2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.27 1995-11-27 13:58:54 adam
8 * New option -t. storeStore data implemented in server.
10 * Revision 1.26 1995/11/25 10:24:07 adam
11 * More record fields - they are enumerated now.
12 * New options: flagStoreData flagStoreKey.
14 * Revision 1.25 1995/11/21 15:29:13 adam
15 * Config file 'base' read by default by both indexer and server.
17 * Revision 1.24 1995/11/20 16:59:47 adam
18 * New update method: the 'old' keys are saved for each records.
20 * Revision 1.23 1995/11/16 17:00:56 adam
21 * Better logging of rpn query.
23 * Revision 1.22 1995/11/16 15:34:55 adam
24 * Uses new record management system in both indexer and server.
26 * Revision 1.21 1995/11/01 16:25:52 quinn
27 * *** empty log message ***
29 * Revision 1.20 1995/10/27 14:00:12 adam
30 * Implemented detection of database availability.
32 * Revision 1.19 1995/10/17 18:02:11 adam
33 * New feature: databases. Implemented as prefix to words in dictionary.
35 * Revision 1.18 1995/10/16 14:03:09 quinn
36 * Changes to support element set names and espec1
38 * Revision 1.17 1995/10/16 09:32:40 adam
39 * More work on relational op.
41 * Revision 1.16 1995/10/13 12:26:44 adam
42 * Optimization of truncation.
44 * Revision 1.15 1995/10/12 12:40:55 adam
45 * Bug fixes in rpn_prox.
47 * Revision 1.14 1995/10/09 16:18:37 adam
48 * Function dict_lookup_grep got extra client data parameter.
50 * Revision 1.13 1995/10/06 14:38:00 adam
51 * New result set method: r_score.
52 * Local no (sysno) and score is transferred to retrieveCtrl.
54 * Revision 1.12 1995/10/06 13:52:06 adam
55 * Bug fixes. Handler may abort further scanning.
57 * Revision 1.11 1995/10/06 10:43:57 adam
58 * Scan added. 'occurrences' in scan entries not set yet.
60 * Revision 1.10 1995/10/02 16:43:32 quinn
61 * Set default resulting record type in fetch.
63 * Revision 1.9 1995/10/02 15:18:52 adam
64 * New member in recRetrieveCtrl: diagnostic.
66 * Revision 1.8 1995/09/28 09:19:47 adam
67 * xfree/xmalloc used everywhere.
68 * Extract/retrieve method seems to work for text records.
70 * Revision 1.7 1995/09/27 16:17:32 adam
71 * More work on retrieve.
73 * Revision 1.6 1995/09/08 08:53:22 adam
74 * Record buffer maintained in server_info.
76 * Revision 1.5 1995/09/06 16:11:18 adam
77 * Option: only one word key per file.
79 * Revision 1.4 1995/09/06 10:33:04 adam
80 * More work on present. Some log messages removed.
82 * Revision 1.3 1995/09/05 15:28:40 adam
83 * More work on search engine.
85 * Revision 1.2 1995/09/04 12:33:43 adam
86 * Various cleanup. YAZ util used instead.
88 * Revision 1.1 1995/09/04 09:10:41 adam
89 * More work on index add/del/update.
90 * Merge sort implemented.
91 * Initial work on z39 server.
