summaryrefslogtreecommitdiff
path: root/indra/llmessage/llexperiencecache.cpp
blob: 779d1d9d994dcea03009b458bfbcbf9e26fc6b8c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
/** 
 * @file llexperiencecache.cpp
 * @brief llexperiencecache and related class definitions
 *
 * $LicenseInfo:firstyear=2012&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2012, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */
#include "llexperiencecache.h"

#include "llavatarname.h"
#include "llsdserialize.h"
#include "llcoros.h"
#include "lleventcoro.h"
#include "lleventfilter.h"
#include "llcoproceduremanager.h"
#include "lldir.h"
#include <set>
#include <map>
#include <boost/tokenizer.hpp>
#include <boost/concept_check.hpp>

//=========================================================================
namespace LLExperienceCacheImpl
{
	void mapKeys(const LLSD& legacyKeys);
    F64 getErrorRetryDeltaTime(S32 status, LLSD headers);
    bool maxAgeFromCacheControl(const std::string& cache_control, S32 *max_age);

    static const std::string PRIVATE_KEY    = "private_id";
    static const std::string EXPERIENCE_ID  = "public_id";

    static const std::string MAX_AGE("max-age");
    static const boost::char_separator<char> EQUALS_SEPARATOR("=");
    static const boost::char_separator<char> COMMA_SEPARATOR(",");

    // *TODO$: this seems to be tied to mapKeys which is used by bootstrap.... but I don't think that bootstrap is used.
    typedef std::map<LLUUID, LLUUID> KeyMap;
    KeyMap privateToPublicKeyMap;
}

//=========================================================================
const std::string LLExperienceCache::PRIVATE_KEY	= "private_id";
const std::string LLExperienceCache::MISSING       	= "DoesNotExist";

const std::string LLExperienceCache::AGENT_ID      = "agent_id";
const std::string LLExperienceCache::GROUP_ID      = "group_id";
const std::string LLExperienceCache::EXPERIENCE_ID	= "public_id";
const std::string LLExperienceCache::NAME			= "name";
const std::string LLExperienceCache::PROPERTIES		= "properties";
const std::string LLExperienceCache::EXPIRES		= "expiration";  
const std::string LLExperienceCache::DESCRIPTION	= "description";
const std::string LLExperienceCache::QUOTA         	= "quota";
const std::string LLExperienceCache::MATURITY      = "maturity";
const std::string LLExperienceCache::METADATA      = "extended_metadata";
const std::string LLExperienceCache::SLURL         	= "slurl";

// should be in sync with experience-api/experiences/models.py
const int LLExperienceCache::PROPERTY_INVALID		= 1 << 0;
const int LLExperienceCache::PROPERTY_PRIVILEGED	= 1 << 3;
const int LLExperienceCache::PROPERTY_GRID			= 1 << 4;
const int LLExperienceCache::PROPERTY_PRIVATE		= 1 << 5;
const int LLExperienceCache::PROPERTY_DISABLED	= 1 << 6;  
const int LLExperienceCache::PROPERTY_SUSPENDED	= 1 << 7;

// default values
const F64 LLExperienceCache::DEFAULT_EXPIRATION	= 600.0;
const S32 LLExperienceCache::DEFAULT_QUOTA			= 128; // this is megabytes
const int LLExperienceCache::SEARCH_PAGE_SIZE     = 30;

//=========================================================================
LLExperienceCache::LLExperienceCache():
    mShutdown(false)
{
}

LLExperienceCache::~LLExperienceCache()
{

}

void LLExperienceCache::initSingleton()
{
    mCacheFileName = gDirUtilp->getExpandedFilename(LL_PATH_CACHE, "experience_cache.xml");

    LL_INFOS("ExperienceCache") << "Loading " << mCacheFileName << LL_ENDL;
    llifstream cache_stream(mCacheFileName.c_str());

    if (cache_stream.is_open())
    {
        cache_stream >> (*this);
    }

    LLCoros::instance().launch("LLExperienceCache::idleCoro",
        boost::bind(&LLExperienceCache::idleCoro, this));

