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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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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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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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272
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143 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
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144 return NGX_DECLINED;
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145 }
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146
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50
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147 /* TODO: Win32 */
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148 if (r->zero_in_uri) {
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149 return NGX_DECLINED;
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150 }
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151
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152 log = r->connection->log;
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153
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154 /*
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155 * we use context because the handler supports an async file opening,
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156 * and may be called several times
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157 */
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158
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159 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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160
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161 ctx = ngx_http_get_module_ctx(r, ngx_http_index_module);
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162 if (ctx == NULL) {
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163
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164 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_index_ctx_t));
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165 if (ctx == NULL) {
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166 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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167 }
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168
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169 ngx_http_set_ctx(r, ctx, ngx_http_index_module);
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58
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170 }
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50
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171
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172 index = ilcf->indices->elts;
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173 for (i = ctx->current; i < ilcf->indices->nelts; i++) {
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174
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175 if (index[i].lengths == NULL) {
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176
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177 if (index[i].name.data[0] == '/') {
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178 return ngx_http_internal_redirect(r, &index[i].name, &r->args);
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179 }
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180
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181 len = ilcf->max_index_len;
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182 ctx->index.len = index[i].name.len;
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183
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58
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184 } else {
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185 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
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186
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187 e.ip = index[i].lengths->elts;
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188 e.request = r;
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122
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189 e.flushed = 1;
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190
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112
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191 /* 1 byte for terminating '\0' */
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192
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112
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193 len = 1;
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194
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58
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195 while (*(uintptr_t *) e.ip) {
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196 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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197 len += lcode(&e);
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198 }
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199
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200 ctx->index.len = len;
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112
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201
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202 /* 16 bytes are preallocation */
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203
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204 len += 16;
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58
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205 }
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206
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230
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207 if (len > (size_t) (ctx->path.data + ctx->path.len - ctx->index.data)) {
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208
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248
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209 last = ngx_http_map_uri_to_path(r, &ctx->path, &ctx->root, len);
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210 if (last == NULL) {
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211 return NGX_ERROR;
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50
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212 }
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213
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214 ctx->index.data = last;
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215 }
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216
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217 if (index[i].values == NULL) {
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106
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218
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219 /* index[i].name.len includes the terminating '\0' */
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220
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221 ngx_memcpy(ctx->index.data, index[i].name.data, index[i].name.len);
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222
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58
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223 } else {
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224 e.ip = index[i].values->elts;
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225 e.pos = ctx->index.data;
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226
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227 while (*(uintptr_t *) e.ip) {
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228 code = *(ngx_http_script_code_pt *) e.ip;
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229 code((ngx_http_script_engine_t *) &e);
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50
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230 }
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231
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58
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232 if (*ctx->index.data == '/') {
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233 ctx->index.len--;
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234 return ngx_http_internal_redirect(r, &ctx->index, &r->args);
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50
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235 }
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236
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237 *e.pos++ = '\0';
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238 }
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239
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240 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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241 "open index \"%s\"", ctx->path.data);
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242
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112
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243 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_pool_cleanup_file_t));
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244 if (cln == NULL) {
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245 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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246 }
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247
