index/mod_alvis.c

   1 /* This file is part of the Zebra server.
   2    Copyright (C) 1994-2011 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 #if HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  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_str(const char **params, const char *name,
  76                           const char *value, ODR odr)
  77 {
  78     char *quoted = odr_malloc(odr, 3 + strlen(value));
  79     sprintf(quoted, "'%s'", value);
  80     while (*params)
  81         params++;
  82     params[0] = name;
  83     params[1] = quoted;
  84     params[2] = 0;
  85 }
  86
  87 static void set_param_int(const char **params, const char *name,
  88                           zint value, ODR odr)
  89 {
  90     char *quoted = odr_malloc(odr, 30); /* 25 digits enough for 2^64 */
  91     while (*params)
  92         params++;
  93     sprintf(quoted, "'" ZINT_FORMAT "'", value);
  94     params[0] = name;
  95     params[1] = quoted;
  96     params[2] = 0;
  97 }
  98
  99 #define ENABLE_INPUT_CALLBACK 0
 100
 101 #if ENABLE_INPUT_CALLBACK
 102 static int zebra_xmlInputMatchCallback (char const *filename)
 103 {
 104     yaz_log(YLOG_LOG, "match %s", filename);
 105     return 0;
 106 }
 107
 108 static void * zebra_xmlInputOpenCallback (char const *filename)
 109 {
 110     return 0;
 111 }
 112
 113 static int zebra_xmlInputReadCallback (void * context, char * buffer, int len)
 114 {
 115     return 0;
 116 }
 117
 118 static int zebra_xmlInputCloseCallback (void * context)
 119 {
 120     return 0;
 121 }
 122 #endif
 123
 124 static void *filter_init(Res res, RecType recType)
 125 {
 126     struct filter_info *tinfo = (struct filter_info *) xmalloc(sizeof(*tinfo));
 127     tinfo->reader = 0;
 128     tinfo->fname = 0;
 129     tinfo->full_name = 0;
 130     tinfo->profile_path = 0;
 131     tinfo->split_level = 0;
 132     tinfo->split_path = 0;
 133     tinfo->odr = odr_createmem(ODR_ENCODE);
 134     tinfo->doc = 0;
 135     tinfo->schemas = 0;
 136
 137 #if YAZ_HAVE_EXSLT
 138     exsltRegisterAll();
 139 #endif
 140
 141 #if ENABLE_INPUT_CALLBACK
 142     xmlRegisterDefaultInputCallbacks();
 143     xmlRegisterInputCallbacks(zebra_xmlInputMatchCallback,
 144                               zebra_xmlInputOpenCallback,
 145                               zebra_xmlInputReadCallback,
 146                               zebra_xmlInputCloseCallback);
 147 #endif
 148     return tinfo;
 149 }
 150
 151 static int attr_content(struct _xmlAttr *attr, const char *name,
 152                         const char **dst_content)
 153 {
 154     if (!XML_STRCMP(attr->name, name) && attr->children
 155         && attr->children->type == XML_TEXT_NODE)
 156     {
 157         *dst_content = (const char *)(attr->children->content);
 158         return 1;
 159     }
 160     return 0;
 161 }
 162
 163 static void destroy_schemas(struct filter_info *tinfo)
 164 {
 165     struct filter_schema *schema = tinfo->schemas;
 166     while (schema)
 167     {
 168         struct filter_schema *schema_next = schema->next;
 169         if (schema->stylesheet_xsp)
 170             xsltFreeStylesheet(schema->stylesheet_xsp);
 171         xfree(schema);
 172         schema = schema_next;
 173     }
 174     tinfo->schemas = 0;
 175     xfree(tinfo->fname);
 176     if (tinfo->doc)
 177         xmlFreeDoc(tinfo->doc);
 178     tinfo->doc = 0;
 179 }
 180
 181 static ZEBRA_RES create_schemas(struct filter_info *tinfo, const char *fname)
 182 {
 183     char tmp_full_name[1024];
 184     xmlNodePtr ptr;
 185     tinfo->fname = xstrdup(fname);
 186
 187     if (yaz_filepath_resolve(tinfo->fname, tinfo->profile_path,
 188                              NULL, tmp_full_name))
 189         tinfo->full_name = xstrdup(tmp_full_name);
 190     else
