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;

sub menu {qq{

<div style="font-size: 80%; color: #888">
<a href=/>home</a>
<a href=/server>server</a>
<a href=/client>client</a>
</div>

}}

our $pids;
$pids = { httpd => $$ } unless defined $pids; # keep pids on refresh

sub DESTROY {
        warn "pids ",dump( $pids );
        foreach ( values %$pids ) {
                warn "kill $_";
                kill 1,$_ || kill 9, $_;
        }
}

our $port = 7777;

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

use html;
our $static_pids;
use progress_bar;
use config;

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

        my $full = "$server::base_dir/tftp/$path";

        return if ! -f $full;

        if ( my $pid = fork ) {
                # parent
                close($client);
                print "http static child $pid\n";
                $static_pids->{$pid} = $path;
                return 1;
        }

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

        my $size = -s $full || return;

        print $client "HTTP/1.0 200 OK\r\nContent-Type: $type\r\nContent-Length: $size\r\nConnection: close\r\n\r\n";

        open(my $fh, $full);

        my $block = 1400; # try not to fragment packages (pxelinux seems to have problems with it)
        my $buff;
        my $pos = 0;

        warn "static $path $type $size block: $block\n";

        progress_bar::start;

        while( my $len = read $fh, $buff, $block ) {
                print $client $buff;
                $client->flush;
                $pos += $len;
                progress_bar::tick( $path, $pos, $size );
        }
        close($fh);
        close($client);

        print STDERR "\n";

        warn "exit static child";

        exit(0);
}

use boolean;

use kvm;

$SIG{CHLD} = 'IGNORE';

sub start_stop {
        my $daemon = shift;
        my $pid = $pids->{$daemon} || 'not started';

        warn "start_stop $daemon $pid\n";

        if ( $pid =~ m{^\d+$} ) {
                my $pstree = `pstree -p $pid`;
                my @pids = $pstree =~ m{\((\d+)\)}g;
                warn "pstree $pstree pids ",dump( @pids );
                kill 1, $_ foreach reverse @pids;
                $pids->{$daemon} = 'stopped';
                return qq|$daemon pid $pid stopped|;
        } else {
                if ( $pid = fork ) {
                        # parent
                        $pids->{$daemon} = $pid;
                        warn "forked $daemon $pid\n";
                        return qq|$daemon pid $pid started|;
                } elsif ( defined $pid ) {
                        # child
                        my $invoke = 'start';
                        $invoke = $1 if $daemon =~ s{/(.+)}{};
                        if ( $daemon =~ m{dhcpd|tftpd|dnsd} ) {
                                my $exec = "perl -I$server::base_dir/lib -I$server::base_dir/lib/PXElator -M$daemon -e ${daemon}::${invoke}";
                                warn "exec $exec";
                                exec "xterm -T $daemon -n $daemon -e $exec";
                        } else {
                                my $eval = $daemon . '::' . $invoke . '(' . ( @_ ? dump(@_) : '' ) . ')';
                                warn "eval $eval";
                                eval $eval;
                                warn "can't start $daemon: $@" if $@;
                        }
                        exit;
                } else {
                        die "fork error $!";
                }
        }
}

my $ok =       qq|HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n|;
my $redirect = qq|HTTP/1.1 302 Found\r\nContent-type: text/html\r\nLocation: $url\r\n\r\n|;

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

        server->refresh;

        warn "get_request $path ", $param ? dump( $param ) : '', "\n";

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

                my @rows = (
                        'debug',        qq|<a href=/our/debug/| . boolean::toggle($debug) . qq|>$debug</a>|,
                );

                my $debug_proc = '';

                warn 'pids: ', dump( $pids ) if $debug;
                foreach my $name ( sort keys %$pids ) {
                        my $pid = $pids->{$name} || next;

                        my $html = qq|<a href=/start_stop/$name>$pid</a>|;

                        my $proc = "/proc/$pid/status";

                        if ( -e $proc ) {
                                if ( $debug ) {
                                        $html .= qq| <a name=$pid href=#proc-$pid>?</a>|;

