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revision 1.98, Thu May 1 07:52:10 2008 UTC revision 1.127, Wed Dec 16 20:32:19 2009 UTC
# Line 18  Line 18 
18    
19  package Tracer;  package Tracer;
20    
     require Exporter;  
     @ISA = ('Exporter');  
     @EXPORT = qw(Trace T TSetup QTrace Confess Cluck Min Max Assert Open OpenDir TICK StandardSetup EmergencyKey ETracing Constrain Insure ChDir Emergency);  
     @EXPORT_OK = qw(GetFile GetOptions Merge MergeOptions ParseCommand ParseRecord UnEscape Escape PrintLine PutLine);  
21      use strict;      use strict;
22        use base qw(Exporter);
23        use vars qw(@EXPORT @EXPORT_OK);
24        @EXPORT = qw(Trace T TSetup QTrace Confess MemTrace Cluck Min Max Assert Open OpenDir TICK StandardSetup EmergencyKey ETracing Constrain Insure ChDir Emergency Warn TraceDump IDHASH);
25        @EXPORT_OK = qw(GetFile GetOptions Merge MergeOptions ParseCommand ParseRecord UnEscape Escape PrintLine PutLine);
26      use Carp qw(longmess croak carp);      use Carp qw(longmess croak carp);
27      use CGI;      use CGI;
28      use Cwd;      use Cwd;
# Line 36  Line 36 
36      use Time::HiRes 'gettimeofday';      use Time::HiRes 'gettimeofday';
37      use URI::Escape;      use URI::Escape;
38      use Time::Local;      use Time::Local;
39        use POSIX qw(strftime);
40        use Time::Zone;
41        use Fcntl qw(:DEFAULT :flock);
42        use Data::Dumper;
43    
44    
45  =head1 Tracing and Debugging Helpers  =head1 Tracing and Debugging Helpers
46    
# Line 204  Line 209 
209  my $LastLevel = 0;          # level of the last test call  my $LastLevel = 0;          # level of the last test call
210  my $SetupCount = 0;         # number of times TSetup called  my $SetupCount = 0;         # number of times TSetup called
211  my $AllTrace = 0;           # TRUE if we are tracing all categories.  my $AllTrace = 0;           # TRUE if we are tracing all categories.
212    my $SavedCGI;               # CGI object passed to ETracing
213    my $CommandLine;            # Command line passed to StandardSetup
214    my $Confessions = 0;        # confession count
215    umask 2;                    # Fix the damn umask so everything is group-writable.
216    
217  =head2 Tracing Methods  =head2 Tracing Methods
218    
# Line 480  Line 489 
489          # Push the message into the queue.          # Push the message into the queue.
490          push @Queue, "$formatted";          push @Queue, "$formatted";
491      } elsif ($Destination eq "HTML") {      } elsif ($Destination eq "HTML") {
492          # Convert the message to HTML and write it to the standard output.          # Convert the message to HTML.
493          my $escapedMessage = CGI::escapeHTML($stripped);          my $escapedMessage = CGI::escapeHTML($stripped);
494          print "<p>$timeStamp $LastCategory $LastLevel: $escapedMessage</p>\n";          # The stuff after the first line feed should be pre-formatted.
495            my @lines = split /\s*\n/, $escapedMessage;
496            # Get the normal portion.
497            my $line1 = shift @lines;
498            print "<p>$timeStamp $LastCategory $LastLevel: $line1</p>\n";
499            if (@lines) {
500                print "<pre>" . join("\n", @lines, "</pre>");
501            }
502      } elsif ($Destination =~ m/^>>/) {      } elsif ($Destination =~ m/^>>/) {
503          # Write the trace message to an output file.          # Write the trace message to an output file.
504          open(TRACING, $Destination) || die "Tracing open for \"$Destination\" failed: $!";          open(TRACING, $Destination) || die "Tracing open for \"$Destination\" failed: $!";
505            # Lock the file.
506            flock TRACING, LOCK_EX;
507          print TRACING "$formatted\n";          print TRACING "$formatted\n";
508          close TRACING;          close TRACING;
509          # If the Tee flag is on, echo it to the standard output.          # If the Tee flag is on, echo it to the standard output.
# Line 495  Line 513 
513      }      }
514  }  }
515    
516    =head3 MemTrace
517    
518        MemTrace($message);
519    
520    Output a trace message that includes memory size information.
521    
522    =over 4
523    
524    =item message
525    
526    Message to display. The message will be followed by a sentence about the memory size.
527    
528    =back
529    
530    =cut
531    
532    sub MemTrace {
533        # Get the parameters.
534        my ($message) = @_;
535        my $memory = GetMemorySize();
536        Trace("$message $memory in use.");
537    }
538    
539    
540    =head3 TraceDump
541    
542        TraceDump($title, $object);
543    
544    Dump an object to the trace log. This method simply calls the C<Dumper>
545    function, but routes the output to the trace log instead of returning it
546    as a string. The output is arranged so that it comes out monospaced when
547    it appears in an HTML trace dump.
548    
549    =over 4
550    
551    =item title
552    
553    Title to give to the object being dumped.
554    
555    =item object
556    
557    Reference to a list, hash, or object to dump.
558    
559    =back
560    
561    =cut
562    
563    sub TraceDump {
564        # Get the parameters.
565        my ($title, $object) = @_;
566        # Trace the object.
567        Trace("Object dump for $title:\n" . Dumper($object));
568    }
569    
570  =head3 T  =head3 T
571    
572      my $switch = T($category, $traceLevel);      my $switch = T($category, $traceLevel);
# Line 553  Line 625 
625          $LastLevel = $traceLevel;          $LastLevel = $traceLevel;
626          # Convert it to lower case before we hash it.          # Convert it to lower case before we hash it.
627          $category = lc $category;          $category = lc $category;
628          # Use the category and tracelevel to compute the result.          # Validate the trace level.
629          if (ref $traceLevel) {          if (ref $traceLevel) {
630              Confess("Bad trace level.");              Confess("Bad trace level.");
631          } elsif (ref $TraceLevel) {          } elsif (ref $TraceLevel) {
632              Confess("Bad trace config.");              Confess("Bad trace config.");
633          }          }
634          $retVal = ($traceLevel <= $TraceLevel && ($AllTrace || exists $Categories{$category}));          # Make the check. Note that level 0 shows even if the category is turned off.
635            $retVal = ($traceLevel <= $TraceLevel && ($traceLevel == 0 || $AllTrace || exists $Categories{$category}));
636      }      }
637      # Return the computed result.      # Return the computed result.
638      return $retVal;      return $retVal;
# Line 636  Line 709 
709      # Set up the category and level.      # Set up the category and level.
710      $LastCategory = "(confess)";      $LastCategory = "(confess)";
711      $LastLevel = 0;      $LastLevel = 0;
     if (! defined($FIG_Config::no_tool_hdr)) {  
         # Here we have a tool header. Display its length so that the user can adjust the line numbers.  
         my $toolHeaderFile = "$FIG_Config::fig_disk/dist/releases/current/$FIG_Config::arch/tool_hdr";  
         # Only proceed if the tool header file is actually present.  
         if (-f $toolHeaderFile) {  
             my $fh;  
             if (open $fh, "<$toolHeaderFile") {  
                 my @lines = <$fh>;  
                 Trace("Tool header has " . scalar(@lines) . " lines.");  
             }  
         }  
     }  
712      # Trace the call stack.      # Trace the call stack.
713      Cluck($message);      Cluck($message);
714        # Increment the confession count.
715        $Confessions++;
716      # Abort the program.      # Abort the program.
717      croak(">>> $message");      croak(">>> $message");
718  }  }
719    
720    =head3 Confessions
721    
722        my $count = Tracer::Confessions();
723    
724    Return the number of calls to L</Confess> by the current task.
725    
726    =cut
727    
728    sub Confessions {
729        return $Confessions;
730    }
731    
732    
733    =head3 SaveCGI
734    
735        Tracer::SaveCGI($cgi);
736    
737    This method saves the CGI object but does not activate emergency tracing.
738    It is used to allow L</Warn> to work in situations where emergency
739    tracing is contra-indicated (e.g. the wiki).
740    
741    =over 4
742    
743    =item cgi
744    
745    Active CGI query object.
746    
747    =back
748    
749    =cut
750    
751    sub SaveCGI {
752        $SavedCGI = $_[0];
753    }
754    
755    =head3 Warn
756    
757        Warn($message, @options);
758    
759    This method traces an important message. If an RSS feed is configured
760    (via I<FIG_Config::error_feed>) and the tracing destination is C<WARN>,
761    then the message will be echoed to the feed. In general, a tracing
762    destination of C<WARN> indicates that the caller is running as a web
763    service in a production environment; however, this is not a requirement.
764    
765    To force warnings into the RSS feed even when the tracing destination
766    is not C<WARN>, simply specify the C<Feed> tracing module. This can be
767    configured automatically when L</StandardSetup> is used.
768    
769    The L</Cluck> method calls this one for its final message. Since
770    L</Confess> calls L</Cluck>, this means that any error which is caught
771    and confessed will put something in the feed. This insures that someone
772    will be alerted relatively quickly when a failure occurs.
773    
774    =over 4
775    
776    =item message
777    
778    Message to be traced.
779    
780    =item options
781    
782    A list containing zero or more options.
783    
784    =back
785    
786    The permissible options are as follows.
787    
788    =over 4
789    
790    =item noStack
791    
792    If specified, then the stack trace is not included in the output.
793    
794    =back
795    
796    =cut
797    
798    sub Warn {
799        # Get the parameters.
800        my $message = shift @_;
801        my %options = map { $_ => 1 } @_;
802        # Save $@;
803        my $savedError = $@;
804        # Trace the message.
805        Trace($message);
806        # This will contain the lock handle. If it's defined, it means we need to unlock.
807        my $lock;
808        # Check for feed forcing.
809        my $forceFeed = exists $Categories{feed};
810        # An error here would be disastrous. Note that if debug mode is specified,
811        # we do this stuff even in a test environment.
812        eval {
813            # Do we need to put this in the RSS feed?
814            if ($FIG_Config::error_feed && ($Destination eq 'WARN' || $forceFeed)) {
815                # Probably. We need to check first, however, to see if it's from an
