1 /* This file is part of the YAZ toolkit.
2 * Copyright (C) 1995-2013 Index Data
3 * See the file LICENSE for details.
7 * \brief Implements Solr decoding/encoding
16 #include <yaz/matchstr.h>
17 #include <yaz/yaz-iconv.h>
19 #include <yaz/facet.h>
20 #include <yaz/wrbuf.h>
24 #define SOLR_MAX_PARAMETERS 100
27 #include <libxml/parser.h>
28 #include <libxml/tree.h>
30 static void extract_text_node(xmlNodePtr node, WRBUF wrbuf) {
32 for (child = node->children; child ; child = child->next)
34 if (child->type == XML_TEXT_NODE)
35 wrbuf_puts(wrbuf, (const char *) child->content);
39 static int match_xml_node_attribute(
41 const char *node_name, const char *attribute_name, const char *value)
43 const char *attribute_value;
44 // check if the node name matches
45 if (strcmp((const char*) ptr->name, node_name))
49 attribute_value = yaz_element_attribute_value_get(ptr, node_name,
51 if (attribute_value && !strcmp(attribute_value, value))
54 else /* No attribute to check */
59 static void yaz_solr_decode_result_docs(ODR o, xmlNodePtr ptr,
61 Z_SRW_searchRetrieveResponse *sr)
68 for (node = ptr->children; node; node = node->next)
69 if (node->type == XML_ELEMENT_NODE)
73 sr->records = odr_malloc(o, sizeof(*sr->records) * sr->num_records);
75 for (node = ptr->children; node; node = node->next)
77 if (node->type == XML_ELEMENT_NODE)
79 Z_SRW_record *record = sr->records + i;
80 xmlBufferPtr buf = xmlBufferCreate();
81 xmlNode *tmp = xmlCopyNode(node, 1);
83 xmlNodeDump(buf, tmp->doc, tmp, 0, 0);
87 record->recordSchema = 0;
88 record->recordPacking = Z_SRW_recordPacking_XML;
89 record->recordData_len = buf->use;
90 record->recordData_buf = odr_malloc(o, buf->use + 1);
91 memcpy(record->recordData_buf, buf->content, buf->use);
92 record->recordData_buf[buf->use] = '\0';
93 record->recordPosition = odr_intdup(o, start + offset + 1);
103 static int yaz_solr_decode_result(ODR o, xmlNodePtr ptr,
104 Z_SRW_searchRetrieveResponse *sr)
107 struct _xmlAttr *attr;
108 for (attr = ptr->properties; attr; attr = attr->next)
109 if (attr->children && attr->children->type == XML_TEXT_NODE)
111 if (!strcmp((const char *) attr->name, "numFound"))
113 sr->numberOfRecords = odr_intdup(o, odr_atoi(
114 (const char *) attr->children->content));
116 else if (!strcmp((const char *) attr->name, "start"))
118 start = odr_atoi((const char *) attr->children->content);
121 if (sr->numberOfRecords && *sr->numberOfRecords > 0)
122 yaz_solr_decode_result_docs(o, ptr, start, sr);
123 if (sr->numberOfRecords)
128 static const char *get_facet_term_count(xmlNodePtr node, Odr_int *freq)
130 const char *term = yaz_element_attribute_value_get(node, "int", "name");
132 WRBUF wrbuf = wrbuf_alloc();
136 for (child = node->children; child ; child = child->next)
138 if (child->type == XML_TEXT_NODE)
139 wrbuf_puts(wrbuf, (const char *) child->content);
141 *freq = odr_atoi(wrbuf_cstr(wrbuf));
142 wrbuf_destroy(wrbuf);
146 Z_FacetField *yaz_solr_decode_facet_field(ODR o, xmlNodePtr ptr,
147 Z_SRW_searchRetrieveResponse *sr)
150 Z_AttributeList *list;
151 Z_FacetField *facet_field;
156 const char* name = yaz_element_attribute_value_get(ptr, "lst", "name");
157 list = yaz_use_attribute_create(o, name);
158 for (node = ptr->children; node; node = node->next)
