1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
#!/usr/bin/perl
use Socket;
use Carp;
sub spawn; # forward declaration
sub logmsg { #print "$0 $$: @_ at ", scalar localtime, "\n"
}
my $port = shift || $ARGV[0];
my $proto = getprotobyname('tcp');
$port = $1 if $port =~ /(\d+)/; # untaint port number
socket(Server, PF_INET, SOCK_STREAM, $proto)|| die "socket: $!";
setsockopt(Server, SOL_SOCKET, SO_REUSEADDR,
pack("l", 1)) || die "setsockopt: $!";
bind(Server, sockaddr_in($port, INADDR_ANY))|| die "bind: $!";
listen(Server,SOMAXCONN) || die "listen: $!";
logmsg "server started on port $port";
open(PID, ">.server.pid");
print PID $$;
close(PID);
my $waitedpid = 0;
my $paddr;
sub REAPER {
$waitedpid = wait;
$SIG{CHLD} = \&REAPER; # loathe sysV
logmsg "reaped $waitedpid" . ($? ? " with exit $?" : '');
}
$SIG{CHLD} = \&REAPER;
for ( $waitedpid = 0;
($paddr = accept(Client,Server)) || $waitedpid;
$waitedpid = 0, close Client)
{
next if $waitedpid and not $paddr;
my($port,$iaddr) = sockaddr_in($paddr);
my $name = gethostbyaddr($iaddr,AF_INET);
logmsg "connection from $name [", inet_ntoa($iaddr), "] at port $port";
# this code is forked and run
spawn sub {
my ($request, $path, $ver, $left, $cl);
while(<STDIN>) {
if($_ =~ /(GET|POST|HEAD) (.*) HTTP\/1.(\d)/) {
$request=$1;
$path=$2;
$ver=$3;
}
elsif($_ =~ /^Content-Length: (\d*)/) {
$cl=$1;
}
push @headers, $_;
if($left > 0) {
$left -= length($_);
if($left == 0) {
$left = -1; # just to force a loop break here
}
}
# print STDERR "RCV ($left): $_";
if(!$left &&
($_ eq "\r\n") or ($_ eq "")) {
if($request eq "POST") {
$left=$cl;
}
else {
$left = -1; # force abort
}
}
if($left < 0) {
last;
}
}
if($path =~ /verifiedserver/) {
# this is a hard-coded query-string for the test script
# to verify that this is the server actually running!
print "HTTP/1.1 999 WE ROOLZ\r\n";
exit;
}
else {
#
# we always start the path with a number, this is the
# test number that this server will use to know what
# contents to pass back to the client
#
if($path =~ /.*\/(\d*)/) {
$testnum=$1;
}
else {
print STDERR "UKNOWN TEST CASE\n";
exit;
}
open(INPUT, ">log/server.input");
for(@headers) {
print INPUT $_;
}
close(INPUT);
# send a reply to the client
open(DATA, "<data/reply$testnum.txt");
while(<DATA>) {
print $_;
}
close(DATA);
}
# print "Hello there, $name, it's now ", scalar localtime, "\r\n";
};
}
sub spawn {
my $coderef = shift;
unless (@_ == 0 && $coderef && ref($coderef) eq 'CODE') {
confess "usage: spawn CODEREF";
}
my $pid;
if (!defined($pid = fork)) {
logmsg "cannot fork: $!";
return;
} elsif ($pid) {
logmsg "begat $pid";
return; # I'm the parent
}
# else I'm the child -- go spawn
open(STDIN, "<&Client") || die "can't dup client to stdin";
open(STDOUT, ">&Client") || die "can't dup client to stdout";
## open(STDERR, ">&STDOUT") || die "can't dup stdout to stderr";
exit &$coderef();
}
|
