lib/PXElator/httpd.pm

package httpd;

use warnings;
use strict;
use autodie;

=head1 httpd

Start with:

  perl -Ilib/PXElator -Mhttpd -e httpd::start

=cut

use Data::Dump qw/dump/;
use Carp qw/confess/;
use File::Slurp;
#use JSON;
use IO::Socket::INET;
use Module::Refresh;

our $port = 7777;
our $debug = 1;

use server;
our $url = "http://$server::ip:$port";

use html;

sub static {
        my ($client,$path) = @_;

        $path = "tftp/$path";

        if ( ! -e $path ||  -d $path ) {
                print $client "HTTP/1.0 404 $path not found\r\n";
                return;
        }

        my $type = 'text/plain';
        $type = 'text/html' if $path =~ m{\.htm};
        $type = 'application/javascript' if $path =~ m{\.js};

        print $client "HTTP/1.0 200 OK\r\nContent-Type: $type\r\nContent-Length: ", -s $path,"\r\n\r\n";
        open(my $html, $path);
        while(<$html>) {
                print $client $_;
        }
        close($html);

        return $path;
}

my $ok = "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n";

use boolean;

use screen;
use kvm;
our $pids;

$SIG{CHLD} = 'IGNORE';

sub start_stop {
        my $daemon = shift;
        my $pid = $pids->{$daemon};

        warn "start_stop $daemon pids: ",dump( $pids );

        if ( $pid ) {
                warn "kill 9 $pid";
                kill 9, $pid;
                delete $pids->{$daemon};
                return qq|$daemon pid $pid stopped|;
        } else {
                if ( $pid = fork ) {
                        # parent
                        $pids->{$daemon} = $pid;
                        warn "forked $daemon $pid";
                        return qq|$daemon pid $pid started|;
                } elsif ( defined $pid ) {
                        # child
                        my $eval = $daemon . '::start';
                        warn "eval $eval";
                        eval $eval;
                        warn "can't start $daemon: $@" if $@;
                        exit;
                } else {
                        die "fork error $!";
                }
        }
}

sub get_request {
        my ( $client, $path, $param ) = @_;

        warn "get_request $client $path ",dump( $param );

        if ( my $found = static( $client,$path ) ) {
                warn "static $found" if $debug;
        } elsif ( $path eq '/' ) {

                my $screen = $pids->{screen} ? qq|stop <tt>$pids->{screen}</tt>|        : 'start';
                my $kvm    = $pids->{kvm}    ? qq|stop <tt>$pids->{kvm}</tt>|           :
                                         $pids->{screen} ? qq|start|                                                    : qq|start screen first|;

                print $client $ok,
                html::table( 2,
                        'pid',          html::tt( $$ ),
                        'ip',           html::tt( $server::ip ),
                        'netmask',      html::tt( $server::netmask ),
                        'debug',        qq|<a href=/our/debug/| . boolean::toggle($debug) . qq|>$debug</a>|,
                        'screen',       qq|<a href=/screen>$screen</a>|,
                        'kvm',          qq|<a href=/kvm>$kvm</a>|,
                );

        } elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
                eval 'our $' . $1 . ' = ' . $2;
                warn $@ if $@;
                print $client qq|HTTP/1.1 302 Found\r\nLocation: $url\r\nContent-type: text/html\r\n\r\n<big>$1 = $2</big><br>Location: <a href="$url">$url</a>|;
        } elsif ( $path =~ m{^/(screen|kvm)} ) {
                print $client $ok, start_stop($1);
        } elsif ( $path =~ m{/boot} ) {
                print $client qq{$ok
#!gpxe
imgfree
login
chain http://$server::ip:$httpd::port/

                        };
        } else {
                print $client "HTTP/1.0 404 $path\r\nConnection: close\r\nContent-type: text/html\r\n\r\n<big>404 $path</big>";
                warn "404 $path";
        }

