Annotation of libwww/Library/src/HTFilter.c, revision 2.16
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.
2.16 ! frystyk 6: ** @(#) $Id: HTFilter.c,v 2.15 1996/10/07 02:04:39 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);
350:
351: /*
352: ** If this request resulted in a "304 Not Modified" response then
353: ** we merge the new metainformation with the old.
354: */
355: if (CACHE_TRACE) HTTrace("Cache....... Merging metainformation\n");
356:
357: /*
358: ** It may in fact be that the information in the 304 response
359: ** told us that we can't cache the entity anymore. If this is the
360: ** case then flush it now. Otherwise prepare for a cache read
361: */
362: if (HTResponse_isCachable(response) == NO) {
363: HTCache_remove(cache);
364: } else {
365: HTCache_updateMeta(cache, request, response);
366: HTRequest_setReloadMode(request, HT_CACHE_OK);
367: }
368:
369: /*
370: ** Start request directly from the cache. As with the redirection filter
371: ** we reuse the same request object which means that we must
372: ** keep this around until the cache load request has terminated
373: ** In the case of a
374: */
375: {
376: HTLoad(request, NO);
377: return HT_ERROR;
378: }
379: }
380:
381: /*
2.1 frystyk 382: ** Error and Information AFTER filter
383: ** ----------------------------------
384: ** It checks the status code from a request and generates an
385: ** error/information message if required.
386: */
2.15 frystyk 387: PUBLIC int HTInfoFilter (HTRequest * request, HTResponse * response,
388: void * param, int status)
2.1 frystyk 389: {
390: HTParentAnchor * anchor = HTRequest_anchor(request);
391: char * uri = HTAnchor_address((HTAnchor*) anchor);
392: switch (status) {
393: case HT_RETRY:
394: if (PROT_TRACE)
395: HTTrace("Load End.... NOT AVAILABLE, RETRY AT %ld\n",
2.15 frystyk 396: HTResponse_retryTime(response));
2.1 frystyk 397: break;
398:
2.7 frystyk 399: case HT_NO_DATA:
400: {
401: /*
402: ** The document was empty
403: */
404: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
405: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
406: HTRequest_error(request), NULL);
407: if (PROT_TRACE)
408: HTTrace("Load End.... EMPTY: No content `%s\'\n",
409: uri ? uri : "<UNKNOWN>");
410: break;
411: }
2.3 frystyk 412:
413: case HT_LOADED:
2.16 ! frystyk 414: if (PROT_TRACE) HTTrace("Load End.... OK: `%s\'\n", uri);
! 415: break;
! 416:
! 417: default:
2.3 frystyk 418: {
419: /*
2.16 ! frystyk 420: ** See if we have a function registered for outputting errors.
! 421: ** If so then call it and present the message to the user
2.3 frystyk 422: */
423: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
424: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
425: HTRequest_error(request), NULL);
2.1 frystyk 426: if (PROT_TRACE)
427: HTTrace("Load End.... Request ended with code %d\n", status);
428: break;
429: }
2.16 ! frystyk 430: }
2.1 frystyk 431: HT_FREE(uri);
432: return HT_OK;
433: }
434:
435: /*
436: ** Redirection AFTER filter
437: ** ------------------------
438: ** The redirection handler only handles redirections
439: ** on the GET or HEAD method (or any other safe method)
440: */
2.15 frystyk 441: PUBLIC int HTRedirectFilter (HTRequest * request, HTResponse * response,
442: void * param, int status)
2.1 frystyk 443: {
444: HTMethod method = HTRequest_method(request);
2.15 frystyk 445: HTAnchor * new_anchor = HTResponse_redirection(response);
2.7 frystyk 446: if (!new_anchor) {
447: if (PROT_TRACE) HTTrace("Redirection. No destination\n");
448: return HT_OK;
449: }
450:
2.1 frystyk 451: /*
452: ** Only do redirect on GET and HEAD
453: */
2.7 frystyk 454: if (!HTMethod_isSafe(method)) {
2.4 frystyk 455: HTAlertCallback * prompt = HTAlert_find(HT_A_CONFIRM);
456: if (prompt) {
457: if ((*prompt)(request, HT_A_CONFIRM, HT_MSG_REDIRECTION,
458: NULL, NULL, NULL) != YES)
459: return HT_ERROR;
460: }
2.1 frystyk 461: }
462:
463: /*
464: ** Start new request with the redirect anchor found in the headers.
465: ** Note that we reuse the same request object which means that we must
466: ** keep this around until the redirected request has terminated. It also
467: ** allows us in an easy way to keep track of the number of redirections
468: ** so that we can detect endless loops.