}

void LLExperienceCache::cleanup()
{
    LL_INFOS("ExperienceCache") << "Saving " << mCacheFileName << LL_ENDL;

    llofstream cache_stream(mCacheFileName.c_str());
    if (cache_stream.is_open())
    {
        cache_stream << (*this);
    }
    mShutdown = true;
}

//-------------------------------------------------------------------------
void LLExperienceCache::importFile(std::istream& istr)
{
    LLSD data;
    S32 parse_count = LLSDSerialize::fromXMLDocument(data, istr);
    if (parse_count < 1) return;

    LLSD experiences = data["experiences"];

    LLUUID public_key;
    LLSD::map_const_iterator it = experiences.beginMap();
    for (; it != experiences.endMap(); ++it)
    {
        public_key.set(it->first);
        mCache[public_key] = it->second;
    }

    LL_DEBUGS("ExperienceCache") << "importFile() loaded " << mCache.size() << LL_ENDL;
}

void LLExperienceCache::exportFile(std::ostream& ostr) const
{
    LLSD experiences;

    cache_t::const_iterator it = mCache.begin();
    for (; it != mCache.end(); ++it)
    {
        if (!it->second.has(EXPERIENCE_ID) || it->second[EXPERIENCE_ID].asUUID().isNull() ||
            it->second.has("DoesNotExist") || (it->second.has(PROPERTIES) && it->second[PROPERTIES].asInteger() & PROPERTY_INVALID))
            continue;

        experiences[it->first.asString()] = it->second;
    }

    LLSD data;
    data["experiences"] = experiences;

    LLSDSerialize::toPrettyXML(data, ostr);
}

// *TODO$: Rider: This method does not seem to be used... it may be useful in testing.
void LLExperienceCache::bootstrap(const LLSD& legacyKeys, int initialExpiration)
{
	LLExperienceCacheImpl::mapKeys(legacyKeys);
    LLSD::array_const_iterator it = legacyKeys.beginArray();
    for (/**/; it != legacyKeys.endArray(); ++it)
    {
        LLSD experience = *it;
        if (experience.has(EXPERIENCE_ID))
        {
            if (!experience.has(EXPIRES))
            {
                experience[EXPIRES] = initialExpiration;
            }
            processExperience(experience[EXPERIENCE_ID].asUUID(), experience);
        }
        else
        {
            LL_WARNS("ExperienceCache")
                << "Skipping bootstrap entry which is missing " << EXPERIENCE_ID
                << LL_ENDL;
        }
    }
}

LLUUID LLExperienceCache::getExperienceId(const LLUUID& private_key, bool null_if_not_found)
{
    if (private_key.isNull())
        return LLUUID::null;

    LLExperienceCacheImpl::KeyMap::const_iterator it = LLExperienceCacheImpl::privateToPublicKeyMap.find(private_key);
    if (it == LLExperienceCacheImpl::privateToPublicKeyMap.end())
    {
        if (null_if_not_found)
        {
            return LLUUID::null;
        }
        return private_key;
    }
    LL_WARNS("LLExperience") << "converted private key " << private_key << " to experience_id " << it->second << LL_ENDL;
    return it->second;
}

//=========================================================================
void LLExperienceCache::processExperience(const LLUUID& public_key, const LLSD& experience)
{
    LL_INFOS("ExperienceCache") << "Processing experience \"" << experience[NAME] << "\" with key " << public_key.asString() << LL_ENDL;

	mCache[public_key]=experience;
	LLSD & row = mCache[public_key];

	if(row.has(EXPIRES))
	{
		row[EXPIRES] = row[EXPIRES].asReal() + LLFrameTimer::getTotalSeconds();
	}

	if(row.has(EXPERIENCE_ID))
	{
		mPendingQueue.erase(row[EXPERIENCE_ID].asUUID());
	}

