index/alvis.c

   1 /* $Id: alvis.c,v 1.18 2007-08-21 07:49:18 adam Exp $
   2    Copyright (C) 1995-2007
   3    Index Data ApS
   4
   5 This file is part of the Zebra server.
   6
   7 Zebra is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20
  21 */
  22
  23 #include <stdio.h>
  24 #include <assert.h>
  25 #include <ctype.h>
  26
  27 #include <yaz/diagbib1.h>
  28 #include <yaz/tpath.h>
  29 #include <yaz/oid_db.h>
  30
  31 #include <libxml/xmlversion.h>
  32 #include <libxml/parser.h>
  33 #include <libxml/tree.h>
  34 #include <libxml/xmlIO.h>
  35 #include <libxml/xmlreader.h>
  36 #include <libxslt/transform.h>
  37 #include <libxslt/xsltutils.h>
  38
  39 #if YAZ_HAVE_EXSLT
  40 #include <libexslt/exslt.h>
  41 #endif
  42
  43 #include <idzebra/util.h>
  44 #include <idzebra/recctrl.h>
  45
  46 struct filter_schema {
  47     const char *name;
  48     const char *identifier;
  49     const char *stylesheet;
  50     struct filter_schema *next;
  51     const char *default_schema;
  52     /* char default_schema; */
  53     xsltStylesheetPtr stylesheet_xsp;
  54 };
  55
  56 struct filter_info {
  57     xmlDocPtr doc;
  58     char *fname;
  59     char *full_name;
  60     const char *profile_path;
  61     int split_level;
  62     const char *split_path;
  63     ODR odr;
  64     struct filter_schema *schemas;
  65     xmlTextReaderPtr reader;
  66 };
  67
  68 #define ZEBRA_SCHEMA_XSLT_NS "http://indexdata.dk/zebra/xslt/1"
  69
  70 #define XML_STRCMP(a,b)   strcmp((char*)a, b)
  71 #define XML_STRLEN(a) strlen((char*)a)
  72
  73 static const char *zebra_xslt_ns = ZEBRA_SCHEMA_XSLT_NS;
  74
  75 static void set_param_xml(const char **params, const char *name,
  76                           const char *value, ODR odr)
  77 {
  78     while (*params)
  79         params++;
  80     params[0] = name;
  81     params[1] = value;
  82     params[2] = 0;
  83 }
  84
  85 static void set_param_str(const char **params, const char *name,
  86                           const char *value, ODR odr)
  87 {
  88     char *quoted = odr_malloc(odr, 3 + strlen(value));
  89     sprintf(quoted, "'%s'", value);
  90     while (*params)
  91         params++;
  92     params[0] = name;
  93     params[1] = quoted;
  94     params[2] = 0;
  95 }
  96
  97 static void set_param_int(const char **params, const char *name,
  98                           zint value, ODR odr)
  99 {
 100     char *quoted = odr_malloc(odr, 30); /* 25 digits enough for 2^64 */
 101     while (*params)
 102         params++;
 103     sprintf(quoted, "'" ZINT_FORMAT "'", value);
 104     params[0] = name;
 105     params[1] = quoted;
 106     params[2] = 0;
 107 }
 108
 109 #define ENABLE_INPUT_CALLBACK 0
 110
 111 #if ENABLE_INPUT_CALLBACK
 112 static int zebra_xmlInputMatchCallback (char const *filename)
 113 {
 114     yaz_log(YLOG_LOG, "match %s", filename);
 115     return 0;
 116 }
 117
 118 static void * zebra_xmlInputOpenCallback (char const *filename)
 119 {
 120     return 0;
 121 }
 122
 123 static int zebra_xmlInputReadCallback (void * context, char * buffer, int len)
 124 {
 125     return 0;
 126 }
 127
 128 static int zebra_xmlInputCloseCallback (void * context)
 129 {
 130     return 0;
 131 }
 132 #endif
 133
 134 static void *filter_init(Res res, RecType recType)
 135 {
 136     struct filter_info *tinfo = (struct filter_info *) xmalloc(sizeof(*tinfo));
 137     tinfo->reader = 0;
 138     tinfo->fname = 0;
 139     tinfo->full_name = 0;
 140     tinfo->profile_path = 0;
 141     tinfo->split_level = 0;
 142     tinfo->split_path = 0;
 143     tinfo->odr = odr_createmem(ODR_ENCODE);
 144     tinfo->doc = 0;
 145     tinfo->schemas = 0;
 146
 147 #if YAZ_HAVE_EXSLT
 148     exsltRegisterAll();
 149 #endif
 150
 151 #if ENABLE_INPUT_CALLBACK
 152     xmlRegisterDefaultInputCallbacks();
 153     xmlRegisterInputCallbacks(zebra_xmlInputMatchCallback,
 154                               zebra_xmlInputOpenCallback,
