Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_index_module.c @ 4478:08713bac87fc
Support for disable_symlinks in various modules.
author | Andrey Belov <defan@nginx.com> |
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date | Mon, 13 Feb 2012 16:32:21 +0000 |
parents | d620f497c50f |
children | 13e09cf11d4e |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_http.h> |
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11 |
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13 typedef struct { |
509 | 14 ngx_str_t name; |
15 ngx_array_t *lengths; | |
16 ngx_array_t *values; | |
17 } ngx_http_index_t; | |
18 | |
19 | |
20 typedef struct { | |
21 ngx_array_t *indices; /* array of ngx_http_index_t */ | |
469 | 22 size_t max_index_len; |
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23 } ngx_http_index_loc_conf_t; |
99
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24 |
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25 |
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26 #define NGX_HTTP_DEFAULT_INDEX "index.html" |
0
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28 |
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29 static ngx_int_t ngx_http_index_test_dir(ngx_http_request_t *r, |
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30 ngx_http_core_loc_conf_t *clcf, u_char *path, u_char *last); |
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31 static ngx_int_t ngx_http_index_error(ngx_http_request_t *r, |
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32 ngx_http_core_loc_conf_t *clcf, u_char *file, ngx_err_t err); |
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33 |
681 | 34 static ngx_int_t ngx_http_index_init(ngx_conf_t *cf); |
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35 static void *ngx_http_index_create_loc_conf(ngx_conf_t *cf); |
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36 static char *ngx_http_index_merge_loc_conf(ngx_conf_t *cf, |
509 | 37 void *parent, void *child); |
41
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38 static char *ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, |
509 | 39 void *conf); |
10
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40 |
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41 |
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42 static ngx_command_t ngx_http_index_commands[] = { |
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43 |
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44 { ngx_string("index"), |
509 | 45 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, |
199
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46 ngx_http_index_set_index, |
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47 NGX_HTTP_LOC_CONF_OFFSET, |
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48 0, |
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49 NULL }, |
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51 ngx_null_command |
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52 }; |
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53 |
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54 |
667 | 55 static ngx_http_module_t ngx_http_index_module_ctx = { |
509 | 56 NULL, /* preconfiguration */ |
681 | 57 ngx_http_index_init, /* postconfiguration */ |
177
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58 |
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59 NULL, /* create main configuration */ |
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60 NULL, /* init main configuration */ |
69
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61 |
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62 NULL, /* create server configuration */ |
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63 NULL, /* merge server configuration */ |
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64 |
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65 ngx_http_index_create_loc_conf, /* create location configration */ |
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66 ngx_http_index_merge_loc_conf /* merge location configration */ |
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67 }; |
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68 |
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69 |
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70 ngx_module_t ngx_http_index_module = { |
509 | 71 NGX_MODULE_V1, |
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72 &ngx_http_index_module_ctx, /* module context */ |
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73 ngx_http_index_commands, /* module directives */ |
96
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74 NGX_HTTP_MODULE, /* module type */ |
541 | 75 NULL, /* init master */ |
681 | 76 NULL, /* init module */ |
541 | 77 NULL, /* init process */ |
78 NULL, /* init thread */ | |
79 NULL, /* exit thread */ | |
80 NULL, /* exit process */ | |
81 NULL, /* exit master */ | |
82 NGX_MODULE_V1_PADDING | |
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83 }; |
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84 |
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85 |
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86 /* |
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87 * Try to open/test the first index file before the test of directory |
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88 * existence because valid requests should be much more than invalid ones. |
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89 * If the file open()/stat() would fail, then the directory stat() should |
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90 * be more quickly because some data is already cached in the kernel. |
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91 * Besides, Win32 may return ERROR_PATH_NOT_FOUND (NGX_ENOTDIR) at once. |
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92 * Unix has ENOTDIR error, however, it's less helpful than Win32's one: |
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93 * it only indicates that path contains an usual file in place of directory. |
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94 */ |
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95 |
509 | 96 static ngx_int_t |
97 ngx_http_index_handler(ngx_http_request_t *r) | |
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98 { |
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99 u_char *p, *name; |
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100 size_t len, root, reserve, allocated; |
509 | 101 ngx_int_t rc; |
1454 | 102 ngx_str_t path, uri; |
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103 ngx_uint_t i, dir_tested; |
509 | 104 ngx_http_index_t *index; |
1454 | 105 ngx_open_file_info_t of; |
509 | 106 ngx_http_script_code_pt code; |
107 ngx_http_script_engine_t e; | |
108 ngx_http_core_loc_conf_t *clcf; | |
109 ngx_http_index_loc_conf_t *ilcf; | |
110 ngx_http_script_len_code_pt lcode; | |
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111 |
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112 if (r->uri.data[r->uri.len - 1] != '/') { |
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113 return NGX_DECLINED; |