                                        $debug_proc
                                                .= qq|<a name=proc-$pid href=#$pid>$proc</a><pre style="font-size: 10%">|
                                                .  read_file($proc)
                                                .  qq|</pre>|
                                                ;
                                }

                                if ( $name->can('start_fork') ) {
                                        $html .= qq| <a href=/start_stop/kvm/$_>$_</a>| foreach $name->start_fork;
                                }

                                if ( $name->can('actions') ) {
                                        $html .= qq| <a href=/action/kvm/$_>$_</a>| foreach $name->actions;
                                }
                        }

                        push @rows, ( $name => $html );
                }

                my $below_table = '';

                warn 'static_pids: ', dump( $static_pids ) if $debug;
                foreach my $pid ( keys %$static_pids ) {
                        my $path = $static_pids->{$pid};
                        if ( -d "/proc/$pid" ) {
                                push @rows, ( $path => qq|<a href=/kill/static/$pid>$pid</a>| );
                        } elsif ( $param->{clean_completed_downloads} ) {
                                delete $static_pids->{$pid}
                        } else {
                                push @rows, ( $path => "$pid competed" );
                                $below_table = qq|<a href="/?clean_completed_downloads=1">clean completed downloads</a>|;
                        }
                }

                print $client $ok
                        , menu()
                        , html::table( 2, @rows )
                        , $below_table
                        , html::tabs( log::mac_changes )
                        , $debug_proc
                        ;

        } elsif ( $path =~ m{^/server} ) {
                print $client $ok
                        , menu()
                        , html::table( 2, map { ( $_, eval '$server::'.$_ ) } ( 'ip', 'netmask', 'ip_from', 'ip_to', 'domain_name', 'base_dir' ) )
                        ;
        } elsif ( $path =~ m{^/client} ) {
                my $ip = $client->peerhost;
                my $hostname = server::shared( "hostname/$ip", $param->{hostname} );
                my $deploy   = server::shared( "deploy/$ip",   $param->{deploy}   );
                print $client $ok
                        , menu()
                        , qq|<form method=get>|
                        , html::table( 2,
                                'ip' => $ip,
                                'hostname' => qq|<input type=text name=hostname value=$hostname>|,
                                'deploy' => html::select( 'deploy', $deploy, config::available ),
                        )
                        , qq|<input type=submit value=change></form><pre>|
                        , config::for_ip( $ip )
                        , qq|</pre>|
                        ;
        } elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
                eval 'our $' . $1 . ' = ' . $2;
                warn $@ if $@;
                print $client $redirect, qq|<big>$1 = $2</big><br>Location: <a href="$url">$url</a>|;
                server::debug( $debug ) if $1 eq 'debug';
        } elsif ( $path =~ m{^/start_stop/(\S+)} ) {
                print $client $redirect, start_stop($1);
        } elsif ( $path =~ m{^/action/([^/]+)/(.+)} ) {
                $1->$2();
                print $client $redirect;
        } elsif ( $path =~ m{^/kill/static/(\d+)} ) {
                print $client $redirect;
                kill 1, $1 || kill 9, $2 && warn "killed $1";
        } elsif ( $path eq '/exit' ) {
#               DESTROY;
                exit 0;
        } 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";
        }

}

use browser;
use network;

sub start {

        warn 'tap ', network::tap();

        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";

        start_stop 'browser', $url;
        start_stop 'dhcpd';
        start_stop 'tftpd';
        start_stop 'dnsd';
        start_stop 'kvm';

        while (1) {
                my $client = $server->accept() || next; # ALARM trickle us
                my $request = <$client>;

