index/mod_dom.c

   1 /* This file is part of the Zebra server.
   2    Copyright (C) 1995-2008 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 #include <stdarg.h>
  24
  25 #include <yaz/diagbib1.h>
  26 #include <yaz/tpath.h>
  27 #include <yaz/snprintf.h>
  28
  29 #include <libxml/xmlversion.h>
  30 #include <libxml/parser.h>
  31 #include <libxml/tree.h>
  32 #include <libxml/xmlIO.h>
  33 #include <libxml/xmlreader.h>
  34 #include <libxslt/transform.h>
  35 #include <libxslt/xsltutils.h>
  36
  37 #if YAZ_HAVE_EXSLT
  38 #include <libexslt/exslt.h>
  39 #endif
  40
  41 #include <idzebra/util.h>
  42 #include <idzebra/recctrl.h>
  43 #include <yaz/oid_db.h>
  44
  45 /* DOM filter style indexing */
  46 #define ZEBRA_DOM_NS "http://indexdata.com/zebra-2.0"
  47 static const char *zebra_dom_ns = ZEBRA_DOM_NS;
  48
  49 /* DOM filter style indexing */
  50 #define ZEBRA_PI_NAME "zebra-2.0"
  51 static const char *zebra_pi_name = ZEBRA_PI_NAME;
  52
  53 enum convert_type {
  54     convert_xslt_type,
  55     convert_meta_type
  56 };
  57
  58 struct convert_xslt {
  59     const char *stylesheet;
  60     xsltStylesheetPtr stylesheet_xsp;
  61 };
  62
  63 struct convert_meta {
  64     int dummy;
  65 };
  66
  67 struct convert_s {
  68     enum convert_type which;
  69     union {
  70         struct convert_xslt xslt;
  71         struct convert_meta meta;
  72     } u;
  73     struct convert_s *next;
  74 };
  75
  76 struct filter_extract {
  77     const char *name;
  78     struct convert_s *convert;
  79 };
  80
  81 struct filter_store {
  82     struct convert_s *convert;
  83 };
  84
  85 struct filter_retrieve {
  86     const char *name;
  87     const char *identifier;
  88     struct convert_s *convert;
  89     struct filter_retrieve *next;
  90 };
  91
  92 #define DOM_INPUT_XMLREADER 1
  93 #define DOM_INPUT_MARC 2
  94 struct filter_input {
  95     const char *syntax;
  96     const char *name;
  97     struct convert_s *convert;
  98     int type;
  99     union {
 100         struct {
 101             xmlTextReaderPtr reader;
 102             int split_level;
 103         } xmlreader;
 104         struct {
 105             const char *input_charset;
 106             yaz_marc_t handle;
 107             yaz_iconv_t iconv;
 108         } marc;
 109     } u;
 110     struct filter_input *next;
 111 };
 112
 113 struct filter_info {
 114     char *fname;
 115     char *full_name;
 116     const char *profile_path;
 117     NMEM nmem_record;
 118     NMEM nmem_config;
 119     xmlDocPtr doc_config;
 120     struct filter_extract *extract;
 121     struct filter_retrieve *retrieve_list;
 122     struct filter_input *input_list;
 123     struct filter_store *store;
 124     int record_info_invoked;
 125 };
 126
 127
 128
 129 #define XML_STRCMP(a,b)   strcmp((char*)a, b)
 130 #define XML_STRLEN(a) strlen((char*)a)
 131
 132
 133 #define FOR_EACH_ELEMENT(ptr) for (; ptr; ptr = ptr->next) if (ptr->type == XML_ELEMENT_NODE)
 134
 135 static void dom_log(int level, struct filter_info *tinfo, xmlNodePtr ptr,
 136                     const char *fmt, ...)
 137 #ifdef __GNUC__
 138     __attribute__ ((format (printf, 4, 5)))
 139 #endif
 140     ;
 141
 142 static void dom_log(int level, struct filter_info *tinfo, xmlNodePtr ptr,
 143                     const char *fmt, ...)
 144 {
 145     va_list ap;
 146     char buf[4096];
 147
 148     va_start(ap, fmt);
 149     yaz_vsnprintf(buf, sizeof(buf)-1, fmt, ap);
 150     if (ptr)
 151     {
 152         yaz_log(level, "%s:%ld: %s", tinfo->fname ? tinfo->fname : "none",
 153                 xmlGetLineNo(ptr), buf);
 154     }
 155     else
 156     {
 157         yaz_log(level, "%s: %s", tinfo->fname ? tinfo->fname : "none", buf);
 158     }
 159     va_end(ap);
 160 }
 161
 162
 163 static void set_param_str(const char **params, const char *name,
 164                           const char *value, NMEM nmem)
 165 {
 166     char *quoted = nmem_malloc(nmem, 3 + strlen(value));
 167     sprintf(quoted, "'%s'", value);
 168     while (*params)
 169         params++;
 170     params[0] = name;
 171     params[1] = quoted;
 172     params[2] = 0;
 173 }
 174
 175 static void set_param_int(const char **params, const char *name,
 176                           zint value, NMEM nmem)
 177 {
 178     char *quoted = nmem_malloc(nmem, 30); /* 25 digits enough for 2^64 */
 179     while (*params)
 180         params++;
 181     sprintf(quoted, "'" ZINT_FORMAT "'", value);
 182     params[0] = name;
 183     params[1] = quoted;
 184     params[2] = 0;
 185 }
 186
 187 static void *filter_init(Res res, RecType recType)
 188 {
 189     struct filter_info *tinfo = (struct filter_info *) xmalloc(sizeof(*tinfo));
 190     tinfo->fname = 0;
 191     tinfo->full_name = 0;
 192     tinfo->profile_path = 0;
 193     tinfo->nmem_record = nmem_create();
 194     tinfo->nmem_config = nmem_create();
 195     tinfo->extract = 0;
 196     tinfo->retrieve_list = 0;
 197     tinfo->input_list = 0;
 198     tinfo->store = 0;
 199     tinfo->doc_config = 0;
 200     tinfo->record_info_invoked = 0;
 201
 202 #if YAZ_HAVE_EXSLT
 203     exsltRegisterAll();
 204 #endif
 205
 206     return tinfo;
 207 }
 208
 209 static int attr_content(struct _xmlAttr *attr, const char *name,
 210                         const char **dst_content)
 211 {
 212     if (!XML_STRCMP(attr->name, name) && attr->children
 213         && attr->children->type == XML_TEXT_NODE)
 214     {
 215         *dst_content = (const char *)(attr->children->content);
 216         return 1;
 217     }
 218     return 0;
 219 }
 220
 221 static void destroy_xsp(struct convert_s *c)
 222 {
 223     while (c)
 224     {
 225         if (c->which == convert_xslt_type)
 226         {
 227             if (c->u.xslt.stylesheet_xsp)
 228                 xsltFreeStylesheet(c->u.xslt.stylesheet_xsp);
 229         }
 230         c = c->next;
 231     }
 232 }
 233
 234 static void destroy_dom(struct filter_info *tinfo)
 235 {
 236     if (tinfo->extract)
 237     {
 238         destroy_xsp(tinfo->extract->convert);
 239         tinfo->extract = 0;
 240     }
 241     if (tinfo->store)
 242     {
 243         destroy_xsp(tinfo->store->convert);
 244         tinfo->store = 0;
 245     }
 246     if (tinfo->input_list)
 247     {
 248         struct filter_input *i_ptr;
 249         for (i_ptr = tinfo->input_list; i_ptr; i_ptr = i_ptr->next)
 250         {
 251             switch(i_ptr->type)
 252             {
 253             case DOM_INPUT_XMLREADER:
 254                 if (i_ptr->u.xmlreader.reader)
 255                     xmlFreeTextReader(i_ptr->u.xmlreader.reader);
 256                 break;
