Annotation of libwww/Library/src/HTFilter.c, revision 2.18
2.1 frystyk 1: /*
2: ** BEFORE AND AFTER FILTERS
3: **
4: ** (c) COPYRIGHT MIT 1995.
5: ** Please first read the full copyright statement in the file COPYRIGH.
2.18 ! eric 6: ** @(#) $Id: HTFilter.c,v 2.17 1997/01/29 16:54:49 frystyk Exp $
2.1 frystyk 7: **
8: ** This module implrments a set of default filters that can be registerd
9: ** as BEFORE and AFTER filters to the Net manager
10: ** Authors
11: ** HFN Henrik Frystyk, frystyk@w.org
12: ** History
13: ** Jul 4, 96 Written
14: */
15:
16: /* Library include files */
17: #include "WWWLib.h"
18: #include "WWWCache.h"
19: #include "WWWHTTP.h"
20: #include "HTLog.h"
21: #include "HTAccess.h"
2.10 frystyk 22: #include "HTProxy.h"
23: #include "HTRules.h"
2.1 frystyk 24: #include "HTFilter.h" /* Implemented here */
25:
26: /* ------------------------------------------------------------------------- */
27:
28: /*
29: ** Proxy and Gateway BEFORE filter
30: ** -------------------------------
31: ** Checks for registerd proxy servers or gateways and sees whether this
32: ** request should be redirected to a proxy or a gateway. Proxies have
33: ** higher priority than gateways so we look for them first!
34: ** For HTTP/1.0 and HTTP/1.1 we may only send a full URL (including the
35: ** host portion) to proxy servers. Therefore, we tell the Library whether
36: ** to use the full URL or the traditional HTTP one without the host part.
37: */
2.15 frystyk 38: PUBLIC int HTProxyFilter (HTRequest * request, void * param, int mode)
2.1 frystyk 39: {
40: HTParentAnchor * anchor = HTRequest_anchor(request);
2.2 frystyk 41: char * addr = HTAnchor_physical(anchor);
2.1 frystyk 42: char * physical = NULL;
43: if ((physical = HTProxy_find(addr))) {
2.6 frystyk 44: HTRequest_setFullURI(request, YES); /* For now */
2.5 frystyk 45: HTRequest_setProxy(request, physical);
2.8 frystyk 46: HT_FREE(physical);
2.6 frystyk 47: #if 0
48: /* Don't paste the URLs together anymore */
2.1 frystyk 49: StrAllocCat(physical, addr);
2.5 frystyk 50: HTAnchor_setPhysical(anchor, physical);
2.6 frystyk 51: #endif
2.1 frystyk 52: } else if ((physical = HTGateway_find(addr))) {
53: /*
54: ** A gateway URL is crated by chopping off any leading "/" to make the
55: ** host into part of path
56: */
57: char * path =
58: HTParse(addr, "", PARSE_HOST + PARSE_PATH + PARSE_PUNCTUATION);
59: char * gatewayed = HTParse(path+1, physical, PARSE_ALL);
60: HTAnchor_setPhysical(anchor, gatewayed);
61: HT_FREE(path);
62: HT_FREE(gatewayed);
63: HTRequest_setFullURI(request, NO);
2.6 frystyk 64: HTRequest_deleteProxy(request);
2.1 frystyk 65: } else {
2.6 frystyk 66: HTRequest_setFullURI(request, NO); /* For now */
67: HTRequest_deleteProxy(request);
2.1 frystyk 68: }
69: return HT_OK;
70: }
71:
72: /*
73: ** Rule Translation BEFORE Filter
74: ** ------------------------------
75: ** If we have a set of rules loaded (see the Rule manager) then check
76: ** before each request whether how that should be translated. The trick
77: ** is that a parent anchor has a "address" which is the part from the URL
78: ** we used when we created the anchor. However, it also have a "physical
79: ** address" which is the place we are actually going to look for the
2.2 frystyk 80: ** resource. Hence this filter translates the physical address
81: ** (if any translations are found)
2.1 frystyk 82: */
2.15 frystyk 83: PUBLIC int HTRuleFilter (HTRequest * request, void * param, int mode)
2.1 frystyk 84: {
85: HTList * list = HTRule_global();
86: HTParentAnchor * anchor = HTRequest_anchor(request);
2.2 frystyk 87: char * addr = HTAnchor_physical(anchor);
2.1 frystyk 88: char * physical = HTRule_translate(list, addr, NO);
89: if (!physical) {
90: HTRequest_addError(request, ERR_FATAL, NO, HTERR_FORBIDDEN,
91: NULL, 0, "HTRuleFilter");
92: return HT_ERROR;
93: }
94: HTAnchor_setPhysical(anchor, physical);
95: HT_FREE(physical);
96: return HT_OK;
97: }
98:
99: /*
100: ** Cache Validation BEFORE Filter
101: ** ------------------------------
102: ** Check the cache mode to see if we can use an already loaded version
103: ** of this document. If so and our copy is valid then we don't have
104: ** to go out and get it unless we are forced to
2.3 frystyk 105: ** We only check the cache in caseof a GET request. Otherwise, we go
106: ** directly to the source.
