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
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
|
/* -*- Mode: c; c-basic-offset: 2 -*-
*
* raptor_grddl.c - Raptor GRDDL Parser implementation
*
* Copyright (C) 2005-2007, David Beckett http://purl.org/net/dajobe/
* Copyright (C) 2005, University of Bristol, UK http://www.bristol.ac.uk/
*
* This package is Free Software and part of Redland http://librdf.org/
*
* It is licensed under the following three licenses as alternatives:
* 1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
* 2. GNU General Public License (GPL) V2 or any newer version
* 3. Apache License, V2.0 or any newer version
*
* You may not use this file except in compliance with at least one of
* the above three licenses.
*
* See LICENSE.html or LICENSE.txt at the top of this package for the
* complete terms and further detail along with the license texts for
* the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
*
*/
/*
* Specification:
* Gleaning Resource Descriptions from Dialects of Languages (GRDDL)
* W3C Working Draft 2 March 2007
* http://www.w3.org/TR/2007/WD-grddl-20070302/
* http://www.w3.org/TR/grddl/
*/
#ifdef HAVE_CONFIG_H
#include <raptor_config.h>
#endif
#ifdef WIN32
#include <win32_raptor_config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdarg.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
/* Raptor includes */
#include "raptor.h"
#include "raptor_internal.h"
#include <libxml/xpath.h>
/* for xmlXPathRegisterNs() */
#include <libxml/xpathInternals.h>
#include <libxml/xinclude.h>
#include <libxslt/xslt.h>
#include <libxslt/transform.h>
#include <libxslt/xsltutils.h>
/*
* libxslt API notes
*
* Inputs to an XSLT transformation process with libxslt are:
* 1. A set of (key:value) parameters.
* 2. An xsltStylesheetPtr for the XSLT sheet
* Which could be made from a file or an xmlDoc; and the xmlDoc.
* made from a file or memory buffer.
* 3. An xmlDoc for the XML source
* Which could be made from a file or a memory buffer.
*
*/
static void raptor_grddl_filter_triples(void *user_data, const raptor_statement *statement);
static void raptor_libxslt_error_common(raptor_parser* rdf_parser, const char *msg, va_list args, const char *prefix) RAPTOR_PRINTF_FORMAT(2, 0);
static void raptor_grddl_xsltGenericError_handler(void *user_data, const char *msg, ...) RAPTOR_PRINTF_FORMAT(2, 0);
/*
* XSLT parser object
*/
struct raptor_grddl_parser_context_s {
raptor_parser* rdf_parser;
xmlSAXHandler sax;
/* XML document ctxt */
xmlParserCtxtPtr ctxt;
/* Create xpath evaluation context */
xmlXPathContextPtr xpathCtx;
/* parser for dealing with the result */
raptor_parser* internal_parser;
/* ... constructed with this name */
const char* internal_parser_name;
/* sax2 structure - only for recording error pointers */
raptor_sax2* sax2;
/* URI of root namespace of document */
raptor_uri* root_ns_uri;
/* List of transformation URIs for document */
raptor_sequence* doc_transform_uris;
/* Copy of the user data statement_handler overwritten to point to
* raptor_grddl_filter_triples()
*/
void* saved_user_data;
raptor_statement_handler saved_statement_handler;
/* URI data-view:namespaceTransformation */
raptor_uri* namespace_transformation_uri;
/* URI data-view:profileTransformation */
raptor_uri* profile_transformation_uri;
/* List of namespace / <head profile> URIs */
raptor_sequence* profile_uris;
/* List of visited URIs */
raptor_sequence* visited_uris;
/* Depth of GRDDL parsers - 0 means that the lists above
* are owned by this parser: visited_uris
* */
int grddl_depth;
};
typedef struct raptor_grddl_parser_context_s raptor_grddl_parser_context;
static void
raptor_libxslt_error_common(raptor_parser* rdf_parser,
const char *msg, va_list args,
const char *prefix)
{
int prefix_length=strlen(prefix);
int length;
char *nmsg;
length=prefix_length+strlen(msg)+1;
nmsg=(char*)RAPTOR_MALLOC(cstring, length);
if(nmsg) {
strcpy(nmsg, prefix);
strcpy(nmsg+prefix_length, msg);
if(nmsg[length-1]=='\n')
nmsg[length-1]='\0';
}
raptor_parser_error_varargs(rdf_parser,
nmsg ? nmsg : msg,
args);
if(nmsg)
RAPTOR_FREE(cstring,nmsg);
}
static void
raptor_grddl_xsltGenericError_handler(void *user_data, const char *msg, ...)
{
raptor_parser* rdf_parser=(raptor_parser*)user_data;
va_list arguments;
if(!msg || *msg == '\n')
return;
va_start(arguments, msg);
raptor_libxslt_error_common(rdf_parser, msg, arguments, "libxslt error: ");
va_end(arguments);
}
static int
raptor_grddl_parse_init(raptor_parser* rdf_parser, const char *name)
{
raptor_grddl_parser_context* grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
grddl_parser->rdf_parser=rdf_parser;
/* sax2 structure - only for recording error pointers */
grddl_parser->sax2=raptor_new_sax2(rdf_parser, &rdf_parser->error_handlers);
/* The following error fields are normally initialised by
* raptor_libxml_init() via raptor_sax2_parse_start() which is
* not used here as we go to libxml calls direct.