	//signal
	signal_map_t::iterator sig_it =	mSignalMap.find(public_key);
	if (sig_it != mSignalMap.end())
	{
		signal_ptr signal = sig_it->second;
		(*signal)(experience);

		mSignalMap.erase(public_key);
	}
}

const LLExperienceCache::cache_t& LLExperienceCache::getCached()
{
	return mCache;
}

void LLExperienceCache::requestExperiencesCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &httpAdapter, std::string url, RequestQueue_t requests)
{
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest());

    //LL_INFOS("requestExperiencesCoro") << "url: " << url << LL_ENDL;

    LLSD result = httpAdapter->getAndSuspend(httpRequest, url);
        
    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status)
    {
        F64 now = LLFrameTimer::getTotalSeconds();

        LLSD headers = httpResults[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS_HEADERS];
        // build dummy entries for the failed requests
        for (RequestQueue_t::const_iterator it = requests.begin(); it != requests.end(); ++it)
        {
            LLSD exp = get(*it);
            //leave the properties alone if we already have a cache entry for this xp
            if (exp.isUndefined())
            {
                exp[PROPERTIES] = PROPERTY_INVALID;
            }
            exp[EXPIRES] = now + LLExperienceCacheImpl::getErrorRetryDeltaTime(status, headers);
            exp[EXPERIENCE_ID] = *it;
            exp["key_type"] = EXPERIENCE_ID;
            exp["uuid"] = *it;
            exp["error"] = (LLSD::Integer)status.getType();
            exp[QUOTA] = DEFAULT_QUOTA;

            processExperience(*it, exp);
        }
        return;
    }

    LLSD experiences = result["experience_keys"];
    
    for (LLSD::array_const_iterator it = experiences.beginArray(); 
        it != experiences.endArray(); ++it)
    {
        const LLSD& row = *it;
        LLUUID public_key = row[EXPERIENCE_ID].asUUID();

        LL_DEBUGS("ExperienceCache") << "Received result for " << public_key
            << " display '" << row[LLExperienceCache::NAME].asString() << "'" << LL_ENDL;

        processExperience(public_key, row);
    }

    LLSD error_ids = result["error_ids"];
    
    for (LLSD::array_const_iterator errIt = error_ids.beginArray(); 
        errIt != error_ids.endArray(); ++errIt)
    {
        LLUUID id = errIt->asUUID();
        LLSD exp;
        exp[EXPIRES] = DEFAULT_EXPIRATION;
        exp[EXPERIENCE_ID] = id;
        exp[PROPERTIES] = PROPERTY_INVALID;
        exp[MISSING] = true;
        exp[QUOTA] = DEFAULT_QUOTA;

        processExperience(id, exp);
        LL_WARNS("ExperienceCache") << "LLExperienceResponder::result() error result for " << id << LL_ENDL;
    }

}


void LLExperienceCache::requestExperiences()
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    std::string urlBase = mCapability("GetExperienceInfo");
    if (urlBase.empty())
    {
        LL_WARNS("ExperienceCache") << "No Experience capability." << LL_ENDL;
        return;
    }

    if (*urlBase.rbegin() != '/')
    {
        urlBase += "/";
    }
    urlBase += "id/";


	F64 now = LLFrameTimer::getTotalSeconds();

    const U32 EXP_URL_SEND_THRESHOLD = 3000;
    const U32 PAGE_SIZE = EXP_URL_SEND_THRESHOLD / UUID_STR_LENGTH;

    std::ostringstream ostr;
    ostr << urlBase << "?page_size=" << PAGE_SIZE;
    RequestQueue_t  requests;

    while (!mRequestQueue.empty())
    {
        RequestQueue_t::iterator it = mRequestQueue.begin();
        LLUUID key = (*it);
        mRequestQueue.erase(it);
        requests.insert(key);

        ostr << "&" << EXPERIENCE_ID << "=" << key.asString();
        mPendingQueue[key] = now;
        
        if (mRequestQueue.empty() || (ostr.tellp() > EXP_URL_SEND_THRESHOLD))
        {   // request is placed in the coprocedure pool for the ExpCache cache.  Throttling is done by the pool itself.
            LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "RequestExperiences",
                boost::bind(&LLExperienceCache::requestExperiencesCoro, this, _1, ostr.str(), requests) );

            ostr.str(std::string());
            ostr << urlBase << "?page_size=" << PAGE_SIZE;
            requests.clear();
        }
    }

