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e4e6a8db | 1 | |
2 | /* | |
262a0e14 | 3 | * $Id$ |
e4e6a8db | 4 | * |
5 | * DEBUG: section 22 Refresh Calculation | |
6 | * AUTHOR: Harvest Derived | |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 9 | * ---------------------------------------------------------- |
e4e6a8db | 10 | * |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
e4e6a8db | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
26ac0430 | 24 | * |
e4e6a8db | 25 | * This program is distributed in the hope that it will be useful, |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
26ac0430 | 29 | * |
e4e6a8db | 30 | * You should have received a copy of the GNU General Public License |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
e4e6a8db | 34 | */ |
35 | ||
36 | #ifndef USE_POSIX_REGEX | |
37 | #define USE_POSIX_REGEX /* put before includes; always use POSIX */ | |
38 | #endif | |
39 | ||
40 | #include "squid.h" | |
62ee09ca | 41 | #include "CacheManager.h" |
e6ccf245 | 42 | #include "Store.h" |
528b2c61 | 43 | #include "MemObject.h" |
a2ac85d9 | 44 | #include "HttpRequest.h" |
924f73bc | 45 | #include "HttpReply.h" |
985c86bc | 46 | #include "SquidTime.h" |
e4e6a8db | 47 | |
7d47d8e6 | 48 | typedef enum { |
65fa5c61 | 49 | rcHTTP, |
50 | rcICP, | |
51 | #if USE_HTCP | |
52 | rcHTCP, | |
53 | #endif | |
54 | #if USE_CACHE_DIGESTS | |
55 | rcCDigest, | |
56 | #endif | |
57 | rcStore, | |
58 | rcCount | |
7d47d8e6 | 59 | } refreshCountsEnum; |
829a9357 | 60 | |
26ac0430 | 61 | typedef struct { |
1f848b2c | 62 | bool expires; |
63 | bool min; | |
64 | bool lmfactor; | |
65 | bool max; | |
2fadd50d | 66 | } stale_flags; |
65fa5c61 | 67 | |
68 | /* | |
69 | * This enumerated list assigns specific values, ala HTTP/FTP status | |
70 | * codes. All Fresh codes are in the range 100-199 and all stale | |
71 | * codes are 200-299. We might want to use these codes in logging, | |
72 | * so best to keep them consistent over time. | |
73 | */ | |
74 | enum { | |
75 | FRESH_REQUEST_MAX_STALE_ALL = 100, | |
76 | FRESH_REQUEST_MAX_STALE_VALUE, | |
77 | FRESH_EXPIRES, | |
78 | FRESH_LMFACTOR_RULE, | |
79 | FRESH_MIN_RULE, | |
80 | FRESH_OVERRIDE_EXPIRES, | |
81 | FRESH_OVERRIDE_LASTMOD, | |
82 | STALE_MUST_REVALIDATE = 200, | |
83 | STALE_RELOAD_INTO_IMS, | |
84 | STALE_FORCED_RELOAD, | |
85 | STALE_EXCEEDS_REQUEST_MAX_AGE_VALUE, | |
86 | STALE_EXPIRES, | |
87 | STALE_MAX_RULE, | |
88 | STALE_LMFACTOR_RULE, | |
89 | STALE_DEFAULT = 299 | |
90 | }; | |
91 | ||
26ac0430 | 92 | static struct RefreshCounts { |
829a9357 | 93 | const char *proto; |
1c3e77cd | 94 | int total; |
65fa5c61 | 95 | int status[STALE_DEFAULT + 1]; |
62e76326 | 96 | } |
97 | ||
98 | refreshCounts[rcCount]; | |
1c3e77cd | 99 | |
e4e6a8db | 100 | /* |
101 | * Defaults: | |
102 | * MIN NONE | |
103 | * PCT 20% | |
104 | * MAX 3 days | |
105 | */ | |
48f44632 | 106 | #define REFRESH_DEFAULT_MIN (time_t)0 |