 257             case DOM_INPUT_MARC:
 258                 yaz_iconv_close(i_ptr->u.marc.iconv);
 259                 yaz_marc_destroy(i_ptr->u.marc.handle);
 260                 break;
 261             }
 262             destroy_xsp(i_ptr->convert);
 263         }
 264         tinfo->input_list = 0;
 265     }
 266     if (tinfo->retrieve_list)
 267     {
 268         struct filter_retrieve *r_ptr;
 269         for (r_ptr = tinfo->retrieve_list; r_ptr; r_ptr = r_ptr->next)
 270             destroy_xsp(r_ptr->convert);
 271         tinfo->retrieve_list = 0;
 272     }
 273
 274     if (tinfo->doc_config)
 275     {
 276         xmlFreeDoc(tinfo->doc_config);
 277         tinfo->doc_config = 0;
 278     }
 279     nmem_reset(tinfo->nmem_config);
 280 }
 281
 282 static ZEBRA_RES parse_convert(struct filter_info *tinfo, xmlNodePtr ptr,
 283                                struct convert_s **l)
 284 {
 285     *l = 0;
 286     FOR_EACH_ELEMENT(ptr) {
 287         if (!XML_STRCMP(ptr->name, "xslt"))
 288         {
 289             struct _xmlAttr *attr;
 290             struct convert_s *p = nmem_malloc(tinfo->nmem_config, sizeof(*p));
 291
 292             p->next = 0;
 293             p->which = convert_xslt_type;
 294             p->u.xslt.stylesheet = 0;
 295             p->u.xslt.stylesheet_xsp = 0;
 296
 297             for (attr = ptr->properties; attr; attr = attr->next)
 298                 if (attr_content(attr, "stylesheet", &p->u.xslt.stylesheet))
 299                     ;
 300                 else
 301                 {
 302                     dom_log(YLOG_WARN, tinfo, ptr,
 303                             "bad attribute @%s", attr->name);
 304                 }
 305             if (p->u.xslt.stylesheet)
 306             {
 307                 char tmp_xslt_full_name[1024];
 308                 if (!yaz_filepath_resolve(p->u.xslt.stylesheet,
 309                                           tinfo->profile_path,
 310                                           NULL,
 311                                           tmp_xslt_full_name))
 312                 {
 313                     dom_log(YLOG_WARN, tinfo, 0,
 314                             "stylesheet %s not found in "
 315                             "path %s",
 316                             p->u.xslt.stylesheet,
 317                             tinfo->profile_path);
 318                     return ZEBRA_FAIL;
 319                 }
 320
 321                 p->u.xslt.stylesheet_xsp
 322                     = xsltParseStylesheetFile((const xmlChar*)
 323                                               tmp_xslt_full_name);
 324                 if (!p->u.xslt.stylesheet_xsp)
 325                 {
 326                     dom_log(YLOG_WARN, tinfo, 0,
 327                             "could not parse xslt stylesheet %s",
 328                             tmp_xslt_full_name);
 329                     return ZEBRA_FAIL;
 330                 }
 331             }
 332             else
 333             {
 334                 dom_log(YLOG_WARN, tinfo, ptr,
 335                         "missing attribute 'stylesheet'");
 336                 return ZEBRA_FAIL;
 337             }
 338             *l = p;
 339             l = &p->next;
 340         }
 341         else if (!XML_STRCMP(ptr->name, "meta"))
 342         {
 343             struct _xmlAttr *attr;
 344             struct convert_s *p = nmem_malloc(tinfo->nmem_config, sizeof(*p));
 345
 346             p->next = 0;
 347             p->which = convert_meta_type;
 348
 349             for (attr = ptr->properties; attr; attr = attr->next)
 350                 dom_log(YLOG_WARN, tinfo, ptr,
 351                         "bad attribute @%s", attr->name);
 352             *l = p;
 353             l = &p->next;
 354         }
 355         else
 356         {
 357             dom_log(YLOG_WARN, tinfo, ptr,
 358                     "bad element '%s', expected <xslt>", ptr->name);
 359             return ZEBRA_FAIL;
 360         }
 361     }
 362     return ZEBRA_OK;
 363 }
 364
 365 static int process_meta(struct filter_info *tinfo, xmlDocPtr doc, xmlNodePtr node,
 366                         struct recRetrieveCtrl *retctr)
 367 {
 368
 369     if (node->type == XML_ELEMENT_NODE && node->ns && node->ns->href &&
 370         0 == XML_STRCMP(node->ns->href, zebra_dom_ns))
 371     {
 372         if (0 == XML_STRCMP(node->name, "meta"))
 373         {
 374             const char *element_set_name = 0;
 375
 376             struct _xmlAttr *attr;
 377             for (attr = node->properties; attr; attr = attr->next)
 378             {
 379                 if (attr_content(attr, "element_set_name", &element_set_name))
 380                     ;
 381                 else
 382                 {
 383                     dom_log(YLOG_WARN, tinfo, node,
 384                             "bad attribute @%s, expected @element_set_name",
 385                             attr->name);
 386                 }
 387             }
 388             if (element_set_name)
 389             {
 390                 WRBUF result = wrbuf_alloc();
 391                 WRBUF addinfo = wrbuf_alloc();
 392                 const Odr_oid *input_format = yaz_oid_recsyn_xml;
 393                 const Odr_oid *output_format = 0;
 394                 int ret;
 395
 396                 ret = retctr->special_fetch(retctr->handle,
 397                                             element_set_name,
 398                                             input_format, &output_format,
 399                                             result, addinfo);
 400                 if (ret == 0)
 401                 {
 402                     xmlDocPtr sub_doc =
 403                         xmlParseMemory(    wrbuf_buf(result), wrbuf_len(result));
 404                     if (sub_doc)
 405                     {
 406                         xmlNodePtr t = xmlDocGetRootElement(sub_doc);
 407                         xmlAddChild(node, xmlCopyNode(t, 1));
 408                         xmlFreeDoc(sub_doc);
 409                     }
 410                 }
 411                 wrbuf_destroy(result);
 412                 wrbuf_destroy(addinfo);
 413             }
 414         }
 415     }
 416     for (node = node->children; node; node = node->next)
 417         process_meta(tinfo, doc, node, retctr);
 418     return 0;
 419 }
 420
 421 static ZEBRA_RES perform_convert(struct filter_info *tinfo,
 422                                  struct recExtractCtrl *extctr,
 423                                  struct recRetrieveCtrl *retctr,
 424                                  struct convert_s *convert,
 425                                  const char **params,
