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	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			</div>
27
28			}}
29
30	dpavlin	70	our $pids;
31			$pids = { httpd => $$ } unless defined $pids; # keep pids on refresh
32	dpavlin	66
33			sub DESTROY {
34			warn "pids ",dump( $pids );
35			foreach ( values %$pids ) {
36			warn "kill $_";
37			kill 1,$_ \|\| kill 9, $_;
38			}
39			}
40
41	dpavlin	42	our $port = 7777;
42
43			use server;
44	dpavlin	67	our $debug = server::debug;
45	dpavlin	64	our $url = "http://$server::ip:$port";
46	dpavlin	42
47	dpavlin	43	use html;
48	dpavlin	70	our $static_pids;
49	dpavlin	115	use progress_bar;
50	dpavlin	43
51	dpavlin	42	sub static {
52			my ($client,$path) = @_;
53
54	dpavlin	65	my $full = "$server::base_dir/tftp/$path";
55	dpavlin	42
56	dpavlin	65	return if ! -f $full;
57	dpavlin	42
58	dpavlin	70	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	dpavlin	65	my $type = 'application/octet-stream';
67	dpavlin	42	$type = 'text/html' if $path =~ m{\.htm};
68			$type = 'application/javascript' if $path =~ m{\.js};
69	dpavlin	65	$type = 'text/plain' if $path =~ m{\.txt};
70	dpavlin	42
71	dpavlin	65	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	dpavlin	96	my $block = 1400; # try not to fragment packages (pxelinux seems to have problems with it)
78	dpavlin	65	my $buff;
79			my $pos = 0;
80
81	dpavlin	105	warn "static $path $type $size block: $block\n";
82	dpavlin	96
83	dpavlin	115	progress_bar::start;
84	dpavlin	105
85	dpavlin	65	while( my $len = read $fh, $buff, $block ) {
86	dpavlin	107	print $client $buff;
87	dpavlin	105	$client->flush;
88	dpavlin	65	$pos += $len;
89	dpavlin	115	progress_bar::tick( $path, $pos, $size );
90	dpavlin	42	}
91	dpavlin	65	close($fh);
92			close($client);
93	dpavlin	42
94	dpavlin	105	print STDERR "\n";
95	dpavlin	65
96	dpavlin	107	warn "exit static child";
97
98			exit(0);
99	dpavlin	42	}
100
101	dpavlin	43	use boolean;
102	dpavlin	57
103	dpavlin	53	use screen;
104	dpavlin	57	use kvm;
105	dpavlin	42
106	dpavlin	57	$SIG{CHLD} = 'IGNORE';
107
108			sub start_stop {
109			my $daemon = shift;
110	dpavlin	136	my $pid = $pids->{$daemon} \|\| 'not started';
111	dpavlin	57
112	dpavlin	96	warn "start_stop $daemon $pid\n";
113	dpavlin	57
114	dpavlin	67	if ( $pid =~ m{^\d+$} ) {
115	dpavlin	77	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	dpavlin	66	$pids->{$daemon} = 'stopped';
120	dpavlin	57	return qq\|$daemon pid $pid stopped\|;
121			} else {
122			if ( $pid = fork ) {
123			# parent
124			$pids->{$daemon} = $pid;
125	dpavlin	96	warn "forked $daemon $pid\n";
126	dpavlin	57	return qq\|$daemon pid $pid started\|;
127			} elsif ( defined $pid ) {
128			# child
129	dpavlin	81	my $invoke = 'start';
130			$invoke = $1 if $daemon =~ s{/(.+)}{};
131			my $eval = $daemon . '::' . $invoke . '(' . ( @_ ? dump(@_) : '' ) . ')';
132	dpavlin	57	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	dpavlin	67	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	dpavlin	43	sub get_request {
146			my ( $client, $path, $param ) = @_;
147
148	dpavlin	128	server->refresh;
149
150	dpavlin	96	warn "get_request $path ", $param ? dump( $param ) : '', "\n";
151	dpavlin	43
152			if ( my $found = static( $client,$path ) ) {
153			warn "static $found" if $debug;
154			} elsif ( $path eq '/' ) {
155	dpavlin	53
156	dpavlin	57	my $screen = $pids->{screen} ? qq\|stop <tt>$pids->{screen}</tt>\| : 'start';
157			my $kvm = $pids->{kvm} ? qq\|stop <tt>$pids->{kvm}</tt>\| :
158			$pids->{screen} ? qq\|start\| : qq\|start screen first\|;
159	dpavlin	53
160	dpavlin	66	my @rows = (
161	dpavlin	64	'debug', qq\|<a href=/our/debug/\| . boolean::toggle($debug) . qq\|>$debug</a>\|,
