summaryrefslogtreecommitdiff
path: root/indra/llmessage/llcorehttputil.h
blob: 6d0d68cf24e822c81025b00ab2fb2df989677e07 (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
/** 
 * @file llcorehttputil.h
 * @date 2014-08-25
 * @brief Adapter and utility classes expanding the llcorehttp interfaces.
 *
 * $LicenseInfo:firstyear=2014&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2014, 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
 * $/LicenseInfo$
 */

#ifndef LL_LLCOREHTTPUTIL_H
#define LL_LLCOREHTTPUTIL_H

#include <string>

#include "httpcommon.h"
#include "httprequest.h"
#include "httpresponse.h"
#include "httpheaders.h"
#include "httpoptions.h"
#include "httphandler.h"
#include "llhttpconstants.h" // *TODO: move to llcorehttp
#include "bufferarray.h"
#include "bufferstream.h"
#include "llsd.h"
#include "llevents.h"
#include "llcoros.h"
#include "lleventcoro.h"
#include "llassettype.h"
#include "lluuid.h"

///
/// The base llcorehttp library implements many HTTP idioms
/// used in the viewer but not all.  That library intentionally
/// avoids the use of LLSD and its conventions which aren't
/// universally applicable.  This module, using namespace
/// LLCoreHttpUtil, provides the additional helper functions
/// that support idiomatic LLSD transport via the newer
/// llcorehttp library.
///
namespace LLCoreHttpUtil
{
/// Allow access to to the property settings methods.
typedef boost::function<bool(const std::string &)> BoolSettingQuery_t;
typedef boost::function<void(const std::string &, bool, const std::string &)> BoolSettingUpdate_t;

void setPropertyMethods(BoolSettingQuery_t queryfn, BoolSettingUpdate_t updatefn);


extern const F32 HTTP_REQUEST_EXPIRY_SECS;

/// Attempt to convert a response object's contents to LLSD.
/// It is expected that the response body will be of non-zero
/// length on input but basic checks will be performed and
/// and error (false status) returned if there is no data.
/// If there is data but it cannot be successfully parsed,
/// an error is also returned.  If successfully parsed,
/// the output LLSD object, out_llsd, is written with the
/// result and true is returned.
///
/// @arg	response	Response object as returned in
///						in an HttpHandler onCompleted() callback.
/// @arg	log			If true, LLSD parser will emit errors
///						as LL_INFOS-level messages as it parses.
///						Otherwise, it *should* be a quiet parse.
/// @arg	out_llsd	Output LLSD object written only upon
///						successful parse of the response object.
///
/// @return				Returns true (and writes to out_llsd) if
///						parse was successful.  False otherwise.
///
bool responseToLLSD(LLCore::HttpResponse * response,
					bool log,
					LLSD & out_llsd);

/// Create a std::string representation of a response object
/// suitable for logging.  Mainly intended for logging of
/// failures and debug information.  This won't be fast,
/// just adequate.
std::string responseToString(LLCore::HttpResponse * response);


/// Issue a standard HttpRequest::requestPost() call but using
/// and LLSD object as the request body.  Conventions are the
/// same as with that method.  Caller is expected to provide
/// an HttpHeaders object with a correct 'Content-Type:' header.
/// One will not be provided by this call.  You might look after
/// the 'Accept:' header as well.
///
/// @return				If request is successfully issued, the
///						HttpHandle representing the request.
///						On error, LLCORE_HTTP_HANDLE_INVALID
///						is returned and caller can fetch detailed
///						status with the getStatus() method on the
///						request object.  In case of error, no
///						request is queued and caller may need to
///						perform additional cleanup such as freeing
///						a now-useless HttpHandler object.
///
LLCore::HttpHandle requestPostWithLLSD(LLCore::HttpRequest * request,
    LLCore::HttpRequest::policy_t policy_id,
    const std::string & url,
    const LLSD & body,
    const LLCore::HttpOptions::ptr_t &options,
    const LLCore::HttpHeaders::ptr_t &headers,
    const LLCore::HttpHandler::ptr_t &handler);

inline LLCore::HttpHandle requestPostWithLLSD(LLCore::HttpRequest::ptr_t & request,
	LLCore::HttpRequest::policy_t policy_id,
	const std::string & url,
	const LLSD & body,
	const LLCore::HttpOptions::ptr_t & options,
	const LLCore::HttpHeaders::ptr_t & headers,
    const LLCore::HttpHandler::ptr_t & handler)
{
    return requestPostWithLLSD(request.get(), policy_id,
        url, body, options, headers, handler);
}

inline LLCore::HttpHandle requestPostWithLLSD(LLCore::HttpRequest::ptr_t & request,
    LLCore::HttpRequest::policy_t policy_id,
    const std::string & url,
    const LLSD & body,
    const LLCore::HttpHandler::ptr_t &handler)
{
    LLCore::HttpOptions::ptr_t options;
    LLCore::HttpHeaders::ptr_t headers;

    return requestPostWithLLSD(request.get(), policy_id,
        url, body, options, headers, handler);
}