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276
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248 fd = ngx_open_file(ctx->path.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
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249
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250 if (fd == (ngx_fd_t) NGX_AGAIN) {
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251 ctx->current = i;
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252 return NGX_AGAIN;
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253 }
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254
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255 if (fd == NGX_INVALID_FILE) {
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256 err = ngx_errno;
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257
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258 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, err,
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106
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259 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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260
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261 if (err == NGX_ENOTDIR) {
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262 return ngx_http_index_error(r, ctx, err);
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263
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264 } else if (err == NGX_EACCES) {
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265 return ngx_http_index_error(r, ctx, err);
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266 }
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267
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268 if (!ctx->tested) {
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269 rc = ngx_http_index_test_dir(r, ctx);
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270
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271 if (rc != NGX_OK) {
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272 return rc;
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273 }
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274
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275 ctx->tested = 1;
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276 }
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277
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278 if (err == NGX_ENOENT) {
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279 continue;
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280 }
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281
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282 ngx_log_error(NGX_LOG_ERR, log, err,
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106
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283 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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284
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285 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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286 }
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287
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112
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288 cln->handler = ngx_pool_cleanup_file;
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289 clnf = cln->data;
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290
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112
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291 clnf->fd = fd;
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292 clnf->name = ctx->path.data;
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293 clnf->log = r->pool->log;
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294
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106
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295 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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50
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296
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106
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297 uri.len = r->uri.len + ctx->index.len - 1;
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298
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299 if (!clcf->alias) {
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248
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300 uri.data = ctx->path.data + ctx->root;
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106
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301
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302 } else {
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303 uri.data = ngx_palloc(r->pool, uri.len);
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304 if (uri.data == NULL) {
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305 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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306 }
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307
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122
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308 last = ngx_copy(uri.data, r->uri.data, r->uri.len);
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106
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309 ngx_memcpy(last, ctx->index.data, ctx->index.len - 1);
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50
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310 }
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311
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106
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312 return ngx_http_internal_redirect(r, &uri, &r->args);
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50
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313 }
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314
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315 return NGX_DECLINED;
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316 }
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317
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318
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58
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319 static ngx_int_t
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320 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx)
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321 {
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252
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322 u_char c;
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323 ngx_uint_t i;
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58
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324 ngx_err_t err;
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325 ngx_file_info_t fi;
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326
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252
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327 c = *(ctx->index.data - 1);
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328 i = (c == '/') ? 1 : 0;
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329 *(ctx->index.data - i) = '\0';
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50
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330
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331 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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106
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332 "http index check dir: \"%s\"", ctx->path.data);
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50
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333
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106
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334 if (ngx_file_info(ctx->path.data, &fi) == -1) {
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50
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335
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336 err = ngx_errno;
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337
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338 if (err == NGX_ENOENT) {
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252
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339 *(ctx->index.data - i) = c;
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340 return ngx_http_index_error(r, ctx, err);
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341 }
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342
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343 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
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106
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344 ngx_file_info_n " \"%s\" failed", ctx->path.data);
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50
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345
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346 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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347 }
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348
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252
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349 *(ctx->index.data - i) = c;
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50
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350
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58