c3f6d204 | 107 | #define REFRESH_DEFAULT_PCT 0.20 |
48f44632 | 108 | #define REFRESH_DEFAULT_MAX (time_t)259200 |
e4e6a8db | 109 | |
2b5133db | 110 | static const refresh_t *refreshUncompiledPattern(const char *); |
1c3e77cd | 111 | static OBJH refreshStats; |
efd62b86 | 112 | static int refreshStaleness(const StoreEntry * entry, time_t check_time, const time_t age, const refresh_t * R, stale_flags * sf); |
65fa5c61 | 113 | |
114 | static refresh_t DefaultRefresh; | |
2b5133db | 115 | |
38f9c547 | 116 | const refresh_t * |
6018f0de | 117 | refreshLimits(const char *url) |
118 | { | |
119 | const refresh_t *R; | |
62e76326 | 120 | |
6018f0de | 121 | for (R = Config.Refresh; R; R = R->next) { |
62e76326 | 122 | if (!regexec(&(R->compiled_pattern), url, 0, 0, 0)) |
123 | return R; | |
6018f0de | 124 | } |
62e76326 | 125 | |
6018f0de | 126 | return NULL; |
127 | } | |
128 | ||
2b5133db | 129 | static const refresh_t * |
130 | refreshUncompiledPattern(const char *pat) | |
131 | { | |
132 | const refresh_t *R; | |
62e76326 | 133 | |
2b5133db | 134 | for (R = Config.Refresh; R; R = R->next) { |
62e76326 | 135 | if (0 == strcmp(R->pattern, pat)) |
136 | return R; | |
2b5133db | 137 | } |
62e76326 | 138 | |
2b5133db | 139 | return NULL; |
140 | } | |
141 | ||
b2f01ec3 | 142 | /** |
65fa5c61 | 143 | * Calculate how stale the response is (or will be at the check_time). |
144 | * Staleness calculation is based on the following: (1) response | |
145 | * expiration time, (2) age greater than configured maximum, (3) | |
146 | * last-modified factor, and (4) age less than configured minimum. | |
147 | * | |
b2f01ec3 AJ |
148 | * \retval -1 If the response is fresh. |
149 | * \retval >0 Otherwise return it's staleness. | |
150 | * \retval 0 NOTE return value of 0 means the response is stale. | |
65fa5c61 | 151 | * |
152 | * The 'stale_flags' structure is used to tell the calling function | |
153 | * _why_ this response is fresh or stale. Its used, for example, | |
154 | * when the admin wants to override expiration and last-modified | |
155 | * times. | |
156 | */ | |
157 | static int | |
efd62b86 | 158 | refreshStaleness(const StoreEntry * entry, time_t check_time, const time_t age, const refresh_t * R, stale_flags * sf) |
65fa5c61 | 159 | { |
b2f01ec3 AJ |
160 | /** \par |
161 | * Check for an explicit expiration time (Expires: header). | |
65fa5c61 | 162 | */ |
163 | if (entry->expires > -1) { | |
1f848b2c | 164 | sf->expires = true; |
62e76326 | 165 | |
166 | if (entry->expires > check_time) { | |
4a7a3d56 | 167 | debugs(22, 3, "FRESH: expires " << entry->expires << |
168 | " >= check_time " << check_time << " "); | |
bf8fe701 | 169 | |
62e76326 | 170 | return -1; |
171 | } else { | |
4a7a3d56 | 172 | debugs(22, 3, "STALE: expires " << entry->expires << |
173 | " < check_time " << check_time << " "); | |
bf8fe701 | 174 | |
62e76326 | 175 | return (check_time - entry->expires); |
176 | } | |
65fa5c61 | 177 | } |
62e76326 | 178 | |