/// Issue a standard HttpRequest::requestPut() call but using
/// and LLSD object as the request body.  Conventions are the
/// same as with that method.  Caller is expected to provide
/// an HttpHeaders object with a correct 'Content-Type:' header.
/// One will not be provided by this call.
///
/// @return				If request is successfully issued, the
///						HttpHandle representing the request.
///						On error, LLCORE_HTTP_HANDLE_INVALID
///						is returned and caller can fetch detailed
///						status with the getStatus() method on the
///						request object.  In case of error, no
///						request is queued and caller may need to
///						perform additional cleanup such as freeing
///						a now-useless HttpHandler object.
///
LLCore::HttpHandle requestPutWithLLSD(LLCore::HttpRequest * request,
	LLCore::HttpRequest::policy_t policy_id,
	const std::string & url,
	const LLSD & body,
	const LLCore::HttpOptions::ptr_t &options,
	const LLCore::HttpHeaders::ptr_t &headers,
    const LLCore::HttpHandler::ptr_t &handler);

inline LLCore::HttpHandle requestPutWithLLSD(LLCore::HttpRequest::ptr_t & request,
	LLCore::HttpRequest::policy_t policy_id,
	const std::string & url,
	const LLSD & body,
	const LLCore::HttpOptions::ptr_t & options,
	const LLCore::HttpHeaders::ptr_t & headers,
    LLCore::HttpHandler::ptr_t handler)
{
    return requestPutWithLLSD(request.get(), policy_id,
        url, body, options, headers, handler);
}

inline LLCore::HttpHandle requestPutWithLLSD(LLCore::HttpRequest::ptr_t & request,
    LLCore::HttpRequest::policy_t policy_id,
    const std::string & url,
    const LLSD & body,
    LLCore::HttpHandler::ptr_t handler)
{
    LLCore::HttpOptions::ptr_t options;
    LLCore::HttpHeaders::ptr_t headers;

    return requestPutWithLLSD(request.get(), policy_id,
        url, body, options, headers, handler);
}

/// Issue a standard HttpRequest::requestPatch() call but using
/// and LLSD object as the request body.  Conventions are the
/// same as with that method.  Caller is expected to provide
/// an HttpHeaders object with a correct 'Content-Type:' header.
/// One will not be provided by this call.
///
/// @return				If request is successfully issued, the
///						HttpHandle representing the request.
///						On error, LLCORE_HTTP_HANDLE_INVALID
///						is returned and caller can fetch detailed
///						status with the getStatus() method on the
///						request object.  In case of error, no
///						request is queued and caller may need to
///						perform additional cleanup such as freeing
///						a now-useless HttpHandler object.
///
LLCore::HttpHandle requestPatchWithLLSD(LLCore::HttpRequest * request,
    LLCore::HttpRequest::policy_t policy_id,
    const std::string & url,
    const LLSD & body,
    const LLCore::HttpOptions::ptr_t &options,
    const LLCore::HttpHeaders::ptr_t &headers,
    const LLCore::HttpHandler::ptr_t &handler);

inline LLCore::HttpHandle requestPatchWithLLSD(LLCore::HttpRequest::ptr_t & request,
    LLCore::HttpRequest::policy_t policy_id,
    const std::string & url,
    const LLSD & body,
    const LLCore::HttpOptions::ptr_t & options,
    const LLCore::HttpHeaders::ptr_t & headers,
    const LLCore::HttpHandler::ptr_t & handler)
{
    return requestPatchWithLLSD(request.get(), policy_id,
        url, body, options, headers, handler);
}

inline LLCore::HttpHandle requestPatchWithLLSD(LLCore::HttpRequest::ptr_t & request,
    LLCore::HttpRequest::policy_t policy_id,
    const std::string & url,
    const LLSD & body,
    const LLCore::HttpHandler::ptr_t &handler)
{
    LLCore::HttpOptions::ptr_t options;
    LLCore::HttpHeaders::ptr_t headers;

    return requestPatchWithLLSD(request.get(), policy_id,
        url, body, options, headers, handler);
}

