Mercurial > hg > nginx
annotate src/http/modules/ngx_http_index_module.c @ 2410:bbfaeb220e90
postpone zlib memory allocation
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 16 Dec 2008 16:09:39 +0000 |
parents | 5c0c7f65f8f0 |
children | a9abdddaa92d |
rev | line source |
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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, |
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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); |
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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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; |
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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 /* TODO: Win32 */ |
120 if (r->zero_in_uri) { | |
121 return NGX_DECLINED; | |
122 } | |
123 | |
1454 | 124 ilcf = ngx_http_get_module_loc_conf(r, ngx_http_index_module); |
125 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
126 | |
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127 allocated = 0; |
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128 root = 0; |
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129 dir_tested = 0; |
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130 name = NULL; |
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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) { | |
287
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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 } | |
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141 |
509 | 142 len = ilcf->max_index_len; |
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143 nlen = index[i].name.len; |
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144 |
509 | 145 } else { |
146 ngx_memzero(&e, sizeof(ngx_http_script_engine_t)); | |
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147 |
509 | 148 e.ip = index[i].lengths->elts; |
149 e.request = r; | |
573 | 150 e.flushed = 1; |
509 | 151 |
563 | 152 /* 1 byte for terminating '\0' */ |
557 | 153 |
563 | 154 len = 1; |
201
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155 |
509 | 156 while (*(uintptr_t *) e.ip) { |
157 lcode = *(ngx_http_script_len_code_pt *) e.ip; | |
158 len += lcode(&e); | |
159 } | |
44
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160 |
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161 nlen = len; |
563 | 162 |
163 /* 16 bytes are preallocation */ | |
164 | |
165 len += 16; | |
509 | 166 } |
201
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167 |
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168 if (len > (size_t) (path.data + allocated - name)) { |
557 | 169 |
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170 name = ngx_http_map_uri_to_path(r, &path, &root, len); |
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171 if (name == NULL) { |
557 | 172 return NGX_ERROR; |
201
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173 } |
557 | 174 |
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175 allocated = path.len; |
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176 } |
201
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177 |
509 | 178 if (index[i].values == NULL) { |
557 | 179 |
180 /* index[i].name.len includes the terminating '\0' */ | |
181 | |
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182 ngx_memcpy(name, index[i].name.data, index[i].name.len); |
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183 |
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184 path.len = (name + index[i].name.len - 1) - path.data; |
1454 | 185 |
509 | 186 } else { |
187 e.ip = index[i].values->elts; | |
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188 e.pos = name; |
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189 |
509 | 190 while (*(uintptr_t *) e.ip) { |
191 code = *(ngx_http_script_code_pt *) e.ip; | |
192 code((ngx_http_script_engine_t *) &e); | |
396
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193 } |
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194 |
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195 if (*name == '/') { |
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196 uri.len = nlen - 1; |
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197 uri.data = name; |
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198 return ngx_http_internal_redirect(r, &uri, &r->args); |
396
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199 } |
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200 |
1454 | 201 path.len = e.pos - path.data; |
202 | |
509 | 203 *e.pos++ = '\0'; |
293
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204 } |
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205 |
2405 | 206 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
207 "open index \"%V\"", &path); | |
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208 |
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209 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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210 |
2129 | 211 of.directio = clcf->directio; |
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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 |
1799 | 217 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool) |
218 != NGX_OK) | |
219 { | |
2405 | 220 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, of.err, |
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221 ngx_open_file_n " \"%s\" failed", path.data); |
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222 |
1454 | 223 if (of.err == 0) { |
224 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
225 } | |
47
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226 |
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227 if (of.err == NGX_ENOTDIR || of.err == NGX_EACCES) { |
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228 return ngx_http_index_error(r, clcf, path.data, of.err); |
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229 } |
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230 |
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231 if (!dir_tested) { |