816                # ignored IP. For non-CGI situations, we default the IP to the self-referent.
817                my $key = "127.0.0.1";
818                if (defined $SavedCGI) {
819                    # Get the IP address.
820                    $key = $ENV{HTTP_X_FORWARDED_FOR} || $ENV{REMOTE_ADDR};
821                }
822                # Is the IP address in the ignore list?
823                my $found = scalar(grep { $_ eq $key } @FIG_Config::error_ignore_ips);
824                if (! $found) {
825                    # No. We're good. We now need to compute the date, the link, and the title.
826                    # First, the date, in a very specific format.
827                    my $date = strftime("%a, %02e %b %H:%M:%S %Y ", localtime) .
828                        (tz_local_offset() / 30);
829                    # Environment data goes in here. We start with the date.
830                    my $environment = "$date.  ";
831                    # If we need to recap the message (because it's too long to be a title), we'll
832                    # put it in here.
833                    my $recap;
834                    # Copy the message and remove excess space.
835                    my $title = $message;
836                    $title =~ s/\s+/ /gs;
837                    # If it's too long, we have to split it up.
838                    if (length $title > 60) {
839                        # Put the full message in the environment string.
840                        $recap = $title;
841                        # Excerpt it as the title.
842                        $title = substr($title, 0, 50) . "...";
843                    }
844                    # If we have a CGI object, then this is a web error. Otherwise, it's
845                    # command-line.
846                    if (defined $SavedCGI) {
847                        # We're in a web service. The environment is the user's IP, and the link
848                        # is the URL that got us here.
849                        $environment .= "Event Reported at IP address $key process $$.";
850                        my $url = $SavedCGI->self_url();
851                        # We need the user agent string and (if available) the referrer.
852                        # The referrer will be the link.
853                        $environment .= " User Agent $ENV{HTTP_USER_AGENT}";
854                        if ($ENV{HTTP_REFERER}) {
855                            my $link = $ENV{HTTP_REFERER};
856                            $environment .= " referred from <a href=\"$link\">$link</a>.";
857                        } else {
858                            $environment .= " referrer unknown.";
859                        }
860                        # Close off the sentence with the original link.
861                        $environment .= " URL of event is <a href=\"$url\">$url</a>.";
862                    } else {
863                        # No CGI object, so we're a command-line tool. Use the tracing
864                        # key and the PID as the user identifier, and add the command.
865                        my $key = EmergencyKey();
866                        $environment .= "Event Reported by $key process $$.";
867                        if ($CommandLine) {
868                            # We're in a StandardSetup script, so we have the real command line.
869                            $environment .= "\n<pre>" . CGI::escapeHTML($CommandLine) . "</pre>\n";
870                        } elsif ($ENV{_}) {
871                            # We're in a BASH script, so the command has been stored in the _ variable.
872                            $environment .= "  Command = " . CGI::escapeHTML($ENV{_}) . "\n";
873                        }
874                    }
875                    # Build a GUID. We use the current time, the title, and the process ID,
876                    # then digest the result.
877                    my $guid = Digest::MD5::md5_base64(gettimeofday(), $title, $$);
878                    # Finally, the description. This is a stack trace plus various environmental stuff.
879                    # The trace is optional.
880                    my $stackTrace;
881                    if ($options{noStack}) {
882                        $stackTrace = "";
883                    } else {
884                        my @trace = LongMess();
885                        # Only proceed if we got something back.
886                        if (scalar(@trace) > 0) {
887                            $trace[0] =~ s/Tracer::Warn.+?called/Event occurred/;
888                            $stackTrace = "Stack trace:<pre>" . join("\n", @trace, "</pre>");
889                        }
890                    }
891                    # We got the stack trace. Now it's time to put it all together.
892                    # We have a goofy thing here in that we need to HTML-escape some sections of the description
893                    # twice. They will be escaped once here, and then once when written by XML::Simple. They are
894                    # unescaped once when processed by the RSS reader, and stuff in the description is treated as
895                    # HTML. So, anything escaped here is treated as a literal when viewed in the RSS reader, but
896                    # our <br>s and <pre>s are used to format the description.
897                    $recap = (defined $recap ? "<em>" . CGI::escapeHTML($recap) . "</em><br /><br />" : "");
898                    my $description = "$recap$environment  $stackTrace";
899                    # Okay, we have all the pieces. Create a hash of the new event.
900                    my $newItem = { title => $title,
901                                    description => $description,
902                                    category => $LastCategory,
903                                    pubDate => $date,
904                                    guid => $guid,
905                                  };
906                    # We need XML capability for this.
907                    require XML::Simple;
908                    # The RSS document goes in here.
909                    my $rss;
910                    # Get the name of the RSS file. It's in the FIG temporary directory.
911                    my $fileName = "$FIG_Config::temp/$FIG_Config::error_feed";
912                    # Open the config file and lock it.
913                    $lock = Open(undef, "<$FIG_Config::fig_disk/config/FIG_Config.pm");
914                    flock $lock, LOCK_EX;
915                    # Does it exist?
916                    if (-s $fileName) {
917                        # Slurp it in.
918                        $rss = XML::Simple::XMLin($fileName, ForceArray => ['item']);
919                    } else {
920                        my $size = -s $fileName;
921                        # Create an empty channel.
922                        $rss = {
923                            channel => {
924                                title => 'NMPDR Warning Feed',
925                                link => "$FIG_Config::temp_url/$FIG_Config::error_feed",
926                                description => "Important messages regarding the status of the NMPDR.",
927                                generator => "NMPDR Trace Facility",
928                                docs => "http://blogs.law.harvard.edu/tech/rss",
929                                item => []
930                            },
931                        };
932                    }
933                    # Get the channel object.
934                    my $channel = $rss->{channel};
935                    # Update the last-build date.
936                    $channel->{lastBuildDate} = $date;
937                    # Get the item array.
938                    my $items = $channel->{item};
939                    # Insure it has only 100 entries.
940                    while (scalar @{$items} > 100) {
941                        pop @{$items};
942                    }
943                    # Add our new item at the front.
944                    unshift @{$items}, $newItem;
945                    # Create the XML. Note we do not include the root or the declaration. XML Simple can't handle
946                    # the requirements for those.
947                    my $xml = XML::Simple::XMLout($channel, NoAttr => 1, RootName => 'channel', XmlDecl => '');
948                    # Here we put in the root and declaration. The problem is that the root has to have the version attribute
949                    # in it. So, we suppress the root and do it by hand, and that requires suppressing the declaration, too.
950                    $xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<rss version=\"2.0\">$xml\n</rss>";
951                    # We don't use Open here because we can't afford an error.
952                    if (open XMLOUT, ">$fileName") {
953                        print XMLOUT $xml;
954                        close XMLOUT;
955                    }
956                }
957            }
958        };
959        if ($@) {
960            # If the feed failed, we need to know why. The error will be traced, but this method will not be involved
961            # (which is a good thing).
962            my $error = $@;
963            Trace("Feed Error: $error") if T(Feed => 0);
964        }
965        # Be sure to unlock.
966        if ($lock) {
967            flock $lock, LOCK_UN;
968            undef $lock;
969        }
970        # Restore the error message.
971        $@ = $savedError;
972    }
973    
974    
975    
976    
977  =head3 Assert  =head3 Assert
978    
979      Assert($condition1, $condition2, ... $conditionN);      Assert($condition1, $condition2, ... $conditionN);
# Line 704  Line 1024 
1024      my ($message) = @_;      my ($message) = @_;
1025      # Trace what's happening.      # Trace what's happening.
1026      Trace("Stack trace for event: $message");      Trace("Stack trace for event: $message");
1027      my $confession = longmess($message);      # Get the stack trace.
1028      # Convert the confession to a series of trace messages.      my @trace = LongMess();
1029      for my $line (split /\s*\n/, $confession) {      # Convert the trace to a series of messages.
1030          # Only proceed if this call trace is for a method outside Tracer itself.      for my $line (@trace) {
1031          if ($line !~ /Tracer\.pm/) {          # Replace the tab at the beginning with spaces.
1032              # Replace the leading tab with a series of spaces.          $line =~ s/^\t/    /;
             $line =~ s/\t/    /;  
1033              # Trace the line.              # Trace the line.
1034              Trace($line);              Trace($line);
1035          }          }
1036        # Issue a warning. This displays the event message and inserts it into the RSS error feed.
1037        Warn($message);
1038      }      }
 }  
   