469: */
2.4 frystyk 470: if (HTRequest_doRetry(request)) {
2.1 frystyk 471: HTLoadAnchor(new_anchor, request);
2.9 frystyk 472: } else {
473: HTRequest_addError(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
474: NULL, 0, "HTRedirectFilter");
475: }
476:
477: /*
478: ** By returning HT_ERROR we make sure that this is the last handler to be
479: ** called. We do this as we don't want any other filter to delete the
480: ** request object now when we have just started a new one ourselves
481: */
482: return HT_ERROR;
483: }
484:
485: /*
2.15 frystyk 486: ** Retry through Proxy AFTER Filter
487: ** --------------------------------
2.9 frystyk 488: ** This filter handles a 305 Use Proxy response and retries the request
489: ** through the proxy
490: */
2.15 frystyk 491: PUBLIC int HTUseProxyFilter (HTRequest * request, HTResponse * response,
492: void * param, int status)
2.9 frystyk 493: {
2.15 frystyk 494: HTAnchor * proxy_anchor = HTResponse_redirection(response);
2.9 frystyk 495: if (!proxy_anchor) {
496: if (PROT_TRACE) HTTrace("Use Proxy... No proxy location\n");
497: return HT_OK;
498: }
499:
500: /*
501: ** Add the proxy to the list. Assume HTTP access method only!
502: */
503: {
504: char * addr = HTAnchor_address(proxy_anchor);
505: HTProxy_add("http", addr);
506: HT_FREE(addr);
507: }
508:
509: /*
510: ** Start new request through the proxy if we haven't reached the max
511: ** number of redirections for this request
512: */
513: if (HTRequest_doRetry(request)) {
514: HTLoadAnchor(proxy_anchor, request);
2.1 frystyk 515: } else {
516: HTRequest_addError(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
517: NULL, 0, "HTRedirectFilter");
518: }
519:
520: /*
521: ** By returning HT_ERROR we make sure that this is the last handler to be
522: ** called. We do this as we don't want any other filter to delete the
523: ** request object now when we have just started a new one ourselves
524: */
525: return HT_ERROR;
526: }
527:
528: /*
529: ** Client side authentication BEFORE filter
530: ** ----------------------------------------
531: ** The filter generates the credentials required to access a document
532: ** Getting the credentials may involve asking the user
533: */
2.15 frystyk 534: PUBLIC int HTCredentialsFilter (HTRequest * request, void * param, int mode)
2.1 frystyk 535: {
536: /*
537: ** Ask the authentication module to call the right credentials generator
538: ** that understands this scheme
539: */
2.15 frystyk 540: if (HTAA_beforeFilter(request, param, mode) == HT_OK) {
2.1 frystyk 541: if (PROT_TRACE) HTTrace("Credentials. verified\n");
542: return HT_OK;
543: } else {
544: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
545: NULL, 0, "HTCredentialsFilter");
546: return HT_ERROR;
547: }
548: }
549:
550: /*
551: ** Client side authentication AFTER filter
552: ** ---------------------------------------
553: ** The client side authentication filter uses the
554: ** user dialog messages registered in the HTAlert module.
555: ** By default these are the ones used by the line mode browser but you can
556: ** just register something else.
557: */
2.15 frystyk 558: PUBLIC int HTAuthFilter (HTRequest * request, HTResponse * response,
559: void * param, int status)
2.1 frystyk 560: {
561: /*
562: ** Ask the authentication module to call the right challenge parser
563: ** that understands this scheme
564: */
2.15 frystyk 565: if (HTAA_afterFilter(request, response, param, status) == HT_OK) {
2.1 frystyk 566:
567: /*
568: ** Start request with new credentials. As with the redirection filter
569: ** we reuse the same request object which means that we must
570: ** keep this around until the redirected request has terminated
571: */
572: HTLoad(request, NO);
573:
574: /*
575: ** We return HT_ERROR to make sure that this is the last handler to be
576: ** called. We do this as we don't want any other filter to delete the
577: ** request object now when we have just started a new one ourselves
578: */
579: return HT_ERROR;
580: }
581: return HT_OK;
582: }
583:
584: /*
585: ** Request Loggin AFTER filter
586: ** ---------------------------
587: ** Default Logging filter using the log manager provided by HTLog.c
588: */
2.15 frystyk 589: PUBLIC int HTLogFilter (HTRequest * request, HTResponse * response,
590: void * param, int status)
2.1 frystyk 591: {
592: if (request) {
593: if (HTLog_isOpen()) HTLog_add(request, status);
594: return HT_OK;
595: }
596: return HT_ERROR;
597: }
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