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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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13 ngx_array_t indices;
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14 size_t max_index_len;
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15 ngx_http_cache_hash_t *index_cache;
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16 } ngx_http_index_loc_conf_t;
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17
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18
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19 typedef struct {
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20 ngx_uint_t index;
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21 u_char *last;
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22 ngx_str_t path;
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23 ngx_str_t redirect;
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24 ngx_http_cache_t *cache;
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25 unsigned tested:1;
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26 } ngx_http_index_ctx_t;
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27
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28
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29 #define NGX_HTTP_DEFAULT_INDEX "index.html"
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30
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31
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32 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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33 ngx_http_index_ctx_t *ctx);
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34 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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35 ngx_http_index_ctx_t *ctx, ngx_err_t err);
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36
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37 static ngx_int_t ngx_http_index_init(ngx_cycle_t *cycle);
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38 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf);
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39 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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40 void *parent, void *child);
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41 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
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42 void *conf);
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43
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44
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45 static ngx_command_t ngx_http_index_commands[] = {
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46
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47 { ngx_string("index"),
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48 NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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49 ngx_http_index_set_index,
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50 NGX_HTTP_LOC_CONF_OFFSET,
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51 0,
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52 NULL },
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53
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54 #if (NGX_HTTP_CACHE)
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55
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56 { ngx_string("index_cache"),
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57 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3,
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58 ngx_http_set_cache_slot,
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59 NGX_HTTP_LOC_CONF_OFFSET,
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60 offsetof(ngx_http_index_loc_conf_t, index_cache),
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61 NULL },
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62
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63 #endif
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64
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65 ngx_null_command
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66 };
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67
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68
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69 ngx_http_module_t ngx_http_index_module_ctx = {
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70 NULL, /* pre conf */
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71
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72 NULL, /* create main configuration */
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73 NULL, /* init main configuration */
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74
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75 NULL, /* create server configuration */
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76 NULL, /* merge server configuration */
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77
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78 ngx_http_index_create_loc_conf, /* create location configration */
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79 ngx_http_index_merge_loc_conf /* merge location configration */
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80 };
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81
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82
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83 ngx_module_t ngx_http_index_module = {
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84 NGX_MODULE,
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85 &ngx_http_index_module_ctx, /* module context */
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86 ngx_http_index_commands, /* module directives */
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87 NGX_HTTP_MODULE, /* module type */
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88 ngx_http_index_init, /* init module */
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89 NULL /* init child */
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90 };
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91
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92
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93 /*
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94 * Try to open the first index file before the test of the directory existence
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95 * because the valid requests should be many more than invalid ones.
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96 * If open() failed then stat() should be more quickly because some data
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97 * is already cached in the kernel.
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98 * Besides Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR).
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99 * Unix has ENOTDIR error, although it less helpfull - it shows only
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100 * that path contains the usual file in place of the directory.
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101 */
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102
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6
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103 static ngx_int_t ngx_http_index_handler(ngx_http_request_t *r)
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0
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104 {
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105 u_char *name;
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106 ngx_fd_t fd;
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107 ngx_int_t rc;
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108 ngx_str_t *index;
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109 ngx_err_t err;
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110 ngx_log_t *log;
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111 ngx_http_index_ctx_t *ctx;
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112 ngx_http_core_loc_conf_t *clcf;
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113 ngx_http_index_loc_conf_t *ilcf;
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114 #if (NGX_HTTP_CACHE0)
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115 /* crc must be in ctx !! */
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116 uint32_t crc;
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117 #endif
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118
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119 if (r->uri.data[r->uri.len - 1] != '/') {
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120 return NGX_DECLINED;
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121 }
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122
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123 log = r->connection->log;
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124
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125 /*
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126 * we use context because the handler supports an async file opening
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127 * and thus can be called several times
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128 */
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129