 =head3 ScriptSetup (deprecated)  
   
     my ($cgi, $varHash) = ScriptSetup($noTrace);  
   
 Perform standard tracing and debugging setup for scripts. The value returned is  
 the CGI object followed by a pre-built variable hash. At the end of the script,  
 the client should call L</ScriptFinish> to output the web page.  
   
 This method calls L</ETracing> to configure tracing, which allows the tracing  
 to be configured via the emergency tracing form on the debugging control panel.  
 Tracing will then be turned on automatically for all programs that use the L</ETracing>  
 method, which includes every program that uses this method or L</StandardSetup>.  
   
 =over 4  
   
 =item noTrace (optional)  
   
 If specified, tracing will be suppressed. This is useful if the script wants to set up  
 tracing manually.  
1039    
1040  =item RETURN  =head3 LongMess
1041    
1042  Returns a two-element list consisting of a CGI query object and a variable hash for      my @lines = Tracer::LongMess();
 the output page.  
1043    
1044  =back  Return a stack trace with all tracing methods removed. The return will be in the form of a list
1045    of message strings.
1046    
1047  =cut  =cut
1048    
1049  sub ScriptSetup {  sub LongMess {
1050      # Get the parameters.      # Declare the return variable.
1051      my ($noTrace) = @_;      my @retVal = ();
1052      # Get the CGI query object.      my $confession = longmess("");
1053      my $cgi = CGI->new();      for my $line (split /\s*\n/, $confession) {
1054      # Set up tracing if it's not suppressed.          unless ($line =~ /Tracer\.pm/) {
1055      ETracing($cgi) unless $noTrace;              # Here we have a line worth keeping. Push it onto the result list.
1056      # Create the variable hash.              push @retVal, $line;
1057      my $varHash = { results => '' };          }
1058      # Return the query object and variable hash.      }
1059      return ($cgi, $varHash);      # Return the result.
1060        return @retVal;
1061  }  }
1062    
1063  =head3 ETracing  =head3 ETracing
1064    
1065      ETracing($parameter);      ETracing($parameter, %options);
1066    
1067  Set up emergency tracing. Emergency tracing is tracing that is turned  Set up emergency tracing. Emergency tracing is tracing that is turned
1068  on automatically for any program that calls this method. The emergency  on automatically for any program that calls this method. The emergency
# Line 782  Line 1083 
1083  is a CGI object and emergency tracing is not on, the C<Trace> and  is a CGI object and emergency tracing is not on, the C<Trace> and
1084  C<TF> parameters will be used to determine the type of tracing.  C<TF> parameters will be used to determine the type of tracing.
1085    
1086    =item options
1087    
1088    Hash of options. The permissible options are given below.
1089    
1090    =over 8
1091    
1092    =item destType
1093    
1094    Emergency tracing destination type to use if no tracing file is found. The
1095    default is C<WARN>.
1096    
1097    =item noParms
1098    
1099    If TRUE, then display of the saved CGI parms is suppressed. The default is FALSE.
1100    
1101    =item level
1102    
1103    The trace level to use if no tracing file is found. The default is C<0>.
1104    
1105  =back  =back
1106    
1107  =cut  =cut
1108    
1109  sub ETracing {  sub ETracing {
1110      # Get the parameter.      # Get the parameter.
1111      my ($parameter) = @_;      my ($parameter, %options) = @_;
1112      # Check for CGI mode.      # Check for CGI mode.
1113      my $cgi = (ref $parameter eq 'CGI' ? $parameter : undef);      if (defined $parameter && ref $parameter eq 'CGI') {
1114      # Default to no tracing except errors.          $SavedCGI = $parameter;
1115      my ($tracing, $dest) = ("0", "WARN");      } else {
1116            $SavedCGI = undef;
1117        }
1118        # Check for the noParms option.
1119        my $noParms = $options{noParms} || 0;
1120        # Get the default tracing information.
1121        my $tracing = $options{level} || 0;
1122        my $dest = $options{destType} || "WARN";
1123      # Check for emergency tracing.      # Check for emergency tracing.
1124      my $tkey = EmergencyKey($parameter);      my $tkey = EmergencyKey($parameter);
1125      my $emergencyFile = EmergencyFileName($tkey);      my $emergencyFile = EmergencyFileName($tkey);
# Line 814  Line 1141 
1141              # the trace level;              # the trace level;
1142              $dest = shift @tracing;              $dest = shift @tracing;
1143              my $level = shift @tracing;              my $level = shift @tracing;
             # Convert the destination to a real tracing destination.  
             # temp directory.  
             $dest = EmergencyTracingDest($tkey, $dest);  
1144              # Insure Tracer is specified.              # Insure Tracer is specified.
1145              my %moduleHash = map { $_ => 1 } @tracing;              my %moduleHash = map { $_ => 1 } @tracing;
1146              $moduleHash{Tracer} = 1;              $moduleHash{Tracer} = 1;
1147              # Set the trace parameter.              # Set the trace parameter.
1148              $tracing = join(" ", $level, sort keys %moduleHash);              $tracing = join(" ", $level, sort keys %moduleHash);
1149          }          }
     } elsif (defined $cgi) {  
         # There's no emergency tracing, but we have a CGI object, so check  
         # for tracing from the form parameters.  
         if ($cgi->param('Trace')) {  
             # Here the user has requested tracing via a form.  
             $dest = ($cgi->param('TF') ? ">$FIG_Config::temp/Trace$$.log" : "QUEUE");  
             $tracing = $cgi->param('Trace') . " Tracer";  
         }  
1150      }      }
1151        # Convert the destination to a real tracing destination.
1152        $dest = EmergencyTracingDest($tkey, $dest);
1153      # Setup the tracing we've determined from all the stuff above.      # Setup the tracing we've determined from all the stuff above.
1154      TSetup($tracing, $dest);      TSetup($tracing, $dest);
1155      # Check to see if we're a web script.      # Check to see if we're a web script.
1156      if (defined $cgi) {      if (defined $SavedCGI) {
1157          # Yes we are. Trace the form and environment data.          # Yes we are. Trace the form and environment data if it's not suppressed.
1158          TraceParms($cgi);          if (! $noParms) {
1159                TraceParms($SavedCGI);
1160            }
1161          # Check for RAW mode. In raw mode, we print a fake header so that we see everything          # Check for RAW mode. In raw mode, we print a fake header so that we see everything
1162          # emitted by the script in its raw form.          # emitted by the script in its raw form.
1163          if (T(Raw => 3)) {          if (T(Raw => 3)) {
# Line 1028  Line 1348 
1348      # Declare the return variable.      # Declare the return variable.
1349      my $retVal;      my $retVal;
1350      # Determine the parameter type.      # Determine the parameter type.
1351      if (! defined $parameter) {      if (! defined $parameter || defined($ENV{TRACING})) {
1352          # Here we're supposed to check the environment.          # Here we're supposed to check the environment. If that fails, we
1353          $retVal = $ENV{TRACING};          # get the effective login ID.
1354            $retVal = $ENV{TRACING} || scalar getpwuid($<);
1355      } else {      } else {
1356          my $ptype = ref $parameter;          my $ptype = ref $parameter;
1357          if ($ptype eq 'CGI') {          if ($ptype eq 'CGI') {
# Line 1071  Line 1392 
1392      # Get the parameters.      # Get the parameters.
1393      my ($cgi) = @_;      my ($cgi) = @_;
1394      if (T(CGI => 2)) {      if (T(CGI => 2)) {
1395          # Here we trace the GET-style URL for the script.          # Here we trace the GET-style URL for the script, but only if it's
1396          Trace("[URL] " . $cgi->url(-relative => 1, -query => 1));          # relatively small.
1397            my $url = $cgi->url(-relative => 1, -query => 1);
1398            my $len = length($url);
1399            if ($len < 500) {
1400                Trace("[URL] $url");
1401            } elsif ($len > 2048) {
1402                Trace("[URL] URL is too long to use with GET ($len characters).");
1403            } else {
1404                Trace("[URL] URL length is $len characters.");
1405            }
1406      }      }
1407      if (T(CGI => 3)) {      if (T(CGI => 3)) {
1408          # Here we want to trace the parameter data.          # Here we want to trace the parameter data.
# Line 1147  Line 1477 
1477      }      }
1478  }  }
1479    
1480    =head2 Command-Line Utility Methods
1481    
1482  =head3 ScriptFinish (deprecated)  =head3 SendSMS
   
