431 lines
11 KiB
Perl
431 lines
11 KiB
Perl
package WebGUI::Session::ErrorHandler;
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=head1 LEGAL
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-------------------------------------------------------------------
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WebGUI is Copyright 2001-2006 Plain Black Corporation.
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-------------------------------------------------------------------
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Please read the legal notices (docs/legal.txt) and the license
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(docs/license.txt) that came with this distribution before using
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this software.
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-------------------------------------------------------------------
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http://www.plainblack.com info@plainblack.com
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-------------------------------------------------------------------
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=cut
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use strict;
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use Log::Log4perl;
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use Apache2::RequestUtil;
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=head1 NAME
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Package WebGUI::Session::ErrorHandler
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=head1 DESCRIPTION
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This package provides simple but effective error handling, debugging, and logging for WebGUI.
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=head1 SYNOPSIS
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use WebGUI::Session::ErrorHandler;
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my $errorHandler = WebGUI::ErrorHandler->new($session);
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$errorHandler->audit($message);
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$errorHandler->debug($message);
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$errorHandler->error($message);
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$errorHandler->fatal($message);
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$errorHandler->info($message);
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$errorHandler->security($message);
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$errorHandler->warn($message);
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$logger = $errorHandler->getLogger;
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$text = $errorHandler->getSessionVars;
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$text = $errorHandler->getStackTrace;
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$html = $errorHandler->showDebug;
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=head1 METHODS
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These methods are available from this class:
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=cut
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#-------------------------------------------------------------------
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=head2 audit ( message )
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A convenience function that wraps info() and includes the current username and user ID in addition to the message being logged.
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=head3 message
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Whatever message you wish to insert into the log.
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=cut
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sub audit {
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my $self = shift;
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my $message = shift;
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$self->info($self->session->user->username." (".$self->session->user->userId.") ".$message);
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}
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#-------------------------------------------------------------------
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=head2 canShowDebug ( )
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Returns true if the user meets the condition to see debugging information and debug mode is enabled.
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=cut
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sub canShowDebug {
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my $self = shift;
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return 0 unless ($self->session->setting->get("showDebug"));
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return 1 if ($self->session->setting->get("debugIp") eq "");
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my @ips = split(" ",$self->session->setting->get("debugIp"));
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my $ok = 0;
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foreach my $ip (@ips) {
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if ($self->session->env->get("REMOTE_ADDR") =~ /^$ip/) {
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$ok = 1;
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last;
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}
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}
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return $ok;
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}
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#-------------------------------------------------------------------
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=head2 canShowPerformanceIndicators ()
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Returns true if the user meets the conditions to see performance indicators and performance indicators are enabled.
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=cut
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sub canShowPerformanceIndicators {
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my $self = shift;
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my $mask = $self->session->setting->get("debugIp");
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my $ip = $self->session->env->get("REMOTE_ADDR");
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return (
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(
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$self->session->setting->get("showPerformanceIndicators")
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) && (
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$ip =~ /^$mask/ ||
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$self->session->setting->get("debugIp") eq ""
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)
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);
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}
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#-------------------------------------------------------------------
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=head2 debug ( message )
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Adds a DEBUG type message to the log. These events should be things that are only used for diagnostic purposes.
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=head3 message
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The message you wish to add to the log.
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=cut
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sub debug {
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my $self = shift;
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my $message = shift;
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$self->getLogger->debug($message);
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$self->session->stow->set("debug_debug", $self->session->stow->get("debug_debug").$message."\n");
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}
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#-------------------------------------------------------------------
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=head DESTROY ( )
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Deconstructor.
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=cut
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sub DESTROY {
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my $self = shift;
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$Log::Log4perl::caller_depth--;
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undef $self;
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}
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#-------------------------------------------------------------------
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=head2 error ( message )
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Adds a ERROR type message to the log. These events should be things that are errors that are not fatal. For instance, a non-compiling plug-in or erroneous user input.
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=head3 message
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The message you wish to add to the log.
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=cut
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sub error {
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my $self = shift;
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my $message = shift;
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$self->getLogger->error($message);
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print("\n\n".$message.":\n".$self->getStackTrace());
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$self->getLogger->debug("Stack trace for ERROR ".$message."\n".$self->getStackTrace());
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$self->session->stow->set("debug_error", $self->session->stow->get("debug_error").$message."\n");
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}
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#-------------------------------------------------------------------
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=head2 fatal ( )
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Adds a FATAL type message to the log, outputs an error message to the user, and forces a close on the session. This should only be called if the system cannot recover from an error, or it would be unsafe to recover from an error like database connectivity problems.
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=cut
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sub fatal {
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my $self = shift;
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my $message = shift;
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$self->session->http->setStatus("500","Server Error");
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Apache2::RequestUtil->request->content_type('text/html') if ($self->session->request);
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$self->getLogger->fatal($message);
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$self->getLogger->debug("Stack trace for FATAL ".$message."\n".$self->getStackTrace());
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print $self->session->http->getHeader if ($self->session->request);
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unless ($self->canShowDebug()) {
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#NOTE: You can't internationalize this because with some types of errors that would cause an infinite loop.
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print "<h1>Problem With Request</h1>
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We have encountered a problem with your request. Please use your back button and try again.
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If this problem persists, please contact us with what you were trying to do and the time and date of the problem.";
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print '<br />'.$self->session->setting("companyName");
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print '<br />'.$self->session->setting("companyEmail");
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print '<br />'.$self->session->setting("companyURL");
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} else {
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print "<h1>WebGUI Fatal Error</h1><p>Something unexpected happened that caused this system to fault.</p>\n";
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print "<p>".$message."</p>\n";
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print $self->showDebug();
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}
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$self->session->close();
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die $message;
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}
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#-------------------------------------------------------------------
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=head2 getLogger ( )
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Returns a reference to the logger.