2.1 frystyk 107: */
2.15 frystyk 108: PUBLIC int HTCacheFilter (HTRequest * request, void * param, int mode)
2.1 frystyk 109: {
110: HTParentAnchor * anchor = HTRequest_anchor(request);
2.12 frystyk 111: HTCache * cache = NULL;
2.15 frystyk 112: HTReload reload = HTRequest_reloadMode(request);
2.3 frystyk 113: HTMethod method = HTRequest_method(request);
2.12 frystyk 114: HTDisconnectedMode disconnect = HTCacheMode_disconnected();
115: BOOL validate = NO;
2.3 frystyk 116:
117: /*
2.12 frystyk 118: ** If the cache is disabled all together then it won't help looking, huh?
2.3 frystyk 119: */
2.12 frystyk 120: if (!HTCacheMode_enabled()) return HT_OK;
121: if (CACHE_TRACE) HTTrace("Cachefilter. Checking persistent cache\n");
2.3 frystyk 122:
2.1 frystyk 123: /*
2.12 frystyk 124: ** Now check the cache...
2.1 frystyk 125: */
2.12 frystyk 126: if (method != METHOD_GET) {
127: if (CACHE_TRACE) HTTrace("Cachefilter. We only check GET methods\n");
2.15 frystyk 128: } else if (reload == HT_CACHE_FLUSH) {
2.12 frystyk 129: /*
130: ** If the mode if "Force Reload" then don't even bother to check the
131: ** cache - we flush everything we know abut this document anyway.
2.1 frystyk 132: ** Add the appropriate request headers. We use both the "pragma"
133: ** and the "cache-control" headers in order to be
2.12 frystyk 134: ** backwards compatible with HTTP/1.0
2.1 frystyk 135: */
2.12 frystyk 136: validate = YES;
2.1 frystyk 137: HTRequest_addGnHd(request, HT_G_PRAGMA_NO_CACHE);
2.11 frystyk 138: HTRequest_addCacheControl(request, "no-cache", "");
2.1 frystyk 139:
140: /*
2.15 frystyk 141: ** We also flush the information in the anchor as we don't want to
142: ** inherit any "old" values
2.1 frystyk 143: */
144: HTAnchor_clearHeader(anchor);
145:
2.12 frystyk 146: } else {
147: /*
148: ** Check the persistent cache manager. If we have a cache hit then
149: ** continue to see if the reload mode requires us to do a validation
150: ** check. This filter assumes that we can get the cached version
151: ** through one of our protocol modules (for example the file module)
152: */
153: cache = HTCache_find(anchor);
2.1 frystyk 154: if (cache) {
2.15 frystyk 155: reload = HTMAX(reload, HTCache_isFresh(cache, request));
156: HTRequest_setReloadMode(request, reload);
2.12 frystyk 157:
158: /*
159: ** Now check the mode and add the right headers for the validation
160: ** If we are to validate a cache entry then we get a lock
161: ** on it so that not other requests can steal it.
