index/mod_alvis.c

   1 /* This file is part of the Zebra server.
   2    Copyright (C) 1994-2010 Index Data
   3
   4 Zebra is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17
  18 */
  19
  20 #include <stdio.h>
  21 #include <assert.h>
  22 #include <ctype.h>
  23
  24 #include <yaz/diagbib1.h>
  25 #include <yaz/tpath.h>
  26 #include <yaz/oid_db.h>
  27
  28 #include <libxml/xmlversion.h>
  29 #include <libxml/parser.h>
  30 #include <libxml/tree.h>
  31 #include <libxml/xmlIO.h>
  32 #include <libxml/xmlreader.h>
  33 #include <libxslt/transform.h>
  34 #include <libxslt/xsltutils.h>
  35
  36 #if YAZ_HAVE_EXSLT
  37 #include <libexslt/exslt.h>
  38 #endif
  39
  40 #include <idzebra/util.h>
  41 #include <idzebra/recctrl.h>
  42
  43 struct filter_schema {
  44     const char *name;
  45     const char *identifier;
  46     const char *stylesheet;
  47     struct filter_schema *next;
  48     const char *default_schema;
  49     /* char default_schema; */
  50     xsltStylesheetPtr stylesheet_xsp;
  51 };
  52
  53 struct filter_info {
  54     xmlDocPtr doc;
  55     char *fname;
  56     char *full_name;
  57     const char *profile_path;
  58     int split_level;
  59     const char *split_path;
  60     ODR odr;
  61     struct filter_schema *schemas;
  62     xmlTextReaderPtr reader;
  63 };
  64
  65 #define ZEBRA_SCHEMA_XSLT_NS "http://indexdata.dk/zebra/xslt/1"
  66
  67 #define XML_STRCMP(a,b)   strcmp((char*)a, b)
  68 #define XML_STRLEN(a) strlen((char*)a)
  69
  70 static const char *zebra_xslt_ns = ZEBRA_SCHEMA_XSLT_NS;
  71
  72 static void set_param_str(const char **params, const char *name,
  73                           const char *value, ODR odr)
  74 {
  75     char *quoted = odr_malloc(odr, 3 + strlen(value));
  76     sprintf(quoted, "'%s'", value);
  77     while (*params)
  78         params++;
  79     params[0] = name;
  80     params[1] = quoted;
  81     params[2] = 0;
  82 }
  83
  84 static void set_param_int(const char **params, const char *name,
  85                           zint value, ODR odr)
  86 {
  87     char *quoted = odr_malloc(odr, 30); /* 25 digits enough for 2^64 */
  88     while (*params)
  89         params++;
  90     sprintf(quoted, "'" ZINT_FORMAT "'", value);
  91     params[0] = name;
  92     params[1] = quoted;
  93     params[2] = 0;
  94 }
  95
  96 #define ENABLE_INPUT_CALLBACK 0
  97
  98 #if ENABLE_INPUT_CALLBACK
  99 static int zebra_xmlInputMatchCallback (char const *filename)
 100 {
 101     yaz_log(YLOG_LOG, "match %s", filename);
 102     return 0;
 103 }
 104
 105 static void * zebra_xmlInputOpenCallback (char const *filename)
 106 {
 107     return 0;
 108 }
 109
 110 static int zebra_xmlInputReadCallback (void * context, char * buffer, int len)
 111 {
 112     return 0;
 113 }
 114
 115 static int zebra_xmlInputCloseCallback (void * context)
 116 {
 117     return 0;
 118 }
 119 #endif
 120
 121 static void *filter_init(Res res, RecType recType)
 122 {
 123     struct filter_info *tinfo = (struct filter_info *) xmalloc(sizeof(*tinfo));
 124     tinfo->reader = 0;
 125     tinfo->fname = 0;
 126     tinfo->full_name = 0;
 127     tinfo->profile_path = 0;
 128     tinfo->split_level = 0;
 129     tinfo->split_path = 0;
 130     tinfo->odr = odr_createmem(ODR_ENCODE);
 131     tinfo->doc = 0;
 132     tinfo->schemas = 0;
 133
 134 #if YAZ_HAVE_EXSLT
 135     exsltRegisterAll();
 136 #endif
 137
 138 #if ENABLE_INPUT_CALLBACK
 139     xmlRegisterDefaultInputCallbacks();
 140     xmlRegisterInputCallbacks(zebra_xmlInputMatchCallback,
 141                               zebra_xmlInputOpenCallback,
 142                               zebra_xmlInputReadCallback,
 143                               zebra_xmlInputCloseCallback);
 144 #endif
 145     return tinfo;
 146 }
 147
 148 static int attr_content(struct _xmlAttr *attr, const char *name,