 426                                  xmlDocPtr *doc,
 427                                  xsltStylesheetPtr *last_xsp)
 428 {
 429     for (; convert; convert = convert->next)
 430     {
 431         if (convert->which == convert_xslt_type)
 432         {
 433             xmlChar *buf_out = 0;
 434             int len_out = 0;
 435             xmlDocPtr res_doc = xsltApplyStylesheet(convert->u.xslt.stylesheet_xsp,
 436                                                     *doc, params);
 437             if (last_xsp)
 438                 *last_xsp = convert->u.xslt.stylesheet_xsp;
 439
 440             if (!res_doc)
 441                 break;
 442
 443             /* now saving into buffer and re-reading into DOM to avoid annoing
 444                XSLT problem with thrown-out indentation text nodes */
 445             xsltSaveResultToString(&buf_out, &len_out, res_doc,
 446                                    convert->u.xslt.stylesheet_xsp);
 447             xmlFreeDoc(res_doc);
 448
 449             xmlFreeDoc(*doc);
 450
 451             *doc = xmlParseMemory((const char *) buf_out, len_out);
 452
 453             /* writing debug info out */
 454             if (extctr && extctr->flagShowRecords)
 455                 yaz_log(YLOG_LOG, "%s: XSLT %s\n %.*s",
 456                         tinfo->fname ? tinfo->fname : "(none)",
 457                         convert->u.xslt.stylesheet,
 458                         len_out, buf_out);
 459
 460             xmlFree(buf_out);
 461         }
 462         else if (convert->which == convert_meta_type)
 463         {
 464             if (retctr) /* only execute meta on retrieval */
 465             {
 466                 process_meta(tinfo, *doc, xmlDocGetRootElement(*doc), retctr);
 467
 468                 /* last stylesheet absent */
 469                 if (last_xsp)
 470                     *last_xsp = 0;
 471             }
 472         }
 473     }
 474     return ZEBRA_OK;
 475 }
 476
 477 static struct filter_input *new_input(struct filter_info *tinfo, int type)
 478 {
 479     struct filter_input *p;
 480     struct filter_input **np = &tinfo->input_list;
 481     for (;*np; np = &(*np)->next)
 482         ;
 483     p = *np = nmem_malloc(tinfo->nmem_config, sizeof(*p));
 484     p->next = 0;
 485     p->syntax = 0;
 486     p->name = 0;
 487     p->convert = 0;
 488     p->type = type;
 489     return p;
 490 }
 491
 492 static ZEBRA_RES parse_input(struct filter_info *tinfo, xmlNodePtr ptr,
 493                              const char *syntax, const char *name)
 494 {
 495     FOR_EACH_ELEMENT(ptr) {
 496         if (!XML_STRCMP(ptr->name, "marc"))
 497         {
 498             yaz_iconv_t iconv = 0;
 499             const char *input_charset = "marc-8";
 500             struct _xmlAttr *attr;
 501
 502             for (attr = ptr->properties; attr; attr = attr->next)
 503             {
 504                 if (attr_content(attr, "inputcharset", &input_charset))
 505                     ;
 506                 else
 507                 {
 508                     dom_log(YLOG_WARN, tinfo, ptr,
 509                             "bad attribute @%s, expected @inputcharset",
 510                             attr->name);
 511                 }
 512             }
 513             iconv = yaz_iconv_open("utf-8", input_charset);
 514             if (!iconv)
 515             {
 516                 dom_log(YLOG_WARN, tinfo, ptr,
 517                         "unsupported @charset '%s'", input_charset);
 518                 return ZEBRA_FAIL;
 519             }
 520             else
 521             {
 522                 struct filter_input *p
 523                     = new_input(tinfo, DOM_INPUT_MARC);
 524                 p->u.marc.handle = yaz_marc_create();
 525                 p->u.marc.iconv = iconv;
 526
 527                 yaz_marc_iconv(p->u.marc.handle, p->u.marc.iconv);
 528
 529                 ptr = ptr->next;
 530
 531                 parse_convert(tinfo, ptr, &p->convert);
 532             }
 533             break;
 534
 535         }
 536         else if (!XML_STRCMP(ptr->name, "xmlreader"))
 537         {
 538             struct filter_input *p
 539                 = new_input(tinfo, DOM_INPUT_XMLREADER);
 540             struct _xmlAttr *attr;
 541             const char *level_str = 0;
 542
 543             p->u.xmlreader.split_level = 0;
 544             p->u.xmlreader.reader = 0;
 545
 546             for (attr = ptr->properties; attr; attr = attr->next)
 547             {
 548                 if (attr_content(attr, "level", &level_str))
 549                     ;
 550                 else
 551                 {
 552                     dom_log(YLOG_WARN, tinfo, ptr,
 553                             "bad attribute @%s, expected @level",
 554                             attr->name);
 555                 }
 556             }
 557             if (level_str)
 558                 p->u.xmlreader.split_level = atoi(level_str);
 559
 560             ptr = ptr->next;
 561
 562             parse_convert(tinfo, ptr, &p->convert);
 563             break;
 564         }
 565         else
 566         {
 567             dom_log(YLOG_WARN, tinfo, ptr,
 568                     "bad element <%s>, expected <marc>|<xmlreader>",
 569                     ptr->name);
 570             return ZEBRA_FAIL;
 571         }
 572     }
 573     return ZEBRA_OK;
 574 }
 575
 576 static ZEBRA_RES parse_dom(struct filter_info *tinfo, const char *fname)
 577 {
 578     char tmp_full_name[1024];
 579     xmlNodePtr ptr;
 580     xmlDocPtr doc;
 581
 582     tinfo->fname = nmem_strdup(tinfo->nmem_config, fname);
 583
 584     if (yaz_filepath_resolve(tinfo->fname, tinfo->profile_path,
 585                              NULL, tmp_full_name))
 586         tinfo->full_name = nmem_strdup(tinfo->nmem_config, tmp_full_name);
 587     else
 588         tinfo->full_name = nmem_strdup(tinfo->nmem_config, tinfo->fname);
 589
 590     yaz_log(YLOG_LOG, "%s dom filter: "
 591             "loading config file %s", tinfo->fname, tinfo->full_name);
 592
 593     doc = xmlParseFile(tinfo->full_name);
 594     if (!doc)
 595     {
 596         yaz_log(YLOG_WARN, "%s: dom filter: "
 597                 "failed to parse config file %s",
 598                 tinfo->fname, tinfo->full_name);
 599         return ZEBRA_FAIL;
 600     }
 601     /* save because we store ptrs to the content */
 602     tinfo->doc_config = doc;
 603
 604     ptr = xmlDocGetRootElement(doc);
 605     if (!ptr || ptr->type != XML_ELEMENT_NODE
 606         || XML_STRCMP(ptr->name, "dom"))
 607     {
 608         dom_log(YLOG_WARN, tinfo, ptr,
 609                 "bad root element <%s>, expected root element <dom>",