*/
raptor_libxml_init_sax_error_handlers(&grddl_parser->sax);
raptor_libxml_init_generic_error_handlers(grddl_parser->sax2);
/* Sequence of URIs of XSLT sheets to transform the document */
grddl_parser->doc_transform_uris=raptor_new_sequence((raptor_sequence_free_handler*)raptor_free_uri, (raptor_sequence_print_handler*)raptor_sequence_print_uri);
/* Sequence of URIs from <head profile> */
grddl_parser->profile_uris=raptor_new_sequence((raptor_sequence_free_handler*)raptor_free_uri, (raptor_sequence_print_handler*)raptor_sequence_print_uri);
grddl_parser->namespace_transformation_uri=raptor_new_uri((const unsigned char*)"http://www.w3.org/2003/g/data-view#namespaceTransformation");
grddl_parser->profile_transformation_uri=raptor_new_uri((const unsigned char*)"http://www.w3.org/2003/g/data-view#profileTransformation");
/* Sequence of URIs visited - may be overwritten if this is not
* the depth 0 grddl parser
*/
grddl_parser->visited_uris=raptor_new_sequence((raptor_sequence_free_handler*)raptor_free_uri, (raptor_sequence_print_handler*)raptor_sequence_print_uri);
return 0;
}
static void
raptor_grddl_parse_terminate(raptor_parser *rdf_parser)
{
raptor_grddl_parser_context *grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
if(grddl_parser->ctxt) {
if(grddl_parser->ctxt->myDoc) {
xmlFreeDoc(grddl_parser->ctxt->myDoc);
grddl_parser->ctxt->myDoc=NULL;
}
xmlFreeParserCtxt(grddl_parser->ctxt);
}
if(grddl_parser->xpathCtx)
xmlXPathFreeContext(grddl_parser->xpathCtx);
if(grddl_parser->internal_parser)
raptor_free_parser(grddl_parser->internal_parser);
if(grddl_parser->sax2)
raptor_free_sax2(grddl_parser->sax2);
if(grddl_parser->root_ns_uri)
raptor_free_uri(grddl_parser->root_ns_uri);
if(grddl_parser->doc_transform_uris)
raptor_free_sequence(grddl_parser->doc_transform_uris);
if(grddl_parser->profile_uris)
raptor_free_sequence(grddl_parser->profile_uris);
if(grddl_parser->namespace_transformation_uri)
raptor_free_uri(grddl_parser->namespace_transformation_uri);
if(grddl_parser->profile_transformation_uri)
raptor_free_uri(grddl_parser->profile_transformation_uri);
if(!grddl_parser->grddl_depth) {
if(grddl_parser->visited_uris)
raptor_free_sequence(grddl_parser->visited_uris);
}
}
static void
raptor_grddl_parser_add_parent(raptor_parser *rdf_parser,
raptor_grddl_parser_context* parent_grddl_parser)
{
raptor_grddl_parser_context* grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
/* Do not set parent twice */
if(grddl_parser->visited_uris == parent_grddl_parser->visited_uris)
return;
/* free any sequence here */
if(grddl_parser->visited_uris)
raptor_free_sequence(grddl_parser->visited_uris);
/* share parent's list and do not free it here */
grddl_parser->visited_uris= parent_grddl_parser->visited_uris;
grddl_parser->grddl_depth= parent_grddl_parser->grddl_depth+1;
grddl_parser->saved_user_data= parent_grddl_parser->rdf_parser;
grddl_parser->saved_statement_handler= raptor_grddl_filter_triples;
}
static int
raptor_grddl_parse_start(raptor_parser *rdf_parser)
{
raptor_locator *locator=&rdf_parser->locator;
locator->line=1;
return 0;
}
#define MATCH_IS_VALUE_LIST 1
#define MATCH_IS_PROFILE 2
static struct {
const xmlChar* xpath;
int flags;
const xmlChar* xslt_sheet_uri;
} match_table[]={
/* XHTML document where the GRDDL profile is in
* <link ref='transform' href='url'> inside the html <head>
*/
{
(const xmlChar*)"/html:html/html:head[contains(@profile,\"http://www.w3.org/2003/g/data-view\")]/html:link[@rel=\"transformation\"]/@href",
0,
NULL
}
,
/* XHTML document where the GRDDL profile is in
* <a rel='transform' href='url'> inside the html <body>
*/
{
(const xmlChar*)"/html:html/html:head[contains(@profile,\"http://www.w3.org/2003/g/data-view\")]/../..//html:a[@rel=\"transformation\"]/@href",
0,
NULL
}
,
/* XML document linking to transform via attribute dataview:transformation
* Example: http://www.w3.org/2004/01/rdxh/grddl-p3p-example
**/
{
(const xmlChar*)"//@dataview:transformation",
MATCH_IS_VALUE_LIST,
NULL
}
,
#if 0
/* FIXME Disabled. This returns the wrong namespaces in
* Id: dc-extract.xsl,v 1.10 2005/09/07 17:10:06 connolly Exp
*/
/* Dublin Core in <meta> tags http://dublincore.org/documents/dcq-html/ */
{