b2f01ec3 | 179 | /** \par |
65fa5c61 | 180 | * Use local heuristics to determine staleness. Start with the |
181 | * max age from the refresh_pattern rule. | |
182 | */ | |
183 | if (age > R->max) { | |
4a7a3d56 | 184 | debugs(22, 3, "STALE: age " << age << " > max " << R->max << " "); |
1f848b2c | 185 | sf->max = true; |
62e76326 | 186 | return (age - R->max); |
65fa5c61 | 187 | } |
62e76326 | 188 | |
b2f01ec3 AJ |
189 | /** \par |
190 | * Try the last-modified factor algorithm: refresh_pattern n% percentage of Last-Modified: age. | |
65fa5c61 | 191 | */ |
192 | if (entry->lastmod > -1 && entry->timestamp > entry->lastmod) { | |
62e76326 | 193 | /* |
194 | * stale_age is the Age of the response when it became/becomes | |
195 | * stale according to the last-modified factor algorithm. | |
196 | */ | |
197 | time_t stale_age = static_cast<time_t>((entry->timestamp - entry->lastmod) * R->pct); | |
1f848b2c | 198 | sf->lmfactor = true; |
62e76326 | 199 | |
200 | if (age >= stale_age) { | |
4a7a3d56 | 201 | debugs(22, 3, "STALE: age " << age << " > stale_age " << stale_age); |
62e76326 | 202 | return (age - stale_age); |
203 | } else { | |
4a7a3d56 | 204 | debugs(22, 3, "FRESH: age " << age << " <= stale_age " << stale_age); |
62e76326 | 205 | return -1; |
206 | } | |
65fa5c61 | 207 | } |
62e76326 | 208 | |
b2f01ec3 AJ |
209 | /** \par |
210 | * Finally, if all else fails; staleness is determined by the refresh_pattern | |
65fa5c61 | 211 | * configured minimum age. |
212 | */ | |
9e4b5932 | 213 | if (age < R->min) { |
214 | debugs(22, 3, "FRESH: age " << age << " < min " << R->min); | |
1f848b2c | 215 | sf->min = true; |
62e76326 | 216 | return -1; |
65fa5c61 | 217 | } |
62e76326 | 218 | |
9e4b5932 | 219 | debugs(22, 3, "STALE: age " << age << " >= min " << R->min); |
65fa5c61 | 220 | return (age - R->min); |
221 | } | |
222 | ||
b2f01ec3 AJ |
223 | /** |
224 | * \retval 1 if the entry must be revalidated within delta seconds | |
225 | * \retval 0 otherwise | |
829a9357 | 226 | * |
227 | * note: request maybe null (e.g. for cache digests build) | |
e4e6a8db | 228 | */ |
829a9357 | 229 | static int |
190154cf | 230 | refreshCheck(const StoreEntry * entry, HttpRequest * request, time_t delta) |
e4e6a8db | 231 | { |
6018f0de | 232 | const refresh_t *R; |
829a9357 | 233 | const char *uri = NULL; |
65fa5c61 | 234 | time_t age = 0; |
a207429f | 235 | time_t check_time = squid_curtime + delta; |
65fa5c61 | 236 | int staleness; |
237 | stale_flags sf; | |
62e76326 | 238 | |
9b5d1d21 | 239 | if (entry->mem_obj) |
62e76326 | 240 | uri = entry->mem_obj->url; |
7d47d8e6 | 241 | else if (request) |
62e76326 | 242 | uri = urlCanonical(request); |
7d47d8e6 | 243 | |
bf8fe701 | 244 | debugs(22, 3, "refreshCheck: '" << (uri ? uri : "<none>") << "'"); |
65fa5c61 | 245 | |
246 | if (check_time > entry->timestamp) | |
62e76326 | 247 | age = check_time - entry->timestamp; |
248 | ||
efd62b86 | 249 | // FIXME: what to do when age < 0 or counter overflow? |