 610                 ptr->name);
 611         return ZEBRA_FAIL;
 612     }
 613
 614     ptr = ptr->children;
 615     FOR_EACH_ELEMENT(ptr) {
 616         if (!XML_STRCMP(ptr->name, "extract"))
 617         {
 618             /*
 619               <extract name="index">
 620               <xslt stylesheet="first.xsl"/>
 621               <xslt stylesheet="second.xsl"/>
 622               </extract>
 623             */
 624             struct _xmlAttr *attr;
 625             struct filter_extract *f =
 626                 nmem_malloc(tinfo->nmem_config, sizeof(*f));
 627
 628             tinfo->extract = f;
 629             f->name = 0;
 630             f->convert = 0;
 631             for (attr = ptr->properties; attr; attr = attr->next)
 632             {
 633                 if (attr_content(attr, "name", &f->name))
 634                     ;
 635                 else
 636                 {
 637                     dom_log(YLOG_WARN, tinfo, ptr,
 638                             "bad attribute @%s, expected @name",
 639                             attr->name);
 640                 }
 641             }
 642             parse_convert(tinfo, ptr->children, &f->convert);
 643         }
 644         else if (!XML_STRCMP(ptr->name, "retrieve"))
 645         {
 646             /*
 647                <retrieve name="F">
 648                <xslt stylesheet="some.xsl"/>
 649                <xslt stylesheet="some.xsl"/>
 650                </retrieve>
 651             */
 652             struct _xmlAttr *attr;
 653             struct filter_retrieve **fp = &tinfo->retrieve_list;
 654             struct filter_retrieve *f =
 655                 nmem_malloc(tinfo->nmem_config, sizeof(*f));
 656
 657             while (*fp)
 658                 fp = &(*fp)->next;
 659
 660             *fp = f;
 661             f->name = 0;
 662             f->identifier = 0;
 663             f->convert = 0;
 664             f->next = 0;
 665
 666             for (attr = ptr->properties; attr; attr = attr->next)
 667             {
 668                 if (attr_content(attr, "identifier",
 669                                  &f->identifier))
 670                     ;
 671                 else if (attr_content(attr, "name", &f->name))
 672                     ;
 673                 else
 674                 {
 675                     dom_log(YLOG_WARN, tinfo, ptr,
 676                             "bad attribute @%s,  expected @identifier|@name",
 677                             attr->name);
 678                 }
 679             }
 680             parse_convert(tinfo, ptr->children, &f->convert);
 681         }
 682         else if (!XML_STRCMP(ptr->name, "store"))
 683         {
 684             /*
 685               <store name="F">
 686               <xslt stylesheet="some.xsl"/>
 687               <xslt stylesheet="some.xsl"/>
 688               </retrieve>
 689             */
 690             struct filter_store *f =
 691                 nmem_malloc(tinfo->nmem_config, sizeof(*f));
 692
 693             tinfo->store = f;
 694             f->convert = 0;
 695             parse_convert(tinfo, ptr->children, &f->convert);
 696         }
 697         else if (!XML_STRCMP(ptr->name, "input"))
 698         {
 699             /*
 700               <input syntax="xml">
 701               <xmlreader level="1"/>
 702               </input>
 703               <input syntax="usmarc">
 704               <marc inputcharset="marc-8"/>
 705               </input>
 706             */
 707             struct _xmlAttr *attr;
 708             const char  *syntax = 0;
 709             const char *name = 0;
 710             for (attr = ptr->properties; attr; attr = attr->next)
 711             {
 712                 if (attr_content(attr, "syntax", &syntax))
 713                     ;
 714                 else if (attr_content(attr, "name", &name))
 715                     ;
 716                 else
 717                 {
 718                     dom_log(YLOG_WARN, tinfo, ptr,
 719                             "bad attribute @%s,  expected @syntax|@name",
 720                             attr->name);
 721                 }
 722             }
 723             parse_input(tinfo, ptr->children, syntax, name);
 724         }
 725         else
 726         {
 727             dom_log(YLOG_WARN, tinfo, ptr,
 728                     "bad element <%s>, "
 729                     "expected <extract>|<input>|<retrieve>|<store>",
 730                     ptr->name);
 731             return ZEBRA_FAIL;
 732         }
 733     }
 734     if (!tinfo->input_list)
 735     {
 736         struct filter_input *p
 737             = new_input(tinfo, DOM_INPUT_XMLREADER);
 738         p->u.xmlreader.split_level = 0;
 739         p->u.xmlreader.reader = 0;
 740     }
 741     return ZEBRA_OK;
 742 }
 743
 744 static struct filter_retrieve *lookup_retrieve(struct filter_info *tinfo,
 745                                                const char *est)
 746 {
 747     struct filter_retrieve *f = tinfo->retrieve_list;
 748
 749     /* return first schema if no est is provided */
 750     if (!est)
 751         return f;
 752     for (; f; f = f->next)
 753     {
 754         /* find requested schema */
 755         if (est)
 756         {
 757             if (f->identifier && !strcmp(f->identifier, est))
 758                 return f;
 759             if (f->name && !strcmp(f->name, est))
 760                 return f;
 761         }
 762     }
 763     return 0;
 764 }
 765
 766 static ZEBRA_RES filter_config(void *clientData, Res res, const char *args)
 767 {
 768     struct filter_info *tinfo = clientData;
 769     if (!args || !*args)
 770     {
 771         yaz_log(YLOG_WARN, "dom filter: need config file");
 772         return ZEBRA_FAIL;
 773     }
 774
 775     if (tinfo->fname && !strcmp(args, tinfo->fname))
 776         return ZEBRA_OK;
 777
 778     tinfo->profile_path = res_get(res, "profilePath");
 779
 780     destroy_dom(tinfo);
 781     return parse_dom(tinfo, args);
 782 }
 783
 784 static void filter_destroy(void *clientData)
 785 {
 786     struct filter_info *tinfo = clientData;
 787     destroy_dom(tinfo);
 788     nmem_destroy(tinfo->nmem_config);
 789     nmem_destroy(tinfo->nmem_record);
 790     xfree(tinfo);
 791 }
 792
 793 static int ioread_ex(void *context, char *buffer, int len)
 794 {
 795     struct recExtractCtrl *p = context;
 796     return p->stream->readf(p->stream, buffer, len);
 797 }
 798
 799 static int ioclose_ex(void *context)
 800 {
 801     return 0;
 802 }
 803
 804
 805
 806 /* DOM filter style indexing */
 807 static void index_value_of(struct filter_info *tinfo,
