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

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Revision 66 - (hide annotations)
Thu Jul 30 20:15:39 2009 UTC (14 years, 8 months ago) by dpavlin
File size: 4833 byte(s)
turn httpd server into real process manager which starts other components

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 dpavlin 43 use Module::Refresh;
21 dpavlin 42
22 dpavlin 66 our $pids = { httpd => $$ };
23    
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 dpavlin 66 our $debug = 0;
34 dpavlin 42
35     use server;
36 dpavlin 64 our $url = "http://$server::ip:$port";
37 dpavlin 42
38 dpavlin 43 use html;
39    
40 dpavlin 42 sub static {
41     my ($client,$path) = @_;
42    
43 dpavlin 65 my $full = "$server::base_dir/tftp/$path";
44 dpavlin 42
45 dpavlin 65 return if ! -f $full;
46 dpavlin 42
47 dpavlin 65 my $type = 'application/octet-stream';
48 dpavlin 42 $type = 'text/html' if $path =~ m{\.htm};
49     $type = 'application/javascript' if $path =~ m{\.js};
50 dpavlin 65 $type = 'text/plain' if $path =~ m{\.txt};
51 dpavlin 42
52 dpavlin 65 my $size = -s $full || return;
53    
54     print $client "HTTP/1.0 200 OK\r\nContent-Type: $type\r\nContent-Length: $size\r\nConnection: close\r\n\r\n";
55    
56     open(my $fh, $full);
57     print "static $path $type $size\n";
58    
59     my $block = 8192;
60     my $buff;
61     my $pos = 0;
62    
63     while( my $len = read $fh, $buff, $block ) {
64     print $client $buff;
65     $pos += $len;
66     printf "%s %d/%d %.2f%%\r", $path, $pos, $size, $pos * 100 / $size;
67 dpavlin 42 }
68 dpavlin 65 close($fh);
69     close($client);
70 dpavlin 42
71 dpavlin 65 print "$path $pos == $size OK\n";
72    
73 dpavlin 42 return $path;
74     }
75    
76     my $ok = "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n";
77    
78 dpavlin 43 use boolean;
79 dpavlin 57
80 dpavlin 53 use screen;
81 dpavlin 57 use kvm;
82 dpavlin 42
83 dpavlin 57 $SIG{CHLD} = 'IGNORE';
84    
85     sub start_stop {
86     my $daemon = shift;
87     my $pid = $pids->{$daemon};
88    
89     warn "start_stop $daemon pids: ",dump( $pids );
90    
91     if ( $pid ) {
92     warn "kill 9 $pid";
93     kill 9, $pid;
94 dpavlin 66 $pids->{$daemon} = 'stopped';
95 dpavlin 57 return qq|$daemon pid $pid stopped|;
96     } else {
97     if ( $pid = fork ) {
98     # parent
99     $pids->{$daemon} = $pid;
100     warn "forked $daemon $pid";
101     return qq|$daemon pid $pid started|;
102     } elsif ( defined $pid ) {
103     # child
104 dpavlin 66 my $eval = $daemon . '::start(' . dump(@_) . ')';
105 dpavlin 57 warn "eval $eval";
106     eval $eval;
107     warn "can't start $daemon: $@" if $@;
108     exit;
109     } else {
110     die "fork error $!";
111     }
112     }
113     }
114    
115 dpavlin 43 sub get_request {
116     my ( $client, $path, $param ) = @_;
117    
118 dpavlin 53 warn "get_request $client $path ",dump( $param );
119 dpavlin 43
120     if ( my $found = static( $client,$path ) ) {
121     warn "static $found" if $debug;
122     } elsif ( $path eq '/' ) {
123 dpavlin 53
124 dpavlin 57 my $screen = $pids->{screen} ? qq|stop <tt>$pids->{screen}</tt>| : 'start';
125     my $kvm = $pids->{kvm} ? qq|stop <tt>$pids->{kvm}</tt>| :
126     $pids->{screen} ? qq|start| : qq|start screen first|;