b2f01ec3 | 250 | assert(age >= 0); |
efd62b86 | 251 | |
65fa5c61 | 252 | R = uri ? refreshLimits(uri) : refreshUncompiledPattern("."); |
62e76326 | 253 | |
65fa5c61 | 254 | if (NULL == R) |
62e76326 | 255 | R = &DefaultRefresh; |
256 | ||
65fa5c61 | 257 | memset(&sf, '\0', sizeof(sf)); |
62e76326 | 258 | |
65fa5c61 | 259 | staleness = refreshStaleness(entry, check_time, age, R, &sf); |
62e76326 | 260 | |
bf8fe701 | 261 | debugs(22, 3, "Staleness = " << staleness); |
262 | ||
263 | debugs(22, 3, "refreshCheck: Matched '" << R->pattern << " " << | |
264 | (int) R->min << " " << (int) (100.0 * R->pct) << "%% " << | |
265 | (int) R->max << "'"); | |
65fa5c61 | 266 | |
62e76326 | 267 | |
4a7a3d56 | 268 | debugs(22, 3, "refreshCheck: age = " << age); |
62e76326 | 269 | |
bf8fe701 | 270 | debugs(22, 3, "\tcheck_time:\t" << mkrfc1123(check_time)); |
62e76326 | 271 | |
bf8fe701 | 272 | debugs(22, 3, "\tentry->timestamp:\t" << mkrfc1123(entry->timestamp)); |
65fa5c61 | 273 | |
4ca08219 AJ |
274 | if (EBIT_TEST(entry->flags, ENTRY_REVALIDATE) && staleness > -1 |
275 | #if HTTP_VIOLATIONS | |
276 | && !R->flags.ignore_must_revalidate | |
277 | #endif | |
278 | ) { | |
bf8fe701 | 279 | debugs(22, 3, "refreshCheck: YES: Must revalidate stale response"); |
62e76326 | 280 | return STALE_MUST_REVALIDATE; |
65fa5c61 | 281 | } |
62e76326 | 282 | |
829a9357 | 283 | /* request-specific checks */ |
284 | if (request) { | |
62e76326 | 285 | HttpHdrCc *cc = request->cache_control; |
4c3ef9b2 | 286 | |
287 | if (request->flags.ims && (R->flags.refresh_ims || Config.onoff.refresh_all_ims)) { | |
288 | /* The clients no-cache header is changed into a IMS query */ | |
bf8fe701 | 289 | debugs(22, 3, "refreshCheck: YES: refresh-ims"); |
4c3ef9b2 | 290 | return STALE_FORCED_RELOAD; |
291 | } | |
292 | ||
9f60cfdf | 293 | #if HTTP_VIOLATIONS |
62e76326 | 294 | |
295 | if (!request->flags.nocache_hack) { | |
296 | (void) 0; | |
297 | } else if (R->flags.ignore_reload) { | |
298 | /* The clients no-cache header is ignored */ | |
bf8fe701 | 299 | debugs(22, 3, "refreshCheck: MAYBE: ignore-reload"); |
62e76326 | 300 | } else if (R->flags.reload_into_ims || Config.onoff.reload_into_ims) { |
301 | /* The clients no-cache header is changed into a IMS query */ | |
bf8fe701 | 302 | debugs(22, 3, "refreshCheck: YES: reload-into-ims"); |
62e76326 | 303 | return STALE_RELOAD_INTO_IMS; |
304 | } else { | |
305 | /* The clients no-cache header is not overridden on this request */ | |
bf8fe701 | 306 | debugs(22, 3, "refreshCheck: YES: client reload"); |
62e76326 | 307 | request->flags.nocache = 1; |
308 | return STALE_FORCED_RELOAD; | |
309 | } | |
310 | ||
9f60cfdf | 311 | #endif |
62e76326 | 312 | if (NULL != cc) { |
313 | if (cc->max_age > -1) { | |
085008f9 | 314 | #if HTTP_VIOLATIONS |
62e76326 | 315 | if (R->flags.ignore_reload && cc->max_age == 0) {} else |
528b2c61 | 316 | #endif |
62e76326 | 317 | { |
528b2c61 | 318 | #if 0 |
62e76326 | 319 | |