 808                            struct recExtractCtrl *extctr,
 809                            RecWord* recword,
 810                            xmlNodePtr node,
 811                            const char *index_p)
 812 {
 813     if (tinfo->record_info_invoked == 1)
 814     {
 815         xmlChar *text = xmlNodeGetContent(node);
 816         size_t text_len = strlen((const char *)text);
 817
 818         /* if there is no text, we do not need to proceed */
 819         if (text_len)
 820         {
 821             const char *look = index_p;
 822             const char *bval;
 823             const char *eval;
 824
 825             xmlChar index[256];
 826             xmlChar type[256];
 827
 828             /* assingning text to be indexed */
 829             recword->term_buf = (const char *)text;
 830             recword->term_len = text_len;
 831
 832             /* parsing all index name/type pairs */
 833             /* may not start with ' ' or ':' */
 834             while (*look && ' ' != *look && ':' != *look)
 835             {
 836                 /* setting name and type to zero */
 837                 *index = '\0';
 838                 *type = '\0';
 839
 840                 /* parsing one index name */
 841                 bval = look;
 842                 while (*look && ':' != *look && ' ' != *look)
 843                 {
 844                     look++;
 845                 }
 846                 eval = look;
 847                 strncpy((char *)index, (const char *)bval, eval - bval);
 848                 index[eval - bval] = '\0';
 849
 850
 851                 /* parsing one index type, if existing */
 852                 if (':' == *look)
 853                 {
 854                     look++;
 855
 856                     bval = look;
 857                     while (*look && ' ' != *look)
 858                     {
 859                         look++;
 860                     }
 861                     eval = look;
 862                     strncpy((char *)type, (const char *)bval, eval - bval);
 863                     type[eval - bval] = '\0';
 864                 }
 865
 866                 /* actually indexing the text given */
 867
 868                 recword->index_name = (const char *)index;
 869                 if (*type)
 870                     recword->index_type = (const char *) type;
 871
 872                 /* writing debug out */
 873                 if (extctr->flagShowRecords)
 874                     dom_log(YLOG_LOG, tinfo, 0,
 875                             "INDEX '%s:%s' '%s'",
 876                             (const char *) index,
 877                             (const char *) type,
 878                             (const char *) text);
 879
 880                 (extctr->tokenAdd)(recword);
 881
 882                 /* eat whitespaces */
 883                 if (*look && ' ' == *look)
 884                 {
 885                     look++;
 886                 }
 887             }
 888         }
 889         xmlFree(text);
 890     }
 891 }
 892
 893
 894 /* DOM filter style indexing */
 895 static void set_record_info(struct filter_info *tinfo,
 896                             struct recExtractCtrl *extctr,
 897                             xmlNodePtr node,
 898                             const char * id_p,
 899                             const char * rank_p,
 900                             const char * type_p)
 901 {
 902     /* writing debug info out */
 903     if (extctr && extctr->flagShowRecords)
 904         dom_log(YLOG_LOG, tinfo, node,
 905                 "RECORD id=%s rank=%s type=%s",
 906                 id_p ? (const char *) id_p : "(null)",
 907                 rank_p ? (const char *) rank_p : "(null)",
 908                 type_p ? (const char *) type_p : "(null)");
 909
 910
 911     if (id_p && *id_p)
 912         sscanf((const char *)id_p, "%255s", extctr->match_criteria);
 913
 914     if (rank_p && *rank_p)
 915         extctr->staticrank = atozint((const char *)rank_p);
 916
 917     if (type_p && *type_p)
 918     {
 919         enum zebra_recctrl_action_t action = action_update;
 920         if (!strcmp(type_p, "insert"))
 921             action = action_insert;
 922         else if (!strcmp(type_p, "delete"))
 923             action = action_delete;
 924         else if (!strcmp(type_p, "replace"))
 925             action = action_replace;
 926         else if (!strcmp(type_p, "update"))
 927             action = action_update;
 928         else
 929             dom_log(YLOG_WARN, tinfo, node, "bad @type value: %s", type_p);
 930         extctr->action = action;
 931     }
 932
 933     if (tinfo->record_info_invoked == 1)
 934     {
 935         /* warn about multiple only once */
 936         dom_log(YLOG_WARN, tinfo, node, "multiple record elements");
 937     }
 938     tinfo->record_info_invoked++;
 939
 940 }
 941
 942
 943 /* DOM filter style indexing */
 944 static void process_xml_element_zebra_node(struct filter_info *tinfo,
 945                                            struct recExtractCtrl *extctr,
 946                                            RecWord* recword,
 947                                            xmlNodePtr node)
 948 {
 949     if (node->type == XML_ELEMENT_NODE && node->ns && node->ns->href
 950         && 0 == XML_STRCMP(node->ns->href, zebra_dom_ns))
 951     {
 952         if (0 == XML_STRCMP(node->name, "index"))
 953         {
 954             const char *index_p = 0;
 955
 956             struct _xmlAttr *attr;
 957             for (attr = node->properties; attr; attr = attr->next)
 958             {
 959                 if (attr_content(attr, "name", &index_p))
 960                 {
 961                     index_value_of(tinfo, extctr, recword, node, index_p);
 962                 }
 963                 else
 964                 {
 965                     dom_log(YLOG_WARN, tinfo, node,
 966                             "bad attribute @%s, expected @name",
 967                             attr->name);
 968                 }
 969             }
 970         }
 971         else if (0 == XML_STRCMP(node->name, "record"))
 972         {
 973             const char *id_p = 0;
 974             const char *rank_p = 0;
 975             const char *type_p = 0;
 976
 977             struct _xmlAttr *attr;
 978             for (attr = node->properties; attr; attr = attr->next)
 979             {
 980                 if (attr_content(attr, "id", &id_p))
 981                     ;
 982                 else if (attr_content(attr, "rank", &rank_p))
 983                     ;
 984                 else if (attr_content(attr, "type", &type_p))
 985                     ;
