5 # Routines for handling Z39.50 lookups
7 # Koha library project www.koha.org
9 # Licensed under the GPL
12 # Copyright 2000-2002 Katipo Communications
14 # This file is part of Koha.
16 # Koha is free software; you can redistribute it and/or modify it under the
17 # terms of the GNU General Public License as published by the Free Software
18 # Foundation; either version 2 of the License, or (at your option) any later
21 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
22 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
23 # A PARTICULAR PURPOSE. See the GNU General Public License for more details.
25 # You should have received a copy of the GNU General Public License along with
26 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
27 # Suite 330, Boston, MA 02111-1307 USA
31 # standard or CPAN modules used
43 use vars qw($VERSION @ISA @EXPORT);
45 # set the version for version checking
50 C4::Z3950 - Functions dealing with Z39.50 queries
58 This module contains functions for looking up Z39.50 servers, and for
59 entering Z39.50 lookup requests.
74 #------------------------------------------------
77 @servers= &getz3950servers(checked);
79 Returns the list of declared z3950 servers
81 C<$checked> should always be true (1) => returns only active servers.
82 If 0 => returns all servers
87 my $dbh = C4::Context->dbh;
90 $sth = $dbh->prepare("select * from z3950servers where checked=1");
92 $sth = $dbh->prepare("select * from z3950servers");
95 while ( my ($host, $port, $db, $userid, $password,$servername) = $sth->fetchrow ) {
96 push @result, "$servername/$host\:$port/$db/$userid/$password";
101 =item z3950servername
103 $name = &z3950servername($dbh, $server_id, $default_name);
105 Looks up a Z39.50 server by ID number, and returns its full name. If
106 the server is not found, returns C<$default_name>.
108 C<$server_id> is the Z39.50 server ID to look up.
115 sub z3950servername {
117 my ($srvid, # server id number
123 my $dbh = C4::Context->dbh;
125 my $sti=$dbh->prepare("select name from z3950servers where id=?");
127 $sti->execute($srvid);
129 ($longname)=$sti->fetchrow;
132 $longname="$default";
135 } # sub z3950servername
137 #---------------------------------------
141 $errmsg = &addz3950queue($query, $type, $request_id, @servers);
143 Adds a Z39.50 search query for the Z39.50 server to look up.
145 C<$query> is the term to search for.
147 C<$type> is the query type, e.g. C<isbn>, C<lccn>, etc.
149 C<$request_id> is a unique string that will identify this query.
151 C<@servers> is a list of servers to query (obviously, this can be
152 given either as an array, or as a list of scalars). Each element may
153 be either a Z39.50 server ID from the z3950server table of the Koha
154 database, the string C<DEFAULT> or C<CHECKED>, or a complete server
155 specification containing a colon.
157 C<DEFAULT> and C<CHECKED> are synonymous, and refer to those servers
158 in the z3950servers table whose 'checked' field is set and non-NULL.
160 Once the query has been submitted to the Z39.50 daemon,
161 C<&addz3950queue> sends a SIGHUP to the daemon to tell it to process
164 C<&addz3950queue> returns an error message. If it was successful, the
165 error message is the empty string.
173 $query, # value to look up
174 $type, # type of value ("isbn", "lccn", "title", "author", "keyword")
175 $requestid, # Unique value to prevent duplicate searches from multiple HTML form submits
176 @z3950list, # list of z3950 servers to query
189 # FIXME - Should be configurable, probably in /etc/koha.conf.
190 my $pidfile='/var/log/koha/processz3950queue.pid';
194 my $dbh = C4::Context->dbh;
195 # list of servers: entry can be a fully qualified URL-type entry
196 # or simply just a server ID number.
197 foreach $server (@z3950list) {
198 if ($server =~ /:/ ) {
199 push @serverlist, $server;
200 } elsif ($server eq 'DEFAULT' || $server eq 'CHECKED' ) {
201 $sth=$dbh->prepare("select host,port,db,userid,password ,name from z3950servers where checked <> 0 ");
203 while ( my ($host, $port, $db, $userid, $password,$servername) = $sth->fetchrow ) {
204 push @serverlist, "$servername/$host\:$port/$db/$userid/$password";
207 $sth=$dbh->prepare("select host,port,db,userid,password from z3950servers where id=? ");
208 $sth->execute($server);
209 my ($host, $port, $db, $userid, $password) = $sth->fetchrow;
210 push @serverlist, "$server/$host\:$port/$db/$userid/$password";
216 $serverlist = join(" ", @serverlist);
219 # FIXME - Is this test supposed to test whether @serverlist is
220 # empty? If so, then a) there are better ways to do that in
221 # Perl (e.g., "if (@serverlist eq ())"), and b) it doesn't
222 # work anyway, since it checks whether $serverlist is composed
223 # of one or more spaces, which is never the case, not even
224 # when there are 0 or 1 elements in @serverlist.
