Annotation of libwww/Library/src/HTFilter.c, revision 2.15
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.
2.15 ! frystyk 6: ** @(#) $Id: HTFilter.c,v 2.14 1996/09/13 02:05:25 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: /*
2.15 ! frystyk 229: ** Check the Memory Cache (History list) BEFORE filter
! 230: ** ---------------------------------------------------
2.11 frystyk 231: ** Check if document is already loaded. The user can define whether
232: ** the history list should follow normal expiration or work as a
233: ** traditional history list where expired documents are not updated.
234: ** We don't check for anything but existence proof of a document
235: ** associated with the anchor as the definition is left to the application
236: */
2.15 ! frystyk 237: PUBLIC int HTMemoryCacheFilter (HTRequest * request, void * param, int mode)
2.11 frystyk 238: {
239: HTReload validation = HTRequest_reloadMode(request);
240: HTParentAnchor * anchor = HTRequest_anchor(request);
241: void * document = HTAnchor_document(anchor);
2.1 frystyk 242:
2.11 frystyk 243: /*
2.14 frystyk 244: ** We only check the memory cache if it's a GET method
245: */
246: if (HTRequest_method(request) != METHOD_GET) {
247: if (CACHE_TRACE) HTTrace("Mem Cache... We only check GET methods\n");
248: return HT_OK;
249: }
250:
251: /*
2.11 frystyk 252: ** If we are asked to flush the persistent cache then there is no reason
253: ** to do anything here - we're flushing it anyway. Also if no document
254: ** then just exit from this filter.
255: */
256: if (!document || validation > HT_CACHE_FLUSH_MEM) {
257: if (CACHE_TRACE) HTTrace("Mem Cache... No fresh document...\n");
258: return HT_OK;
259: }
2.1 frystyk 260:
2.11 frystyk 261: /*
262: ** If we have a document object associated with this anchor then we also
263: ** have the object in the history list. Depending on what the user asked,
264: ** we can add a cache validator
265: */
2.14 frystyk 266: #if 0
2.11 frystyk 267: if (document) {
268: if (validation != HT_CACHE_FLUSH_MEM) {
2.14 frystyk 269: HTExpiresMode expires = HTCacheMode_expires();
2.11 frystyk 270: if (CACHE_TRACE)
271: HTTrace("Mem Cache... Document already in memory\n");
272: if (expires != HT_EXPIRES_IGNORE) {
273:
274: /*
275: ** Ask the cache manager if this object has expired. Also
276: ** check if we should care about expiration or not.
277: */
278: if (!HTCache_isValid(anchor)) {
279: if (expires == HT_EXPIRES_NOTIFY) {
280:
281: /*
282: ** See if we have a function registered for outputting errors.
283: ** If so then call it and present the message to the user
284: */
285: HTAlertCallback * cbf = HTAlert_find(HT_A_MESSAGE);
286: if (cbf)
287: (*cbf)(request, HT_A_MESSAGE, HTERR_CACHE_EXPIRED,
288: NULL, HTRequest_error(request), NULL);
289: } else {
290: if (CACHE_TRACE) HTTrace("Mem Cache... Expired - autoreload\n");
291: HTRequest_addRqHd(request, HT_C_IF_NONE_MATCH | HT_C_IMS);
292: return HT_OK; /* Must go get it */
293: }
294: }
2.1 frystyk 295: }
296: }
2.14 frystyk 297: return HT_LOADED; /* Got it! */
298: }
299: return HT_OK;
300: #endif
301: if (document && validation != HT_CACHE_FLUSH_MEM) {
302: if (CACHE_TRACE) HTTrace("Mem Cache... Document already in memory\n");
303: return HT_LOADED;
2.1 frystyk 304: }
305: return HT_OK;
306: }
307:
308: /*
2.15 ! frystyk 309: ** Cache Update AFTER filter
! 310: ** -------------------------
! 311: ** On our way out we catch the metainformation and stores it in
! 312: ** our persistent store. If we have a cache validation (a 304
! 313: ** response then we use the new metainformation and merges it with
! 314: ** the existing information already captured in the cache.
! 315: */
! 316: PUBLIC int HTCacheUpdateFilter (HTRequest * request, HTResponse * response,
! 317: void * param, int status)
! 318: {
! 319: HTParentAnchor * anchor = HTRequest_anchor(request);
! 320: HTCache * cache = HTCache_find(anchor);
! 321:
! 322: /*
! 323: ** If this request resulted in a "304 Not Modified" response then
! 324: ** we merge the new metainformation with the old.
