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Item6739: Using MapIP2SID causes Perl "Can't locate" error

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AppliesTo: Component: Priority: CurrentState: WaitingFor: TargetRelease ReleasedIn
Engine (unknown) Urgent New   n/a  

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I first reported this in SID-01188. I have a TWiki 4.1 on an old Solaris server that I am migrating to TWiki 5 on a new Linux server. I set the Priority to Urgent because my users are used to persistent sessions, and will not tolerate having to log in every day, so I can't migrate till this is fixed.

The problem: We use MapIP2SID in TWiki 4.1 and it works. But in TWiki 5 when I turn on {Sessions}{MapIP2SID} in configure, viewing any TWiki page (except configure) breaks with a Perl error. Edit pages seem to load, but in the edit box where the topic content would be, I get There was a problem retrieving http://btnintra01//rest/WysiwygPlugin/tml2html: GENERAL 500. If I turn off MapID2SID, the errors go away and TWiki functions normally. From the Apache error log:

[Thu May 12 12:33:18 2011] [error] 
[Thu May 12 12:33:18 2011] -e: Can't locate object method "address" via package "TWiki::Request" at /web/twiki/lib/TWiki/LoginManager.pm line 235.\n
[Thu May 12 12:33:18 2011] -e:  at /web/twiki/lib/TWiki/LoginManager.pm line 235\n
    my $ip = $this->{twiki}->{request}->address;
[Thu May 12 12:33:18 2011] -e: \tTWiki::LoginManager::_IP2SID('TWiki::LoginManager::TemplateLogin=HASH(0x1e241640)') called at /web/twiki/lib/TWiki/LoginManager.pm line 316\n
        my $sid = $this->_IP2SID();
[Thu May 12 12:33:18 2011] -e: \tTWiki::LoginManager::loadSession('TWiki::LoginManager::TemplateLogin=HASH(0x1e241640)', 'undef') called at /web/twiki/lib/TWiki/Users.pm line 116\n
    $this->{loginManager} = TWiki::LoginManager::makeLoginManager( $session );
      $this->{loginManager}->loadSession( $session->{remoteUser} );
[Thu May 12 12:33:18 2011] -e: \tTWiki::Users::new('TWiki::Users', 'TWiki=HASH(0x1e1ebd60)') called at /web/twiki/lib/TWiki.pm line 1566\n
    my( $class, $login, $query, $initialContext ) = @_;
    my $this = bless( {}, $class );
[Thu May 12 12:33:18 2011] -e: \tTWiki::new('TWiki', 'undef', 'TWiki::Request=HASH(0x1e1f2dd0)', 'HASH(0x1e0138c0)') called at /web/twiki/lib/TWiki/UI.pm line 191\n
[Thu May 12 12:33:18 2011] -e: \tTWiki::UI::execute('TWiki::Request=HASH(0x1e1f2dd0)', 'CODE(0x1d580ff0)', 'view', 1) called at /web/twiki/lib/TWiki/UI.pm line 175\n
[Thu May 12 12:33:18 2011] -e: \tTWiki::UI::handleRequest('TWiki::Request=HASH(0x1e1f2dd0)') called at /web/twiki/lib/TWiki/Engine/CGI.pm line 47\n
[Thu May 12 12:33:18 2011] -e: \tTWiki::Engine::CGI::run('TWiki::Engine::CGI=HASH(0x1db95510)') called at /web/twiki/bin/view line 43\n
[Thu May 12 12:33:18 2011] -e: \tModPerl::ROOT::ModPerl::Registry::web_twiki_bin_view::handler('Apache2::RequestRec=SCALAR(0x1d86cd80)') called at /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/ModPerl/RegistryCooker.pm line 204\n
[Thu May 12 12:33:18 2011] -e: \teval {...} called at /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/ModPerl/RegistryCooker.pm line 204\n
[Thu May 12 12:33:18 2011] -e: \tModPerl::RegistryCooker::run('ModPerl::Registry=HASH(0x1d631600)') called at /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/ModPerl/RegistryCooker.pm line 170\n
[Thu May 12 12:33:18 2011] -e: \tModPerl::RegistryCooker::default_handler('ModPerl::Registry=HASH(0x1d631600)') called at /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/ModPerl/Registry.pm line 31\n
[Thu May 12 12:33:18 2011] -e: \tModPerl::Registry::handler('ModPerl::Registry', 'Apache2::RequestRec=SCALAR(0x1d86cd80)') called at -e line 0\n
[Thu May 12 12:33:18 2011] -e: \teval {...} called at -e line 0\n

See the SID-01188 attachment if you need my configure output.

-- TWiki:Main/JohnWorsley - 2011-06-01

I have made two changes to the code which appear to have fixed the problem.

Regarding the first one, there is no TWiki::Request::address method, but there is a remoteAddress method which appears to do exactly what address was expected to do.

Regarding the second one, LoginManager::Session::load is being passed the SID in the parameter which that $ENV{REMOTE_ADDR} line expects to be a method. The line appears to be unnecessary.

--- LoginManager.pm.orig        2010-10-10 23:15:40.000000000 -0700
+++ LoginManager.pm     2011-06-08 16:27:26.000000000 -0700
@@ -232,7 +232,7 @@
 sub _IP2SID {
     my( $this, $sid ) = @_;

-    my $ip = $this->{twiki}->{request}->address;
+    my $ip = $this->{twiki}->{request}->remoteAddress();

     return undef unless $ip; # no IP address, can't map

--- LoginManager/Session.pm.orig        2010-10-10 23:15:40.000000000 -0700
+++ LoginManager/Session.pm     2011-06-08 16:25:48.000000000 -0700
@@ -42,7 +42,7 @@
 sub load {
     my $this = shift;
     # local %ENV; # TWikibug:Item6583 - commented out
-    $ENV{REMOTE_ADDR} = @_ == 1 ? $_[0]->remoteAddress : $_[1]->remoteAddress;
+#    $ENV{REMOTE_ADDR} = @_ == 1 ? $_[0]->remoteAddress() : $_[1]->remoteAddress();

-- TWiki:Main.JohnWorsley - 2011-06-09

Thanks John for debugging and for the proposed fix, appreciated! It is important to set $ENV{REMOTE_ADDR}, I think this issue needs some more debugging.

-- TWiki:Main.PeterThoeny - 2011-06-17

I'm sure it does! I have not encountered any problems so far with that line commented out; I would rather have corrected the way $ENV{REMOTE_ADDR} is set, but don't have time right now. This is my first time poking around in the TWiki core, so it takes me a long time to figure anything out.

-- TWiki:Main.JohnWorsley - 2011-06-20

Summary Using MapIP2SID causes Perl "Can't locate" error
ReportedBy TWiki:Main.JohnWorsley
Codebase 5.0.1
SVN Range TWiki-5.1.0-trunk, Sun, 22 May 2011, build 21317
AppliesTo Engine
Component (unknown)
Priority Urgent
CurrentState New


TargetRelease n/a
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Topic revision: r4 - 2011-06-20 - JohnWorsley
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