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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 #define NGX_HTTP_DEFAULT_INDEX "index.html"
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26
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27
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28 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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344
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29 ngx_http_core_loc_conf_t *clcf, u_char *path, u_char *last);
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397
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30 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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31 ngx_http_core_loc_conf_t *clcf, u_char *file, ngx_err_t err);
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32
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230
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33 static ngx_int_t ngx_http_index_init(ngx_conf_t *cf);
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50
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34 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
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35 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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58
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36 void *parent, void *child);
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50
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37 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
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58
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38 void *conf);
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50
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39
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40
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41 static ngx_command_t ngx_http_index_commands[] = {
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42
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43 { ngx_string("index"),
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58
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44 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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50
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45 ngx_http_index_set_index,
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46 NGX_HTTP_LOC_CONF_OFFSET,
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47 0,
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48 NULL },
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49
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50 ngx_null_command
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51 };
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52
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53
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216
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54 static ngx_http_module_t ngx_http_index_module_ctx = {
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58
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55 NULL, /* preconfiguration */
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230
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56 ngx_http_index_init, /* postconfiguration */
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57
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58 NULL, /* create main configuration */
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59 NULL, /* init main configuration */
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60
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61 NULL, /* create server configuration */
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62 NULL, /* merge server configuration */
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63
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64 ngx_http_index_create_loc_conf, /* create location configration */
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65 ngx_http_index_merge_loc_conf /* merge location configration */
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66 };
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67
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68
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69 ngx_module_t ngx_http_index_module = {
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58
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70 NGX_MODULE_V1,
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50
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71 &ngx_http_index_module_ctx, /* module context */
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72 ngx_http_index_commands, /* module directives */
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73 NGX_HTTP_MODULE, /* module type */
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90
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74 NULL, /* init master */
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230
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75 NULL, /* init module */
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90
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76 NULL, /* init process */
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77 NULL, /* init thread */
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78 NULL, /* exit thread */
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79 NULL, /* exit process */
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80 NULL, /* exit master */
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81 NGX_MODULE_V1_PADDING
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50
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82 };
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83
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84
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85 /*
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491
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86 * Try to open/test the first index file before the test of directory
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87 * existence because valid requests should be much more than invalid ones.
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88 * If the file open()/stat() would fail, then the directory stat() should
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89 * be more quickly because some data is already cached in the kernel.
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90 * Besides, Win32 may return ERROR_PATH_NOT_FOUND (NGX_ENOTDIR) at once.
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91 * Unix has ENOTDIR error, however, it's less helpful than Win32's one:
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92 * it only indicates that path contains an usual file in place of directory.
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93 */
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94
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58
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95 static ngx_int_t
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96 ngx_http_index_handler(ngx_http_request_t *r)
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97 {
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344
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98 u_char *p, *name;
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451
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99 size_t len, root, reserve, allocated;
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58
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100 ngx_int_t rc;
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332
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101 ngx_str_t path, uri;
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344
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102 ngx_uint_t i, dir_tested;
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58
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103 ngx_http_index_t *index;
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332
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104 ngx_open_file_info_t of;
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58
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105 ngx_http_script_code_pt code;
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106 ngx_http_script_engine_t e;
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107 ngx_http_core_loc_conf_t *clcf;
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108 ngx_http_index_loc_conf_t *ilcf;
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109 ngx_http_script_len_code_pt lcode;
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50
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110
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111 if (r->uri.data[r->uri.len - 1] != '/') {
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112 return NGX_DECLINED;
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113 }
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114
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272
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115 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
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116 return NGX_DECLINED;
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117 }
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118
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119 if (r->zero_in_uri) {
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120 return NGX_DECLINED;
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121 }
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122
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332
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123 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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124 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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125
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344
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126 allocated = 0;
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127 root = 0;
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128 dir_tested = 0;
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129 name = NULL;
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451
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130 /* suppress MSVC warning */
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344
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131 path.data = NULL;
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132
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133 index = ilcf->indices->elts;
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344
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134 for (i = 0; i < ilcf->indices->nelts; i++) {
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135
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136 if (index[i].lengths == NULL) {
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137
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58
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138 if (index[i].name.data[0] == '/') {
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139 return ngx_http_internal_redirect(r, &index[i].name, &r->args);
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140 }
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141
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451
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142 reserve = ilcf->max_index_len;
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143 len = index[i].name.len;
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144
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58
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145 } else {
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146 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
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50
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147
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58
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148 e.ip = index[i].lengths->elts;
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149 e.request = r;
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122
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150 e.flushed = 1;
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151
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451
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152 /* 1 is for terminating '\0' as in static names */
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112
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153 len = 1;
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154
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58
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155 while (*(uintptr_t *) e.ip) {
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156 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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157 len += lcode(&e);
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158 }
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50
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159
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112
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160 /* 16 bytes are preallocation */
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161
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451
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162 reserve = len + 16;
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58
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163 }
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164
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451
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165 if (reserve > allocated) {
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106
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166
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451
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167 name = ngx_http_map_uri_to_path(r, &path, &root, reserve);
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344
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168 if (name == NULL) {
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169 return NGX_ERROR;
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170 }
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106
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171
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172 allocated = path.data + path.len - name;
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173 }
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174
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58
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175 if (index[i].values == NULL) {
