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 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{^/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/((?: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	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	dpavlin	53	use screen;
106	dpavlin	57	use kvm;
107	dpavlin	42
108	dpavlin	57	$SIG{CHLD} = 'IGNORE';
109
110			sub start_stop {
111			my $daemon = shift;
112	dpavlin	136	my $pid = $pids->{$daemon} \|\| 'not started';
113	dpavlin	57
114	dpavlin	96	warn "start_stop $daemon $pid\n";
115	dpavlin	57
116	dpavlin	67	if ( $pid =~ m{^\d+$} ) {
117	dpavlin	77	my $pstree = `pstree -p $pid`;
118			my @pids = $pstree =~ m{\((\d+)\)}g;
119			warn "pstree $pstree pids ",dump( @pids );
120			kill 1, $_ foreach reverse @pids;
121	dpavlin	66	$pids->{$daemon} = 'stopped';
122	dpavlin	57	return qq\|$daemon pid $pid stopped\|;
123			} else {
124			if ( $pid = fork ) {
125			# parent
126			$pids->{$daemon} = $pid;
127	dpavlin	96	warn "forked $daemon $pid\n";
128	dpavlin	57	return qq\|$daemon pid $pid started\|;
129			} elsif ( defined $pid ) {
130			# child
131	dpavlin	81	my $invoke = 'start';
132			$invoke = $1 if $daemon =~ s{/(.+)}{};
133			my $eval = $daemon . '::' . $invoke . '(' . ( @_ ? dump(@_) : '' ) . ')';
134	dpavlin	57	warn "eval $eval";
135			eval $eval;
136			warn "can't start $daemon: $@" if $@;
137			exit;
138			} else {
139			die "fork error $!";
140			}
141			}
142			}
143
144	dpavlin	67	my $ok = qq\|HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n\|;
145			my $redirect = qq\|HTTP/1.1 302 Found\r\nContent-type: text/html\r\nLocation: $url\r\n\r\n\|;
146
147	dpavlin	43	sub get_request {
148			my ( $client, $path, $param ) = @_;
149
150	dpavlin	128	server->refresh;
151
152	dpavlin	96	warn "get_request $path ", $param ? dump( $param ) : '', "\n";
153	dpavlin	43
154			if ( my $found = static( $client,$path ) ) {
155			warn "static $found" if $debug;
156			} elsif ( $path eq '/' ) {
157	dpavlin	53
158	dpavlin	57	my $screen = $pids->{screen} ? qq\|stop <tt>$pids->{screen}</tt>\| : 'start';
159			my $kvm = $pids->{kvm} ? qq\|stop <tt>$pids->{kvm}</tt>\| :
160			$pids->{screen} ? qq\|start\| : qq\|start screen first\|;
161	dpavlin	53
162	dpavlin	66	my @rows = (
163	dpavlin	64	'debug', qq\|<a href=/our/debug/\| . boolean::toggle($debug) . qq\|>$debug</a>\|,
164	dpavlin	43	);
165	dpavlin	70
166	dpavlin	96	my $debug_proc = '';
167	dpavlin	71
168	dpavlin	78	warn 'pids: ', dump( $pids ) if $debug;
169	dpavlin	87	foreach my $name ( sort keys %$pids ) {
170	dpavlin	66	my $pid = $pids->{$name} \|\| next;
171	dpavlin	43
172	dpavlin	89	my $html = qq\|<a href=/start_stop/$name>$pid</a>\|;
173	dpavlin	66
174	dpavlin	81	my $proc = "/proc/$pid/status";
175	dpavlin	71
176	dpavlin	81	if ( -e $proc ) {
177			if ( $debug ) {
178			$html .= qq\| <a name=$pid href=#proc-$pid>?</a>\|;
179
180			$debug_proc
181			.= qq\|<a name=proc-$pid href=#$pid>$proc</a><pre style="font-size: 10%">\|
182			. read_file($proc)
183			. qq\|</pre>\|
184			;
185			}
186
187	dpavlin	88	if ( $name->can('start_fork') ) {
188			$html .= qq\| <a href=/start_stop/kvm/$_>$_</a>\| foreach $name->start_fork;
189	dpavlin	81	}
190	dpavlin	88
191			if ( $name->can('actions') ) {
192			$html .= qq\| <a href=/action/kvm/$_>$_</a>\| foreach $name->actions;
193			}
194	dpavlin	71	}
195
196	dpavlin	66	push @rows, ( $name => $html );
197			}
198
199	dpavlin	91	my $below_table = '';
200
201	dpavlin	78	warn 'static_pids: ', dump( $static_pids ) if $debug;
202	dpavlin	70	foreach my $pid ( keys %$static_pids ) {
203			my $path = $static_pids->{$pid};
204			if ( -d "/proc/$pid" ) {
205			push @rows, ( $path => qq\|<a href=/kill/static/$pid>$pid</a>\| );
206	dpavlin	91	} elsif ( $param->{clean_completed_downloads} ) {
207			delete $static_pids->{$pid}
208	dpavlin	70	} else {
