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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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660
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4 * Copyright (C) Nginx, Inc.
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50
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_http.h>
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11
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12
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13 typedef struct {
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58
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14 ngx_str_t name;
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15 ngx_array_t *lengths;
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16 ngx_array_t *values;
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17 } ngx_http_index_t;
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18
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19
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20 typedef struct {
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21 ngx_array_t *indices; /* array of ngx_http_index_t */
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50
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22 size_t max_index_len;
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23 } ngx_http_index_loc_conf_t;
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24
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25
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26 #define NGX_HTTP_DEFAULT_INDEX "index.html"
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27
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28
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29 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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344
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30 ngx_http_core_loc_conf_t *clcf, u_char *path, u_char *last);
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394
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31 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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32 ngx_http_core_loc_conf_t *clcf, u_char *file, ngx_err_t err);
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50
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33
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230
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34 static ngx_int_t ngx_http_index_init(ngx_conf_t *cf);
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50
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35 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
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36 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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58
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37 void *parent, void *child);
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50
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38 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
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58
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39 void *conf);
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40
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41
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42 static ngx_command_t ngx_http_index_commands[] = {
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43
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44 { ngx_string("index"),
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45 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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46 ngx_http_index_set_index,
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47 NGX_HTTP_LOC_CONF_OFFSET,
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48 0,
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49 NULL },
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50
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51 ngx_null_command
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52 };
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53
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54
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216
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55 static ngx_http_module_t ngx_http_index_module_ctx = {
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58
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56 NULL, /* preconfiguration */
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230
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57 ngx_http_index_init, /* postconfiguration */
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58
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59 NULL, /* create main configuration */
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60 NULL, /* init main configuration */
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61
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62 NULL, /* create server configuration */
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63 NULL, /* merge server configuration */
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64
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664
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65 ngx_http_index_create_loc_conf, /* create location configuration */
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66 ngx_http_index_merge_loc_conf /* merge location configuration */
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67 };
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68
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69
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70 ngx_module_t ngx_http_index_module = {
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58
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71 NGX_MODULE_V1,
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72 &ngx_http_index_module_ctx, /* module context */
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73 ngx_http_index_commands, /* module directives */
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74 NGX_HTTP_MODULE, /* module type */
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90
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75 NULL, /* init master */
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230
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76 NULL, /* init module */
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90
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77 NULL, /* init process */
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78 NULL, /* init thread */
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79 NULL, /* exit thread */
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80 NULL, /* exit process */
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81 NULL, /* exit master */
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82 NGX_MODULE_V1_PADDING
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50
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83 };
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84
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85
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86 /*
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482
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87 * Try to open/test the first index file before the test of directory
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88 * existence because valid requests should be much more than invalid ones.
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89 * If the file open()/stat() would fail, then the directory stat() should
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90 * be more quickly because some data is already cached in the kernel.
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91 * Besides, Win32 may return ERROR_PATH_NOT_FOUND (NGX_ENOTDIR) at once.
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92 * Unix has ENOTDIR error, however, it's less helpful than Win32's one:
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93 * it only indicates that path contains an usual file in place of directory.
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94 */
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95
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58
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96 static ngx_int_t
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97 ngx_http_index_handler(ngx_http_request_t *r)
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98 {
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344
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99 u_char *p, *name;
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442
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100 size_t len, root, reserve, allocated;
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58
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101 ngx_int_t rc;
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332
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102 ngx_str_t path, uri;
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344
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103 ngx_uint_t i, dir_tested;
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104 ngx_http_index_t *index;
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332
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105 ngx_open_file_info_t of;
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58
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106 ngx_http_script_code_pt code;
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107 ngx_http_script_engine_t e;
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108 ngx_http_core_loc_conf_t *clcf;
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109 ngx_http_index_loc_conf_t *ilcf;
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110 ngx_http_script_len_code_pt lcode;
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50
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111
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112 if (r->uri.data[r->uri.len - 1] != '/') {
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113 return NGX_DECLINED;