(const xmlChar*)"/html:html/html:head/html:link[@href=\"http://purl.org/dc/elements/1.1/\"]",
0,
(const xmlChar*)"http://www.w3.org/2000/06/dc-extract/dc-extract.xsl"
}
,
#endif
#if 0
/* Embedded RDF
* <head profile="http://purl.org/NET/erdf/profile"> inside <html>
*/
{
(const xmlChar*)"/html:html/html:head[contains(@profile,\"http://purl.org/NET/erdf/profile\")]",
0,
(const xmlChar*)"http://purl.org/NET/erdf/extract-rdf.xsl"
}
,
#endif
#if 0
/* hCalendar microformat http://microformats.org/wiki/hcalendar */
{
(const xmlChar*)"//*[@class=\"vevent\"]",
0,
(const xmlChar*)"http://www.w3.org/2002/12/cal/glean-hcal.xsl"
}
,
#endif
{
NULL,
0,
0
}
};
static const char* grddl_namespace_uris_ignore_list[]={
"http://www.w3.org/1999/xhtml",
"http://www.w3.org/1999/02/22-rdf-syntax-ns#",
"http://www.w3.org/2001/XMLSchema",
NULL
};
static void
raptor_grddl_filter_triples(void *user_data, const raptor_statement *statement)
{
raptor_parser* rdf_parser=(raptor_parser*)user_data;
raptor_grddl_parser_context* grddl_parser;
int i;
raptor_uri* predicate_uri;
grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
/* Look for a triple <uri> <uri> <uri> */
if(!statement->subject_type == RAPTOR_IDENTIFIER_TYPE_RESOURCE ||
!statement->predicate_type == RAPTOR_IDENTIFIER_TYPE_RESOURCE ||
!statement->object_type == RAPTOR_IDENTIFIER_TYPE_RESOURCE)
return;
#if RAPTOR_DEBUG > 2
RAPTOR_DEBUG2("Parser %p: Relaying statement: ", rdf_parser);
raptor_print_statement(statement, stderr);
fputc('\n', stderr);
#endif
#if RAPTOR_DEBUG > 1
RAPTOR_DEBUG3("Parser %p: Checking against %d profile URIs\n",
rdf_parser, raptor_sequence_size(grddl_parser->profile_uris));
#endif
/* Look for (i=0, root namespace URI)
* <document-root-element-namespace-URI> data-view:namespaceTransformation ?tr
* or (i>0, profile URIs)
* <document-root-element-namespace-URI> data-view:profileTransformation ?tr
* and then ?tr becomes a new document transformation URI
*/
predicate_uri=grddl_parser->namespace_transformation_uri;
for(i=0; i < raptor_sequence_size(grddl_parser->profile_uris); i++) {
raptor_uri* profile_uri=raptor_sequence_get_at(grddl_parser->profile_uris, i);
if(i==1)
predicate_uri=grddl_parser->profile_transformation_uri;
if(!profile_uri)
continue;
if(raptor_uri_equals((raptor_uri*)statement->subject, profile_uri) &&
raptor_uri_equals((raptor_uri*)statement->predicate, predicate_uri)) {
raptor_uri* uri=(raptor_uri*)statement->object;
#if RAPTOR_DEBUG > 1
RAPTOR_DEBUG4("Parser %p: Matches profile URI #%d '%s'\n",
rdf_parser, i, raptor_uri_as_string(profile_uri));
#endif
/* add object as URI to transformation URI*/
RAPTOR_DEBUG2("Found document transformation URI '%s'\n",
raptor_uri_as_string(uri));
raptor_sequence_push(grddl_parser->doc_transform_uris,
raptor_uri_copy(uri));
} else {
#if RAPTOR_DEBUG > 1
RAPTOR_DEBUG4("Parser %p: Failed to match profile URI #%d '%s'\n",
rdf_parser, i, raptor_uri_as_string(profile_uri));
#endif
}
}
}
static int
raptor_grddl_ensure_internal_parser(raptor_parser* rdf_parser,
const char* parser_name, int filter)
{
raptor_grddl_parser_context* grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
if(!grddl_parser->internal_parser_name ||
strcmp(grddl_parser->internal_parser_name, parser_name)) {
/* construct a new parser if none in use or not what is required */
if(grddl_parser->internal_parser) {
RAPTOR_DEBUG2("Freeing internal %s parser.\n",
grddl_parser->internal_parser_name);
raptor_free_parser(grddl_parser->internal_parser);
grddl_parser->internal_parser=NULL;
grddl_parser->internal_parser_name=NULL;
}
RAPTOR_DEBUG2("Allocating new internal %s parser.\n", parser_name);
grddl_parser->internal_parser=raptor_new_parser(parser_name);
if(!grddl_parser->internal_parser) {
raptor_parser_error(rdf_parser, "Failed to create %s parser",
parser_name);
return 1;
} else {
/* initialise the new parser with the outer state */
grddl_parser->internal_parser_name=parser_name;
raptor_parser_copy_user_state(grddl_parser->internal_parser,
rdf_parser);
grddl_parser->saved_user_data=rdf_parser->user_data;
grddl_parser->saved_statement_handler=rdf_parser->statement_handler;
}
}
/* Filter the triples for profile/namespace URIs */
if(filter) {
grddl_parser->internal_parser->user_data= rdf_parser;