 149                         const char **dst_content)
 150 {
 151     if (!XML_STRCMP(attr->name, name) && attr->children
 152         && attr->children->type == XML_TEXT_NODE)
 153     {
 154         *dst_content = (const char *)(attr->children->content);
 155         return 1;
 156     }
 157     return 0;
 158 }
 159
 160 static void destroy_schemas(struct filter_info *tinfo)
 161 {
 162     struct filter_schema *schema = tinfo->schemas;
 163     while (schema)
 164     {
 165         struct filter_schema *schema_next = schema->next;
 166         if (schema->stylesheet_xsp)
 167             xsltFreeStylesheet(schema->stylesheet_xsp);
 168         xfree(schema);
 169         schema = schema_next;
 170     }
 171     tinfo->schemas = 0;
 172     xfree(tinfo->fname);
 173     if (tinfo->doc)
 174         xmlFreeDoc(tinfo->doc);
 175     tinfo->doc = 0;
 176 }
 177
 178 static ZEBRA_RES create_schemas(struct filter_info *tinfo, const char *fname)
 179 {
 180     char tmp_full_name[1024];
 181     xmlNodePtr ptr;
 182     tinfo->fname = xstrdup(fname);
 183
 184     if (yaz_filepath_resolve(tinfo->fname, tinfo->profile_path,
 185                              NULL, tmp_full_name))
 186         tinfo->full_name = xstrdup(tmp_full_name);
 187     else
 188         tinfo->full_name = xstrdup(tinfo->fname);
 189
 190     yaz_log(YLOG_LOG, "alvis filter: loading config file %s", tinfo->full_name);
 191
 192     tinfo->doc = xmlParseFile(tinfo->full_name);
 193
 194     if (!tinfo->doc)
 195     {
 196         yaz_log(YLOG_WARN, "alvis filter: could not parse config file %s",
 197                 tinfo->full_name);
 198
 199         return ZEBRA_FAIL;
 200     }
 201
 202     ptr = xmlDocGetRootElement(tinfo->doc);
 203     if (!ptr || ptr->type != XML_ELEMENT_NODE
 204         || XML_STRCMP(ptr->name, "schemaInfo"))
 205     {
 206         yaz_log(YLOG_WARN,
 207                 "alvis filter:  config file %s :"
 208                 " expected root element <schemaInfo>",
 209                 tinfo->full_name);
 210         return ZEBRA_FAIL;
 211     }
 212
 213     for (ptr = ptr->children; ptr; ptr = ptr->next)
 214     {
 215         if (ptr->type != XML_ELEMENT_NODE)
 216             continue;
 217         if (!XML_STRCMP(ptr->name, "schema"))
 218         {
 219             struct _xmlAttr *attr;
 220             struct filter_schema *schema = xmalloc(sizeof(*schema));
 221             schema->name = 0;
 222             schema->identifier = 0;
 223             schema->stylesheet = 0;
 224             schema->default_schema = 0;
 225             schema->next = tinfo->schemas;
 226             schema->stylesheet_xsp = 0;
 227             tinfo->schemas = schema;
 228             for (attr = ptr->properties; attr; attr = attr->next)
 229             {
 230                 attr_content(attr, "identifier", &schema->identifier);
 231                 attr_content(attr, "name", &schema->name);
 232                 attr_content(attr, "stylesheet", &schema->stylesheet);
 233                 attr_content(attr, "default", &schema->default_schema);
 234             }
 235             /*yaz_log(YLOG_LOG, "XSLT add %s %s %s",
 236               schema->name, schema->identifier, schema->stylesheet); */
 237
 238             /* find requested schema */
 239
 240             if (schema->stylesheet)
 241             {
 242                 char tmp_xslt_full_name[1024];
 243                 if (!yaz_filepath_resolve(schema->stylesheet, tinfo->profile_path,
 244                                           NULL, tmp_xslt_full_name))
 245                 {
 246                     yaz_log(YLOG_WARN,
 247                             "alvis filter: stylesheet %s not found in path %s",
 248                             schema->stylesheet, tinfo->profile_path);
 249                     return ZEBRA_FAIL;
 250                 }