320 | if (cc->max_age == 0) { | |
bf8fe701 | 321 | debugs(22, 3, "refreshCheck: YES: client-max-age = 0"); |
62e76326 | 322 | return STALE_EXCEEDS_REQUEST_MAX_AGE_VALUE; |
323 | } | |
324 | ||
085008f9 | 325 | #endif |
62e76326 | 326 | if (age > cc->max_age) { |
bf8fe701 | 327 | debugs(22, 3, "refreshCheck: YES: age > client-max-age"); |
62e76326 | 328 | return STALE_EXCEEDS_REQUEST_MAX_AGE_VALUE; |
329 | } | |
330 | } | |
331 | } | |
332 | ||
333 | if (EBIT_TEST(cc->mask, CC_MAX_STALE) && staleness > -1) { | |
334 | if (cc->max_stale < 0) { | |
335 | /* max-stale directive without a value */ | |
bf8fe701 | 336 | debugs(22, 3, "refreshCheck: NO: max-stale wildcard"); |
62e76326 | 337 | return FRESH_REQUEST_MAX_STALE_ALL; |
338 | } else if (staleness < cc->max_stale) { | |
bf8fe701 | 339 | debugs(22, 3, "refreshCheck: NO: staleness < max-stale"); |
62e76326 | 340 | return FRESH_REQUEST_MAX_STALE_VALUE; |
341 | } | |
342 | } | |
343 | } | |
48f44632 | 344 | } |
62e76326 | 345 | |
65fa5c61 | 346 | if (-1 == staleness) { |
bf8fe701 | 347 | debugs(22, 3, "refreshCheck: object isn't stale.."); |
ed1de692 | 348 | if (sf.expires) { |
bf8fe701 | 349 | debugs(22, 3, "refreshCheck: returning FRESH_EXPIRES"); |
62e76326 | 350 | return FRESH_EXPIRES; |
26ac0430 | 351 | } |
62e76326 | 352 | |
353 | assert(!sf.max); | |
354 | ||
ed1de692 | 355 | if (sf.lmfactor) { |
bf8fe701 | 356 | debugs(22, 3, "refreshCheck: returning FRESH_LMFACTOR_RULE"); |
62e76326 | 357 | return FRESH_LMFACTOR_RULE; |
26ac0430 | 358 | } |
62e76326 | 359 | |
360 | assert(sf.min); | |
361 | ||
bf8fe701 | 362 | debugs(22, 3, "refreshCheck: returning FRESH_MIN_RULE"); |
62e76326 | 363 | return FRESH_MIN_RULE; |
1dfa1d81 | 364 | } |
62e76326 | 365 | |
65fa5c61 | 366 | /* |
367 | * At this point the response is stale, unless one of | |
542c4d60 | 368 | * the override options kicks in. |
65fa5c61 | 369 | */ |
370 | if (sf.expires) { | |
371 | #if HTTP_VIOLATIONS | |
62e76326 | 372 | |
373 | if (R->flags.override_expire && age < R->min) { | |
bf8fe701 | 374 | debugs(22, 3, "refreshCheck: NO: age < min && override-expire"); |
62e76326 | 375 | return FRESH_OVERRIDE_EXPIRES; |
376 | } | |
377 | ||
65fa5c61 | 378 | #endif |
62e76326 | 379 | return STALE_EXPIRES; |
e4e6a8db | 380 | } |
62e76326 | 381 | |
65fa5c61 | 382 | if (sf.max) |
62e76326 | 383 | return STALE_MAX_RULE; |
384 | ||
65fa5c61 | 385 | if (sf.lmfactor) { |
9f60cfdf | 386 | #if HTTP_VIOLATIONS |
62e76326 | 387 | |
388 | if (R->flags.override_lastmod && age < R->min) { | |
bf8fe701 | 389 | debugs(22, 3, "refreshCheck: NO: age < min && override-lastmod"); |
62e76326 | 390 | return FRESH_OVERRIDE_LASTMOD; |
391 | } | |
392 | ||
65fa5c61 | 393 | #endif |
62e76326 | 394 | return STALE_LMFACTOR_RULE; |
e4e6a8db | 395 | } |
62e76326 | 396 | |
bf8fe701 | 397 | debugs(22, 3, "refreshCheck: returning STALE_DEFAULT"); |
65fa5c61 | 398 | return STALE_DEFAULT; |
e4e6a8db | 399 | } |
48f44632 | 400 | |