     ScriptFinish($webData, $varHash);  
1483    
1484  Output a web page at the end of a script. Either the string to be output or the      my $msgID = Tracer::SendSMS($phoneNumber, $msg);
 name of a template file can be specified. If the second parameter is omitted,  
 it is assumed we have a string to be output; otherwise, it is assumed we have the  
 name of a template file. The template should have the variable C<DebugData>  
 specified in any form that invokes a standard script. If debugging mode is turned  
 on, a form field will be put in that allows the user to enter tracing data.  
 Trace messages will be placed immediately before the terminal C<BODY> tag in  
 the output, formatted as a list.  
1485    
1486  A typical standard script would loook like the following.  Send a text message to a phone number using Clickatell. The FIG_Config file must contain the
1487    user name, password, and API ID for the relevant account in the hash reference variable
1488    I<$FIG_Config::phone>, using the keys C<user>, C<password>, and C<api_id>. For
1489    example, if the user name is C<BruceTheHumanPet>, the password is C<silly>, and the API ID
1490    is C<2561022>, then the FIG_Config file must contain
1491    
1492      BEGIN {      $phone =  { user => 'BruceTheHumanPet',
1493          # Print the HTML header.                  password => 'silly',
1494          print "CONTENT-TYPE: text/html\n\n";                  api_id => '2561022' };
     }  
     use Tracer;  
     use CGI;  
     use FIG;  
     # ... more uses ...  
1495    
1496      my ($cgi, $varHash) = ScriptSetup();  The original purpose of this method was to insure Bruce would be notified immediately when the
1497      eval {  Sprout Load terminates. Care should be taken if you do not wish Bruce to be notified immediately
1498          # ... get data from $cgi, put it in $varHash ...  when you call this method.
     };  
     if ($@) {  
         Trace("Script Error: $@") if T(0);  
     }  
     ScriptFinish("Html/MyTemplate.html", $varHash);  
1499    
1500  The idea here is that even if the script fails, you'll see trace messages and  The message ID will be returned if successful, and C<undef> if an error occurs.
 useful output.  
1501    
1502  =over 4  =over 4
1503    
1504  =item webData  =item phoneNumber
1505    
1506  A string containing either the full web page to be written to the output or the  Phone number to receive the message, in international format. A United States phone number
1507  name of a template file from which the page is to be constructed. If the name  would be prefixed by "1". A British phone number would be prefixed by "44".
 of a template file is specified, then the second parameter must be present;  
 otherwise, it must be absent.  
1508    
1509  =item varHash (optional)  =item msg
1510    
1511  If specified, then a reference to a hash mapping variable names for a template  Message to send to the specified phone.
1512  to their values. The template file will be read into memory, and variable markers  
1513  will be replaced by data in this hash reference.  =item RETURN
1514    
1515    Returns the message ID if successful, and C<undef> if the message could not be sent.
1516    
1517  =back  =back
1518    
1519  =cut  =cut
1520    
1521  sub ScriptFinish {  sub SendSMS {
1522      # Get the parameters.      # Get the parameters.
1523      my ($webData, $varHash) = @_;      my ($phoneNumber, $msg) = @_;
1524      # Check for a template file situation.      # Declare the return variable. If we do not change it, C<undef> will be returned.
1525      my $outputString;      my $retVal;
1526      if (defined $varHash) {      # Only proceed if we have phone support.
1527          # Here we have a template file. We need to determine the template type.      if (! defined $FIG_Config::phone) {
1528          my $template;          Trace("Phone support not present in FIG_Config.") if T(1);
         if ($FIG_Config::template_url && $webData =~ /\.php$/) {  
             $template = "$FIG_Config::template_url/$webData";  
         } else {  
             $template = "<<$webData";  
         }  
         $outputString = PageBuilder::Build($template, $varHash, "Html");  
     } else {  
         # Here the user gave us a raw string.  
         $outputString = $webData;  
     }  
     # Check for trace messages.  
     if ($Destination ne "NONE" && $TraceLevel > 0) {  
         # We have trace messages, so we want to put them at the end of the body. This  
         # is either at the end of the whole string or at the beginning of the BODY  
         # end-tag.  
         my $pos = length $outputString;  
         if ($outputString =~ m#</body>#gi) {  
             $pos = (pos $outputString) - 7;  
         }  
         # If the trace messages were queued, we unroll them. Otherwise, we display the  
         # destination.  
         my $traceHtml;  
         if ($Destination eq "QUEUE") {  
             $traceHtml = QTrace('Html');  
         } elsif ($Destination =~ /^>>(.+)$/) {  
             # Here the tracing output it to a file. We code it as a hyperlink so the user  
             # can copy the file name into the clipboard easily.  
             my $actualDest = $1;  
             $traceHtml = "<p>Tracing output to $actualDest.</p>\n";  
         } else {  
             # Here we have one of the special destinations.  
             $traceHtml = "<P>Tracing output type is $Destination.</p>\n";  
         }  
         substr $outputString, $pos, 0, $traceHtml;  
     }  
     # Write the output string.  
     print $outputString;  
 }  
   
 =head2 Command-Line Utility Methods  
   
 =head3 SendSMS  
   
     my $msgID = Tracer::SendSMS($phoneNumber, $msg);  
   
 Send a text message to a phone number using Clickatell. The FIG_Config file must contain the  
 user name, password, and API ID for the relevant account in the hash reference variable  
 I<$FIG_Config::phone>, using the keys C<user>, C<password>, and C<api_id>. For  
 example, if the user name is C<BruceTheHumanPet>, the password is C<silly>, and the API ID  
 is C<2561022>, then the FIG_Config file must contain  
   
     $phone =  { user => 'BruceTheHumanPet',  
                 password => 'silly',  
                 api_id => '2561022' };  
   
 The original purpose of this method was to insure Bruce would be notified immediately when the  
 Sprout Load terminates. Care should be taken if you do not wish Bruce to be notified immediately  
 when you call this method.  
   
 The message ID will be returned if successful, and C<undef> if an error occurs.  
   
 =over 4  
   
 =item phoneNumber  
   
 Phone number to receive the message, in international format. A United States phone number  
 would be prefixed by "1". A British phone number would be prefixed by "44".  
   
 =item msg  
   
 Message to send to the specified phone.  
   
 =item RETURN  
   
 Returns the message ID if successful, and C<undef> if the message could not be sent.  
   