 191         tinfo->full_name = xstrdup(tinfo->fname);
 192
 193     yaz_log(YLOG_LOG, "alvis filter: loading config file %s", tinfo->full_name);
 194
 195     tinfo->doc = xmlParseFile(tinfo->full_name);
 196
 197     if (!tinfo->doc)
 198     {
 199         yaz_log(YLOG_WARN, "alvis filter: could not parse config file %s",
 200                 tinfo->full_name);
 201
 202         return ZEBRA_FAIL;
 203     }
 204
 205     ptr = xmlDocGetRootElement(tinfo->doc);
 206     if (!ptr || ptr->type != XML_ELEMENT_NODE
 207         || XML_STRCMP(ptr->name, "schemaInfo"))
 208     {
 209         yaz_log(YLOG_WARN,
 210                 "alvis filter:  config file %s :"
 211                 " expected root element <schemaInfo>",
 212                 tinfo->full_name);
 213         return ZEBRA_FAIL;
 214     }
 215
 216     for (ptr = ptr->children; ptr; ptr = ptr->next)
 217     {
 218         if (ptr->type != XML_ELEMENT_NODE)
 219             continue;
 220         if (!XML_STRCMP(ptr->name, "schema"))
 221         {
 222             struct _xmlAttr *attr;
 223             struct filter_schema *schema = xmalloc(sizeof(*schema));
 224             schema->name = 0;
 225             schema->identifier = 0;
 226             schema->stylesheet = 0;
 227             schema->default_schema = 0;
 228             schema->next = tinfo->schemas;
 229             schema->stylesheet_xsp = 0;
 230             tinfo->schemas = schema;
 231             for (attr = ptr->properties; attr; attr = attr->next)
 232             {
 233                 attr_content(attr, "identifier", &schema->identifier);
 234                 attr_content(attr, "name", &schema->name);
 235                 attr_content(attr, "stylesheet", &schema->stylesheet);
 236                 attr_content(attr, "default", &schema->default_schema);
 237             }
 238             /*yaz_log(YLOG_LOG, "XSLT add %s %s %s",
 239               schema->name, schema->identifier, schema->stylesheet); */
 240
 241             /* find requested schema */
 242
 243             if (schema->stylesheet)
 244             {
 245                 char tmp_xslt_full_name[1024];
 246                 if (!yaz_filepath_resolve(schema->stylesheet, tinfo->profile_path,
 247                                           NULL, tmp_xslt_full_name))
 248                 {
 249                     yaz_log(YLOG_WARN,
 250                             "alvis filter: stylesheet %s not found in path %s",
 251                             schema->stylesheet, tinfo->profile_path);
 252                     return ZEBRA_FAIL;
 253                 }
 254                 schema->stylesheet_xsp
 255                     = xsltParseStylesheetFile((const xmlChar*) tmp_xslt_full_name);
 256                 if (!schema->stylesheet_xsp)
 257                 {
 258                     yaz_log(YLOG_WARN,
 259                             "alvis filter: could not parse xslt stylesheet %s",
 260                             tmp_xslt_full_name);
 261                     return ZEBRA_FAIL;
 262                 }
 263             }
 264         }
 265         else if (!XML_STRCMP(ptr->name, "split"))
 266         {
 267             struct _xmlAttr *attr;
 268             for (attr = ptr->properties; attr; attr = attr->next)
 269             {
 270                 const char *split_level_str = 0;
 271                 attr_content(attr, "level", &split_level_str);
 272                 tinfo->split_level =
 273                     split_level_str ? atoi(split_level_str) : 0;
 274             }
 275         }
 276         else
 277         {
 278             yaz_log(YLOG_WARN, "Bad element %s in %s", ptr->name, fname);
 279             return ZEBRA_FAIL;
 280         }
 281     }
 282     return ZEBRA_OK;
 283 }
 284
 285 static struct filter_schema *lookup_schema(struct filter_info *tinfo,
