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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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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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332
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41 ngx_http_core_loc_conf_t *clcf, 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 ngx_null_command
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63 };
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64
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65
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216
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66 static ngx_http_module_t ngx_http_index_module_ctx = {
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67 NULL, /* preconfiguration */
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230
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68 ngx_http_index_init, /* postconfiguration */
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69
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70 NULL, /* create main configuration */
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71 NULL, /* init main configuration */
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72
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73 NULL, /* create server configuration */
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74 NULL, /* merge server configuration */
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75
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76 ngx_http_index_create_loc_conf, /* create location configration */
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77 ngx_http_index_merge_loc_conf /* merge location configration */
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78 };
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79
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80
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81 ngx_module_t ngx_http_index_module = {
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58
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82 NGX_MODULE_V1,
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50
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83 &ngx_http_index_module_ctx, /* module context */
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84 ngx_http_index_commands, /* module directives */
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85 NGX_HTTP_MODULE, /* module type */
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90
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86 NULL, /* init master */
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230
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87 NULL, /* init module */
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90
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88 NULL, /* init process */
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89 NULL, /* init thread */
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90 NULL, /* exit thread */
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91 NULL, /* exit process */
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92 NULL, /* exit master */
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93 NGX_MODULE_V1_PADDING
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50
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94 };
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95
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96
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97 /*
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98 * Try to open the first index file before the test of the directory existence
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99 * because the valid requests should be many more than invalid ones.
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100 * If open() would fail, then stat() should be more quickly because some data
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101 * is already cached in the kernel.
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102 * Besides, Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR).
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103 * Unix has ENOTDIR error, although it less helpfull - it points only
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104 * that path contains the usual file in place of the directory.
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105 */
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106
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58
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107 static ngx_int_t
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108 ngx_http_index_handler(ngx_http_request_t *r)
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109 {
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106
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110 u_char *last;
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58
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111 size_t len;
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112 ngx_int_t rc;
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332
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113 ngx_str_t path, uri;
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114 ngx_log_t *log;
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115 ngx_uint_t i;
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116 ngx_http_index_t *index;
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117 ngx_http_index_ctx_t *ctx;
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332
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118 ngx_open_file_info_t of;
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119 ngx_http_script_code_pt code;
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120 ngx_http_script_engine_t e;
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121 ngx_http_core_loc_conf_t *clcf;
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122 ngx_http_index_loc_conf_t *ilcf;
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123 ngx_http_script_len_code_pt lcode;
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124
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125 if (r->uri.data[r->uri.len - 1] != '/') {
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126 return NGX_DECLINED;
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127 }
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128
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272
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129 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
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130 return NGX_DECLINED;
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131 }
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132
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50
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133 /* TODO: Win32 */
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134 if (r->zero_in_uri) {
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135 return NGX_DECLINED;
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136 }
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137
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138 log = r->connection->log;
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139
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332
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140 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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141 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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142
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50
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143 /*
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144 * we use context because the handler supports an async file opening,
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145 * and may be called several times
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146 */
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147
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148 ctx = ngx_http_get_module_ctx(r, ngx_http_index_module);
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149 if (ctx == NULL) {
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150
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151 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_index_ctx_t));
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152 if (ctx == NULL) {
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153 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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154 }
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155
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156 ngx_http_set_ctx(r, ctx, ngx_http_index_module);
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58
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157 }
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50
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158
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159 index = ilcf->indices->elts;
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160 for (i = ctx->current; i < ilcf->indices->nelts; i++) {
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161
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162 if (index[i].lengths == NULL) {
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163
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164 if (index[i].name.data[0] == '/') {
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165 return ngx_http_internal_redirect(r, &index[i].name, &r->args);
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166 }
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167
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168 len = ilcf->max_index_len;
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169 ctx->index.len = index[i].name.len;
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170
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58
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171 } else {
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172 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
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173
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174 e.ip = index[i].lengths->elts;
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175 e.request = r;
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122
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176 e.flushed = 1;
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177
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112
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178 /* 1 byte for terminating '\0' */
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179
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180 len = 1;
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181
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182 while (*(uintptr_t *) e.ip) {
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183 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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184 len += lcode(&e);
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185 }
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186
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187 ctx->index.len = len;
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112
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188
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189 /* 16 bytes are preallocation */
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190
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191 len += 16;
