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

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Revision 105 - (show annotations)
Fri Jul 31 23:22:05 2009 UTC (11 years, 5 months ago) by dpavlin
File size: 7040 byte(s)
better download progress with estimated time
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 $static_pids;
41
42 use Time::HiRes qw/time/;
43
44 sub static {
45 my ($client,$path) = @_;
46
47 my $full = "$server::base_dir/tftp/$path";
48
49 return if ! -f $full;
50
51 if ( my $pid = fork ) {
52 # parent
53 close($client);
54 print "http static child $pid\n";
55 $static_pids->{$pid} = $path;
56 return 1;
57 }
58
59 my $type = 'application/octet-stream';
60 $type = 'text/html' if $path =~ m{\.htm};
61 $type = 'application/javascript' if $path =~ m{\.js};
62 $type = 'text/plain' if $path =~ m{\.txt};
63
64 my $size = -s $full || return;
65
66 print $client "HTTP/1.0 200 OK\r\nContent-Type: $type\r\nContent-Length: $size\r\nConnection: close\r\n\r\n";
67
68 open(my $fh, $full);
69
70 my $block = 1400; # try not to fragment packages (pxelinux seems to have problems with it)
71 my $buff;
72 my $pos = 0;
73
74 STDERR->autoflush(1);
75 warn "static $path $type $size block: $block\n";
76
77 my $start_t = time();
78 my $last_t = $start_t;
79
80 while( my $len = read $fh, $buff, $block ) {
81 syswrite $client,$buff;
82 $client->flush;
83 $pos += $len;
84 my $t = time();
85 next unless $t - $last_t > 0.75;
86 $last_t = $t;
87 my $speed = ( $pos ) / ( $t - $start_t );
88 printf STDERR "%s %d/%d %.2f%% %.2f K/s ETA %.1fs\r"
89 , $path, $pos
90 , $size, $pos * 100 / $size
91 , $speed / 1024
92 , ( $size - $pos ) / $speed
93 ;
94 }
95 close($fh);
96 close($client);
97
98 print STDERR "\n";
99
100 exit;
101 }
102
103 use boolean;
104
105 use screen;
106 use kvm;
107
108 $SIG{CHLD} = 'IGNORE';
109
110 sub start_stop {
111 my $daemon = shift;
112 my $pid = $pids->{$daemon};
113
114 warn "start_stop $daemon $pid\n";
115
116 if ( $pid =~ m{^\d+$} ) {
117 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 $pids->{$daemon} = 'stopped';
122 return qq|$daemon pid $pid stopped|;
123 } else {
124 if ( $pid = fork ) {
125 # parent
126 $pids->{$daemon} = $pid;
127 warn "forked $daemon $pid\n";
128 return qq|$daemon pid $pid started|;
129 } elsif ( defined $pid ) {
130 # child
131 my $invoke = 'start';
132 $invoke = $1 if $daemon =~ s{/(.+)}{};
133 my $eval = $daemon . '::' . $invoke . '(' . ( @_ ? dump(@_) : '' ) . ')';
134 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 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 sub get_request {
148 my ( $client, $path, $param ) = @_;
149
150 warn "get_request $path ", $param ? dump( $param ) : '', "\n";
151
152 if ( my $found = static( $client,$path ) ) {
153 warn "static $found" if $debug;
154 } elsif ( $path eq '/' ) {
155
156 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
160 my @rows = (
161 'ip', html::tt( $server::ip ),
162 'netmask', html::tt( $server::netmask ),
163
164 'debug', qq|<a href=/our/debug/| . boolean::toggle($debug) . qq|>$debug</a>|,
165 );
166
167 my $debug_proc = '';
168
169 warn 'pids: ', dump( $pids ) if $debug;
170 foreach my $name ( sort keys %$pids ) {
171 my $pid = $pids->{$name} || next;
172
173 my $html = qq|<a href=/start_stop/$name>$pid</a>|;
174
175 my $proc = "/proc/$pid/status";
176
177 if ( -e $proc ) {
178 if ( $debug ) {
179 $html .= qq| <a name=$pid href=#proc-$pid>?</a>|;