//=========================================================================
/// The HttpCoroHandler is a specialization of the LLCore::HttpHandler for 
/// interacting with coroutines. When the request is completed the response 
/// will be posted onto the supplied Event Pump.
/// 
/// The LLSD posted back to the coroutine will have the following additions:
/// llsd["http_result"] -+- ["message"] - An error message returned from the HTTP status
///                      +- ["status"]  - The status code associated with the HTTP call
///                      +- ["success"] - Success of failure of the HTTP call and LLSD parsing.
///                      +- ["type"]    - The LLCore::HttpStatus type associted with the HTTP call
///                      +- ["url"]     - The URL used to make the call.
///                      +- ["headers"] - A map of name name value pairs with the HTTP headers.
///                      
class HttpCoroHandler : public LLCore::HttpHandler
{
public:

    typedef boost::shared_ptr<HttpCoroHandler>  ptr_t;
    typedef boost::weak_ptr<HttpCoroHandler>    wptr_t;

    HttpCoroHandler(LLEventStream &reply);

    static void writeStatusCodes(LLCore::HttpStatus status, const std::string &url, LLSD &result);

    virtual void onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response);

    inline LLEventStream &getReplyPump()
    {
        return mReplyPump;
    }

protected:
    /// this method may modify the status value
    virtual LLSD handleSuccess(LLCore::HttpResponse * response, LLCore::HttpStatus &status) = 0;
    virtual LLSD parseBody(LLCore::HttpResponse *response, bool &success) = 0;

private:
    void buildStatusEntry(LLCore::HttpResponse *response, LLCore::HttpStatus status, LLSD &result);

    LLEventStream &mReplyPump;
};

//=========================================================================
/// An adapter to handle some of the boilerplate code surrounding HTTP and coroutine 
/// interaction.
/// 
/// Construct an HttpCoroutineAdapter giving it a name and policy Id. After 
/// any application specific setup call the post, put or get method.  The request 
/// will be automatically pumped and the method will return with an LLSD describing
/// the result of the operation.  See HttpCoroHandler for a description of the 
/// decoration done to the returned LLSD.
/// 
/// Posting through the adapter will automatically add the following headers to 
/// the request if they have not been previously specified in a supplied 
/// HttpHeaders object:
///     "Accept=application/llsd+xml"
///     "X-SecondLife-UDP-Listen-Port=###"
///     
class HttpCoroutineAdapter
{
public:
    static const std::string HTTP_RESULTS;
    static const std::string HTTP_RESULTS_SUCCESS;
    static const std::string HTTP_RESULTS_TYPE;
    static const std::string HTTP_RESULTS_STATUS;
    static const std::string HTTP_RESULTS_MESSAGE;
    static const std::string HTTP_RESULTS_URL;
    static const std::string HTTP_RESULTS_HEADERS;
    static const std::string HTTP_RESULTS_CONTENT;
    static const std::string HTTP_RESULTS_RAW;

    typedef boost::shared_ptr<HttpCoroutineAdapter> ptr_t;
    typedef boost::weak_ptr<HttpCoroutineAdapter>   wptr_t;

    HttpCoroutineAdapter(const std::string &name, LLCore::HttpRequest::policy_t policyId);
    ~HttpCoroutineAdapter();

    /// Execute a Post transaction on the supplied URL and yield execution of 
    /// the coroutine until a result is available. 
    /// 
    /// @Note: the request's smart pointer is passed by value so that it will
    /// not be deallocated during the yield.
    LLSD postAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, const LLSD & body,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD postAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, LLCore::BufferArray::ptr_t rawbody,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));

    LLSD postAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const LLSD & body,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return postAndSuspend(request, url, body,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    LLSD postAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, LLCore::BufferArray::ptr_t &rawbody,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return postAndSuspend(request, url, rawbody,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    LLSD postRawAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, LLCore::BufferArray::ptr_t rawbody,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));

    LLSD postRawAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, LLCore::BufferArray::ptr_t &rawbody,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return postRawAndSuspend(request, url, rawbody,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    LLSD postFileAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, std::string fileName,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));

    LLSD postFileAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, std::string fileName,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return postFileAndSuspend(request, url, fileName,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }


    LLSD postFileAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, LLUUID assetId, LLAssetType::EType assetType,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));

    LLSD postFileAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, LLUUID assetId, LLAssetType::EType assetType,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return postFileAndSuspend(request, url, assetId, assetType,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    LLSD postJsonAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, const LLSD & body,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD postJsonAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const LLSD & body,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return postJsonAndSuspend(request, url, body,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }



    /// Execute a Put transaction on the supplied URL and yield execution of 
    /// the coroutine until a result is available.
    /// 
    /// @Note: the request's smart pointer is passed by value so that it will
    /// not be deallocated during the yield.
    LLSD putAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, const LLSD & body,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));

