380 lines
11 KiB
Perl
Executable file
380 lines
11 KiB
Perl
Executable file
package C4::Z3950;
|
|
|
|
# $Id$
|
|
|
|
# Routines for handling Z39.50 lookups
|
|
|
|
# Koha library project www.koha.org
|
|
|
|
# Licensed under the GPL
|
|
|
|
|
|
# Copyright 2000-2002 Katipo Communications
|
|
#
|
|
# This file is part of Koha.
|
|
#
|
|
# Koha is free software; you can redistribute it and/or modify it under the
|
|
# terms of the GNU General Public License as published by the Free Software
|
|
# Foundation; either version 2 of the License, or (at your option) any later
|
|
# version.
|
|
#
|
|
# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
|
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along with
|
|
# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
|
|
# Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
use strict;
|
|
|
|
# standard or CPAN modules used
|
|
use DBI;
|
|
|
|
# Koha modules used
|
|
use C4::Input;
|
|
use C4::Biblio;
|
|
|
|
#------------------
|
|
|
|
require Exporter;
|
|
|
|
use vars qw($VERSION @ISA @EXPORT);
|
|
|
|
# set the version for version checking
|
|
$VERSION = do { my @v = '$Revision$' =~ /\d+/g; shift(@v).".".join( "_", map { sprintf "%03d", $_ } @v ); };
|
|
|
|
=head1 NAME
|
|
|
|
C4::Z3950 - Functions dealing with Z39.50 queries
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
use C4::Z3950;
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
This module contains functions for looking up Z39.50 servers, and for
|
|
entering Z39.50 lookup requests.
|
|
|
|
=head1 FUNCTIONS
|
|
|
|
=over 2
|
|
|
|
=cut
|
|
|
|
@ISA = qw(Exporter);
|
|
@EXPORT = qw(
|
|
&getz3950servers
|
|
&z3950servername
|
|
&addz3950queue
|
|
&checkz3950searchdone
|
|
);
|
|
|
|
#------------------------------------------------
|
|
=item getz3950servers
|
|
|
|
@servers= &getz3950servers(checked);
|
|
|
|
Returns the list of declared z3950 servers
|
|
|
|
C<$checked> should always be true (1) => returns only active servers.
|
|
If 0 => returns all servers
|
|
|
|
=cut
|
|
sub getz3950servers {
|
|
my ($checked) = @_;
|
|
my $dbh = C4::Context->dbh;
|
|
my $sth;
|
|
if ($checked) {
|
|
$sth = $dbh->prepare("select * from z3950servers where checked=1");
|
|
} else {
|
|
$sth = $dbh->prepare("select * from z3950servers");
|
|
}
|
|
my @result;
|
|
while ( my ($host, $port, $db, $userid, $password,$servername) = $sth->fetchrow ) {
|
|
push @result, "$servername/$host\:$port/$db/$userid/$password";
|
|
} # while
|
|
return @result;
|
|
}
|
|
|
|
=item z3950servername
|
|
|
|
$name = &z3950servername($dbh, $server_id, $default_name);
|
|
|
|
Looks up a Z39.50 server by ID number, and returns its full name. If
|
|
the server is not found, returns C<$default_name>.
|
|
|
|
C<$server_id> is the Z39.50 server ID to look up.
|
|
|
|
C<$dbh> is ignored.
|
|
|
|
=cut
|
|
#'
|
|
|
|
sub z3950servername {
|
|
# inputs
|
|
my ($srvid, # server id number
|
|
$default,)=@_;
|
|
# return
|
|
my $longname;
|
|
#----
|
|
|
|
my $dbh = C4::Context->dbh;
|
|
|
|
my $sti=$dbh->prepare("select name from z3950servers where id=?");
|
|
|
|
$sti->execute($srvid);
|
|
if ( ! $sti->err ) {
|
|
($longname)=$sti->fetchrow;
|
|
}
|
|
if (! $longname) {
|
|
$longname="$default";
|
|
}
|
|
return $longname;
|
|
} # sub z3950servername
|
|
|
|
#---------------------------------------
|
|
|
|
=item addz3950queue
|
|
|
|
$errmsg = &addz3950queue($query, $type, $request_id, @servers);
|
|
|
|
Adds a Z39.50 search query for the Z39.50 server to look up.
|
|
|
|
C<$query> is the term to search for.
|
|
|
|
C<$type> is the query type, e.g. C<isbn>, C<lccn>, etc.
|
|
|
|
C<$request_id> is a unique string that will identify this query.
|
|
|
|
C<@servers> is a list of servers to query (obviously, this can be
|
|
given either as an array, or as a list of scalars). Each element may
|
|
be either a Z39.50 server ID from the z3950server table of the Koha
|
|
database, the string C<DEFAULT> or C<CHECKED>, or a complete server
|
|
specification containing a colon.
|
|
|
|
C<DEFAULT> and C<CHECKED> are synonymous, and refer to those servers
|
|
in the z3950servers table whose 'checked' field is set and non-NULL.
|
|
|
|
Once the query has been submitted to the Z39.50 daemon,
|
|
C<&addz3950queue> sends a SIGHUP to the daemon to tell it to process
|
|
this new request.