 155                               zebra_xmlInputReadCallback,
 156                               zebra_xmlInputCloseCallback);
 157 #endif
 158     return tinfo;
 159 }
 160
 161 static int attr_content(struct _xmlAttr *attr, const char *name,
 162                         const char **dst_content)
 163 {
 164     if (!XML_STRCMP(attr->name, name) && attr->children
 165         && attr->children->type == XML_TEXT_NODE)
 166     {
 167         *dst_content = (const char *)(attr->children->content);
 168         return 1;
 169     }
 170     return 0;
 171 }
 172
 173 static void destroy_schemas(struct filter_info *tinfo)
 174 {
 175     struct filter_schema *schema = tinfo->schemas;
 176     while (schema)
 177     {
 178         struct filter_schema *schema_next = schema->next;
 179         if (schema->stylesheet_xsp)
 180             xsltFreeStylesheet(schema->stylesheet_xsp);
 181         xfree(schema);
 182         schema = schema_next;
 183     }
 184     tinfo->schemas = 0;
 185     xfree(tinfo->fname);
 186     if (tinfo->doc)
 187         xmlFreeDoc(tinfo->doc);
 188     tinfo->doc = 0;
 189 }
 190
 191 static ZEBRA_RES create_schemas(struct filter_info *tinfo, const char *fname)
 192 {
 193     char tmp_full_name[1024];
 194     xmlNodePtr ptr;
 195     tinfo->fname = xstrdup(fname);
 196
 197     if (yaz_filepath_resolve(tinfo->fname, tinfo->profile_path,
 198                              NULL, tmp_full_name))
 199         tinfo->full_name = xstrdup(tmp_full_name);
 200     else
 201         tinfo->full_name = xstrdup(tinfo->fname);
 202
 203     yaz_log(YLOG_LOG, "alvis filter: loading config file %s", tinfo->full_name);
 204
 205     tinfo->doc = xmlParseFile(tinfo->full_name);
 206
 207     if (!tinfo->doc)
 208     {
 209         yaz_log(YLOG_WARN, "alvis filter: could not parse config file %s",
 210                 tinfo->full_name);
 211
 212         return ZEBRA_FAIL;
 213     }
 214
 215     ptr = xmlDocGetRootElement(tinfo->doc);
 216     if (!ptr || ptr->type != XML_ELEMENT_NODE
 217         || XML_STRCMP(ptr->name, "schemaInfo"))
 218     {
 219         yaz_log(YLOG_WARN,
 220                 "alvis filter:  config file %s :"
 221                 " expected root element <schemaInfo>",
 222                 tinfo->full_name);
 223         return ZEBRA_FAIL;
 224     }
 225
 226     for (ptr = ptr->children; ptr; ptr = ptr->next)
 227     {
 228         if (ptr->type != XML_ELEMENT_NODE)
 229             continue;
 230         if (!XML_STRCMP(ptr->name, "schema"))
 231         {
 232             struct _xmlAttr *attr;
 233             struct filter_schema *schema = xmalloc(sizeof(*schema));
 234             schema->name = 0;
 235             schema->identifier = 0;
 236             schema->stylesheet = 0;
 237             schema->default_schema = 0;
 238             schema->next = tinfo->schemas;
 239             schema->stylesheet_xsp = 0;
 240             tinfo->schemas = schema;
 241             for (attr = ptr->properties; attr; attr = attr->next)
 242             {
 243                 attr_content(attr, "identifier", &schema->identifier);
 244                 attr_content(attr, "name", &schema->name);
 245                 attr_content(attr, "stylesheet", &schema->stylesheet);
 246                 attr_content(attr, "default", &schema->default_schema);
 247             }
 248             /*yaz_log(YLOG_LOG, "XSLT add %s %s %s",
 249               schema->name, schema->identifier, schema->stylesheet); */
 250
 251             /* find requested schema */
 252
 253             if (schema->stylesheet)
 254             {
 255                 char tmp_xslt_full_name[1024];
 256                 if (!yaz_filepath_resolve(schema->stylesheet, tinfo->profile_path,
 257                                           NULL, tmp_xslt_full_name))
 258                 {
 259                     yaz_log(YLOG_WARN,
 260                             "alvis filter: stylesheet %s not found in path %s",