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114 }
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115
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272
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116 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
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117 return NGX_DECLINED;
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118 }
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119
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332
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120 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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121 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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122
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344
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123 allocated = 0;
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124 root = 0;
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125 dir_tested = 0;
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126 name = NULL;
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442
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127 /* suppress MSVC warning */
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344
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128 path.data = NULL;
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129
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130 index = ilcf->indices->elts;
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344
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131 for (i = 0; i < ilcf->indices->nelts; i++) {
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132
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133 if (index[i].lengths == NULL) {
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134
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135 if (index[i].name.data[0] == '/') {
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136 return ngx_http_internal_redirect(r, &index[i].name, &r->args);
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137 }
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138
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442
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139 reserve = ilcf->max_index_len;
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140 len = index[i].name.len;
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141
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58
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142 } else {
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143 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
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144
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145 e.ip = index[i].lengths->elts;
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146 e.request = r;
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122
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147 e.flushed = 1;
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58
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148
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442
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149 /* 1 is for terminating '\0' as in static names */
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112
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150 len = 1;
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151
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58
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152 while (*(uintptr_t *) e.ip) {
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153 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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154 len += lcode(&e);
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155 }
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156
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112
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157 /* 16 bytes are preallocation */
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158
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442
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159 reserve = len + 16;
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58
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160 }
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161
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442
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162 if (reserve > allocated) {
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106
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163
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442
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164 name = ngx_http_map_uri_to_path(r, &path, &root, reserve);
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344
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165 if (name == NULL) {
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106
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166 return NGX_ERROR;
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167 }
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106
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168
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442
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169 allocated = path.data + path.len - name;
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170 }
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171
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172 if (index[i].values == NULL) {
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106
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173
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174 /* index[i].name.len includes the terminating '\0' */
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175
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344
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176 ngx_memcpy(name, index[i].name.data, index[i].name.len);
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177
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344
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178 path.len = (name + index[i].name.len - 1) - path.data;
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332
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179
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58
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180 } else {
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181 e.ip = index[i].values->elts;
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344
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182 e.pos = name;
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183
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58
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184 while (*(uintptr_t *) e.ip) {
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185 code = *(ngx_http_script_code_pt *) e.ip;
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186 code((ngx_http_script_engine_t *) &e);
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187 }
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188
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344
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189 if (*name == '/') {
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442
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190 uri.len = len - 1;
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344
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191 uri.data = name;
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192 return ngx_http_internal_redirect(r, &uri, &r->args);
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193 }
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194
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332
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195 path.len = e.pos - path.data;
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196
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460
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197 *e.pos = '\0';
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198 }
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199
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430
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200 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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201 "open index \"%V\"", &path);
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202
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384
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203 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
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204
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532
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205 of.read_ahead = clcf->read_ahead;
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390
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206 of.directio = clcf->directio;
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358
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207 of.valid = clcf->open_file_cache_valid;
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208 of.min_uses = clcf->open_file_cache_min_uses;
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482
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209 of.test_only = 1;
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332
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210 of.errors = clcf->open_file_cache_errors;
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211 of.events = clcf->open_file_cache_events;
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664
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212
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213 if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
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214 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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215 }
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112
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216
