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50
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 typedef struct {
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58
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13 ngx_str_t name;
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14 ngx_array_t *lengths;
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15 ngx_array_t *values;
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16 } ngx_http_index_t;
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17
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18
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19 typedef struct {
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20 ngx_array_t *indices; /* array of ngx_http_index_t */
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50
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21 size_t max_index_len;
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22 } ngx_http_index_loc_conf_t;
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23
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24
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25 typedef struct {
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58
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26 ngx_uint_t current;
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27 size_t allocated;
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28
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29 u_char *path;
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30 ngx_str_t uri;
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31 ngx_str_t index;
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32
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33 ngx_uint_t tested; /* unsigned tested:1 */
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50
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34 } ngx_http_index_ctx_t;
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35
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36
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37 #define NGX_HTTP_DEFAULT_INDEX "index.html"
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38
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39
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58
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40 static ngx_int_t ngx_http_index_alloc(ngx_http_request_t *r, size_t size,
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41 ngx_http_index_ctx_t *ctx, ngx_http_core_loc_conf_t *clcf);
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50
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42 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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58
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43 ngx_http_index_ctx_t *ctx);
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50
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44 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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45 ngx_http_index_ctx_t *ctx, ngx_err_t err);
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46
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47 static ngx_int_t ngx_http_index_init(ngx_cycle_t *cycle);
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48 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
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49 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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58
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50 void *parent, void *child);
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50
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51 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
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58
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52 void *conf);
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50
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53
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54
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55 static ngx_command_t ngx_http_index_commands[] = {
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56
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57 { ngx_string("index"),
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58
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58 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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59 ngx_http_index_set_index,
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60 NGX_HTTP_LOC_CONF_OFFSET,
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61 0,
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62 NULL },
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63
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64 #if (NGX_HTTP_CACHE)
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65
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66 { ngx_string("index_cache"),
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67 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3,
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68 ngx_http_set_cache_slot,
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69 NGX_HTTP_LOC_CONF_OFFSET,
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70 offsetof(ngx_http_index_loc_conf_t, index_cache),
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71 NULL },
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72
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73 #endif
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74
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75 ngx_null_command
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76 };
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77
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78
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79 ngx_http_module_t ngx_http_index_module_ctx = {
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80 NULL, /* preconfiguration */
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81 NULL, /* postconfiguration */
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82
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83 NULL, /* create main configuration */
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84 NULL, /* init main configuration */
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85
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86 NULL, /* create server configuration */
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87 NULL, /* merge server configuration */
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88
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89 ngx_http_index_create_loc_conf, /* create location configration */
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90 ngx_http_index_merge_loc_conf /* merge location configration */
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91 };
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92
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93
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94 ngx_module_t ngx_http_index_module = {
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95 NGX_MODULE_V1,
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96 &ngx_http_index_module_ctx, /* module context */
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97 ngx_http_index_commands, /* module directives */
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98 NGX_HTTP_MODULE, /* module type */
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99 ngx_http_index_init, /* init module */
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100 NULL /* init process */
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101 };
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102
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103
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104 /*
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105 * Try to open the first index file before the test of the directory existence
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106 * because the valid requests should be many more than invalid ones.
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107 * If open() would fail, then stat() should be more quickly because some data
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108 * is already cached in the kernel.
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109 * Besides, Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR).
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110 * Unix has ENOTDIR error, although it less helpfull - it points only
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111 * that path contains the usual file in place of the directory.