162: */
2.15 frystyk 163: if (reload == HT_CACHE_RANGE_VALIDATE) {
164: /*
165: ** If we were asked to range validate the cached object then
166: ** use the etag or the last modified for cache validation
167: */
168: validate = YES;
169: HTCache_getLock(cache, request);
170: HTRequest_addRqHd(request, HT_C_IF_RANGE);
171: } else if (reload == HT_CACHE_END_VALIDATE) {
2.12 frystyk 172: /*
173: ** If we were asked to end-to-end validate the cached object
174: ** then use a max-age=0 cache control directive
175: */
176: validate = YES;
177: HTCache_getLock(cache, request);
178: HTRequest_addCacheControl(request, "max-age", "0");
2.15 frystyk 179: } else if (reload == HT_CACHE_VALIDATE) {
2.11 frystyk 180: /*
2.12 frystyk 181: ** If we were asked to validate the cached object then
2.11 frystyk 182: ** use the etag or the last modified for cache validation
2.15 frystyk 183: ** We use both If-None-Match or If-Modified-Since.
2.11 frystyk 184: */
2.12 frystyk 185: validate = YES;
186: HTCache_getLock(cache, request);
2.11 frystyk 187: HTRequest_addRqHd(request, HT_C_IF_NONE_MATCH | HT_C_IMS);
2.12 frystyk 188: } else {
189: /*
190: ** The entity does not require any validation at all. We
2.15 frystyk 191: ** can just go ahead and get it from the cache. In case we
192: ** have a fresh subpart of the entity, then we issue a
193: ** conditional GET request with the range set by the cache
194: ** manager. Issuing the conditional range request is
195: ** equivalent to a validation as we have to go out on the
196: ** net. This may have an effect if running in disconnected
197: ** mode. We disable all BEFORE filters as they don't make
198: ** sense while loading the cache entry.
2.12 frystyk 199: */
2.15 frystyk 200: {
201: char * name = HTCache_name(cache);
202: HTAnchor_setPhysical(anchor, name);
203: HTCache_addHit(cache);
204: HT_FREE(name);
205: }
2.11 frystyk 206: }
207: }
2.12 frystyk 208: }
209:
210: /*
211: ** If we are in disconnected mode and we are to validate an entry
212: ** then check whether what mode of disconnected mode we're in. If
213: ** we are to use our own cache then return a "504 Gateway Timeout"
214: */
215: if ((!cache || validate) && disconnect != HT_DISCONNECT_NONE) {
216: if (disconnect == HT_DISCONNECT_EXTERNAL)
217: HTRequest_addCacheControl(request, "only-if-cached", "");
218: else {
219: HTRequest_addError(request, ERR_FATAL, NO,
220: HTERR_GATE_TIMEOUT, "Disconnected Cache Mode",
221: 0, "HTCacheFilter");
222: return HT_ERROR;
223: }
2.11 frystyk 224: }
225: return HT_OK;
226: }
227:
228: /*
2.16 frystyk 229: ** A small BEFORE filter that just finds a cache entry unconditionally
230: ** and loads the entry. All freshness and any other constraints are
231: ** ignored.
232: */
233: PUBLIC int HTCacheLoadFilter (HTRequest * request, void * param, int mode)
234: {
235: HTParentAnchor * anchor = HTRequest_anchor(request);
236: HTCache * cache = HTCache_find(anchor);
237: if (cache) {
238: char * name = HTCache_name(cache);
239: HTAnchor_setPhysical(anchor, name);
240: HTCache_addHit(cache);
241: HT_FREE(name);
242:
243: /*
244: ** Start request directly from the cache. As with the redirection
245: ** filter we reuse the same request object which means that we must
246: ** keep this around until the cache load request has terminated
247: ** In the case of a
248: */
249: {
250: HTLoad(request, NO);
251: return HT_ERROR;
252: }
253: }
254: return HT_OK;
255: }
256:
257: /*
2.15 frystyk 258: ** Check the Memory Cache (History list) BEFORE filter
259: ** ---------------------------------------------------
2.11 frystyk 260: ** Check if document is already loaded. The user can define whether
261: ** the history list should follow normal expiration or work as a
262: ** traditional history list where expired documents are not updated.