}

sub start {

        my $server = IO::Socket::INET->new(
                        Proto     => 'tcp',
                        LocalPort => $httpd::port,
                        Listen    => SOMAXCONN,
                        Reuse     => 1
        ) || die "can't start server on $url: $!";

        print "url $url\n";

        system "/mnt/llin/rest/cvs/uzbl/uzbl -u $url &";

        while (my $client = $server->accept()) {
                $client->autoflush(1);
                my $request = <$client>;

                warn "request $request\n" if $debug;

                Module::Refresh->refresh;

                if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
                        my $path = $1;
                        my $param;
                        if ( $path =~ s{\?(.+)}{} ) {
                                foreach my $p ( split(/[&;]/, $1) ) {
                                        my ($n,$v) = split(/=/, $p, 2);
                                        $param->{$n} = $v;
                                }
                                warn "param: ",dump( $param ) if $debug;
                        }
                        warn "path $path param: ",dump( $param );
                        get_request $client, $path, $param;
                } else {
                        print $client "HTTP/1.0 500 No method\r\nConnection: close\r\nContent-type: text/plain\r\n\r\n500 $request";
                        warn "500 $request";
                }

                print $client qq{
                <div style="font-size: 80%; color: #888">
                <a href="">reload</a>
                <a href="/">index</a>
                </div>
                } if $client->connected;

        }

        die "server died";
}

warn "loaded";