 251                 schema->stylesheet_xsp
 252                     = xsltParseStylesheetFile((const xmlChar*) tmp_xslt_full_name);
 253                 if (!schema->stylesheet_xsp)
 254                 {
 255                     yaz_log(YLOG_WARN,
 256                             "alvis filter: could not parse xslt stylesheet %s",
 257                             tmp_xslt_full_name);
 258                     return ZEBRA_FAIL;
 259                 }
 260             }
 261         }
 262         else if (!XML_STRCMP(ptr->name, "split"))
 263         {
 264             struct _xmlAttr *attr;
 265             for (attr = ptr->properties; attr; attr = attr->next)
 266             {
 267                 const char *split_level_str = 0;
 268                 attr_content(attr, "level", &split_level_str);
 269                 tinfo->split_level =
 270                     split_level_str ? atoi(split_level_str) : 0;
 271             }
 272         }
 273         else
 274         {
 275             yaz_log(YLOG_WARN, "Bad element %s in %s", ptr->name, fname);
 276             return ZEBRA_FAIL;
 277         }
 278     }
 279     return ZEBRA_OK;
 280 }
 281
 282 static struct filter_schema *lookup_schema(struct filter_info *tinfo,
 283                                            const char *est)
 284 {
 285     struct filter_schema *schema;
 286
 287     for (schema = tinfo->schemas; schema; schema = schema->next)
 288     {
 289         /* find requested schema */
 290         if (est)
 291         {
 292             if (schema->identifier && !strcmp(schema->identifier, est))
 293                 return schema;
 294
 295             if (schema->name && !strcmp(schema->name, est))
 296                 return schema;
 297         }
 298         /* or return default schema if defined */
 299         else if (schema->default_schema)
 300             return schema;
 301     }
 302
 303     /* return first schema if no default schema defined */
 304     if (tinfo->schemas)
 305         return tinfo->schemas;
 306
 307     return 0;
 308 }
 309
 310 static ZEBRA_RES filter_config(void *clientData, Res res, const char *args)
 311 {
 312     struct filter_info *tinfo = clientData;
 313     if (!args || !*args)
 314     {
 315         yaz_log(YLOG_WARN, "alvis filter: need config file");
 316         return ZEBRA_FAIL;
 317     }
 318
 319     if (tinfo->fname && !strcmp(args, tinfo->fname))
 320         return ZEBRA_OK;
 321
 322     tinfo->profile_path = res_get(res, "profilePath");
 323     yaz_log(YLOG_LOG, "alvis filter: profilePath %s", tinfo->profile_path);
 324
 325     destroy_schemas(tinfo);
 326     return create_schemas(tinfo, args);
 327 }
 328
 329 static void filter_destroy(void *clientData)
 330 {
 331     struct filter_info *tinfo = clientData;
 332     destroy_schemas(tinfo);
 333     xfree(tinfo->full_name);
 334     if (tinfo->reader)
 335         xmlFreeTextReader(tinfo->reader);
 336     odr_destroy(tinfo->odr);
 337     xfree(tinfo);
 338 }
 339
 340 static int ioread_ex(void *context, char *buffer, int len)
 341 {
 342     struct recExtractCtrl *p = context;
 343     return p->stream->readf(p->stream, buffer, len);
 344 }
 345
 346 static int ioclose_ex(void *context)
 347 {
 348     return 0;
 349 }
 350
 351 static void index_cdata(struct filter_info *tinfo, struct recExtractCtrl *ctrl,
 352                         xmlNodePtr ptr, RecWord *recWord)
 353 {
 354     for(; ptr; ptr = ptr->next)
 355     {
 356         index_cdata(tinfo, ctrl, ptr->children, recWord);
 357         if (ptr->type != XML_TEXT_NODE)
 358             continue;
 359         recWord->term_buf = (const char *)ptr->content;
 360         recWord->term_len = XML_STRLEN(ptr->content);
 361         (*ctrl->tokenAdd)(recWord);
 362     }
 363 }
 364
 365 static void index_node(struct filter_info *tinfo,  struct recExtractCtrl *ctrl,