105 ZServerInfo server_info;
107 bend_initresult *bend_init (bend_initrequest *q)
109 static bend_initresult r;
110 static char *name = "zserver";
116 logf (LOG_DEBUG, "bend_init");
118 if (!common_resource)
120 struct statserv_options_block *sob;
122 sob = statserv_getcontrol ();
123 logf (LOG_LOG, "Reading resources from %s", sob->configname);
124 if (!(common_resource = res_open (sob->configname)))
126 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
131 data1_tabpath = res_get(common_resource, "data1_tabpath");
132 server_info.sets = NULL;
134 server_info.records = rec_open (0);
135 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
137 logf (LOG_WARN, "dict_open fail: word dict");
139 r.errstring = "dict_open fail: word dict";
142 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
143 sizeof (struct it_key))))
145 logf (LOG_WARN, "is_open fail: word isam");
146 dict_close (server_info.wordDict);
148 r.errstring = "is_open fail: word isam";
151 server_info.odr = odr_createmem (ODR_ENCODE);
155 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
157 static bend_searchresult r;
164 odr_reset (server_info.odr);
165 server_info.errCode = 0;
166 server_info.errString = NULL;
168 logf (LOG_LOG, "ResultSet '%s'", q->setname);
169 switch (q->query->which)
172 r.errcode = rpn_search (&server_info, q->query->u.type_1,
173 q->num_bases, q->basenames, q->setname,
175 r.errstring = server_info.errString;
183 static int record_ext_read (int fd, char *buf, size_t count)
185 return read (fd, buf, count);
188 static int record_int_pos;
189 static char *record_int_buf;
190 static int record_int_len;
192 static int record_int_read (int fd, char *buf, size_t count)
194 int l = record_int_len - record_int_pos;
197 l = (l < count) ? l : count;
198 memcpy (buf, record_int_buf + record_int_pos, l);
203 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
204 oid_value input_format, Z_RecordComposition *comp,
205 oid_value *output_format, char **rec_bufp,
209 char *fname, *file_type;
211 struct recRetrieveCtrl retrieveCtrl;
213 rec = rec_get (zi->records, sysno);
214 file_type = rec->info[recInfo_fileType];
215 fname = rec->info[recInfo_filename];
217 if (!(rt = recType_byName (file_type)))
219 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
223 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
224 if (rec->size[recInfo_storeData] > 0)
226 retrieveCtrl.readf = record_int_read;
227 record_int_len = rec->size[recInfo_storeData];
228 record_int_buf = rec->info[recInfo_storeData];
233 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
235 char *msg = "Record doesn't exist";
236 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
237 *output_format = VAL_SUTRS;
239 *rec_lenp = strlen (msg);
241 return 0; /* or 14: System error in presenting records */
243 retrieveCtrl.readf = record_ext_read;
245 retrieveCtrl.localno = sysno;
246 retrieveCtrl.score = score;
247 retrieveCtrl.odr = stream;
248 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
249 retrieveCtrl.comp = comp;
250 retrieveCtrl.diagnostic = 0;
251 (*rt->retrieve)(&retrieveCtrl);
252 *output_format = retrieveCtrl.output_format;
253 *rec_bufp = retrieveCtrl.rec_buf;
254 *rec_lenp = retrieveCtrl.rec_len;
255 close (retrieveCtrl.fd);
258 return retrieveCtrl.diagnostic;
261 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
263 static bend_fetchresult r;
265 ZServerSetSysno *records;
271 odr_reset (server_info.odr);
272 server_info.errCode = 0;
274 positions[0] = q->number;
275 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
278 logf (LOG_DEBUG, "resultSetRecordGet, error");
282 if (!records[0].sysno)
285 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
288 r.errcode = record_fetch (&server_info, records[0].sysno,
289 records[0].score, q->stream, q->format,
290 q->comp, &r.format, &r.record, &r.len);
291 resultSetSysnoDel (&server_info, records, 1);
295 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
300 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
302 static bend_scanresult r;
305 odr_reset (server_info.odr);
306 server_info.errCode = 0;
307 server_info.errString = 0;
309 r.term_position = q->term_position;
310 r.num_entries = q->num_entries;
311 r.errcode = rpn_scan (&server_info, q->term,
312 q->num_bases, q->basenames,
314 &r.num_entries, &r.entries, &status);
315 r.errstring = server_info.errString;
320 void bend_close (void *handle)
322 dict_close (server_info.wordDict);
323 is_close (server_info.wordIsam);
324 rec_close (&server_info.records);
328 int main (int argc, char **argv)
330 struct statserv_options_block *sob;
332 sob = statserv_getcontrol ();
333 strcpy (sob->configname, "base");
334 statserv_setcontrol (sob);
336 return statserv_main (argc, argv);