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362
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217 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
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218 != NGX_OK)
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219 {
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482
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220 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, of.err,
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221 "%s \"%s\" failed", of.failed, path.data);
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222
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332
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223 if (of.err == 0) {
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224 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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225 }
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226
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662
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227 #if (NGX_HAVE_OPENAT)
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228 if (of.err == NGX_EMLINK
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229 || of.err == NGX_ELOOP)
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230 {
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231 return NGX_HTTP_FORBIDDEN;
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232 }
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233 #endif
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234
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530
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235 if (of.err == NGX_ENOTDIR
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236 || of.err == NGX_ENAMETOOLONG
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237 || of.err == NGX_EACCES)
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238 {
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394
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239 return ngx_http_index_error(r, clcf, path.data, of.err);
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240 }
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241
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344
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242 if (!dir_tested) {
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243 rc = ngx_http_index_test_dir(r, clcf, path.data, name - 1);
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244
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245 if (rc != NGX_OK) {
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246 return rc;
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247 }
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248
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344
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249 dir_tested = 1;
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50
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250 }
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251
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332
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252 if (of.err == NGX_ENOENT) {
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253 continue;
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254 }
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255
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482
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256 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
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257 "%s \"%s\" failed", of.failed, path.data);
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258
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259 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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260 }
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261
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442
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262 uri.len = r->uri.len + len - 1;
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106
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263
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264 if (!clcf->alias) {
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344
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265 uri.data = path.data + root;
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106
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266
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267 } else {
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382
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268 uri.data = ngx_pnalloc(r->pool, uri.len);
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106
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269 if (uri.data == NULL) {
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270 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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271 }
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272
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344
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273 p = ngx_copy(uri.data, r->uri.data, r->uri.len);
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442
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274 ngx_memcpy(p, name, len - 1);
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50
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275 }
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276
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106
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277 return ngx_http_internal_redirect(r, &uri, &r->args);
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50
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278 }
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279
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280 return NGX_DECLINED;
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281 }
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282
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283
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58
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284 static ngx_int_t
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332
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285 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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286 u_char *path, u_char *last)
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58
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287 {
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332
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288 u_char c;
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344
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289 ngx_str_t dir;
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332
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290 ngx_open_file_info_t of;
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58
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291
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344
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292 c = *last;
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346
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293 if (c != '/' || path == last) {
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344
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294 /* "alias" without trailing slash */
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295 c = *(++last);
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296 }
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297 *last = '\0';
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50
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298
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344
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299 dir.len = last - path;
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300 dir.data = path;
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301
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332
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302 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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344
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303 "http index check dir: \"%V\"", &dir);
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50
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304
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384
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305 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
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306
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332
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307 of.test_dir = 1;
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482
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308 of.test_only = 1;
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358
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309 of.valid = clcf->open_file_cache_valid;
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332
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310 of.errors = clcf->open_file_cache_errors;
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664
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311
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312 if (ngx_http_set_disable_symlinks(r, clcf, &dir, &of) != NGX_OK) {
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313 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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314 }
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50
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315
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344
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316 if (ngx_open_cached_file(clcf->open_file_cache, &dir, &of, r->pool)
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332
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317 != NGX_OK)
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318 {
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319 if (of.err) {