}


bool LLExperienceCache::isRequestPending(const LLUUID& public_key)
{
	bool isPending = false;
	const F64 PENDING_TIMEOUT_SECS = 5.0 * 60.0;

    PendingQueue_t::const_iterator it = mPendingQueue.find(public_key);

	if(it != mPendingQueue.end())
	{
		F64 expire_time = LLFrameTimer::getTotalSeconds() - PENDING_TIMEOUT_SECS;
		isPending = (it->second > expire_time);
	}

	return isPending;
}

void LLExperienceCache::setCapabilityQuery(LLExperienceCache::CapabilityQuery_t queryfn)
{
    mCapability = queryfn;
}


void LLExperienceCache::idleCoro()
{
    const F32 SECS_BETWEEN_REQUESTS = 0.5f;
    const F32 ERASE_EXPIRED_TIMEOUT = 60.f; // seconds

    LL_INFOS("ExperienceCache") << "Launching Experience cache idle coro." << LL_ENDL;
    do 
    {
        llcoro::suspendUntilTimeout(SECS_BETWEEN_REQUESTS);

        if (mEraseExpiredTimer.checkExpirationAndReset(ERASE_EXPIRED_TIMEOUT))
        {
            eraseExpired();
        }

        if (!mRequestQueue.empty())
        {
            requestExperiences();
        }

    } while (!mShutdown);

    // The coroutine system will likely be shut down by the time we get to this point
    // (or at least no further cycling will occur on it since the user has decided to quit.)
}

void LLExperienceCache::erase(const LLUUID& key)
{
	cache_t::iterator it = mCache.find(key);
				
	if(it != mCache.end())
	{
		mCache.erase(it);
	}
}

void LLExperienceCache::eraseExpired()
{
	F64 now = LLFrameTimer::getTotalSeconds();
	cache_t::iterator it = mCache.begin();
	while (it != mCache.end())
	{
		cache_t::iterator cur = it;
		LLSD& exp = cur->second;
		++it;

        //LL_INFOS("ExperienceCache") << "Testing experience \"" << exp[NAME] << "\" with exp time " << exp[EXPIRES].asReal() << "(now = " << now << ")" << LL_ENDL;

		if(exp.has(EXPIRES) && exp[EXPIRES].asReal() < now)
		{
            if(!exp.has(EXPERIENCE_ID))
			{
                LL_WARNS("ExperienceCache") << "Removing experience with no id " << LL_ENDL ;
                mCache.erase(cur);
			}
            else
            {
                LLUUID id = exp[EXPERIENCE_ID].asUUID();
                LLUUID private_key = exp.has(LLExperienceCache::PRIVATE_KEY) ? exp[LLExperienceCache::PRIVATE_KEY].asUUID():LLUUID::null;
                if(private_key.notNull() || !exp.has("DoesNotExist"))
				{
					fetch(id, true);
				}
				else
				{
                    LL_WARNS("ExperienceCache") << "Removing invalid experience " << id << LL_ENDL ;
					mCache.erase(cur);
				}
			}
		}
	}
}
	
bool LLExperienceCache::fetch(const LLUUID& key, bool refresh/* = true*/)
{
	if(!key.isNull() && !isRequestPending(key) && (refresh || mCache.find(key)==mCache.end()))
	{
		LL_DEBUGS("ExperienceCache") << " queue request for " << EXPERIENCE_ID << " " << key << LL_ENDL;

        mRequestQueue.insert(key);
		return true;
	}
	return false;
}

void LLExperienceCache::insert(const LLSD& experience_data)
{
	if(experience_data.has(EXPERIENCE_ID))
	{
        processExperience(experience_data[EXPERIENCE_ID].asUUID(), experience_data);
	}
	else
	{
		LL_WARNS("ExperienceCache") << ": Ignoring cache insert of experience which is missing " << EXPERIENCE_ID << LL_ENDL;
	}
}