! 325: */
! 326: if (CACHE_TRACE) HTTrace("Cache....... Merging metainformation\n");
! 327:
! 328: /*
! 329: ** It may in fact be that the information in the 304 response
! 330: ** told us that we can't cache the entity anymore. If this is the
! 331: ** case then flush it now. Otherwise prepare for a cache read
! 332: */
! 333: if (HTResponse_isCachable(response) == NO) {
! 334: HTCache_remove(cache);
! 335: } else {
! 336: HTCache_updateMeta(cache, request, response);
! 337: HTRequest_setReloadMode(request, HT_CACHE_OK);
! 338: }
! 339:
! 340: /*
! 341: ** Start request directly from the cache. As with the redirection filter
! 342: ** we reuse the same request object which means that we must
! 343: ** keep this around until the cache load request has terminated
! 344: ** In the case of a
! 345: */
! 346: {
! 347: HTLoad(request, NO);
! 348: return HT_ERROR;
! 349: }
! 350: }
! 351:
! 352: /*
2.1 frystyk 353: ** Error and Information AFTER filter
354: ** ----------------------------------
355: ** It checks the status code from a request and generates an
356: ** error/information message if required.
357: */
2.15 ! frystyk 358: PUBLIC int HTInfoFilter (HTRequest * request, HTResponse * response,
! 359: void * param, int status)
2.1 frystyk 360: {
361: HTParentAnchor * anchor = HTRequest_anchor(request);
362: char * uri = HTAnchor_address((HTAnchor*) anchor);
363: switch (status) {
364: case HT_RETRY:
365: if (PROT_TRACE)
366: HTTrace("Load End.... NOT AVAILABLE, RETRY AT %ld\n",
2.15 ! frystyk 367: HTResponse_retryTime(response));
2.1 frystyk 368: break;
369:
370: case HT_ERROR:
371: {
372: /*
373: ** See if we have a function registered for outputting errors.
374: ** If so then call it and present the message to the user
375: */
376: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
377: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
378: HTRequest_error(request), NULL);
379: if (PROT_TRACE)
380: HTTrace("Load End.... ERROR: Can't access `%s\'\n",
381: uri ? uri : "<UNKNOWN>");
2.3 frystyk 382: break;
2.7 frystyk 383: }
384:
385: case HT_NO_DATA:
386: {
387: /*
388: ** The document was empty
389: */
390: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
391: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
392: HTRequest_error(request), NULL);
393: if (PROT_TRACE)
394: HTTrace("Load End.... EMPTY: No content `%s\'\n",
395: uri ? uri : "<UNKNOWN>");
396: break;
397: }
2.3 frystyk 398:
399: case HT_LOADED:
400: {
401: /*
402: ** Even though we have received a loaded status the thing we have
403: ** loaded successfully may in fact be an error message. We therefore
404: ** look at the error stack to see what to do.
405: */
406: HTAlertCallback *cbf = HTAlert_find(HT_A_MESSAGE);
407: if (cbf) (*cbf)(request, HT_A_MESSAGE, HT_MSG_NULL, NULL,
408: HTRequest_error(request), NULL);
409: if (PROT_TRACE) HTTrace("Load End.... OK: `%s\'\n", uri);
2.1 frystyk 410: break;
411: }
412:
413: default:
414: if (PROT_TRACE)
415: HTTrace("Load End.... Request ended with code %d\n", status);
416: break;
417: }
418:
419: HT_FREE(uri);
420: return HT_OK;
421: }
422:
423: /*
424: ** Redirection AFTER filter
425: ** ------------------------
426: ** The redirection handler only handles redirections
427: ** on the GET or HEAD method (or any other safe method)
428: */
2.15 ! frystyk 429: PUBLIC int HTRedirectFilter (HTRequest * request, HTResponse * response,
! 430: void * param, int status)
2.1 frystyk 431: {
432: HTMethod method = HTRequest_method(request);
2.15 ! frystyk 433: HTAnchor * new_anchor = HTResponse_redirection(response);
2.7 frystyk 434: if (!new_anchor) {
435: if (PROT_TRACE) HTTrace("Redirection. No destination\n");
436: return HT_OK;
437: }
438:
2.1 frystyk 439: /*
440: ** Only do redirect on GET and HEAD
441: */
2.7 frystyk 442: if (!HTMethod_isSafe(method)) {
2.4 frystyk 443: HTAlertCallback * prompt = HTAlert_find(HT_A_CONFIRM);
444: if (prompt) {
445: if ((*prompt)(request, HT_A_CONFIRM, HT_MSG_REDIRECTION,
446: NULL, NULL, NULL) != YES)
447: return HT_ERROR;
448: }
2.1 frystyk 449: }
450:
451: /*
452: ** Start new request with the redirect anchor found in the headers.
453: ** Note that we reuse the same request object which means that we must
454: ** keep this around until the redirected request has terminated. It also
455: ** allows us in an easy way to keep track of the number of redirections
456: ** so that we can detect endless loops.