162	dpavlin	43	);
163	dpavlin	70
164	dpavlin	96	my $debug_proc = '';
165	dpavlin	71
166	dpavlin	78	warn 'pids: ', dump( $pids ) if $debug;
167	dpavlin	87	foreach my $name ( sort keys %$pids ) {
168	dpavlin	66	my $pid = $pids->{$name} \|\| next;
169	dpavlin	43
170	dpavlin	89	my $html = qq\|<a href=/start_stop/$name>$pid</a>\|;
171	dpavlin	66
172	dpavlin	81	my $proc = "/proc/$pid/status";
173	dpavlin	71
174	dpavlin	81	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	dpavlin	88	if ( $name->can('start_fork') ) {
186			$html .= qq\| <a href=/start_stop/kvm/$_>$_</a>\| foreach $name->start_fork;
187	dpavlin	81	}
188	dpavlin	88
189			if ( $name->can('actions') ) {
190			$html .= qq\| <a href=/action/kvm/$_>$_</a>\| foreach $name->actions;
191			}
192	dpavlin	71	}
193
194	dpavlin	66	push @rows, ( $name => $html );
195			}
196
197	dpavlin	91	my $below_table = '';
198
199	dpavlin	78	warn 'static_pids: ', dump( $static_pids ) if $debug;
200	dpavlin	70	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	dpavlin	91	} elsif ( $param->{clean_completed_downloads} ) {
205			delete $static_pids->{$pid}
206	dpavlin	70	} else {
207			push @rows, ( $path => "$pid competed" );
208	dpavlin	91	$below_table = qq\|<a href="/?clean_completed_downloads=1">clean completed downloads</a>\|;
209	dpavlin	70	}
210			}
211
212	dpavlin	72	print $client $ok
213	dpavlin	149	, menu()
214	dpavlin	72	, html::table( 2, @rows )
215	dpavlin	91	, $below_table
216	dpavlin	72	, html::tabs( log::mac_changes )
217			, $debug_proc
218			;
219	dpavlin	66
220	dpavlin	149	} 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	dpavlin	43	} elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
226			eval 'our $' . $1 . ' = ' . $2;
227			warn $@ if $@;
228	dpavlin	67	print $client $redirect, qq\|<big>$1 = $2</big><br>Location: <a href="$url">$url</a>\|;
229			server::debug( $debug ) if $1 eq 'debug';
230	dpavlin	89	} elsif ( $path =~ m{^/start_stop/((?:screen\|kvm).*)} ) { # XXX we don't want to stop all classes
231	dpavlin	67	print $client $redirect, start_stop($1);
232	dpavlin	88	} elsif ( $path =~ m{^/action/([^/]+)/(.+)} ) {
233			$1->$2();
234			print $client $redirect;
235	dpavlin	70	} elsif ( $path =~ m{^/kill/static/(\d+)} ) {
236			print $client $redirect;
237	dpavlin	86	kill 1, $1 \|\| kill 9, $2 && warn "killed $1";
238	dpavlin	66	} elsif ( $path eq '/exit' ) {
239			# DESTROY;
240			exit 0;
241	dpavlin	43	} 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	dpavlin	53
256	dpavlin	66	use browser;
257	dpavlin	140	use network;
258	dpavlin	66
259	dpavlin	42	sub start {
260
261	dpavlin	140	warn 'tap ', network::tap();
262
263	dpavlin	42	my $server = IO::Socket::INET->new(
264			Proto => 'tcp',
265			LocalPort => $httpd::port,
266			Listen => SOMAXCONN,
267			Reuse => 1
268	dpavlin	43	) \|\| die "can't start server on $url: $!";
269	dpavlin	42
270			print "url $url\n";
271
272	dpavlin	66	start_stop 'browser', $url;
273			start_stop 'screen';
274			start_stop 'kvm';
275	dpavlin	42
276	dpavlin	118	while (1) {
277			my $client = $server->accept() \|\| next; # ALARM trickle us
278	dpavlin	42	my $request = <$client>;
279
280			warn "request $request\n" if $debug;
281
282			if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
283	dpavlin	43	my $path = $1;
284	dpavlin	42	my $param;
285	dpavlin	43	if ( $path =~ s{\?(.+)}{} ) {
286	dpavlin	42	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	dpavlin	43	get_request $client, $path, $param;
293	dpavlin	42	} 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	dpavlin	149	print $client menu() if $client->connected;
299	dpavlin	42
300			}
301
302			die "server died";
303			}
304
305	dpavlin	45	warn "loaded";
306
307	dpavlin	42	1;