 261                             schema->stylesheet, tinfo->profile_path);
 262                     return ZEBRA_FAIL;
 263                 }
 264                 schema->stylesheet_xsp
 265                     = xsltParseStylesheetFile((const xmlChar*) tmp_xslt_full_name);
 266                 if (!schema->stylesheet_xsp)
 267                 {
 268                     yaz_log(YLOG_WARN,
 269                             "alvis filter: could not parse xslt stylesheet %s",
 270                             tmp_xslt_full_name);
 271                     return ZEBRA_FAIL;
 272                 }
 273             }
 274         }
 275         else if (!XML_STRCMP(ptr->name, "split"))
 276         {
 277             struct _xmlAttr *attr;
 278             for (attr = ptr->properties; attr; attr = attr->next)
 279             {
 280                 const char *split_level_str = 0;
 281                 attr_content(attr, "level", &split_level_str);
 282                 tinfo->split_level =
 283                     split_level_str ? atoi(split_level_str) : 0;
 284             }
 285         }
 286         else
 287         {
 288             yaz_log(YLOG_WARN, "Bad element %s in %s", ptr->name, fname);
 289             return ZEBRA_FAIL;
 290         }
 291     }
 292     return ZEBRA_OK;
 293 }
 294
 295 static struct filter_schema *lookup_schema(struct filter_info *tinfo,
 296                                            const char *est)
 297 {
 298     struct filter_schema *schema;
 299
 300     for (schema = tinfo->schemas; schema; schema = schema->next)
 301     {
 302         /* find requested schema */
 303         if (est)
 304         {
 305             if (schema->identifier && !strcmp(schema->identifier, est))
 306                 return schema;
 307
 308             if (schema->name && !strcmp(schema->name, est))
 309                 return schema;
 310         }
 311         /* or return default schema if defined */
 312         else if (schema->default_schema)
 313             return schema;
 314     }
 315
 316     /* return first schema if no default schema defined */
 317     if (tinfo->schemas)
 318         return tinfo->schemas;
 319
 320     return 0;
 321 }
 322
 323 static ZEBRA_RES filter_config(void *clientData, Res res, const char *args)
 324 {
 325     struct filter_info *tinfo = clientData;
 326     if (!args || !*args)
 327     {
 328         yaz_log(YLOG_WARN, "alvis filter: need config file");
 329         return ZEBRA_FAIL;
 330     }
 331
 332     if (tinfo->fname && !strcmp(args, tinfo->fname))
 333         return ZEBRA_OK;
 334
 335     tinfo->profile_path = res_get(res, "profilePath");
 336     yaz_log(YLOG_LOG, "alvis filter: profilePath %s", tinfo->profile_path);
 337
 338     destroy_schemas(tinfo);
 339     return create_schemas(tinfo, args);
 340 }
 341
 342 static void filter_destroy(void *clientData)
 343 {
 344     struct filter_info *tinfo = clientData;
 345     destroy_schemas(tinfo);
 346     xfree(tinfo->full_name);
 347     if (tinfo->reader)
 348         xmlFreeTextReader(tinfo->reader);
 349     odr_destroy(tinfo->odr);
 350     xfree(tinfo);
 351 }
 352
 353 static int ioread_ex(void *context, char *buffer, int len)
 354 {
 355     struct recExtractCtrl *p = context;
 356     return p->stream->readf(p->stream, buffer, len);
 357 }
 358
 359 static int ioclose_ex(void *context)
 360 {
 361     return 0;
 362 }
 363
 364 static void index_cdata(struct filter_info *tinfo, struct recExtractCtrl *ctrl,
 365                         xmlNodePtr ptr, RecWord *recWord)
 366 {
 367     for(; ptr; ptr = ptr->next)
 368     {
 369         index_cdata(tinfo, ctrl, ptr->children, recWord);
 370         if (ptr->type != XML_TEXT_NODE)
 371             continue;
 372         recWord->term_buf = (const char *)ptr->content;
 373         recWord->term_len = XML_STRLEN(ptr->content);
 374         (*ctrl->tokenAdd)(recWord);
 375     }
 376 }
 377