grddl_parser->internal_parser->statement_handler= raptor_grddl_filter_triples;
} else {
grddl_parser->internal_parser->user_data= grddl_parser->saved_user_data;
grddl_parser->internal_parser->statement_handler= grddl_parser->saved_statement_handler;
}
return 0;
}
/* Run a GRDDL transform using a pre-parsed XSLT stylesheet already
* formed into a libxml document (with URI)
*/
static int
raptor_grddl_run_grddl_transform_doc(raptor_parser* rdf_parser,
raptor_uri* xslt_uri, xmlDocPtr xslt_doc,
xmlDocPtr doc)
{
raptor_grddl_parser_context* grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
int ret=0;
xsltStylesheetPtr sheet=NULL;
xmlDocPtr res=NULL;
xmlChar *doc_txt=NULL;
int doc_txt_len=0;
const char* parser_name;
const char* params[5];
const unsigned char* base_uri_string;
size_t base_uri_len;
char *quoted_base_uri=NULL;
base_uri_string=raptor_uri_as_counted_string(rdf_parser->base_uri,
&base_uri_len);
RAPTOR_DEBUG3("Running GRDDL transform with XSLT URI '%s' on doc URI '%s'\n",
raptor_uri_as_string(xslt_uri),
base_uri_string);
sheet = xsltParseStylesheetDoc(xslt_doc);
if(!sheet) {
raptor_parser_error(rdf_parser, "Failed to parse stylesheet in '%s'",
raptor_uri_as_string(xslt_uri));
ret=1;
goto cleanup_xslt;
}
xsltSetGenericErrorFunc(rdf_parser, raptor_grddl_xsltGenericError_handler);
#if 1
/* FIXME:
* Define 'base' and 'Base' params to allow some XSLT sheets to work:
* http://www.w3.org/2000/07/uri43/uri.xsl
* http://www.w3.org/2000/08/w3c-synd/home2rss.xsl
*/
quoted_base_uri=RAPTOR_MALLOC(cstring, base_uri_len+3);
quoted_base_uri[0]='\'';
strncpy(quoted_base_uri+1, (const char*)base_uri_string, base_uri_len);
quoted_base_uri[base_uri_len+1]='\'';
quoted_base_uri[base_uri_len+2]='\0';
params[0]="base";
params[1]=(const char*)quoted_base_uri;
params[2]="Base";
params[3]=(const char*)quoted_base_uri;
params[4]=NULL;
res = xsltApplyStylesheet(sheet, doc, params);
#else
res = xsltApplyStylesheet(sheet, doc, NULL); /* No params */
#endif
if(!res) {
raptor_parser_error(rdf_parser, "Failed to apply stylesheet in '%s'",
raptor_uri_as_string(xslt_uri));
ret=1;
goto cleanup_xslt;
}
if(res->type == XML_HTML_DOCUMENT_NODE) {
if(sheet->method != NULL)
xmlFree(sheet->method);
sheet->method = xmlMalloc(5);
strncpy((char*)sheet->method, "html", 5);
}
/* write the resulting XML to a string */
xsltSaveResultToString(&doc_txt, &doc_txt_len, res, sheet);
if(!doc_txt || !doc_txt_len) {
/* FIXME: continue with an empty document? */
raptor_parser_warning(rdf_parser, "XSLT returned an empty document");
goto cleanup_xslt;
}
RAPTOR_DEBUG4("XSLT returned %d bytes document method %s media type %s\n",
doc_txt_len,
(sheet->method ? (const char*)sheet->method : "NULL"),
(sheet->mediaType ? (const char*)sheet->mediaType : "NULL"));
/* FIXME: Assumes mime types for XSLT <xsl:output method> */
if(sheet->mediaType == NULL && sheet->method) {
if(!(strcmp((const char*)sheet->method, "text"))) {
sheet->mediaType = xmlMalloc(11);
strncpy((char*)sheet->mediaType, "text/plain",11);
} else if(!(strcmp((const char*)sheet->method, "xml"))) {
sheet->mediaType = xmlMalloc(16);
strncpy((char*)sheet->mediaType, "application/xml",16);
} else if(!(strcmp((const char*)sheet->method, "html"))) {
sheet->mediaType = xmlMalloc(10);
/* FIXME: use xhtml mime type? */
strncpy((char*)sheet->mediaType, "text/html",10);
}
}
/* FIXME: Assume all that all media XML is RDF/XML and also that
* with no information at all we have RDF/XML
*/
if(!sheet->mediaType ||
(sheet->mediaType &&
!strcmp((const char*)sheet->mediaType, "application/xml"))) {
if(sheet->mediaType)
xmlFree(sheet->mediaType);
sheet->mediaType = xmlMalloc(20);
strncpy((char*)sheet->mediaType, "application/rdf+xml",20);
}
parser_name=raptor_guess_parser_name(NULL, (const char*)sheet->mediaType,
doc_txt, doc_txt_len, NULL);
RAPTOR_DEBUG3("Guessed parser %s from mime type '%s'\n",
parser_name, sheet->mediaType);
if(!strcmp((const char*)parser_name, "grddl")) {
RAPTOR_DEBUG1("Ignoring guess to run grddl parser.");
goto cleanup_xslt;
}
ret=raptor_grddl_ensure_internal_parser(rdf_parser, parser_name, 0);
if(ret)
goto cleanup_xslt;
if(grddl_parser->internal_parser) {
/* generate the triples */