 986                 else
 987                 {
 988                     dom_log(YLOG_WARN, tinfo, node,
 989                             "bad attribute @%s, expected @id|@rank|@type",
 990                             attr->name);
 991                 }
 992             }
 993             set_record_info(tinfo, extctr, node, id_p, rank_p, type_p);
 994         }
 995         else
 996         {
 997             dom_log(YLOG_WARN, tinfo, node,
 998                     "bad element <%s>,"
 999                     " expected <record>|<index> in namespace '%s'",
1000                     node->name, zebra_dom_ns);
1001         }
1002     }
1003 }
1004
1005 static int attr_content_pi(const char **c_ptr, const char *name,
1006                            char *value, size_t value_max)
1007 {
1008     size_t name_len = strlen(name);
1009     const char *look = *c_ptr;
1010     int ret = 0;
1011
1012     *value = '\0';
1013     while (*look && ' ' == *look)
1014         look++;
1015     if (strlen(look) > name_len)
1016     {
1017         if (look[name_len] == '=' && !memcmp(look, name, name_len))
1018         {
1019             size_t i = 0;
1020             look += name_len+1;
1021             while (*look && ' ' != *look)
1022             {
1023                 if (i < value_max-1)
1024                     value[i++] = *look;
1025                 look++;
1026             }
1027             value[i] = '\0';
1028             ret = 1;
1029         }
1030     }
1031     while (*look && ' ' == *look)
1032         look++;
1033     *c_ptr = look;
1034     return ret;
1035 }
1036
1037 /* DOM filter style indexing */
1038 static void process_xml_pi_node(struct filter_info *tinfo,
1039                                 struct recExtractCtrl *extctr,
1040                                 xmlNodePtr node,
1041                                 const char **index_pp)
1042 {
1043     /* if right PI name, continue parsing PI */
1044     if (0 == strcmp(zebra_pi_name, (const char *)node->name))
1045     {
1046         xmlChar *pi_p =  node->content;
1047         const char *look = (const char *) node->content;
1048
1049         /* parsing PI record instructions */
1050         if (0 == strncmp((const char *)look, "record", 6))
1051         {
1052             char id[256];
1053             char rank[256];
1054             char type[256];
1055
1056             *id = '\0';
1057             *rank = '\0';
1058             *type = '\0';
1059             look += 6;
1060             while (*look)
1061                 if (attr_content_pi(&look, "id", id, sizeof(id)))
1062                     ;
1063                 else if (attr_content_pi(&look, "rank", rank, sizeof(rank)))
1064                     ;
1065                 else if (attr_content_pi(&look, "type", type, sizeof(type)))
1066                 {
1067                     dom_log(YLOG_WARN, tinfo, node,
1068                             "content '%s', can not parse '%s'",
1069                             pi_p, look);
1070                     break;
1071                 }
1072             set_record_info(tinfo, extctr, node, id, rank, type);
1073         }
1074         /* parsing index instruction */
1075         else if (0 == strncmp((const char *)look, "index", 5))
1076         {
1077             look += 5;
1078
1079             /* eat whitespace */
1080             while (*look && ' ' == *look)
1081                 look++;
1082
1083             /* export index instructions to outside */
1084             *index_pp = look;
1085         }
1086         else
1087         {
1088             dom_log(YLOG_WARN, tinfo, node,
1089                     "content '%s', can not parse '%s'",
1090                     pi_p, look);
1091         }
1092     }
1093 }
1094
1095 /* DOM filter style indexing */
1096 static void process_xml_element_node(struct filter_info *tinfo,
1097                                      struct recExtractCtrl *extctr,
1098                                      RecWord* recword,
1099                                      xmlNodePtr node)
1100 {
1101     /* remember indexing instruction from PI to next element node */
1102     const char *index_p = 0;
1103
1104     /* check if we are an element node in the special zebra namespace
1105        and either set record data or index value-of node content*/
1106     process_xml_element_zebra_node(tinfo, extctr, recword, node);
1107
1108     /* loop through kid nodes */
1109     for (node = node->children; node; node = node->next)
1110     {
1111         /* check and set PI record and index index instructions */
1112         if (node->type == XML_PI_NODE)
1113         {
1114             process_xml_pi_node(tinfo, extctr, node, &index_p);
1115         }
1116         else if (node->type == XML_ELEMENT_NODE)
1117         {
1118             /* if there was a PI index instruction before this element */
1119             if (index_p)
1120             {
1121                 index_value_of(tinfo, extctr, recword, node, index_p);
1122                 index_p = 0;
1123             }
1124             process_xml_element_node(tinfo, extctr, recword,node);
1125         }
1126         else
1127             continue;
1128     }
1129 }
1130
1131
1132 /* DOM filter style indexing */
1133 static void extract_dom_doc_node(struct filter_info *tinfo,
1134                                  struct recExtractCtrl *extctr,
1135                                  xmlDocPtr doc)
1136 {
1137     /* only need to do the initialization once, reuse recword for all terms */
1138     RecWord recword;
1139     (*extctr->init)(extctr, &recword);
1140
1141     process_xml_element_node(tinfo, extctr, &recword, (xmlNodePtr)doc);
1142 }
1143
1144
1145 static int convert_extract_doc(struct filter_info *tinfo,
1146                                struct filter_input *input,
1147                                struct recExtractCtrl *p,
1148                                xmlDocPtr doc)
1149 {
1150     xmlChar *buf_out;
1151     int len_out;
1152     const char *params[10];
1153     xsltStylesheetPtr last_xsp = 0;
1154     xmlDocPtr store_doc = 0;
1155
1156     /* per default do not ingest record */
1157     tinfo->record_info_invoked = 0;
1158
1159     /* exit if empty document given */
1160     if (!doc)
1161         return RECCTRL_EXTRACT_SKIP;
1162
1163     /* we actuallu have a document which needs to be processed further */
1164     params[0] = 0;
1165     set_param_str(params, "schema", zebra_dom_ns, tinfo->nmem_record);
1166
1167     if (p && p->flagShowRecords)
1168     {
1169         xmlChar *buf_out;
1170         int len_out;
1171 #if 0
1172         FILE *outf = fopen("extract.xml", "w");
1173         xmlDocDumpMemory(doc, &buf_out, &len_out);