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=cut
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sub getLogger {
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my $self = shift;
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return $self->{_logger};
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}
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#-------------------------------------------------------------------
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=head2 getSessionVars ( )
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Returns a text message containing all of the session variables.
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=cut
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sub getSessionVars {
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my $self = shift;
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my $data;
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while (my ($section, $hash) = each %{$self->session}) {
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if (ref $hash eq 'HASH') {
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while (my ($key, $value) = each %$hash) {
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if (ref $value eq 'ARRAY') {
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$value = '['.join(', ',@$value).']';
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} elsif (ref $value eq 'HASH') {
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$value = '{'.join(', ',map {"$_ => $value->{$_}"} keys %$value).'}';
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}
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unless (lc($key) eq "password" || lc($key) eq "identifier" || lc($key) eq "dbpass") {
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$data .= "\t".$section.'.'.$key.' = '.$value."\n";
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}
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}
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} elsif (ref $hash eq 'ARRAY') {
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my $i = 1;
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foreach (@$hash) {
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$data .= "\t".$section.'.'.$i.' = '.$_."\n";
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$i++;
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}
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}
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}
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return $data;
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}
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#-------------------------------------------------------------------
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=head2 getStackTrace ( )
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Returns a text formatted message containing the current stack trace.
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=cut
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sub getStackTrace {
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my $self = shift;
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my $i = 2;
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my $output;
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while (my @data = caller($i)) {
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$output .= "\t".join(",",@data)."\n";
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$i++;
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}
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return $output;
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}
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#-------------------------------------------------------------------
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=head2 info ( message )
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Adds an INFO type message to the log. This should be used for informational or status types of messages, such as audit information and FYIs.
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=head3 message
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The message you wish to add to the log.
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=cut
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sub info {
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my $self = shift;
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my $message = shift;
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$self->getLogger->info($message);
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$self->session->stow->set("debug_info") = $self->session->stow->get("debug_info").$message."\n";
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}
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#-------------------------------------------------------------------
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=head2 new ( session )
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Constructor. Instanciates a new error handler instance.
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=head3 session
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An active WebGUI::Session object.
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=cut
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sub new {
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my $class = shift;
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my $session = shift; use WebGUI; WebGUI::dumpSession($session);
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unless (Log::Log4perl->initialized()) {
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$Log::Log4perl::caller_depth++;
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Log::Log4perl->init( $session->config->getWebguiRoot."/etc/log.conf" );
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}
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my $logger = Log::Log4perl->get_logger($session->config->getFilename);
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bless {_queryCount=>0, _logger=>$logger, _session=>$session}, $class;
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}
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#-------------------------------------------------------------------
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=head2 query ( sql )
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Logs a sql statement for the debugger output. Keeps track of the #.
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=head3 sql
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A sql statement string.
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=cut
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sub query {
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my $self = shift;
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$self->{_queryCount}++;
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$self->debug("query ".$self->{_queryCount}.': '.shift);
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}
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#-------------------------------------------------------------------
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=head2 security ( message )
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A convenience function that wraps warn() and includes the current username, user ID, and IP address in addition to the message being logged.
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=head3 message
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The message you wish to add to the log.
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=cut
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sub security {
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my $self = shift;
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my $message = shift;
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$self->warn($self->session->user->username." (".$self->session->user->userId.") connecting from "
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.$self->session->env->get("REMOTE_ADDR")." attempted to ".$message);
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}
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#-------------------------------------------------------------------
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=head2 session ( )
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Returns a reference to the current session.
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=cut
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sub session {
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my $self = shift;
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return $self->{_session};
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}
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#-------------------------------------------------------------------
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=head2 showDebug ( )
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Creates an HTML formatted string
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=cut
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sub showDebug {
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my $self = shift;
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my $text = $self->session->stow->get('debug_error');
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$text =~ s/\n/\<br \/\>\n/g;
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my $output = 'beginDebug<br /><div style="background-color: #800000;color: #ffffff;">'.$text."</div>\n";
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$text = $self->session->stow->get('debug_warn');
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$text =~ s/\n/\<br \/\>\n/g;
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$output .= '<div style="background-color: #ffdddd;color: #000000;">'.$text."</div>\n";
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$text = $self->session->stow->get('debug_info');
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$text =~ s/\n/\<br \/\>\n/g;
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$output .= '<div style="background-color: #ffffdd;color: #000000;">'.$text."</div>\n";
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$text = $self->session->stow->get('debug_debug');
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$text =~ s/\n/\<br \/\>\n/g;
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$output .= '<div style="background-color: #dddddd;color: #000000;">'.$text."</div>\n";
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$text = $self->getSessionVars();
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$text =~ s/\n/\<br \/\>\n/g;
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$output .= '<div style="background-color: #ffffff;color: #000000;">'.$text."</div>\n";
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return $output;
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}
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#-------------------------------------------------------------------
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=head2 warn ( message )
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Adds a WARN type message to the log. These events should be things that are potentially severe, but not errors, such as security attempts or ineffiency problems.
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=head3 message
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The message you wish to add to the log.
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=cut
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sub warn {
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my $self = shift;
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my $message = shift;
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$self->getLogger->warn($message);
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$self->session->stow->set("debug_warn", $self->session->stow->get("debug_warn").$message."\n");
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}
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1;
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