 366                        xmlNodePtr ptr, RecWord *recWord)
 367 {
 368     for(; ptr; ptr = ptr->next)
 369     {
 370         index_node(tinfo, ctrl, ptr->children, recWord);
 371         if (ptr->type != XML_ELEMENT_NODE || !ptr->ns ||
 372             XML_STRCMP(ptr->ns->href, zebra_xslt_ns))
 373             continue;
 374         if (!XML_STRCMP(ptr->name, "index"))
 375         {
 376             const char *name_str = 0;
 377             const char *type_str = 0;
 378             const char *xpath_str = 0;
 379             struct _xmlAttr *attr;
 380             for (attr = ptr->properties; attr; attr = attr->next)
 381             {
 382                 attr_content(attr, "name", &name_str);
 383                 attr_content(attr, "xpath", &xpath_str);
 384                 attr_content(attr, "type", &type_str);
 385             }
 386             if (name_str)
 387             {
 388                 const char *prev_type = recWord->index_type; /* save default type */
 389
 390                 if (type_str && *type_str)
 391                     recWord->index_type = (const char *) type_str; /* type was given */
 392                 recWord->index_name = name_str;
 393                 index_cdata(tinfo, ctrl, ptr->children, recWord);
 394
 395                 recWord->index_type = prev_type;     /* restore it again */
 396             }
 397         }
 398     }
 399 }
 400
 401 static void index_record(struct filter_info *tinfo,struct recExtractCtrl *ctrl,
 402                          xmlNodePtr ptr, RecWord *recWord)
 403 {
 404     const char *type_str = "update";
 405
 406     if (ptr && ptr->type == XML_ELEMENT_NODE && ptr->ns &&
 407         !XML_STRCMP(ptr->ns->href, zebra_xslt_ns)
 408         && !XML_STRCMP(ptr->name, "record"))
 409     {
 410         const char *id_str = 0;
 411         const char *rank_str = 0;
 412         struct _xmlAttr *attr;
 413         for (attr = ptr->properties; attr; attr = attr->next)
 414         {
 415             attr_content(attr, "type", &type_str);
 416             attr_content(attr, "id", &id_str);
 417             attr_content(attr, "rank", &rank_str);
 418         }
 419         if (id_str)
 420             sscanf(id_str, "%255s", ctrl->match_criteria);
 421
 422         if (rank_str)
 423             ctrl->staticrank = atozint(rank_str);
 424         ptr = ptr->children;
 425     }
 426
 427     if (!strcmp("update", type_str))
 428         index_node(tinfo, ctrl, ptr, recWord);
 429     else if (!strcmp("delete", type_str))
 430          yaz_log(YLOG_WARN, "alvis filter delete: to be implemented");
 431     else
 432          yaz_log(YLOG_WARN, "alvis filter: unknown record type '%s'",
 433                  type_str);
 434 }
 435
 436 static int extract_doc(struct filter_info *tinfo, struct recExtractCtrl *p,
 437                        xmlDocPtr doc)
 438 {
 439     RecWord recWord;
 440     const char *params[10];
 441     xmlChar *buf_out;
 442     int len_out;
 443
 444     struct filter_schema *schema = lookup_schema(tinfo, zebra_xslt_ns);
 445
 446     params[0] = 0;
 447     set_param_str(params, "schema", zebra_xslt_ns, tinfo->odr);
 448
 449     (*p->init)(p, &recWord);
 450
 451     if (schema && schema->stylesheet_xsp)
 452     {
 453         xmlNodePtr root_ptr;
 454         xmlDocPtr resDoc =
 455             xsltApplyStylesheet(schema->stylesheet_xsp,
 456                                 doc, params);
 457         if (p->flagShowRecords)
 458         {
 459             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 460             fwrite(buf_out, len_out, 1, stdout);
 461             xmlFree(buf_out);
 462         }
 463         root_ptr = xmlDocGetRootElement(resDoc);
 464         if (root_ptr)
 465             index_record(tinfo, p, root_ptr, &recWord);
 466         else
 467         {
 468             yaz_log(YLOG_WARN, "No root for index XML record."
