Mercurial > hg > nginx
annotate src/http/modules/ngx_http_index_module.c @ 1789:a35032212cf2
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author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 27 Dec 2007 14:20:50 +0000 |
parents | 25c93614e6b9 |
children | 0b5b94805d26 |
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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25 #define NGX_HTTP_DEFAULT_INDEX "index.html" |
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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, u_char *file, |
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31 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); |
41
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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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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 */ |
177
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57 |
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58 NULL, /* create main configuration */ |
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59 NULL, /* init main configuration */ |
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 the first index file before the test of the directory existence |
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87 * because the valid requests should be many more than invalid ones. |
501 | 88 * If open() would fail, then stat() should be more quickly because some data |
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89 * is already cached in the kernel. |
501 | 90 * Besides, Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR). |
91 * Unix has ENOTDIR error, although it less helpfull - it points only | |
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92 * that path contains the usual file in place of the 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, nlen, root, allocated; |
509 | 100 ngx_int_t rc; |
1454 | 101 ngx_str_t path, uri; |
509 | 102 ngx_log_t *log; |
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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 |
489 | 120 /* TODO: Win32 */ |
121 if (r->zero_in_uri) { | |
122 return NGX_DECLINED; | |
123 } | |
124 | |
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125 log = r->connection->log; |
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126 |
1454 | 127 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module); |
128 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
129 | |
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130 allocated = 0; |
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131 root = 0; |
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132 dir_tested = 0; |
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133 name = NULL; |
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134 path.data = NULL; |
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135 |
509 | 136 index = ilcf->indices->elts; |
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137 for (i = 0; i < ilcf->indices->nelts; i++) { |
509 | 138 |
139 if (index[i].lengths == NULL) { | |
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140 |
509 | 141 if (index[i].name.data[0] == '/') { |
142 return ngx_http_internal_redirect(r, &index[i].name, &r->args); | |
143 } | |
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144 |
509 | 145 len = ilcf->max_index_len; |
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146 nlen = index[i].name.len; |
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147 |
509 | 148 } else { |
149 ngx_memzero(&e, sizeof(ngx_http_script_engine_t)); | |
201
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150 |
509 | 151 e.ip = index[i].lengths->elts; |
152 e.request = r; | |
573 | 153 e.flushed = 1; |
509 | 154 |
563 | 155 /* 1 byte for terminating '\0' */ |
557 | 156 |
563 | 157 len = 1; |
201
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158 |
509 | 159 while (*(uintptr_t *) e.ip) { |
160 lcode = *(ngx_http_script_len_code_pt *) e.ip; | |
161 len += lcode(&e); | |
162 } | |
44
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163 |
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164 nlen = len; |
563 | 165 |
166 /* 16 bytes are preallocation */ | |
167 | |
168 len += 16; | |
509 | 169 } |
201
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170 |
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171 if (len > (size_t) (path.data + allocated - name)) { |
557 | 172 |
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173 name = ngx_http_map_uri_to_path(r, &path, &root, len); |
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174 if (name == NULL) { |
557 | 175 return NGX_ERROR; |
201
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176 } |
557 | 177 |
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178 allocated = path.len; |
287
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179 } |
201
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180 |
509 | 181 if (index[i].values == NULL) { |
557 | 182 |
183 /* index[i].name.len includes the terminating '\0' */ | |
184 | |
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185 ngx_memcpy(name, index[i].name.data, index[i].name.len); |
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186 |
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187 path.len = (name + index[i].name.len - 1) - path.data; |
1454 | 188 |
509 | 189 } else { |
190 e.ip = index[i].values->elts; | |
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191 e.pos = name; |
293
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192 |
509 | 193 while (*(uintptr_t *) e.ip) { |
194 code = *(ngx_http_script_code_pt *) e.ip; | |
195 code((ngx_http_script_engine_t *) &e); | |
396
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196 } |
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197 |
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198 if (*name == '/') { |
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199 uri.len = nlen - 1; |
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200 uri.data = name; |
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201 return ngx_http_internal_redirect(r, &uri, &r->args); |
396
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202 } |
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203 |
1454 | 204 path.len = e.pos - path.data; |
205 | |
509 | 206 *e.pos++ = '\0'; |
293
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207 } |
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208 |