1174         fwrite(buf_out, 1, len_out, outf);
1175 #endif
1176         yaz_log(YLOG_LOG, "Extract Doc: %.*s", len_out, buf_out);
1177 #if 0
1178         fclose(outf);
1179 #endif
1180     }
1181
1182     /* input conversion */
1183     perform_convert(tinfo, p, 0, input->convert, params, &doc, 0);
1184
1185     if (tinfo->store)
1186     {
1187         /* store conversion */
1188         store_doc = xmlCopyDoc(doc, 1);
1189         perform_convert(tinfo, p, 0, tinfo->store->convert,
1190                         params, &store_doc, &last_xsp);
1191     }
1192
1193     /* saving either store doc or original doc in case no store doc exists */
1194     if (last_xsp)
1195         xsltSaveResultToString(&buf_out, &len_out,
1196                                store_doc ? store_doc : doc, last_xsp);
1197     else
1198         xmlDocDumpMemory(store_doc ? store_doc : doc, &buf_out, &len_out);
1199
1200     if (p->setStoreData)
1201         (*p->setStoreData)(p, buf_out, len_out);
1202     xmlFree(buf_out);
1203
1204     if (store_doc)
1205         xmlFreeDoc(store_doc);
1206
1207     /* extract conversion */
1208     perform_convert(tinfo, p, 0, tinfo->extract->convert, params, &doc, 0);
1209
1210
1211     /* finally, do the indexing */
1212     if (doc){
1213         extract_dom_doc_node(tinfo, p, doc);
1214         xmlFreeDoc(doc);
1215     }
1216
1217     /* there was nothing to index, so there is no inserted/updated record */
1218     if (tinfo->record_info_invoked == 0)
1219         return RECCTRL_EXTRACT_SKIP;
1220
1221     return RECCTRL_EXTRACT_OK;
1222 }
1223
1224 static int extract_xml_split(struct filter_info *tinfo,
1225                              struct filter_input *input,
1226                              struct recExtractCtrl *p)
1227 {
1228     int ret;
1229
1230     if (p->first_record)
1231     {
1232         if (input->u.xmlreader.reader)
1233             xmlFreeTextReader(input->u.xmlreader.reader);
1234         input->u.xmlreader.reader = xmlReaderForIO(ioread_ex, ioclose_ex,
1235                                                    p /* I/O handler */,
1236                                                    0 /* URL */,
1237                                                    0 /* encoding */,
1238                                                    XML_PARSE_XINCLUDE
1239                                                    | XML_PARSE_NOENT
1240                                                    | XML_PARSE_NONET);
1241     }
1242     if (!input->u.xmlreader.reader)
1243         return RECCTRL_EXTRACT_ERROR_GENERIC;
1244
1245     ret = xmlTextReaderRead(input->u.xmlreader.reader);
1246     while (ret == 1)
1247     {
1248         int type = xmlTextReaderNodeType(input->u.xmlreader.reader);
1249         int depth = xmlTextReaderDepth(input->u.xmlreader.reader);
1250
1251         if (type == XML_READER_TYPE_ELEMENT &&
1252             input->u.xmlreader.split_level == depth)
1253         {
1254             xmlNodePtr ptr;
1255
1256             /* per default do not ingest record */
1257             tinfo->record_info_invoked = 0;
1258
1259             ptr = xmlTextReaderExpand(input->u.xmlreader.reader);
1260             if (ptr)
1261                 {
1262                 /* we have a new document */
1263
1264                 xmlNodePtr ptr2 = xmlCopyNode(ptr, 1);
1265                 xmlDocPtr doc = xmlNewDoc((const xmlChar*) "1.0");
1266
1267                 xmlDocSetRootElement(doc, ptr2);
1268
1269                 /* writing debug info out */
1270                 if (p->flagShowRecords)
1271                 {
1272                     xmlChar *buf_out = 0;
1273                     int len_out = 0;
1274                     xmlDocDumpMemory(doc, &buf_out, &len_out);
1275                     yaz_log(YLOG_LOG, "%s: XMLREADER level: %i\n%.*s",
1276                             tinfo->fname ? tinfo->fname : "(none)",
1277                             depth, len_out, buf_out);
1278                     xmlFree(buf_out);
1279                 }
1280
1281                 return convert_extract_doc(tinfo, input, p, doc);
1282             }
1283             else
1284             {
1285                 xmlFreeTextReader(input->u.xmlreader.reader);
1286                 input->u.xmlreader.reader = 0;
1287                 return RECCTRL_EXTRACT_ERROR_GENERIC;
1288             }
1289         }
1290         ret = xmlTextReaderRead(input->u.xmlreader.reader);
1291     }
1292     xmlFreeTextReader(input->u.xmlreader.reader);
1293     input->u.xmlreader.reader = 0;
1294     return RECCTRL_EXTRACT_EOF;
1295 }
1296
1297 static int extract_xml_full(struct filter_info *tinfo,
1298                             struct filter_input *input,
1299                             struct recExtractCtrl *p)
1300 {
1301     if (p->first_record) /* only one record per stream */
1302     {
1303         xmlDocPtr doc = xmlReadIO(ioread_ex, ioclose_ex,
1304                                   p /* I/O handler */,
1305                                   0 /* URL */,
1306                                   0 /* encoding */,
1307                                   XML_PARSE_XINCLUDE
1308                                   | XML_PARSE_NOENT
1309                                   | XML_PARSE_NONET);
1310         if (!doc)
1311         {
1312             return RECCTRL_EXTRACT_ERROR_GENERIC;
1313         }
1314         return convert_extract_doc(tinfo, input, p, doc);
1315     }
1316     else
1317         return RECCTRL_EXTRACT_EOF;
1318 }
1319
1320 static int extract_iso2709(struct filter_info *tinfo,
1321                            struct filter_input *input,
1322                            struct recExtractCtrl *p)
1323 {
1324     char buf[100000];
1325     int record_length;
1326     int read_bytes, r;
1327
1328     if (p->stream->readf(p->stream, buf, 5) != 5)
1329         return RECCTRL_EXTRACT_EOF;
1330     while (*buf < '0' || *buf > '9')
1331     {
1332         int i;
1333
1334         dom_log(YLOG_WARN, tinfo, 0,
1335                 "MARC: Skipping bad byte %d (0x%02X)",
1336                 *buf & 0xff, *buf & 0xff);
1337         for (i = 0; i<4; i++)
1338             buf[i] = buf[i+1];
1339
1340         if (p->stream->readf(p->stream, buf+4, 1) != 1)
1341             return RECCTRL_EXTRACT_EOF;
1342     }
1343     record_length = atoi_n (buf, 5);
1344     if (record_length < 25)
1345     {
1346         dom_log(YLOG_WARN, tinfo, 0,
1347                 "MARC record length < 25, is %d",  record_length);
1348         return RECCTRL_EXTRACT_ERROR_GENERIC;
1349     }
1350     read_bytes = p->stream->readf(p->stream, buf+5, record_length-5);
1351     if (read_bytes < record_length-5)
1352     {
