Annotation of libwww/Library/src/HTFilter.c, revision 2.23
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.
2.23 ! frystyk 6: ** @(#) $Id: HTFilter.c,v 2.22 1997/12/04 16:54:50 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) {
2.20 frystyk 155: HTReload cache_mode = HTCache_isFresh(cache, request);
156: if (cache_mode == HT_CACHE_ERROR) cache = NULL;
157: reload = HTMAX(reload, cache_mode);
2.15 frystyk 158: HTRequest_setReloadMode(request, reload);
2.12 frystyk 159:
160: /*
161: ** Now check the mode and add the right headers for the validation
162: ** If we are to validate a cache entry then we get a lock
163: ** on it so that not other requests can steal it.
164: */
2.15 frystyk 165: if (reload == HT_CACHE_RANGE_VALIDATE) {
166: /*
167: ** If we were asked to range validate the cached object then
168: ** use the etag or the last modified for cache validation
169: */
170: validate = YES;
171: HTCache_getLock(cache, request);
172: HTRequest_addRqHd(request, HT_C_IF_RANGE);
173: } else if (reload == HT_CACHE_END_VALIDATE) {
2.12 frystyk 174: /*
175: ** If we were asked to end-to-end validate the cached object
176: ** then use a max-age=0 cache control directive
177: */
178: validate = YES;
179: HTCache_getLock(cache, request);
180: HTRequest_addCacheControl(request, "max-age", "0");
2.15 frystyk 181: } else if (reload == HT_CACHE_VALIDATE) {
2.11 frystyk 182: /*
2.12 frystyk 183: ** If we were asked to validate the cached object then
2.11 frystyk 184: ** use the etag or the last modified for cache validation
2.15 frystyk 185: ** We use both If-None-Match or If-Modified-Since.
2.11 frystyk 186: */
2.12 frystyk 187: validate = YES;
188: HTCache_getLock(cache, request);
2.11 frystyk 189: HTRequest_addRqHd(request, HT_C_IF_NONE_MATCH | HT_C_IMS);
2.20 frystyk 190: } else if (cache) {
2.12 frystyk 191: /*
192: ** The entity does not require any validation at all. We
2.15 frystyk 193: ** can just go ahead and get it from the cache. In case we
194: ** have a fresh subpart of the entity, then we issue a
195: ** conditional GET request with the range set by the cache
196: ** manager. Issuing the conditional range request is
197: ** equivalent to a validation as we have to go out on the
198: ** net. This may have an effect if running in disconnected
199: ** mode. We disable all BEFORE filters as they don't make
200: ** sense while loading the cache entry.
2.12 frystyk 201: */
2.15 frystyk 202: {
203: char * name = HTCache_name(cache);
204: HTAnchor_setPhysical(anchor, name);
205: HTCache_addHit(cache);
206: HT_FREE(name);
207: }
2.11 frystyk 208: }
209: }
2.12 frystyk 210: }
211:
212: /*
213: ** If we are in disconnected mode and we are to validate an entry
214: ** then check whether what mode of disconnected mode we're in. If
215: ** we are to use our own cache then return a "504 Gateway Timeout"
216: */
217: if ((!cache || validate) && disconnect != HT_DISCONNECT_NONE) {
218: if (disconnect == HT_DISCONNECT_EXTERNAL)
219: HTRequest_addCacheControl(request, "only-if-cached", "");
220: else {
221: HTRequest_addError(request, ERR_FATAL, NO,
222: HTERR_GATE_TIMEOUT, "Disconnected Cache Mode",
223: 0, "HTCacheFilter");
224: return HT_ERROR;
225: }
2.11 frystyk 226: }
227: return HT_OK;
228: }
229:
230: /*
2.16 frystyk 231: ** A small BEFORE filter that just finds a cache entry unconditionally
232: ** and loads the entry. All freshness and any other constraints are
233: ** ignored.