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130 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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131 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module);
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132
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133 ctx = ngx_http_get_module_ctx(r, ngx_http_index_module);
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134 if (ctx == NULL) {
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135 ngx_http_create_ctx(r, ctx, ngx_http_index_module,
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136 sizeof(ngx_http_index_ctx_t),
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137 NGX_HTTP_INTERNAL_SERVER_ERROR);
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138
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139 #if (NGX_HTTP_CACHE)
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140
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141 if (ilcf->index_cache) {
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142 ctx->cache = ngx_http_cache_get(ilcf->index_cache, NULL,
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143 &r->uri, &crc);
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144
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145 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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146 "http index cache get: " PTR_FMT, ctx->cache);
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147
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148 if (ctx->cache && !ctx->cache->expired) {
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149
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150 ctx->cache->accessed = ngx_cached_time;
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151
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152 ctx->redirect.len = ctx->cache->data.value.len;
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153 ctx->redirect.data = ngx_palloc(r->pool, ctx->redirect.len + 1);
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154 if (ctx->redirect.data == NULL) {
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155 ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log);
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156 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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157 }
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158
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159 ngx_memcpy(ctx->redirect.data, ctx->cache->data.value.data,
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160 ctx->redirect.len + 1);
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161 ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log);
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162
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163 return ngx_http_internal_redirect(r, &ctx->redirect, NULL);
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164 }
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165 }
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166
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167 #endif
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168
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169 #if 0
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170 ctx->path.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len
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171 + ilcf->max_index_len
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172 - clcf->alias * clcf->name.len);
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173 if (ctx->path.data == NULL) {
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174 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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175 }
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176
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177 ctx->redirect.data = ngx_cpymem(ctx->path.data, clcf->root.data,
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178 clcf->root.len);
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179 #endif
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180
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181 if (clcf->alias) {
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182 ctx->path.data = ngx_palloc(r->pool, clcf->root.len
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183 + r->uri.len + 1 - clcf->name.len
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184 + ilcf->max_index_len);
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185 if (ctx->path.data == NULL) {
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186 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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187 }
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188
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189 ctx->redirect.data = ngx_palloc(r->pool, r->uri.len
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190 + ilcf->max_index_len);
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191 if (ctx->redirect.data == NULL) {
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192 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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193 }
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194
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195 ngx_memcpy(ctx->path.data, clcf->root.data, clcf->root.len);
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196
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197 ctx->last = ngx_cpystrn(ctx->path.data + clcf->root.len,
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198 r->uri.data + clcf->name.len,
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199 r->uri.len + 1 - clcf->name.len);
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200
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201 #if 0
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202 /*
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203 * aliases usually have trailling "/",
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204 * set it in the start of the possible redirect
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205 */
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206
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207 if (*ctx->redirect.data != '/') {
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208 ctx->redirect.data--;
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209 }
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210 #endif
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211
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212 } else {
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213 ctx->path.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len
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214 + ilcf->max_index_len);
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215 if (ctx->path.data == NULL) {
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216 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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217 }
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218
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219 ctx->redirect.data = ngx_cpymem(ctx->path.data, clcf->root.data,
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220 clcf->root.len);
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221
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222 ctx->last = ngx_cpystrn(ctx->redirect.data, r->uri.data,
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223 r->uri.len + 1);
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224 }
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225 }
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226
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227 ctx->path.len = ctx->last - ctx->path.data;
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228
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229 index = ilcf->indices.elts;
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230 for (/* void */; ctx->index < ilcf->indices.nelts; ctx->index++) {
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231
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232 if (index[ctx->index].data[0] == '/') {
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233 name = index[ctx->index].data;
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234
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235 } else {
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236 ngx_memcpy(ctx->last, index[ctx->index].data,
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237 index[ctx->index].len + 1);
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238 name = ctx->path.data;
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239 }
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240
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241 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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242 "open index \"%s\"", name);
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243
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244 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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245
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246 if (fd == (ngx_fd_t) NGX_AGAIN) {