225 if ( $serverlist !~ /^ +$/ ) {
226 # Don't allow reinsertion of the same request identifier.
227 $sth=$dbh->prepare("select identifier from z3950queue
228 where identifier=?");
229 $sth->execute($requestid);
231 $sth=$dbh->prepare("insert into z3950queue (term,type,servers, identifier) values (?, ?, ?, ?)");
232 $sth->execute($query, $type, $serverlist, $requestid);
234 # FIXME - Perl is good at opening files. No need to
235 # spawn a separate 'cat' process.
236 my $pid=`cat $pidfile`;
239 # Kill -HUP the Z39.50 daemon to tell it to process
241 my $processcount=kill 1, $pid;
242 if ($processcount==0) {
243 $error.="Z39.50 search daemon error: no process signalled. ";
246 # FIXME - Error-checking like this should go close
248 $error.="No Z39.50 search daemon running: no file $pidfile. ";
251 # FIXME - Error-checking like this should go close
253 $error.="Duplicate request ID $requestid. ";
256 # FIXME - Error-checking like this should go close to the
258 # return "No Z39.50 search servers specified. "
259 # if @serverlist eq ();
261 # server list is empty
262 $error.="No Z39.50 search servers specified. ";
263 } # if serverlist empty
267 } # sub addz3950queue
276 Koha Developement team <info@koha.org>
280 #--------------------------------------
282 # Revision 1.8 2003/04/29 08:09:45 tipaul
283 # z3950 support is coming...
284 # * adding a syntax column in z3950 table = this column will say wether the z3950 must be called with PerferedRecordsyntax => USMARC or PerferedRecordsyntax => UNIMARC. I tried some french UNIMARC z3950 servers, and some only send USMARC, some only UNIMARC, some can answer with both.
285 # Note this is a 1st draft. More to follow (today ? I hope).
287 # Revision 1.7 2003/02/19 01:01:06 wolfpac444
288 # Removed the unecessary $dbh argument from being passed.
289 # Resolved a few minor FIXMEs.
291 # Revision 1.6 2002/10/13 08:30:53 arensb
292 # Deleted unused variables.
293 # Removed trailing whitespace.
295 # Revision 1.5 2002/10/13 06:13:23 arensb
296 # Removed bogus #! line (this isn't a script!)
297 # Removed unused global variables.
299 # Added some explanatory comments.
300 # Added some FIXME comments.
302 # Revision 1.4 2002/10/11 12:35:35 arensb
303 # Replaced &requireDBI with C4::Context->dbh
305 # Revision 1.3 2002/08/14 18:12:52 tonnesen
306 # Added copyright statement to all .pl and .pm files
308 # Revision 1.2 2002/07/02 20:31:33 tonnesen
309 # module added from rel-1-2 branch
311 # Revision 1.1.2.5 2002/06/29 17:33:47 amillar
312 # Allow DEFAULT as input to addz3950search.
313 # Check for existence of pid file (cat crashed otherwise).
314 # Return error messages in addz3950search.
316 # Revision 1.1.2.4 2002/06/28 18:07:27 tonnesen
317 # marcimport.pl will print an error message if it can not signal the
318 # processz3950queue program. The message contains instructions for starting the
321 # Revision 1.1.2.3 2002/06/28 17:45:39 tonnesen
322 # z3950queue now listens for a -HUP signal before processing the queue. Z3950.pm
323 # sends the -HUP signal when queries are added to the queue.
325 # Revision 1.1.2.2 2002/06/26 20:54:31 tonnesen
326 # use warnings breaks on perl 5.005...
328 # Revision 1.1.2.1 2002/06/26 07:26:41 amillar
329 # New module for Z39.50 searching