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;

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};

        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 ) = @_;

        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 = (
                        'ip',           html::tt( $server::ip ),
                        'netmask',      html::tt( $server::netmask ),

                        '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
                        , html::table( 2, @rows )
                        , $below_table
                        , html::tabs( log::mac_changes )
                        , $debug_proc
                        ;

        } 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;

sub start {

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