160 facet_field = facet_field_create(o, list, num_terms);
162 for (node = ptr->children; node; node = node->next)
165 const char *term = get_facet_term_count(node, &count);
166 facet_field_term_set(o, facet_field,
167 facet_term_create_cstr(o, term, count), index);
173 static int yaz_solr_decode_facet_counts(ODR o, xmlNodePtr root,
174 Z_SRW_searchRetrieveResponse *sr)
177 for (ptr = root->children; ptr; ptr = ptr->next)
179 if (match_xml_node_attribute(ptr, "lst", "name", "facet_fields"))
182 Z_FacetList *facet_list;
184 for (node = ptr->children; node; node= node->next)
188 facet_list = facet_list_create(o, num_facets);
190 for (node = ptr->children; node; node= node->next)
192 facet_list_field_set(o, facet_list,
193 yaz_solr_decode_facet_field(o, node, sr),
197 sr->facetList = facet_list;
204 static void yaz_solr_decode_suggestion_values(xmlNodePtr listPptr, WRBUF wrbuf)
207 for (node = listPptr; node; node= node->next) {
208 if (!strcmp((char*) node->name, "lst")) {
210 for (child = node->children; child; child= child->next) {
211 if (match_xml_node_attribute(child, "str", "name", "word")) {
212 wrbuf_puts(wrbuf, "<suggestion>");
213 extract_text_node(child, wrbuf);
214 wrbuf_puts(wrbuf, "</suggestion>\n");
221 static void yaz_solr_decode_suggestion_lst(xmlNodePtr lstPtr, WRBUF wrbuf)
224 for (node = lstPtr; node; node= node->next) {
225 if (match_xml_node_attribute(node, "arr", "name", "suggestion")) {
226 yaz_solr_decode_suggestion_values(node->children, wrbuf);
231 static void yaz_solr_decode_misspelled(xmlNodePtr lstPtr, WRBUF wrbuf)
234 for (node = lstPtr; node; node= node->next)
236 if (!strcmp((const char*) node->name, "lst")) {
237 const char *misspelled = yaz_element_attribute_value_get(node, "lst", "name");
239 wrbuf_printf(wrbuf, "<misspelled term=\"%s\">\n", misspelled);
240 yaz_solr_decode_suggestion_lst(node->children, wrbuf);
241 wrbuf_puts(wrbuf, "</misspelled>\n");
247 static int yaz_solr_decode_spellcheck(ODR o, xmlNodePtr spellcheckPtr, Z_SRW_searchRetrieveResponse *sr)
250 WRBUF wrbuf = wrbuf_alloc();
251 wrbuf_puts(wrbuf, "");
252 for (ptr = spellcheckPtr->children; ptr; ptr = ptr->next)
254 if (match_xml_node_attribute(ptr, "lst", "name", "suggestions"))
256 yaz_solr_decode_misspelled(ptr->children, wrbuf);
259 sr->suggestions = odr_strdup(o, wrbuf_cstr(wrbuf));
263 static int yaz_solr_decode_scan_result(ODR o, xmlNodePtr ptr,
264 Z_SRW_scanResponse *scr)
270 /* find the actual list */
271 for (node = ptr->children; node; node = node->next)
272 if (node->type == XML_ELEMENT_NODE) {
278 for (node = ptr->children; node; node = node->next)
279 if (node->type == XML_ELEMENT_NODE && !strcmp((const char *) node->name, "int"))
283 scr->terms = odr_malloc(o, sizeof(*scr->terms) * scr->num_terms);
285 for (node = ptr->children; node; node = node->next)
287 if (node->type == XML_ELEMENT_NODE && !strcmp((const char *) node->name, "int"))
289 Z_SRW_scanTerm *term = scr->terms + i;
292 const char *val = get_facet_term_count(node, &count);
294 term->numberOfRecords = odr_intdup(o, count);
296 /* if val contains a ^ then it is probably term<^>display term so separate them. This is due to
297 * SOLR not being able to encode them into 2 separate attributes.
