Mercurial > hg > nginx
annotate src/http/modules/ngx_http_index_module.c @ 2756:09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
*) of.failed to return exact name of failed syscall
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Mon, 27 Apr 2009 09:55:53 +0000 |
| parents | 8e720b7fe6d2 |
| children | c7d57b539248 |
| rev | line source |
|---|---|
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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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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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12 typedef struct { |
| 509 | 13 ngx_str_t name; |
| 14 ngx_array_t *lengths; | |
| 15 ngx_array_t *values; | |
| 16 } ngx_http_index_t; | |
| 17 | |
| 18 | |
| 19 typedef struct { | |
| 20 ngx_array_t *indices; /* array of ngx_http_index_t */ | |
| 469 | 21 size_t max_index_len; |
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22 } ngx_http_index_loc_conf_t; |
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23 |
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24 |
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25 #define NGX_HTTP_DEFAULT_INDEX "index.html" |
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26 |
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27 |
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28 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r, |
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29 ngx_http_core_loc_conf_t *clcf, u_char *path, u_char *last); |
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30 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r, |
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31 ngx_http_core_loc_conf_t *clcf, u_char *file, ngx_err_t err); |
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32 |
| 681 | 33 static ngx_int_t ngx_http_index_init(ngx_conf_t *cf); |
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34 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf); |
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35 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf, |
| 509 | 36 void *parent, void *child); |
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37 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, |
| 509 | 38 void *conf); |
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39 |
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40 |
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41 static ngx_command_t ngx_http_index_commands[] = { |
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42 |
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43 { ngx_string("index"), |
| 509 | 44 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
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45 ngx_http_index_set_index, |
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46 NGX_HTTP_LOC_CONF_OFFSET, |
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47 0, |
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48 NULL }, |
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49 |
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50 ngx_null_command |
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51 }; |
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52 |
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53 |
| 667 | 54 static ngx_http_module_t ngx_http_index_module_ctx = { |
| 509 | 55 NULL, /* preconfiguration */ |
| 681 | 56 ngx_http_index_init, /* postconfiguration */ |
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57 |
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91
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58 NULL, /* create main configuration */ |
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59 NULL, /* init main configuration */ |
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69
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60 |
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61 NULL, /* create server configuration */ |
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62 NULL, /* merge server configuration */ |
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63 |
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64 ngx_http_index_create_loc_conf, /* create location configration */ |
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65 ngx_http_index_merge_loc_conf /* merge location configration */ |
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66 }; |
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67 |
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68 |
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69 ngx_module_t ngx_http_index_module = { |
| 509 | 70 NGX_MODULE_V1, |
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71 &ngx_http_index_module_ctx, /* module context */ |
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72 ngx_http_index_commands, /* module directives */ |
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73 NGX_HTTP_MODULE, /* module type */ |
| 541 | 74 NULL, /* init master */ |
| 681 | 75 NULL, /* init module */ |
| 541 | 76 NULL, /* init process */ |
| 77 NULL, /* init thread */ | |
| 78 NULL, /* exit thread */ | |
| 79 NULL, /* exit process */ | |
| 80 NULL, /* exit master */ | |
| 81 NGX_MODULE_V1_PADDING | |
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82 }; |
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83 |
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84 |
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85 /* |
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86 * Try to open/test the first index file before the test of directory |
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87 * existence because valid requests should be much more than invalid ones. |
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88 * If the file open()/stat() would fail, then the directory stat() should |
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89 * be more quickly because some data is already cached in the kernel. |
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90 * Besides, Win32 may return ERROR_PATH_NOT_FOUND (NGX_ENOTDIR) at once. |
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91 * Unix has ENOTDIR error, however, it's less helpful than Win32's one: |
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92 * it only indicates that path contains an usual file in place of directory. |
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93 */ |
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94 |
| 509 | 95 static ngx_int_t |
| 96 ngx_http_index_handler(ngx_http_request_t *r) | |
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97 { |
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98 u_char *p, *name; |
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99 size_t len, root, reserve, allocated; |
| 509 | 100 ngx_int_t rc; |