const LLSD& LLExperienceCache::get(const LLUUID& key)
{
	static const LLSD empty;
	
	if(key.isNull()) 
		return empty;
	cache_t::const_iterator it = mCache.find(key);

	if (it != mCache.end())
	{
		return it->second;
	}
	fetch(key);

	return empty;
}

void LLExperienceCache::get(const LLUUID& key, LLExperienceCache::ExperienceGetFn_t slot)
{
	if(key.isNull()) 
		return;

	cache_t::const_iterator it = mCache.find(key);
	if (it != mCache.end())
	{
		// ...name already exists in cache, fire callback now
		callback_signal_t signal;
		signal.connect(slot);
			
		signal(it->second);
		return;
	}

	fetch(key);

	signal_ptr signal = signal_ptr(new callback_signal_t());
	
	std::pair<signal_map_t::iterator, bool> result = mSignalMap.insert(signal_map_t::value_type(key, signal));
	if (!result.second)
		signal = (*result.first).second;
	signal->connect(slot);
}

//=========================================================================
void LLExperienceCache::fetchAssociatedExperience(const LLUUID& objectId, const LLUUID& itemId, ExperienceGetFn_t fn)
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "Fetch Associated",
        boost::bind(&LLExperienceCache::fetchAssociatedExperienceCoro, this, _1, objectId, itemId, fn));
}

void LLExperienceCache::fetchAssociatedExperienceCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &httpAdapter, LLUUID objectId, LLUUID itemId, ExperienceGetFn_t fn)
{
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest());
    std::string url = mCapability("GetMetadata");

    if (url.empty())
    {
        LL_WARNS("ExperienceCache") << "No Metadata capability." << LL_ENDL;
        return;
    }

    LLSD fields;
    fields.append("experience");
    LLSD data;
    data["object-id"] = objectId;
    data["item-id"] = itemId;
    data["fields"] = fields;

    LLSD result = httpAdapter->postAndSuspend(httpRequest, url, data);

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if ((!status) || (!result.has("experience")))
    {
        LLSD failure;
        if (!status)
        {
            failure["error"] = (LLSD::Integer)status.getType();
            failure["message"] = status.getMessage();
        }
        else 
        {
            failure["error"] = -1;
            failure["message"] = "no experience";
        }
        if (fn && !fn.empty())
            fn(failure);
        return;
    }

    LLUUID expId = result["experience"].asUUID();
    get(expId, fn);
}

//-------------------------------------------------------------------------
void LLExperienceCache::findExperienceByName(const std::string text, int page, ExperienceGetFn_t fn)
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "Search Name",
        boost::bind(&LLExperienceCache::findExperienceByNameCoro, this, _1, text, page, fn));
}

void LLExperienceCache::findExperienceByNameCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &httpAdapter, std::string text, int page, ExperienceGetFn_t fn)
{
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest());
    std::ostringstream url;


    url << mCapability("FindExperienceByName")  << "?page=" << page << "&page_size=" << SEARCH_PAGE_SIZE << "&query=" << LLURI::escape(text);

    LLSD result = httpAdapter->getAndSuspend(httpRequest, url.str());

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status)
    {
        fn(LLSD());
        return;
    }

    result.erase(LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS);

    const LLSD& experiences = result["experience_keys"];
    for (LLSD::array_const_iterator it = experiences.beginArray(); it != experiences.endArray(); ++it)
    {
        insert(*it);
    }

    fn(result);
}

//-------------------------------------------------------------------------
void LLExperienceCache::getGroupExperiences(const LLUUID &groupId, ExperienceGetFn_t fn)
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "Group Experiences",
        boost::bind(&LLExperienceCache::getGroupExperiencesCoro, this, _1, groupId, fn));
}

void LLExperienceCache::getGroupExperiencesCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &httpAdapter, LLUUID groupId, ExperienceGetFn_t fn)
{
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest());