cfa9f1cb | 401 | int |
402 | refreshIsCachable(const StoreEntry * entry) | |
403 | { | |
404 | /* | |
405 | * Don't look at the request to avoid no-cache and other nuisances. | |
406 | * the object should have a mem_obj so the URL will be found there. | |
26ac0430 AJ |
407 | * minimum_expiry_time seconds delta (defaults to 60 seconds), to |
408 | * avoid objects which expire almost immediately, and which can't | |
6a2f3fcf | 409 | * be refreshed. |
cfa9f1cb | 410 | */ |
6a2f3fcf | 411 | int reason = refreshCheck(entry, NULL, Config.minimum_expiry_time); |
65fa5c61 | 412 | refreshCounts[rcStore].total++; |
413 | refreshCounts[rcStore].status[reason]++; | |
62e76326 | 414 | |
451c8350 | 415 | if (reason < STALE_MUST_REVALIDATE) |
62e76326 | 416 | /* Does not need refresh. This is certainly cachable */ |
417 | return 1; | |
418 | ||
cfa9f1cb | 419 | if (entry->lastmod < 0) |
62e76326 | 420 | /* Last modified is needed to do a refresh */ |
421 | return 0; | |
422 | ||
cfa9f1cb | 423 | if (entry->mem_obj == NULL) |
62e76326 | 424 | /* no mem_obj? */ |
425 | return 1; | |
426 | ||
528b2c61 | 427 | if (entry->getReply() == NULL) |
62e76326 | 428 | /* no reply? */ |
429 | return 1; | |
430 | ||
528b2c61 | 431 | if (entry->getReply()->content_length == 0) |
62e76326 | 432 | /* No use refreshing (caching?) 0 byte objects */ |
433 | return 0; | |
434 | ||
cfa9f1cb | 435 | /* This seems to be refreshable. Cache it */ |
436 | return 1; | |
437 | } | |
438 | ||
829a9357 | 439 | /* refreshCheck... functions below are protocol-specific wrappers around |
440 | * refreshCheck() function above */ | |
441 | ||
442 | int | |
190154cf | 443 | refreshCheckHTTP(const StoreEntry * entry, HttpRequest * request) |
7d47d8e6 | 444 | { |
65fa5c61 | 445 | int reason = refreshCheck(entry, request, 0); |
446 | refreshCounts[rcHTTP].total++; | |
447 | refreshCounts[rcHTTP].status[reason]++; | |
448 | return (reason < 200) ? 0 : 1; | |
829a9357 | 449 | } |
450 | ||
451 | int | |
190154cf | 452 | refreshCheckICP(const StoreEntry * entry, HttpRequest * request) |
7d47d8e6 | 453 | { |
65fa5c61 | 454 | int reason = refreshCheck(entry, request, 30); |
455 | refreshCounts[rcICP].total++; | |
456 | refreshCounts[rcICP].status[reason]++; | |
457 | return (reason < 200) ? 0 : 1; | |
829a9357 | 458 | } |
459 | ||
65fa5c61 | 460 | #if USE_HTCP |
32b3cf93 | 461 | int |
190154cf | 462 | refreshCheckHTCP(const StoreEntry * entry, HttpRequest * request) |
32b3cf93 | 463 | { |
65fa5c61 | 464 | int reason = refreshCheck(entry, request, 10); |
465 | refreshCounts[rcHTCP].total++; | |
466 | refreshCounts[rcHTCP].status[reason]++; | |
467 | return (reason < 200) ? 0 : 1; | |
32b3cf93 | 468 | } |
62e76326 | 469 | |
65fa5c61 | 470 | #endif |
32b3cf93 | 471 | |
65fa5c61 | 472 | #if USE_CACHE_DIGESTS |
829a9357 | 473 | int |
7d47d8e6 | 474 | refreshCheckDigest(const StoreEntry * entry, time_t delta) |
475 | { | |
65fa5c61 | 476 | int reason = refreshCheck(entry, |