 378 static void index_node(struct filter_info *tinfo,  struct recExtractCtrl *ctrl,
 379                        xmlNodePtr ptr, RecWord *recWord)
 380 {
 381     for(; ptr; ptr = ptr->next)
 382     {
 383         index_node(tinfo, ctrl, ptr->children, recWord);
 384         if (ptr->type != XML_ELEMENT_NODE || !ptr->ns ||
 385             XML_STRCMP(ptr->ns->href, zebra_xslt_ns))
 386             continue;
 387         if (!XML_STRCMP(ptr->name, "index"))
 388         {
 389             const char *name_str = 0;
 390             const char *type_str = 0;
 391             const char *xpath_str = 0;
 392             struct _xmlAttr *attr;
 393             for (attr = ptr->properties; attr; attr = attr->next)
 394             {
 395                 attr_content(attr, "name", &name_str);
 396                 attr_content(attr, "xpath", &xpath_str);
 397                 attr_content(attr, "type", &type_str);
 398             }
 399             if (name_str)
 400             {
 401                 int prev_type = recWord->index_type; /* save default type */
 402
 403                 if (type_str && *type_str)
 404                     recWord->index_type = *type_str; /* type was given */
 405                 recWord->index_name = name_str;
 406                 index_cdata(tinfo, ctrl, ptr->children, recWord);
 407
 408                 recWord->index_type = prev_type;     /* restore it again */
 409             }
 410         }
 411     }
 412 }
 413
 414 static void index_record(struct filter_info *tinfo,struct recExtractCtrl *ctrl,
 415                          xmlNodePtr ptr, RecWord *recWord)
 416 {
 417     const char *type_str = "update";
 418
 419     if (ptr && ptr->type == XML_ELEMENT_NODE && ptr->ns &&
 420         !XML_STRCMP(ptr->ns->href, zebra_xslt_ns)
 421         && !XML_STRCMP(ptr->name, "record"))
 422     {
 423         const char *id_str = 0;
 424         const char *rank_str = 0;
 425         struct _xmlAttr *attr;
 426         for (attr = ptr->properties; attr; attr = attr->next)
 427         {
 428             attr_content(attr, "type", &type_str);
 429             attr_content(attr, "id", &id_str);
 430             attr_content(attr, "rank", &rank_str);
 431         }
 432         if (id_str)
 433             sscanf(id_str, "%255s", ctrl->match_criteria);
 434
 435         if (rank_str)
 436             ctrl->staticrank = atozint(rank_str);
 437         ptr = ptr->children;
 438     }
 439
 440     if (!strcmp("update", type_str))
 441         index_node(tinfo, ctrl, ptr, recWord);
 442     else if (!strcmp("delete", type_str))
 443          yaz_log(YLOG_WARN, "alvis filter delete: to be implemented");
 444     else
 445          yaz_log(YLOG_WARN, "alvis filter: unknown record type '%s'",
 446                  type_str);
 447 }
 448
 449 static int extract_doc(struct filter_info *tinfo, struct recExtractCtrl *p,
 450                        xmlDocPtr doc)
 451 {
 452     RecWord recWord;
 453     const char *params[10];
 454     xmlChar *buf_out;
 455     int len_out;
 456
 457     struct filter_schema *schema = lookup_schema(tinfo, zebra_xslt_ns);
 458
 459     params[0] = 0;
 460     set_param_str(params, "schema", zebra_xslt_ns, tinfo->odr);
 461
 462     (*p->init)(p, &recWord);
 463
 464     if (schema && schema->stylesheet_xsp)
 465     {
 466         xmlNodePtr root_ptr;
 467         xmlDocPtr resDoc =
 468             xsltApplyStylesheet(schema->stylesheet_xsp,
 469                                 doc, params);
 470         if (p->flagShowRecords)
 471         {
 472             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 473             fwrite(buf_out, len_out, 1, stdout);
 474             xmlFree(buf_out);
 475         }
 476         root_ptr = xmlDocGetRootElement(resDoc);
 477         if (root_ptr)
 478             index_record(tinfo, p, root_ptr, &recWord);
 479         else
 480         {
 481             yaz_log(YLOG_WARN, "No root for index XML record."
