1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10 #include <ngx_http.h>
11
12
13 static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r);
14 static ngx_int_t ngx_http_static_init(ngx_conf_t *cf);
15
16
17 static ngx_http_module_t ngx_http_static_module_ctx = {
18 NULL, /* preconfiguration */
19 ngx_http_static_init, /* postconfiguration */
20
21 NULL, /* create main configuration */
22 NULL, /* init main configuration */
23
24 NULL, /* create server configuration */
25 NULL, /* merge server configuration */
26
27 NULL, /* create location configuration */
28 NULL /* merge location configuration */
29 };
30
31
32 ngx_module_t ngx_http_static_module = {
33 NGX_MODULE_V1,
34 &ngx_http_static_module_ctx, /* module context */
35 NULL, /* module directives */
36 NGX_HTTP_MODULE, /* module type */
37 NULL, /* init master */
38 NULL, /* init module */
39 NULL, /* init process */
40 NULL, /* init thread */
41 NULL, /* exit thread */
42 NULL, /* exit process */
43 NULL, /* exit master */
44 NGX_MODULE_V1_PADDING
45 };
46
47
48 static ngx_int_t
ngx_http_static_handler(ngx_http_request_t * r)49 ngx_http_static_handler(ngx_http_request_t *r)
50 {
51 u_char *last, *location;
52 size_t root, len;
53 ngx_str_t path;
54 ngx_int_t rc;
55 ngx_uint_t level;
56 ngx_log_t *log;
57 ngx_buf_t *b;
58 ngx_chain_t out;
59 ngx_open_file_info_t of;
60 ngx_http_core_loc_conf_t *clcf;
61
62 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) {
63 return NGX_HTTP_NOT_ALLOWED;
64 }
65
66 if (r->uri.data[r->uri.len - 1] == '/') {
67 return NGX_DECLINED;
68 }
69
70 log = r->connection->log;
71
72 /*
73 * ngx_http_map_uri_to_path() allocates memory for terminating '\0'
74 * so we do not need to reserve memory for '/' for possible redirect
75 */
76
77 last = ngx_http_map_uri_to_path(r, &path, &root, 0);
78 if (last == NULL) {
79 return NGX_HTTP_INTERNAL_SERVER_ERROR;
80 }
81
82 path.len = last - path.data;
83
84 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
85 "http filename: \"%s\"", path.data);
86
87 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
88
89 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
90
91 of.read_ahead = clcf->read_ahead;
92 of.directio = clcf->directio;
93 of.valid = clcf->open_file_cache_valid;
94 of.min_uses = clcf->open_file_cache_min_uses;
95 of.errors = clcf->open_file_cache_errors;
96 of.events = clcf->open_file_cache_events;
97
98 if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
99 return NGX_HTTP_INTERNAL_SERVER_ERROR;
100 }
101
102 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
103 != NGX_OK)
104 {
105 switch (of.err) {
106
107 case 0:
108 return NGX_HTTP_INTERNAL_SERVER_ERROR;
109
110 case NGX_ENOENT:
111 case NGX_ENOTDIR:
112 case NGX_ENAMETOOLONG:
113
114 level = NGX_LOG_ERR;
115 rc = NGX_HTTP_NOT_FOUND;
116 break;
117
118 case NGX_EACCES:
119 #if (NGX_HAVE_OPENAT)
120 case NGX_EMLINK:
121 case NGX_ELOOP:
122 #endif
123
124 level = NGX_LOG_ERR;
125 rc = NGX_HTTP_FORBIDDEN;
126 break;
127
128 default:
129
130 level = NGX_LOG_CRIT;
131 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
132 break;
133 }
134
135 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
136 ngx_log_error(level, log, of.err,
137 "%s \"%s\" failed", of.failed, path.data);
138 }
139
140 return rc;
141 }
142
143 r->root_tested = !r->error_page;
