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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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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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46 void *parent, void *child);
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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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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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75 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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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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183
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112
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184 /* 1 byte for terminating '\0' */
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185
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186 len = 1;
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187
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188 while (*(uintptr_t *) e.ip) {
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189 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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190 len += lcode(&e);
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191 }
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192
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193 ctx->index.len = len;
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112
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194
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195 /* 16 bytes are preallocation */
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196
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197 len += 16;
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58
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198 }
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199
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200 if (len > ctx->path.len) {
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201
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202 last = ngx_http_map_uri_to_path(r, &ctx->path, len);
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203 if (last == NULL) {
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204 return NGX_ERROR;
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205 }
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106
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206
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207 ctx->index.data = last;
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208 }
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209
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210 if (index[i].values == NULL) {
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106
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211
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212 /* index[i].name.len includes the terminating '\0' */
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213
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214 ngx_memcpy(ctx->index.data, index[i].name.data, index[i].name.len);
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215
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58
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216 } else {
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217 e.ip = index[i].values->elts;
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218 e.pos = ctx->index.data;
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219
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220 while (*(uintptr_t *) e.ip) {
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221 code = *(ngx_http_script_code_pt *) e.ip;
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222 code((ngx_http_script_engine_t *) &e);
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223 }
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224
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225 if (*ctx->index.data == '/') {
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226 ctx->index.len--;
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227 return ngx_http_internal_redirect(r, &ctx->index, &r->args);
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228 }
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229
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230 *e.pos++ = '\0';
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231 }
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232
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233 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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234 "open index \"%s\"", ctx->path.data);
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235
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112
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236 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_pool_cleanup_file_t));
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237 if (cln == NULL) {
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238 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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239 }
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240
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241 fd = ngx_open_file(ctx->path.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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242
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243 if (fd == (ngx_fd_t) NGX_AGAIN) {
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244 ctx->current = i;
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245 return NGX_AGAIN;
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246 }
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247
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248 if (fd == NGX_INVALID_FILE) {
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249 err = ngx_errno;
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250
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251 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, err,
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106
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252 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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253
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254 if (err == NGX_ENOTDIR) {
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255 return ngx_http_index_error(r, ctx, err);
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256
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257 } else if (err == NGX_EACCES) {
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258 return ngx_http_index_error(r, ctx, err);
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259 }
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260
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261 if (!ctx->tested) {
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262 rc = ngx_http_index_test_dir(r, ctx);
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263
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264 if (rc != NGX_OK) {
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265 return rc;
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266 }
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267
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268 ctx->tested = 1;
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269 }
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270
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271 if (err == NGX_ENOENT) {
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272 continue;
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273 }
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274
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275 ngx_log_error(NGX_LOG_ERR, log, err,
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276 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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277
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278 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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279 }
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280
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112
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281 cln->handler = ngx_pool_cleanup_file;
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282 clnf = cln->data;
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283
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112
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284 clnf->fd = fd;
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285 clnf->name = ctx->path.data;
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286 clnf->log = r->pool->log;
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287
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288 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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289
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290 uri.len = r->uri.len + ctx->index.len - 1;
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291
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292 if (!clcf->alias) {
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293 uri.data = ctx->path.data + clcf->root.len;
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294
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295 } else {
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296 uri.data = ngx_palloc(r->pool, uri.len);
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297 if (uri.data == NULL) {
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298 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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299 }
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300
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301 last = ngx_cpymem(uri.data, r->uri.data, r->uri.len);
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302 ngx_memcpy(last, ctx->index.data, ctx->index.len - 1);
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303 }
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304
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305 return ngx_http_internal_redirect(r, &uri, &r->args);
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306 }
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307
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308 return NGX_DECLINED;
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309 }
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310
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311
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58
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312 static ngx_int_t
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313 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx)
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314 {