raptor_start_parse(grddl_parser->internal_parser, rdf_parser->base_uri);
raptor_parse_chunk(grddl_parser->internal_parser, doc_txt, doc_txt_len, 1);
}
cleanup_xslt:
if(quoted_base_uri)
RAPTOR_FREE(cstring, quoted_base_uri);
if(doc_txt)
xmlFree(doc_txt);
if(res)
xmlFreeDoc(res);
if(sheet)
xsltFreeStylesheet(sheet);
return ret;
}
typedef struct
{
raptor_parser* rdf_parser;
xmlParserCtxtPtr xc;
} raptor_grddl_xml_parse_bytes_context;
static void
raptor_grddl_uri_xml_parse_bytes(raptor_www* www,
void *userdata,
const void *ptr, size_t size, size_t nmemb)
{
raptor_grddl_xml_parse_bytes_context* xpbc=(raptor_grddl_xml_parse_bytes_context*)userdata;
int len=size*nmemb;
int rc=0;
if(!xpbc->xc) {
xmlParserCtxtPtr xc;
xc = xmlCreatePushParserCtxt(NULL, NULL,
(const char*)ptr, len,
(const char*)raptor_uri_as_string(www->uri));
if(!xc)
rc=1;
else {
int libxml_options = 0;
#ifdef XML_PARSE_NONET
if(xpbc->rdf_parser->features[RAPTOR_FEATURE_NO_NET])
libxml_options |= XML_PARSE_NONET;
#endif
#ifdef HAVE_XMLCTXTUSEOPTIONS
xmlCtxtUseOptions(xc, libxml_options);
#endif
xc->replaceEntities = 1;
xc->loadsubset = 1;
}
xpbc->xc=xc;
} else
rc=xmlParseChunk(xpbc->xc, (const char*)ptr, len, 0);
if(rc)
raptor_parser_error(xpbc->rdf_parser, "XML Parsing failed");
}
static int
raptor_grddl_fetch_uri(raptor_parser* rdf_parser,
raptor_uri* uri,
raptor_www_write_bytes_handler write_bytes_handler,
void* write_bytes_user_data,
raptor_www_content_type_handler content_type_handler,
void* content_type_user_data)
{
raptor_www *www;
const char *accept_h;
int ret=0;
if(rdf_parser->features[RAPTOR_FEATURE_NO_NET])
return 1;
www=raptor_www_new();
if(!www)
return 1;
raptor_www_set_user_agent(www, "grddl/0.1");
accept_h=raptor_parser_get_accept_header(rdf_parser);
if(accept_h) {
raptor_www_set_http_accept(www, accept_h);
RAPTOR_FREE(cstring, accept_h);
}
if(rdf_parser->uri_filter)
raptor_www_set_uri_filter(www, rdf_parser->uri_filter,
rdf_parser->uri_filter_user_data);
raptor_www_set_error_handler(www, rdf_parser->error_handlers.error_handler,
rdf_parser->error_handlers.error_user_data);
raptor_www_set_write_bytes_handler(www, write_bytes_handler,
write_bytes_user_data);
if(content_type_handler)
raptor_www_set_content_type_handler(www, content_type_handler,
content_type_user_data);
ret=raptor_www_fetch(www, uri);
raptor_www_free(www);
return ret;
}
/* Run a GRDDL transform using a XSLT stylesheet at a given URI */
static int
raptor_grddl_run_grddl_transform_uri(raptor_parser* rdf_parser,
raptor_uri* xslt_uri, xmlDocPtr doc)
{
raptor_grddl_parser_context* grddl_parser;
xmlParserCtxtPtr xslt_ctxt=NULL;
raptor_grddl_xml_parse_bytes_context xpbc;
int ret=0;
grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
RAPTOR_DEBUG2("Running GRDDL transform with XSLT URI '%s'\n",
raptor_uri_as_string(xslt_uri));
/* make an xsltStylesheetPtr via the raptor_grddl_uri_xml_parse_bytes
* callback as bytes are returned
*/
xpbc.xc=NULL;
xpbc.rdf_parser=rdf_parser;
ret=raptor_grddl_fetch_uri(rdf_parser,
xslt_uri,
raptor_grddl_uri_xml_parse_bytes,
&xpbc,
NULL, NULL);
if(ret) {
raptor_parser_warning(rdf_parser, "Fetching XSLT document URI '%s' failed",
raptor_uri_as_string(xslt_uri));
ret=0;
} else {
xslt_ctxt=xpbc.xc;
xmlParseChunk(xpbc.xc, NULL, 0, 1);
ret=raptor_grddl_run_grddl_transform_doc(rdf_parser,
xslt_uri, xslt_ctxt->myDoc,
doc);
}
if(xslt_ctxt)
xmlFreeParserCtxt(xslt_ctxt);
return ret;
}
static int
raptor_grddl_seen_uri(raptor_grddl_parser_context* grddl_parser,
raptor_uri* uri)
{
int i;
int seen=0;
raptor_sequence* seq=grddl_parser->visited_uris;
for(i=0; i < raptor_sequence_size(seq); i++) {
raptor_uri* vuri=(raptor_uri*)raptor_sequence_get_at(seq, i);
if(raptor_uri_equals(uri, vuri)) {
seen=1;
break;
}
}
if(seen)
RAPTOR_DEBUG2("Already seen URI '%s'\n", raptor_uri_as_string(uri));
return seen;
}
static void
raptor_grddl_done_uri(raptor_grddl_parser_context* grddl_parser,
raptor_uri* uri)
{
if(!raptor_grddl_seen_uri(grddl_parser, uri)) {
raptor_sequence* seq=grddl_parser->visited_uris;
raptor_sequence_push(seq, raptor_uri_copy(uri));
}
}
static void
raptor_grddl_parse_uri_write_bytes(raptor_www* www,
void *userdata, const void *ptr,
size_t size, size_t nmemb)
{
raptor_parser* rdf_parser=(raptor_parser*)userdata;