 482                     " split_level=%d stylesheet=%s",
 483                     tinfo->split_level, schema->stylesheet);
 484         }
 485         xmlFreeDoc(resDoc);
 486     }
 487     xmlDocDumpMemory(doc, &buf_out, &len_out);
 488     if (p->flagShowRecords)
 489         fwrite(buf_out, len_out, 1, stdout);
 490     (*p->setStoreData)(p, buf_out, len_out);
 491     xmlFree(buf_out);
 492
 493     xmlFreeDoc(doc);
 494     return RECCTRL_EXTRACT_OK;
 495 }
 496
 497 static int extract_split(struct filter_info *tinfo, struct recExtractCtrl *p)
 498 {
 499     int ret;
 500
 501     if (p->first_record)
 502     {
 503         if (tinfo->reader)
 504             xmlFreeTextReader(tinfo->reader);
 505         tinfo->reader = xmlReaderForIO(ioread_ex, ioclose_ex,
 506                                        p /* I/O handler */,
 507                                        0 /* URL */,
 508                                        0 /* encoding */,
 509                                        XML_PARSE_XINCLUDE
 510                                        | XML_PARSE_NOENT
 511                                        | XML_PARSE_NONET);
 512     }
 513     if (!tinfo->reader)
 514         return RECCTRL_EXTRACT_ERROR_GENERIC;
 515
 516     ret = xmlTextReaderRead(tinfo->reader);
 517     while (ret == 1)
 518     {
 519         int type = xmlTextReaderNodeType(tinfo->reader);
 520         int depth = xmlTextReaderDepth(tinfo->reader);
 521         if (type == XML_READER_TYPE_ELEMENT && tinfo->split_level == depth)
 522         {
 523             xmlNodePtr ptr = xmlTextReaderExpand(tinfo->reader);
 524             if (ptr)
 525             {
 526                 xmlNodePtr ptr2 = xmlCopyNode(ptr, 1);
 527                 xmlDocPtr doc = xmlNewDoc((const xmlChar*) "1.0");
 528
 529                 xmlDocSetRootElement(doc, ptr2);
 530
 531                 return extract_doc(tinfo, p, doc);
 532             }
 533             else
 534             {
 535                 xmlFreeTextReader(tinfo->reader);
 536                 tinfo->reader = 0;
 537                 return RECCTRL_EXTRACT_ERROR_GENERIC;
 538             }
 539         }
 540         ret = xmlTextReaderRead(tinfo->reader);
 541     }
 542     xmlFreeTextReader(tinfo->reader);
 543     tinfo->reader = 0;
 544     return RECCTRL_EXTRACT_EOF;
 545 }
 546
 547 static int extract_full(struct filter_info *tinfo, struct recExtractCtrl *p)
 548 {
 549     if (p->first_record) /* only one record per stream */
 550     {
 551        xmlDocPtr doc = xmlReadIO(ioread_ex, ioclose_ex, p /* I/O handler */,
 552                                  0 /* URL */,
 553                                  0 /* encoding */,
 554                                  XML_PARSE_XINCLUDE
 555                                  | XML_PARSE_NOENT
 556                                  | XML_PARSE_NONET);
 557        if (!doc)
 558            return RECCTRL_EXTRACT_ERROR_GENERIC;
 559        /* else {
 560            xmlNodePtr root = xmlDocGetRootElement(doc);
 561             if (!root)
 562                 return RECCTRL_EXTRACT_ERROR_GENERIC;
 563                 } */
 564
 565        return extract_doc(tinfo, p, doc);
 566     }
 567     else
 568        return RECCTRL_EXTRACT_EOF;
 569 }
 570
 571 static int filter_extract(void *clientData, struct recExtractCtrl *p)
 572 {
 573     struct filter_info *tinfo = clientData;
 574
 575     odr_reset(tinfo->odr);
 576     if (tinfo->split_level == 0)
 577         return extract_full(tinfo, p);
 578     else
 579         return extract_split(tinfo, p);
 580 }
 581
 582 static int ioread_ret(void *context, char *buffer, int len)
 583 {
 584     struct recRetrieveCtrl *p = context;
 585     return p->stream->readf(p->stream, buffer, len);
 586 }
 587
 588 static int ioclose_ret(void *context)
 589 {
 590     return 0;
 591 }
 592
 593 static int filter_retrieve (void *clientData, struct recRetrieveCtrl *p)
 594 {
 595     /* const char *esn = zebra_xslt_ns; */
 596     const char *esn = 0;
 597     const char *params[32];
 598     struct filter_info *tinfo = clientData;
 599     xmlDocPtr resDoc;
 600     xmlDocPtr doc;
 601     struct filter_schema *schema;
 602
 603     if (p->comp)
 604     {
 605         if (p->comp->which == Z_RecordComp_simple
 606             && p->comp->u.simple->which == Z_ElementSetNames_generic)
