0
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
|
4 */
|
|
5
|
|
6
|
|
7 #include <ngx_config.h>
|
|
8 #include <ngx_core.h>
|
|
9 #include <ngx_http.h>
|
|
10
|
|
11
|
18
|
12 #if (NGX_HAVE_OPENSSL_MD5_H)
|
0
|
13 #include <openssl/md5.h>
|
|
14 #else
|
|
15 #include <md5.h>
|
|
16 #endif
|
|
17
|
18
|
18 #if (NGX_OPENSSL_MD5)
|
0
|
19 #define MD5Init MD5_Init
|
|
20 #define MD5Update MD5_Update
|
|
21 #define MD5Final MD5_Final
|
|
22 #endif
|
|
23
|
|
24
|
26
|
25 ngx_int_t ngx_http_file_cache_get(ngx_http_request_t *r,
|
|
26 ngx_http_cache_ctx_t *ctx)
|
0
|
27 {
|
26
|
28 ngx_uint_t i;
|
|
29 ngx_str_t *key;
|
|
30 ngx_http_cache_t *c;
|
|
31 MD5_CTX md5;
|
0
|
32
|
26
|
33 c = r->cache;
|
0
|
34
|
26
|
35 c->file.name.len = ctx->path->name.len + 1 + ctx->path->len + 32;
|
|
36 if (!(c->file.name.data = ngx_palloc(r->pool, c->file.name.len + 1))) {
|
|
37 return NGX_ABORT;
|
0
|
38 }
|
|
39
|
|
40 MD5Init(&md5);
|
26
|
41
|
|
42 key = c->key.elts;
|
|
43 for (i = 0; i < c->key.nelts; i++) {
|
|
44 MD5Update(&md5, key[i].data, key[i].len);
|
|
45 }
|
0
|
46
|
26
|
47 MD5Update(&md5, ctx->key.data, ctx->key.len);
|
|
48
|
|
49 MD5Final(c->md5, &md5);
|
|
50
|
|
51 ngx_memcpy(c->file.name.data, ctx->path->name.data, ctx->path->name.len);
|
|
52
|
|
53 ngx_md5_text(c->file.name.data + ctx->path->name.len + 1 + ctx->path->len,
|
|
54 c->md5);
|
0
|
55
|
|
56 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
26
|
57 "file cache key: %V, md5: %s", &ctx->key,
|
|
58 c->file.name.data + ctx->path->name.len + 1 + ctx->path->len);
|
0
|
59
|
26
|
60 ngx_create_hashed_filename(&c->file, ctx->path);
|
0
|
61
|
|
62 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
26
|
63 "file cache name: %s", c->file.name.data);
|
0
|
64
|
26
|
65 return ngx_http_file_cache_open(r->cache);
|
0
|
66 }
|
|
67
|
|
68
|
26
|
69 ngx_int_t ngx_http_file_cache_open(ngx_http_cache_t *c)
|
0
|
70 {
|
|
71 ssize_t n;
|
|
72 ngx_err_t err;
|
|
73 ngx_http_cache_header_t *h;
|
|
74
|
26
|
75 c->file.fd = ngx_open_file(c->file.name.data,
|
|
76 NGX_FILE_RDONLY, NGX_FILE_OPEN);
|
0
|
77
|
26
|
78 if (c->file.fd == NGX_INVALID_FILE) {
|
0
|
79 err = ngx_errno;
|
|
80
|
|
81 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
|
|
82 return NGX_DECLINED;
|
|
83 }
|
|
84
|
26
|
85 ngx_log_error(NGX_LOG_CRIT, c->log, ngx_errno,
|
|
86 ngx_open_file_n " \"%s\" failed", c->file.name.data);
|
0
|
87 return NGX_ERROR;
|
|
88 }
|
|
89
|
26
|
90 if (c->uniq) {
|
|
91 if (ngx_fd_info(c->file.fd, &c->file.info) == NGX_FILE_ERROR) {
|
|
92 ngx_log_error(NGX_LOG_CRIT, c->log, ngx_errno,
|
|
93 ngx_fd_info_n " \"%s\" failed", c->file.name.data);
|
0
|
94
|
|
95 return NGX_ERROR;
|
|
96 }
|
|
97
|
26
|
98 if (ngx_file_uniq(&c->file.info) == c->uniq) {
|
|
99 if (ngx_close_file(c->file.fd) == NGX_FILE_ERROR) {
|
|
100 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
0
|
101 ngx_close_file_n " \"%s\" failed",
|
26
|
102 c->file.name.data);
|
0
|
103 }
|
|
104
|
|
105 return NGX_HTTP_CACHE_THE_SAME;
|
|
106 }
|
|
107 }
|
|
108
|
26
|
109 n = ngx_read_file(&c->file, c->buf->pos, c->buf->end - c->buf->last, 0);
|
0
|
110
|
|
111 if (n == NGX_ERROR || n == NGX_AGAIN) {
|
|
112 return n;
|
|
113 }
|
|
114
|
26
|
115 if (n <= c->header_size) {
|
|
116 ngx_log_error(NGX_LOG_CRIT, c->log, 0,
|
|
117 "cache file \"%s\" is too small", c->file.name.data);
|
0
|
118 return NGX_ERROR;
|
|
119 }
|
|
120
|
26
|
121 h = (ngx_http_cache_header_t *) c->buf->pos;
|
|
122 c->expires = h->expires;
|
|
123 c->last_modified= h->last_modified;
|
|
