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;
use client;
use log;

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 = client::conf( $ip, 'hostname' => $param->{hostname} );
                my $deploy   = client::conf( $ip, 'deploy'   => $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	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	sub menu {qq{
22
23	<div style="font-size: 80%; color: #888">
24	<a href=/>home</a>
25	<a href=/server>server</a>
26	<a href=/client>client</a>
27	</div>
28
29	}}
30
31	our $pids;
32	$pids = { httpd => $$ } unless defined $pids; # keep pids on refresh
33
34	sub DESTROY {
35	warn "pids ",dump( $pids );
36	foreach ( values %$pids ) {
37	warn "kill $_";
38	kill 1,$_ \|\| kill 9, $_;
39	}
40	}
41
42	our $port = 7777;
43
44	use server;
45	our $debug = server::debug;
46	our $url = "http://$server::ip:$port";
47
48	use html;
49	our $static_pids;
50	use progress_bar;
51	use config;
52	use client;
53	use log;
54
55	sub static {
56	my ($client,$path) = @_;
57
58	my $full = "$server::base_dir/tftp/$path";
59
60	return if ! -f $full;
61
62	if ( my $pid = fork ) {
63	# parent
64	close($client);
65	print "http static child $pid\n";
66	$static_pids->{$pid} = $path;
67	return 1;
68	}
69
70	my $type = 'application/octet-stream';
71	$type = 'text/html' if $path =~ m{\.htm};
72	$type = 'application/javascript' if $path =~ m{\.js};
73	$type = 'text/plain' if $path =~ m{\.txt};
74
75	my $size = -s $full \|\| return;
76
77	print $client "HTTP/1.0 200 OK\r\nContent-Type: $type\r\nContent-Length: $size\r\nConnection: close\r\n\r\n";
78
79	open(my $fh, $full);
80
81	my $block = 1400; # try not to fragment packages (pxelinux seems to have problems with it)
82	my $buff;
83	my $pos = 0;
84
85	warn "static $path $type $size block: $block\n";
86
87	progress_bar::start;
88
89	while( my $len = read $fh, $buff, $block ) {
90	print $client $buff;
91	$client->flush;
92	$pos += $len;
93	progress_bar::tick( $path, $pos, $size );
94	}
95	close($fh);
96	close($client);
97
98	print STDERR "\n";
99
100	warn "exit static child";
101
102	exit(0);
103	}
104
105	use boolean;
106
107	use kvm;
108
109	$SIG{CHLD} = 'IGNORE';
110
111	sub start_stop {
112	my $daemon = shift;
113	my $pid = $pids->{$daemon} \|\| 'not started';
114
115	warn "start_stop $daemon $pid\n";
116
117	if ( $pid =~ m{^\d+$} ) {
118	my $pstree = `pstree -p $pid`;
119	my @pids = $pstree =~ m{\((\d+)\)}g;
120	warn "pstree $pstree pids ",dump( @pids );
121	kill 1, $_ foreach reverse @pids;
122	$pids->{$daemon} = 'stopped';
123	return qq\|$daemon pid $pid stopped\|;
124	} else {
125	if ( $pid = fork ) {
126	# parent
127	$pids->{$daemon} = $pid;
128	warn "forked $daemon $pid\n";
129	return qq\|$daemon pid $pid started\|;
130	} elsif ( defined $pid ) {
131	# child
132	my $invoke = 'start';
133	$invoke = $1 if $daemon =~ s{/(.+)}{};
134	if ( $daemon =~ m{dhcpd\|tftpd\|dnsd} ) {
135	my $exec = "perl -I$server::base_dir/lib -I$server::base_dir/lib/PXElator -M$daemon -e ${daemon}::${invoke}";
136	warn "exec $exec";
137	exec "xterm -T $daemon -n $daemon -e $exec";
138	} else {
139	my $eval = $daemon . '::' . $invoke . '(' . ( @_ ? dump(@_) : '' ) . ')';
140	warn "eval $eval";
141	eval $eval;
142	warn "can't start $daemon: $@" if $@;
143	}
144	exit;
145	} else {
146	die "fork error $!";
147	}
148	}
149	}
150
151	my $ok = qq\|HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n\|;
152	my $redirect = qq\|HTTP/1.1 302 Found\r\nContent-type: text/html\r\nLocation: $url\r\n\r\n\|;
153
154	sub get_request {
155	my ( $client, $path, $param ) = @_;
156
157	server->refresh;
158
159	warn "get_request $path ", $param ? dump( $param ) : '', "\n";
160
161	if ( my $found = static( $client,$path ) ) {
162	warn "static $found" if $debug;
163	} elsif ( $path eq '/' ) {
164
165	my @rows = (
166	'debug', qq\|<a href=/our/debug/\| . boolean::toggle($debug) . qq\|>$debug</a>\|,
167	);
168
169	my $debug_proc = '';
170
171	warn 'pids: ', dump( $pids ) if $debug;
172	foreach my $name ( sort keys %$pids ) {
173	my $pid = $pids->{$name} \|\| next;
174
175	my $html = qq\|<a href=/start_stop/$name>$pid</a>\|;
176
177	my $proc = "/proc/$pid/status";
178