 469                     " split_level=%d stylesheet=%s",
 470                     tinfo->split_level, schema->stylesheet);
 471         }
 472         xmlFreeDoc(resDoc);
 473     }
 474     xmlDocDumpMemory(doc, &buf_out, &len_out);
 475     if (p->flagShowRecords)
 476         fwrite(buf_out, len_out, 1, stdout);
 477     if (p->setStoreData)
 478         (*p->setStoreData)(p, buf_out, len_out);
 479     xmlFree(buf_out);
 480
 481     xmlFreeDoc(doc);
 482     return RECCTRL_EXTRACT_OK;
 483 }
 484
 485 static int extract_split(struct filter_info *tinfo, struct recExtractCtrl *p)
 486 {
 487     int ret;
 488
 489     if (p->first_record)
 490     {
 491         if (tinfo->reader)
 492             xmlFreeTextReader(tinfo->reader);
 493         tinfo->reader = xmlReaderForIO(ioread_ex, ioclose_ex,
 494                                        p /* I/O handler */,
 495                                        0 /* URL */,
 496                                        0 /* encoding */,
 497                                        XML_PARSE_XINCLUDE
 498                                        | XML_PARSE_NOENT
 499                                        | XML_PARSE_NONET);
 500     }
 501     if (!tinfo->reader)
 502         return RECCTRL_EXTRACT_ERROR_GENERIC;
 503
 504     ret = xmlTextReaderRead(tinfo->reader);
 505     while (ret == 1)
 506     {
 507         int type = xmlTextReaderNodeType(tinfo->reader);
 508         int depth = xmlTextReaderDepth(tinfo->reader);
 509         if (type == XML_READER_TYPE_ELEMENT && tinfo->split_level == depth)
 510         {
 511             xmlNodePtr ptr = xmlTextReaderExpand(tinfo->reader);
 512             if (ptr)
 513             {
 514                 xmlNodePtr ptr2 = xmlCopyNode(ptr, 1);
 515                 xmlDocPtr doc = xmlNewDoc((const xmlChar*) "1.0");
 516
 517                 xmlDocSetRootElement(doc, ptr2);
 518
 519                 return extract_doc(tinfo, p, doc);
 520             }
 521             else
 522             {
 523                 xmlFreeTextReader(tinfo->reader);
 524                 tinfo->reader = 0;
 525                 return RECCTRL_EXTRACT_ERROR_GENERIC;
 526             }
 527         }
 528         ret = xmlTextReaderRead(tinfo->reader);
 529     }
 530     xmlFreeTextReader(tinfo->reader);
 531     tinfo->reader = 0;
 532     return RECCTRL_EXTRACT_EOF;
 533 }
 534
 535 static int extract_full(struct filter_info *tinfo, struct recExtractCtrl *p)
 536 {
 537     if (p->first_record) /* only one record per stream */
 538     {
 539        xmlDocPtr doc = xmlReadIO(ioread_ex, ioclose_ex, p /* I/O handler */,
 540                                  0 /* URL */,
 541                                  0 /* encoding */,
 542                                  XML_PARSE_XINCLUDE
 543                                  | XML_PARSE_NOENT
 544                                  | XML_PARSE_NONET);
 545        if (!doc)
 546            return RECCTRL_EXTRACT_ERROR_GENERIC;
 547        /* else {
 548            xmlNodePtr root = xmlDocGetRootElement(doc);
 549             if (!root)
 550                 return RECCTRL_EXTRACT_ERROR_GENERIC;
 551                 } */
 552
 553        return extract_doc(tinfo, p, doc);
 554     }
 555     else
 556        return RECCTRL_EXTRACT_EOF;
 557 }
 558
 559 static int filter_extract(void *clientData, struct recExtractCtrl *p)
 560 {
 561     struct filter_info *tinfo = clientData;
 562
 563     odr_reset(tinfo->odr);
 564     if (tinfo->split_level == 0 || p->setStoreData == 0)
 565         return extract_full(tinfo, p);
 566     else
 567         return extract_split(tinfo, p);
 568 }
 569
 570 static int ioread_ret(void *context, char *buffer, int len)
 571 {
 572     struct recRetrieveCtrl *p = context;
 573     return p->stream->readf(p->stream, buffer, len);
 574 }
 575
 576 static int ioclose_ret(void *context)
 577 {
 578     return 0;
 579 }
 580
 581 static int filter_retrieve (void *clientData, struct recRetrieveCtrl *p)
 582 {
 583     /* const char *esn = zebra_xslt_ns; */
 584     const char *esn = 0;
 585     const char *params[32];
 586     struct filter_info *tinfo = clientData;
 587     xmlDocPtr resDoc;
 588     xmlDocPtr doc;
 589     struct filter_schema *schema;
 590
 591     if (p->comp)
 592     {
 593         if (p->comp->which == Z_RecordComp_simple