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114 } |
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115 |
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116 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) { |
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117 return NGX_DECLINED; |
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118 } |
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119 |
1454 | 120 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module); |
121 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
122 | |
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123 allocated = 0; |
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124 root = 0; |
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125 dir_tested = 0; |
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126 name = NULL; |
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127 /* suppress MSVC warning */ |
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128 path.data = NULL; |
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129 |
509 | 130 index = ilcf->indices->elts; |
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131 for (i = 0; i < ilcf->indices->nelts; i++) { |
509 | 132 |
133 if (index[i].lengths == NULL) { | |
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134 |
509 | 135 if (index[i].name.data[0] == '/') { |
136 return ngx_http_internal_redirect(r, &index[i].name, &r->args); | |
137 } | |
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138 |
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139 reserve = ilcf->max_index_len; |
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140 len = index[i].name.len; |
144
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141 |
509 | 142 } else { |
143 ngx_memzero(&e, sizeof(ngx_http_script_engine_t)); | |
201
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144 |
509 | 145 e.ip = index[i].lengths->elts; |
146 e.request = r; | |
573 | 147 e.flushed = 1; |
509 | 148 |
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149 /* 1 is for terminating '\0' as in static names */ |
563 | 150 len = 1; |
201
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151 |
509 | 152 while (*(uintptr_t *) e.ip) { |
153 lcode = *(ngx_http_script_len_code_pt *) e.ip; | |
154 len += lcode(&e); | |
155 } | |
44
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156 |
563 | 157 /* 16 bytes are preallocation */ |
158 | |
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159 reserve = len + 16; |
509 | 160 } |
201
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161 |
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162 if (reserve > allocated) { |
557 | 163 |
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164 name = ngx_http_map_uri_to_path(r, &path, &root, reserve); |
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165 if (name == NULL) { |
557 | 166 return NGX_ERROR; |
201
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167 } |
557 | 168 |
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169 allocated = path.data + path.len - name; |
287
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170 } |
201
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171 |
509 | 172 if (index[i].values == NULL) { |
557 | 173 |
174 /* index[i].name.len includes the terminating '\0' */ | |
175 | |
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176 ngx_memcpy(name, index[i].name.data, index[i].name.len); |
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177 |
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178 path.len = (name + index[i].name.len - 1) - path.data; |
1454 | 179 |
509 | 180 } else { |
181 e.ip = index[i].values->elts; | |
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182 e.pos = name; |
293
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183 |
509 | 184 while (*(uintptr_t *) e.ip) { |
185 code = *(ngx_http_script_code_pt *) e.ip; | |
186 code((ngx_http_script_engine_t *) &e); | |
396
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187 } |
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188 |
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189 if (*name == '/') { |
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190 uri.len = len - 1; |
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191 uri.data = name; |
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192 return ngx_http_internal_redirect(r, &uri, &r->args); |
396
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193 } |
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194 |
1454 | 195 path.len = e.pos - path.data; |
196 | |
2564 | 197 *e.pos = '\0'; |
293
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198 } |
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199 |
2405 | 200 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
201 "open index \"%V\"", &path); | |
0
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202 |
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203 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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204 |
3178 | 205 of.read_ahead = clcf->read_ahead; |
2129 | 206 of.directio = clcf->directio; |
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207 of.valid = clcf->open_file_cache_valid; |
1772 | 208 of.min_uses = clcf->open_file_cache_min_uses; |
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209 of.test_only = 1; |
1454 | 210 of.errors = clcf->open_file_cache_errors; |
1457 | 211 of.events = clcf->open_file_cache_events; |
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212 #if (NGX_HAVE_OPENAT) |
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213 of.disable_symlinks = clcf->disable_symlinks; |
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214 #endif |
563 | 215 |
1799 | 216 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool) |
217 != NGX_OK) | |
218 { | |
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219 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, of.err, |
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220 "%s \"%s\" failed", of.failed, path.data); |
46
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221 |
1454 | 222 if (of.err == 0) { |
223 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
224 } | |
47
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225 |
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226 #if (NGX_HAVE_OPENAT) |
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227 if (of.err == NGX_EMLINK |
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228 || of.err == NGX_ELOOP) |
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229 { |
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230 return NGX_HTTP_FORBIDDEN; |
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231 } |
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232 #endif |
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233 |
3160
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234 if (of.err == NGX_ENOTDIR |
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235 || of.err == NGX_ENAMETOOLONG |