int len=size*nmemb;
if(raptor_parse_chunk(rdf_parser, (unsigned char*)ptr, len, 0))
raptor_www_abort(www, "Parsing failed");
}
static raptor_sequence*
raptor_grddl_run_xpath_match(raptor_parser* rdf_parser,
xmlDocPtr doc,
const xmlChar* xpathExpr,
int flags)
{
raptor_grddl_parser_context* grddl_parser;
/* Evaluate xpath expression */
xmlXPathObjectPtr xpathObj=NULL;
raptor_sequence* seq=NULL;
xmlNodeSetPtr nodes;
int i;
grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
seq=raptor_new_sequence((raptor_sequence_free_handler*)raptor_free_uri, (raptor_sequence_print_handler*)raptor_sequence_print_uri);
/* Evaluate xpath expression */
xpathObj = xmlXPathEvalExpression(xpathExpr,
grddl_parser->xpathCtx);
if(!xpathObj) {
raptor_parser_error(rdf_parser,
"Unable to evaluate XPath expression \"%s\"",
xpathExpr);
raptor_free_sequence(seq); seq=NULL;
goto cleanup_xpath_match;
}
nodes=xpathObj->nodesetval;
if(!nodes || xmlXPathNodeSetIsEmpty(nodes)) {
#if RAPTOR_DEBUG > 1
RAPTOR_DEBUG3("No match found with XPath expression \"%s\" over '%s'\n",
xpathExpr, raptor_uri_as_string(rdf_parser->base_uri));
#endif
raptor_free_sequence(seq); seq=NULL;
goto cleanup_xpath_match;
}
#if RAPTOR_DEBUG > 1
RAPTOR_DEBUG3("Found match with XPath expression \"%s\" over '%s'\n",
xpathExpr, raptor_uri_as_string(rdf_parser->base_uri));
#endif
for(i=0; i < xmlXPathNodeSetGetLength(nodes); i++) {
xmlNodePtr node=nodes->nodeTab[i];
const unsigned char* uri_string;
xmlChar *base_uri_string;
raptor_uri* base_uri=NULL;
raptor_uri* uri=NULL;
if(node->type != XML_ATTRIBUTE_NODE &&
node->type != XML_ELEMENT_NODE) {
raptor_parser_error(rdf_parser, "Got unexpected node type %d",
node->type);
continue;
}
/* returns base URI or NULL - must be freed with xmlFree() */
base_uri_string=xmlNodeGetBase(doc, node);
if(node->type == XML_ATTRIBUTE_NODE)
uri_string=(const unsigned char*)node->children->content;
else /* XML_ELEMENT_NODE */
uri_string=(const unsigned char*)node->ns->href;
if(base_uri_string) {
base_uri=raptor_new_uri(base_uri_string);
xmlFree(base_uri_string);
#if RAPTOR_DEBUG > 1
RAPTOR_DEBUG2("XML base URI of match is '%s'\n", raptor_uri_as_string(base_uri));
#endif
} else if(rdf_parser->base_uri)
base_uri=raptor_uri_copy(rdf_parser->base_uri);
else
base_uri=NULL;
if(flags & MATCH_IS_VALUE_LIST) {
char *start;
char *end;
char* buffer;
size_t list_len=strlen((const char*)uri_string);
buffer=(char*)RAPTOR_MALLOC(cstring, list_len+1);
strncpy(buffer, (const char*)uri_string, list_len+1);
for(start=end=buffer; end; start=end+1) {
end=strchr(start, ' ');
if(end)
*end='\0';
if(start == end)
continue;
#if RAPTOR_DEBUG
RAPTOR_DEBUG2("Got list match URI '%s'\n", start);
#endif
uri=raptor_new_uri_relative_to_base(base_uri,
(const unsigned char*)start);
if(flags & MATCH_IS_PROFILE &&
!strcmp((const char*)raptor_uri_as_string(uri),
"http://www.w3.org/2003/g/data-view'")) {
raptor_free_uri(uri);
continue;
}
raptor_sequence_push(seq, uri);
}
RAPTOR_FREE(cstring, buffer);
} else {
#if RAPTOR_DEBUG
RAPTOR_DEBUG2("Got single match URI '%s'\n", uri_string);
#endif
uri=raptor_new_uri_relative_to_base(base_uri, uri_string);
raptor_sequence_push(seq, uri);
}
if(base_uri)
raptor_free_uri(base_uri);
}
cleanup_xpath_match:
if(xpathObj)
xmlXPathFreeObject(xpathObj);
return seq;
}
static void
raptor_grddl_check_rdf_content_type_handler(raptor_www* www, void* userdata,
const char* content_type)
{
if(content_type && !strncmp(content_type, "application/rdf+xml", 19)) {
raptor_parser* rdf_parser=(raptor_parser*)userdata;
RAPTOR_DEBUG1("Found RDF/XML content type\n");
raptor_parser_save_content(rdf_parser, 1);
}
}
static int
raptor_grddl_run_recursive(raptor_parser* rdf_parser, raptor_uri* uri,
int allow_rdf)
{
raptor_grddl_parser_context* grddl_parser;
raptor_www_content_type_handler content_type_handler=NULL;
const char *parser_name="grddl";
grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
if(raptor_grddl_seen_uri(grddl_parser, uri))
return 0;
if(allow_rdf)
content_type_handler=raptor_grddl_check_rdf_content_type_handler;
if(raptor_grddl_ensure_internal_parser(rdf_parser, parser_name, 1))
return 1;
RAPTOR_DEBUG2("Running recursive GRDDL operation on URI '%s'\n",
raptor_uri_as_string(uri));