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

                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;
                        }
                        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 menu() 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
21	dpavlin	149	sub menu {qq{
22
23			<div style="font-size: 80%; color: #888">
24			<a href=/>home</a>
25			<a href=/server>server</a>
26	dpavlin	153	<a href=/client>client</a>
27	dpavlin	149	</div>
28
29			}}
30
31	dpavlin	70	our $pids;
32			$pids = { httpd => $$ } unless defined $pids; # keep pids on refresh
33	dpavlin	66
34			sub DESTROY {
35			warn "pids ",dump( $pids );
36			foreach ( values %$pids ) {
37			warn "kill $_";
38			kill 1,$_ \|\| kill 9, $_;
39			}
40			}
41
42	dpavlin	42	our $port = 7777;
43
44			use server;
45	dpavlin	67	our $debug = server::debug;
46	dpavlin	64	our $url = "http://$server::ip:$port";
47	dpavlin	42
48	dpavlin	43	use html;
49	dpavlin	70	our $static_pids;
50	dpavlin	115	use progress_bar;
51	dpavlin	153	use config;
52	dpavlin	43
53	dpavlin	42	sub static {
54			my ($client,$path) = @_;
55
56	dpavlin	65	my $full = "$server::base_dir/tftp/$path";
57	dpavlin	42
58	dpavlin	65	return if ! -f $full;
59	dpavlin	42
60	dpavlin	70	if ( my $pid = fork ) {
61			# parent
62			close($client);
63			print "http static child $pid\n";
64			$static_pids->{$pid} = $path;
65			return 1;
66			}
67
68	dpavlin	65	my $type = 'application/octet-stream';
69	dpavlin	42	$type = 'text/html' if $path =~ m{\.htm};
70			$type = 'application/javascript' if $path =~ m{\.js};
71	dpavlin	65	$type = 'text/plain' if $path =~ m{\.txt};
72	dpavlin	42
73	dpavlin	65	my $size = -s $full \|\| return;
74
75			print $client "HTTP/1.0 200 OK\r\nContent-Type: $type\r\nContent-Length: $size\r\nConnection: close\r\n\r\n";
76
77			open(my $fh, $full);
78
79	dpavlin	96	my $block = 1400; # try not to fragment packages (pxelinux seems to have problems with it)
80	dpavlin	65	my $buff;
81			my $pos = 0;
82
83	dpavlin	105	warn "static $path $type $size block: $block\n";
84	dpavlin	96
85	dpavlin	115	progress_bar::start;
86	dpavlin	105
87	dpavlin	65	while( my $len = read $fh, $buff, $block ) {
88	dpavlin	107	print $client $buff;
89	dpavlin	105	$client->flush;
90	dpavlin	65	$pos += $len;
91	dpavlin	115	progress_bar::tick( $path, $pos, $size );
92	dpavlin	42	}
93	dpavlin	65	close($fh);
94			close($client);
95	dpavlin	42
96	dpavlin	105	print STDERR "\n";
97	dpavlin	65
98	dpavlin	107	warn "exit static child";
99
100			exit(0);
101	dpavlin	42	}
102
103	dpavlin	43	use boolean;
104	dpavlin	57
105			use kvm;
106	dpavlin	42
107	dpavlin	57	$SIG{CHLD} = 'IGNORE';
108
109			sub start_stop {
110			my $daemon = shift;
111	dpavlin	136	my $pid = $pids->{$daemon} \|\| 'not started';
112	dpavlin	57
113	dpavlin	96	warn "start_stop $daemon $pid\n";
114	dpavlin	57
115	dpavlin	67	if ( $pid =~ m{^\d+$} ) {
116	dpavlin	77	my $pstree = `pstree -p $pid`;
117			my @pids = $pstree =~ m{\((\d+)\)}g;
118			warn "pstree $pstree pids ",dump( @pids );
119			kill 1, $_ foreach reverse @pids;
120	dpavlin	66	$pids->{$daemon} = 'stopped';
121	dpavlin	57	return qq\|$daemon pid $pid stopped\|;
122			} else {
123			if ( $pid = fork ) {
124			# parent
125			$pids->{$daemon} = $pid;
126	dpavlin	96	warn "forked $daemon $pid\n";
127	dpavlin	57	return qq\|$daemon pid $pid started\|;