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236 || of.err == NGX_EACCES) |
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237 { |
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238 return ngx_http_index_error(r, clcf, path.data, of.err); |
46
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239 } |
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240 |
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241 if (!dir_tested) { |
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242 rc = ngx_http_index_test_dir(r, clcf, path.data, name - 1); |
46
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243 |
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244 if (rc != NGX_OK) { |
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245 return rc; |
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246 } |
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247 |
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248 dir_tested = 1; |
46
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249 } |
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250 |
1454 | 251 if (of.err == NGX_ENOENT) { |
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252 continue; |
41
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253 } |
0
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254 |
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255 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err, |
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256 "%s \"%s\" failed", of.failed, path.data); |
10
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257 |
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258 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
0
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259 } |
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260 |
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261 uri.len = r->uri.len + len - 1; |
557 | 262 |
263 if (!clcf->alias) { | |
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264 uri.data = path.data + root; |
557 | 265 |
266 } else { | |
2049 | 267 uri.data = ngx_pnalloc(r->pool, uri.len); |
557 | 268 if (uri.data == NULL) { |
269 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
270 } | |
271 | |
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272 p = ngx_copy(uri.data, r->uri.data, r->uri.len); |
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273 ngx_memcpy(p, name, len - 1); |
199
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274 } |
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275 |
557 | 276 return ngx_http_internal_redirect(r, &uri, &r->args); |
0
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277 } |
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278 |
10
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279 return NGX_DECLINED; |
0
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280 } |
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281 |
24
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282 |
509 | 283 static ngx_int_t |
1454 | 284 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, |
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285 u_char *path, u_char *last) |
509 | 286 { |
1454 | 287 u_char c; |
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288 ngx_str_t dir; |
1454 | 289 ngx_open_file_info_t of; |
509 | 290 |
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291 c = *last; |
1627 | 292 if (c != '/' || path == last) { |
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293 /* "alias" without trailing slash */ |
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294 c = *(++last); |
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295 } |
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296 *last = '\0'; |
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297 |
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298 dir.len = last - path; |
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299 dir.data = path; |
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300 |
1454 | 301 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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302 "http index check dir: \"%V\"", &dir); |
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303 |
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304 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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305 |
1454 | 306 of.test_dir = 1; |
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307 of.test_only = 1; |
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308 of.valid = clcf->open_file_cache_valid; |
1454 | 309 of.errors = clcf->open_file_cache_errors; |
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310 #if (NGX_HAVE_OPENAT) |
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311 of.disable_symlinks = clcf->disable_symlinks; |
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312 #endif |
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313 |
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314 if (ngx_open_cached_file(clcf->open_file_cache, &dir, &of, r->pool) |
1454 | 315 != NGX_OK) |
316 { | |
317 if (of.err) { | |
318 | |
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319 #if (NGX_HAVE_OPENAT) |
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320 if (of.err == NGX_EMLINK |
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321 || of.err == NGX_ELOOP) |
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322 { |
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323 return NGX_HTTP_FORBIDDEN; |
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324 } |
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325 #endif |
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326 |
1454 | 327 if (of.err == NGX_ENOENT) { |
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328 *last = c; |
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329 return ngx_http_index_error(r, clcf, dir.data, NGX_ENOENT); |
1454 | 330 } |
331 | |
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332 if (of.err == NGX_EACCES) { |
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333 |
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334 *last = c; |
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335 |
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336 /* |
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337 * ngx_http_index_test_dir() is called after the first index |
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338 * file testing has returned an error distinct from NGX_EACCES. |
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339 * This means that directory searching is allowed. |
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340 */ |
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341 |
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342 return NGX_OK; |
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343 } |
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344 |
1454 | 345 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err, |
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346 "%s \"%s\" failed", of.failed, dir.data); |