| 1454 | 101 ngx_str_t path, uri; |
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102 ngx_uint_t i, dir_tested; |
| 509 | 103 ngx_http_index_t *index; |
| 1454 | 104 ngx_open_file_info_t of; |
| 509 | 105 ngx_http_script_code_pt code; |
| 106 ngx_http_script_engine_t e; | |
| 107 ngx_http_core_loc_conf_t *clcf; | |
| 108 ngx_http_index_loc_conf_t *ilcf; | |
| 109 ngx_http_script_len_code_pt lcode; | |
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110 |
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111 if (r->uri.data[r->uri.len - 1] != '/') { |
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112 return NGX_DECLINED; |
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113 } |
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114 |
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115 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) { |
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116 return NGX_DECLINED; |
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117 } |
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118 |
| 489 | 119 if (r->zero_in_uri) { |
| 120 return NGX_DECLINED; | |
| 121 } | |
| 122 | |
| 1454 | 123 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module); |
| 124 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
| 125 | |
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126 allocated = 0; |
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127 root = 0; |
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128 dir_tested = 0; |
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129 name = NULL; |
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130 /* suppress MSVC warning */ |
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131 path.data = NULL; |
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132 |
| 509 | 133 index = ilcf->indices->elts; |
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134 for (i = 0; i < ilcf->indices->nelts; i++) { |
| 509 | 135 |
| 136 if (index[i].lengths == NULL) { | |
|
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137 |
| 509 | 138 if (index[i].name.data[0] == '/') { |
| 139 return ngx_http_internal_redirect(r, &index[i].name, &r->args); | |
| 140 } | |
|
201
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141 |
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142 reserve = ilcf->max_index_len; |
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143 len = index[i].name.len; |
|
144
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144 |
| 509 | 145 } else { |
| 146 ngx_memzero(&e, sizeof(ngx_http_script_engine_t)); | |
|
201
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147 |
| 509 | 148 e.ip = index[i].lengths->elts; |
| 149 e.request = r; | |
| 573 | 150 e.flushed = 1; |
| 509 | 151 |
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152 /* 1 is for terminating '\0' as in static names */ |
| 563 | 153 len = 1; |
|
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154 |
| 509 | 155 while (*(uintptr_t *) e.ip) { |
| 156 lcode = *(ngx_http_script_len_code_pt *) e.ip; | |
| 157 len += lcode(&e); | |
| 158 } | |
|
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159 |
| 563 | 160 /* 16 bytes are preallocation */ |
| 161 | |
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162 reserve = len + 16; |
| 509 | 163 } |
|
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164 |
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165 if (reserve > allocated) { |
| 557 | 166 |
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167 name = ngx_http_map_uri_to_path(r, &path, &root, reserve); |
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168 if (name == NULL) { |
| 557 | 169 return NGX_ERROR; |
|
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170 } |
| 557 | 171 |
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172 allocated = path.data + path.len - name; |
|
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173 } |
|
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174 |
| 509 | 175 if (index[i].values == NULL) { |
| 557 | 176 |
| 177 /* index[i].name.len includes the terminating '\0' */ | |
| 178 | |
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179 ngx_memcpy(name, index[i].name.data, index[i].name.len); |
|
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180 |
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181 path.len = (name + index[i].name.len - 1) - path.data; |
| 1454 | 182 |
| 509 | 183 } else { |
| 184 e.ip = index[i].values->elts; | |
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185 e.pos = name; |
|
293
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186 |
| 509 | 187 while (*(uintptr_t *) e.ip) { |
| 188 code = *(ngx_http_script_code_pt *) e.ip; | |
| 189 code((ngx_http_script_engine_t *) &e); | |
|
396
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190 } |
|
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191 |
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192 if (*name == '/') { |
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193 uri.len = len - 1; |
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194 uri.data = name; |
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195 return ngx_http_internal_redirect(r, &uri, &r->args); |
|
396
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196 } |
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197 |
| 1454 | 198 path.len = e.pos - path.data; |
| 199 | |
| 2564 | 200 *e.pos = '\0'; |
|
293
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201 } |
|
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202 |
| 2405 | 203 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| 204 "open index \"%V\"", &path); | |
|
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205 |
|
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206 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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207 |
| 2129 | 208 of.directio = clcf->directio; |
|
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209 of.valid = clcf->open_file_cache_valid; |
| 1772 | 210 of.min_uses = clcf->open_file_cache_min_uses; |
|
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211 of.test_only = 1; |
| 1454 | 212 of.errors = clcf->open_file_cache_errors; |
| 1457 | 213 of.events = clcf->open_file_cache_events; |
| 563 | 214 |
| 1799 | 215 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool) |
| 216 != NGX_OK) | |
| 217 { | |
|
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218 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, of.err, |
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219 "%s \"%s\" failed", of.failed, path.data); |
|
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220 |
| 1454 | 221 if (of.err == 0) { |
| 222 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 223 } | |
|
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224 |
