, /* exit process */
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103 NULL, /* exit master */
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104 NGX_MODULE_V1_PADDING
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50
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105 };
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106
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107
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108 /*
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109 * Try to open the first index file before the test of the directory existence
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110 * because the valid requests should be many more than invalid ones.
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111 * If open() would fail, then stat() should be more quickly because some data
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112 * is already cached in the kernel.
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113 * Besides, Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR).
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114 * Unix has ENOTDIR error, although it less helpfull - it points only
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115 * that path contains the usual file in place of the directory.
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116 */
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117
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58
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118 static ngx_int_t
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119 ngx_http_index_handler(ngx_http_request_t *r)
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120 {
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121 u_char *last;
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122 size_t len;
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123 ngx_fd_t fd;
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124 ngx_int_t rc;
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125 ngx_err_t err;
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106
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126 ngx_str_t uri;
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127 ngx_log_t *log;
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128 ngx_uint_t i;
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129 ngx_http_index_t *index;
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130 ngx_http_index_ctx_t *ctx;
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112
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131 ngx_pool_cleanup_t *cln;
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132 ngx_pool_cleanup_file_t *clnf;
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58
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133 ngx_http_script_code_pt code;
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134 ngx_http_script_engine_t e;
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135 ngx_http_core_loc_conf_t *clcf;
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136 ngx_http_index_loc_conf_t *ilcf;
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137 ngx_http_script_len_code_pt lcode;
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50
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138
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139 if (r->uri.data[r->uri.len - 1] != '/') {
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140 return NGX_DECLINED;
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141 }
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142
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143 /* TODO: Win32 */
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144 if (r->zero_in_uri) {
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145 return NGX_DECLINED;
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146 }
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147
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148 log = r->connection->log;
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149
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150 /*
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151 * we use context because the handler supports an async file opening,
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152 * and may be called several times
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153 */
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154
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155 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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156
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157 ctx = ngx_http_get_module_ctx(r, ngx_http_index_module);
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158 if (ctx == NULL) {
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159
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160 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_index_ctx_t));
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161 if (ctx == NULL) {
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162 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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163 }
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164
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165 ngx_http_set_ctx(r, ctx, ngx_http_index_module);
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58
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166 }
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167
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168 index = ilcf->indices->elts;
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169 for (i = ctx->current; i < ilcf->indices->nelts; i++) {
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170
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171 if (index[i].lengths == NULL) {
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172
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173 if (index[i].name.data[0] == '/') {
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174 return ngx_http_internal_redirect(r, &index[i].name, &r->args);
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175 }
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176
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177 len = ilcf->max_index_len;
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178 ctx->index.len = index[i].name.len;
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179
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58
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180 } else {
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181 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
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182
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183 e.ip = index[i].lengths->elts;
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184 e.request = r;
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122
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185 e.flushed = 1;
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186
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112
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187 /* 1 byte for terminating '\0' */
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188
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189 len = 1;
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190
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58
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191 while (*(uintptr_t *) e.ip) {
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192 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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193 len += lcode(&e);
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194 }
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195
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196 ctx->index.len = len;
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112
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197
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198 /* 16 bytes are preallocation */
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199
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200 len += 16;
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58
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201 }
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202
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230
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203 if (len > (size_t) (ctx->path.data + ctx->path.len - ctx->index.data)) {
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204
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248
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205 last = ngx_http_map_uri_to_path(r, &ctx->path, &ctx->root, len);
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206 if (last == NULL) {
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207 return NGX_ERROR;
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50
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208 }
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209
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210 ctx->index.data = last;
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211 }
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212
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213 if (index[i].values == NULL) {
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106
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214
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215 /* index[i].name.len includes the terminating '\0' */
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216
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217 ngx_memcpy(ctx->index.data, index[i].name.data, index[i].name.len);
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218
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58
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219 } else {
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220 e.ip = index[i].values->elts;
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221 e.pos = ctx->index.data;
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222
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223 while (*(uintptr_t *) e.ip) {
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224 code = *(ngx_http_script_code_pt *) e.ip;
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225 code((ngx_http_script_engine_t *) &e);
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226 }