263: ** We don't check for anything but existence proof of a document
264: ** associated with the anchor as the definition is left to the application
265: */
2.15 frystyk 266: PUBLIC int HTMemoryCacheFilter (HTRequest * request, void * param, int mode)
2.11 frystyk 267: {
268: HTReload validation = HTRequest_reloadMode(request);
269: HTParentAnchor * anchor = HTRequest_anchor(request);
270: void * document = HTAnchor_document(anchor);
2.1 frystyk 271:
2.11 frystyk 272: /*
2.14 frystyk 273: ** We only check the memory cache if it's a GET method
274: */
275: if (HTRequest_method(request) != METHOD_GET) {
276: if (CACHE_TRACE) HTTrace("Mem Cache... We only check GET methods\n");
277: return HT_OK;
278: }
279:
280: /*
2.11 frystyk 281: ** If we are asked to flush the persistent cache then there is no reason
282: ** to do anything here - we're flushing it anyway. Also if no document
283: ** then just exit from this filter.
284: */
285: if (!document || validation > HT_CACHE_FLUSH_MEM) {
286: if (CACHE_TRACE) HTTrace("Mem Cache... No fresh document...\n");
287: return HT_OK;
288: }
2.1 frystyk 289:
2.11 frystyk 290: /*
291: ** If we have a document object associated with this anchor then we also
292: ** have the object in the history list. Depending on what the user asked,
293: ** we can add a cache validator
294: */
2.14 frystyk 295: #if 0
2.11 frystyk 296: if (document) {
297: if (validation != HT_CACHE_FLUSH_MEM) {
2.14 frystyk 298: HTExpiresMode expires = HTCacheMode_expires();
2.11 frystyk 299: if (CACHE_TRACE)
300: HTTrace("Mem Cache... Document already in memory\n");
301: if (expires != HT_EXPIRES_IGNORE) {
302:
303: /*
304: ** Ask the cache manager if this object has expired. Also
305: ** check if we should care about expiration or not.
306: */
307: if (!HTCache_isValid(anchor)) {
308: if (expires == HT_EXPIRES_NOTIFY) {
309:
310: /*
311: ** See if we have a function registered for outputting errors.
312: ** If so then call it and present the message to the user
313: */
314: HTAlertCallback * cbf = HTAlert_find(HT_A_MESSAGE);
315: if (cbf)
316: (*cbf)(request, HT_A_MESSAGE, HTERR_CACHE_EXPIRED,
317: NULL, HTRequest_error(request), NULL);
318: } else {
319: if (CACHE_TRACE) HTTrace("Mem Cache... Expired - autoreload\n");
320: HTRequest_addRqHd(request, HT_C_IF_NONE_MATCH | HT_C_IMS);
321: return HT_OK; /* Must go get it */
322: }
323: }
2.1 frystyk 324: }
325: }
2.14 frystyk 326: return HT_LOADED; /* Got it! */
327: }
328: return HT_OK;
329: #endif
330: if (document && validation != HT_CACHE_FLUSH_MEM) {
331: if (CACHE_TRACE) HTTrace("Mem Cache... Document already in memory\n");
332: return HT_LOADED;
2.1 frystyk 333: }
334: return HT_OK;
335: }
336:
337: /*
2.15 frystyk 338: ** Cache Update AFTER filter
339: ** -------------------------
340: ** On our way out we catch the metainformation and stores it in
341: ** our persistent store. If we have a cache validation (a 304
342: ** response then we use the new metainformation and merges it with
343: ** the existing information already captured in the cache.
344: */
345: PUBLIC int HTCacheUpdateFilter (HTRequest * request, HTResponse * response,
346: void * param, int status)
347: {
348: HTParentAnchor * anchor = HTRequest_anchor(request);
349: HTCache * cache = HTCache_find(anchor);
2.17 frystyk 350: if (cache) {
2.15 frystyk 351:
2.17 frystyk 352: /*
353: ** It may in fact be that the information in the 304 response
354: ** told us that we can't cache the entity anymore. If this is the
355: ** case then flush it now. Otherwise prepare for a cache read
356: */
357: if (CACHE_TRACE) HTTrace("Cache....... Merging metainformation\n");
358: if (HTResponse_isCachable(response) == NO) {
359: HTCache_remove(cache);
360: } else {
361: char * name = HTCache_name(cache);
362: HTAnchor_setPhysical(anchor, name);
363: HTCache_addHit(cache);
364: HT_FREE(name);
365: HTCache_updateMeta(cache, request, response);
366: }
2.15 frystyk 367:
2.17 frystyk 368: /*
369: ** Start request directly from the cache. As with the redirection filter
370: ** we reuse the same request object which means that we must
371: ** keep this around until the cache load request has terminated
372: ** In the case of a
373: */
2.18 ! eric 374: #if 0 /* FIX ME!!! */
2.17 frystyk 375: {
376: static BOOL done = NO;
377: if (!done) {
378: HTLoad(request, YES);
379: done = YES;
380: return HT_ERROR;
381: }
382: }
383: #else
384: HTLoad(request, YES);
2.15 frystyk 385: return HT_ERROR;
2.17 frystyk 386: #endif
2.15 frystyk 387: }
2.17 frystyk 388: return HT_OK;
2.15 frystyk 389: }
390:
391: /*
2.1 frystyk 392: ** Error and Information AFTER filter
393: ** ----------------------------------
394: ** It checks the status code from a request and generates an
395: ** error/information message if required.