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112 */
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113
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58
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114 static ngx_int_t
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115 ngx_http_index_handler(ngx_http_request_t *r)
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116 {
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117 u_char *name;
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118 size_t len;
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119 ngx_fd_t fd;
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120 ngx_int_t rc;
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121 ngx_err_t err;
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122 ngx_log_t *log;
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123 ngx_uint_t i;
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124 ngx_http_index_t *index;
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125 ngx_http_index_ctx_t *ctx;
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126 ngx_pool_cleanup_file_t *cln;
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127 ngx_http_script_code_pt code;
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128 ngx_http_script_engine_t e;
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129 ngx_http_core_loc_conf_t *clcf;
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130 ngx_http_index_loc_conf_t *ilcf;
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131 ngx_http_script_len_code_pt lcode;
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50
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132
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133 if (r->uri.data[r->uri.len - 1] != '/') {
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134 return NGX_DECLINED;
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135 }
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136
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137 /* TODO: Win32 */
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138 if (r->zero_in_uri) {
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139 return NGX_DECLINED;
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140 }
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141
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142 log = r->connection->log;
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143
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144 /*
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58
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145 * we use context because the handler supports an async file opening,
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146 * and may be called several times
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147 */
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148
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149 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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150 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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151
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152 ctx = ngx_http_get_module_ctx(r, ngx_http_index_module);
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153 if (ctx == NULL) {
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154
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155 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_index_ctx_t));
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156 if (ctx == NULL) {
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157 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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158 }
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159
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160 ngx_http_set_ctx(r, ctx, ngx_http_index_module);
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58
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161 }
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162
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163 index = ilcf->indices->elts;
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164 for (i = ctx->current; i < ilcf->indices->nelts; i++) {
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165
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166 if (index[i].lengths == NULL) {
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167
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168 if (index[i].name.data[0] == '/') {
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169 return ngx_http_internal_redirect(r, &index[i].name, &r->args);
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170 }
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171
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172 len = ilcf->max_index_len;
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173 ctx->index.len = index[i].name.len;
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174
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58
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175 } else {
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176 ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
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177
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178 e.ip = index[i].lengths->elts;
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179 e.request = r;
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180
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181 len = 1;
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182
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183 while (*(uintptr_t *) e.ip) {
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184 lcode = *(ngx_http_script_len_code_pt *) e.ip;
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185 len += lcode(&e);
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186 }
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187
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188 ctx->index.len = len;
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189 }
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190
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191 if (len > ctx->allocated) {
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192 if (ngx_http_index_alloc(r, len, ctx, clcf) != NGX_OK) {
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193 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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194 }
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195 }
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196
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197 if (index[i].values == NULL) {
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198 ngx_memcpy(ctx->index.data, index[i].name.data, ctx->index.len);
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199
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58
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200 } else {
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201 e.ip = index[i].values->elts;
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202 e.pos = ctx->index.data;
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203
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204 while (*(uintptr_t *) e.ip) {
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205 code = *(ngx_http_script_code_pt *) e.ip;
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206 code((ngx_http_script_engine_t *) &e);
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207 }
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208
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209 if (*ctx->index.data == '/') {
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210 ctx->index.len--;
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211 return ngx_http_internal_redirect(r, &ctx->index, &r->args);
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212 }
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213
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214 *e.pos++ = '\0';
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215 }
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216
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217 name = ctx->path;
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218
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219 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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220 "open index \"%s\"", name);
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221
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222 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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223
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224 if (fd == (ngx_fd_t) NGX_AGAIN) {
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225 ctx->current = i;
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226 return NGX_AGAIN;
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227 }
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228
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229 if (fd == NGX_INVALID_FILE) {
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230 err = ngx_errno;
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231
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232 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, err,