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247 return NGX_AGAIN;
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248 }
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249
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250 if (fd == NGX_INVALID_FILE) {
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251 err = ngx_errno;
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252
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253 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, err,
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254 ngx_open_file_n " %s failed", name);
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255
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256 if (err == NGX_ENOTDIR) {
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257 return ngx_http_index_error(r, ctx, err);
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258
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259 } else if (err == NGX_EACCES) {
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260 return ngx_http_index_error(r, ctx, err);
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261 }
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262
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263 if (!ctx->tested) {
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264 rc = ngx_http_index_test_dir(r, ctx);
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265
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266 if (rc != NGX_OK) {
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267 return rc;
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268 }
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269
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270 ctx->tested = 1;
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271 }
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272
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273 if (err == NGX_ENOENT) {
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274 continue;
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275 }
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276
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277 ngx_log_error(NGX_LOG_ERR, log, err,
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278 ngx_open_file_n " %s failed", name);
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279
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280 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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281 }
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282
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283
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284 /* STUB: open file cache */
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285
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286 r->file.name.data = name;
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287 r->file.fd = fd;
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288
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289 if (index[ctx->index].data[0] == '/') {
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290 r->file.name.len = index[ctx->index].len;
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291 ctx->redirect.len = index[ctx->index].len;
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292 ctx->redirect.data = index[ctx->index].data;
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293
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294 } else {
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295 if (clcf->alias) {
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296 name = ngx_cpymem(ctx->redirect.data, r->uri.data, r->uri.len);
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297 ngx_memcpy(name, index[ctx->index].data,
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298 index[ctx->index].len + 1);
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299 }
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300
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301 ctx->redirect.len = r->uri.len + index[ctx->index].len;
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302 r->file.name.len = clcf->root.len + r->uri.len
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303 - clcf->alias * clcf->name.len
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304 + index[ctx->index].len;
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305 }
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306
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307 /**/
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308
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309
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310 #if (NGX_HTTP_CACHE)
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311
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312 if (ilcf->index_cache) {
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313
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314 if (ctx->cache) {
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315 if (ctx->redirect.len == ctx->cache->data.value.len
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316 && ngx_memcmp(ctx->cache->data.value.data,
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317 ctx->redirect.data, ctx->redirect.len) == 0)
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318 {
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319 ctx->cache->accessed = ngx_cached_time;
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320 ctx->cache->updated = ngx_cached_time;
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321 ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log);
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322
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323 return ngx_http_internal_redirect(r, &ctx->redirect, NULL);
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324 }
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325 }
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326
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327 ctx->redirect.len++;
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328 ctx->cache = ngx_http_cache_alloc(ilcf->index_cache, ctx->cache,
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329 NULL, &r->uri, crc,
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330 &ctx->redirect, log);
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331 ctx->redirect.len--;
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332
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333 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
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334 "http index cache alloc: " PTR_FMT, ctx->cache);
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335
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336 if (ctx->cache) {
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337 ctx->cache->fd = NGX_INVALID_FILE;
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338 ctx->cache->accessed = ngx_cached_time;
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339 ctx->cache->last_modified = 0;
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340 ctx->cache->updated = ngx_cached_time;
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341 ctx->cache->memory = 1;
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342 ngx_http_cache_unlock(ilcf->index_cache, ctx->cache, log);
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343 }
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344 }
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345
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346 #endif
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347
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348 return ngx_http_internal_redirect(r, &ctx->redirect, NULL);
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349 }
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350
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351 return NGX_DECLINED;
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352 }
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353
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354
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355 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r,
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356 ngx_http_index_ctx_t *ctx)
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357 {
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358 ngx_err_t err;
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359
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360 ctx->path.data[ctx->path.len - 1] = '\0';
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361 ctx->path.data[ctx->path.len] = '\0';
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362
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363 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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364 "http check dir: \"%s\"", ctx->path.data);
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365
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366 if (ngx_file_info(ctx->path.data, &r->file.info) == -1) {
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367
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368 err = ngx_errno;
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369