 =back  
   
 =cut  
   
 sub SendSMS {  
     # Get the parameters.  
     my ($phoneNumber, $msg) = @_;  
     # Declare the return variable. If we do not change it, C<undef> will be returned.  
     my $retVal;  
     # Only proceed if we have phone support.  
     if (! defined $FIG_Config::phone) {  
         Trace("Phone support not present in FIG_Config.") if T(1);  
1529      } else {      } else {
1530          # Get the phone data.          # Get the phone data.
1531          my $parms = $FIG_Config::phone;          my $parms = $FIG_Config::phone;
# Line 1454  Line 1681 
1681  Specifying a value of C<E> for the trace level causes emergency tracing to  Specifying a value of C<E> for the trace level causes emergency tracing to
1682  be used instead of custom tracing. If the user name is not specified,  be used instead of custom tracing. If the user name is not specified,
1683  the tracing key is taken from the C<Tracing> environment variable. If there  the tracing key is taken from the C<Tracing> environment variable. If there
1684  is no value for that variable, the tracing key will be computed from the PID.  is no value for that variable, the tracing key will be computed from the active
1685    login ID.
1686    
1687    Since the default situation in StandardSetup is to trace to the standard
1688    output, errors that occur in command-line scripts will not generate
1689    RSS events. To force the events, use the C<warn> option.
1690    
1691        TransactFeatures -background -warn register ../xacts IDs.tbl
1692    
1693  Finally, if the special option C<-help> is specified, the option  Finally, if the special option C<-help> is specified, the option
1694  names will be traced at level 0 and the program will exit without processing.  names will be traced at level 0 and the program will exit without processing.
# Line 1471  Line 1705 
1705          -noAlias  do not expect aliases in CHANGE transactions          -noAlias  do not expect aliases in CHANGE transactions
1706          -start    start with this genome          -start    start with this genome
1707          -tblFiles output TBL files containing the corrected IDs          -tblFiles output TBL files containing the corrected IDs
1708            -forked   do not erase the trace file before tracing
1709    
1710  The caller has the option of modifying the tracing scheme by placing a value  The caller has the option of modifying the tracing scheme by placing a value
1711  for C<trace> in the incoming options hash. The default value can be overridden,  for C<trace> in the incoming options hash. The default value can be overridden,
# Line 1534  Line 1769 
1769      my ($categories, $options, $parmHelp, @argv) = @_;      my ($categories, $options, $parmHelp, @argv) = @_;
1770      # Get the default tracing key.      # Get the default tracing key.
1771      my $tkey = EmergencyKey();      my $tkey = EmergencyKey();
1772        # Save the command line.
1773        $CommandLine = join(" ", $0, map { $_ =~ /\s/ ? "\"$_\"" : $_ } @argv);
1774      # Add the tracing options.      # Add the tracing options.
1775      if (! exists $options->{trace}) {      if (! exists $options->{trace}) {
1776          $options->{trace} = ['2', "tracing level (E for emergency tracing)"];          $options->{trace} = ['2', "tracing level (E for emergency tracing)"];
1777      }      }
1778        if (! exists $options->{forked}) {
1779            $options->{forked} = [0, "keep old trace file"];
1780        }
1781      $options->{sql} = [0, "turn on SQL tracing"];      $options->{sql} = [0, "turn on SQL tracing"];
1782      $options->{help} = [0, "display command-line options"];      $options->{help} = [0, "display command-line options"];
1783      $options->{user} = [$tkey, "tracing key"];      $options->{user} = [$tkey, "tracing key"];
1784      $options->{background} = [0, "spool standard and error output"];      $options->{background} = [0, "spool standard and error output"];
1785        $options->{warn} = [0, "send errors to RSS feed"];
1786        $options->{moreTracing} = ["", "comma-delimited list of additional trace modules for debugging"];
1787      # Create a parsing hash from the options hash. The parsing hash      # Create a parsing hash from the options hash. The parsing hash
1788      # contains the default values rather than the default value      # contains the default values rather than the default value
1789      # and the description. While we're at it, we'll memorize the      # and the description. While we're at it, we'll memorize the
# Line 1558  Line 1800 
1800      my ($retOptions, @retParameters) = ParseCommand(\%parseOptions, @argv);      my ($retOptions, @retParameters) = ParseCommand(\%parseOptions, @argv);
1801      # Get the logfile suffix.      # Get the logfile suffix.
1802      my $suffix = $retOptions->{user};      my $suffix = $retOptions->{user};
1803      # Check for background mode.      # We'll put the trace file name in here. We need it later if background
1804      if ($retOptions->{background}) {      # mode is on.
1805          my $outFileName = "$FIG_Config::temp/out$suffix.log";      my $traceFileName;
         my $errFileName = "$FIG_Config::temp/err$suffix.log";  
         open STDOUT, ">$outFileName";  
         open STDERR, ">$errFileName";  
         # Check for phone support. If we have phone support and a phone number,  
         # we want to turn it on.  
         if ($ENV{PHONE} && defined($FIG_Config::phone)) {  
             $retOptions->{phone} = $ENV{PHONE};  
         }  
     }  
1806      # Now we want to set up tracing. First, we need to know if the user      # Now we want to set up tracing. First, we need to know if the user
1807      # wants emergency tracing.      # wants emergency tracing.
1808      if ($retOptions->{trace} eq 'E') {      if ($retOptions->{trace} eq 'E') {
# Line 1580  Line 1813 
1813          if ($retOptions->{sql}) {          if ($retOptions->{sql}) {
1814              push @cats, "SQL";              push @cats, "SQL";
1815          }          }
1816            if ($retOptions->{warn}) {
1817                push @cats, "Feed";
1818            }
1819          # Add the default categories.          # Add the default categories.
1820          push @cats, "Tracer";          push @cats, "Tracer";
1821            # Check for more tracing groups.
1822            if ($retOptions->{moreTracing}) {
1823                push @cats, split /,/, $retOptions->{moreTracing};
1824            }
1825          # Next, we create the category string by joining the categories.          # Next, we create the category string by joining the categories.
1826          my $cats = join(" ", @cats);          my $cats = join(" ", @cats);
1827          # Check to determine whether or not the caller wants to turn off tracing          # Check to determine whether or not the caller wants to turn off tracing
# Line 1596  Line 1836 
1836          my $traceMode;          my $traceMode;
1837          # Verify that we can open a file in the FIG temporary directory.          # Verify that we can open a file in the FIG temporary directory.
1838          my $traceFileName = "$FIG_Config::temp/trace$suffix.log";          my $traceFileName = "$FIG_Config::temp/trace$suffix.log";
1839          if (open TESTTRACE, ">$traceFileName") {          my $traceFileSpec = ($retOptions->{forked} ? ">>$traceFileName" : ">$traceFileName");
1840            if (open TESTTRACE, "$traceFileSpec") {
1841              # Here we can trace to a file.              # Here we can trace to a file.
1842              $traceMode = ">$traceFileName";              $traceMode = ">>$traceFileName";
1843              if ($textOKFlag) {              if ($textOKFlag) {
1844                  # Echo to standard output if the text-OK flag is set.                  # Echo to standard output if the text-OK flag is set.
1845                  $traceMode = "+$traceMode";                  $traceMode = "+$traceMode";
# Line 1619  Line 1860 
1860          # Now set up the tracing.          # Now set up the tracing.
1861          TSetup("$traceLevel $cats", $traceMode);          TSetup("$traceLevel $cats", $traceMode);
1862      }      }
1863        # Check for background mode.
1864        if ($retOptions->{background}) {
1865            my $outFileName = "$FIG_Config::temp/out$suffix$$.log";
1866            my $errFileName = "$FIG_Config::temp/err$suffix$$.log";