62e76326 | 477 | entry->mem_obj ? entry->mem_obj->request : NULL, |
478 | delta); | |
65fa5c61 | 479 | refreshCounts[rcCDigest].total++; |
480 | refreshCounts[rcCDigest].status[reason]++; | |
481 | return (reason < 200) ? 0 : 1; | |
6018f0de | 482 | } |
62e76326 | 483 | |
65fa5c61 | 484 | #endif |
6018f0de | 485 | |
48f44632 | 486 | time_t |
487 | getMaxAge(const char *url) | |
488 | { | |
6018f0de | 489 | const refresh_t *R; |
bf8fe701 | 490 | debugs(22, 3, "getMaxAge: '" << url << "'"); |
62e76326 | 491 | |
6018f0de | 492 | if ((R = refreshLimits(url))) |
62e76326 | 493 | return R->max; |
6018f0de | 494 | else |
62e76326 | 495 | return REFRESH_DEFAULT_MAX; |
48f44632 | 496 | } |
1c3e77cd | 497 | |
829a9357 | 498 | static void |
62e76326 | 499 | |
829a9357 | 500 | refreshCountsStats(StoreEntry * sentry, struct RefreshCounts *rc) |
501 | { | |
cc7cfa8e | 502 | int sum = 0; |
503 | int tot = rc->total; | |
504 | ||
829a9357 | 505 | storeAppendPrintf(sentry, "\n\n%s histogram:\n", rc->proto); |
65fa5c61 | 506 | storeAppendPrintf(sentry, "Count\t%%Total\tCategory\n"); |
829a9357 | 507 | |
65fa5c61 | 508 | #define refreshCountsStatsEntry(code,desc) { \ |
509 | storeAppendPrintf(sentry, "%6d\t%6.2f\t%s\n", \ | |
510 | rc->status[code], xpercent(rc->status[code], tot), desc); \ | |
511 | sum += rc->status[code]; \ | |
cc7cfa8e | 512 | } |
65fa5c61 | 513 | |
514 | refreshCountsStatsEntry(FRESH_REQUEST_MAX_STALE_ALL, | |
62e76326 | 515 | "Fresh: request max-stale wildcard"); |
65fa5c61 | 516 | refreshCountsStatsEntry(FRESH_REQUEST_MAX_STALE_VALUE, |
62e76326 | 517 | "Fresh: request max-stale value"); |
65fa5c61 | 518 | refreshCountsStatsEntry(FRESH_EXPIRES, |
62e76326 | 519 | "Fresh: expires time not reached"); |
65fa5c61 | 520 | refreshCountsStatsEntry(FRESH_LMFACTOR_RULE, |
62e76326 | 521 | "Fresh: refresh_pattern last-mod factor percentage"); |
65fa5c61 | 522 | refreshCountsStatsEntry(FRESH_MIN_RULE, |
62e76326 | 523 | "Fresh: refresh_pattern min value"); |
65fa5c61 | 524 | refreshCountsStatsEntry(FRESH_OVERRIDE_EXPIRES, |
62e76326 | 525 | "Fresh: refresh_pattern override expires"); |
65fa5c61 | 526 | refreshCountsStatsEntry(FRESH_OVERRIDE_LASTMOD, |
62e76326 | 527 | "Fresh: refresh_pattern override lastmod"); |
65fa5c61 | 528 | refreshCountsStatsEntry(STALE_MUST_REVALIDATE, |
62e76326 | 529 | "Stale: response has must-revalidate"); |
65fa5c61 | 530 | refreshCountsStatsEntry(STALE_RELOAD_INTO_IMS, |
62e76326 | 531 | "Stale: changed reload into IMS"); |
65fa5c61 | 532 | refreshCountsStatsEntry(STALE_FORCED_RELOAD, |
62e76326 | 533 | "Stale: request has no-cache directive"); |
65fa5c61 | 534 | refreshCountsStatsEntry(STALE_EXCEEDS_REQUEST_MAX_AGE_VALUE, |
62e76326 | 535 | "Stale: age exceeds request max-age value"); |
65fa5c61 | 536 | refreshCountsStatsEntry(STALE_EXPIRES, |
62e76326 | 537 | "Stale: expires time reached"); |
65fa5c61 | 538 | refreshCountsStatsEntry(STALE_MAX_RULE, |
62e76326 | 539 | "Stale: refresh_pattern max age rule"); |