|
|
|
|
C<&addz3950queue> returns an error message. If it was successful, the
|
|
error message is the empty string.
|
|
|
|
=cut
|
|
#'
|
|
sub addz3950queue {
|
|
use strict;
|
|
# input
|
|
my (
|
|
$query, # value to look up
|
|
$type, # type of value ("isbn", "lccn", "title", "author", "keyword")
|
|
$requestid, # Unique value to prevent duplicate searches from multiple HTML form submits
|
|
@z3950list, # list of z3950 servers to query
|
|
)=@_;
|
|
# Returns:
|
|
my $error;
|
|
|
|
my (
|
|
$sth,
|
|
@serverlist,
|
|
$server,
|
|
$failed,
|
|
$servername,
|
|
);
|
|
|
|
# FIXME - Should be configurable, probably in /etc/koha.conf.
|
|
my $pidfile='/var/log/koha/processz3950queue.pid';
|
|
|
|
$error="";
|
|
|
|
my $dbh = C4::Context->dbh;
|
|
# list of servers: entry can be a fully qualified URL-type entry
|
|
# or simply just a server ID number.
|
|
foreach $server (@z3950list) {
|
|
if ($server =~ /:/ ) {
|
|
push @serverlist, $server;
|
|
} elsif ($server eq 'DEFAULT' || $server eq 'CHECKED' ) {
|
|
$sth=$dbh->prepare("select host,port,db,userid,password ,name,syntax from z3950servers where checked <> 0 ");
|
|
$sth->execute;
|
|
while ( my ($host, $port, $db, $userid, $password,$servername,$syntax) = $sth->fetchrow ) {
|
|
push @serverlist, "$servername/$host\:$port/$db/$userid/$password/$syntax";
|
|
} # while
|
|
} else {
|
|
$sth=$dbh->prepare("select host,port,db,userid,password,syntax from z3950servers where id=? ");
|
|
$sth->execute($server);
|
|
my ($host, $port, $db, $userid, $password,$syntax) = $sth->fetchrow;
|
|
push @serverlist, "$server/$host\:$port/$db/$userid/$password/$syntax";
|
|
}
|
|
}
|
|
|
|
my $serverlist='';
|
|
|
|
$serverlist = join("|", @serverlist);
|
|
# chop $serverlist;
|
|
|
|
# FIXME - Is this test supposed to test whether @serverlist is
|
|
# empty? If so, then a) there are better ways to do that in
|
|
# Perl (e.g., "if (@serverlist eq ())"), and b) it doesn't
|
|
# work anyway, since it checks whether $serverlist is composed
|
|
# of one or more spaces, which is never the case, not even
|
|
# when there are 0 or 1 elements in @serverlist.
|
|
if ( $serverlist !~ /^ +$/ ) {
|
|
# Don't allow reinsertion of the same request identifier.
|
|
$sth=$dbh->prepare("select identifier from z3950queue
|
|
where identifier=?");
|
|
$sth->execute($requestid);
|
|
if ( ! $sth->rows) {
|
|
$sth=$dbh->prepare("insert into z3950queue (term,type,servers, identifier) values (?, ?, ?, ?)");
|
|
$sth->execute($query, $type, $serverlist, $requestid);
|
|
if ( -r $pidfile ) {
|
|
# FIXME - Perl is good at opening files. No need to
|
|
# spawn a separate 'cat' process.
|
|
my $pid=`cat $pidfile`;
|
|
chomp $pid;
|
|
warn "PID : $pid";
|
|
# Kill -HUP the Z39.50 daemon to tell it to process
|
|
# this query.
|
|
my $processcount=kill 1, $pid;
|
|
if ($processcount==0) {
|
|
$error.="Z39.50 search daemon error: no process signalled. ";
|
|
}
|
|
} else {
|
|
# FIXME - Error-checking like this should go close
|
|
# to the test.
|
|
$error.="No Z39.50 search daemon running: no file $pidfile. ";
|
|
} # if $pidfile
|
|
} else {
|
|
# FIXME - Error-checking like this should go close
|
|
# to the test.
|
|
$error.="Duplicate request ID $requestid. ";
|
|
} # if rows
|
|
} else {
|
|
# FIXME - Error-checking like this should go close to the
|
|
# test. I.e.,
|
|
# return "No Z39.50 search servers specified. "
|
|
# if @serverlist eq ();
|
|
|
|
# server list is empty
|
|
$error.="No Z39.50 search servers specified. ";
|
|
} # if serverlist empty
|
|
|
|
return $error;
|
|
|
|
} # sub addz3950queue
|
|
|
|
=item &checkz3950searchdone
|
|
|
|
$numberpending= & &checkz3950searchdone($random);
|
|
|
|
Returns the number of pending z3950 requests
|
|
|
|
C<$random> is the random z3950 query number.