180
181 $debug_proc
182 .= qq|<a name=proc-$pid href=#$pid>$proc</a><pre style="font-size: 10%">|
183 . read_file($proc)
184 . qq|</pre>|
185 ;
186 }
187
188 if ( $name->can('start_fork') ) {
189 $html .= qq| <a href=/start_stop/kvm/$_>$_</a>| foreach $name->start_fork;
190 }
191
192 if ( $name->can('actions') ) {
193 $html .= qq| <a href=/action/kvm/$_>$_</a>| foreach $name->actions;
194 }
195 }
196
197 push @rows, ( $name => $html );
198 }
199
200 my $below_table = '';
201
202 warn 'static_pids: ', dump( $static_pids ) if $debug;
203 foreach my $pid ( keys %$static_pids ) {
204 my $path = $static_pids->{$pid};
205 if ( -d "/proc/$pid" ) {
206 push @rows, ( $path => qq|<a href=/kill/static/$pid>$pid</a>| );
207 } elsif ( $param->{clean_completed_downloads} ) {
208 delete $static_pids->{$pid}
209 } else {
210 push @rows, ( $path => "$pid competed" );
211 $below_table = qq|<a href="/?clean_completed_downloads=1">clean completed downloads</a>|;
212 }
213 }
214
215 print $client $ok
216 , html::table( 2, @rows )
217 , $below_table
218 , html::tabs( log::mac_changes )
219 , $debug_proc
220 ;
221
222 } elsif ( $path =~ m{^/our/(\w+)/(\S+)} ) {
223 eval 'our $' . $1 . ' = ' . $2;
224 warn $@ if $@;
225 print $client $redirect, qq|<big>$1 = $2</big><br>Location: <a href="$url">$url</a>|;
226 server::debug( $debug ) if $1 eq 'debug';
227 } elsif ( $path =~ m{^/start_stop/((?:screen|kvm).*)} ) { # XXX we don't want to stop all classes
228 print $client $redirect, start_stop($1);
229 } elsif ( $path =~ m{^/action/([^/]+)/(.+)} ) {
230 $1->$2();
231 print $client $redirect;
232 } elsif ( $path =~ m{^/kill/static/(\d+)} ) {
233 print $client $redirect;
234 kill 1, $1 || kill 9, $2 && warn "killed $1";
235 } elsif ( $path eq '/exit' ) {
236 # DESTROY;
237 exit 0;
238 } elsif ( $path =~ m{/boot} ) {
239 print $client qq{$ok
240 #!gpxe
241 imgfree
242 login
243 chain http://$server::ip:$httpd::port/
244
245 };
246 } else {
247 print $client "HTTP/1.0 404 $path\r\nConnection: close\r\nContent-type: text/html\r\n\r\n<big>404 $path</big>";
248 warn "404 $path";
249 }
250
251 }
252
253 use browser;
254
255 sub start {
256
257 my $server = IO::Socket::INET->new(
258 Proto => 'tcp',
259 LocalPort => $httpd::port,
260 Listen => SOMAXCONN,
261 Reuse => 1
262 ) || die "can't start server on $url: $!";
263
264 print "url $url\n";
265
266 start_stop 'browser', $url;
267 start_stop 'screen';
268 start_stop 'kvm';
269
270 while (my $client = $server->accept()) {
271 $client->autoflush(1);
272 my $request = <$client>;
273
274 warn "request $request\n" if $debug;
275
276 Module::Refresh->refresh;
277
278 if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
279 my $path = $1;
280 my $param;
281 if ( $path =~ s{\?(.+)}{} ) {
282 foreach my $p ( split(/[&;]/, $1) ) {
283 my ($n,$v) = split(/=/, $p, 2);
284 $param->{$n} = $v;
285 }
286 warn "param: ",dump( $param ) if $debug;
287 }
288 get_request $client, $path, $param;
289 } else {
290 print $client "HTTP/1.0 500 No method\r\nConnection: close\r\nContent-type: text/plain\r\n\r\n500 $request";
291 warn "500 $request";
292 }
293
294 print $client qq{
295 <div style="font-size: 80%; color: #888">
296 <a href="">reload</a>
297 <a href=/>index</a>
298 <a href=/exit>exit</a>
299 </div>
300 } if $client->connected;
301
302 }
303
304 die "server died";
305 }
306
307 warn "loaded";
308
309 1;

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