179	if ( -e $proc ) {
180	if ( $debug ) {
181	$html .= qq\| <a name=$pid href=#proc-$pid>?</a>\|;
182
183	$debug_proc
184	.= qq\|<a name=proc-$pid href=#$pid>$proc</a><pre style="font-size: 10%">\|
185	. read_file($proc)
186	. qq\|</pre>\|
187	;
188	}
189
190	if ( $name->can('start_fork') ) {
191	$html .= qq\| <a href=/start_stop/kvm/$_>$_</a>\| foreach $name->start_fork;
192	}
193
194	if ( $name->can('actions') ) {
195	$html .= qq\| <a href=/action/kvm/$_>$_</a>\| foreach $name->actions;
196	}
197	}
198
199	push @rows, ( $name => $html );
200	}
201
202	my $below_table = '';
203
204	warn 'static_pids: ', dump( $static_pids ) if $debug;
205	foreach my $pid ( keys %$static_pids ) {
206	my $path = $static_pids->{$pid};
207	if ( -d "/proc/$pid" ) {
208	push @rows, ( $path => qq\|<a href=/kill/static/$pid>$pid</a>\| );
209	} elsif ( $param->{clean_completed_downloads} ) {
210	delete $static_pids->{$pid}
211	} else {
212	push @rows, ( $path => "$pid competed" );
213	$below_table = qq\|<a href="/?clean_completed_downloads=1">clean completed downloads</a>\|;
214	}
215	}
216
217	print $client $ok
218	, menu()
219	, html::table( 2, @rows )
220	, $below_table
221	, html::tabs( log::mac_changes )
222	, $debug_proc
223	;
224
225	} elsif ( $path =~ m{^/server} ) {
226	print $client $ok
227	, menu()
228	, html::table( 2, map { ( $_, eval '$server::'.$_ ) } ( 'ip', 'netmask', 'ip_from', 'ip_to', 'domain_name', 'base_dir' ) )
229	;
230	} elsif ( $path =~ m{^/client} ) {
231	my $ip = $client->peerhost;
232	my $hostname = client::conf( $ip, 'hostname' => $param->{hostname} );
233	my $deploy = client::conf( $ip, 'deploy' => $param->{deploy} );
234	print $client $ok
235	, menu()
236	, qq\|<form method=get>\|
237	, html::table( 2,
238	'ip' => $ip,
239	'hostname' => qq\|<input type=text name=hostname value=$hostname>\|,
240	'deploy' => html::select( 'deploy', $deploy, config::available ),
241	)
242	, qq\|<input type=submit value=change></form><pre>\|
243	, config::for_ip( $ip )
244	, qq\|</pre>\|
245	;
246	} elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
247	eval 'our $' . $1 . ' = ' . $2;
248	warn $@ if $@;
249	print $client $redirect, qq\|<big>$1 = $2</big><br>Location: <a href="$url">$url</a>\|;
250	server::debug( $debug ) if $1 eq 'debug';
251	} elsif ( $path =~ m{^/start_stop/(\S+)} ) {
252	print $client $redirect, start_stop($1);
253	} elsif ( $path =~ m{^/action/([^/]+)/(.+)} ) {
254	$1->$2();
255	print $client $redirect;
256	} elsif ( $path =~ m{^/kill/static/(\d+)} ) {
257	print $client $redirect;
258	kill 1, $1 \|\| kill 9, $2 && warn "killed $1";
259	} elsif ( $path eq '/exit' ) {
260	# DESTROY;
261	exit 0;
262	} elsif ( $path =~ m{/boot} ) {
263	print $client qq{$ok
264	#!gpxe
265	imgfree
266	login
267	chain http://$server::ip:$httpd::port/
268
269	};
270	} else {
271	print $client "HTTP/1.0 404 $path\r\nConnection: close\r\nContent-type: text/html\r\n\r\n<big>404 $path</big>";
272	warn "404 $path";
273	}
274
275	}
276
277	use browser;
278	use network;
279
280	sub start {
281
282	warn 'tap ', network::tap();
283
284	my $server = IO::Socket::INET->new(
285	Proto => 'tcp',
286	LocalPort => $httpd::port,
287	Listen => SOMAXCONN,
288	Reuse => 1
289	) \|\| die "can't start server on $url: $!";
290
291	print "url $url\n";
292
293	start_stop 'browser', $url;
294	start_stop 'dhcpd';
295	start_stop 'tftpd';
296	start_stop 'dnsd';
297	start_stop 'kvm';
298
299	while (1) {
300	my $client = $server->accept() \|\| next; # ALARM trickle us
301	my $request = <$client>;
302
303	warn "request $request\n" if $debug;
304
305	if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
306	my $path = $1;
307	my $param;
308	if ( $path =~ s{\?(.+)}{} ) {
309	foreach my $p ( split(/[&;]/, $1) ) {
310	my ($n,$v) = split(/=/, $p, 2);
311	$param->{$n} = $v;
312	}
313	warn "param: ",dump( $param ) if $debug;
314	}
315	get_request $client, $path, $param;
316	} else {
317	print $client "HTTP/1.0 500 No method\r\nConnection: close\r\nContent-type: text/plain\r\n\r\n500 $request";
318	warn "500 $request";
319	}
320
321	print $client menu() if $client->connected;
322
323	}
324
325	die "server died";
326	}
327
328	warn "loaded";
329
330	1;