raptor_grddl_parser_add_parent(grddl_parser->internal_parser, grddl_parser);
if(raptor_start_parse(grddl_parser->internal_parser, uri))
return 1;
if(raptor_grddl_fetch_uri(grddl_parser->internal_parser,
uri,
raptor_grddl_parse_uri_write_bytes,
grddl_parser->internal_parser,
content_type_handler,
grddl_parser->internal_parser)) {
raptor_parser_warning(rdf_parser,
"Fetching GRDDL document URI '%s' failed\n",
raptor_uri_as_string(uri));
return 0;
}
raptor_parse_chunk(grddl_parser->internal_parser, NULL, 0, 1);
return 0;
}
static int
raptor_grddl_parse_chunk(raptor_parser* rdf_parser,
const unsigned char *s, size_t len,
int is_end)
{
raptor_grddl_parser_context* grddl_parser=(raptor_grddl_parser_context*)rdf_parser->context;
int i;
int ret=0;
const unsigned char* uri_string;
raptor_uri* uri;
/* XML document DOM */
xmlDocPtr doc;
int expri;
if(!grddl_parser->ctxt) {
uri_string=raptor_uri_as_string(rdf_parser->base_uri);
/* first time, so init context with first read bytes */
grddl_parser->ctxt = xmlCreatePushParserCtxt(NULL, NULL,
(const char*)s, len,
(const char*)uri_string);
if(!grddl_parser->ctxt) {
raptor_parser_error(rdf_parser, "Failed to create XML parser");
return 1;
}
grddl_parser->ctxt->replaceEntities = 1;
grddl_parser->ctxt->loadsubset = 1;
xmlSetStructuredErrorFunc(&rdf_parser->error_handlers,
raptor_libxml_xmlStructuredErrorFunc);
if(is_end)
xmlParseChunk(grddl_parser->ctxt, (const char*)s, 0, is_end);
} else if((s && len) || is_end)
xmlParseChunk(grddl_parser->ctxt, (const char*)s, len, is_end);
if(!is_end)
return 0;
raptor_grddl_done_uri(grddl_parser, rdf_parser->base_uri);
doc=grddl_parser->ctxt->myDoc;
if(!doc) {
raptor_parser_error(rdf_parser,
"Failed to create XML DOM for GRDDL document");
ret=1;
goto tidy;
}
RAPTOR_DEBUG3("Parser %p: Running XInclude processing on URI '%s'\n",
rdf_parser, raptor_uri_as_string(rdf_parser->base_uri));
if(xmlXIncludeProcess(doc) < 0) {
raptor_parser_error(rdf_parser,
"XInclude processing failed for GRDDL document");
ret=1;
goto tidy;
}
RAPTOR_DEBUG3("Parser %p: Running top-level GRDDL on URI '%s'\n",
rdf_parser, raptor_uri_as_string(rdf_parser->base_uri));
/* Work out if there is a root namespace URI */
if(1) {
xmlNodePtr xnp;
xmlNsPtr rootNs = NULL;
const unsigned char* ns_uri_string=NULL;
xnp = xmlDocGetRootElement(doc);
if(xnp) {
rootNs = xnp->ns;
if(rootNs)
ns_uri_string = (const unsigned char*)(rootNs->href);
}
if(ns_uri_string) {
int n;
RAPTOR_DEBUG2("Root namespace URI is %s\n", ns_uri_string);
for(n=0; grddl_namespace_uris_ignore_list[n]; n++) {
if(!strcmp(grddl_namespace_uris_ignore_list[n],
(const char*)ns_uri_string)) {
/* ignore this namespace */
RAPTOR_DEBUG2("Ignoring GRDDL for namespace URI '%s'\n",
ns_uri_string);
ns_uri_string=NULL;
break;
}
}
if(ns_uri_string) {
const unsigned char* buffer=NULL;
size_t buffer_len=0;
grddl_parser->root_ns_uri=raptor_new_uri_relative_to_base(rdf_parser->base_uri,
ns_uri_string);
raptor_sequence_push(grddl_parser->profile_uris,
raptor_uri_copy(grddl_parser->root_ns_uri));
RAPTOR_DEBUG3("Parser %p: Processing GRDDL namespace URI '%s'\n",
rdf_parser,
raptor_uri_as_string(grddl_parser->root_ns_uri));
raptor_grddl_run_recursive(rdf_parser, grddl_parser->root_ns_uri,
1);
if(grddl_parser->internal_parser) {
buffer=raptor_parser_get_content(grddl_parser->internal_parser,
&buffer_len);
if(buffer) {
if(raptor_grddl_ensure_internal_parser(rdf_parser, "rdfxml", 1))
ret=1;
else {
if(raptor_start_parse(grddl_parser->internal_parser,
rdf_parser->base_uri))
ret=1;
else
ret=raptor_parse_chunk(grddl_parser->internal_parser, buffer,
buffer_len, 1);
}
RAPTOR_FREE(cstring, buffer);
}
raptor_parser_save_content(grddl_parser->internal_parser, 0);
}
}
}
}
/* Always put something at the start of the list even if NULL
* so later it can be searched for in output triples
*/
if(!grddl_parser->root_ns_uri)
raptor_sequence_push(grddl_parser->profile_uris, NULL);
/* Create the XPath evaluation context */
if(!grddl_parser->xpathCtx) {
grddl_parser->xpathCtx = xmlXPathNewContext(doc);
if(!grddl_parser->xpathCtx) {
raptor_parser_error(rdf_parser,
"Failed to create XPath context for GRDDL document");
ret=1;
goto tidy;
}
xmlXPathRegisterNs(grddl_parser->xpathCtx,
