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>
</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;

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 screen;
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{/(.+)}{};
                        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 $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|;

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