144
145 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", of.fd);
146
147 if (of.is_dir) {
148
149 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
150
151 ngx_http_clear_location(r);
152
153 r->headers_out.location = ngx_list_push(&r->headers_out.headers);
154 if (r->headers_out.location == NULL) {
155 return NGX_HTTP_INTERNAL_SERVER_ERROR;
156 }
157
158 len = r->uri.len + 1;
159
160 if (!clcf->alias && r->args.len == 0) {
161 location = path.data + root;
162
163 *last = '/';
164
165 } else {
166 if (r->args.len) {
167 len += r->args.len + 1;
168 }
169
170 location = ngx_pnalloc(r->pool, len);
171 if (location == NULL) {
172 ngx_http_clear_location(r);
173 return NGX_HTTP_INTERNAL_SERVER_ERROR;
174 }
175
176 last = ngx_copy(location, r->uri.data, r->uri.len);
177
178 *last = '/';
179
180 if (r->args.len) {
181 *++last = '?';
182 ngx_memcpy(++last, r->args.data, r->args.len);
183 }
184 }
185
186 r->headers_out.location->hash = 1;
187 ngx_str_set(&r->headers_out.location->key, "Location");
188 r->headers_out.location->value.len = len;
189 r->headers_out.location->value.data = location;
190
191 return NGX_HTTP_MOVED_PERMANENTLY;
192 }
193
194 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */
195
196 if (!of.is_file) {
197 ngx_log_error(NGX_LOG_CRIT, log, 0,
198 "\"%s\" is not a regular file", path.data);
199
200 return NGX_HTTP_NOT_FOUND;
201 }
202
203 #endif
204
205 if (r->method == NGX_HTTP_POST) {
206 return NGX_HTTP_NOT_ALLOWED;
207 }
208
209 rc = ngx_http_discard_request_body(r);
210
211 if (rc != NGX_OK) {
212 return rc;
213 }
214
215 log->action = "sending response to client";
216
217 r->headers_out.status = NGX_HTTP_OK;
218 r->headers_out.content_length_n = of.size;
219 r->headers_out.last_modified_time = of.mtime;
220
221 if (ngx_http_set_etag(r) != NGX_OK) {
222 return NGX_HTTP_INTERNAL_SERVER_ERROR;
223 }
224
225 if (ngx_http_set_content_type(r) != NGX_OK) {
226 return NGX_HTTP_INTERNAL_SERVER_ERROR;
227 }
228
229 if (r != r->main && of.size == 0) {
230 return ngx_http_send_header(r);
231 }
232
233 r->allow_ranges = 1;
234
235 /* we need to allocate all before the header would be sent */
236
237 b = ngx_calloc_buf(r->pool);
238 if (b == NULL) {
239 return NGX_HTTP_INTERNAL_SERVER_ERROR;
240 }
241
242 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
243 if (b->file == NULL) {
244 return NGX_HTTP_INTERNAL_SERVER_ERROR;
245 }
246
247 rc = ngx_http_send_header(r);
248
249 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
250 return rc;
251 }
252
253 b->file_pos = 0;
254 b->file_last = of.size;
255
256 b->in_file = b->file_last ? 1: 0;
257 b->last_buf = (r == r->main) ? 1: 0;
258 b->last_in_chain = 1;
259
260 b->file->fd = of.fd;
261 b->file->name = path;
262 b->file->log = log;
263 b->file->directio = of.is_directio;
264
265 out.buf = b;
266 out.next = NULL;
267
268 return ngx_http_output_filter(r, &out);
269 }
270
271
272 static ngx_int_t
ngx_http_static_init(ngx_conf_t * cf)273 ngx_http_static_init(ngx_conf_t *cf)
274 {
275 ngx_http_handler_pt *h;
276 ngx_http_core_main_conf_t *cmcf;
277
278 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
279
280 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
281 if (h == NULL) {
282 return NGX_ERROR;
283 }
284
285 *h = ngx_http_static_handler;
286
287 return NGX_OK;
288 }
289