    // search for experiences owned by the current group
    std::string url = mCapability("GroupExperiences");
    if (url.empty())
    {
        LL_WARNS("ExperienceCache") << "No Group Experiences capability" << LL_ENDL;
        return;
    }

    url += "?" + groupId.asString();

    LLSD result = httpAdapter->getAndSuspend(httpRequest, url);

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status)
    {
        fn(LLSD());
        return;
    }

    const LLSD& experienceIds = result["experience_ids"];
    fn(experienceIds);
}

//-------------------------------------------------------------------------
void LLExperienceCache::getRegionExperiences(CapabilityQuery_t regioncaps, ExperienceGetFn_t fn)
{
    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "Region Experiences",
        boost::bind(&LLExperienceCache::regionExperiencesCoro, this, _1, regioncaps, false, LLSD(), fn));
}

void LLExperienceCache::setRegionExperiences(CapabilityQuery_t regioncaps, const LLSD &experiences, ExperienceGetFn_t fn)
{
    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "Region Experiences",
        boost::bind(&LLExperienceCache::regionExperiencesCoro, this, _1, regioncaps, true, experiences, fn));
}

void LLExperienceCache::regionExperiencesCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &httpAdapter,
    CapabilityQuery_t regioncaps, bool update, LLSD experiences, ExperienceGetFn_t fn)
{
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest());

    // search for experiences owned by the current group
    std::string url = regioncaps("RegionExperiences");
    if (url.empty())
    {
        LL_WARNS("ExperienceCache") << "No Region Experiences capability" << LL_ENDL;
        return;
    }

    LLSD result;
    if (update)
        result = httpAdapter->postAndSuspend(httpRequest, url, experiences);
    else
        result = httpAdapter->getAndSuspend(httpRequest, url);

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status)
    {
//      fn(LLSD());
        return;
    }

    result.erase(LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS);
    fn(result);

}

//-------------------------------------------------------------------------
void LLExperienceCache::getExperiencePermission(const LLUUID &experienceId, ExperienceGetFn_t fn)
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    std::string url = mCapability("ExperiencePreferences") + "?" + experienceId.asString();
    
    permissionInvoker_fn invoker(boost::bind(
        // Humans ignore next line.  It is just a cast to specify which LLCoreHttpUtil::HttpCoroutineAdapter routine overload.
        static_cast<LLSD(LLCoreHttpUtil::HttpCoroutineAdapter::*)(LLCore::HttpRequest::ptr_t, const std::string &, LLCore::HttpOptions::ptr_t, LLCore::HttpHeaders::ptr_t)>
        //----
        // _1 -> httpAdapter
        // _2 -> httpRequest
        // _3 -> url
        (&LLCoreHttpUtil::HttpCoroutineAdapter::getAndSuspend), _1, _2, _3, LLCore::HttpOptions::ptr_t(), LLCore::HttpHeaders::ptr_t()));


    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "Preferences Set",
        boost::bind(&LLExperienceCache::experiencePermissionCoro, this, _1, invoker, url, fn));
}

void LLExperienceCache::setExperiencePermission(const LLUUID &experienceId, const std::string &permission, ExperienceGetFn_t fn)
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    std::string url = mCapability("ExperiencePreferences");
    if (url.empty())
        return;
    LLSD permData;
    LLSD data;
    permData["permission"] = permission;
    data[experienceId.asString()] = permData;

    permissionInvoker_fn invoker(boost::bind(
        // Humans ignore next line.  It is just a cast to specify which LLCoreHttpUtil::HttpCoroutineAdapter routine overload.
        static_cast<LLSD(LLCoreHttpUtil::HttpCoroutineAdapter::*)(LLCore::HttpRequest::ptr_t, const std::string &, const LLSD &, LLCore::HttpOptions::ptr_t, LLCore::HttpHeaders::ptr_t)>
        //----
        // _1 -> httpAdapter
        // _2 -> httpRequest
        // _3 -> url
        (&LLCoreHttpUtil::HttpCoroutineAdapter::putAndSuspend), _1, _2, _3, data, LLCore::HttpOptions::ptr_t(), LLCore::HttpHeaders::ptr_t()));


