Bug 15253: Add Koha::Logger based logging for SIP2

Now that we have Koha::Logger, we should use it in our SIP server. This
has the potential to make debugging SIP issue much easier. We should add
the userid for the sipuser to the namespace so we can allow for separate
files per sip user if wanted.

Also modifies the log4perl.conf to lazy-open filehandles to log files,
so the same config can be used with log-files needing different
permissions.

Test Plan:
1) Apply this patch set
2) Update the modififed log4perl.conf to your system
3) Restart your sip server
4) Tail your sip2.log, run some queries
5) Note you still get the same output messages as before, with the
   addition of the ip address and username ( if available )
   prefixing the message.

Based on original patches by Kyle Hall and additions by Olli-Antti
Kivilahti.

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>

C4/SIP/ILS.pm

@@ -6,7 +6,7 @@ package C4::SIP::ILS;
 
 use warnings;
 use strict;
-use Sys::Syslog qw(syslog);
+use C4::SIP::Sip qw(syslog);
 use Data::Dumper;
 
 use C4::SIP::ILS::Item;

C4/SIP/ILS/Item.pm

@@ -9,7 +9,7 @@ package C4::SIP::ILS::Item;
 use strict;
 use warnings;
 
-use Sys::Syslog qw(syslog);
+use C4::SIP::Sip qw(syslog);
 use Carp;
 use Template;
 

C4/SIP/ILS/Patron.pm

@@ -12,7 +12,7 @@ use warnings;
 use Exporter;
 use Carp;
 
-use Sys::Syslog qw(syslog);
+use C4::SIP::Sip qw(syslog);
 use Data::Dumper;
 
 use C4::SIP::Sip qw(add_field);

C4/SIP/ILS/Transaction/Checkout.pm

@@ -8,7 +8,7 @@ use warnings;
 use strict;
 
 use POSIX qw(strftime);
-use Sys::Syslog qw(syslog);
+use C4::SIP::Sip qw(syslog);
 use Data::Dumper;
 use CGI qw ( -utf8 );
 

C4/SIP/ILS/Transaction/RenewAll.pm

@@ -6,7 +6,7 @@ package C4::SIP::ILS::Transaction::RenewAll;
 use strict;
 use warnings;
 
-use Sys::Syslog qw(syslog);
+use C4::SIP::Sip qw(syslog);
 
 use C4::SIP::ILS::Item;
 

C4/SIP/SIPServer.pm

@@ -5,18 +5,23 @@ use strict;
 use warnings;
 use FindBin qw($Bin);
 use lib "$Bin";
-use Sys::Syslog qw(syslog);
 use Net::Server::PreFork;
 use IO::Socket::INET;
 use Socket qw(:DEFAULT :crlf);
+use Scalar::Util qw(blessed);
 require UNIVERSAL::require;
 
 use C4::Context;
+use C4::SIP::Sip qw(syslog);
 use C4::SIP::Sip::Constants qw(:all);
 use C4::SIP::Sip::Configuration;
 use C4::SIP::Sip::Checksum qw(checksum verify_cksum);
 use C4::SIP::Sip::MsgType qw( handle login_core );
 
+use Koha::Logger;
+use C4::SIP::Trapper;
+tie *STDERR, "C4::SIP::Trapper";
+
 use base qw(Net::Server::PreFork);
 
 use constant LOG_SIP => "local6"; # Local alias for the logging facility
@@ -80,6 +85,9 @@ __PACKAGE__ ->run(@parms);
 # Child
 #
 
+my $activeSIPServer;
+my $activeLogger;
+
 # process_request is the callback used by Net::Server to handle
 # an incoming connection request.
 