 286                                            const char *est)
 287 {
 288     struct filter_schema *schema;
 289
 290     for (schema = tinfo->schemas; schema; schema = schema->next)
 291     {
 292         /* find requested schema */
 293         if (est)
 294         {
 295             if (schema->identifier && !strcmp(schema->identifier, est))
 296                 return schema;
 297
 298             if (schema->name && !strcmp(schema->name, est))
 299                 return schema;
 300         }
 301         /* or return default schema if defined */
 302         else if (schema->default_schema)
 303             return schema;
 304     }
 305
 306     /* return first schema if no default schema defined */
 307     if (tinfo->schemas)
 308         return tinfo->schemas;
 309
 310     return 0;
 311 }
 312
 313 static ZEBRA_RES filter_config(void *clientData, Res res, const char *args)
 314 {
 315     struct filter_info *tinfo = clientData;
 316     if (!args || !*args)
 317     {
 318         yaz_log(YLOG_WARN, "alvis filter: need config file");
 319         return ZEBRA_FAIL;
 320     }
 321
 322     if (tinfo->fname && !strcmp(args, tinfo->fname))
 323         return ZEBRA_OK;
 324
 325     tinfo->profile_path = res_get(res, "profilePath");
 326     yaz_log(YLOG_LOG, "alvis filter: profilePath %s", tinfo->profile_path);
 327
 328     destroy_schemas(tinfo);
 329     return create_schemas(tinfo, args);
 330 }
 331
 332 static void filter_destroy(void *clientData)
 333 {
 334     struct filter_info *tinfo = clientData;
 335     destroy_schemas(tinfo);
 336     xfree(tinfo->full_name);
 337     if (tinfo->reader)
 338         xmlFreeTextReader(tinfo->reader);
 339     odr_destroy(tinfo->odr);
 340     xfree(tinfo);
 341 }
 342
 343 static int ioread_ex(void *context, char *buffer, int len)
 344 {
 345     struct recExtractCtrl *p = context;
 346     return p->stream->readf(p->stream, buffer, len);
 347 }
 348
 349 static int ioclose_ex(void *context)
 350 {
 351     return 0;
 352 }
 353
 354 static void index_cdata(struct filter_info *tinfo, struct recExtractCtrl *ctrl,
 355                         xmlNodePtr ptr, RecWord *recWord)
 356 {
 357     for(; ptr; ptr = ptr->next)
 358     {
 359         index_cdata(tinfo, ctrl, ptr->children, recWord);
 360         if (ptr->type != XML_TEXT_NODE)
 361             continue;
 362         recWord->term_buf = (const char *)ptr->content;
 363         recWord->term_len = XML_STRLEN(ptr->content);
 364         (*ctrl->tokenAdd)(recWord);
 365     }
 366 }
 367
 368 static void index_node(struct filter_info *tinfo,  struct recExtractCtrl *ctrl,
 369                        xmlNodePtr ptr, RecWord *recWord)
 370 {
 371     for(; ptr; ptr = ptr->next)
 372     {
 373         index_node(tinfo, ctrl, ptr->children, recWord);
 374         if (ptr->type != XML_ELEMENT_NODE || !ptr->ns ||
 375             XML_STRCMP(ptr->ns->href, zebra_xslt_ns))
 376             continue;
 377         if (!XML_STRCMP(ptr->name, "index"))
 378         {
 379             const char *name_str = 0;
 380             const char *type_str = 0;
 381             const char *xpath_str = 0;
 382             struct _xmlAttr *attr;
 383             for (attr = ptr->properties; attr; attr = attr->next)
 384             {
 385                 attr_content(attr, "name", &name_str);
 386                 attr_content(attr, "xpath", &xpath_str);
 387                 attr_content(attr, "type", &type_str);
 388             }
 389             if (name_str)
 390             {
 391                 const char *prev_type = recWord->index_type; /* save default type */
 392
 393                 if (type_str && *type_str)
 394                     recWord->index_type = (const char *) type_str; /* type was given */
 395                 recWord->index_name = name_str;