124 c->date = h->date;
|
|
125 c->length = h->length;
|
0
|
126
|
26
|
127 if (h->key_len > (size_t) (c->buf->end - c->buf->pos)) {
|
|
128 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
|
0
|
129 "cache file \"%s\" is probably invalid",
|
26
|
130 c->file.name.data);
|
0
|
131 return NGX_DECLINED;
|
|
132 }
|
|
133
|
26
|
134 #if 0
|
|
135
|
|
136 /* TODO */
|
|
137
|
|
138 if (c->key_len && h->key_len != c->key_len) {
|
|
139
|
|
140 ngx_strncmp(h->key, c->key_data, h->key_len) != 0))
|
|
141
|
0
|
142 h->key[h->key_len] = '\0';
|
26
|
143 ngx_log_error(NGX_LOG_ALERT, c->log, 0,
|
0
|
144 "md5 collision: \"%s\" and \"%s\"",
|
26
|
145 h->key, c->key.data);
|
0
|
146 return NGX_DECLINED;
|
|
147 }
|
|
148
|
26
|
149 #endif
|
0
|
150
|
26
|
151 c->buf->last += n;
|
0
|
152
|
26
|
153 if (c->expires < ngx_time()) {
|
|
154 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
0
|
155 "http file cache expired");
|
|
156 return NGX_HTTP_CACHE_STALE;
|
|
157 }
|
|
158
|
|
159 /* TODO: NGX_HTTP_CACHE_AGED */
|
|
160
|
26
|
161 /* STUB */ return NGX_DECLINED;
|
|
162
|
0
|
163 return NGX_OK;
|
|
164 }
|
|
165
|
|
166
|
26
|
167 #if 0
|
|
168
|
|
169
|
0
|
170 int ngx_http_cache_update_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx,
|
|
171 ngx_str_t *temp_file)
|
|
172 {
|
|
173 int retry;
|
|
174 ngx_err_t err;
|
|
175
|
|
176 retry = 0;
|
|
177
|
|
178 for ( ;; ) {
|
|
179 if (ngx_rename_file(temp_file->data, ctx->file.name.data) == NGX_OK) {
|
|
180 return NGX_OK;
|
|
181 }
|
|
182
|
|
183 err = ngx_errno;
|
|
184
|
10
|
185 #if (NGX_WIN32)
|
0
|
186 if (err == NGX_EEXIST) {
|
|
187 if (ngx_win32_rename_file(temp_file, &ctx->file.name, r->pool)
|
|
188 == NGX_ERROR)
|
|
189 {
|
|
190 return NGX_ERROR;
|
|
191 }
|
|
192 }
|
|
193 #endif
|
|
194
|
|
195 if (retry || (err != NGX_ENOENT && err != NGX_ENOTDIR)) {
|
|
196 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
|
|
197 ngx_rename_file_n "(\"%s\", \"%s\") failed",
|
|
198 temp_file->data, ctx->file.name.data);
|
|
199
|
|
200 return NGX_ERROR;
|
|
201 }
|
|
202
|
|
203 if (ngx_create_path(&ctx->file, ctx->path) == NGX_ERROR) {
|
|
204 return NGX_ERROR;
|
|
205 }
|
|
206
|
|
207 retry = 1;
|
|
208 }
|
|
209 }
|
|
210
|
|
211
|
26
|
212 #endif
|
|
213
|
|
214
|
|
215 ngx_int_t ngx_http_cache_cleaner_handler(ngx_gc_t *gc, ngx_str_t *name,
|
|
216 ngx_dir_t *dir)
|
0
|
217 {
|
26
|
218 int rc;
|
|
219 ngx_buf_t buf;
|
|
220 ngx_http_cache_t c;
|
|
221 u_char data[sizeof(ngx_http_cache_header_t)];
|
0
|
222
|
26
|
223 ngx_memzero(&c, sizeof(ngx_http_cache_t));
|
|
224
|
|
225 c.file.fd = NGX_INVALID_FILE;
|
|
226 c.file.name = *name;
|
|
227 c.file.log = gc->log;
|
0
|
228
|
26
|
229 c.header_size = sizeof(ngx_http_cache_header_t);
|
|
230 c.buf = &buf;
|
|
231 c.log = gc->log;
|
|
232 c.key_len = 0;
|
0
|
233
|
26
|
234 buf.memory = 1;
|
|
235 buf.temporary = 1;
|
0
|
236 buf.pos = data;
|
|
237 buf.last = data;
|
|
238 buf.start = data;
|
|
239 buf.end = data + sizeof(ngx_http_cache_header_t);
|
|
240
|
26
|
241 rc = ngx_http_file_cache_open(&c);
|
0
|
242
|
|
243 /* TODO: NGX_AGAIN */
|
|
244
|
26
|
245 if (rc != NGX_ERROR&& rc != NGX_DECLINED && rc != NGX_HTTP_CACHE_STALE) {
|
0
|
246 return NGX_OK;
|
|
247 }
|
|
248
|
|
249 if (ngx_delete_file(name->data) == NGX_FILE_ERROR) {
|
26
|
250 ngx_log_error(NGX_LOG_CRIT, c.log, ngx_errno,
|
0
|
251 ngx_delete_file_n " \"%s\" failed", name->data);
|
|
252 return NGX_ERROR;
|
|
253 }
|
|
254
|
|
255 gc->deleted++;
|
|
256 gc->freed += ngx_de_size(dir);
|
|
257
|
|
258 return NGX_OK;
|
|
259 }
|