 594             && p->comp->u.simple->which == Z_ElementSetNames_generic)
 595         {
 596             esn = p->comp->u.simple->u.generic;
 597         }
 598         else if (p->comp->which == Z_RecordComp_complex
 599                  && p->comp->u.complex->generic->elementSpec
 600                  && p->comp->u.complex->generic->elementSpec->which ==
 601                  Z_ElementSpec_elementSetName)
 602         {
 603             esn = p->comp->u.complex->generic->elementSpec->u.elementSetName;
 604         }
 605     }
 606     schema = lookup_schema(tinfo, esn);
 607     if (!schema)
 608     {
 609         p->diagnostic =
 610             YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 611         return 0;
 612     }
 613
 614     params[0] = 0;
 615     set_param_int(params, "id", p->localno, p->odr);
 616     if (p->fname)
 617         set_param_str(params, "filename", p->fname, p->odr);
 618     if (p->staticrank >= 0)
 619         set_param_int(params, "rank", p->staticrank, p->odr);
 620
 621     if (esn)
 622         set_param_str(params, "schema", esn, p->odr);
 623     else
 624         if (schema->name)
 625             set_param_str(params, "schema", schema->name, p->odr);
 626         else if (schema->identifier)
 627             set_param_str(params, "schema", schema->identifier, p->odr);
 628         else
 629             set_param_str(params, "schema", "", p->odr);
 630
 631     if (p->score >= 0)
 632         set_param_int(params, "score", p->score, p->odr);
 633     set_param_int(params, "size", p->recordSize, p->odr);
 634
 635     doc = xmlReadIO(ioread_ret, ioclose_ret, p /* I/O handler */,
 636                     0 /* URL */,
 637                     0 /* encoding */,
 638                     XML_PARSE_XINCLUDE | XML_PARSE_NOENT | XML_PARSE_NONET);
 639     if (!doc)
 640     {
 641         p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 642         return 0;
 643     }
 644
 645     if (!schema->stylesheet_xsp)
 646         resDoc = doc;
 647     else
 648     {
 649         resDoc = xsltApplyStylesheet(schema->stylesheet_xsp,
 650                                      doc, params);
 651         xmlFreeDoc(doc);
 652     }
 653     if (!resDoc)
 654     {
 655         p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 656     }
 657     else if (!p->input_format
 658              || !oid_oidcmp(p->input_format, yaz_oid_recsyn_xml))
 659     {
 660         xmlChar *buf_out;
 661         int len_out;
 662
 663         if (schema->stylesheet_xsp)
 664             xsltSaveResultToString(&buf_out, &len_out, resDoc,
 665                                    schema->stylesheet_xsp);
 666         else
 667             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 668
 669         p->output_format = yaz_oid_recsyn_xml;
 670         p->rec_len = len_out;
 671         p->rec_buf = odr_malloc(p->odr, p->rec_len);
 672         memcpy(p->rec_buf, buf_out, p->rec_len);
 673         xmlFree(buf_out);
 674     }
 675     else if (!oid_oidcmp(p->output_format, yaz_oid_recsyn_sutrs))
 676     {
 677         xmlChar *buf_out;
 678         int len_out;
 679
 680         if (schema->stylesheet_xsp)
 681             xsltSaveResultToString(&buf_out, &len_out, resDoc,
 682                                    schema->stylesheet_xsp);
 683         else
 684             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 685
 686         p->output_format = yaz_oid_recsyn_sutrs;
 687         p->rec_len = len_out;
 688         p->rec_buf = odr_malloc(p->odr, p->rec_len);
 689         memcpy(p->rec_buf, buf_out, p->rec_len);
 690
 691         xmlFree(buf_out);
 692     }
 693     else
 694     {
 695         p->diagnostic = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 696     }
 697     xmlFreeDoc(resDoc);
 698     return 0;
 699 }
 700
 701 static struct recType filter_type = {
 702     0,
 703     "alvis",
 704     filter_init,
 705     filter_config,
 706     filter_destroy,
 707     filter_extract,
 708     filter_retrieve
 709 };
 710
 711 RecType
 712 #ifdef IDZEBRA_STATIC_ALVIS
 713 idzebra_filter_alvis
 714 #else
 715 idzebra_filter
 716 #endif
 717
 718 [] = {
 719     &filter_type,
 720     0,
 721 };
 722 /*
 723  * Local variables:
 724  * c-basic-offset: 4
 725  * c-file-style: "Stroustrup"
 726  * indent-tabs-mode: nil
 727  * End:
 728  * vim: shiftwidth=4 tabstop=8 expandtab
 729  */
 730