@@ -91,6 +99,13 @@ sub process_request {
 
     $self->{config} = $config;
 
+    $self->{account} = undef;  # Clear out the account from the last request, it may be different
+    $self->{logger} = _set_logger( Koha::Logger->get( { interface => 'sip' } ) );
+
+    # Flush previous MDCs to prevent accidentally leaking incorrect MDC-entries
+    Log::Log4perl::MDC->put( "accountid", undef );
+    Log::Log4perl::MDC->put( "peeraddr",  undef );
+
     my $sockname = getsockname(STDIN);
 
     # Check if socket connection is IPv6 before resolving address
@@ -156,6 +171,19 @@ sub raw_transport {
     }
     alarm 0;
 
+    $self->{logger} = _set_logger(
+        Koha::Logger->get(
+            {
+                interface => 'sip',
+                category  => $self->{account}->{id}, # Add id to namespace
+            }
+        )
+    );
+
+    # Set MDCs after properly authenticating
+    Log::Log4perl::MDC->put( "accountid", $self->{account}->{id} );
+    Log::Log4perl::MDC->put( "peeraddr",  $self->{server}->{peeraddr} );
+
     syslog("LOG_DEBUG", "raw_transport: uname/inst: '%s/%s'",
         $self->{account}->{id},
         $self->{account}->{institution});
@@ -393,6 +421,58 @@ sub get_timeout {
     }
 }
 
+=head2 get_SIPServer
+
+    my $sipServer = C4::SIP::SIPServer::get_SIPServer()
+
+@RETURNS C4::SIP::SIPServer, the current server's child-process used to handle this SIP-transaction
+
+=cut
+
+sub get_SIPServer {
+    unless($activeSIPServer) {
+        my @cc = caller(1);
+        die "$cc[3]() asks for \$activeSIPServer, but he is not defined yet";
+    }
+    return $activeSIPServer;
+}
+
+sub _set_SIPServer {
+    my ($sipServer) = @_;
+    unless (blessed($sipServer) && $sipServer->isa('C4::SIP::SIPServer')) {
+        my @cc = caller(0);
+        die "$cc[3]():> \$sipServer '$sipServer' is not a C4::SIP::SIPServer-object";
+    }
+    $activeSIPServer = $sipServer;
+    return $activeSIPServer;
+}
+
+=head2 get_logger
+
+    my $logger = C4::SIP::SIPServer::get_logger()
+
+@RETURNS Koha::Logger, the logger used to log this SIP-transaction
+
+=cut
+
+sub get_logger {
+    unless($activeLogger) {
+        my @cc = caller(1);
+        die "$cc[3]() asks for \$activeLogger, but he is not defined yet";
+    }
+    return $activeLogger;
+}
+
+sub _set_logger {
+    my ($logger) = @_;
+    unless (blessed($logger) && $logger->isa('Koha::Logger')) {
+        my @cc = caller(0);
+        die "$cc[3]():> \$logger '$logger' is not a Koha::Logger-object";
+    }
+    $activeLogger = $logger;
+    return $activeLogger;
+}
+
 1;
 
 __END__

C4/SIP/Sip.pm

@@ -8,7 +8,6 @@ use strict;
 use warnings;
 use Exporter;
 use Encode;
-use Sys::Syslog qw(syslog);
 use POSIX qw(strftime);
 use Socket qw(:crlf);
 use IO::Handle;
@@ -21,13 +20,13 @@ use base qw(Exporter);
 our @EXPORT_OK = qw(y_or_n timestamp add_field maybe_add add_count
     denied sipbool boolspace write_msg
     $error_detection $protocol_version $field_delimiter
-    $last_response);
+    $last_response syslog);
 
 our %EXPORT_TAGS = (
     all => [qw(y_or_n timestamp add_field maybe_add
         add_count denied sipbool boolspace write_msg
         $error_detection $protocol_version
-        $field_delimiter $last_response)]);
+        $field_delimiter $last_response syslog)]);
 
 our $error_detection = 0;
 our $protocol_version = 1;
@@ -193,4 +192,19 @@ sub write_msg {
     $last_response = $msg;
 }
 
+sub syslog {
+    my ( $level, $mask, @args ) = @_;
+
+    my $method =
+        $level eq 'LOG_ERR'     ? 'error'
+      : $level eq 'LOG_DEBUG'   ? 'debug'
+      : $level eq 'LOG_INFO'    ? 'info'
+      : $level eq 'LOG_WARNING' ? 'warn'
+      :                           'error';
+
+    my $message = @args ? sprintf($mask, @args) : $mask;
+
+    C4::SIP::SIPServer::get_logger()->$method($message);
+}
+
 1;

C4/SIP/Sip/Configuration.pm

@@ -10,6 +10,8 @@ use strict;
 use warnings;
 use XML::Simple qw(:strict);
 