 607         {
 608             esn = p->comp->u.simple->u.generic;
 609         }
 610         else if (p->comp->which == Z_RecordComp_complex
 611                  && p->comp->u.complex->generic->elementSpec
 612                  && p->comp->u.complex->generic->elementSpec->which ==
 613                  Z_ElementSpec_elementSetName)
 614         {
 615             esn = p->comp->u.complex->generic->elementSpec->u.elementSetName;
 616         }
 617     }
 618     schema = lookup_schema(tinfo, esn);
 619     if (!schema)
 620     {
 621         p->diagnostic =
 622             YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 623         return 0;
 624     }
 625
 626     params[0] = 0;
 627     set_param_int(params, "id", p->localno, p->odr);
 628     if (p->fname)
 629         set_param_str(params, "filename", p->fname, p->odr);
 630     if (p->staticrank >= 0)
 631         set_param_int(params, "rank", p->staticrank, p->odr);
 632
 633     if (esn)
 634         set_param_str(params, "schema", esn, p->odr);
 635     else
 636         if (schema->name)
 637             set_param_str(params, "schema", schema->name, p->odr);
 638         else if (schema->identifier)
 639             set_param_str(params, "schema", schema->identifier, p->odr);
 640         else
 641             set_param_str(params, "schema", "", p->odr);
 642
 643     if (p->score >= 0)
 644         set_param_int(params, "score", p->score, p->odr);
 645     set_param_int(params, "size", p->recordSize, p->odr);
 646
 647     doc = xmlReadIO(ioread_ret, ioclose_ret, p /* I/O handler */,
 648                     0 /* URL */,
 649                     0 /* encoding */,
 650                     XML_PARSE_XINCLUDE | XML_PARSE_NOENT | XML_PARSE_NONET);
 651     if (!doc)
 652     {
 653         p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 654         return 0;
 655     }
 656
 657     if (!schema->stylesheet_xsp)
 658         resDoc = doc;
 659     else
 660     {
 661         resDoc = xsltApplyStylesheet(schema->stylesheet_xsp,
 662                                      doc, params);
 663         xmlFreeDoc(doc);
 664     }
 665     if (!resDoc)
 666     {
 667         p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 668     }
 669     else if (!p->input_format
 670              || !oid_oidcmp(p->input_format, yaz_oid_recsyn_xml))
 671     {
 672         xmlChar *buf_out;
 673         int len_out;
 674
 675         if (schema->stylesheet_xsp)
 676             xsltSaveResultToString(&buf_out, &len_out, resDoc,
 677                                    schema->stylesheet_xsp);
 678         else
 679             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 680
 681         p->output_format = yaz_oid_recsyn_xml;
 682         p->rec_len = len_out;
 683         p->rec_buf = odr_malloc(p->odr, p->rec_len);
 684         memcpy(p->rec_buf, buf_out, p->rec_len);
 685         xmlFree(buf_out);
 686     }
 687     else if (!oid_oidcmp(p->output_format, yaz_oid_recsyn_sutrs))
 688     {
 689         xmlChar *buf_out;
 690         int len_out;
 691
 692         if (schema->stylesheet_xsp)
 693             xsltSaveResultToString(&buf_out, &len_out, resDoc,
 694                                    schema->stylesheet_xsp);
 695         else
 696             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 697
 698         p->output_format = yaz_oid_recsyn_sutrs;
 699         p->rec_len = len_out;
 700         p->rec_buf = odr_malloc(p->odr, p->rec_len);
 701         memcpy(p->rec_buf, buf_out, p->rec_len);
 702
 703         xmlFree(buf_out);
 704     }
 705     else
 706     {
 707         p->diagnostic = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 708     }
 709     xmlFreeDoc(resDoc);
 710     return 0;
 711 }
 712
 713 static struct recType filter_type = {
 714     0,
 715     "alvis",
 716     filter_init,
 717     filter_config,
 718     filter_destroy,
 719     filter_extract,
 720     filter_retrieve
 721 };
 722
 723 RecType
 724 #ifdef IDZEBRA_STATIC_ALVIS
 725 idzebra_filter_alvis
 726 #else
 727 idzebra_filter
 728 #endif
 729
 730 [] = {
 731     &filter_type,
 732     0,
 733 };
 734 /*
 735  * Local variables:
 736  * c-basic-offset: 4
 737  * indent-tabs-mode: nil
 738  * End:
 739  * vim: shiftwidth=4 tabstop=8 expandtab
 740  */
 741