Mercurial > hg > nginx
annotate src/http/modules/ngx_http_index_module.c @ 3440:88741ec7731a stable-0.7
merge r3294, r3305:
Fix a bug introduced in r2032: After a child process has read a terminate
message from a channel, the process tries to read the channel again.
The kernel (at least FreeBSD) may preempt the process and sends a SIGIO
signal to a master process. The master process sends a new terminate message,
the kernel switches again to the the child process, and the child process
reads the messages instead of an EAGAIN error. And this may repeat over
and over. Being that the child process can not exit the cycle and test
the termination flag set by the message handler.
The fix disallow the master process to send a new terminate message on
SIGIO signal reception. It may send the message only on SIGALARM signal.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Mon, 01 Feb 2010 15:49:36 +0000 |
| parents | 9ecd253fcc90 |
| children | 975f0558aab3 8152369f7037 |
| 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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10 |
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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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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 } | |
|
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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 |
| 3429 | 225 if (of.err == NGX_ENOTDIR |
| 226 || of.err == NGX_ENAMETOOLONG | |
| 227 || of.err == NGX_EACCES) | |
| 228 { | |
|
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229 return ngx_http_index_error(r, clcf, 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); |
|
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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; |
|
41
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244 } |
|
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245 |
|
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246 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err, |
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247 "%s \"%s\" failed", of.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 + len - 1; |
| 557 | 253 |
| 254 if (!clcf->alias) { | |
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255 uri.data = path.data + root; |
| 557 | 256 |
| 257 } else { | |
| 2049 | 258 uri.data = ngx_pnalloc(r->pool, uri.len); |
| 557 | 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, len - 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); |
|
47
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294 |
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295 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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296 |
| 1454 | 297 of.test_dir = 1; |
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298 of.test_only = 1; |
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299 of.valid = clcf->open_file_cache_valid; |
| 1454 | 300 of.errors = clcf->open_file_cache_errors; |
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301 |
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302 if (ngx_open_cached_file(clcf->open_file_cache, &dir, &of, r->pool) |
| 1454 | 303 != NGX_OK) |
| 304 { | |
| 305 if (of.err) { | |
| 306 | |
| 307 if (of.err == NGX_ENOENT) { | |
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308 *last = c; |
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309 return ngx_http_index_error(r, clcf, dir.data, NGX_ENOENT); |
| 1454 | 310 } |
| 311 | |
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312 if (of.err == NGX_EACCES) { |
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313 |
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314 *last = c; |
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315 |
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316 /* |
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317 * ngx_http_index_test_dir() is called after the first index |
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318 * file testing has returned an error distinct from NGX_EACCES. |
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319 * This means that directory searching is allowed. |
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320 */ |
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321 |
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322 return NGX_OK; |
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323 } |
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324 |
| 1454 | 325 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err, |
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326 "%s \"%s\" failed", of.failed, dir.data); |
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327 } |
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328 |
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329 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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330 } |
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331 |
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332 *last = c; |
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333 |
| 1454 | 334 if (of.is_dir) { |
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335 return NGX_OK; |
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336 } |
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337 |
| 509 | 338 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
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339 "\"%s\" is not a directory", dir.data); |
| 509 | 340 |
| 341 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
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342 } |
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343 |
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344 |
| 509 | 345 static ngx_int_t |
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346 ngx_http_index_error(ngx_http_request_t *r, ngx_http_core_loc_conf_t *clcf, |
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347 u_char *file, ngx_err_t err) |
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348 { |