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58
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192 }
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193
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230
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194 if (len > (size_t) (ctx->path.data + ctx->path.len - ctx->index.data)) {
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195
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196 last = ngx_http_map_uri_to_path(r, &ctx->path, &ctx->root, len);
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197 if (last == NULL) {
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198 return NGX_ERROR;
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199 }
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200
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201 ctx->index.data = last;
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202 }
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203
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332
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204 path.data = ctx->path.data;
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205
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206 if (index[i].values == NULL) {
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106
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207
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208 /* index[i].name.len includes the terminating '\0' */
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209
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210 ngx_memcpy(ctx->index.data, index[i].name.data, index[i].name.len);
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211
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332
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212 path.len = (ctx->index.data + index[i].name.len - 1) - path.data;
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213
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58
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214 } else {
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215 e.ip = index[i].values->elts;
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216 e.pos = ctx->index.data;
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217
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58
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218 while (*(uintptr_t *) e.ip) {
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219 code = *(ngx_http_script_code_pt *) e.ip;
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220 code((ngx_http_script_engine_t *) &e);
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221 }
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222
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223 if (*ctx->index.data == '/') {
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224 ctx->index.len--;
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225 return ngx_http_internal_redirect(r, &ctx->index, &r->args);
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226 }
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227
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332
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228 path.len = e.pos - path.data;
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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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332
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234 "open index \"%V\"", &path);
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235
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332
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236 of.test_dir = 0;
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237 of.retest = clcf->open_file_cache_retest;
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238 of.errors = clcf->open_file_cache_errors;
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239 of.events = clcf->open_file_cache_events;
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112
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240
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332
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241 rc = ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool);
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242
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332
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243 #if 0
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244 if (rc == NGX_AGAIN) {
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245 ctx->current = i;
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246 return NGX_AGAIN;
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247 }
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332
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248 #endif
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249
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332
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250 if (rc == NGX_ERROR) {
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251
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332
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252 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, of.err,
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106
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253 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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254
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332
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255 if (of.err == 0) {
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256 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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257 }
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258
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332
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259 if (of.err == NGX_ENOTDIR) {
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260 return ngx_http_index_error(r, ctx, of.err);
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261
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262 } else if (of.err == NGX_EACCES) {
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263 return ngx_http_index_error(r, ctx, of.err);
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264 }
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265
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266 if (!ctx->tested) {
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332
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267 rc = ngx_http_index_test_dir(r, clcf, ctx);
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268
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269 if (rc != NGX_OK) {
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270 return rc;
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271 }
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272
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273 ctx->tested = 1;
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274 }
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275
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332
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276 if (of.err == NGX_ENOENT) {
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277 continue;
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278 }
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279
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332
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280 ngx_log_error(NGX_LOG_ERR, log, of.err,
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106
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281 ngx_open_file_n " \"%s\" failed", ctx->path.data);
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282
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283 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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284 }
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285
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106
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286 uri.len = r->uri.len + ctx->index.len - 1;
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287
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288 if (!clcf->alias) {
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248
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289 uri.data = ctx->path.data + ctx->root;
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106
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290
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291 } else {
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292 uri.data = ngx_palloc(r->pool, uri.len);
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293 if (uri.data == NULL) {
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294 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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295 }
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296
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122
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297 last = ngx_copy(uri.data, r->uri.data, r->uri.len);
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106
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298 ngx_memcpy(last, ctx->index.data, ctx->index.len - 1);
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50
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299 }
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300
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106
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301 return ngx_http_internal_redirect(r, &uri, &r->args);
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50
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302 }
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303
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304 return NGX_DECLINED;
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305 }
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306
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307
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58
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308 static ngx_int_t
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332
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309 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf,
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310 ngx_http_index_ctx_t *ctx)
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311 {
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332
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312 u_char c;
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313 ngx_str_t path;
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314 ngx_uint_t i;
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315 ngx_open_file_info_t of;
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58
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316
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252
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317 c = *(ctx->index.data - 1);
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318 i = (c == '/') ? 1 : 0;
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319 *(ctx->index.data - i) = '\0';
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320
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332
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321 path.len = (ctx->index.data - i) - ctx->path.data;
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322 path.data = ctx->path.data;
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50
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323
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332