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225 if (of.err == NGX_ENOTDIR || of.err == NGX_EACCES) { |
|
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226 return ngx_http_index_error(r, clcf, path.data, of.err); |
|
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227 } |
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228 |
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229 if (!dir_tested) { |
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230 rc = ngx_http_index_test_dir(r, clcf, path.data, name - 1); |
|
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231 |
|
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232 if (rc != NGX_OK) { |
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233 return rc; |
|
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234 } |
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235 |
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236 dir_tested = 1; |
|
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237 } |
|
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238 |
| 1454 | 239 if (of.err == NGX_ENOENT) { |
|
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240 continue; |
|
41
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241 } |
|
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242 |
|
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243 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err, |
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244 "%s \"%s\" failed", of.failed, path.data); |
|
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245 |
|
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246 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
|
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247 } |
|
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248 |
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249 uri.len = r->uri.len + len - 1; |
| 557 | 250 |
| 251 if (!clcf->alias) { | |
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252 uri.data = path.data + root; |
| 557 | 253 |
| 254 } else { | |
| 2049 | 255 uri.data = ngx_pnalloc(r->pool, uri.len); |
| 557 | 256 if (uri.data == NULL) { |
| 257 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 258 } | |
| 259 | |
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260 p = ngx_copy(uri.data, r->uri.data, r->uri.len); |
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261 ngx_memcpy(p, name, len - 1); |
|
199
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262 } |
|
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263 |
| 557 | 264 return ngx_http_internal_redirect(r, &uri, &r->args); |
|
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265 } |
|
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266 |
|
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267 return NGX_DECLINED; |
|
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268 } |
|
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269 |
|
24
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|
270 |
| 509 | 271 static ngx_int_t |
| 1454 | 272 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, |
|
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273 u_char *path, u_char *last) |
| 509 | 274 { |
| 1454 | 275 u_char c; |
|
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276 ngx_str_t dir; |
| 1454 | 277 ngx_open_file_info_t of; |
| 509 | 278 |
|
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279 c = *last; |
| 1627 | 280 if (c != '/' || path == last) { |
|
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281 /* "alias" without trailing slash */ |
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282 c = *(++last); |
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283 } |
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284 *last = '\0'; |
|
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285 |
|
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286 dir.len = last - path; |
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287 dir.data = path; |
|
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288 |
| 1454 | 289 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
|
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290 "http index check dir: \"%V\"", &dir); |
|
47
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|
291 |
|
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292 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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293 |
| 1454 | 294 of.test_dir = 1; |
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295 of.test_only = 1; |
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296 of.valid = clcf->open_file_cache_valid; |
| 1454 | 297 of.errors = clcf->open_file_cache_errors; |
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298 |
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299 if (ngx_open_cached_file(clcf->open_file_cache, &dir, &of, r->pool) |
| 1454 | 300 != NGX_OK) |
| 301 { | |
| 302 if (of.err) { | |
| 303 | |
| 304 if (of.err == NGX_ENOENT) { | |
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305 *last = c; |
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306 return ngx_http_index_error(r, clcf, dir.data, NGX_ENOENT); |
| 1454 | 307 } |
| 308 | |
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309 if (of.err == NGX_EACCES) { |
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310 |
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311 *last = c; |
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312 |
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313 /* |
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314 * ngx_http_index_test_dir() is called after the first index |
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315 * file testing has returned an error distinct from NGX_EACCES. |
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316 * This means that directory searching is allowed. |
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317 */ |
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318 |
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319 return NGX_OK; |
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320 } |
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321 |
| 1454 | 322 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err, |
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323 "%s \"%s\" failed", of.failed, dir.data); |
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324 } |
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325 |
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326 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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327 } |
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328 |
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329 *last = c; |
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330 |