    LLSD putAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, const LLSD & body,
        LLCore::HttpHeaders::ptr_t headers)
    {
        return putAndSuspend(request, url, body,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    LLSD putJsonAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, const LLSD & body,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD putJsonAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const LLSD & body,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return putJsonAndSuspend(request, url, body,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    /// Execute a Get transaction on the supplied URL and yield execution of 
    /// the coroutine until a result is available.
    /// 
    /// @Note: the request's smart pointer is passed by value so that it will
    /// not be deallocated during the yield.
    /// 
    LLSD getAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD getAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, LLCore::HttpHeaders::ptr_t &headers)
    {
        return getAndSuspend(request, url,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
            headers);
    }

    LLSD getRawAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD getRawAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, LLCore::HttpHeaders::ptr_t &headers)
    {
        return getRawAndSuspend(request, url,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
            headers);
    }

    /// These methods have the same behavior as @getAndSuspend() however they are 
    /// expecting the server to return the results formatted in a JSON string. 
    /// On a successful GET call the JSON results will be converted into LLSD 
    /// before being returned to the caller.
    LLSD getJsonAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD getJsonAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, LLCore::HttpHeaders::ptr_t &headers)
    {
        return getJsonAndSuspend(request, url,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
            headers);
    }


    /// Execute a DELETE transaction on the supplied URL and yield execution of 
    /// the coroutine until a result is available.
    /// 
    /// @Note: the request's smart pointer is passed by value so that it will
    /// not be deallocated during the yield.
    LLSD deleteAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD deleteAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, LLCore::HttpHeaders::ptr_t headers)
    {
        return deleteAndSuspend(request, url,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
            headers);
    }

    /// These methods have the same behavior as @deleteAndSuspend() however they are 
    /// expecting the server to return any results formatted in a JSON string. 
    /// On a successful DELETE call the JSON results will be converted into LLSD 
    /// before being returned to the caller.
    LLSD deleteJsonAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD deleteJsonAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, LLCore::HttpHeaders::ptr_t headers)
    {
        return deleteJsonAndSuspend(request, url,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
            headers);
    }


    /// Execute a PATCH transaction on the supplied URL and yield execution of 
    /// the coroutine until a result is available. 
    /// 
    /// @Note: the request's smart pointer is passed by value so that it will
    /// not be deallocated during the yield.
    LLSD patchAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, const LLSD & body,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD patchAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const LLSD & body,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return patchAndSuspend(request, url, body,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    /// Execute a COPY transaction on the supplied URL and yield execution of 
    /// the coroutine until a result is available. 
    /// 
    /// @Note: The destination is passed through the HTTP pipe as a header
    /// The header used is defined as: HTTP_OUT_HEADER_DESTINATION("Destination");
    /// 
    /// @Note: the request's smart pointer is passed by value so that it will
    /// not be deallocated during the yield.
    LLSD copyAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, const std::string dest,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD copyAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const std::string & dest,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return copyAndSuspend(request, url, dest,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    /// Execute a MOVE transaction on the supplied URL and yield execution of 
    /// the coroutine until a result is available. 
    /// 
    /// @Note: The destination is passed through the HTTP pipe in the headers.
    /// The header used is defined as: HTTP_OUT_HEADER_DESTINATION("Destination");
    /// 
    /// @Note: the request's smart pointer is passed by value so that it will
    /// not be deallocated during the yield.
    LLSD moveAndSuspend(LLCore::HttpRequest::ptr_t request,
        const std::string & url, const std::string dest,
        LLCore::HttpOptions::ptr_t options = LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()),
        LLCore::HttpHeaders::ptr_t headers = LLCore::HttpHeaders::ptr_t(new LLCore::HttpHeaders()));
    LLSD moveAndSuspend(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const std::string & dest,
        LLCore::HttpHeaders::ptr_t &headers)
    {
        return moveAndSuspend(request, url, dest,
            LLCore::HttpOptions::ptr_t(new LLCore::HttpOptions()), headers);
    }

    ///
    void cancelSuspendedOperation();

    static LLCore::HttpStatus getStatusFromLLSD(const LLSD &httpResults);