|
|
|
|
=cut
|
|
sub checkz3950searchdone {
|
|
my ($z3950random) = @_;
|
|
my $dbh = C4::Context->dbh;
|
|
# first, check that the deamon already created the requests...
|
|
my $sth = $dbh->prepare("select count(*) from z3950queue,z3950results where z3950queue.id = z3950results.queryid and z3950queue.identifier=?");
|
|
$sth->execute($z3950random);
|
|
my ($result) = $sth->fetchrow;
|
|
if ($result eq 0) { # search not yet begun => should be searches to do !
|
|
return "??";
|
|
}
|
|
# second, count pending requests
|
|
$sth = $dbh->prepare("select count(*) from z3950queue,z3950results where z3950queue.id = z3950results.queryid and z3950results.enddate is null and z3950queue.identifier=?");
|
|
$sth->execute($z3950random);
|
|
($result) = $sth->fetchrow;
|
|
return $result;
|
|
}
|
|
|
|
1;
|
|
__END__
|
|
|
|
=back
|
|
|
|
=head1 AUTHOR
|
|
|
|
Koha Developement team <info@koha.org>
|
|
|
|
=cut
|
|
|
|
#--------------------------------------
|
|
# $Log$
|
|
# Revision 1.14 2007/03/09 14:31:47 tipaul
|
|
# rel_3_0 moved to HEAD
|
|
#
|
|
# Revision 1.10.10.1 2006/12/22 15:09:54 toins
|
|
# removing C4::Database;
|
|
#
|
|
# Revision 1.10 2003/10/01 15:08:14 tipaul
|
|
# fix fog bug #622 : processz3950queue fails
|
|
#
|
|
# Revision 1.9 2003/04/29 16:50:51 tipaul
|
|
# really proud of this commit :-)
|
|
# z3950 search and import seems to works fine.
|
|
# Let me explain how :
|
|
# * a "search z3950" button is added in the addbiblio template.
|
|
# * when clicked, a popup appears and z3950/search.pl is called
|
|
# * z3950/search.pl calls addz3950search in the DB
|
|
# * the z3950 daemon retrieve the records and stores them in z3950results AND in marc_breeding table.
|
|
# * as long as there as searches pending, the popup auto refresh every 2 seconds, and says how many searches are pending.
|
|
# * when the user clicks on a z3950 result => the parent popup is called with the requested biblio, and auto-filled
|
|
#
|
|
# Note :
|
|
# * character encoding support : (It's a nightmare...) In the z3950servers table, a "encoding" column has been added. You can put "UNIMARC" or "USMARC" in this column. Depending on this, the char_decode in C4::Biblio.pm replaces marc-char-encode by an iso 8859-1 encoding. Note that in the breeding import this value has been added too, for a better support.
|
|
# * the marc_breeding and z3950* tables have been modified : they have an encoding column and the random z3950 number is stored too for convenience => it's the key I use to list only requested biblios in the popup.
|
|
#
|
|
# Revision 1.8 2003/04/29 08:09:45 tipaul
|
|
# z3950 support is coming...
|
|
# * 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.
|
|
# Note this is a 1st draft. More to follow (today ? I hope).
|
|
#
|
|
# Revision 1.7 2003/02/19 01:01:06 wolfpac444
|
|
# Removed the unecessary $dbh argument from being passed.
|
|
# Resolved a few minor FIXMEs.
|
|
#
|
|
# Revision 1.6 2002/10/13 08:30:53 arensb
|
|
# Deleted unused variables.
|
|
# Removed trailing whitespace.
|
|
#
|
|
# Revision 1.5 2002/10/13 06:13:23 arensb
|
|
# Removed bogus #! line (this isn't a script!)
|
|
# Removed unused global variables.
|
|
# Added POD.
|
|
# Added some explanatory comments.
|
|
# Added some FIXME comments.
|
|
#
|
|
# Revision 1.4 2002/10/11 12:35:35 arensb
|
|
# Replaced &requireDBI with C4::Context->dbh
|
|
#
|
|
# Revision 1.3 2002/08/14 18:12:52 tonnesen
|
|
# Added copyright statement to all .pl and .pm files
|
|
#
|
|
# Revision 1.2 2002/07/02 20:31:33 tonnesen
|
|
# module added from rel-1-2 branch
|
|
#
|
|
# Revision 1.1.2.5 2002/06/29 17:33:47 amillar
|
|
# Allow DEFAULT as input to addz3950search.
|
|
# Check for existence of pid file (cat crashed otherwise).
|
|
# Return error messages in addz3950search.
|
|
#
|
|
# Revision 1.1.2.4 2002/06/28 18:07:27 tonnesen
|
|
# marcimport.pl will print an error message if it can not signal the
|
|
# processz3950queue program. The message contains instructions for starting the
|
|
# daemon.
|
|
#
|
|
# Revision 1.1.2.3 2002/06/28 17:45:39 tonnesen
|
|
# z3950queue now listens for a -HUP signal before processing the queue. Z3950.pm
|
|
# sends the -HUP signal when queries are added to the queue.
|
|
#
|
|
# Revision 1.1.2.2 2002/06/26 20:54:31 tonnesen
|
|
# use warnings breaks on perl 5.005...
|
|
#
|
|
# Revision 1.1.2.1 2002/06/26 07:26:41 amillar
|
|
# New module for Z39.50 searching
|
|
#
|