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315 ngx_err_t err;
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316 ngx_file_info_t fi;
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317
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318 *(ctx->index.data - 1) = '\0';
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319
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320 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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106
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321 "http index check dir: \"%s\"", ctx->path.data);
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322
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106
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323 if (ngx_file_info(ctx->path.data, &fi) == -1) {
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324
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325 err = ngx_errno;
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326
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327 if (err == NGX_ENOENT) {
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328 *(ctx->index.data - 1) = '/';
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329 return ngx_http_index_error(r, ctx, err);
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330 }
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331
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332 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
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106
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333 ngx_file_info_n " \"%s\" failed", ctx->path.data);
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334
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335 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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336 }
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337
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58
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338 *(ctx->index.data - 1) = '/';
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339
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58
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340 if (ngx_is_dir(&fi)) {
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341 return NGX_OK;
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342 }
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343
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344 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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106
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345 "\"%s\" is not a directory", ctx->path.data);
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58
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346
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347 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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348 }
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349
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350
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58
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351 static ngx_int_t
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352 ngx_http_index_error(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx,
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353 ngx_err_t err)
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50
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354 {
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355 if (err == NGX_EACCES) {
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356 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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357 "\"%s\" is forbidden", ctx->path.data);
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358
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359 return NGX_HTTP_FORBIDDEN;
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360 }
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361
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362 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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363 "\"%s\" is not found", ctx->path.data);
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364
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365 return NGX_HTTP_NOT_FOUND;
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366 }
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367
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368
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58
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369 static void *
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370 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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371 {
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372 ngx_http_index_loc_conf_t *conf;
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373
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374 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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375 if (conf == NULL) {
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376 return NGX_CONF_ERROR;
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377 }
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378
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379 conf->indices = NULL;
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380 conf->max_index_len = 1;
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381
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382 return conf;
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383 }
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384
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385
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386 static char *
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387 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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388 {
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389 ngx_http_index_loc_conf_t *prev = parent;
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390 ngx_http_index_loc_conf_t *conf = child;
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391
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392 ngx_http_index_t *index;
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393
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394 if (conf->indices == NULL) {
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395 conf->indices = prev->indices;
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396 conf->max_index_len = prev->max_index_len;
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|
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397 }
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398
|
|
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399 if (conf->indices == NULL) {
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400 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
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|
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401 if (conf->indices == NULL) {
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|
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402 return NGX_CONF_ERROR;
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|
|
403 }
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|
|
404
|
|
|
405 index = ngx_array_push(conf->indices);
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|
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406 if (index == NULL) {
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|
|
407 return NGX_CONF_ERROR;
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|
|
408 }
|
|
|
409
|
|
|
410 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
411 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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|
|
412 index->lengths = NULL;
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|
|
413 index->values = NULL;
|
|
|
414
|
|
|
415 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
416
|
|
|
417 return NGX_CONF_OK;
|
|
|
418 }
|
|
|
419
|
|
|
420 return NGX_CONF_OK;
|
|
|
421 }
|
|
|
422
|
|
|
423
|
|
|
424 /* TODO: warn about duplicate indices */
|
|
|
425
|
|
|
426 static char *
|
|
|
427 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
428 {
|
|
|
429 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
430
|
|
|
431 ngx_uint_t i, n;
|
|
|
432 ngx_str_t *value;
|
|
|
433 ngx_http_index_t *index;
|
|
|
434 ngx_http_script_compile_t sc;
|
|
|
435
|
|
|
436 if (ilcf->indices == NULL) {
|
|
|
437 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
|
|
|
438 if (ilcf->indices == NULL) {
|
|
|
439 return NGX_CONF_ERROR;
|
|
|
440 }
|
|
|
441 }
|
|
|
442
|
|
|
443 value = cf->args->elts;
|
|
|
444
|
|
|
445 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
446 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
|
|
|
447 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
448 "only the last index in \"index\" directive "
|
|
|
449 "may be absolute");
|
|
|
450 return NGX_CONF_ERROR;
|
|
|
451 }
|
|
|
452
|
|
|
453 if (value[i].len == 0) {
|
|
|
454 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
455 "index \"%V\" in \"index\" directive is invalid",
|
|
|
456 &value[1]);
|
|
|
457 return NGX_CONF_ERROR;
|
|
|
458 }
|
|
|
459
|
|
|
460 index = ngx_array_push(ilcf->indices);
|
|
|
461 if (index == NULL) {
|
|
|
462 return NGX_CONF_ERROR;
|
|
|
463 }
|
|
|
464
|
|
|
465 index->name.len = value[i].len;
|
|
|
466 index->name.data = value[i].data;
|
|
|
467 index->lengths = NULL;
|
|
|
468 index->values = NULL;
|
|
|
469
|
|
|
470 n = ngx_http_script_variables_count(&value[i]);
|
|
|
471
|
|
|
472 if (n == 0) {
|
|
|
473 if (ilcf->max_index_len != 0
|
|
|
474 && ilcf->max_index_len < index->name.len)
|
|
|
475 {
|
|
|
476 ilcf->max_index_len = index->name.len;
|
|
|
477 }
|
|
|
478
|
|
106
|
479 /* include the terminating '\0' to the length to use ngx_memcpy() */
|
|
|
480 index->name.len++;
|
|
|
481
|
|
58
|
482 continue;
|
|
|
483 }
|
|
|
484
|
|
|
485 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
486
|
|
|
487 sc.cf = cf;
|
|
|
488 sc.source = &value[i];
|
|
|
489 sc.lengths = &index->lengths;
|
|
|
490 sc.values = &index->values;
|
|
|
491 sc.variables = n;
|
|
|
492 sc.complete_lengths = 1;
|
|
|
493 sc.complete_values = 1;
|
|
|
494
|
|
|
495 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
496 return NGX_CONF_ERROR;
|
|
|
497 }
|
|
|
498
|
|
|
499 ilcf->max_index_len = 0;
|
|
|
500 }
|
|
|
501
|
|
|
502 return NGX_CONF_OK;
|
|
|
503 }
|
|
|
504
|
|
|
505
|
|
|
506 static ngx_int_t
|
|
|
507 ngx_http_index_init(ngx_cycle_t *cycle)
|
|
50
|
508 {
|
|
|
509 ngx_http_handler_pt *h;
|
|
|
510 ngx_http_core_main_conf_t *cmcf;
|
|
|
511
|
|
|
512 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
|
513
|
|
|
514 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
515 if (h == NULL) {
|
|
|
516 return NGX_ERROR;
|
|
|
517 }
|
|
|
518
|
|
|
519 *h = ngx_http_index_handler;
|
|
|
520
|
|
|
521 return NGX_OK;
|
|
|
522 }
|