127 dpavlin 53
128 dpavlin 66 my @rows = (
129 dpavlin 64 'ip', html::tt( $server::ip ),
130     'netmask', html::tt( $server::netmask ),
131 dpavlin 66
132 dpavlin 64 'debug', qq|<a href=/our/debug/| . boolean::toggle($debug) . qq|>$debug</a>|,
133 dpavlin 43 );
134 dpavlin 66 foreach my $name ( %$pids ) {
135     my $pid = $pids->{$name} || next;
136 dpavlin 43
137 dpavlin 66 my $html = qq|<a href=/$name>$pid</a>|;
138     $html .= qq|<pre style="font-size: 10%">|
139     . ( $debug ? read_file("/proc/$pid/status") : '' )
140     . qq|</pre>| if $debug;
141    
142     push @rows, ( $name => $html );
143     }
144    
145     print $client $ok, html::table( 2, @rows );
146    
147 dpavlin 43 } elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
148     eval 'our $' . $1 . ' = ' . $2;
149     warn $@ if $@;
150     print $client qq|HTTP/1.1 302 Found\r\nLocation: $url\r\nContent-type: text/html\r\n\r\n<big>$1 = $2</big><br>Location: <a href="$url">$url</a>|;
151 dpavlin 57 } elsif ( $path =~ m{^/(screen|kvm)} ) {
152     print $client $ok, start_stop($1);
153 dpavlin 66 } elsif ( $path eq '/exit' ) {
154     # DESTROY;
155     exit 0;
156 dpavlin 43 } elsif ( $path =~ m{/boot} ) {
157     print $client qq{$ok
158     #!gpxe
159     imgfree
160     login
161     chain http://$server::ip:$httpd::port/
162    
163     };
164     } else {
165     print $client "HTTP/1.0 404 $path\r\nConnection: close\r\nContent-type: text/html\r\n\r\n<big>404 $path</big>";
166     warn "404 $path";
167     }
168    
169     }
170 dpavlin 53
171 dpavlin 66 use browser;
172    
173 dpavlin 42 sub start {
174    
175     my $server = IO::Socket::INET->new(
176     Proto => 'tcp',
177     LocalPort => $httpd::port,
178     Listen => SOMAXCONN,
179     Reuse => 1
180 dpavlin 43 ) || die "can't start server on $url: $!";
181 dpavlin 42
182     print "url $url\n";
183    
184 dpavlin 66 start_stop 'browser', $url;
185     start_stop 'screen';
186     start_stop 'kvm';
187 dpavlin 42
188     while (my $client = $server->accept()) {
189     $client->autoflush(1);
190     my $request = <$client>;
191    
192     warn "request $request\n" if $debug;
193    
194 dpavlin 43 Module::Refresh->refresh;
195    
196 dpavlin 42 if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
197 dpavlin 43 my $path = $1;
198 dpavlin 42 my $param;
199 dpavlin 43 if ( $path =~ s{\?(.+)}{} ) {
200 dpavlin 42 foreach my $p ( split(/[&;]/, $1) ) {
201     my ($n,$v) = split(/=/, $p, 2);
202     $param->{$n} = $v;
203     }
204     warn "param: ",dump( $param ) if $debug;
205     }
206 dpavlin 43 warn "path $path param: ",dump( $param );
207     get_request $client, $path, $param;
208 dpavlin 42 } else {
209     print $client "HTTP/1.0 500 No method\r\nConnection: close\r\nContent-type: text/plain\r\n\r\n500 $request";
210     warn "500 $request";
211     }
212    
213     print $client qq{
214 dpavlin 43 <div style="font-size: 80%; color: #888">
215     <a href="">reload</a>
216 dpavlin 66 <a href=/>index</a>
217     <a href=/exit>exit</a>
218 dpavlin 43 </div>
219     } if $client->connected;
220 dpavlin 42
221     }
222    
223     die "server died";
224     }
225    
226 dpavlin 45 warn "loaded";
227    
228 dpavlin 42 1;

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