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106
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176
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177 /* index[i].name.len includes the terminating '\0' */
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178
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344
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179 ngx_memcpy(name, index[i].name.data, index[i].name.len);
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180
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344
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181 path.len = (name + index[i].name.len - 1) - path.data;
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332
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182
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58
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183 } else {
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184 e.ip = index[i].values->elts;
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344
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185 e.pos = name;
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186
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58
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187 while (*(uintptr_t *) e.ip) {
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188 code = *(ngx_http_script_code_pt *) e.ip;
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189 code((ngx_http_script_engine_t *) &e);
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50
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190 }
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191
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344
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192 if (*name == '/') {
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451
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193 uri.len = len - 1;
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344
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194 uri.data = name;
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195 return ngx_http_internal_redirect(r, &uri, &r->args);
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196 }
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197
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332
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198 path.len = e.pos - path.data;
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199
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469
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200 *e.pos = '\0';
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201 }
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202
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439
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203 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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204 "open index \"%V\"", &path);
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205
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384
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206 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
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207
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544
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208 of.read_ahead = clcf->read_ahead;
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392
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209 of.directio = clcf->directio;
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358
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210 of.valid = clcf->open_file_cache_valid;
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211 of.min_uses = clcf->open_file_cache_min_uses;
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491
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212 of.test_only = 1;
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332
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213 of.errors = clcf->open_file_cache_errors;
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214 of.events = clcf->open_file_cache_events;
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112
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215
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362
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216 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
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217 != NGX_OK)
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218 {
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491
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219 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, of.err,
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220 "%s \"%s\" failed", of.failed, path.data);
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221
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332
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222 if (of.err == 0) {
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223 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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224 }
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225
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542
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226 if (of.err == NGX_ENOTDIR
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227 || of.err == NGX_ENAMETOOLONG
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228 || of.err == NGX_EACCES)
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229 {
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397
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230 return ngx_http_index_error(r, clcf, path.data, of.err);
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50
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231 }
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232
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344
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233 if (!dir_tested) {
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234 rc = ngx_http_index_test_dir(r, clcf, path.data, name - 1);
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235
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236 if (rc != NGX_OK) {
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237 return rc;
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238 }
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239
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344
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240 dir_tested = 1;
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50
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241 }
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242
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332
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243 if (of.err == NGX_ENOENT) {
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244 continue;
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245 }
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246
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491
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247 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
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248 "%s \"%s\" failed", of.failed, path.data);
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249
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250 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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251 }
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252
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451
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253 uri.len = r->uri.len + len - 1;
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106
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254
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255 if (!clcf->alias) {
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344
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256 uri.data = path.data + root;
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106
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257
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258 } else {
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382
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259 uri.data = ngx_pnalloc(r->pool, uri.len);
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106
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260 if (uri.data == NULL) {
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261 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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262 }
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263
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344
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264 p = ngx_copy(uri.data, r->uri.data, r->uri.len);
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451
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265 ngx_memcpy(p, name, len - 1);
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50
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266 }
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267
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106
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268 return ngx_http_internal_redirect(r, &uri, &r->args);
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50
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269 }
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270
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271 return NGX_DECLINED;
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272 }
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273
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274
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58
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275 static ngx_int_t
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332
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276 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf,
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344
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277 u_char *path, u_char *last)
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58
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278 {
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332
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279 u_char c;
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344
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280 ngx_str_t dir;
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332
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281 ngx_open_file_info_t of;
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58
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282
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344
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283 c = *last;
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346
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284 if (c != '/' || path == last) {
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344
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285 /* "alias" without trailing slash */
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286 c = *(++last);
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287 }
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288 *last = '\0';
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50
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289
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344
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290 dir.len = last - path;
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291 dir.data = path;
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50
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292
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332
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293 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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344
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294 "http index check dir: \"%V\"", &dir);
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50
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295
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384
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296 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
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297
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332
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298 of.test_dir = 1;
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491
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299 of.test_only = 1;
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358
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300 of.valid = clcf->open_file_cache_valid;
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332
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301 of.errors = clcf->open_file_cache_errors;
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50
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302
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344
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303 if (ngx_open_cached_file(clcf->open_file_cache, &dir, &of, r->pool)
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332
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304 != NGX_OK)
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305 {
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306 if (of.err) {
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307
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308 if (of.err == NGX_ENOENT) {
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344
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309 *last = c;
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397
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310 return ngx_http_index_error(r, clcf, dir.data, NGX_ENOENT);
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332
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311 }
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312
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403
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313 if (of.err == NGX_EACCES) {
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314
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315 *last = c;
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316
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317 /*
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318 * ngx_http_index_test_dir() is called after the first index
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319 * file testing has returned an error distinct from NGX_EACCES.
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320 * This means that directory searching is allowed.