+use C4::SIP::Sip qw(syslog);
+
 my $parser = new XML::Simple(
     KeyAttr => {
         login       => '+id',
@@ -63,7 +65,7 @@ sub find_service {
     my $portstr;
     foreach my $addr ( '', '*:', "$sockaddr:", "[$sockaddr]:" ) {
         $portstr = sprintf( "%s%s/%s", $addr, $port, lc $proto );
-        Sys::Syslog::syslog( "LOG_DEBUG",
+        syslog( "LOG_DEBUG",
             "Configuration::find_service: Trying $portstr" );
         last if ( exists( ( $self->{listeners} )->{$portstr} ) );
     }

C4/SIP/Sip/MsgType.pm

@@ -9,7 +9,6 @@ package C4::SIP::Sip::MsgType;
 use strict;
 use warnings;
 use Exporter;
-use Sys::Syslog qw(syslog);
 
 use C4::SIP::Sip qw(:all);
 use C4::SIP::Sip::Constants qw(:all);

C4/SIP/Trapper.pm

@@ -0,0 +1,22 @@
+package C4::SIP::Trapper;
+
+use Modern::Perl;
+
+use Koha::Logger;
+
+sub TIEHANDLE {
+    my $class = shift;
+    bless [], $class;
+}
+
+sub PRINT {
+    my $self = shift;
+    $Log::Log4perl::caller_depth++;
+    my $logger =
+      Koha::Logger->get( { interface => 'sip', category => 'STDERR' } );
+    warn @_;
+    $logger->error(@_);
+    $Log::Log4perl::caller_depth--;
+}
+
+1;

Koha/Logger.pm

@@ -159,11 +159,14 @@ sub _check_conf {    # check logfiles in log4perl config (at initialization)
         if ( $l =~ /(OPAC|INTRANET)\.filename\s*=\s*(.*)\s*$/i ) {
 
             # we only check the two default logfiles, skipping additional ones
-            return if !-w $2;
+            if ( !-w $2 ) {
+                warn "Log file $2 is not writable!";
+                return;
+            };
             push @logs, $1 . ':' . $2;
         }
     }
-    return if !@logs;    # we should find one
+    return unless @logs; # we should find one
     return \@logs;
 }
 

etc/log4perl.conf

@@ -2,6 +2,9 @@ log4perl.logger.intranet = WARN, INTRANET
 log4perl.appender.INTRANET=Log::Log4perl::Appender::File
 log4perl.appender.INTRANET.filename=__LOG_DIR__/intranet-error.log
 log4perl.appender.INTRANET.mode=append
+log4perl.appender.INTRANET.create_at_logtime=true
+log4perl.appender.INTRANET.syswrite=true
+log4perl.appender.INTRANET.recreate=true
 log4perl.appender.INTRANET.layout=PatternLayout
 log4perl.appender.INTRANET.layout.ConversionPattern=[%d] [%p] %m %l %n
 
@@ -9,5 +12,18 @@ log4perl.logger.opac = WARN, OPAC
 log4perl.appender.OPAC=Log::Log4perl::Appender::File
 log4perl.appender.OPAC.filename=__LOG_DIR__/opac-error.log
 log4perl.appender.OPAC.mode=append
+log4perl.appender.OPAC.create_at_logtime=true
+log4perl.appender.OPAC.syswrite=true
+log4perl.appender.OPAC.recreate=true
 log4perl.appender.OPAC.layout=PatternLayout
 log4perl.appender.OPAC.layout.ConversionPattern=[%d] [%p] %m %l %n
+
+log4perl.logger.sip = DEBUG, SIP
+log4perl.appender.SIP=Log::Log4perl::Appender::File
+log4perl.appender.SIP.filename=__LOG_DIR__/sip2.log
+log4perl.appender.SIP.mode=append
+log4perl.appender.SIP.create_at_logtime=true
+log4perl.appender.SIP.syswrite=true
+log4perl.appender.SIP.recreate=true
+log4perl.appender.SIP.layout=PatternLayout
+log4perl.appender.SIP.layout.ConversionPattern=[%d] [%p] %X{accountid}@%X{peeraddr}: %m %l %n