    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "Preferences Set",
        boost::bind(&LLExperienceCache::experiencePermissionCoro, this, _1, invoker, url, fn));
}

void LLExperienceCache::forgetExperiencePermission(const LLUUID &experienceId, ExperienceGetFn_t fn)
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    std::string url = mCapability("ExperiencePreferences") + "?" + experienceId.asString();


    permissionInvoker_fn invoker(boost::bind(
        // Humans ignore next line.  It is just a cast to specify which LLCoreHttpUtil::HttpCoroutineAdapter routine overload.
        static_cast<LLSD(LLCoreHttpUtil::HttpCoroutineAdapter::*)(LLCore::HttpRequest::ptr_t, const std::string &, LLCore::HttpOptions::ptr_t, LLCore::HttpHeaders::ptr_t)>
        //----
        // _1 -> httpAdapter
        // _2 -> httpRequest
        // _3 -> url
        (&LLCoreHttpUtil::HttpCoroutineAdapter::deleteAndSuspend), _1, _2, _3, LLCore::HttpOptions::ptr_t(), LLCore::HttpHeaders::ptr_t()));


    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "Preferences Set",
        boost::bind(&LLExperienceCache::experiencePermissionCoro, this, _1, invoker, url, fn));
}

void LLExperienceCache::experiencePermissionCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &httpAdapter, permissionInvoker_fn invokerfn, std::string url, ExperienceGetFn_t fn)
{
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest());

    // search for experiences owned by the current group

    LLSD result = invokerfn(httpAdapter, httpRequest, url);

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);
    result.erase(LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS);

    if (status)
    {
        fn(result);
    }
}

//-------------------------------------------------------------------------
void LLExperienceCache::getExperienceAdmin(const LLUUID &experienceId, ExperienceGetFn_t fn)
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "IsAdmin",
        boost::bind(&LLExperienceCache::getExperienceAdminCoro, this, _1, experienceId, fn));
}

void LLExperienceCache::getExperienceAdminCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &httpAdapter, LLUUID experienceId, ExperienceGetFn_t fn)
{
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest());

    std::string url = mCapability("IsExperienceAdmin");
    if (url.empty())
    {
        LL_WARNS("ExperienceCache") << "No Region Experiences capability" << LL_ENDL;
        return;
    }
    url += "?experience_id=" + experienceId.asString();

    LLSD result = httpAdapter->getAndSuspend(httpRequest, url);
//     LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
//     LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    fn(result);
}

//-------------------------------------------------------------------------
void LLExperienceCache::updateExperience(LLSD updateData, ExperienceGetFn_t fn)
{
    if (mCapability.empty())
    {
        LL_WARNS("ExperienceCache") << "Capability query method not set." << LL_ENDL;
        return;
    }

    LLCoprocedureManager::instance().enqueueCoprocedure("ExpCache", "IsAdmin",
        boost::bind(&LLExperienceCache::updateExperienceCoro, this, _1, updateData, fn));
}

void LLExperienceCache::updateExperienceCoro(LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t &httpAdapter, LLSD updateData, ExperienceGetFn_t fn)
{
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest());

    std::string url = mCapability("UpdateExperience");
    if (url.empty())
    {
        LL_WARNS("ExperienceCache") << "No Region Experiences capability" << LL_ENDL;
        return;
    }

    updateData.erase(LLExperienceCache::QUOTA);
    updateData.erase(LLExperienceCache::EXPIRES);
    updateData.erase(LLExperienceCache::AGENT_ID);