 396                 index_cdata(tinfo, ctrl, ptr->children, recWord);
 397
 398                 recWord->index_type = prev_type;     /* restore it again */
 399             }
 400         }
 401     }
 402 }
 403
 404 static void index_record(struct filter_info *tinfo,struct recExtractCtrl *ctrl,
 405                          xmlNodePtr ptr, RecWord *recWord)
 406 {
 407     const char *type_str = "update";
 408
 409     if (ptr && ptr->type == XML_ELEMENT_NODE && ptr->ns &&
 410         !XML_STRCMP(ptr->ns->href, zebra_xslt_ns)
 411         && !XML_STRCMP(ptr->name, "record"))
 412     {
 413         const char *id_str = 0;
 414         const char *rank_str = 0;
 415         struct _xmlAttr *attr;
 416         for (attr = ptr->properties; attr; attr = attr->next)
 417         {
 418             attr_content(attr, "type", &type_str);
 419             attr_content(attr, "id", &id_str);
 420             attr_content(attr, "rank", &rank_str);
 421         }
 422         if (id_str)
 423             sscanf(id_str, "%255s", ctrl->match_criteria);
 424
 425         if (rank_str)
 426             ctrl->staticrank = atozint(rank_str);
 427         ptr = ptr->children;
 428     }
 429
 430     if (!strcmp("update", type_str))
 431         index_node(tinfo, ctrl, ptr, recWord);
 432     else if (!strcmp("delete", type_str))
 433          yaz_log(YLOG_WARN, "alvis filter delete: to be implemented");
 434     else
 435          yaz_log(YLOG_WARN, "alvis filter: unknown record type '%s'",
 436                  type_str);
 437 }
 438
 439 static int extract_doc(struct filter_info *tinfo, struct recExtractCtrl *p,
 440                        xmlDocPtr doc)
 441 {
 442     RecWord recWord;
 443     const char *params[10];
 444     xmlChar *buf_out;
 445     int len_out;
 446
 447     struct filter_schema *schema = lookup_schema(tinfo, zebra_xslt_ns);
 448
 449     params[0] = 0;
 450     set_param_str(params, "schema", zebra_xslt_ns, tinfo->odr);
 451
 452     (*p->init)(p, &recWord);
 453
 454     if (schema && schema->stylesheet_xsp)
 455     {
 456         xmlNodePtr root_ptr;
 457         xmlDocPtr resDoc =
 458             xsltApplyStylesheet(schema->stylesheet_xsp,
 459                                 doc, params);
 460         if (p->flagShowRecords)
 461         {
 462             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 463             fwrite(buf_out, len_out, 1, stdout);
 464             xmlFree(buf_out);
 465         }
 466         root_ptr = xmlDocGetRootElement(resDoc);
 467         if (root_ptr)
 468             index_record(tinfo, p, root_ptr, &recWord);
 469         else
 470         {
 471             yaz_log(YLOG_WARN, "No root for index XML record."
 472                     " split_level=%d stylesheet=%s",
 473                     tinfo->split_level, schema->stylesheet);
 474         }
 475         xmlFreeDoc(resDoc);
 476     }
 477     xmlDocDumpMemory(doc, &buf_out, &len_out);
 478     if (p->flagShowRecords)
 479         fwrite(buf_out, len_out, 1, stdout);
 480     if (p->setStoreData)
 481         (*p->setStoreData)(p, buf_out, len_out);
 482     xmlFree(buf_out);
 483
 484     xmlFreeDoc(doc);
 485     return RECCTRL_EXTRACT_OK;
 486 }
 487
 488 static int extract_split(struct filter_info *tinfo, struct recExtractCtrl *p)
 489 {
 490     int ret;
 491
 492     if (p->first_record)
 493     {
 494         if (tinfo->reader)
 495             xmlFreeTextReader(tinfo->reader);
 496         tinfo->reader = xmlReaderForIO(ioread_ex, ioclose_ex,
 497                                        p /* I/O handler */,
 498                                        0 /* URL */,
 499                                        0 /* encoding */,
 500                                        XML_PARSE_XINCLUDE
 501                                        | XML_PARSE_NOENT