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232 rc = ngx_http_index_test_dir(r, clcf, path.data, name - 1); |
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233 |
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234 if (rc != NGX_OK) { |
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235 return rc; |
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236 } |
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237 |
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238 dir_tested = 1; |
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239 } |
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240 |
1454 | 241 if (of.err == NGX_ENOENT) { |
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242 continue; |
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243 } |
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244 |
2405 | 245 ngx_log_error(NGX_LOG_ERR, r->connection->log, of.err, |
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246 ngx_open_file_n " \"%s\" failed", path.data); |
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247 |
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248 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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249 } |
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250 |
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251 uri.len = r->uri.len + nlen - 1; |
557 | 252 |
253 if (!clcf->alias) { | |
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254 uri.data = path.data + root; |
557 | 255 |
256 } else { | |
2049 | 257 uri.data = ngx_pnalloc(r->pool, uri.len); |
557 | 258 if (uri.data == NULL) { |
259 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
260 } | |
261 | |
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262 p = ngx_copy(uri.data, r->uri.data, r->uri.len); |
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263 ngx_memcpy(p, name, nlen - 1); |
199
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264 } |
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265 |
557 | 266 return ngx_http_internal_redirect(r, &uri, &r->args); |
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267 } |
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268 |
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269 return NGX_DECLINED; |
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270 } |
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271 |
24
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272 |
509 | 273 static ngx_int_t |
1454 | 274 ngx_http_index_test_dir(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, |
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275 u_char *path, u_char *last) |
509 | 276 { |
1454 | 277 u_char c; |
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278 ngx_str_t dir; |
1454 | 279 ngx_open_file_info_t of; |
509 | 280 |
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281 c = *last; |
1627 | 282 if (c != '/' || path == last) { |
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283 /* "alias" without trailing slash */ |
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284 c = *(++last); |
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285 } |
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286 *last = '\0'; |
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287 |
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288 dir.len = last - path; |
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289 dir.data = path; |
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290 |
1454 | 291 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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292 "http index check dir: \"%V\"", &dir); |
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293 |
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294 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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295 |
1454 | 296 of.test_dir = 1; |
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297 of.valid = clcf->open_file_cache_valid; |
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, clcf, dir.data, NGX_ENOENT); |
1454 | 308 } |
309 | |
2181
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310 if (of.err == NGX_EACCES) { |
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311 |
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312 *last = c; |
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313 |
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314 /* |
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315 * ngx_http_index_test_dir() is called after the first index |
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316 * file testing has returned an error distinct from NGX_EACCES. |
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317 * This means that directory searching is allowed. |
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318 */ |
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319 |
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320 return NGX_OK; |
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321 } |
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322 |
1454 | 323 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err, |
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324 ngx_open_file_n " \"%s\" failed", dir.data); |
46
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325 } |
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326 |
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327 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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328 } |
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329 |
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330 *last = c; |
47
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331 |
1454 | 332 if (of.is_dir) { |
46
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333 return NGX_OK; |
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334 } |
46
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335 |
509 | 336 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
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337 "\"%s\" is not a directory", dir.data); |