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320
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662
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321 #if (NGX_HAVE_OPENAT)
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322 if (of.err == NGX_EMLINK
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323 || of.err == NGX_ELOOP)
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324 {
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325 return NGX_HTTP_FORBIDDEN;
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326 }
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327 #endif
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328
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332
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329 if (of.err == NGX_ENOENT) {
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344
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330 *last = c;
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394
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331 return ngx_http_index_error(r, clcf, dir.data, NGX_ENOENT);
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332
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332 }
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333
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398
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334 if (of.err == NGX_EACCES) {
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335
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336 *last = c;
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337
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338 /*
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339 * ngx_http_index_test_dir() is called after the first index
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340 * file testing has returned an error distinct from NGX_EACCES.
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341 * This means that directory searching is allowed.
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342 */
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343
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344 return NGX_OK;
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345 }
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346
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332
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347 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
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482
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348 "%s \"%s\" failed", of.failed, dir.data);
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50
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349 }
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350
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351 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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352 }
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353
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344
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354 *last = c;
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50
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355
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332
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356 if (of.is_dir) {
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50
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357 return NGX_OK;
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358 }
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359
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58
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360 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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344
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361 "\"%s\" is not a directory", dir.data);
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58
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362
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363 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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364 }
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365
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366
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58
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367 static ngx_int_t
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394
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368 ngx_http_index_error(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf,
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369 u_char *file, ngx_err_t err)
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50
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370 {
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371 if (err == NGX_EACCES) {
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372 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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344
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373 "\"%s\" is forbidden", file);
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126
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374
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50
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375 return NGX_HTTP_FORBIDDEN;
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376 }
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377
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394
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378 if (clcf->log_not_found) {
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379 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
|
|
|
380 "\"%s\" is not found", file);
|
|
|
381 }
|
|
58
|
382
|
|
50
|
383 return NGX_HTTP_NOT_FOUND;
|
|
|
384 }
|
|
|
385
|
|
|
386
|
|
58
|
387 static void *
|
|
|
388 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
|
|
|
389 {
|
|
|
390 ngx_http_index_loc_conf_t *conf;
|
|
|
391
|
|
|
392 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
|
|
|
393 if (conf == NULL) {
|
|
496
|
394 return NULL;
|
|
58
|
395 }
|
|
|
396
|
|
|
397 conf->indices = NULL;
|
|
230
|
398 conf->max_index_len = 0;
|
|
58
|
399
|
|
|
400 return conf;
|
|
|
401 }
|
|
|
402
|
|
|
403
|
|
|
404 static char *
|
|
|
405 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
406 {
|
|
|
407 ngx_http_index_loc_conf_t *prev = parent;
|
|
|
408 ngx_http_index_loc_conf_t *conf = child;
|
|
|
409
|
|
|
410 ngx_http_index_t *index;
|
|
|
411
|
|
|
412 if (conf->indices == NULL) {
|
|
|
413 conf->indices = prev->indices;
|
|
|
414 conf->max_index_len = prev->max_index_len;
|
|
|
415 }
|
|
|
416
|
|
|
417 if (conf->indices == NULL) {
|
|
|
418 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
|
|
|
419 if (conf->indices == NULL) {
|
|
|
420 return NGX_CONF_ERROR;
|
|
|
421 }
|
|
|
422
|
|
|
423 index = ngx_array_push(conf->indices);
|
|
|
424 if (index == NULL) {
|
|
|
425 return NGX_CONF_ERROR;
|
|
|
426 }
|
|
|
427
|
|
|
428 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
429 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
|
|
|
430 index->lengths = NULL;
|
|
|
431 index->values = NULL;
|
|
|
432
|
|
|
433 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
434
|
|
|
435 return NGX_CONF_OK;
|
|
|
436 }
|
|
|
437
|
|
|
438 return NGX_CONF_OK;
|
|
|
439 }
|
|
|
440
|
|
|
441
|
|
230
|
442 static ngx_int_t
|
|
|
443 ngx_http_index_init(ngx_conf_t *cf)
|
|
|
444 {
|
|
|
445 ngx_http_handler_pt *h;
|
|
|
446 ngx_http_core_main_conf_t *cmcf;
|
|
|
447
|
|
|
448 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
|
|
|
449
|
|
|
450 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
451 if (h == NULL) {
|
|
|
452 return NGX_ERROR;
|
|
|
453 }
|
|
|
454
|
|
|
455 *h = ngx_http_index_handler;
|
|
|
456
|
|
|
457 return NGX_OK;
|
|
|
458 }
|
|
|
459
|
|
|
460
|
|
58
|
461 /* TODO: warn about duplicate indices */
|
|
|
462
|
|
|
463 static char *
|
|
|
464 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
465 {
|
|
|
466 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
467
|
|
230
|
468 ngx_str_t *value;
|
|
58
|
469 ngx_uint_t i, n;
|
|
|
470 ngx_http_index_t *index;
|
|
|
471 ngx_http_script_compile_t sc;
|
|
|
472
|
|
|
473 if (ilcf->indices == NULL) {
|
|
|
474 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
|
|
|
475 if (ilcf->indices == NULL) {
|
|
|
476 return NGX_CONF_ERROR;
|
|
|
477 }
|
|
|
478 }
|
|
|
479
|
|
|
480 value = cf->args->elts;
|
|
|
481
|
|
|
482 for (i = 1; i < cf->args->nelts; i++) {
|
|
344
|
483
|
|
58
|
484 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
|
|
344
|
485 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
|
58
|
486 "only the last index in \"index\" directive "
|
|
344
|
487 "should be absolute");
|
|
58
|
488 }
|
|
|
489
|
|
|
490 if (value[i].len == 0) {
|
|
|
491 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
492 "index \"%V\" in \"index\" directive is invalid",
|
|
|
493 &value[1]);
|
|
|
494 return NGX_CONF_ERROR;
|
|
|
495 }
|
|
|
496
|
|
|
497 index = ngx_array_push(ilcf->indices);
|
|
|
498 if (index == NULL) {
|
|
|
499 return NGX_CONF_ERROR;
|
|
|
500 }
|
|
|
501
|
|
|
502 index->name.len = value[i].len;
|
|
|
503 index->name.data = value[i].data;
|
|
|
504 index->lengths = NULL;
|
|
|
505 index->values = NULL;
|
|
|
506
|
|
|
507 n = ngx_http_script_variables_count(&value[i]);
|
|
|
508
|
|
|
509 if (n == 0) {
|
|
230
|
510 if (ilcf->max_index_len < index->name.len) {
|
|
58
|
511 ilcf->max_index_len = index->name.len;
|
|
|
512 }
|
|
|
513
|
|
344
|
514 if (index->name.data[0] == '/') {
|
|
|
515 continue;
|
|
|
516 }
|
|
|
517
|
|
442
|
518 /* include the terminating '\0' to the length to use ngx_memcpy() */
|
|
106
|
519 index->name.len++;
|
|
|
520
|
|
58
|
521 continue;
|
|
|
522 }
|
|
|
523
|
|
|
524 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
525
|
|
|
526 sc.cf = cf;
|
|
|
527 sc.source = &value[i];
|
|
|
528 sc.lengths = &index->lengths;
|
|
|
529 sc.values = &index->values;
|
|
|
530 sc.variables = n;
|
|
|
531 sc.complete_lengths = 1;
|
|
|
532 sc.complete_values = 1;
|
|
|
533
|
|
|
534 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
535 return NGX_CONF_ERROR;
|
|
|
536 }
|
|
|
537 }
|
|
|
538
|
|
|
539 return NGX_CONF_OK;
|
|
|
540 }
|