 502                                        | XML_PARSE_NONET);
 503     }
 504     if (!tinfo->reader)
 505         return RECCTRL_EXTRACT_ERROR_GENERIC;
 506
 507     ret = xmlTextReaderRead(tinfo->reader);
 508     while (ret == 1)
 509     {
 510         int type = xmlTextReaderNodeType(tinfo->reader);
 511         int depth = xmlTextReaderDepth(tinfo->reader);
 512         if (type == XML_READER_TYPE_ELEMENT && tinfo->split_level == depth)
 513         {
 514             xmlNodePtr ptr = xmlTextReaderExpand(tinfo->reader);
 515             if (ptr)
 516             {
 517                 xmlNodePtr ptr2 = xmlCopyNode(ptr, 1);
 518                 xmlDocPtr doc = xmlNewDoc((const xmlChar*) "1.0");
 519
 520                 xmlDocSetRootElement(doc, ptr2);
 521
 522                 return extract_doc(tinfo, p, doc);
 523             }
 524             else
 525             {
 526                 xmlFreeTextReader(tinfo->reader);
 527                 tinfo->reader = 0;
 528                 return RECCTRL_EXTRACT_ERROR_GENERIC;
 529             }
 530         }
 531         ret = xmlTextReaderRead(tinfo->reader);
 532     }
 533     xmlFreeTextReader(tinfo->reader);
 534     tinfo->reader = 0;
 535     return RECCTRL_EXTRACT_EOF;
 536 }
 537
 538 static int extract_full(struct filter_info *tinfo, struct recExtractCtrl *p)
 539 {
 540     if (p->first_record) /* only one record per stream */
 541     {
 542        xmlDocPtr doc = xmlReadIO(ioread_ex, ioclose_ex, p /* I/O handler */,
 543                                  0 /* URL */,
 544                                  0 /* encoding */,
 545                                  XML_PARSE_XINCLUDE
 546                                  | XML_PARSE_NOENT
 547                                  | XML_PARSE_NONET);
 548        if (!doc)
 549            return RECCTRL_EXTRACT_ERROR_GENERIC;
 550        /* else {
 551            xmlNodePtr root = xmlDocGetRootElement(doc);
 552             if (!root)
 553                 return RECCTRL_EXTRACT_ERROR_GENERIC;
 554                 } */
 555
 556        return extract_doc(tinfo, p, doc);
 557     }
 558     else
 559        return RECCTRL_EXTRACT_EOF;
 560 }
 561
 562 static int filter_extract(void *clientData, struct recExtractCtrl *p)
 563 {
 564     struct filter_info *tinfo = clientData;
 565
 566     odr_reset(tinfo->odr);
 567     if (tinfo->split_level == 0 || p->setStoreData == 0)
 568         return extract_full(tinfo, p);
 569     else
 570         return extract_split(tinfo, p);
 571 }
 572
 573 static int ioread_ret(void *context, char *buffer, int len)
 574 {
 575     struct recRetrieveCtrl *p = context;
 576     return p->stream->readf(p->stream, buffer, len);
 577 }
 578
 579 static int ioclose_ret(void *context)
 580 {
 581     return 0;
 582 }
 583
 584 static int filter_retrieve (void *clientData, struct recRetrieveCtrl *p)
 585 {
 586     /* const char *esn = zebra_xslt_ns; */
 587     const char *esn = 0;
 588     const char *params[32];
 589     struct filter_info *tinfo = clientData;
 590     xmlDocPtr resDoc;
 591     xmlDocPtr doc;
 592     struct filter_schema *schema;
 593
 594     if (p->comp)
 595     {
 596         if (p->comp->which == Z_RecordComp_simple
 597             && p->comp->u.simple->which == Z_ElementSetNames_generic)
 598         {
 599             esn = p->comp->u.simple->u.generic;
 600         }
 601         else if (p->comp->which == Z_RecordComp_complex
 602                  && p->comp->u.complex->generic->elementSpec
 603                  && p->comp->u.complex->generic->elementSpec->which ==
 604                  Z_ElementSpec_elementSetName)
 605         {
 606             esn = p->comp->u.complex->generic->elementSpec->u.elementSetName;
 607         }
 608     }
 609     schema = lookup_schema(tinfo, esn);