1867            # Spool the output.
1868            open STDOUT, ">$outFileName";
1869            # If we have a trace file, trace the errors to the log. Otherwise,
1870            # spool the errors.
1871            if (defined $traceFileName) {
1872                open STDERR, "| Tracer $traceFileName";
1873            } else {
1874                open STDERR, ">$errFileName";
1875            }
1876            # Check for phone support. If we have phone support and a phone number,
1877            # we want to turn it on.
1878            if ($ENV{PHONE} && defined($FIG_Config::phone)) {
1879                $retOptions->{phone} = $ENV{PHONE};
1880            }
1881        }
1882      # Check for the "help" option. If it is specified, dump the command-line      # Check for the "help" option. If it is specified, dump the command-line
1883      # options and exit the program.      # options and exit the program.
1884      if ($retOptions->{help}) {      if ($retOptions->{help}) {
# Line 1799  Line 2059 
2059      }      }
2060  }  }
2061    
2062    =head3 UnparseOptions
2063    
2064        my $optionString = Tracer::UnparseOptions(\%options);
2065    
2066    Convert an option hash into a command-line string. This will not
2067    necessarily be the same text that came in, but it will nonetheless
2068    produce the same ultimate result when parsed by L</StandardSetup>.
2069    
2070    =over 4
2071    
2072    =item options
2073    
2074    Reference to a hash of options to convert into an option string.
2075    
2076    =item RETURN
2077    
2078    Returns a string that will parse to the same set of options when
2079    parsed by L</StandardSetup>.
2080    
2081    =back
2082    
2083    =cut
2084    
2085    sub UnparseOptions {
2086        # Get the parameters.
2087        my ($options) = @_;
2088        # The option segments will be put in here.
2089        my @retVal = ();
2090        # Loop through the options.
2091        for my $key (keys %$options) {
2092            # Get the option value.
2093            my $value = $options->{$key};
2094            # Only use it if it's nonempty.
2095            if (defined $value && $value ne "") {
2096                my $segment = "--$key=$value";
2097                # Quote it if necessary.
2098                if ($segment =~ /[ |<>*]/) {
2099                    $segment = '"' . $segment . '"';
2100                }
2101                # Add it to the return list.
2102                push @retVal, $segment;
2103            }
2104        }
2105        # Return the result.
2106        return join(" ", @retVal);
2107    }
2108    
2109  =head3 ParseCommand  =head3 ParseCommand
2110    
2111      my ($options, @arguments) = Tracer::ParseCommand(\%optionTable, @inputList);      my ($options, @arguments) = Tracer::ParseCommand(\%optionTable, @inputList);
# Line 2271  Line 2578 
2578          } else {          } else {
2579              @retVal = readdir $dirHandle;              @retVal = readdir $dirHandle;
2580          }          }
2581            closedir $dirHandle;
2582      } elsif (! $flag) {      } elsif (! $flag) {
2583          # Here the directory would not open and it's considered an error.          # Here the directory would not open and it's considered an error.
2584          Confess("Could not open directory $dirName.");          Confess("Could not open directory $dirName.");
# Line 2377  Line 2685 
2685  Map of search patterns to permission masks. If a directory name matches  Map of search patterns to permission masks. If a directory name matches
2686  one of the patterns, that directory and all its members and subdirectories  one of the patterns, that directory and all its members and subdirectories
2687  will be assigned the new pattern. For example, the following would  will be assigned the new pattern. For example, the following would
2688  assign 01664 to most files, but would use 01777 for directories named C<tmp>.  assign 0664 to most files, but would use 0777 for directories named C<tmp>.
2689    
2690      Tracer::SetPermissions($dirName, 'fig', 01664, '^tmp$' => 01777);      Tracer::SetPermissions($dirName, 'fig', 01664, '^tmp$' => 01777);
2691    
# Line 2430  Line 2738 
2738                      $match = 1;                      $match = 1;
2739                  }                  }
2740              }              }
2741              # Check for a match. Note we use $i-1 because the loop added 2              # Find out if we have a match. Note we use $i-1 because the loop added 2
2742              # before terminating due to the match.              # before terminating due to the match.
2743              if ($match && $otherMasks[$i-1] != $mask) {              if ($match && $otherMasks[$i-1] != $mask) {
2744                  # This directory matches one of the incoming patterns, and it's                  # This directory matches one of the incoming patterns, and it's
# Line 2598  Line 2906 
2906    
2907  =head2 Other Useful Methods  =head2 Other Useful Methods
2908    
2909    =head3 IDHASH
2910    
2911        my $hash = SHTargetSearch::IDHASH(@keys);
2912    
2913    This is a dinky little method that converts a list of values to a reference
2914    to hash of values to labels. The values and labels are the same.
2915    
2916    =cut
2917    
2918    sub IDHASH {
2919        my %retVal = map { $_ => $_ } @_;
2920        return \%retVal;
2921    }
2922    
2923    =head3 Pluralize
2924    
2925        my $plural = Tracer::Pluralize($word);
2926    
2927    This is a very simple pluralization utility. It adds an C<s> at the end
2928    of the input word unless it already ends in an C<s>, in which case it
2929    adds C<es>.
2930    
2931    =over 4
2932    
2933    =item word
2934    
2935    Singular word to pluralize.
2936    
2937    =item RETURN
2938    
2939    Returns the probable plural form of the word.
2940    
2941    =back
2942    
2943    =cut
2944    
2945    sub Pluralize {
2946        # Get the parameters.
2947        my ($word) = @_;
2948        # Declare the return variable.
2949        my $retVal;
2950        if ($word =~ /s$/) {
2951            $retVal = $word . 'es';
2952        } else {
2953            $retVal = $word . 's';
2954        }
2955        # Return the result.
2956        return $retVal;
2957    }
2958    
2959    =head3 Numeric
2960    
2961        my $okFlag = Tracer::Numeric($string);
2962    
2963    Return the value of the specified string if it is numeric, or an undefined value
2964    if it is not numeric.
2965    
2966    =over 4
2967    
2968    =item string
2969    
2970    String to check.
2971    
2972    =item RETURN
2973    
2974    Returns the numeric value of the string if successful, or C<undef> if the string
2975    is not numeric.
2976    
2977    =back
2978    
2979    =cut
2980    
2981    sub Numeric {
2982        # Get the parameters.
2983        my ($string) = @_;
2984        # We'll put the value in here if we succeed.
2985        my $retVal;
2986        # Get a working copy of the string.
2987        my $copy = $string;
2988        # Trim leading and trailing spaces.
2989        $copy =~ s/^\s+//;
2990        $copy =~ s/\s+$//;
2991        # Check the result.
2992        if ($copy =~ /^[+-]?\d+$/) {
2993            $retVal = $copy;
2994        } elsif ($copy =~ /^([+-]\d+|\d*)[eE][+-]?\d+$/) {
2995            $retVal = $copy;
2996        } elsif ($copy =~ /^([+-]\d+|\d*)\.\d*([eE][+-]?\d+)?$/) {
2997            $retVal = $copy;
2998        }
2999        # Return the result.
3000        return $retVal;
3001    }
3002    
3003    
3004  =head3 ParseParm  =head3 ParseParm
3005    
3006      my $listValue = Tracer::ParseParm($string);      my $listValue = Tracer::ParseParm($string);
# Line 2840  Line 3243 
3243      return $retVal;      return $retVal;
3244  }  }
3245    
3246    =head3 In
3247    
3248        my $flag = Tracer::In($value, $min, $max);
3249    
3250    Return TRUE if the value is between the minimum and the maximum, else FALSE.
3251    
3252    =cut
3253    
3254    sub In {
3255        return ($_[0] <= $_[2] && $_[0] >= $_[1]);
3256    }
3257    
3258    
3259  =head3 Constrain  =head3 Constrain
3260    
3261      my $constrained = Constrain($value, $min, $max);      my $constrained = Constrain($value, $min, $max);
# Line 2951  Line 3367 
3367      return $retVal;      return $retVal;
3368  }  }
3369    
   