299 pos = strchr(val, '^');
301 term->displayTerm = odr_strdup(o, pos + 1);
303 term->value = odr_strdup(o, val);
306 term->value = odr_strdup(o, val);
307 term->displayTerm = NULL;
309 term->whereInList = NULL;
321 int yaz_solr_decode_response(ODR o, Z_HTTP_Response *hres, Z_SRW_PDU **pdup)
324 const char *content_buf = hres->content_buf;
325 int content_len = hres->content_len;
326 xmlDocPtr doc = xmlParseMemory(content_buf, content_len);
330 Z_SRW_searchRetrieveResponse *sr = NULL;
331 Z_SRW_scanResponse *scr = NULL;
339 xmlNodePtr root = xmlDocGetRootElement(doc);
344 else if (strcmp((const char *) root->name, "response"))
350 /** look for result (required) and facets node (optional) */
353 for (ptr = root->children; ptr; ptr = ptr->next)
355 if (ptr->type == XML_ELEMENT_NODE &&
356 !strcmp((const char *) ptr->name, "result")) {
357 pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
358 sr = pdu->u.response;
359 rc_result = yaz_solr_decode_result(o, ptr, sr);
361 if (ptr->type == XML_ELEMENT_NODE &&
362 match_xml_node_attribute(ptr, "lst", "name", "terms")) {
363 pdu = yaz_srw_get(o, Z_SRW_scan_response);
364 scr = pdu->u.scan_response;
365 rc_result = yaz_solr_decode_scan_result(o, ptr, scr);
367 /* TODO The check on hits is a work-around to avoid garbled facets on zero results from the SOLR server.
368 * The work-around works because the results is before the facets in the xml. */
370 if (rc_result == 0 && *sr->numberOfRecords > 0 &&
371 match_xml_node_attribute(ptr, "lst", "name", "facet_counts"))
372 rc_facets = yaz_solr_decode_facet_counts(o, ptr, sr);
373 if (rc_result == 0 && *sr->numberOfRecords == 0 &&
374 match_xml_node_attribute(ptr, "lst", "name", "spellcheck"))
375 rc_facets = yaz_solr_decode_spellcheck(o, ptr, sr);
379 ret = rc_result + rc_facets;
392 static int yaz_solr_encode_facet_field(
393 ODR encode, char **name, char **value, int *i,
394 Z_FacetField *facet_field)
396 Z_AttributeList *attribute_list = facet_field->attributes;
397 struct yaz_facet_attr attr_values;
398 yaz_facet_attr_init(&attr_values);
399 yaz_facet_attr_get_z_attributes(attribute_list, &attr_values);
401 if (attr_values.errcode)
403 if (attr_values.useattr)
405 WRBUF wrbuf = wrbuf_alloc();
406 yaz_add_name_value_str(encode, name, value, i,
408 odr_strdup(encode, attr_values.useattr));
410 if (attr_values.limit > 0)
412 Odr_int v = attr_values.limit;
414 wrbuf_printf(wrbuf, "f.%s.facet.limit", attr_values.useattr);
415 yaz_add_name_value_int(encode, name, value, i,
416 odr_strdup(encode, wrbuf_cstr(wrbuf)),
419 if (attr_values.start > 1)
421 Odr_int v = attr_values.start - 1;
423 wrbuf_printf(wrbuf, "f.%s.facet.offset", attr_values.useattr);
424 yaz_add_name_value_int(encode, name, value, i,
425 odr_strdup(encode, wrbuf_cstr(wrbuf)),
428 if (attr_values.sortorder == 1)
431 wrbuf_printf(wrbuf, "f.%s.facet.sort", attr_values.useattr);
432 yaz_add_name_value_str(encode, name, value, i,
433 odr_strdup(encode, wrbuf_cstr(wrbuf)),
436 wrbuf_destroy(wrbuf);
440 if (attr_values.limit > 0)
442 Odr_int v = attr_values.limit;
443 yaz_add_name_value_int(encode, name, value, i, "facet.limit", &v);
445 if (attr_values.start > 1)
447 Odr_int v = attr_values.start - 1;
448 yaz_add_name_value_int(encode, name, value, i, "facet.offset", &v);
450 if (attr_values.sortorder == 1)
452 yaz_add_name_value_str(encode, name, value, i, "facet.sort",
459 static int yaz_solr_encode_facet_list(
460 ODR encode, char **name, char **value,
461 int *i, Z_FacetList *facet_list)
464 for (index = 0; index < facet_list->num; index++)
466 int r = yaz_solr_encode_facet_field(encode, name, value, i,
467 facet_list->elements[index]);
475 int yaz_solr_encode_request(Z_HTTP_Request *hreq, Z_SRW_PDU *srw_pdu,
476 ODR encode, const char *charset)
478 const char *solr_op = 0;
479 //TODO Change. not a nice hard coded, unchecked limit.