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233 ngx_open_file_n " \"%s\" failed", name);
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234
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235 if (err == NGX_ENOTDIR) {
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236 return ngx_http_index_error(r, ctx, err);
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237
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238 } else if (err == NGX_EACCES) {
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239 return ngx_http_index_error(r, ctx, err);
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240 }
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241
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242 if (!ctx->tested) {
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243 rc = ngx_http_index_test_dir(r, ctx);
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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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249 ctx->tested = 1;
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250 }
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251
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252 if (err == NGX_ENOENT) {
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253 continue;
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254 }
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255
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256 ngx_log_error(NGX_LOG_ERR, log, err,
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257 ngx_open_file_n " \"%s\" failed", name);
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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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262
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263 cln = ngx_palloc(r->pool, sizeof(ngx_pool_cleanup_file_t));
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264 if (cln == NULL) {
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265 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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266 }
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267
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268 cln->fd = fd;
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269 cln->name = name;
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270 cln->log = r->pool->log;
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271
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272 if (ngx_pool_cleanup_add(r->pool, ngx_pool_cleanup_file, cln) == NULL) {
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273 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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274 }
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275
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276
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277 if (clcf->alias) {
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278 name = ngx_cpymem(ctx->uri.data, r->uri.data, r->uri.len);
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279 ngx_memcpy(name, ctx->index.data, ctx->index.len - 1);
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280 }
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281
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282 ctx->uri.len = r->uri.len + ctx->index.len - 1;
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283
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284 return ngx_http_internal_redirect(r, &ctx->uri, &r->args);
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285 }
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286
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287 return NGX_DECLINED;
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288 }
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289
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290
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58
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291 static ngx_int_t
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292 ngx_http_index_alloc(ngx_http_request_t *r, size_t size,
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293 ngx_http_index_ctx_t *ctx, ngx_http_core_loc_conf_t *clcf)
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294 {
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58
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295 ctx->allocated = size;
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296
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297 if (!clcf->alias) {
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298 ctx->path = ngx_palloc(r->pool, clcf->root.len + r->uri.len + size);
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299 if (ctx->path == NULL) {
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300 return NGX_ERROR;
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301 }
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302
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303 ctx->uri.data = ngx_cpymem(ctx->path, clcf->root.data, clcf->root.len);
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304
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305 ctx->index.data = ngx_cpymem(ctx->uri.data, r->uri.data, r->uri.len);
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306
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307 } else {
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308 ctx->path = ngx_palloc(r->pool,
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309 clcf->root.len + r->uri.len - clcf->name.len + size);
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310 if (ctx->path == NULL) {
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311 return NGX_ERROR;
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312 }
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313
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314 ctx->uri.data = ngx_palloc(r->pool, r->uri.len + size);
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315 if (ctx->uri.data == NULL) {
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316 return NGX_ERROR;
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317 }
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318
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319 ngx_memcpy(ctx->path, clcf->root.data, clcf->root.len);
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320
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321 ctx->index.data = ngx_cpymem(ctx->path + clcf->root.len,
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322 r->uri.data + clcf->name.len,
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323 r->uri.len - clcf->name.len);
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324 }
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325
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326 return NGX_OK;
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327 }
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328
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329
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330 static ngx_int_t
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331 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx)
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332 {
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333 ngx_err_t err;
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334 ngx_file_info_t fi;
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335
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336 *(ctx->index.data - 1) = '\0';
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337
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338 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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58
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339 "http index check dir: \"%s\"", ctx->path);
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340
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58
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341 if (ngx_file_info(ctx->path, &fi) == -1) {
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50
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342
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343 err = ngx_errno;
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344
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345 if (err == NGX_ENOENT) {
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58
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346 *(ctx->index.data - 1) = '/';
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347 return ngx_http_index_error(r, ctx, err);
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348 }
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349
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350 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
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58
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351 ngx_file_info_n " \"%s\" failed", ctx->path);
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50
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352
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353 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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354 }
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355
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58
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356 *(ctx->index.data - 1) = '/';
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50