 610     if (!schema)
 611     {
 612         p->diagnostic =
 613             YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 614         return 0;
 615     }
 616
 617     params[0] = 0;
 618     set_param_int(params, "id", p->localno, p->odr);
 619     if (p->fname)
 620         set_param_str(params, "filename", p->fname, p->odr);
 621     if (p->staticrank >= 0)
 622         set_param_int(params, "rank", p->staticrank, p->odr);
 623
 624     if (esn)
 625         set_param_str(params, "schema", esn, p->odr);
 626     else
 627         if (schema->name)
 628             set_param_str(params, "schema", schema->name, p->odr);
 629         else if (schema->identifier)
 630             set_param_str(params, "schema", schema->identifier, p->odr);
 631         else
 632             set_param_str(params, "schema", "", p->odr);
 633
 634     if (p->score >= 0)
 635         set_param_int(params, "score", p->score, p->odr);
 636     set_param_int(params, "size", p->recordSize, p->odr);
 637
 638     doc = xmlReadIO(ioread_ret, ioclose_ret, p /* I/O handler */,
 639                     0 /* URL */,
 640                     0 /* encoding */,
 641                     XML_PARSE_XINCLUDE | XML_PARSE_NOENT | XML_PARSE_NONET);
 642     if (!doc)
 643     {
 644         p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 645         return 0;
 646     }
 647
 648     if (!schema->stylesheet_xsp)
 649         resDoc = doc;
 650     else
 651     {
 652         resDoc = xsltApplyStylesheet(schema->stylesheet_xsp,
 653                                      doc, params);
 654         xmlFreeDoc(doc);
 655     }
 656     if (!resDoc)
 657     {
 658         p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 659     }
 660     else if (!p->input_format
 661              || !oid_oidcmp(p->input_format, yaz_oid_recsyn_xml))
 662     {
 663         xmlChar *buf_out;
 664         int len_out;
 665
 666         if (schema->stylesheet_xsp)
 667             xsltSaveResultToString(&buf_out, &len_out, resDoc,
 668                                    schema->stylesheet_xsp);
 669         else
 670             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 671
 672         p->output_format = yaz_oid_recsyn_xml;
 673         p->rec_len = len_out;
 674         p->rec_buf = odr_malloc(p->odr, p->rec_len);
 675         memcpy(p->rec_buf, buf_out, p->rec_len);
 676         xmlFree(buf_out);
 677     }
 678     else if (!oid_oidcmp(p->output_format, yaz_oid_recsyn_sutrs))
 679     {
 680         xmlChar *buf_out;
 681         int len_out;
 682
 683         if (schema->stylesheet_xsp)
 684             xsltSaveResultToString(&buf_out, &len_out, resDoc,
 685                                    schema->stylesheet_xsp);
 686         else
 687             xmlDocDumpMemory(resDoc, &buf_out, &len_out);
 688
 689         p->output_format = yaz_oid_recsyn_sutrs;
 690         p->rec_len = len_out;
 691         p->rec_buf = odr_malloc(p->odr, p->rec_len);
 692         memcpy(p->rec_buf, buf_out, p->rec_len);
 693
 694         xmlFree(buf_out);
 695     }
 696     else
 697     {
 698         p->diagnostic = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 699     }
 700     xmlFreeDoc(resDoc);
 701     return 0;
 702 }
 703
 704 static struct recType filter_type = {
 705     0,
 706     "alvis",
 707     filter_init,
 708     filter_config,
 709     filter_destroy,
 710     filter_extract,
 711     filter_retrieve
 712 };
 713
 714 RecType
 715 #if IDZEBRA_STATIC_ALVIS
 716 idzebra_filter_alvis
 717 #else
 718 idzebra_filter
 719 #endif
 720
 721 [] = {
 722     &filter_type,
 723     0,
 724 };
 725 /*
 726  * Local variables:
 727  * c-basic-offset: 4
 728  * c-file-style: "Stroustrup"
 729  * indent-tabs-mode: nil
 730  * End:
 731  * vim: shiftwidth=4 tabstop=8 expandtab
 732  */
 733