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227
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228 if (*ctx->index.data == '/') {
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229 ctx->index.len--;
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230 return ngx_http_internal_redirect(r, &ctx->index, &r->args);
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50
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231 }
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232
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233 *e.pos++ = '\0';
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234 }
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235
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236 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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237 "open index \"%s\"", ctx->path.data);
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238
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112
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239 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_pool_cleanup_file_t));
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240 if (cln == NULL) {
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241 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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242 }
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243
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234
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244 fd = ngx_open_file(ctx->path.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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245
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246 if (fd == (ngx_fd_t) NGX_AGAIN) {
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247 ctx->current = i;
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248 return NGX_AGAIN;
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249 }
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250
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251 if (fd == NGX_INVALID_FILE) {
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252 err = ngx_errno;
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253
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254 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, err,
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106
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255 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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256
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257 if (err == NGX_ENOTDIR) {
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258 return ngx_http_index_error(r, ctx, err);
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259
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260 } else if (err == NGX_EACCES) {
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261 return ngx_http_index_error(r, ctx, err);
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262 }
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263
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264 if (!ctx->tested) {
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265 rc = ngx_http_index_test_dir(r, ctx);
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266
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267 if (rc != NGX_OK) {
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268 return rc;
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269 }
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270
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271 ctx->tested = 1;
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272 }
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273
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274 if (err == NGX_ENOENT) {
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275 continue;
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276 }
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277
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278 ngx_log_error(NGX_LOG_ERR, log, err,
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106
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279 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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280
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281 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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282 }
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283
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112
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284 cln->handler = ngx_pool_cleanup_file;
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285 clnf = cln->data;
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286
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112
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287 clnf->fd = fd;
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288 clnf->name = ctx->path.data;
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289 clnf->log = r->pool->log;
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290
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106
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291 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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292
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106
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293 uri.len = r->uri.len + ctx->index.len - 1;
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294
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295 if (!clcf->alias) {
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248
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296 uri.data = ctx->path.data + ctx->root;
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106
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297
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298 } else {
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299 uri.data = ngx_palloc(r->pool, uri.len);
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300 if (uri.data == NULL) {
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301 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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302 }
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303
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122
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304 last = ngx_copy(uri.data, r->uri.data, r->uri.len);
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106
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305 ngx_memcpy(last, ctx->index.data, ctx->index.len - 1);
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50
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306 }
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307
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106
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308 return ngx_http_internal_redirect(r, &uri, &r->args);
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50
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309 }
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310
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311 return NGX_DECLINED;
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312 }
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313
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314
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58
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315 static ngx_int_t
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316 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx)
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317 {
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252
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318 u_char c;
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319 ngx_uint_t i;
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320 ngx_err_t err;
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321 ngx_file_info_t fi;
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322
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252
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323 c = *(ctx->index.data - 1);
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324 i = (c == '/') ? 1 : 0;
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325 *(ctx->index.data - i) = '\0';
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326
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327 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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106
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328 "http index check dir: \"%s\"", ctx->path.data);
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329
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106
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330 if (ngx_file_info(ctx->path.data, &fi) == -1) {
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331
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332 err = ngx_errno;
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333
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334 if (err == NGX_ENOENT) {
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252
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335 *(ctx->index.data - i) = c;
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336 return ngx_http_index_error(r, ctx, err);
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337 }
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338
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339 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
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106
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340 ngx_file_info_n " \"%s\" failed", ctx->path.data);
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50
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341
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342 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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343 }
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344
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252
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345 *(ctx->index.data - i) = c;
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50
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346
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58