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349 if (err == NGX_EACCES) { |
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350 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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351 "\"%s\" is forbidden", file); |
| 577 | 352 |
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353 return NGX_HTTP_FORBIDDEN; |
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354 } |
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355 |
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356 if (clcf->log_not_found) { |
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357 ngx_log_error(NGX_LOG_ERR, r->connection->log, err, |
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358 "\"%s\" is not found", file); |
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359 } |
| 509 | 360 |
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361 return NGX_HTTP_NOT_FOUND; |
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362 } |
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363 |
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364 |
| 509 | 365 static void * |
| 366 ngx_http_index_create_loc_conf(ngx_conf_t *cf) | |
| 367 { | |
| 368 ngx_http_index_loc_conf_t *conf; | |
| 369 | |
| 370 conf = ngx_palloc(cf->pool, sizeof(ngx_http_index_loc_conf_t)); | |
| 371 if (conf == NULL) { | |
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372 return NULL; |
| 509 | 373 } |
| 374 | |
| 375 conf->indices = NULL; | |
| 681 | 376 conf->max_index_len = 0; |
| 509 | 377 |
| 378 return conf; | |
| 379 } | |
| 380 | |
| 381 | |
| 382 static char * | |
| 383 ngx_http_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 384 { | |
| 385 ngx_http_index_loc_conf_t *prev = parent; | |
| 386 ngx_http_index_loc_conf_t *conf = child; | |
| 387 | |
| 388 ngx_http_index_t *index; | |
| 389 | |
| 390 if (conf->indices == NULL) { | |
| 391 conf->indices = prev->indices; | |
| 392 conf->max_index_len = prev->max_index_len; | |
| 393 } | |
| 394 | |
| 395 if (conf->indices == NULL) { | |
| 396 conf->indices = ngx_array_create(cf->pool, 1, sizeof(ngx_http_index_t)); | |
| 397 if (conf->indices == NULL) { | |
| 398 return NGX_CONF_ERROR; | |
| 399 } | |
| 400 | |
| 401 index = ngx_array_push(conf->indices); | |
| 402 if (index == NULL) { | |
| 403 return NGX_CONF_ERROR; | |
| 404 } | |
| 405 | |
| 406 index->name.len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
| 407 index->name.data = (u_char *) NGX_HTTP_DEFAULT_INDEX; | |
| 408 index->lengths = NULL; | |
| 409 index->values = NULL; | |
| 410 | |
| 411 conf->max_index_len = sizeof(NGX_HTTP_DEFAULT_INDEX); | |
| 412 | |
| 413 return NGX_CONF_OK; | |
| 414 } | |
| 415 | |
| 416 return NGX_CONF_OK; | |
| 417 } | |
| 418 | |
| 419 | |
| 681 | 420 static ngx_int_t |
| 421 ngx_http_index_init(ngx_conf_t *cf) | |
| 422 { | |
| 423 ngx_http_handler_pt *h; | |
| 424 ngx_http_core_main_conf_t *cmcf; | |
| 425 | |
| 426 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
| 427 | |
| 428 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); | |
| 429 if (h == NULL) { | |
| 430 return NGX_ERROR; | |
| 431 } | |
| 432 | |
| 433 *h = ngx_http_index_handler; | |
| 434 | |
| 435 return NGX_OK; | |
| 436 } | |
| 437 | |
| 438 | |
| 509 | 439 /* TODO: warn about duplicate indices */ |
| 440 | |
| 441 static char * | |
| 442 ngx_http_index_set_index(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 443 { | |
| 444 ngx_http_index_loc_conf_t *ilcf = conf; | |
| 445 | |
| 681 | 446 ngx_str_t *value; |
| 509 | 447 ngx_uint_t i, n; |
| 448 ngx_http_index_t *index; | |
| 449 ngx_http_script_compile_t sc; | |
| 450 | |
| 451 if (ilcf->indices == NULL) { | |
| 452 ilcf->indices = ngx_array_create(cf->pool, 2, sizeof(ngx_http_index_t)); | |
| 453 if (ilcf->indices == NULL) { | |
| 454 return NGX_CONF_ERROR; | |
| 455 } | |
| 456 } | |
| 457 | |
| 458 value = cf->args->elts; | |
| 459 | |
| 460 for (i = 1; i < cf->args->nelts; i++) { | |
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461 |
| 509 | 462 if (value[i].data[0] == '/' && i != cf->args->nelts - 1) { |
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463 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
| 509 | 464 "only the last index in \"index\" directive " |
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465 "should be absolute"); |
| 509 | 466 } |
| 467 | |
| 468 if (value[i].len == 0) { | |
| 469 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 470 "index \"%V\" in \"index\" directive is invalid", | |
| 471 &value[1]); | |
| 472 return NGX_CONF_ERROR; | |
| 473 } | |
| 474 | |
| 475 index = ngx_array_push(ilcf->indices); | |
| 476 if (index == NULL) { | |
| 477 return NGX_CONF_ERROR; | |
| 478 } | |
| 479 | |
| 480 index->name.len = value[i].len; | |
| 481 index->name.data = value[i].data; | |
| 482 index->lengths = NULL; | |
| 483 index->values = NULL; | |
| 484 | |
| 485 n = ngx_http_script_variables_count(&value[i]); | |
| 486 | |
| 487 if (n == 0) { | |
| 681 | 488 if (ilcf->max_index_len < index->name.len) { |
| 509 | 489 ilcf->max_index_len = index->name.len; |
| 490 } | |
| 491 | |
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492 if (index->name.data[0] == '/') { |
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493 continue; |
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494 } |
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495 |
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496 /* include the terminating '\0' to the length to use ngx_memcpy() */ |
| 557 | 497 index->name.len++; |
| 498 | |
| 509 | 499 continue; |
| 500 } | |
| 501 | |
| 502 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
| 503 | |
| 504 sc.cf = cf; | |
| 505 sc.source = &value[i]; | |
| 506 sc.lengths = &index->lengths; | |
| 507 sc.values = &index->values; | |
| 508 sc.variables = n; | |
| 509 sc.complete_lengths = 1; | |
| 510 sc.complete_values = 1; | |
| 511 | |
| 512 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
| 513 return NGX_CONF_ERROR; | |
| 514 } | |
| 515 } | |
| 516 | |
| 517 return NGX_CONF_OK; | |
| 518 } |