396: */
2.15 frystyk 397: PUBLIC int HTInfoFilter (HTRequest * request, HTResponse * response,
398: void * param, int status)
2.1 frystyk 399: {
400: HTParentAnchor * anchor = HTRequest_anchor(request);
401: char * uri = HTAnchor_address((HTAnchor*) anchor);
402: switch (status) {
403: case HT_RETRY:
404: if (PROT_TRACE)
405: HTTrace("Load End.... NOT AVAILABLE, RETRY AT %ld\n",
2.15 frystyk 406: HTResponse_retryTime(response));
2.1 frystyk 407: break;
408:
2.7 frystyk 409: case HT_NO_DATA:
410: {
411: /*
412: ** The document was empty
413: */
414: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
415: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
416: HTRequest_error(request), NULL);
417: if (PROT_TRACE)
418: HTTrace("Load End.... EMPTY: No content `%s\'\n",
419: uri ? uri : "<UNKNOWN>");
420: break;
421: }
2.3 frystyk 422:
423: case HT_LOADED:
2.16 frystyk 424: if (PROT_TRACE) HTTrace("Load End.... OK: `%s\'\n", uri);
425: break;
426:
427: default:
2.3 frystyk 428: {
429: /*
2.16 frystyk 430: ** See if we have a function registered for outputting errors.
431: ** If so then call it and present the message to the user
2.3 frystyk 432: */
433: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
434: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
435: HTRequest_error(request), NULL);
2.1 frystyk 436: if (PROT_TRACE)
437: HTTrace("Load End.... Request ended with code %d\n", status);
438: break;
439: }
2.16 frystyk 440: }
2.1 frystyk 441: HT_FREE(uri);
442: return HT_OK;
443: }
444:
445: /*
446: ** Redirection AFTER filter
447: ** ------------------------
448: ** The redirection handler only handles redirections
449: ** on the GET or HEAD method (or any other safe method)
450: */
2.15 frystyk 451: PUBLIC int HTRedirectFilter (HTRequest * request, HTResponse * response,
452: void * param, int status)
2.1 frystyk 453: {
454: HTMethod method = HTRequest_method(request);
2.15 frystyk 455: HTAnchor * new_anchor = HTResponse_redirection(response);
2.7 frystyk 456: if (!new_anchor) {
457: if (PROT_TRACE) HTTrace("Redirection. No destination\n");
458: return HT_OK;
459: }
460:
2.1 frystyk 461: /*
462: ** Only do redirect on GET and HEAD
463: */
2.7 frystyk 464: if (!HTMethod_isSafe(method)) {
2.4 frystyk 465: HTAlertCallback * prompt = HTAlert_find(HT_A_CONFIRM);
466: if (prompt) {
467: if ((*prompt)(request, HT_A_CONFIRM, HT_MSG_REDIRECTION,
468: NULL, NULL, NULL) != YES)
469: return HT_ERROR;
470: }
2.1 frystyk 471: }
472:
473: /*
474: ** Start new request with the redirect anchor found in the headers.
475: ** Note that we reuse the same request object which means that we must
476: ** keep this around until the redirected request has terminated. It also
477: ** allows us in an easy way to keep track of the number of redirections
478: ** so that we can detect endless loops.