457: */
2.4 frystyk 458: if (HTRequest_doRetry(request)) {
2.1 frystyk 459: HTLoadAnchor(new_anchor, request);
2.9 frystyk 460: } else {
461: HTRequest_addError(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
462: NULL, 0, "HTRedirectFilter");
463: }
464:
465: /*
466: ** By returning HT_ERROR we make sure that this is the last handler to be
467: ** called. We do this as we don't want any other filter to delete the
468: ** request object now when we have just started a new one ourselves
469: */
470: return HT_ERROR;
471: }
472:
473: /*
2.15 ! frystyk 474: ** Retry through Proxy AFTER Filter
! 475: ** --------------------------------
2.9 frystyk 476: ** This filter handles a 305 Use Proxy response and retries the request
477: ** through the proxy
478: */
2.15 ! frystyk 479: PUBLIC int HTUseProxyFilter (HTRequest * request, HTResponse * response,
! 480: void * param, int status)
2.9 frystyk 481: {
2.15 ! frystyk 482: HTAnchor * proxy_anchor = HTResponse_redirection(response);
2.9 frystyk 483: if (!proxy_anchor) {
484: if (PROT_TRACE) HTTrace("Use Proxy... No proxy location\n");
485: return HT_OK;
486: }
487:
488: /*
489: ** Add the proxy to the list. Assume HTTP access method only!
490: */
491: {
492: char * addr = HTAnchor_address(proxy_anchor);
493: HTProxy_add("http", addr);
494: HT_FREE(addr);
495: }
496:
497: /*
498: ** Start new request through the proxy if we haven't reached the max
499: ** number of redirections for this request
500: */
501: if (HTRequest_doRetry(request)) {
502: HTLoadAnchor(proxy_anchor, request);
2.1 frystyk 503: } else {
504: HTRequest_addError(request, ERR_FATAL, NO, HTERR_MAX_REDIRECT,
505: NULL, 0, "HTRedirectFilter");
506: }
507:
508: /*
509: ** By returning HT_ERROR we make sure that this is the last handler to be
510: ** called. We do this as we don't want any other filter to delete the
511: ** request object now when we have just started a new one ourselves
512: */
513: return HT_ERROR;
514: }
515:
516: /*
517: ** Client side authentication BEFORE filter
518: ** ----------------------------------------
519: ** The filter generates the credentials required to access a document
520: ** Getting the credentials may involve asking the user
521: */
2.15 ! frystyk 522: PUBLIC int HTCredentialsFilter (HTRequest * request, void * param, int mode)
2.1 frystyk 523: {
524: /*
525: ** Ask the authentication module to call the right credentials generator
526: ** that understands this scheme
527: */
2.15 ! frystyk 528: if (HTAA_beforeFilter(request, param, mode) == HT_OK) {
2.1 frystyk 529: if (PROT_TRACE) HTTrace("Credentials. verified\n");
530: return HT_OK;
531: } else {
532: HTRequest_addError(request, ERR_FATAL, NO, HTERR_UNAUTHORIZED,
533: NULL, 0, "HTCredentialsFilter");
534: return HT_ERROR;
535: }
536: }
537:
538: /*
539: ** Client side authentication AFTER filter
540: ** ---------------------------------------
541: ** The client side authentication filter uses the
542: ** user dialog messages registered in the HTAlert module.
543: ** By default these are the ones used by the line mode browser but you can
544: ** just register something else.
545: */
2.15 ! frystyk 546: PUBLIC int HTAuthFilter (HTRequest * request, HTResponse * response,
! 547: void * param, int status)
2.1 frystyk 548: {
549: /*
550: ** Ask the authentication module to call the right challenge parser
551: ** that understands this scheme
552: */
2.15 ! frystyk 553: if (HTAA_afterFilter(request, response, param, status) == HT_OK) {
2.1 frystyk 554:
555: /*
556: ** Start request with new credentials. As with the redirection filter
557: ** we reuse the same request object which means that we must
558: ** keep this around until the redirected request has terminated
559: */
560: HTLoad(request, NO);
561:
562: /*
563: ** We return HT_ERROR to make sure that this is the last handler to be
564: ** called. We do this as we don't want any other filter to delete the
565: ** request object now when we have just started a new one ourselves
566: */
567: return HT_ERROR;
568: }
569: return HT_OK;
570: }
571:
572: /*
573: ** Request Loggin AFTER filter
574: ** ---------------------------
575: ** Default Logging filter using the log manager provided by HTLog.c
576: */
2.15 ! frystyk 577: PUBLIC int HTLogFilter (HTRequest * request, HTResponse * response,
! 578: void * param, int status)
2.1 frystyk 579: {
580: if (request) {
581: if (HTLog_isOpen()) HTLog_add(request, status);
582: return HT_OK;
583: }
584: return HT_ERROR;
585: }
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