    LLSD result = httpAdapter->postAndSuspend(httpRequest, url, updateData);

    fn(result);
}

//=========================================================================
void LLExperienceCacheImpl::mapKeys(const LLSD& legacyKeys)
{
	LLSD::array_const_iterator exp = legacyKeys.beginArray();
	for (/**/; exp != legacyKeys.endArray(); ++exp)
	{
        if (exp->has(LLExperienceCacheImpl::EXPERIENCE_ID) && exp->has(LLExperienceCacheImpl::PRIVATE_KEY))
		{
            LLExperienceCacheImpl::privateToPublicKeyMap[(*exp)[LLExperienceCacheImpl::PRIVATE_KEY].asUUID()] = 
                (*exp)[LLExperienceCacheImpl::EXPERIENCE_ID].asUUID();
		}
	}
}

// Return time to retry a request that generated an error, based on
// error type and headers.  Return value is seconds-since-epoch.
F64 LLExperienceCacheImpl::getErrorRetryDeltaTime(S32 status, LLSD headers)
{

    // Retry-After takes priority
    LLSD retry_after = headers["retry-after"];
    if (retry_after.isDefined())
    {
        // We only support the delta-seconds type
        S32 delta_seconds = retry_after.asInteger();
        if (delta_seconds > 0)
        {
            // ...valid delta-seconds
            return F64(delta_seconds);
        }
    }

    // If no Retry-After, look for Cache-Control max-age
    // Allow the header to override the default
    LLSD cache_control_header = headers["cache-control"];
    if (cache_control_header.isDefined())
    {
        S32 max_age = 0;
        std::string cache_control = cache_control_header.asString();
        if (LLExperienceCacheImpl::maxAgeFromCacheControl(cache_control, &max_age))
        {
            LL_WARNS("ExperienceCache")
                << "got EXPIRES from headers, max_age " << max_age
                << LL_ENDL;
            return (F64)max_age;
        }
    }

    // No information in header, make a guess
    if (status == 503)
    {
        // ...service unavailable, retry soon
        const F64 SERVICE_UNAVAILABLE_DELAY = 600.0; // 10 min
        return SERVICE_UNAVAILABLE_DELAY;
    }
    else if (status == 499)
    {
        // ...we were probably too busy, retry quickly
        const F64 BUSY_DELAY = 10.0; // 10 seconds
        return BUSY_DELAY;

    }
    else
    {
        // ...other unexpected error
        const F64 DEFAULT_DELAY = 3600.0; // 1 hour
        return DEFAULT_DELAY;
    }
}

bool LLExperienceCacheImpl::maxAgeFromCacheControl(const std::string& cache_control, S32 *max_age)
{
	// Split the string on "," to get a list of directives
	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
	tokenizer directives(cache_control, COMMA_SEPARATOR);
	
	tokenizer::iterator token_it = directives.begin();
	for ( ; token_it != directives.end(); ++token_it)
	{
		// Tokens may have leading or trailing whitespace
		std::string token = *token_it;
		LLStringUtil::trim(token);
		
		if (token.compare(0, MAX_AGE.size(), MAX_AGE) == 0)
		{
			// ...this token starts with max-age, so let's chop it up by "="
			tokenizer subtokens(token, EQUALS_SEPARATOR);
			tokenizer::iterator subtoken_it = subtokens.begin();
			
			// Must have a token
			if (subtoken_it == subtokens.end()) return false;
			std::string subtoken = *subtoken_it;
			
			// Must exactly equal "max-age"
			LLStringUtil::trim(subtoken);
			if (subtoken != MAX_AGE) return false;
			
			// Must have another token
			++subtoken_it;
			if (subtoken_it == subtokens.end()) return false;
			subtoken = *subtoken_it;
			
			// Must be a valid integer
			// *NOTE: atoi() returns 0 for invalid values, so we have to
			// check the string first.
			// *TODO: Do servers ever send "0000" for zero?  We don't handle it
			LLStringUtil::trim(subtoken);
			if (subtoken == "0")
			{
				*max_age = 0;
				return true;
			}
			S32 val = atoi( subtoken.c_str() );
			if (val > 0 && val < S32_MAX)
			{
				*max_age = val;
				return true;
			}
			return false;
		}
	}
	return false;
}