234: */
235: PUBLIC int HTCacheLoadFilter (HTRequest * request, void * param, int mode)
236: {
237: HTParentAnchor * anchor = HTRequest_anchor(request);
238: HTCache * cache = HTCache_find(anchor);
239: if (cache) {
240: char * name = HTCache_name(cache);
241: HTAnchor_setPhysical(anchor, name);
242: HTCache_addHit(cache);
243: HT_FREE(name);
244:
245: /*
246: ** Start request directly from the cache. As with the redirection
247: ** filter we reuse the same request object which means that we must
248: ** keep this around until the cache load request has terminated
249: */
250: {
251: HTLoad(request, NO);
252: return HT_ERROR;
253: }
254: }
255: return HT_OK;
256: }
257:
258: /*
2.15 frystyk 259: ** Check the Memory Cache (History list) BEFORE filter
260: ** ---------------------------------------------------
2.11 frystyk 261: ** Check if document is already loaded. The user can define whether
262: ** the history list should follow normal expiration or work as a
263: ** traditional history list where expired documents are not updated.
264: ** We don't check for anything but existence proof of a document
265: ** associated with the anchor as the definition is left to the application
266: */
2.15 frystyk 267: PUBLIC int HTMemoryCacheFilter (HTRequest * request, void * param, int mode)
2.11 frystyk 268: {
269: HTReload validation = HTRequest_reloadMode(request);
270: HTParentAnchor * anchor = HTRequest_anchor(request);
271: void * document = HTAnchor_document(anchor);
2.1 frystyk 272:
2.11 frystyk 273: /*
2.14 frystyk 274: ** We only check the memory cache if it's a GET method
275: */
276: if (HTRequest_method(request) != METHOD_GET) {
277: if (CACHE_TRACE) HTTrace("Mem Cache... We only check GET methods\n");
278: return HT_OK;
279: }
280:
281: /*
2.11 frystyk 282: ** If we are asked to flush the persistent cache then there is no reason
283: ** to do anything here - we're flushing it anyway. Also if no document
284: ** then just exit from this filter.
285: */
286: if (!document || validation > HT_CACHE_FLUSH_MEM) {
287: if (CACHE_TRACE) HTTrace("Mem Cache... No fresh document...\n");
288: return HT_OK;
289: }
2.1 frystyk 290:
2.11 frystyk 291: /*
292: ** If we have a document object associated with this anchor then we also
293: ** have the object in the history list. Depending on what the user asked,
294: ** we can add a cache validator
295: */
2.14 frystyk 296: #if 0
2.11 frystyk 297: if (document) {
298: if (validation != HT_CACHE_FLUSH_MEM) {
2.14 frystyk 299: HTExpiresMode expires = HTCacheMode_expires();
2.11 frystyk 300: if (CACHE_TRACE)
301: HTTrace("Mem Cache... Document already in memory\n");
302: if (expires != HT_EXPIRES_IGNORE) {
303:
304: /*
305: ** Ask the cache manager if this object has expired. Also
306: ** check if we should care about expiration or not.
307: */
308: if (!HTCache_isValid(anchor)) {
309: if (expires == HT_EXPIRES_NOTIFY) {
310:
311: /*
312: ** See if we have a function registered for outputting errors.
313: ** If so then call it and present the message to the user
314: */
315: HTAlertCallback * cbf = HTAlert_find(HT_A_MESSAGE);
316: if (cbf)
317: (*cbf)(request, HT_A_MESSAGE, HTERR_CACHE_EXPIRED,
318: NULL, HTRequest_error(request), NULL);
319: } else {
320: if (CACHE_TRACE) HTTrace("Mem Cache... Expired - autoreload\n");
321: HTRequest_addRqHd(request, HT_C_IF_NONE_MATCH | HT_C_IMS);
322: return HT_OK; /* Must go get it */
323: }
324: }
2.1 frystyk 325: }
326: }
2.14 frystyk 327: return HT_LOADED; /* Got it! */
328: }
329: return HT_OK;
330: #endif
331: if (document && validation != HT_CACHE_FLUSH_MEM) {
332: if (CACHE_TRACE) HTTrace("Mem Cache... Document already in memory\n");
333: return HT_LOADED;
2.1 frystyk 334: }
335: return HT_OK;
336: }
337:
338: /*
2.15 frystyk 339: ** Cache Update AFTER filter
340: ** -------------------------
341: ** On our way out we catch the metainformation and stores it in
342: ** our persistent store. If we have a cache validation (a 304
343: ** response then we use the new metainformation and merges it with
344: ** the existing information already captured in the cache.