479: */
2.4 frystyk 480: if (HTRequest_doRetry(request)) {
2.1 frystyk 481: HTLoadAnchor(new_anchor, request);
2.9 frystyk 482: } else {
483: HTRequest_addError(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
484: NULL, 0, "HTRedirectFilter");
485: }
486:
487: /*
488: ** By returning HT_ERROR we make sure that this is the last handler to be
489: ** called. We do this as we don't want any other filter to delete the
490: ** request object now when we have just started a new one ourselves
491: */
492: return HT_ERROR;
493: }
494:
495: /*
2.15 frystyk 496: ** Retry through Proxy AFTER Filter
497: ** --------------------------------
2.9 frystyk 498: ** This filter handles a 305 Use Proxy response and retries the request
499: ** through the proxy
500: */
2.15 frystyk 501: PUBLIC int HTUseProxyFilter (HTRequest * request, HTResponse * response,
502: void * param, int status)
2.9 frystyk 503: {
2.15 frystyk 504: HTAnchor * proxy_anchor = HTResponse_redirection(response);
2.9 frystyk 505: if (!proxy_anchor) {
506: if (PROT_TRACE) HTTrace("Use Proxy... No proxy location\n");
507: return HT_OK;
508: }
509:
510: /*
511: ** Add the proxy to the list. Assume HTTP access method only!
512: */
513: {
514: char * addr = HTAnchor_address(proxy_anchor);
515: HTProxy_add("http", addr);
516: HT_FREE(addr);
517: }
518:
519: /*
520: ** Start new request through the proxy if we haven't reached the max
521: ** number of redirections for this request
522: */
523: if (HTRequest_doRetry(request)) {
524: HTLoadAnchor(proxy_anchor, request);
2.1 frystyk 525: } else {
526: HTRequest_addError(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
527: NULL, 0, "HTRedirectFilter");
528: }
529:
530: /*
531: ** By returning HT_ERROR we make sure that this is the last handler to be
532: ** called. We do this as we don't want any other filter to delete the
533: ** request object now when we have just started a new one ourselves
534: */
535: return HT_ERROR;
536: }
537:
538: /*
539: ** Client side authentication BEFORE filter
540: ** ----------------------------------------
541: ** The filter generates the credentials required to access a document
542: ** Getting the credentials may involve asking the user
543: */
2.15 frystyk 544: PUBLIC int HTCredentialsFilter (HTRequest * request, void * param, int mode)
2.1 frystyk 545: {
546: /*
547: ** Ask the authentication module to call the right credentials generator
548: ** that understands this scheme
549: */
2.15 frystyk 550: if (HTAA_beforeFilter(request, param, mode) == HT_OK) {
2.1 frystyk 551: if (PROT_TRACE) HTTrace("Credentials. verified\n");
552: return HT_OK;
553: } else {
554: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
555: NULL, 0, "HTCredentialsFilter");
556: return HT_ERROR;
557: }
558: }
559:
560: /*
561: ** Client side authentication AFTER filter
562: ** ---------------------------------------
563: ** The client side authentication filter uses the
564: ** user dialog messages registered in the HTAlert module.
565: ** By default these are the ones used by the line mode browser but you can
566: ** just register something else.
567: */
2.15 frystyk 568: PUBLIC int HTAuthFilter (HTRequest * request, HTResponse * response,
569: void * param, int status)
2.1 frystyk 570: {
571: /*
572: ** Ask the authentication module to call the right challenge parser
573: ** that understands this scheme
574: */
2.15 frystyk 575: if (HTAA_afterFilter(request, response, param, status) == HT_OK) {
2.1 frystyk 576:
577: /*
578: ** Start request with new credentials. As with the redirection filter
579: ** we reuse the same request object which means that we must
580: ** keep this around until the redirected request has terminated
581: */
582: HTLoad(request, NO);
583:
584: /*
585: ** We return HT_ERROR to make sure that this is the last handler to be
586: ** called. We do this as we don't want any other filter to delete the
587: ** request object now when we have just started a new one ourselves
588: */
589: return HT_ERROR;
590: }
591: return HT_OK;
592: }
593:
594: /*
595: ** Request Loggin AFTER filter
596: ** ---------------------------
597: ** Default Logging filter using the log manager provided by HTLog.c
598: */
2.15 frystyk 599: PUBLIC int HTLogFilter (HTRequest * request, HTResponse * response,
600: void * param, int status)
2.1 frystyk 601: {
602: if (request) {
603: if (HTLog_isOpen()) HTLog_add(request, status);
604: return HT_OK;
605: }
606: return HT_ERROR;
607: }
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