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347 if (ngx_is_dir(&fi)) {
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50
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348 return NGX_OK;
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349 }
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350
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58
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351 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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106
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352 "\"%s\" is not a directory", ctx->path.data);
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58
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353
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354 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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355 }
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356
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357
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58
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358 static ngx_int_t
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359 ngx_http_index_error(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx,
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360 ngx_err_t err)
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50
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361 {
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362 if (err == NGX_EACCES) {
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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 forbidden", ctx->path.data);
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126
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365
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366 return NGX_HTTP_FORBIDDEN;
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367 }
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368
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369 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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370 "\"%s\" is not found", ctx->path.data);
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58
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371
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50
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372 return NGX_HTTP_NOT_FOUND;
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373 }
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374
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375
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58
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376 static void *
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377 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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378 {
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379 ngx_http_index_loc_conf_t *conf;
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380
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381 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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382 if (conf == NULL) {
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383 return NGX_CONF_ERROR;
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384 }
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385
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386 conf->indices = NULL;
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230
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387 conf->max_index_len = 0;
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58
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388
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389 return conf;
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390 }
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391
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392
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393 static char *
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394 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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395 {
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396 ngx_http_index_loc_conf_t *prev = parent;
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397 ngx_http_index_loc_conf_t *conf = child;
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398
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399 ngx_http_index_t *index;
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400
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401 if (conf->indices == NULL) {
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402 conf->indices = prev->indices;
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403 conf->max_index_len = prev->max_index_len;
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404 }
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405
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406 if (conf->indices == NULL) {
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407 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
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408 if (conf->indices == NULL) {
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409 return NGX_CONF_ERROR;
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410 }
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411
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412 index = ngx_array_push(conf->indices);
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413 if (index == NULL) {
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414 return NGX_CONF_ERROR;
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415 }
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416
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417 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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418 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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419 index->lengths = NULL;
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420 index->values = NULL;
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421
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422 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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423
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424 return NGX_CONF_OK;
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425 }
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426
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427 return NGX_CONF_OK;
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428 }
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429
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430
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230
|
431 static ngx_int_t
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432 ngx_http_index_init(ngx_conf_t *cf)
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433 {
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434 ngx_http_handler_pt *h;
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435 ngx_http_core_main_conf_t *cmcf;
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436
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437 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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438
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439 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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440 if (h == NULL) {
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441 return NGX_ERROR;
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442 }
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443
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444 *h = ngx_http_index_handler;
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445
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446 return NGX_OK;
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|
|
447 }
|
|
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448
|
|
|
449
|
|
58
|
450 /* TODO: warn about duplicate indices */
|
|
|
451
|
|
|
452 static char *
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|
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453 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
454 {
|
|
|
455 ngx_http_index_loc_conf_t *ilcf = conf;
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|
|
456
|
|
230
|
457 ngx_str_t *value;
|
|
58
|
458 ngx_uint_t i, n;
|
|
|
459 ngx_http_index_t *index;
|
|
|
460 ngx_http_script_compile_t sc;
|
|
|
461
|
|
|
462 if (ilcf->indices == NULL) {
|
|
|
463 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
|
|
|
464 if (ilcf->indices == NULL) {
|
|
|
465 return NGX_CONF_ERROR;
|
|
|
466 }
|
|
|
467 }
|
|
|
468
|
|
|
469 value = cf->args->elts;
|
|
|
470
|
|
|
471 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
472 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
|
|
|
473 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
474 "only the last index in \"index\" directive "
|
|
|
475 "may be absolute");
|
|
|
476 return NGX_CONF_ERROR;
|
|
|
477 }
|
|
|
478
|
|
|
479 if (value[i].len == 0) {
|
|
|
480 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
481 "index \"%V\" in \"index\" directive is invalid",
|
|
|
482 &value[1]);
|
|
|
483 return NGX_CONF_ERROR;
|
|
|
484 }
|
|
|
485
|
|
|
486 index = ngx_array_push(ilcf->indices);
|
|
|
487 if (index == NULL) {
|
|
|
488 return NGX_CONF_ERROR;
|
|
|
489 }
|
|
|
490
|
|
|
491 index->name.len = value[i].len;
|
|
|
492 index->name.data = value[i].data;
|
|
|
493 index->lengths = NULL;
|
|
|
494 index->values = NULL;
|
|
|
495
|
|
|
496 n = ngx_http_script_variables_count(&value[i]);
|
|
|
497
|
|
|
498 if (n == 0) {
|
|
230
|
499 if (ilcf->max_index_len < index->name.len) {
|
|
58
|
500 ilcf->max_index_len = index->name.len;
|
|
|
501 }
|
|
|
502
|
|
122
|
503 /* include the terminating '\0' to the length to use ngx_copy() */
|
|
106
|
504 index->name.len++;
|
|
|
505
|
|
58
|
506 continue;
|
|
|
507 }
|
|
|
508
|
|
|
509 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
510
|
|
|
511 sc.cf = cf;
|
|
|
512 sc.source = &value[i];
|
|
|
513 sc.lengths = &index->lengths;
|
|
|
514 sc.values = &index->values;
|
|
|
515 sc.variables = n;
|
|
|
516 sc.complete_lengths = 1;
|
|
|
517 sc.complete_values = 1;
|
|
|
518
|
|
|
519 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
520 return NGX_CONF_ERROR;
|
|
|
521 }
|
|
|
522 }
|
|
|
523
|
|
|
524 return NGX_CONF_OK;
|
|
|
525 }
|
