/[pxelator]/lib/PXElator/httpd.pm
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Contents of /lib/PXElator/httpd.pm

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Revision 77 - (show annotations)
Fri Jul 31 14:42:45 2009 UTC (11 years, 5 months ago) by dpavlin
File size: 5935 byte(s)
kill using pstree from children to parent
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 use Module::Refresh;
21
22 our $pids;
23 $pids = { httpd => $$ } unless defined $pids; # keep pids on refresh
24
25 sub DESTROY {
26 warn "pids ",dump( $pids );
27 foreach ( values %$pids ) {
28 warn "kill $_";
29 kill 1,$_ || kill 9, $_;
30 }
31 }
32
33 our $port = 7777;
34
35 use server;
36 our $debug = server::debug;
37 our $url = "http://$server::ip:$port";
38
39 use html;
40 our $static_pids;
41
42 sub static {
43 my ($client,$path) = @_;
44
45 my $full = "$server::base_dir/tftp/$path";
46
47 return if ! -f $full;
48
49 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 my $type = 'application/octet-stream';
58 $type = 'text/html' if $path =~ m{\.htm};
59 $type = 'application/javascript' if $path =~ m{\.js};
60 $type = 'text/plain' if $path =~ m{\.txt};
61
62 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 print "static $path $type $size\n";
68
69 my $block = 8192;
70 my $buff;
71 my $pos = 0;
72
73 while( my $len = read $fh, $buff, $block ) {
74 print $client $buff;
75 $pos += $len;
76 printf "%s %d/%d %.2f%%\r", $path, $pos, $size, $pos * 100 / $size;
77 }
78 close($fh);
79 close($client);
80
81 print "$path $pos == $size OK\n";
82
83 exit;
84 }
85
86 use boolean;
87
88 use screen;
89 use kvm;
90
91 $SIG{CHLD} = 'IGNORE';
92
93 sub start_stop {
94 my $daemon = shift;
95 my $pid = $pids->{$daemon};
96
97 warn "start_stop $daemon $pid pids: ",dump( $pids );
98
99 if ( $pid =~ m{^\d+$} ) {
100 my $pstree = `pstree -p $pid`;
101 my @pids = $pstree =~ m{\((\d+)\)}g;
102 warn "pstree $pstree pids ",dump( @pids );
103 kill 1, $_ foreach reverse @pids;
104 $pids->{$daemon} = 'stopped';
105 return qq|$daemon pid $pid stopped|;
106 } else {
107 if ( $pid = fork ) {
108 # parent
109 $pids->{$daemon} = $pid;
110 warn "forked $daemon $pid";
111 return qq|$daemon pid $pid started|;
112 } elsif ( defined $pid ) {
113 # child
114 my $eval = $daemon . '::start(' . ( @_ ? dump(@_) : '' ) . ')';
115 warn "eval $eval";
116 eval $eval;
117 warn "can't start $daemon: $@" if $@;
118 exit;
119 } else {
120 die "fork error $!";
121 }
122 }
123 }
124
125 my $ok = qq|HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n|;
126 my $redirect = qq|HTTP/1.1 302 Found\r\nContent-type: text/html\r\nLocation: $url\r\n\r\n|;
127
128 sub get_request {
129 my ( $client, $path, $param ) = @_;
130
131 warn "get_request $client $path ",dump( $param );
132
133 if ( my $found = static( $client,$path ) ) {
134 warn "static $found" if $debug;
135 } elsif ( $path eq '/' ) {
136
137 my $screen = $pids->{screen} ? qq|stop <tt>$pids->{screen}</tt>| : 'start';
138 my $kvm = $pids->{kvm} ? qq|stop <tt>$pids->{kvm}</tt>| :
139 $pids->{screen} ? qq|start| : qq|start screen first|;
140
141 my @rows = (
142 'ip', html::tt( $server::ip ),
143 'netmask', html::tt( $server::netmask ),
144
