NAME
   CGI::AppBuilder - CGI Application Builder

SYNOPSIS
     use CGI::AppBuilder;

     my $cg = CGI::AppBuilder->new('ifn', 'my_init.cfg', 'opt', 'vhS:a:');
     my $ar = $cg->get_inputs;

DESCRIPTION
   There are already many application builders out there. Why you need
   another one? Well, if you are already familiar with CGI::Builder or
   CGI::Application, this one will provide some useful methods to you to
   read your configuration file and pre-process your templates. Please read
   on.

  new (ifn => 'file.cfg', opt => 'hvS:')
   Input variables:

     $ifn  - input/initial file name.
     $opt  - options for Getopt::Std

   Variables used or routines called:

     None

   How to use:

      my $ca = new CGI::AppBuilder;      # or
      my $ca = CGI::AppBuilder->new;     # or
      my $ca = CGI::AppBuilder->new(ifn=>'file.cfg',opt=>'hvS:'); # or
      my $ca = CGI::AppBuilder->new('ifn', 'file.cfg','opt','hvS:');

   Return: new empty or initialized CGI::AppBuilder object.

   This method constructs a Perl object and capture any parameters if
   specified. It creates and defaults the following variables:

     $self->{ifn} = ""
     $self->{opt} = 'hvS:';

  start_app ($prg,$arg,$nhh)
   Input variables:

     $prg  - program name
     $arg  - array ref for arguments - %ARGV
     $nhh  - no html header pre-printed
             1 - no HTML header is set in any circumstance
             0 - HTML header will be set when it is possible

   Variables used or routines called:

     build_html_header - build HTML header array
     Debug::EchoMessage
       echo_msg  - echo messages
       start_log - start and write message log
     CGI::Getopt
       get_inputs - read input file and/or CGI form inputs

   How to use:

      my ($q, $ar, $ar_log) = $self->start_app($0,\@ARGV);

   Return: ($q,$ar,$ar_log) where

     $q - a CGI object
     $ar - hash ref containing parameters from input file and/or
           CGI form inputs and the following elements:
       ifn - initial file name
       opt - command input options
       cfg - configuratoin array
       html_header - HTML header parameters (hash ref)
       msg - contain message hash
     $ar_log - hash ref containing log information

   This method performs the following tasks:

     1) initial a CGI object
     2) read initial file if specified or search for a default file
        (the same as $prg with .ini extension) and save the file name
        to $ar->{ifn}.
     3) define message level
     4) start HTML header and body using I<page_title> and I<page_style>
        if they are defined.
     5) parse CGI form inputs and combine them with parameters defined
        in initial file
     6) read configuration file ($prg.cfg) if it exists and save the
        array to $ar->{cfg}
     7) prepare log record if write log is enabled

   It checks the parameters read from initial file for page_title,
   page_style, page_author, page_meta, top_nav, bottom_nav, and js_src.

  end_app ($q, $ar, $ar_log, $nhh)
   Input variables:

     $q    - CGI object
     $ar   - array ref for parameters
     $ar_log - hash ref for log record
     $nhh  - no html header pre-printed
             1 - no HTML is printed in any circumstance
             0 - HTML header will be printed when it is possible

   Variables used or routines called:

     Debug::EchoMessage
       echo_msg - echo messages
       end_log - start and write message log
       set_param - get a parameter from hash array

   How to use:

      my ($q, $ar, $ar_log) = $self->start_app($0,\@ARGV);
      $self->end_app($q, $ar, $ar_log);

   Return: none

   This method performs the following tasks:

     1) ends HTML document
     2) writes log records to log files
     3) close database connection if it finds DB handler in {dbh}

HISTORY
   * Version 0.10
       This version is to extract out the app methods from CGI::Getopt
       class. It was too much for CGI::Getopt to include the start_app,
       end_app, build_html_header, and disp_form methods.

         0.11 Rewrote start_app method so that content-type can be changed.
         0.12 Moved disp_form to CGI::AppBuilder::Form,
              moved build_html_header to CGI::AppBuilder::Header, and
              imported all the methods in sub-classes into this class.

   * Version 0.20

SEE ALSO (some of docs that I check often)
       Oracle::Loader, Oracle::Trigger, CGI::Getopt, File::Xcopy,
       CGI::AppBuilder, CGI::AppBuilder::Message, CGI::AppBuilder::Log,
       CGI::AppBuilder::Config, etc.

AUTHOR
       Copyright (c) 2005 Hanming Tu. All rights reserved.

       This package is free software and is provided "as is" without
       express or implied warranty. It may be used, redistributed and/or
       modified under the terms of the Perl Artistic License (see
       http://www.perl.com/perl/misc/Artistic.html)

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