345: */
346: PUBLIC int HTCacheUpdateFilter (HTRequest * request, HTResponse * response,
347: void * param, int status)
348: {
349: HTParentAnchor * anchor = HTRequest_anchor(request);
350: HTCache * cache = HTCache_find(anchor);
2.17 frystyk 351: if (cache) {
2.15 frystyk 352:
2.17 frystyk 353: /*
354: ** It may in fact be that the information in the 304 response
355: ** told us that we can't cache the entity anymore. If this is the
356: ** case then flush it now. Otherwise prepare for a cache read
357: */
358: if (CACHE_TRACE) HTTrace("Cache....... Merging metainformation\n");
359: if (HTResponse_isCachable(response) == NO) {
360: HTCache_remove(cache);
361: } else {
362: char * name = HTCache_name(cache);
363: HTAnchor_setPhysical(anchor, name);
364: HTCache_addHit(cache);
365: HT_FREE(name);
366: HTCache_updateMeta(cache, request, response);
367: }
2.15 frystyk 368:
2.17 frystyk 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: */
2.19 frystyk 375: #define SINGLE_CACHE_LOAD
376: #ifdef SINGLE_CACHE_LOAD
2.17 frystyk 377: {
378: static BOOL done = NO;
379: if (!done) {
380: HTLoad(request, YES);
381: done = YES;
382: return HT_ERROR;
383: }
384: }
385: #else
386: HTLoad(request, YES);
2.15 frystyk 387: return HT_ERROR;
2.19 frystyk 388: #endif /* SINGLE_CACHE_LOAD */
2.15 frystyk 389: }
2.17 frystyk 390: return HT_OK;
2.15 frystyk 391: }
392:
393: /*
2.1 frystyk 394: ** Error and Information AFTER filter
395: ** ----------------------------------
396: ** It checks the status code from a request and generates an
397: ** error/information message if required.
398: */
2.15 frystyk 399: PUBLIC int HTInfoFilter (HTRequest * request, HTResponse * response,
400: void * param, int status)
2.1 frystyk 401: {
402: HTParentAnchor * anchor = HTRequest_anchor(request);
403: char * uri = HTAnchor_address((HTAnchor*) anchor);
404: switch (status) {
405: case HT_RETRY:
406: if (PROT_TRACE)
407: HTTrace("Load End.... NOT AVAILABLE, RETRY AT %ld\n",
2.15 frystyk 408: HTResponse_retryTime(response));
2.1 frystyk 409: break;
410:
2.7 frystyk 411: case HT_NO_DATA:
412: {
413: /*
414: ** The document was empty
415: */
416: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
417: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
418: HTRequest_error(request), NULL);
419: if (PROT_TRACE)
420: HTTrace("Load End.... EMPTY: No content `%s\'\n",
421: uri ? uri : "<UNKNOWN>");
422: break;
423: }
2.3 frystyk 424:
425: case HT_LOADED:
2.16 frystyk 426: if (PROT_TRACE) HTTrace("Load End.... OK: `%s\'\n", uri);
427: break;
428:
429: default:
2.3 frystyk 430: {
431: /*
2.16 frystyk 432: ** See if we have a function registered for outputting errors.