1;
1	dpavlin	42	package httpd;
2
3			use warnings;
4			use strict;
5			use autodie;
6
7			=head1 httpd
8
9			Start with:
10
11			perl -Ilib/PXElator -Mhttpd -e httpd::start
12
13			=cut
14
15			use Data::Dump qw/dump/;
16			use Carp qw/confess/;
17			use File::Slurp;
18			#use JSON;
19			use IO::Socket::INET;
20	dpavlin	43	use Module::Refresh;
21	dpavlin	42
22			our $port = 7777;
23			our $debug = 1;
24
25			use server;
26	dpavlin	64	our $url = "http://$server::ip:$port";
27	dpavlin	42
28	dpavlin	43	use html;
29
30	dpavlin	42	sub static {
31			my ($client,$path) = @_;
32
33			$path = "tftp/$path";
34
35			if ( ! -e $path \|\| -d $path ) {
36			print $client "HTTP/1.0 404 $path not found\r\n";
37			return;
38			}
39
40			my $type = 'text/plain';
41			$type = 'text/html' if $path =~ m{\.htm};
42			$type = 'application/javascript' if $path =~ m{\.js};
43
44			print $client "HTTP/1.0 200 OK\r\nContent-Type: $type\r\nContent-Length: ", -s $path,"\r\n\r\n";
45			open(my $html, $path);
46			while(<$html>) {
47			print $client $_;
48			}
49			close($html);
50
51			return $path;
52			}
53
54			my $ok = "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n";
55
56	dpavlin	43	use boolean;
57	dpavlin	57
58	dpavlin	53	use screen;
59	dpavlin	57	use kvm;
60			our $pids;
61	dpavlin	42
62	dpavlin	57	$SIG{CHLD} = 'IGNORE';
63
64			sub start_stop {
65			my $daemon = shift;
66			my $pid = $pids->{$daemon};
67
68			warn "start_stop $daemon pids: ",dump( $pids );
69
70			if ( $pid ) {
71			warn "kill 9 $pid";
72			kill 9, $pid;
73			delete $pids->{$daemon};
74			return qq\|$daemon pid $pid stopped\|;
75			} else {
76			if ( $pid = fork ) {
77			# parent
78			$pids->{$daemon} = $pid;
79			warn "forked $daemon $pid";
80			return qq\|$daemon pid $pid started\|;
81			} elsif ( defined $pid ) {
82			# child
83			my $eval = $daemon . '::start';
84			warn "eval $eval";
85			eval $eval;
86			warn "can't start $daemon: $@" if $@;
87			exit;
88			} else {
89			die "fork error $!";
90			}
91			}
92			}
93
94	dpavlin	43	sub get_request {
95			my ( $client, $path, $param ) = @_;
96
97	dpavlin	53	warn "get_request $client $path ",dump( $param );
98	dpavlin	43
99			if ( my $found = static( $client,$path ) ) {
100			warn "static $found" if $debug;
101			} elsif ( $path eq '/' ) {
102	dpavlin	53
103	dpavlin	57	my $screen = $pids->{screen} ? qq\|stop <tt>$pids->{screen}</tt>\| : 'start';
104			my $kvm = $pids->{kvm} ? qq\|stop <tt>$pids->{kvm}</tt>\| :
105			$pids->{screen} ? qq\|start\| : qq\|start screen first\|;
106	dpavlin	53
107	dpavlin	43	print $client $ok,
108			html::table( 2,
109	dpavlin	64	'pid', html::tt( $$ ),
110			'ip', html::tt( $server::ip ),
111			'netmask', html::tt( $server::netmask ),
112			'debug', qq\|<a href=/our/debug/\| . boolean::toggle($debug) . qq\|>$debug</a>\|,
113			'screen', qq\|<a href=/screen>$screen</a>\|,
114			'kvm', qq\|<a href=/kvm>$kvm</a>\|,
115	dpavlin	43	);
116
117			} elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
118			eval 'our $' . $1 . ' = ' . $2;
119			warn $@ if $@;
120			print $client qq\|HTTP/1.1 302 Found\r\nLocation: $url\r\nContent-type: text/html\r\n\r\n<big>$1 = $2</big><br>Location: <a href="$url">$url</a>\|;
121	dpavlin	57	} elsif ( $path =~ m{^/(screen\|kvm)} ) {
122			print $client $ok, start_stop($1);
123	dpavlin	43	} elsif ( $path =~ m{/boot} ) {
124			print $client qq{$ok
125			#!gpxe
126			imgfree
127			login
128			chain http://$server::ip:$httpd::port/
129
130			};
131			} else {
132			print $client "HTTP/1.0 404 $path\r\nConnection: close\r\nContent-type: text/html\r\n\r\n<big>404 $path</big>";
133			warn "404 $path";
134			}
135
136			}
137	dpavlin	53
138	dpavlin	42	sub start {
139
140			my $server = IO::Socket::INET->new(
141			Proto => 'tcp',
142			LocalPort => $httpd::port,
143			Listen => SOMAXCONN,
144			Reuse => 1
145	dpavlin	43	) \|\| die "can't start server on $url: $!";
146	dpavlin	42
147			print "url $url\n";
148
149			system "/mnt/llin/rest/cvs/uzbl/uzbl -u $url &";
150
151			while (my $client = $server->accept()) {
152			$client->autoflush(1);
153			my $request = <$client>;
154
155			warn "request $request\n" if $debug;
156
157	dpavlin	43	Module::Refresh->refresh;
158
159	dpavlin	42	if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
160	dpavlin	43	my $path = $1;
161	dpavlin	42	my $param;
162	dpavlin	43	if ( $path =~ s{\?(.+)}{} ) {
163	dpavlin	42	foreach my $p ( split(/[&;]/, $1) ) {
164			my ($n,$v) = split(/=/, $p, 2);
165			$param->{$n} = $v;
166			}
167			warn "param: ",dump( $param ) if $debug;
168			}
169	dpavlin	43	warn "path $path param: ",dump( $param );
170			get_request $client, $path, $param;
171	dpavlin	42	} else {
172			print $client "HTTP/1.0 500 No method\r\nConnection: close\r\nContent-type: text/plain\r\n\r\n500 $request";
173			warn "500 $request";
174			}
175
176			print $client qq{
177	dpavlin	43	<div style="font-size: 80%; color: #888">
178			<a href="">reload</a>
179			<a href="/">index</a>
180			</div>
181			} if $client->connected;
182	dpavlin	42
183			}
184
185			die "server died";
186			}
187
188	dpavlin	45	warn "loaded";
189
190	dpavlin	42	1;