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370 if (err == NGX_ENOENT) {
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371 ctx->path.data[ctx->path.len - 1] = '/';
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372 return ngx_http_index_error(r, ctx, err);
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373 }
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374
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375 ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
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376 ngx_file_info_n " %s failed", ctx->path.data);
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377
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378 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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379 }
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380
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381 ctx->path.data[ctx->path.len - 1] = '/';
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382
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383 if (ngx_is_dir(&r->file.info)) {
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384 return NGX_OK;
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385 }
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386
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387 /* THINK: not reached ??? */
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388 return ngx_http_index_error(r, ctx, 0);
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389 }
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390
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391
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392 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r,
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393 ngx_http_index_ctx_t *ctx, ngx_err_t err)
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394 {
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395 if (err == NGX_EACCES) {
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396 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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397 "\"%s\" is forbidden", ctx->path.data);
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398
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399 return NGX_HTTP_FORBIDDEN;
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400 }
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401
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402 ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
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403 "\"%s\" is not found", ctx->path.data);
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404 return NGX_HTTP_NOT_FOUND;
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405 }
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406
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407
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408 static ngx_int_t ngx_http_index_init(ngx_cycle_t *cycle)
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409 {
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410 ngx_http_handler_pt *h;
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411 ngx_http_core_main_conf_t *cmcf;
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412
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413 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
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414
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415 h = ngx_push_array(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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416 if (h == NULL) {
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417 return NGX_ERROR;
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418 }
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419
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420 *h = ngx_http_index_handler;
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421
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422 return NGX_OK;
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423 }
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424
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425
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426 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf)
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427 {
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428 ngx_http_index_loc_conf_t *conf;
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429
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430 ngx_test_null(conf, ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t)),
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431 NGX_CONF_ERROR);
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432
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433 ngx_init_array(conf->indices, cf->pool, 3, sizeof(ngx_str_t),
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434 NGX_CONF_ERROR);
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435 conf->max_index_len = 0;
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436
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437 conf->index_cache = NULL;
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438
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439 return conf;
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440 }
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441
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442
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443 /* TODO: remove duplicate indices */
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444
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445 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf,
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446 void *parent, void *child)
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447 {
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448 ngx_http_index_loc_conf_t *prev = parent;
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449 ngx_http_index_loc_conf_t *conf = child;
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450
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451 ngx_uint_t i;
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452 ngx_str_t *index, *prev_index;
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453
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454 if (conf->max_index_len == 0) {
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455 if (prev->max_index_len != 0) {
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|
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456 ngx_memcpy(conf, prev, sizeof(ngx_http_index_loc_conf_t));
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457 return NGX_CONF_OK;
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|
|
458 }
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|
|
459
|
|
|
460 ngx_test_null(index, ngx_push_array(&conf->indices), NGX_CONF_ERROR);
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|
|
461 index->len = sizeof(NGX_HTTP_DEFAULT_INDEX) - 1;
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|
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462 index->data = (u_char *) NGX_HTTP_DEFAULT_INDEX;
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|
|
463 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX);
|
|
|
464
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|
|
465 return NGX_CONF_OK;
|
|
|
466 }
|
|
|
467
|
|
|
468 if (prev->max_index_len != 0) {
|
|
|
469
|
|
|
470 prev_index = prev->indices.elts;
|
|
|
471 for (i = 0; i < prev->indices.nelts; i++) {
|
|
|
472 ngx_test_null(index, ngx_push_array(&conf->indices),
|
|
|
473 NGX_CONF_ERROR);
|
|
|
474 index->len = prev_index[i].len;
|
|
|
475 index->data = prev_index[i].data;
|
|
|
476 }
|
|
|
477 }
|
|
|
478
|
|
|
479 if (conf->max_index_len < prev->max_index_len) {
|
|
|
480 conf->max_index_len = prev->max_index_len;
|
|
|
481 }
|
|
|
482
|
|
|
483 if (conf->index_cache == NULL) {
|
|
|
484 conf->index_cache = prev->index_cache;
|
|
|
485 }
|
|
|
486
|
|
|
487 return NGX_CONF_OK;
|
|
|
488 }
|
|
|
489
|
|
|
490
|
|
|
491 /* TODO: warn about duplicate indices */
|
|
|
492
|
|
|
493 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
494 void *conf)
|
|
|
495 {
|
|
|
496 ngx_http_index_loc_conf_t *ilcf = conf;
|
|
|
497
|
|
|
498 ngx_uint_t i;
|
|
|
499 ngx_str_t *index, *value;
|
|
|
500
|
|
|
501 value = cf->args->elts;
|
|
|
502
|
|
|
503 if (value[1].data[0] == '/' && ilcf->indices.nelts == 0) {
|
|
|
504 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
505 "first index \"%s\" in \"%s\" directive "
|
|
|
506 "must not be absolute",
|
|
|
507 value[1].data, cmd->name.data);
|
|
|
508 return NGX_CONF_ERROR;
|
|
|
509 }
|
|
|
510
|
|
|
511 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
512 if (value[i].len == 0) {
|
|
|
513 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
514 "index \"%s\" in \"%s\" directive is invalid",
|
|
|
515 value[1].data, cmd->name.data);
|
|
|
516 return NGX_CONF_ERROR;
|
|
|
517 }
|
|
|
518
|
|
|
519 ngx_test_null(index, ngx_push_array(&ilcf->indices), NGX_CONF_ERROR);
|
|
|
520 index->len = value[i].len;
|
|
|
521 index->data = value[i].data;
|
|
|
522
|
|
|
523 if (ilcf->max_index_len < index->len + 1) {
|
|
|
524 ilcf->max_index_len = index->len + 1;
|
|
|
525 }
|
|
|
526 }
|
|
|
527
|
|
|
528 return NGX_CONF_OK;
|
|
|
529 }
|