145 'debug', qq|<a href=/our/debug/| . boolean::toggle($debug) . qq|>$debug</a>|,
146 );
147
148 my $debug_proc;
149
150 warn 'pids: ', dump( $pids );
151 foreach my $name ( keys %$pids ) {
152 my $pid = $pids->{$name} || next;
153
154 my $html = qq|<a href=/$name>$pid</a>|;
155
156 if ( $debug ) {
157 $html .= qq| <a name=$pid href=#proc-$pid>?</a>|;
158
159 my $proc = "/proc/$pid/status";
160 $debug_proc
161 .= qq|<a name=proc-$pid href=#$pid>$proc</a><pre style="font-size: 10%">|
162 . read_file($proc)
163 . qq|</pre>|
164 if -e $proc;
165 }
166
167 push @rows, ( $name => $html );
168 }
169
170 warn 'static_pids: ', dump( $static_pids );
171 foreach my $pid ( keys %$static_pids ) {
172 my $path = $static_pids->{$pid};
173 if ( -d "/proc/$pid" ) {
174 push @rows, ( $path => qq|<a href=/kill/static/$pid>$pid</a>| );
175 } else {
176 push @rows, ( $path => "$pid competed" );
177 }
178 }
179
180 print $client $ok
181 , html::table( 2, @rows )
182 , html::tabs( log::mac_changes )
183 , $debug_proc
184 ;
185
186 } elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
187 eval 'our $' . $1 . ' = ' . $2;
188 warn $@ if $@;
189 print $client $redirect, qq|<big>$1 = $2</big><br>Location: <a href="$url">$url</a>|;
190 server::debug( $debug ) if $1 eq 'debug';
191 } elsif ( $path =~ m{^/(screen|kvm)} ) {
192 print $client $redirect, start_stop($1);
193 } elsif ( $path =~ m{^/kill/static/(\d+)} ) {
194 print $client $redirect;
195 kill 9, $1 && warn "killed $1";
196 } elsif ( $path eq '/exit' ) {
197 # DESTROY;
198 exit 0;
199 } elsif ( $path =~ m{/boot} ) {
200 print $client qq{$ok
201 #!gpxe
202 imgfree
203 login
204 chain http://$server::ip:$httpd::port/
205
206 };
207 } else {
208 print $client "HTTP/1.0 404 $path\r\nConnection: close\r\nContent-type: text/html\r\n\r\n<big>404 $path</big>";
209 warn "404 $path";
210 }
211
212 }
213
214 use browser;
215
216 sub start {
217
218 my $server = IO::Socket::INET->new(
219 Proto => 'tcp',
220 LocalPort => $httpd::port,
221 Listen => SOMAXCONN,
222 Reuse => 1
223 ) || die "can't start server on $url: $!";
224
225 print "url $url\n";
226
227 start_stop 'browser', $url;
228 start_stop 'screen';
229 start_stop 'kvm';
230
231 while (my $client = $server->accept()) {
232 $client->autoflush(1);
233 my $request = <$client>;
234
235 warn "request $request\n" if $debug;
236
237 Module::Refresh->refresh;
238
239 if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
240 my $path = $1;
241 my $param;
242 if ( $path =~ s{\?(.+)}{} ) {
243 foreach my $p ( split(/[&;]/, $1) ) {
244 my ($n,$v) = split(/=/, $p, 2);
245 $param->{$n} = $v;
246 }
247 warn "param: ",dump( $param ) if $debug;
248 }
249 warn "path $path param: ",dump( $param );
250 get_request $client, $path, $param;
251 } else {
252 print $client "HTTP/1.0 500 No method\r\nConnection: close\r\nContent-type: text/plain\r\n\r\n500 $request";
253 warn "500 $request";
254 }
255
256 print $client qq{
257 <div style="font-size: 80%; color: #888">
258 <a href="">reload</a>
259 <a href=/>index</a>
260 <a href=/exit>exit</a>
261 </div>
262 } if $client->connected;
263
264 }
265
266 die "server died";
267 }
268
269 warn "loaded";
270
271 1;

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