480 char *name[SOLR_MAX_PARAMETERS], *value[SOLR_MAX_PARAMETERS];
488 z_HTTP_header_add_basic_auth(encode, &hreq->headers,
489 srw_pdu->username, srw_pdu->password);
490 if (srw_pdu->which == Z_SRW_searchRetrieve_request)
492 Z_SRW_searchRetrieveRequest *request = srw_pdu->u.request;
494 if (!srw_pdu->u.request->query)
496 /* not considering query type here ! */
497 yaz_add_name_value_str(encode, name, value, &i, "q", request->query);
498 if (srw_pdu->u.request->startRecord)
500 Odr_int start = *request->startRecord - 1;
501 yaz_add_name_value_int(encode, name, value, &i,
504 yaz_add_name_value_int(encode, name, value, &i,
505 "rows", request->maximumRecords);
506 yaz_add_name_value_str(encode, name, value, &i,
507 "fl", request->recordSchema);
509 switch(srw_pdu->u.request->sort_type)
511 case Z_SRW_sort_type_none:
513 case Z_SRW_sort_type_sort:
514 yaz_add_name_value_str(encode, name, value, &i, "sort",
515 srw_pdu->u.request->sort.sortKeys);
518 if (request->facetList)
520 Z_FacetList *facet_list = request->facetList;
521 yaz_add_name_value_str(encode, name, value, &i, "facet", "true");
522 yaz_add_name_value_str(encode, name, value, &i, "facet.mincount", "1");
523 if (yaz_solr_encode_facet_list(encode, name, value, &i, facet_list))
527 else if (srw_pdu->which == Z_SRW_scan_request) {
528 Z_SRW_scanRequest *request = srw_pdu->u.scan_request;
530 if (!srw_pdu->u.scan_request->scanClause)
532 if (!strcmp(srw_pdu->u.scan_request->queryType, "pqf"))
534 yaz_add_name_value_str(encode, name, value, &i,
535 "terms.fl", request->scanClause);
536 yaz_add_name_value_str(encode, name, value, &i,
537 "terms.lower", request->scanClause);
539 else if (!strcmp(srw_pdu->u.scan_request->queryType, "cql"))
541 q = request->scanClause;
542 pos = strchr(q, ':');
544 yaz_add_name_value_str(encode, name, value, &i,
545 "terms.lower", odr_strdup(encode, pos + 1));
547 yaz_add_name_value_str(encode, name, value, &i,
548 "terms.fl", odr_strdup(encode, q));
551 yaz_add_name_value_str(encode, name, value, &i,
552 "terms.lower", odr_strdup(encode, q));
557 yaz_add_name_value_str(encode, name, value, &i,
558 "terms.sort", "index");
559 yaz_add_name_value_int(encode, name, value, &i,
560 "terms.limit", request->maximumTerms);
565 if (srw_pdu->extra_args)
567 Z_SRW_extra_arg *ea = srw_pdu->extra_args;
568 for (; ea && i < SOLR_MAX_PARAMETERS; ea = ea->next)
571 value[i] = ea->value;
578 yaz_array_to_uri(&uri_args, encode, name, value);
580 hreq->method = "GET";
583 odr_malloc(encode, strlen(hreq->path) +
584 strlen(uri_args) + strlen(solr_op) + 4);
586 strcpy(path, hreq->path);
587 cp = strrchr(path, '/');
590 if (!strcmp(cp, "/select") || !strcmp(cp, "/"))
594 strcat(path, solr_op);
596 strcat(path, uri_args);
599 z_HTTP_header_add_content_type(encode, &hreq->headers,
600 "text/xml", charset);
608 * c-file-style: "Stroustrup"
609 * indent-tabs-mode: nil
611 * vim: shiftwidth=4 tabstop=8 expandtab