209			push @rows, ( $path => "$pid competed" );
210	dpavlin	91	$below_table = qq\|<a href="/?clean_completed_downloads=1">clean completed downloads</a>\|;
211	dpavlin	70	}
212			}
213
214	dpavlin	72	print $client $ok
215	dpavlin	149	, menu()
216	dpavlin	72	, html::table( 2, @rows )
217	dpavlin	91	, $below_table
218	dpavlin	72	, html::tabs( log::mac_changes )
219			, $debug_proc
220			;
221	dpavlin	66
222	dpavlin	149	} elsif ( $path =~ m{^/server} ) {
223			print $client $ok
224			, menu()
225			, html::table( 2, map { ( $_, eval '$server::'.$_ ) } ( 'ip', 'netmask', 'ip_from', 'ip_to', 'domain_name', 'base_dir' ) )
226			;
227	dpavlin	153	} elsif ( $path =~ m{^/client} ) {
228			my $ip = $client->peerhost;
229			my $hostname = server::shared( "hostname/$ip", $param->{hostname} );
230			my $deploy = server::shared( "deploy/$ip", $param->{deploy} );
231			print $client $ok
232			, menu()
233			, qq\|<form method=get>\|
234			, html::table( 2,
235			'ip' => $ip,
236			'hostname' => qq\|<input type=text name=hostname value=$hostname>\|,
237			'deploy' => html::select( 'deploy', $deploy, config::available ),
238			)
239			, qq\|<input type=submit value=change></form><pre>\|
240			, config::for_ip( $ip )
241			, qq\|</pre>\|
242			;
243	dpavlin	43	} elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
244			eval 'our $' . $1 . ' = ' . $2;
245			warn $@ if $@;
246	dpavlin	67	print $client $redirect, qq\|<big>$1 = $2</big><br>Location: <a href="$url">$url</a>\|;
247			server::debug( $debug ) if $1 eq 'debug';
248	dpavlin	89	} elsif ( $path =~ m{^/start_stop/((?:screen\|kvm).*)} ) { # XXX we don't want to stop all classes
249	dpavlin	67	print $client $redirect, start_stop($1);
250	dpavlin	88	} elsif ( $path =~ m{^/action/([^/]+)/(.+)} ) {
251			$1->$2();
252			print $client $redirect;
253	dpavlin	70	} elsif ( $path =~ m{^/kill/static/(\d+)} ) {
254			print $client $redirect;
255	dpavlin	86	kill 1, $1 \|\| kill 9, $2 && warn "killed $1";
256	dpavlin	66	} elsif ( $path eq '/exit' ) {
257			# DESTROY;
258			exit 0;
259	dpavlin	43	} elsif ( $path =~ m{/boot} ) {
260			print $client qq{$ok
261			#!gpxe
262			imgfree
263			login
264			chain http://$server::ip:$httpd::port/
265
266			};
267			} else {
268			print $client "HTTP/1.0 404 $path\r\nConnection: close\r\nContent-type: text/html\r\n\r\n<big>404 $path</big>";
269			warn "404 $path";
270			}
271
272			}
273	dpavlin	53
274	dpavlin	66	use browser;
275	dpavlin	140	use network;
276	dpavlin	66
277	dpavlin	42	sub start {
278
279	dpavlin	140	warn 'tap ', network::tap();
280
281	dpavlin	42	my $server = IO::Socket::INET->new(
282			Proto => 'tcp',
283			LocalPort => $httpd::port,
284			Listen => SOMAXCONN,
285			Reuse => 1
286	dpavlin	43	) \|\| die "can't start server on $url: $!";
287	dpavlin	42
288			print "url $url\n";
289
290	dpavlin	66	start_stop 'browser', $url;
291			start_stop 'screen';
292			start_stop 'kvm';
293	dpavlin	42
294	dpavlin	118	while (1) {
295			my $client = $server->accept() \|\| next; # ALARM trickle us
296	dpavlin	42	my $request = <$client>;
297
298			warn "request $request\n" if $debug;
299
300			if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
301	dpavlin	43	my $path = $1;
302	dpavlin	42	my $param;
303	dpavlin	43	if ( $path =~ s{\?(.+)}{} ) {
304	dpavlin	42	foreach my $p ( split(/[&;]/, $1) ) {
305			my ($n,$v) = split(/=/, $p, 2);
306			$param->{$n} = $v;
307			}
308			warn "param: ",dump( $param ) if $debug;
309			}
310	dpavlin	43	get_request $client, $path, $param;
311	dpavlin	42	} else {
312			print $client "HTTP/1.0 500 No method\r\nConnection: close\r\nContent-type: text/plain\r\n\r\n500 $request";
313			warn "500 $request";
314			}
315
316	dpavlin	149	print $client menu() if $client->connected;
317	dpavlin	42
318			}
319
320			die "server died";
321			}
322
323	dpavlin	45	warn "loaded";
324
325	dpavlin	42	1;