1353         dom_log(YLOG_WARN, tinfo, 0,
1354                 "couldn't read whole MARC record");
1355         return RECCTRL_EXTRACT_ERROR_GENERIC;
1356     }
1357     r = yaz_marc_read_iso2709(input->u.marc.handle,  buf, record_length);
1358     if (r < record_length)
1359     {
1360         dom_log (YLOG_WARN, tinfo, 0,
1361                  "parsing of MARC record failed r=%d length=%d",
1362                  r, record_length);
1363         return RECCTRL_EXTRACT_ERROR_GENERIC;
1364     }
1365     else
1366     {
1367         xmlDocPtr rdoc;
1368         xmlNode *root_ptr;
1369         yaz_marc_write_xml(input->u.marc.handle, &root_ptr,
1370                            "http://www.loc.gov/MARC21/slim", 0, 0);
1371         rdoc = xmlNewDoc((const xmlChar*) "1.0");
1372         xmlDocSetRootElement(rdoc, root_ptr);
1373         return convert_extract_doc(tinfo, input, p, rdoc);
1374     }
1375     return RECCTRL_EXTRACT_OK;
1376 }
1377
1378 static int filter_extract(void *clientData, struct recExtractCtrl *p)
1379 {
1380     struct filter_info *tinfo = clientData;
1381     struct filter_input *input = tinfo->input_list;
1382
1383     if (!input)
1384         return RECCTRL_EXTRACT_ERROR_GENERIC;
1385
1386     nmem_reset(tinfo->nmem_record);
1387
1388     if (p->setStoreData == 0)
1389         return extract_xml_full(tinfo, input, p);
1390     switch(input->type)
1391     {
1392     case DOM_INPUT_XMLREADER:
1393         if (input->u.xmlreader.split_level == 0)
1394             return extract_xml_full(tinfo, input, p);
1395         else
1396             return extract_xml_split(tinfo, input, p);
1397         break;
1398     case DOM_INPUT_MARC:
1399         return extract_iso2709(tinfo, input, p);
1400     }
1401     return RECCTRL_EXTRACT_ERROR_GENERIC;
1402 }
1403
1404 static int ioread_ret(void *context, char *buffer, int len)
1405 {
1406     struct recRetrieveCtrl *p = context;
1407     return p->stream->readf(p->stream, buffer, len);
1408 }
1409
1410 static int ioclose_ret(void *context)
1411 {
1412     return 0;
1413 }
1414
1415 static int filter_retrieve(void *clientData, struct recRetrieveCtrl *p)
1416 {
1417     /* const char *esn = zebra_dom_ns; */
1418     const char *esn = 0;
1419     const char *params[32];
1420     struct filter_info *tinfo = clientData;
1421     xmlDocPtr doc;
1422     struct filter_retrieve *retrieve;
1423     xsltStylesheetPtr last_xsp = 0;
1424
1425     if (p->comp)
1426     {
1427         if (p->comp->which == Z_RecordComp_simple
1428             && p->comp->u.simple->which == Z_ElementSetNames_generic)
1429         {
1430             esn = p->comp->u.simple->u.generic;
1431         }
1432         else if (p->comp->which == Z_RecordComp_complex
1433                  && p->comp->u.complex->generic->elementSpec
1434                  && p->comp->u.complex->generic->elementSpec->which ==
1435                  Z_ElementSpec_elementSetName)
1436         {
1437             esn = p->comp->u.complex->generic->elementSpec->u.elementSetName;
1438         }
1439     }
1440     retrieve = lookup_retrieve(tinfo, esn);
1441     if (!retrieve)
1442     {
1443         p->diagnostic =
1444             YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
1445         p->addinfo = odr_strdup(p->odr, esn);
1446         return 0;
1447     }
1448
1449     params[0] = 0;
1450     set_param_int(params, "id", p->localno, p->odr->mem);
1451     if (p->fname)
1452         set_param_str(params, "filename", p->fname, p->odr->mem);
1453     if (p->staticrank >= 0)
1454         set_param_int(params, "rank", p->staticrank, p->odr->mem);
1455
1456     if (esn)
1457         set_param_str(params, "schema", esn, p->odr->mem);
1458     else
1459         if (retrieve->name)
1460             set_param_str(params, "schema", retrieve->name, p->odr->mem);
1461         else if (retrieve->identifier)
1462             set_param_str(params, "schema", retrieve->identifier, p->odr->mem);
1463         else
1464             set_param_str(params, "schema", "", p->odr->mem);
1465
1466     if (p->score >= 0)
1467         set_param_int(params, "score", p->score, p->odr->mem);
1468     set_param_int(params, "size", p->recordSize, p->odr->mem);
1469
1470     doc = xmlReadIO(ioread_ret, ioclose_ret, p /* I/O handler */,
1471                     0 /* URL */,
1472                     0 /* encoding */,
1473                     XML_PARSE_XINCLUDE | XML_PARSE_NOENT | XML_PARSE_NONET);
1474     if (!doc)
1475     {
1476         p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
1477         return 0;
1478     }
1479
1480     /* retrieve conversion */
1481     perform_convert(tinfo, 0, p, retrieve->convert, params, &doc, &last_xsp);
1482     if (!doc)
1483     {
1484         p->diagnostic = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
1485     }
1486     else if (!p->input_format
1487              || !oid_oidcmp(p->input_format, yaz_oid_recsyn_xml))
1488     {
1489         xmlChar *buf_out;
1490         int len_out;
1491
1492         if (last_xsp)
1493             xsltSaveResultToString(&buf_out, &len_out, doc, last_xsp);
1494         else
1495             xmlDocDumpMemory(doc, &buf_out, &len_out);
1496
1497         p->output_format = yaz_oid_recsyn_xml;
1498         p->rec_len = len_out;
1499         p->rec_buf = odr_malloc(p->odr, p->rec_len);
1500         memcpy(p->rec_buf, buf_out, p->rec_len);
1501         xmlFree(buf_out);
1502     }
1503     else if (!oid_oidcmp(p->output_format, yaz_oid_recsyn_sutrs))
1504     {
1505         xmlChar *buf_out;
1506         int len_out;
1507
1508         if (last_xsp)
1509             xsltSaveResultToString(&buf_out, &len_out, doc, last_xsp);
1510         else
1511             xmlDocDumpMemory(doc, &buf_out, &len_out);
1512
1513         p->output_format = yaz_oid_recsyn_sutrs;
1514         p->rec_len = len_out;
1515         p->rec_buf = odr_malloc(p->odr, p->rec_len);
1516         memcpy(p->rec_buf, buf_out, p->rec_len);
1517
1518         xmlFree(buf_out);
1519     }
1520     else
1521     {
1522         p->diagnostic = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
1523     }
1524     xmlFreeDoc(doc);
1525     return 0;
1526 }
1527
1528 static struct recType filter_type = {
1529     0,
1530     "dom",
1531     filter_init,
1532     filter_config,
1533     filter_destroy,
1534     filter_extract,
1535     filter_retrieve
1536 };
1537
1538 RecType
1539 #ifdef IDZEBRA_STATIC_DOM
1540 idzebra_filter_dom
1541 #else
1542 idzebra_filter
1543 #endif
1544
1545 [] = {
1546     &filter_type,
1547     0,
1548 };
1549 /*
1550  * Local variables:
1551  * c-basic-offset: 4
1552  * indent-tabs-mode: nil
1553  * End:
1554  * vim: shiftwidth=4 tabstop=8 expandtab
1555  */
1556