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ServerApp

by qbxk (Friar)
on Dec 28, 2005 at 21:10 UTC ( #519639=sourcecode: print w/replies, xml ) Need Help??
Category: GUI Programming ??
Author/Contact Info Brian Bittman brian@bxbd.net
Description: Encapsulate and make-simple all the things you need to write your program as a mini-web-server-and-application - deliver your GUI to a local (or remote) browser

package ServerApp;

use strict;
use HTTP::Daemon;
use HTTP::Status;

use vars qw(@ISA @EXPORT @EXPORT_OK $VERSION);
$VERSION    = ".001";
## not only PRE-ALPHA code, but SPECULATIVE, EXPERIMENTAL probing in t
+he dark at a possibly original concept - go easy.

use constant DEBUG => 0;
use constant DEBUG_BASIC => 0;

sub new {
    my $self = shift;
    my ($args) = @_;

    #use Data::Dumper; print Dumper($args);

    die "Need a port" if !$args->{Port};

    $self = {};

    $self->{'_async'} = $args->{_async} ? 1 : 0;

    $self->{'_daemon'} = new HTTP::Daemon(
        LocalAddr => '127.0.0.1',
        LocalPort => $args->{Port},
    );
    $self->{'_handlers'} = $args->{With} ? $args->{With} : [] ;

    return bless($self, 'ServerApp');
}

sub run_with {
    my $self = shift;
    my @paths = @_;

    return $self->_run(@paths);

}

sub daemon { return $_[0]->{'_daemon'} }
sub async { return $_[0]->{'_async'} }
sub handlers { return $_[0]->{'_handlers'}  }

sub _run {
    my $self = shift;
    my @paths = @_;

    unshift(@paths, @{ $self->handlers });

    my $d = $self->daemon;

    print " ready @: <URL:", $d->url, ">\n" if DEBUG_BASIC;

    while (my $c = $d->accept) {
      my $r = $c->get_request;
      if ($r) {
          print "REQUEST: " .  Dumper($r) . "" if DEBUG_BASIC;

            my $res = new HTTP::Response( 200, "OK" );
            my $result = handleRequest($r, @paths);

            if( $result->{content} ) {
                $res->header( -content_type => "text/html" );
                $res->content( $result->{content} );
            }
            elsif( $result->{js} ) {
                use Data::JavaScript::Anon;
                $res->header( -content_type => " application/x-javascr
+ipt" );
                $res->content(  Data::JavaScript::Anon->anon_dump($res
+ult->{js}) );
            }


            $c->send_response($res);

            if( exists $result->{exit_with} ) {
                $c = undef;  # close connection
                return $result->{exit_with};
            }

              #~ print "FOUR OH FOUR\n";
              #~ #$c->send_error(RC_FORBIDDEN);

        print " --------------------------\n" if DEBUG_BASIC;
      }
      $c = undef;  # close connection
    }
}

sub handleRequest {
    my ($req, @paths) = @_;

    my $result = {};
    foreach( @paths ) {
        my ($match, $fcn, $ret) = @$_;

        my $info = checkIfMatches($req, $match);
        if( DEBUG ) {
            use Data::Dumper;
            print $req->url->path . " vs. " . Dumper($match) . " = " .
+ ($info ? "(yes): " . Dumper($info) . "\n" : "(no)\n\n");
        }
        next unless $info;

        if( ref($fcn) eq 'CODE') {
            $result = &$fcn($req, $info);
        }
        else {
            $result = $fcn;
        }

        if( ref($result) eq '' ) {
            $result = { content => $result };
        }

        if( DEBUG ) {
            use Data::Dumper;
            print Dumper( $result );
        }

        if( $ret ) {
            if( ref($ret) eq 'CODE') {
                $result->{exit_with} = &$ret($req);
            }
            else {
                $result->{exit_with} = $ret;
            }
            print "Will exit with $result->{exit_with}" if( DEBUG ) ;
        }

        return $result;
    }

    if( DEBUG ) {
        print "404\n\n";
    }
    return { content=> "404:\n" . Dumper($req) };
}

sub checkIfMatches {
    my ($req, $match) = @_;

    my $ref = ref($match);
    print "\tChecking a " . ($ref ne '' ? $ref : "String($match)") . "
+ against: " . $req->url->path . "..\n" if DEBUG;

    if( $ref eq 'Regexp' ) {
        if( $req->url->path =~ $match ) {
            return { type => $ref, matches => [$req->url->path, $1, $2
+, $3, $4, $5, $6, $7, $8, $9] };
        }
    }
    elsif( $ref eq 'CODE') {
        my $r = &$match($req);
        print "\t\t\treturned:  " . Dumper($r) . "\n" if DEBUG;
        if( $r ) {
            return { type => $ref, value => $r };
        }

    }
    elsif( $ref eq 'ARRAY') {
    #any of, or all of these?  anyway to indicate one or the other?
        foreach( @$match ) {
            my $v = checkIfMatches($req, $_);
            return { type => $ref, matched => $_, result => $v } if $v
+;
        }
    }
    elsif( $ref eq 'HASH') {
        return { type => $ref, value => $match->{$req} } if exists($ma
+tch->{$req});
    }
    elsif( $ref eq '') {
        return { type => $ref, value => 1 } if $req->url->path =~ /^\/
+?$match$/;
    }
    else {
        warn "Unknown ref(): $ref";
    }
    return undef;
}

1;



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