    /// The convenience routines below can be provided with callback functors 
    /// which will be invoked in the case of success or failure.  These callbacks
    /// should match this form.
    /// @sa callbackHttpGet
    /// @sa callbackHttpPost
    typedef boost::function<void(const LLSD &)> completionCallback_t;

    static void callbackHttpGet(const std::string &url, LLCore::HttpRequest::policy_t policyId, completionCallback_t success = NULL, completionCallback_t failure = NULL);
    static void callbackHttpGet(const std::string &url, completionCallback_t success = NULL, completionCallback_t failure = NULL)
    {
        callbackHttpGet(url, LLCore::HttpRequest::DEFAULT_POLICY_ID, success, failure);
    }
    static void callbackHttpPost(const std::string &url, LLCore::HttpRequest::policy_t policyId, const LLSD &postData, completionCallback_t success = NULL, completionCallback_t failure = NULL);
    static void callbackHttpPost(const std::string &url, const LLSD &postData, completionCallback_t success = NULL, completionCallback_t failure = NULL)
    {
        callbackHttpPost(url, LLCore::HttpRequest::DEFAULT_POLICY_ID, postData, success, failure);
    }

    static void callbackHttpDel(const std::string &url, LLCore::HttpRequest::policy_t policyId, completionCallback_t success = NULL,
                            completionCallback_t failure = NULL);

    /// Generic Get and post routines for HTTP via coroutines.
    /// These static methods do all required setup for the GET or POST operation.
    /// When the operation completes successfully they will put the success message in the log at INFO level, 
    /// If the operation fails the failure message is written to the log at WARN level.
    /// 
    static void messageHttpGet(const std::string &url, const std::string &success = std::string(), const std::string &failure = std::string());
    static void messageHttpPost(const std::string &url, const LLSD &postData, const std::string &success, const std::string &failure);


private:
    static LLSD buildImmediateErrorResult(const LLCore::HttpRequest::ptr_t &request, const std::string &url);

    void saveState(LLCore::HttpHandle yieldingHandle, LLCore::HttpRequest::ptr_t &request,
            HttpCoroHandler::ptr_t &handler);
    void cleanState();

    LLSD postAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const LLSD & body,
        LLCore::HttpOptions::ptr_t &options, LLCore::HttpHeaders::ptr_t &headers,
        HttpCoroHandler::ptr_t &handler);

    LLSD postAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, LLCore::BufferArray::ptr_t &rawbody,
        LLCore::HttpOptions::ptr_t &options, LLCore::HttpHeaders::ptr_t &headers,
        HttpCoroHandler::ptr_t &handler);

    LLSD putAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const LLSD & body,
        LLCore::HttpOptions::ptr_t &options, LLCore::HttpHeaders::ptr_t &headers,
        HttpCoroHandler::ptr_t &handler);

    LLSD putAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const LLCore::BufferArray::ptr_t & rawbody,
        LLCore::HttpOptions::ptr_t &options, LLCore::HttpHeaders::ptr_t &headers,
        HttpCoroHandler::ptr_t &handler);

    LLSD getAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, LLCore::HttpOptions::ptr_t &options, 
        LLCore::HttpHeaders::ptr_t &headers, HttpCoroHandler::ptr_t &handler);

    LLSD deleteAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, LLCore::HttpOptions::ptr_t &options,
        LLCore::HttpHeaders::ptr_t &headers, HttpCoroHandler::ptr_t &handler);

    LLSD patchAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, const LLSD & body,
        LLCore::HttpOptions::ptr_t &options, LLCore::HttpHeaders::ptr_t &headers,
        HttpCoroHandler::ptr_t &handler);

    LLSD copyAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url, 
        LLCore::HttpOptions::ptr_t &options, LLCore::HttpHeaders::ptr_t &headers,
        HttpCoroHandler::ptr_t &handler);

    LLSD moveAndSuspend_(LLCore::HttpRequest::ptr_t &request,
        const std::string & url,
        LLCore::HttpOptions::ptr_t &options, LLCore::HttpHeaders::ptr_t &headers,
        HttpCoroHandler::ptr_t &handler);

    static void trivialGetCoro(std::string url, LLCore::HttpRequest::policy_t policyId, completionCallback_t success, completionCallback_t failure);
    static void trivialPostCoro(std::string url, LLCore::HttpRequest::policy_t policyId, LLSD postData, completionCallback_t success, completionCallback_t failure);
    static void trivialDelCoro(std::string url, LLCore::HttpRequest::policy_t policyId, completionCallback_t success, completionCallback_t failure);

    void checkDefaultHeaders(LLCore::HttpHeaders::ptr_t &headers);

    std::string                     mAdapterName;
    LLCore::HttpRequest::policy_t   mPolicyId;

    LLCore::HttpHandle              mYieldingHandle;
    LLCore::HttpRequest::wptr_t     mWeakRequest;
    HttpCoroHandler::wptr_t         mWeakHandler;
};


} // end namespace LLCoreHttpUtil

#endif // LL_LLCOREHTTPUTIL_H