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321 */
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322
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323 return NGX_OK;
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324 }
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325
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332
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326 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
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491
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327 "%s \"%s\" failed", of.failed, dir.data);
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50
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328 }
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329
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330 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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331 }
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332
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344
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333 *last = c;
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50
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334
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332
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335 if (of.is_dir) {
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50
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336 return NGX_OK;
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337 }
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338
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58
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339 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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344
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340 "\"%s\" is not a directory", dir.data);
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58
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341
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342 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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343 }
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344
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345
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58
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346 static ngx_int_t
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397
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347 ngx_http_index_error(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf,
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348 u_char *file, ngx_err_t err)
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50
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349 {
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350 if (err == NGX_EACCES) {
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351 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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344
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352 "\"%s\" is forbidden", file);
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126
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353
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50
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354 return NGX_HTTP_FORBIDDEN;
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355 }
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356
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397
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357 if (clcf->log_not_found) {
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358 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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359 "\"%s\" is not found", file);
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360 }
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58
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361
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50
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362 return NGX_HTTP_NOT_FOUND;
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363 }
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364
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365
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58
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366 static void *
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367 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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368 {
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369 ngx_http_index_loc_conf_t *conf;
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370
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371 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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372 if (conf == NULL) {
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505
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373 return NULL;
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58
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374 }
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375
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376 conf->indices = NULL;
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230
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377 conf->max_index_len = 0;
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58
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378
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379 return conf;
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380 }
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381
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382
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383 static char *
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384 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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385 {
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386 ngx_http_index_loc_conf_t *prev = parent;
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387 ngx_http_index_loc_conf_t *conf = child;
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388
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389 ngx_http_index_t *index;
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390
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391 if (conf->indices == NULL) {
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392 conf->indices = prev->indices;
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393 conf->max_index_len = prev->max_index_len;
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394 }
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395
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396 if (conf->indices == NULL) {
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397 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
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398 if (conf->indices == NULL) {
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399 return NGX_CONF_ERROR;
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400 }
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401
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402 index = ngx_array_push(conf->indices);
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403 if (index == NULL) {
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404 return NGX_CONF_ERROR;
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405 }
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406
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407 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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408 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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409 index->lengths = NULL;
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410 index->values = NULL;
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411
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412 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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413
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414 return NGX_CONF_OK;
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415 }
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416
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417 return NGX_CONF_OK;
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418 }
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419
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420
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230
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421 static ngx_int_t
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422 ngx_http_index_init(ngx_conf_t *cf)
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423 {
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424 ngx_http_handler_pt *h;
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425 ngx_http_core_main_conf_t *cmcf;
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426
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427 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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428
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429 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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430 if (h == NULL) {
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431 return NGX_ERROR;
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432 }
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433
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434 *h = ngx_http_index_handler;
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435
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436 return NGX_OK;
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437 }
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438
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439
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58
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440 /* TODO: warn about duplicate indices */
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441
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442 static char *
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443 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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444 {
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445 ngx_http_index_loc_conf_t *ilcf = conf;
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446
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230
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447 ngx_str_t *value;
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58
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448 ngx_uint_t i, n;
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449 ngx_http_index_t *index;
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450 ngx_http_script_compile_t sc;
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451
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452 if (ilcf->indices == NULL) {
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453 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
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454 if (ilcf->indices == NULL) {
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455 return NGX_CONF_ERROR;
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456 }
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457 }
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458
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459 value = cf->args->elts;
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460
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461 for (i = 1; i < cf->args->nelts; i++) {
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344
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462
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58
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463 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
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344
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464 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
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58
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465 "only the last index in \"index\" directive "
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344
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466 "should be absolute");
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58
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467 }
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468
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469 if (value[i].len == 0) {
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470 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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471 "index \"%V\" in \"index\" directive is invalid",
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472 &value[1]);
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473 return NGX_CONF_ERROR;
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474 }
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475
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476 index = ngx_array_push(ilcf->indices);
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477 if (index == NULL) {
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478 return NGX_CONF_ERROR;
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479 }
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480
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481 index->name.len = value[i].len;
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482 index->name.data = value[i].data;
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483 index->lengths = NULL;
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484 index->values = NULL;
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485
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486 n = ngx_http_script_variables_count(&value[i]);
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487
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488 if (n == 0) {
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230
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489 if (ilcf->max_index_len < index->name.len) {
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58
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490 ilcf->max_index_len = index->name.len;
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491 }
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492
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344
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493 if (index->name.data[0] == '/') {
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494 continue;
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495 }
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496
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451
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497 /* include the terminating '\0' to the length to use ngx_memcpy() */
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106
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498 index->name.len++;
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499
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58
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500 continue;
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501 }
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502
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503 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
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504
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505 sc.cf = cf;
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506 sc.source = &value[i];
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507 sc.lengths = &index->lengths;
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508 sc.values = &index->values;
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509 sc.variables = n;
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510 sc.complete_lengths = 1;
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511 sc.complete_values = 1;
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512
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513 if (ngx_http_script_compile(&sc) != NGX_OK) {
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514 return NGX_CONF_ERROR;
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515 }
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516 }
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517
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518 return NGX_CONF_OK;
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519 }
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