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347 } |
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348 |
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349 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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350 } |
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351 |
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352 *last = c; |
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353 |
1454 | 354 if (of.is_dir) { |
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355 return NGX_OK; |
144
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356 } |
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357 |
509 | 358 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
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359 "\"%s\" is not a directory", dir.data); |
509 | 360 |
361 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
144
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362 } |
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363 |
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364 |
509 | 365 static ngx_int_t |
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366 ngx_http_index_error(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, |
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367 u_char *file, ngx_err_t err) |
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368 { |
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369 if (err == NGX_EACCES) { |
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370 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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371 "\"%s\" is forbidden", file); |
577 | 372 |
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373 return NGX_HTTP_FORBIDDEN; |
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374 } |
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375 |
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376 if (clcf->log_not_found) { |
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377 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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378 "\"%s\" is not found", file); |
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379 } |
509 | 380 |
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381 return NGX_HTTP_NOT_FOUND; |
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382 } |
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383 |
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384 |
509 | 385 static void * |
386 ngx_http_index_create_loc_conf(ngx_conf_t *cf) | |
387 { | |
388 ngx_http_index_loc_conf_t *conf; | |
389 | |
390 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t)); | |
391 if (conf == NULL) { | |
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392 return NULL; |
509 | 393 } |
394 | |
395 conf->indices = NULL; | |
681 | 396 conf->max_index_len = 0; |
509 | 397 |
398 return conf; | |
399 } | |
400 | |
401 | |
402 static char * | |
403 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
404 { | |
405 ngx_http_index_loc_conf_t *prev = parent; | |
406 ngx_http_index_loc_conf_t *conf = child; | |
407 | |
408 ngx_http_index_t *index; | |
409 | |
410 if (conf->indices == NULL) { | |
411 conf->indices = prev->indices; | |
412 conf->max_index_len = prev->max_index_len; | |
413 } | |
414 | |
415 if (conf->indices == NULL) { | |
416 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t)); | |
417 if (conf->indices == NULL) { | |
418 return NGX_CONF_ERROR; | |
419 } | |
420 | |
421 index = ngx_array_push(conf->indices); | |
422 if (index == NULL) { | |
423 return NGX_CONF_ERROR; | |
424 } | |
425 | |
426 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
427 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX; | |
428 index->lengths = NULL; | |
429 index->values = NULL; | |
430 | |
431 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
432 | |
433 return NGX_CONF_OK; | |
434 } | |
435 | |
436 return NGX_CONF_OK; | |
437 } | |
438 | |
439 | |
681 | 440 static ngx_int_t |
441 ngx_http_index_init(ngx_conf_t *cf) | |
442 { | |
443 ngx_http_handler_pt *h; | |
444 ngx_http_core_main_conf_t *cmcf; | |
445 | |
446 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
447 | |
448 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); | |
449 if (h == NULL) { | |
450 return NGX_ERROR; | |
451 } | |
452 | |
453 *h = ngx_http_index_handler; | |
454 | |
455 return NGX_OK; | |
456 } | |
457 | |
458 | |
509 | 459 /* TODO: warn about duplicate indices */ |
460 | |
461 static char * | |
462 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
463 { | |
464 ngx_http_index_loc_conf_t *ilcf = conf; | |
465 | |
681 | 466 ngx_str_t *value; |
509 | 467 ngx_uint_t i, n; |
468 ngx_http_index_t *index; | |
469 ngx_http_script_compile_t sc; | |
470 | |
471 if (ilcf->indices == NULL) { | |
472 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t)); | |
473 if (ilcf->indices == NULL) { | |
474 return NGX_CONF_ERROR; | |
475 } | |
476 } | |
477 | |
478 value = cf->args->elts; | |
479 | |
480 for (i = 1; i < cf->args->nelts; i++) { | |
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481 |
509 | 482 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) { |
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483 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
509 | 484 "only the last index in \"index\" directive " |
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485 "should be absolute"); |
509 | 486 } |
487 | |
488 if (value[i].len == 0) { | |
489 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
490 "index \"%V\" in \"index\" directive is invalid", | |
491 &value[1]); | |
492 return NGX_CONF_ERROR; | |
493 } | |
494 | |
495 index = ngx_array_push(ilcf->indices); | |
496 if (index == NULL) { | |
497 return NGX_CONF_ERROR; | |
498 } | |
499 | |
500 index->name.len = value[i].len; | |
501 index->name.data = value[i].data; | |
502 index->lengths = NULL; | |
503 index->values = NULL; | |
504 | |
505 n = ngx_http_script_variables_count(&value[i]); | |
506 | |
507 if (n == 0) { | |
681 | 508 if (ilcf->max_index_len < index->name.len) { |
509 | 509 ilcf->max_index_len = index->name.len; |
510 } | |
511 | |
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512 if (index->name.data[0] == '/') { |
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513 continue; |
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514 } |
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515 |
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516 /* include the terminating '\0' to the length to use ngx_memcpy() */ |
557 | 517 index->name.len++; |
518 | |
509 | 519 continue; |
520 } | |
521 | |
522 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
523 | |
524 sc.cf = cf; | |
525 sc.source = &value[i]; | |
526 sc.lengths = &index->lengths; | |
527 sc.values = &index->values; | |
528 sc.variables = n; | |
529 sc.complete_lengths = 1; | |
530 sc.complete_values = 1; | |
531 | |
532 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
533 return NGX_CONF_ERROR; | |
534 } | |
535 } | |
536 | |
537 return NGX_CONF_OK; | |
538 } |