433: ** If so then call it and present the message to the user
2.3 frystyk 434: */
435: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
436: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
437: HTRequest_error(request), NULL);
2.1 frystyk 438: if (PROT_TRACE)
439: HTTrace("Load End.... Request ended with code %d\n", status);
440: break;
441: }
2.16 frystyk 442: }
2.1 frystyk 443: HT_FREE(uri);
444: return HT_OK;
445: }
446:
447: /*
448: ** Redirection AFTER filter
449: ** ------------------------
450: ** The redirection handler only handles redirections
451: ** on the GET or HEAD method (or any other safe method)
452: */
2.15 frystyk 453: PUBLIC int HTRedirectFilter (HTRequest * request, HTResponse * response,
454: void * param, int status)
2.1 frystyk 455: {
456: HTMethod method = HTRequest_method(request);
2.15 frystyk 457: HTAnchor * new_anchor = HTResponse_redirection(response);
2.7 frystyk 458: if (!new_anchor) {
459: if (PROT_TRACE) HTTrace("Redirection. No destination\n");
460: return HT_OK;
461: }
462:
2.1 frystyk 463: /*
2.21 frystyk 464: ** Only do automatic redirect on GET and HEAD. Ask for all
465: ** other methods
2.1 frystyk 466: */
2.21 frystyk 467: if (!HTMethod_isSafe(method)) {
468:
469: /*
470: ** If we got a 303 See Other then change the method to GET.
471: ** Otherwise ask the user whether we should continue.
472: */
473: if (status == HT_SEE_OTHER) {
474: if (PROT_TRACE)
475: HTTrace("Redirection. Changing method from %s to GET\n",
476: HTMethod_name(method));
477: HTRequest_setMethod(request, METHOD_GET);
478: } else {
479: HTAlertCallback * prompt = HTAlert_find(HT_A_CONFIRM);
480: if (prompt) {
481: if ((*prompt)(request, HT_A_CONFIRM, HT_MSG_REDIRECTION,
482: NULL, NULL, NULL) != YES)
483: return HT_ERROR;
484: }
2.4 frystyk 485: }
2.1 frystyk 486: }
487:
488: /*
489: ** Start new request with the redirect anchor found in the headers.
490: ** Note that we reuse the same request object which means that we must
491: ** keep this around until the redirected request has terminated. It also
492: ** allows us in an easy way to keep track of the number of redirections
493: ** so that we can detect endless loops.
494: */
2.4 frystyk 495: if (HTRequest_doRetry(request)) {
2.1 frystyk 496: HTLoadAnchor(new_anchor, request);
2.9 frystyk 497: } else {
498: HTRequest_addError(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
499: NULL, 0, "HTRedirectFilter");
500: }
501:
502: /*
503: ** By returning HT_ERROR we make sure that this is the last handler to be
504: ** called. We do this as we don't want any other filter to delete the
505: ** request object now when we have just started a new one ourselves
506: */
507: return HT_ERROR;
508: }
509:
510: /*
2.15 frystyk 511: ** Retry through Proxy AFTER Filter
512: ** --------------------------------
2.9 frystyk 513: ** This filter handles a 305 Use Proxy response and retries the request
514: ** through the proxy
515: */
2.15 frystyk 516: PUBLIC int HTUseProxyFilter (HTRequest * request, HTResponse * response,
517: void * param, int status)
2.9 frystyk 518: {
2.20 frystyk 519: HTAlertCallback * cbf = HTAlert_find(HT_A_CONFIRM);
2.15 frystyk 520: HTAnchor * proxy_anchor = HTResponse_redirection(response);
2.9 frystyk 521: if (!proxy_anchor) {
522: if (PROT_TRACE) HTTrace("Use Proxy... No proxy location\n");
523: return HT_OK;
524: }
525:
526: /*
527: ** Add the proxy to the list. Assume HTTP access method only!