128			} elsif ( defined $pid ) {
129			# child
130	dpavlin	81	my $invoke = 'start';
131			$invoke = $1 if $daemon =~ s{/(.+)}{};
132	dpavlin	158	if ( $daemon =~ m{dhcpd\|tftpd\|dnsd} ) {
133			my $exec = "perl -I$server::base_dir/lib -I$server::base_dir/lib/PXElator -M$daemon -e ${daemon}::${invoke}";
134			warn "exec $exec";
135			exec "xterm -T $daemon -n $daemon -e $exec";
136			} else {
137			my $eval = $daemon . '::' . $invoke . '(' . ( @_ ? dump(@_) : '' ) . ')';
138			warn "eval $eval";
139			eval $eval;
140			warn "can't start $daemon: $@" if $@;
141			}
142	dpavlin	57	exit;
143			} else {
144			die "fork error $!";
145			}
146			}
147			}
148
149	dpavlin	67	my $ok = qq\|HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n\|;
150			my $redirect = qq\|HTTP/1.1 302 Found\r\nContent-type: text/html\r\nLocation: $url\r\n\r\n\|;
151
152	dpavlin	43	sub get_request {
153			my ( $client, $path, $param ) = @_;
154
155	dpavlin	128	server->refresh;
156
157	dpavlin	96	warn "get_request $path ", $param ? dump( $param ) : '', "\n";
158	dpavlin	43
159			if ( my $found = static( $client,$path ) ) {
160			warn "static $found" if $debug;
161			} elsif ( $path eq '/' ) {
162	dpavlin	53
163	dpavlin	66	my @rows = (
164	dpavlin	64	'debug', qq\|<a href=/our/debug/\| . boolean::toggle($debug) . qq\|>$debug</a>\|,
165	dpavlin	43	);
166	dpavlin	70
167	dpavlin	96	my $debug_proc = '';
168	dpavlin	71
169	dpavlin	78	warn 'pids: ', dump( $pids ) if $debug;
170	dpavlin	87	foreach my $name ( sort keys %$pids ) {
171	dpavlin	66	my $pid = $pids->{$name} \|\| next;
172	dpavlin	43
173	dpavlin	89	my $html = qq\|<a href=/start_stop/$name>$pid</a>\|;
174	dpavlin	66
175	dpavlin	81	my $proc = "/proc/$pid/status";
176	dpavlin	71
177	dpavlin	81	if ( -e $proc ) {
178			if ( $debug ) {
179			$html .= qq\| <a name=$pid href=#proc-$pid>?</a>\|;
180
181			$debug_proc
182			.= qq\|<a name=proc-$pid href=#$pid>$proc</a><pre style="font-size: 10%">\|
183			. read_file($proc)
184			. qq\|</pre>\|
185			;
186			}
187
188	dpavlin	88	if ( $name->can('start_fork') ) {
189			$html .= qq\| <a href=/start_stop/kvm/$_>$_</a>\| foreach $name->start_fork;
190	dpavlin	81	}
191	dpavlin	88
192			if ( $name->can('actions') ) {
193			$html .= qq\| <a href=/action/kvm/$_>$_</a>\| foreach $name->actions;
194			}
195	dpavlin	71	}
196
197	dpavlin	66	push @rows, ( $name => $html );
198			}
199
200	dpavlin	91	my $below_table = '';
201
202	dpavlin	78	warn 'static_pids: ', dump( $static_pids ) if $debug;
203	dpavlin	70	foreach my $pid ( keys %$static_pids ) {
204			my $path = $static_pids->{$pid};
205			if ( -d "/proc/$pid" ) {
206			push @rows, ( $path => qq\|<a href=/kill/static/$pid>$pid</a>\| );
207	dpavlin	91	} elsif ( $param->{clean_completed_downloads} ) {
208			delete $static_pids->{$pid}
209	dpavlin	70	} else {
210			push @rows, ( $path => "$pid competed" );
211	dpavlin	91	$below_table = qq\|<a href="/?clean_completed_downloads=1">clean completed downloads</a>\|;
212	dpavlin	70	}
213			}
214
215	dpavlin	72	print $client $ok
216	dpavlin	149	, menu()
217	dpavlin	72	, html::table( 2, @rows )
218	dpavlin	91	, $below_table
219	dpavlin	72	, html::tabs( log::mac_changes )
220			, $debug_proc
221			;
222	dpavlin	66
223	dpavlin	149	} elsif ( $path =~ m{^/server} ) {
224			print $client $ok
225			, menu()