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351 if (ngx_is_dir(&fi)) {
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50
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352 return NGX_OK;
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353 }
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354
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58
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355 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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106
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356 "\"%s\" is not a directory", ctx->path.data);
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58
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357
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358 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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359 }
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360
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361
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58
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362 static ngx_int_t
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363 ngx_http_index_error(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx,
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364 ngx_err_t err)
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50
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365 {
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366 if (err == NGX_EACCES) {
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367 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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368 "\"%s\" is forbidden", ctx->path.data);
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126
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369
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50
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370 return NGX_HTTP_FORBIDDEN;
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371 }
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372
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373 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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374 "\"%s\" is not found", ctx->path.data);
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58
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375
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50
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376 return NGX_HTTP_NOT_FOUND;
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377 }
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378
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379
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58
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380 static void *
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381 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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382 {
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383 ngx_http_index_loc_conf_t *conf;
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384
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385 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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386 if (conf == NULL) {
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387 return NGX_CONF_ERROR;
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388 }
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389
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390 conf->indices = NULL;
|
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230
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391 conf->max_index_len = 0;
|
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58
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392
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393 return conf;
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394 }
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395
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396
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|
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397 static char *
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398 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
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399 {
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|
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400 ngx_http_index_loc_conf_t *prev = parent;
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|
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401 ngx_http_index_loc_conf_t *conf = child;
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402
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403 ngx_http_index_t *index;
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|
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404
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|
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405 if (conf->indices == NULL) {
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406 conf->indices = prev->indices;
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407 conf->max_index_len = prev->max_index_len;
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|
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408 }
|
|
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409
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|
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410 if (conf->indices == NULL) {
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|
|
411 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
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|
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412 if (conf->indices == NULL) {
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|
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413 return NGX_CONF_ERROR;
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|
|
414 }
|
|
|
415
|
|
|
416 index = ngx_array_push(conf->indices);
|
|
|
417 if (index == NULL) {
|
|
|
418 return NGX_CONF_ERROR;
|
|
|
419 }
|
|
|
420
|
|
|
421 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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|
|
422 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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|
|
423 index->lengths = NULL;
|
|
|
424 index->values = NULL;
|
|
|
425
|
|
|
426 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
427
|
|
|
428 return NGX_CONF_OK;
|
|
|
429 }
|
|
|
430
|
|
|
431 return NGX_CONF_OK;
|
|
|
432 }
|
|
|
433
|
|
|
434
|
|
230
|
435 static ngx_int_t
|
|
|
436 ngx_http_index_init(ngx_conf_t *cf)
|
|
|
437 {
|
|
|
438 ngx_http_handler_pt *h;
|
|
|
439 ngx_http_core_main_conf_t *cmcf;
|
|
|
440
|
|
|
441 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
|
|
|
442
|
|
|
443 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
444 if (h == NULL) {
|
|
|
445 return NGX_ERROR;
|
|
|
446 }
|
|
|
447
|
|
|
448 *h = ngx_http_index_handler;
|
|
|
449
|
|
|
450 return NGX_OK;
|
|
|
451 }
|
|
|
452
|
|
|
453
|
|
58
|
454 /* TODO: warn about duplicate indices */
|
|
|
455
|
|
|
456 static char *
|
|
|
457 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
458 {
|
|
|
459 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
460
|
|
230
|
461 ngx_str_t *value;
|
|
58
|
462 ngx_uint_t i, n;
|
|
|
463 ngx_http_index_t *index;
|
|
|
464 ngx_http_script_compile_t sc;
|
|
|
465
|
|
|
466 if (ilcf->indices == NULL) {
|
|
|
467 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
|
|
|
468 if (ilcf->indices == NULL) {
|
|
|
469 return NGX_CONF_ERROR;
|
|
|
470 }
|
|
|
471 }
|
|
|
472
|
|
|
473 value = cf->args->elts;
|
|
|
474
|
|
|
475 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
476 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
|
|
|
477 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
478 "only the last index in \"index\" directive "
|
|
|
479 "may be absolute");
|
|
|
480 return NGX_CONF_ERROR;
|
|
|
481 }
|
|
|
482
|
|
|
483 if (value[i].len == 0) {
|
|
|
484 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
485 "index \"%V\" in \"index\" directive is invalid",
|
|
|
486 &value[1]);
|
|
|
487 return NGX_CONF_ERROR;
|
|
|
488 }
|
|
|
489
|
|
|
490 index = ngx_array_push(ilcf->indices);
|
|
|
491 if (index == NULL) {
|
|
|
492 return NGX_CONF_ERROR;
|
|
|
493 }
|
|
|
494
|
|
|
495 index->name.len = value[i].len;
|
|
|
496 index->name.data = value[i].data;
|
|
|
497 index->lengths = NULL;
|
|
|
498 index->values = NULL;
|
|
|
499
|
|
|
500 n = ngx_http_script_variables_count(&value[i]);
|
|
|
501
|
|
|
502 if (n == 0) {
|
|
230
|
503 if (ilcf->max_index_len < index->name.len) {
|
|
58
|
504 ilcf->max_index_len = index->name.len;
|
|
|
505 }
|
|
|
506
|
|
122
|
507 /* include the terminating '\0' to the length to use ngx_copy() */
|
|
106
|
508 index->name.len++;
|
|
|
509
|
|
58
|
510 continue;
|
|
|
511 }
|
|
|
512
|
|
|
513 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
514
|
|
|
515 sc.cf = cf;
|
|
|
516 sc.source = &value[i];
|
|
|
517 sc.lengths = &index->lengths;
|
|
|
518 sc.values = &index->values;
|
|
|
519 sc.variables = n;
|
|
|
520 sc.complete_lengths = 1;
|
|
|
521 sc.complete_values = 1;
|
|
|
522
|
|
|
523 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
524 return NGX_CONF_ERROR;
|
|
|
525 }
|
|
|
526 }
|
|
|
527
|
|
|
528 return NGX_CONF_OK;
|
|
|
529 }
|