| 1454 | 331 if (of.is_dir) { |
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332 return NGX_OK; |
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333 } |
|
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334 |
| 509 | 335 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
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336 "\"%s\" is not a directory", dir.data); |
| 509 | 337 |
| 338 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
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339 } |
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340 |
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341 |
| 509 | 342 static ngx_int_t |
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343 ngx_http_index_error(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, |
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344 u_char *file, ngx_err_t err) |
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345 { |
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346 if (err == NGX_EACCES) { |
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347 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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348 "\"%s\" is forbidden", file); |
| 577 | 349 |
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350 return NGX_HTTP_FORBIDDEN; |
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351 } |
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352 |
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353 if (clcf->log_not_found) { |
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354 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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355 "\"%s\" is not found", file); |
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356 } |
| 509 | 357 |
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358 return NGX_HTTP_NOT_FOUND; |
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359 } |
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360 |
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361 |
| 509 | 362 static void * |
| 363 ngx_http_index_create_loc_conf(ngx_conf_t *cf) | |
| 364 { | |
| 365 ngx_http_index_loc_conf_t *conf; | |
| 366 | |
| 367 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t)); | |
| 368 if (conf == NULL) { | |
| 369 return NGX_CONF_ERROR; | |
| 370 } | |
| 371 | |
| 372 conf->indices = NULL; | |
| 681 | 373 conf->max_index_len = 0; |
| 509 | 374 |
| 375 return conf; | |
| 376 } | |
| 377 | |
| 378 | |
| 379 static char * | |
| 380 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 381 { | |
| 382 ngx_http_index_loc_conf_t *prev = parent; | |
| 383 ngx_http_index_loc_conf_t *conf = child; | |
| 384 | |
| 385 ngx_http_index_t *index; | |
| 386 | |
| 387 if (conf->indices == NULL) { | |
| 388 conf->indices = prev->indices; | |
| 389 conf->max_index_len = prev->max_index_len; | |
| 390 } | |
| 391 | |
| 392 if (conf->indices == NULL) { | |
| 393 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t)); | |
| 394 if (conf->indices == NULL) { | |
| 395 return NGX_CONF_ERROR; | |
| 396 } | |
| 397 | |
| 398 index = ngx_array_push(conf->indices); | |
| 399 if (index == NULL) { | |
| 400 return NGX_CONF_ERROR; | |
| 401 } | |
| 402 | |
| 403 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
| 404 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX; | |
| 405 index->lengths = NULL; | |
| 406 index->values = NULL; | |
| 407 | |
| 408 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
| 409 | |
| 410 return NGX_CONF_OK; | |
| 411 } | |
| 412 | |
| 413 return NGX_CONF_OK; | |
| 414 } | |
| 415 | |
| 416 | |
| 681 | 417 static ngx_int_t |
| 418 ngx_http_index_init(ngx_conf_t *cf) | |
| 419 { | |
| 420 ngx_http_handler_pt *h; | |
| 421 ngx_http_core_main_conf_t *cmcf; | |
| 422 | |
| 423 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
| 424 | |
| 425 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); | |
| 426 if (h == NULL) { | |
| 427 return NGX_ERROR; | |
| 428 } | |
| 429 | |
| 430 *h = ngx_http_index_handler; | |
| 431 | |
| 432 return NGX_OK; | |
| 433 } | |
| 434 | |
| 435 | |
| 509 | 436 /* TODO: warn about duplicate indices */ |
| 437 | |
| 438 static char * | |
| 439 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 440 { | |
| 441 ngx_http_index_loc_conf_t *ilcf = conf; | |
| 442 | |
| 681 | 443 ngx_str_t *value; |
| 509 | 444 ngx_uint_t i, n; |
| 445 ngx_http_index_t *index; | |
| 446 ngx_http_script_compile_t sc; | |
| 447 | |
| 448 if (ilcf->indices == NULL) { | |
| 449 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t)); | |
| 450 if (ilcf->indices == NULL) { | |
| 451 return NGX_CONF_ERROR; | |
| 452 } | |
| 453 } | |
| 454 | |
| 455 value = cf->args->elts; | |
| 456 | |
| 457 for (i = 1; i < cf->args->nelts; i++) { | |
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458 |
| 509 | 459 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) { |
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460 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
| 509 | 461 "only the last index in \"index\" directive " |
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462 "should be absolute"); |
| 509 | 463 } |
| 464 | |
| 465 if (value[i].len == 0) { | |
| 466 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 467 "index \"%V\" in \"index\" directive is invalid", | |
| 468 &value[1]); | |
| 469 return NGX_CONF_ERROR; | |
| 470 } | |
| 471 | |
| 472 index = ngx_array_push(ilcf->indices); | |
| 473 if (index == NULL) { | |
| 474 return NGX_CONF_ERROR; | |
| 475 } | |
| 476 | |
| 477 index->name.len = value[i].len; | |
| 478 index->name.data = value[i].data; | |
| 479 index->lengths = NULL; | |
| 480 index->values = NULL; | |
| 481 | |
| 482 n = ngx_http_script_variables_count(&value[i]); | |
| 483 | |
| 484 if (n == 0) { | |
| 681 | 485 if (ilcf->max_index_len < index->name.len) { |
| 509 | 486 ilcf->max_index_len = index->name.len; |
| 487 } | |
| 488 | |
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489 if (index->name.data[0] == '/') { |
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490 continue; |
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491 } |
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492 |
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493 /* include the terminating '\0' to the length to use ngx_memcpy() */ |
| 557 | 494 index->name.len++; |
| 495 | |
| 509 | 496 continue; |
| 497 } | |
| 498 | |
| 499 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
| 500 | |
| 501 sc.cf = cf; | |
| 502 sc.source = &value[i]; | |
| 503 sc.lengths = &index->lengths; | |
| 504 sc.values = &index->values; | |
| 505 sc.variables = n; | |
| 506 sc.complete_lengths = 1; | |
| 507 sc.complete_values = 1; | |
| 508 | |
| 509 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
| 510 return NGX_CONF_ERROR; | |
| 511 } | |
| 512 } | |
| 513 | |
| 514 return NGX_CONF_OK; | |
| 515 } |