(const xmlChar*)"html",
(const xmlChar*)"http://www.w3.org/1999/xhtml");
xmlXPathRegisterNs(grddl_parser->xpathCtx,
(const xmlChar*)"dataview",
(const xmlChar*)"http://www.w3.org/2003/g/data-view#");
}
/* Try <head profile> URIs */
if(1) {
raptor_sequence* result;
result=raptor_grddl_run_xpath_match(rdf_parser, doc,
(const xmlChar*)"/html:html/html:head/@profile",
MATCH_IS_VALUE_LIST | MATCH_IS_PROFILE);
if(result) {
RAPTOR_DEBUG4("Parser %p: Found %d <head profile> URIs in URI '%s'\n",
rdf_parser, raptor_sequence_size(result),
raptor_uri_as_string(rdf_parser->base_uri));
/* Store profile URIs, skipping NULLs or the GRDDL profile itself */
while(raptor_sequence_size(result)) {
uri=raptor_sequence_unshift(result);
if(!uri)
continue;
if(!strcmp("http://www.w3.org/2003/g/data-view",
(const char*)raptor_uri_as_string(uri))) {
RAPTOR_DEBUG3("Ignoring <head profile> of URI %s: URI %s\n",
raptor_uri_as_string(rdf_parser->base_uri),
raptor_uri_as_string(uri));
raptor_free_uri(uri);
continue;
}
raptor_sequence_push(grddl_parser->profile_uris, uri);
}
raptor_free_sequence(result);
/* Recursive GRDDL through all the <head profile> URIs */
for(i=1; i < raptor_sequence_size(grddl_parser->profile_uris); i++) {
uri=raptor_sequence_get_at(grddl_parser->profile_uris, i);
if(!uri)
continue;
RAPTOR_DEBUG4("Processing <head profile> #%d of URI %s: URI %s\n",
i, raptor_uri_as_string(rdf_parser->base_uri),
raptor_uri_as_string(uri));
ret=raptor_grddl_run_recursive(rdf_parser, uri, 0);
}
}
}
/* Try all XPaths */
for(expri=0; match_table[expri].xpath; expri++) {
raptor_sequence* result;
result=raptor_grddl_run_xpath_match(rdf_parser, doc,
match_table[expri].xpath,
match_table[expri].flags);
if(result) {
if(match_table[expri].xslt_sheet_uri) {
/* Ignore what matched, use a hardcoded XSLT URI */
uri_string=match_table[expri].xslt_sheet_uri;
RAPTOR_DEBUG2("Using hard-coded XSLT URI '%s'\n", uri_string);
uri=raptor_new_uri_relative_to_base(rdf_parser->base_uri, uri_string);
raptor_sequence_set_at(result, 0, uri);
}
raptor_sequence_join(grddl_parser->doc_transform_uris, result);
raptor_free_sequence(result);
}
if(rdf_parser->failed)
break;
} /* end XPath expression loop */
if(rdf_parser->failed) {
ret=1;
goto tidy;
}
/* Apply all transformation URIs seen */
while(raptor_sequence_size(grddl_parser->doc_transform_uris)) {
uri=raptor_sequence_unshift(grddl_parser->doc_transform_uris);
RAPTOR_DEBUG3("Parser %p: Running transformation URI '%s'\n",
rdf_parser, raptor_uri_as_string(uri));
ret=raptor_grddl_run_grddl_transform_uri(rdf_parser, uri, doc);
raptor_free_uri(uri);
if(ret)
break;
}
tidy:
if(grddl_parser->ctxt) {
if(grddl_parser->ctxt->myDoc) {
xmlFreeDoc(grddl_parser->ctxt->myDoc);
grddl_parser->ctxt->myDoc=NULL;
}
xmlFreeParserCtxt(grddl_parser->ctxt);
grddl_parser->ctxt=NULL;
}
if(grddl_parser->xpathCtx) {
xmlXPathFreeContext(grddl_parser->xpathCtx);
grddl_parser->xpathCtx=NULL;
}
return (ret != 0);
}
static int
raptor_grddl_parse_recognise_syntax(raptor_parser_factory* factory,
const unsigned char *buffer, size_t len,
const unsigned char *identifier,
const unsigned char *suffix,
const char *mime_type)
{
int score= 0;
if(suffix) {
if(!strcmp((const char*)suffix, "xhtml"))
score=7;
if(!strcmp((const char*)suffix, "html"))
score=2;
}
if(identifier) {
if(strstr((const char*)identifier, "xhtml"))
score+=5;
}
return score;
}
static void
raptor_grddl_parser_register_factory(raptor_parser_factory *factory)
{
factory->context_length = sizeof(raptor_grddl_parser_context);
factory->need_base_uri = 1;
factory->init = raptor_grddl_parse_init;
factory->terminate = raptor_grddl_parse_terminate;
factory->start = raptor_grddl_parse_start;
factory->chunk = raptor_grddl_parse_chunk;
factory->recognise_syntax = raptor_grddl_parse_recognise_syntax;
raptor_parser_factory_add_mime_type(factory, "text/html", 2);
raptor_parser_factory_add_mime_type(factory, "application/html+xml", 2);
}
void
raptor_init_parser_grddl(void)
{
raptor_parser_register_factory("grddl",
"Gleaning Resource Descriptions from Dialects of Languages",
&raptor_grddl_parser_register_factory);
#ifdef HAVE_XSLTINIT
xsltInit();
#endif
}
void
raptor_terminate_parser_grddl(void)
{
xsltCleanupGlobals();
}
|