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357
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58
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358 if (ngx_is_dir(&fi)) {
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50
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359 return NGX_OK;
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360 }
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361
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58
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362 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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363 "\"%s\" is not a directory", ctx->path);
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364
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365 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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50
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366 }
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367
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368
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58
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369 static ngx_int_t
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370 ngx_http_index_error(ngx_http_request_t *r, ngx_http_index_ctx_t *ctx,
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371 ngx_err_t err)
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50
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372 {
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373 if (err == NGX_EACCES) {
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374 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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58
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375 "\"%s\" is forbidden", ctx->path);
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50
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376
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377 return NGX_HTTP_FORBIDDEN;
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378 }
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379
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380 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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58
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381 "\"%s\" is not found", ctx->path);
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382
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50
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383 return NGX_HTTP_NOT_FOUND;
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384 }
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385
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386
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58
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387 static void *
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388 ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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389 {
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390 ngx_http_index_loc_conf_t *conf;
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391
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392 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t));
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393 if (conf == NULL) {
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394 return NGX_CONF_ERROR;
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395 }
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396
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397 conf->indices = NULL;
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398 conf->max_index_len = 1;
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399
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400 return conf;
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401 }
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402
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403
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404 static char *
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405 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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406 {
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407 ngx_http_index_loc_conf_t *prev = parent;
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408 ngx_http_index_loc_conf_t *conf = child;
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409
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410 ngx_http_index_t *index;
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411
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412 if (conf->indices == NULL) {
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413 conf->indices = prev->indices;
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414 conf->max_index_len = prev->max_index_len;
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415 }
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416
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|
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417 if (conf->indices == NULL) {
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418 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t));
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419 if (conf->indices == NULL) {
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420 return NGX_CONF_ERROR;
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|
|
421 }
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|
|
422
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|
423 index = ngx_array_push(conf->indices);
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424 if (index == NULL) {
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|
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425 return NGX_CONF_ERROR;
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|
|
426 }
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|
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427
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|
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428 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX);
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|
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429 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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|
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430 index->lengths = NULL;
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|
|
431 index->values = NULL;
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|
|
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
|
|
|
442 /* TODO: warn about duplicate indices */
|
|
|
443
|
|
|
444 static char *
|
|
|
445 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
446 {
|
|
|
447 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
448
|
|
|
449 ngx_uint_t i, n;
|
|
|
450 ngx_str_t *value;
|
|
|
451 ngx_http_index_t *index;
|
|
|
452 ngx_http_script_compile_t sc;
|
|
|
453
|
|
|
454 if (ilcf->indices == NULL) {
|
|
|
455 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t));
|
|
|
456 if (ilcf->indices == NULL) {
|
|
|
457 return NGX_CONF_ERROR;
|
|
|
458 }
|
|
|
459 }
|
|
|
460
|
|
|
461 value = cf->args->elts;
|
|
|
462
|
|
|
463 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
464 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) {
|
|
|
465 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
466 "only the last index in \"index\" directive "
|
|
|
467 "may be absolute");
|
|
|
468 return NGX_CONF_ERROR;
|
|
|
469 }
|
|
|
470
|
|
|
471 if (value[i].len == 0) {
|
|
|
472 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
473 "index \"%V\" in \"index\" directive is invalid",
|
|
|
474 &value[1]);
|
|
|
475 return NGX_CONF_ERROR;
|
|
|
476 }
|
|
|
477
|
|
|
478 index = ngx_array_push(ilcf->indices);
|
|
|
479 if (index == NULL) {
|
|
|
480 return NGX_CONF_ERROR;
|
|
|
481 }
|
|
|
482
|
|
|
483 index->name.len = value[i].len;
|
|
|
484 index->name.data = value[i].data;
|
|
|
485 index->lengths = NULL;
|
|
|
486 index->values = NULL;
|
|
|
487
|
|
|
488 n = ngx_http_script_variables_count(&value[i]);
|
|
|
489
|
|
|
490 if (n == 0) {
|
|
|
491 index->name.len++;
|
|
|
492
|
|
|
493 if (ilcf->max_index_len != 0
|
|
|
494 && ilcf->max_index_len < index->name.len)
|
|
|
495 {
|
|
|
496 ilcf->max_index_len = index->name.len;
|
|
|
497 }
|
|
|
498
|
|
|
499 continue;
|
|
|
500 }
|
|
|
501
|
|
|
502 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
503
|
|
|
504 sc.cf = cf;
|
|
|
505 sc.source = &value[i];
|
|
|
506 sc.lengths = &index->lengths;
|
|
|
507 sc.values = &index->values;
|
|
|
508 sc.variables = n;
|
|
|
509 sc.complete_lengths = 1;
|
|
|
510 sc.complete_values = 1;
|
|
|
511
|
|
|
512 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
513 return NGX_CONF_ERROR;
|
|
|
514 }
|
|
|
515
|
|
|
516 ilcf->max_index_len = 0;
|
|
|
517 }
|
|
|
518
|
|
|
519 return NGX_CONF_OK;
|
|
|
520 }
|
|
|
521
|
|
|
522
|
|
|
523 static ngx_int_t
|
|
|
524 ngx_http_index_init(ngx_cycle_t *cycle)
|
|
50
|
525 {
|
|
|
526 ngx_http_handler_pt *h;
|
|
|
527 ngx_http_core_main_conf_t *cmcf;
|
|
|
528
|
|
|
529 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
|
530
|
|
|
531 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
|
|
|
532 if (h == NULL) {
|
|
|
533 return NGX_ERROR;
|
|
|
534 }
|
|
|
535
|
|
|
536 *h = ngx_http_index_handler;
|
|
|
537
|
|
|
538 return NGX_OK;
|
|
|
539 }
|