226			, html::table( 2, map { ( $_, eval '$server::'.$_ ) } ( 'ip', 'netmask', 'ip_from', 'ip_to', 'domain_name', 'base_dir' ) )
227			;
228	dpavlin	153	} elsif ( $path =~ m{^/client} ) {
229			my $ip = $client->peerhost;
230			my $hostname = server::shared( "hostname/$ip", $param->{hostname} );
231			my $deploy = server::shared( "deploy/$ip", $param->{deploy} );
232			print $client $ok
233			, menu()
234			, qq\|<form method=get>\|
235			, html::table( 2,
236			'ip' => $ip,
237			'hostname' => qq\|<input type=text name=hostname value=$hostname>\|,
238			'deploy' => html::select( 'deploy', $deploy, config::available ),
239			)
240			, qq\|<input type=submit value=change></form><pre>\|
241			, config::for_ip( $ip )
242			, qq\|</pre>\|
243			;
244	dpavlin	43	} elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
245			eval 'our $' . $1 . ' = ' . $2;
246			warn $@ if $@;
247	dpavlin	67	print $client $redirect, qq\|<big>$1 = $2</big><br>Location: <a href="$url">$url</a>\|;
248			server::debug( $debug ) if $1 eq 'debug';
249	dpavlin	158	} elsif ( $path =~ m{^/start_stop/(\S+)} ) {
250	dpavlin	67	print $client $redirect, start_stop($1);
251	dpavlin	88	} elsif ( $path =~ m{^/action/([^/]+)/(.+)} ) {
252			$1->$2();
253			print $client $redirect;
254	dpavlin	70	} elsif ( $path =~ m{^/kill/static/(\d+)} ) {
255			print $client $redirect;
256	dpavlin	86	kill 1, $1 \|\| kill 9, $2 && warn "killed $1";
257	dpavlin	66	} elsif ( $path eq '/exit' ) {
258			# DESTROY;
259			exit 0;
260	dpavlin	43	} elsif ( $path =~ m{/boot} ) {
261			print $client qq{$ok
262			#!gpxe
263			imgfree
264			login
265			chain http://$server::ip:$httpd::port/
266
267			};
268			} else {
269			print $client "HTTP/1.0 404 $path\r\nConnection: close\r\nContent-type: text/html\r\n\r\n<big>404 $path</big>";
270			warn "404 $path";
271			}
272
273			}
274	dpavlin	53
275	dpavlin	66	use browser;
276	dpavlin	140	use network;
277	dpavlin	66
278	dpavlin	42	sub start {
279
280	dpavlin	140	warn 'tap ', network::tap();
281
282	dpavlin	42	my $server = IO::Socket::INET->new(
283			Proto => 'tcp',
284			LocalPort => $httpd::port,
285			Listen => SOMAXCONN,
286			Reuse => 1
287	dpavlin	43	) \|\| die "can't start server on $url: $!";
288	dpavlin	42
289			print "url $url\n";
290
291	dpavlin	66	start_stop 'browser', $url;
292	dpavlin	158	start_stop 'dhcpd';
293			start_stop 'tftpd';
294			start_stop 'dnsd';
295	dpavlin	66	start_stop 'kvm';
296	dpavlin	42
297	dpavlin	118	while (1) {
298			my $client = $server->accept() \|\| next; # ALARM trickle us
299	dpavlin	42	my $request = <$client>;
300
301			warn "request $request\n" if $debug;
302
303			if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
304	dpavlin	43	my $path = $1;
305	dpavlin	42	my $param;
306	dpavlin	43	if ( $path =~ s{\?(.+)}{} ) {
307	dpavlin	42	foreach my $p ( split(/[&;]/, $1) ) {
308			my ($n,$v) = split(/=/, $p, 2);
309			$param->{$n} = $v;
310			}
311			warn "param: ",dump( $param ) if $debug;
312			}
313	dpavlin	43	get_request $client, $path, $param;
314	dpavlin	42	} else {
315			print $client "HTTP/1.0 500 No method\r\nConnection: close\r\nContent-type: text/plain\r\n\r\n500 $request";
316			warn "500 $request";
317			}
318
319	dpavlin	149	print $client menu() if $client->connected;
320	dpavlin	42
321			}
322
323			die "server died";
324			}
325
326	dpavlin	45	warn "loaded";
327
328	dpavlin	42	1;