509 | 338 |
339 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
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340 } |
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341 |
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342 |
509 | 343 static ngx_int_t |
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344 ngx_http_index_error(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, |
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345 u_char *file, ngx_err_t err) |
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346 { |
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347 if (err == NGX_EACCES) { |
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348 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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349 "\"%s\" is forbidden", file); |
577 | 350 |
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351 return NGX_HTTP_FORBIDDEN; |
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352 } |
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353 |
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354 if (clcf->log_not_found) { |
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355 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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356 "\"%s\" is not found", file); |
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357 } |
509 | 358 |
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359 return NGX_HTTP_NOT_FOUND; |
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360 } |
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361 |
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362 |
509 | 363 static void * |
364 ngx_http_index_create_loc_conf(ngx_conf_t *cf) | |
365 { | |
366 ngx_http_index_loc_conf_t *conf; | |
367 | |
368 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t)); | |
369 if (conf == NULL) { | |
370 return NGX_CONF_ERROR; | |
371 } | |
372 | |
373 conf->indices = NULL; | |
681 | 374 conf->max_index_len = 0; |
509 | 375 |
376 return conf; | |
377 } | |
378 | |
379 | |
380 static char * | |
381 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
382 { | |
383 ngx_http_index_loc_conf_t *prev = parent; | |
384 ngx_http_index_loc_conf_t *conf = child; | |
385 | |
386 ngx_http_index_t *index; | |
387 | |
388 if (conf->indices == NULL) { | |
389 conf->indices = prev->indices; | |
390 conf->max_index_len = prev->max_index_len; | |
391 } | |
392 | |
393 if (conf->indices == NULL) { | |
394 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t)); | |
395 if (conf->indices == NULL) { | |
396 return NGX_CONF_ERROR; | |
397 } | |
398 | |
399 index = ngx_array_push(conf->indices); | |
400 if (index == NULL) { | |
401 return NGX_CONF_ERROR; | |
402 } | |
403 | |
404 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
405 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX; | |
406 index->lengths = NULL; | |
407 index->values = NULL; | |
408 | |
409 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
410 | |
411 return NGX_CONF_OK; | |
412 } | |
413 | |
414 return NGX_CONF_OK; | |
415 } | |
416 | |
417 | |
681 | 418 static ngx_int_t |
419 ngx_http_index_init(ngx_conf_t *cf) | |
420 { | |
421 ngx_http_handler_pt *h; | |
422 ngx_http_core_main_conf_t *cmcf; | |
423 | |
424 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
425 | |
426 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); | |
427 if (h == NULL) { | |
428 return NGX_ERROR; | |
429 } | |
430 | |
431 *h = ngx_http_index_handler; | |
432 | |
433 return NGX_OK; | |
434 } | |
435 | |
436 | |
509 | 437 /* TODO: warn about duplicate indices */ |
438 | |
439 static char * | |
440 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
441 { | |
442 ngx_http_index_loc_conf_t *ilcf = conf; | |
443 | |
681 | 444 ngx_str_t *value; |
509 | 445 ngx_uint_t i, n; |
446 ngx_http_index_t *index; | |
447 ngx_http_script_compile_t sc; | |
448 | |
449 if (ilcf->indices == NULL) { | |
450 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t)); | |
451 if (ilcf->indices == NULL) { | |
452 return NGX_CONF_ERROR; | |
453 } | |
454 } | |
455 | |
456 value = cf->args->elts; | |
457 | |
458 for (i = 1; i < cf->args->nelts; i++) { | |
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459 |
509 | 460 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) { |
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461 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
509 | 462 "only the last index in \"index\" directive " |
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463 "should be absolute"); |
509 | 464 } |
465 | |
466 if (value[i].len == 0) { | |
467 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
468 "index \"%V\" in \"index\" directive is invalid", | |
469 &value[1]); | |
470 return NGX_CONF_ERROR; | |
471 } | |
472 | |
473 index = ngx_array_push(ilcf->indices); | |
474 if (index == NULL) { | |
475 return NGX_CONF_ERROR; | |
476 } | |
477 | |
478 index->name.len = value[i].len; | |
479 index->name.data = value[i].data; | |
480 index->lengths = NULL; | |
481 index->values = NULL; | |
482 | |
483 n = ngx_http_script_variables_count(&value[i]); | |
484 | |
485 if (n == 0) { | |
681 | 486 if (ilcf->max_index_len < index->name.len) { |
509 | 487 ilcf->max_index_len = index->name.len; |
488 } | |
489 | |
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490 if (index->name.data[0] == '/') { |
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491 continue; |
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492 } |
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493 |
573 | 494 /* include the terminating '\0' to the length to use ngx_copy() */ |
557 | 495 index->name.len++; |
496 | |
509 | 497 continue; |
498 } | |
499 | |
500 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
501 | |
502 sc.cf = cf; | |
503 sc.source = &value[i]; | |
504 sc.lengths = &index->lengths; | |
505 sc.values = &index->values; | |
506 sc.variables = n; | |
507 sc.complete_lengths = 1; | |
508 sc.complete_values = 1; | |
509 | |
510 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
511 return NGX_CONF_ERROR; | |
512 } | |
513 } | |
514 | |
515 return NGX_CONF_OK; | |
516 } |