65fa5c61 | 540 | refreshCountsStatsEntry(STALE_LMFACTOR_RULE, |
62e76326 | 541 | "Stale: refresh_pattern last-mod factor percentage"); |
65fa5c61 | 542 | refreshCountsStatsEntry(STALE_DEFAULT, |
62e76326 | 543 | "Stale: by default"); |
65fa5c61 | 544 | |
7d47d8e6 | 545 | tot = sum; /* paranoid: "total" line shows 100% if we forgot nothing */ |
65fa5c61 | 546 | storeAppendPrintf(sentry, "%6d\t%6.2f\tTOTAL\n", |
62e76326 | 547 | rc->total, xpercent(rc->total, tot)); |
65fa5c61 | 548 | \ |
62e76326 | 549 | storeAppendPrintf(sentry, "\n"); |
829a9357 | 550 | } |
551 | ||
1c3e77cd | 552 | static void |
553 | refreshStats(StoreEntry * sentry) | |
554 | { | |
829a9357 | 555 | int i; |
556 | int total = 0; | |
557 | ||
558 | /* get total usage count */ | |
62e76326 | 559 | |
829a9357 | 560 | for (i = 0; i < rcCount; ++i) |
62e76326 | 561 | total += refreshCounts[i].total; |
829a9357 | 562 | |
563 | /* protocol usage histogram */ | |
564 | storeAppendPrintf(sentry, "\nRefreshCheck calls per protocol\n\n"); | |
62e76326 | 565 | |
829a9357 | 566 | storeAppendPrintf(sentry, "Protocol\t#Calls\t%%Calls\n"); |
62e76326 | 567 | |
829a9357 | 568 | for (i = 0; i < rcCount; ++i) |
62e76326 | 569 | storeAppendPrintf(sentry, "%10s\t%6d\t%6.2f\n", |
570 | refreshCounts[i].proto, | |
571 | refreshCounts[i].total, | |
572 | xpercent(refreshCounts[i].total, total)); | |
829a9357 | 573 | |
574 | /* per protocol histograms */ | |
575 | storeAppendPrintf(sentry, "\n\nRefreshCheck histograms for various protocols\n"); | |
62e76326 | 576 | |
829a9357 | 577 | for (i = 0; i < rcCount; ++i) |
62e76326 | 578 | refreshCountsStats(sentry, &refreshCounts[i]); |
1c3e77cd | 579 | } |
580 | ||
5f5e883f FC |
581 | static void |
582 | refreshRegisterWithCacheManager(void) | |
583 | { | |
584 | CacheManager::GetInstance()-> | |
26ac0430 | 585 | registerAction("refresh", "Refresh Algorithm Statistics", refreshStats, 0, 1); |
5f5e883f FC |
586 | } |
587 | ||
1c3e77cd | 588 | void |
9bc73deb | 589 | refreshInit(void) |
1c3e77cd | 590 | { |
829a9357 | 591 | memset(refreshCounts, 0, sizeof(refreshCounts)); |
592 | refreshCounts[rcHTTP].proto = "HTTP"; | |
593 | refreshCounts[rcICP].proto = "ICP"; | |
65fa5c61 | 594 | #if USE_HTCP |
62e76326 | 595 | |
32b3cf93 | 596 | refreshCounts[rcHTCP].proto = "HTCP"; |
65fa5c61 | 597 | #endif |
62e76326 | 598 | |
cfa9f1cb | 599 | refreshCounts[rcStore].proto = "On Store"; |
65fa5c61 | 600 | #if USE_CACHE_DIGESTS |
62e76326 | 601 | |
829a9357 | 602 | refreshCounts[rcCDigest].proto = "Cache Digests"; |
65fa5c61 | 603 | #endif |
62e76326 | 604 | |
65fa5c61 | 605 | memset(&DefaultRefresh, '\0', sizeof(DefaultRefresh)); |
606 | DefaultRefresh.pattern = "<none>"; | |
607 | DefaultRefresh.min = REFRESH_DEFAULT_MIN; | |
608 | DefaultRefresh.pct = REFRESH_DEFAULT_PCT; | |
609 | DefaultRefresh.max = REFRESH_DEFAULT_MAX; | |
d120ed12 FC |
610 | |
611 | refreshRegisterWithCacheManager(); | |
1c3e77cd | 612 | } |