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209 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "open index \"%V\"", &path); |
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210 |
1454 | 211 of.test_dir = 0; |
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212 of.valid = clcf->open_file_cache_valid; |
1772 | 213 of.min_uses = clcf->open_file_cache_min_uses; |
1454 | 214 of.errors = clcf->open_file_cache_errors; |
1457 | 215 of.events = clcf->open_file_cache_events; |
563 | 216 |
1454 | 217 rc = ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool); |
144
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218 |
1454 | 219 if (rc == NGX_ERROR) { |
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220 |
1454 | 221 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, of.err, |
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222 ngx_open_file_n " \"%s\" failed", path.data); |
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223 |
1454 | 224 if (of.err == 0) { |
225 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
226 } | |
47
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227 |
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228 if (of.err == NGX_ENOTDIR || of.err == NGX_EACCES) { |
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229 return ngx_http_index_error(r, path.data, of.err); |
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230 } |
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231 |
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232 if (!dir_tested) { |
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233 rc = ngx_http_index_test_dir(r, clcf, path.data, name - 1); |
46
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234 |
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235 if (rc != NGX_OK) { |
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236 return rc; |
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237 } |
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238 |
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239 dir_tested = 1; |
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240 } |
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241 |
1454 | 242 if (of.err == NGX_ENOENT) { |
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243 continue; |
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244 } |
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245 |
1454 | 246 ngx_log_error(NGX_LOG_ERR, log, of.err, |
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247 ngx_open_file_n " \"%s\" failed", path.data); |
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248 |
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249 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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250 } |
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251 |
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252 uri.len = r->uri.len + nlen - 1; |
557 | 253 |
254 if (!clcf->alias) { | |
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255 uri.data = path.data + root; |
557 | 256 |
257 } else { | |
258 uri.data = ngx_palloc(r->pool, uri.len); | |
259 if (uri.data == NULL) { | |
260 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
261 } | |
262 | |
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263 p = ngx_copy(uri.data, r->uri.data, r->uri.len); |
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264 ngx_memcpy(p, name, nlen - 1); |
199
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265 } |
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266 |
557 | 267 return ngx_http_internal_redirect(r, &uri, &r->args); |
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268 } |
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269 |
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270 return NGX_DECLINED; |
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271 } |
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272 |
24
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273 |
509 | 274 static ngx_int_t |
1454 | 275 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, |
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276 u_char *path, u_char *last) |
509 | 277 { |
1454 | 278 u_char c; |
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279 ngx_str_t dir; |
1454 | 280 ngx_open_file_info_t of; |
509 | 281 |
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282 c = *last; |
1627 | 283 if (c != '/' || path == last) { |
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284 /* "alias" without trailing slash */ |
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285 c = *(++last); |
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286 } |
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287 *last = '\0'; |
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288 |
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289 dir.len = last - path; |
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290 dir.data = path; |
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291 |
1454 | 292 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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293 "http index check dir: \"%V\"", &dir); |
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294 |
1454 | 295 of.test_dir = 1; |
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296 of.valid = clcf->open_file_cache_valid; |
1772 | 297 of.min_uses = 0; |
1454 | 298 of.errors = clcf->open_file_cache_errors; |
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299 |
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300 if (ngx_open_cached_file(clcf->open_file_cache, &dir, &of, r->pool) |
1454 | 301 != NGX_OK) |
302 { | |
303 if (of.err) { | |
304 | |
305 if (of.err == NGX_ENOENT) { | |
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306 *last = c; |
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307 return ngx_http_index_error(r, dir.data, NGX_ENOENT); |
1454 | 308 } |
309 | |
310 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err, | |
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311 ngx_open_file_n " \"%s\" failed", dir.data); |
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312 } |
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313 |
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314 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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315 } |