2.20 frystyk 528: ** Because evil servers may rediret the client to an untrusted
529: ** proxy, we can only accept redirects for this particular
530: ** server. Also, we do not know whether this is for HTTP or all
531: ** other requests as well
2.9 frystyk 532: */
2.20 frystyk 533: if ((cbf && (*cbf)(request, HT_A_CONFIRM, HT_MSG_PROXY, NULL,NULL,NULL))) {
2.9 frystyk 534: char * addr = HTAnchor_address(proxy_anchor);
535: HTProxy_add("http", addr);
536: HT_FREE(addr);
537:
2.20 frystyk 538: /*
539: ** Start new request through the proxy if we haven't reached the max
540: ** number of redirections for this request
541: */
542: if (HTRequest_doRetry(request)) {
543: HTLoadAnchor(proxy_anchor, request);
544: } else {
545: HTRequest_addError(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
546: NULL, 0, "HTRedirectFilter");
547: }
548:
549: /*
550: ** By returning HT_ERROR we make sure that this is the last handler to be
551: ** called. We do this as we don't want any other filter to delete the
552: ** request object now when we have just started a new one ourselves
553: */
554: return HT_ERROR;
555:
2.1 frystyk 556: } else {
2.20 frystyk 557: HTRequest_addError(request, ERR_FATAL, NO, HTERR_NO_AUTO_PROXY,
558: NULL, 0, "HTUseProxyFilter");
559: return HT_OK;
2.1 frystyk 560: }
561: }
562:
563: /*
564: ** Client side authentication BEFORE filter
565: ** ----------------------------------------
566: ** The filter generates the credentials required to access a document
567: ** Getting the credentials may involve asking the user
568: */
2.15 frystyk 569: PUBLIC int HTCredentialsFilter (HTRequest * request, void * param, int mode)
2.1 frystyk 570: {
571: /*
572: ** Ask the authentication module to call the right credentials generator
573: ** that understands this scheme
574: */
2.15 frystyk 575: if (HTAA_beforeFilter(request, param, mode) == HT_OK) {
2.1 frystyk 576: if (PROT_TRACE) HTTrace("Credentials. verified\n");
577: return HT_OK;
578: } else {
579: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
580: NULL, 0, "HTCredentialsFilter");
581: return HT_ERROR;
582: }
583: }
584:
585: /*
586: ** Client side authentication AFTER filter
587: ** ---------------------------------------
588: ** The client side authentication filter uses the
589: ** user dialog messages registered in the HTAlert module.
590: ** By default these are the ones used by the line mode browser but you can
591: ** just register something else.
592: */
2.15 frystyk 593: PUBLIC int HTAuthFilter (HTRequest * request, HTResponse * response,
594: void * param, int status)
2.1 frystyk 595: {
596: /*
597: ** Ask the authentication module to call the right challenge parser
598: ** that understands this scheme
599: */
2.15 frystyk 600: if (HTAA_afterFilter(request, response, param, status) == HT_OK) {
2.1 frystyk 601:
602: /*
603: ** Start request with new credentials. As with the redirection filter
604: ** we reuse the same request object which means that we must
605: ** keep this around until the redirected request has terminated
606: */
607: HTLoad(request, NO);
608:
609: /*
610: ** We return HT_ERROR to make sure that this is the last handler to be
611: ** called. We do this as we don't want any other filter to delete the
612: ** request object now when we have just started a new one ourselves
613: */
614: return HT_ERROR;
615: }
616: return HT_OK;
617: }
618:
619: /*
620: ** Request Loggin AFTER filter
621: ** ---------------------------
622: ** Default Logging filter using the log manager provided by HTLog.c
623: */
2.15 frystyk 624: PUBLIC int HTLogFilter (HTRequest * request, HTResponse * response,
625: void * param, int status)
2.1 frystyk 626: {
627: if (request) {
2.23 ! frystyk 628: HTLog * log = (HTLog *) param;
! 629: if (log) HTLog_addCLF(log, request, status);
2.1 frystyk 630: return HT_OK;
631: }
632: return HT_ERROR;
633: }
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