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324 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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325 "http index check dir: \"%V\"", &path);
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326
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332
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327 of.test_dir = 1;
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328 of.retest = clcf->open_file_cache_retest;
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329 of.errors = clcf->open_file_cache_errors;
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50
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330
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332
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331 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
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332 != NGX_OK)
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333 {
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334 if (of.err) {
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335
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336 if (of.err == NGX_ENOENT) {
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337 *(ctx->index.data - i) = c;
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338 return ngx_http_index_error(r, ctx, of.err);
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339 }
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340
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341 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
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342 ngx_open_file_n " \"%s\" failed", path.data);
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50
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343 }
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344
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345 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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346 }
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347
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252
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348 *(ctx->index.data - i) = c;
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50
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349
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332
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350 if (of.is_dir) {
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50
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351 return NGX_OK;
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352 }
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353
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58
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354 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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332
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355 "\"%s\" is not a directory", path.data);
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58
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356
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357 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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358 }
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359
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360
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58
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361 static ngx_int_t
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362 ngx_http_index_error(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx,
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363 ngx_err_t err)
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50
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364 {
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365 if (err == NGX_EACCES) {
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366 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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367 "\"%s\" is forbidden", ctx->path.data);
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126
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368
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369 return NGX_HTTP_FORBIDDEN;
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370 }
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371
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372 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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106
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373 "\"%s\" is not found", ctx->path.data);
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58
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374
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50
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375 return NGX_HTTP_NOT_FOUND;
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376 }
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377
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378
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58
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379 static void *
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380 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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381 {
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382 ngx_http_index_loc_conf_t *conf;
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383
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384 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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385 if (conf == NULL) {
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386 return NGX_CONF_ERROR;
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387 }
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388
|
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389 conf->indices = NULL;
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230
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390 conf->max_index_len = 0;
|
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58
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391
|
|
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392 return conf;
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|
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393 }
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394
|
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395
|
|
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396 static char *
|
|
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397 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
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398 {
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|
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399 ngx_http_index_loc_conf_t *prev = parent;
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|
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400 ngx_http_index_loc_conf_t *conf = child;
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|
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401
|
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402 ngx_http_index_t *index;
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|
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403
|
|
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404 if (conf->indices == NULL) {
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405 conf->indices = prev->indices;
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406 conf->max_index_len = prev->max_index_len;
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|
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407 }
|
|
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408
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|
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409 if (conf->indices == NULL) {
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|
|
410 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
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|
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411 if (conf->indices == NULL) {
|
|
|
412 return NGX_CONF_ERROR;
|
|
|
413 }
|
|
|
414
|
|
|
415 index = ngx_array_push(conf->indices);
|
|
|
416 if (index == NULL) {
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|
|
417 return NGX_CONF_ERROR;
|
|
|
418 }
|
|
|
419
|
|
|
420 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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|
|
421 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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|
|
422 index->lengths = NULL;
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|
|
423 index->values = NULL;
|
|
|
424
|
|
|
425 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
426
|
|
|
427 return NGX_CONF_OK;
|
|
|
428 }
|
|
|
429
|
|
|
430 return NGX_CONF_OK;
|
|
|
431 }
|
|
|
432
|
|
|
433
|
|
230
|
434 static ngx_int_t
|
|
|
435 ngx_http_index_init(ngx_conf_t *cf)
|
|
|
436 {
|
|
|
437 ngx_http_handler_pt *h;
|
|
|
438 ngx_http_core_main_conf_t *cmcf;
|
|
|
439
|
|
|
440 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
|
|
|
441
|
|
|
442 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
443 if (h == NULL) {
|
|
|
444 return NGX_ERROR;
|
|
|
445 }
|
|
|
446
|
|
|
447 *h = ngx_http_index_handler;
|
|
|
448
|
|
|
449 return NGX_OK;
|
|
|
450 }
|
|
|
451
|
|
|
452
|
|
58
|
453 /* TODO: warn about duplicate indices */
|
|
|
454
|
|
|
455 static char *
|
|
|
456 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
457 {
|
|
|
458 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
459
|
|
230
|
460 ngx_str_t *value;
|
|
58
|
461 ngx_uint_t i, n;
|
|
|
462 ngx_http_index_t *index;
|
|
|
463 ngx_http_script_compile_t sc;
|
|
|
464
|
|
|
465 if (ilcf->indices == NULL) {
|
|
|
466 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
|
|
|
467 if (ilcf->indices == NULL) {
|
|
|
468 return NGX_CONF_ERROR;
|
|
|
469 }
|
|
|
470 }
|
|
|
471
|
|
|
472 value = cf->args->elts;
|
|
|
473
|
|
|
474 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
475 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
|
|
|
476 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
477 "only the last index in \"index\" directive "
|
|
|
478 "may be absolute");
|
|
|
479 return NGX_CONF_ERROR;
|
|
|
480 }
|
|
|
481
|
|
|
482 if (value[i].len == 0) {
|
|
|
483 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
484 "index \"%V\" in \"index\" directive is invalid",
|
|
|
485 &value[1]);
|
|
|
486 return NGX_CONF_ERROR;
|
|
|
487 }
|
|
|
488
|
|
|
489 index = ngx_array_push(ilcf->indices);
|
|
|
490 if (index == NULL) {
|
|
|
491 return NGX_CONF_ERROR;
|
|
|
492 }
|
|
|
493
|
|
|
494 index->name.len = value[i].len;
|
|
|
495 index->name.data = value[i].data;
|
|
|
496 index->lengths = NULL;
|
|
|
497 index->values = NULL;
|
|
|
498
|
|
|
499 n = ngx_http_script_variables_count(&value[i]);
|
|
|
500
|
|
|
501 if (n == 0) {
|
|
230
|
502 if (ilcf->max_index_len < index->name.len) {
|
|
58
|
503 ilcf->max_index_len = index->name.len;
|
|
|
504 }
|
|
|
505
|
|
122
|
506 /* include the terminating '\0' to the length to use ngx_copy() */
|
|
106
|
507 index->name.len++;
|
|
|
508
|
|
58
|
509 continue;
|
|
|
510 }
|
|
|
511
|
|
|
512 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
513
|
|
|
514 sc.cf = cf;
|
|
|
515 sc.source = &value[i];
|
|
|
516 sc.lengths = &index->lengths;
|
|
|
517 sc.values = &index->values;
|
|
|
518 sc.variables = n;
|
|
|
519 sc.complete_lengths = 1;
|
|
|
520 sc.complete_values = 1;
|
|
|
521
|
|
|
522 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
523 return NGX_CONF_ERROR;
|
|
|
524 }
|
|
|
525 }
|
|
|
526
|
|
|
527 return NGX_CONF_OK;
|
|
|
528 }
|