3370  =head3 Strip  =head3 Strip
3371    
3372      my $string = Tracer::Strip($line);      my $string = Tracer::Strip($line);
# Line 2984  Line 3399 
3399      return $retVal;      return $retVal;
3400  }  }
3401    
3402    =head3 Trim
3403    
3404        my $string = Tracer::Trim($line);
3405    
3406    Trim all spaces from the beginning and ending of a string.
3407    
3408    =over 4
3409    
3410    =item line
3411    
3412    Line of text to be trimmed.
3413    
3414    =item RETURN
3415    
3416    The same line of text with all whitespace chopped off either end.
3417    
3418    =back
3419    
3420    =cut
3421    
3422    sub Trim {
3423        # Get a copy of the parameter string.
3424        my ($string) = @_;
3425        my $retVal = (defined $string ? $string : "");
3426        # Strip the front spaces.
3427        $retVal =~ s/^\s+//;
3428        # Strip the back spaces.
3429        $retVal =~ s/\s+$//;
3430        # Return the result.
3431        return $retVal;
3432    }
3433    
3434  =head3 Pad  =head3 Pad
3435    
3436      my $paddedString = Tracer::Pad($string, $len, $left, $padChar);      my $paddedString = Tracer::Pad($string, $len, $left, $padChar);
# Line 3045  Line 3492 
3492      return $retVal;      return $retVal;
3493  }  }
3494    
3495    =head3 Quoted
3496    
3497        my $string = Tracer::Quoted($var);
3498    
3499    Convert the specified value to a string and enclose it in single quotes.
3500    If it's undefined, the string C<undef> in angle brackets will be used
3501    instead.
3502    
3503    =over 4
3504    
3505    =item var
3506    
3507    Value to quote.
3508    
3509    =item RETURN
3510    
3511    Returns a string enclosed in quotes, or an indication the value is undefined.
3512    
3513    =back
3514    
3515    =cut
3516    
3517    sub Quoted {
3518        # Get the parameters.
3519        my ($var) = @_;
3520        # Declare the return variable.
3521        my $retVal;
3522        # Are we undefined?
3523        if (! defined $var) {
3524            $retVal = "<undef>";
3525        } else {
3526            # No, so convert to a string and enclose in quotes.
3527            $retVal = $var;
3528            $retVal =~ s/'/\\'/;
3529            $retVal = "'$retVal'";
3530        }
3531        # Return the result.
3532        return $retVal;
3533    }
3534    
3535  =head3 EOF  =head3 EOF
3536    
3537  This is a constant that is lexically greater than any useful string.  This is a constant that is lexically greater than any useful string.
# Line 3134  Line 3621 
3621  }  }
3622    
3623    
3624    =head3 GetMemorySize
3625    
3626        my $string = Tracer::GetMemorySize();
3627    
3628    Return a memory size string for the current process. The string will be
3629    in comma format, with a size indicator (K, M, G) at the end.
3630    
3631    =cut
3632    
3633    sub GetMemorySize {
3634        # Get the memory size from Unix.
3635        my ($retVal) = `ps h -o vsz $$`;
3636        # Remove the ending new-line.
3637        chomp $retVal;
3638        # Format and return the result.
3639        return CommaFormat($retVal) . "K";
3640    }
3641    
3642  =head3 CompareLists  =head3 CompareLists
3643    
3644      my ($inserted, $deleted) = Tracer::CompareLists(\@newList, \@oldList, $keyIndex);      my ($inserted, $deleted) = Tracer::CompareLists(\@newList, \@oldList, $keyIndex);
# Line 3201  Line 3706 
3706      return ($inserted, $deleted);      return ($inserted, $deleted);
3707  }  }
3708    
3709  =head3 GenerateURL  =head3 Cmp
3710    
3711      my $queryUrl = Tracer::GenerateURL($page, %parameters);      my $cmp = Tracer::Cmp($a, $b);
3712    
3713  Generate a GET-style URL for the specified page with the specified parameter  This method performs a universal sort comparison. Each value coming in is
3714  names and values. The values will be URL-escaped automatically. So, for  separated into a text parts and number parts. The text
3715  example  part is string compared, and if both parts are equal, then the number
3716    parts are compared numerically. A stream of just numbers or a stream of
3717    just strings will sort correctly, and a mixed stream will sort with the
3718    numbers first. Strings with a label and a number will sort in the
3719    expected manner instead of lexically. Undefined values sort last.
3720    
3721    =over 4
3722    
3723    =item a
3724    
3725    First item to compare.
3726    
3727    =item b
3728    
3729    Second item to compare.
3730    
3731    =item RETURN
3732    
3733    Returns a negative number if the first item should sort first (is less), a positive
3734    number if the first item should sort second (is greater), and a zero if the items are
3735    equal.
3736    
3737    =back
3738    
3739    =cut
3740    
3741    sub Cmp {
3742        # Get the parameters.
3743        my ($a, $b) = @_;
3744        # Declare the return value.
3745        my $retVal;
3746        # Check for nulls.
3747        if (! defined($a)) {
3748            $retVal = (! defined($b) ? 0 : -1);
3749        } elsif (! defined($b)) {
3750            $retVal = 1;
3751        } else {
3752            # Here we have two real values. Parse the two strings.
3753            my @aParsed = _Parse($a);
3754            my @bParsed = _Parse($b);
3755            # Loop through the first string.
3756            while (! $retVal && @aParsed) {
3757                # Extract the string parts.
3758                my $aPiece = shift(@aParsed);
3759                my $bPiece = shift(@bParsed) || '';
3760                # Extract the number parts.
3761                my $aNum = shift(@aParsed);
3762                my $bNum = shift(@bParsed) || 0;
3763                # Compare the string parts insensitively.
3764                $retVal = (lc($aPiece) cmp lc($bPiece));
3765                # If they're equal, compare them sensitively.
3766                if (! $retVal) {
3767                    $retVal = ($aPiece cmp $bPiece);
3768                    # If they're STILL equal, compare the number parts.
3769                    if (! $retVal) {
3770                        $retVal = $aNum <=> $bNum;
3771                    }
3772                }
3773            }
3774        }
3775        # Return the result.
3776        return $retVal;
3777    }
3778    
3779    # This method parses an input string into a string parts alternating with
3780    # number parts.
3781    sub _Parse {
3782        # Get the incoming string.
3783        my ($string) = @_;
3784        # The pieces will be put in here.
3785        my @retVal;
3786        # Loop through as many alpha/num sets as we can.
3787        while ($string =~ /^(\D*)(\d+)(.*)/) {
3788            # Push the alpha and number parts into the return string.
3789            push @retVal, $1, $2;
3790            # Save the residual.
3791            $string = $3;
3792        }
3793        # If there's still stuff left, add it to the end with a trailing
3794        # zero.
3795        if ($string) {
3796            push @retVal, $string, 0;
3797        }
3798        # Return the list.
3799        return @retVal;
3800    }
3801    
3802    =head3 ListEQ
3803    
3804        my $flag = Tracer::ListEQ(\@a, \@b);
3805    
3806    Return TRUE if the specified lists contain the same strings in the same
3807    order, else FALSE.
3808    
3809    =over 4
3810    
3811    =item a
3812    
3813    Reference to the first list.
3814    
3815    =item b
3816    
3817    Reference to the second list.
3818    
3819    =item RETURN
3820    
3821    Returns TRUE if the two parameters are identical string lists, else FALSE.
3822    
3823    =back
3824    
3825    =cut
3826    
3827    sub ListEQ {
3828        # Get the parameters.
3829        my ($a, $b) = @_;
3830        # Declare the return variable. Start by checking the lengths.
3831        my $n = scalar(@$a);
3832        my $retVal = ($n == scalar(@$b));
3833        # Now compare the list elements.
3834        for (my $i = 0; $retVal && $i < $n; $i++) {
3835            $retVal = ($a->[$i] eq $b->[$i]);
3836        }
3837        # Return the result.
3838        return $retVal;
3839    }
3840    
3841    =head2 CGI Script Utilities
3842    
3843    =head3 ScriptSetup (deprecated)
3844    
3845        my ($cgi, $varHash) = ScriptSetup($noTrace);
3846    
3847    Perform standard tracing and debugging setup for scripts. The value returned is
3848    the CGI object followed by a pre-built variable hash. At the end of the script,
3849    the client should call L</ScriptFinish> to output the web page.
3850    
3851    This method calls L</ETracing> to configure tracing, which allows the tracing
3852    to be configured via the emergency tracing form on the debugging control panel.
3853    Tracing will then be turned on automatically for all programs that use the L</ETracing>
3854    method, which includes every program that uses this method or L</StandardSetup>.
3855    
3856    =over 4
3857    
3858    =item noTrace (optional)
3859    
3860    If specified, tracing will be suppressed. This is useful if the script wants to set up
3861    tracing manually.
3862    
3863    =item RETURN
3864    
3865    Returns a two-element list consisting of a CGI query object and a variable hash for
3866    the output page.
3867    
3868    =back
3869    
3870    =cut
3871    
3872    sub ScriptSetup {
3873        # Get the parameters.
3874        my ($noTrace) = @_;
3875        # Get the CGI query object.
3876        my $cgi = CGI->new();
3877        # Set up tracing if it's not suppressed.
3878        ETracing($cgi) unless $noTrace;
3879        # Create the variable hash.
3880        my $varHash = { results => '' };
3881        # Return the query object and variable hash.
3882        return ($cgi, $varHash);
3883    }
3884    
3885    =head3 ScriptFinish (deprecated)
3886    
3887        ScriptFinish($webData, $varHash);
3888    
3889    Output a web page at the end of a script. Either the string to be output or the
3890    name of a template file can be specified. If the second parameter is omitted,
3891    it is assumed we have a string to be output; otherwise, it is assumed we have the
3892    name of a template file. The template should have the variable C<DebugData>
3893    specified in any form that invokes a standard script. If debugging mode is turned
3894    on, a form field will be put in that allows the user to enter tracing data.
3895    Trace messages will be placed immediately before the terminal C<BODY> tag in
3896    the output, formatted as a list.
3897    
3898    A typical standard script would loook like the following.
3899    
3900        BEGIN {
3901            # Print the HTML header.
3902            print "CONTENT-TYPE: text/html\n\n";
3903        }
3904        use Tracer;
3905        use CGI;
3906        use FIG;
3907        # ... more uses ...
3908    
3909        my ($cgi, $varHash) = ScriptSetup();
3910        eval {
3911            # ... get data from $cgi, put it in $varHash ...
3912        };
3913        if ($@) {
3914            Trace("Script Error: $@") if T(0);
3915        }
3916        ScriptFinish("Html/MyTemplate.html", $varHash);
3917    
3918    The idea here is that even if the script fails, you'll see trace messages and
3919    useful output.
3920    
3921    =over 4
3922    
3923    =item webData
3924    
3925    A string containing either the full web page to be written to the output or the
3926    name of a template file from which the page is to be constructed. If the name
3927    of a template file is specified, then the second parameter must be present;
3928    otherwise, it must be absent.
3929    
3930    =item varHash (optional)
3931    
3932    If specified, then a reference to a hash mapping variable names for a template
3933    to their values. The template file will be read into memory, and variable markers
3934    will be replaced by data in this hash reference.
3935    
3936    =back
3937    
3938    =cut
3939    
3940    sub ScriptFinish {
3941        # Get the parameters.
3942        my ($webData, $varHash) = @_;
3943        # Check for a template file situation.
3944        my $outputString;
3945        if (defined $varHash) {
3946            # Here we have a template file. We need to determine the template type.
3947            my $template;
3948            if ($FIG_Config::template_url && $webData =~ /\.php$/) {
3949                $template = "$FIG_Config::template_url/$webData";
3950            } else {
3951                $template = "<<$webData";
3952            }
3953            $outputString = PageBuilder::Build($template, $varHash, "Html");
3954        } else {
3955            # Here the user gave us a raw string.
3956            $outputString = $webData;
3957        }
3958        # Check for trace messages.
3959        if ($Destination ne "NONE" && $TraceLevel > 0) {
3960            # We have trace messages, so we want to put them at the end of the body. This
3961            # is either at the end of the whole string or at the beginning of the BODY
3962            # end-tag.
3963            my $pos = length $outputString;
3964            if ($outputString =~ m#</body>#gi) {
3965                $pos = (pos $outputString) - 7;
3966            }
3967            # If the trace messages were queued, we unroll them. Otherwise, we display the
3968            # destination.
3969            my $traceHtml;
3970            if ($Destination eq "QUEUE") {
3971                $traceHtml = QTrace('Html');
3972            } elsif ($Destination =~ /^>>(.+)$/) {
3973                # Here the tracing output it to a file. We code it as a hyperlink so the user
3974                # can copy the file name into the clipboard easily.
3975                my $actualDest = $1;
3976                $traceHtml = "<p>Tracing output to $actualDest.</p>\n";
3977            } else {
3978                # Here we have one of the special destinations.
3979                $traceHtml = "<P>Tracing output type is $Destination.</p>\n";
3980            }
3981            substr $outputString, $pos, 0, $traceHtml;
3982        }
3983        # Write the output string.
3984        print $outputString;
3985    }
3986    
3987    =head3 GenerateURL
3988    
3989        my $queryUrl = Tracer::GenerateURL($page, %parameters);
3990    
3991    Generate a GET-style URL for the specified page with the specified parameter
3992    names and values. The values will be URL-escaped automatically. So, for
3993    example
3994    
3995      Tracer::GenerateURL("form.cgi", type => 1, string => "\"high pass\" or highway")      Tracer::GenerateURL("form.cgi", type => 1, string => "\"high pass\" or highway")
3996    
# Line 3335  Line 4118 
4118      return $retVal;      return $retVal;
4119  }  }
4120    
 =head3 Cmp  
   