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316 |
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317 *last = c; |
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318 |
1454 | 319 if (of.is_dir) { |
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320 return NGX_OK; |
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321 } |
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322 |
509 | 323 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
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324 "\"%s\" is not a directory", dir.data); |
509 | 325 |
326 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
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327 } |
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328 |
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329 |
509 | 330 static ngx_int_t |
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331 ngx_http_index_error(ngx_http_request_t *r, u_char *file, ngx_err_t err) |
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332 { |
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333 if (err == NGX_EACCES) { |
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334 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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335 "\"%s\" is forbidden", file); |
577 | 336 |
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337 return NGX_HTTP_FORBIDDEN; |
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338 } |
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339 |
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340 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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341 "\"%s\" is not found", file); |
509 | 342 |
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343 return NGX_HTTP_NOT_FOUND; |
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344 } |
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345 |
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346 |
509 | 347 static void * |
348 ngx_http_index_create_loc_conf(ngx_conf_t *cf) | |
349 { | |
350 ngx_http_index_loc_conf_t *conf; | |
351 | |
352 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t)); | |
353 if (conf == NULL) { | |
354 return NGX_CONF_ERROR; | |
355 } | |
356 | |
357 conf->indices = NULL; | |
681 | 358 conf->max_index_len = 0; |
509 | 359 |
360 return conf; | |
361 } | |
362 | |
363 | |
364 static char * | |
365 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
366 { | |
367 ngx_http_index_loc_conf_t *prev = parent; | |
368 ngx_http_index_loc_conf_t *conf = child; | |
369 | |
370 ngx_http_index_t *index; | |
371 | |
372 if (conf->indices == NULL) { | |
373 conf->indices = prev->indices; | |
374 conf->max_index_len = prev->max_index_len; | |
375 } | |
376 | |
377 if (conf->indices == NULL) { | |
378 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t)); | |
379 if (conf->indices == NULL) { | |
380 return NGX_CONF_ERROR; | |
381 } | |
382 | |
383 index = ngx_array_push(conf->indices); | |
384 if (index == NULL) { | |
385 return NGX_CONF_ERROR; | |
386 } | |
387 | |
388 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
389 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX; | |
390 index->lengths = NULL; | |
391 index->values = NULL; | |
392 | |
393 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
394 | |
395 return NGX_CONF_OK; | |
396 } | |
397 | |
398 return NGX_CONF_OK; | |
399 } | |
400 | |
401 | |
681 | 402 static ngx_int_t |
403 ngx_http_index_init(ngx_conf_t *cf) | |
404 { | |
405 ngx_http_handler_pt *h; | |
406 ngx_http_core_main_conf_t *cmcf; | |
407 | |
408 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
409 | |
410 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); | |
411 if (h == NULL) { | |
412 return NGX_ERROR; | |
413 } | |
414 | |
415 *h = ngx_http_index_handler; | |
416 | |
417 return NGX_OK; | |
418 } | |
419 | |
420 | |
509 | 421 /* TODO: warn about duplicate indices */ |
422 | |
423 static char * | |
424 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
425 { | |
426 ngx_http_index_loc_conf_t *ilcf = conf; | |
427 | |
681 | 428 ngx_str_t *value; |
509 | 429 ngx_uint_t i, n; |
430 ngx_http_index_t *index; | |
431 ngx_http_script_compile_t sc; | |
432 | |
433 if (ilcf->indices == NULL) { | |
434 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t)); | |
435 if (ilcf->indices == NULL) { | |
436 return NGX_CONF_ERROR; | |
437 } | |
438 } | |
439 | |
440 value = cf->args->elts; | |
441 | |
442 for (i = 1; i < cf->args->nelts; i++) { | |
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443 |
509 | 444 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) { |
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445 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
509 | 446 "only the last index in \"index\" directive " |
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447 "should be absolute"); |
509 | 448 } |
449 | |
450 if (value[i].len == 0) { | |
451 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
452 "index \"%V\" in \"index\" directive is invalid", | |
453 &value[1]); | |
454 return NGX_CONF_ERROR; | |
455 } | |
456 | |
457 index = ngx_array_push(ilcf->indices); | |
458 if (index == NULL) { | |
459 return NGX_CONF_ERROR; | |
460 } | |
461 | |
462 index->name.len = value[i].len; | |
463 index->name.data = value[i].data; | |
464 index->lengths = NULL; | |
465 index->values = NULL; | |
466 | |
467 n = ngx_http_script_variables_count(&value[i]); | |
468 | |
469 if (n == 0) { | |
681 | 470 if (ilcf->max_index_len < index->name.len) { |
509 | 471 ilcf->max_index_len = index->name.len; |
472 } | |
473 | |
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474 if (index->name.data[0] == '/') { |
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475 continue; |
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476 } |
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477 |
573 | 478 /* include the terminating '\0' to the length to use ngx_copy() */ |
557 | 479 index->name.len++; |
480 | |
509 | 481 continue; |
482 } | |
483 | |
484 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
485 | |
486 sc.cf = cf; | |
487 sc.source = &value[i]; | |
488 sc.lengths = &index->lengths; | |
489 sc.values = &index->values; | |
490 sc.variables = n; | |
491 sc.complete_lengths = 1; | |
492 sc.complete_values = 1; | |
493 | |
494 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
495 return NGX_CONF_ERROR; | |
496 } | |
497 } | |
498 | |
499 return NGX_CONF_OK; | |
500 } |