     my $cmp = Tracer::Cmp($a, $b);  
   
 This method performs a universal sort comparison. Each value coming in is  
 separated into a leading text part and a trailing number part. The text  
 part is string compared, and if both parts are equal, then the number  
 parts are compared numerically. A stream of just numbers or a stream of  
 just strings will sort correctly, and a mixed stream will sort with the  
 numbers first. Strings with a label and a number will sort in the  
 expected manner instead of lexically.  
   
 =over 4  
   
 =item a  
   
 First item to compare.  
   
 =item b  
   
 Second item to compare.  
   
 =item RETURN  
   
 Returns a negative number if the first item should sort first (is less), a positive  
 number if the first item should sort second (is greater), and a zero if the items are  
 equal.  
   
 =back  
   
 =cut  
   
 sub Cmp {  
     # Get the parameters.  
     my ($a, $b) = @_;  
     # Declare the return value.  
     my $retVal;  
     # Check for nulls.  
     if (! defined($a)) {  
         $retVal = (! defined($b) ? 0 : -1);  
     } elsif (! defined($b)) {  
         $retVal = 1;  
     } else {  
         # Here we have two real values. Parse the two strings.  
         $a =~ /^(\D*)(\d*)$/;  
         my $aParsed = [$1, $2];  
         $b =~ /^(\D*)(\d*)$/;  
         my $bParsed = [$1, $2];  
         # Compare the string parts.  
         $retVal = $aParsed->[0] cmp $bParsed->[0];  
         if (! $retVal) {  
             $retVal = $aParsed->[1] <=> $bParsed->[1];  
         }  
     }  
     # Return the result.  
     return $retVal;  
 }  
   
   
4121  =head3 TrackingCode  =head3 TrackingCode
4122    
4123      my $html = Tracer::TrackingCode();      my $html = Tracer::TrackingCode();
# Line 3424  Line 4148 
4148      return $retVal;      return $retVal;
4149  }  }
4150    
4151    =head3 Clean
4152    
4153        my $cleaned = Tracer::Clean($string);
4154    
4155    Clean up a string for HTML display. This not only converts special
4156    characters to HTML entity names, it also removes control characters.
4157    
4158    =over 4
4159    
4160    =item string
4161    
4162    String to convert.
4163    
4164    =item RETURN
4165    
4166    Returns the input string with anything that might disrupt an HTML literal removed. An
4167    undefined value will be converted to an empty string.
4168    
4169    =back
4170    
4171    =cut
4172    
4173    sub Clean {
4174        # Get the parameters.
4175        my ($string) = @_;
4176        # Declare the return variable.
4177        my $retVal = "";
4178        # Only proceed if the value exists.
4179        if (defined $string) {
4180            # Get the string.
4181            $retVal = $string;
4182            # Clean the control characters.
4183            $retVal =~ tr/\x00-\x1F/?/;
4184            # Escape the rest.
4185            $retVal = CGI::escapeHTML($retVal);
4186        }
4187        # Return the result.
4188        return $retVal;
4189    }
4190    
4191    =head3 SortByValue
4192    
4193        my @keys = Tracer::SortByValue(\%hash);
4194    
4195    Get a list of hash table keys sorted by hash table values.
4196    
4197    =over 4
4198    
4199    =item hash
4200    
4201    Hash reference whose keys are to be extracted.
4202    
4203    =item RETURN
4204    
4205    Returns a list of the hash keys, ordered so that the corresponding hash values
4206    are in alphabetical sequence.
4207    
4208    =back
4209    
4210    =cut
4211    
4212    sub SortByValue {
4213        # Get the parameters.
4214        my ($hash) = @_;
4215        # Sort the hash's keys using the values.
4216        my @retVal = sort { Cmp($hash->{$a}, $hash->{$b}) } keys %$hash;
4217        # Return the result.
4218        return @retVal;
4219    }
4220    
4221    =head3 GetSet
4222    
4223        my $value = Tracer::GetSet($object, $name => $newValue);
4224    
4225    Get or set the value of an object field. The object is treated as an
4226    ordinary hash reference. If a new value is specified, it is stored in the
4227    hash under the specified name and then returned. If no new value is
4228    specified, the current value is returned.
4229    
4230    =over 4
4231    
4232    =item object
4233    
4234    Reference to the hash that is to be interrogated or updated.
4235    
4236    =item name
4237    
4238    Name of the field. This is the hash key.
4239    
4240    =item newValue (optional)
4241    
4242    New value to be stored in the field. If no new value is specified, the current
4243    value of the field is returned.
4244    
4245    =item RETURN
4246    
4247    Returns the value of the named field in the specified hash.
4248    
4249    =back
4250    
4251    =cut
4252    
4253    sub GetSet {
4254        # Get the parameters.
4255        my ($object, $name, $newValue) = @_;
4256        # Is a new value specified?
4257        if (defined $newValue) {
4258            # Yes, so store it.
4259            $object->{$name} = $newValue;
4260        }
4261        # Return the result.
4262        return $object->{$name};
4263    }
4264    
4265  1;  1;

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