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#!/usr/bin/perl -w
###----------------------------------------###
### httpd server class ###
###----------------------------------------###
use base qw(Net::Server::Single);
use strict;
@ARGV == 3 or die "usage: simple-httpd <document root> <log dir> <port>\n";
my ($DOCUMENT_ROOT, $SERVER_ROOT, $PORT) = @ARGV;
### run the server
__PACKAGE__->run;
exit;
###----------------------------------------------------------------###
### set up some server parameters
sub configure_hook {
my $self = shift;
my $root = $self->{server_root} = $SERVER_ROOT;
$self->{server}->{port} = "*:$PORT"; # port and addr to bind
$self->{server}->{user} = 'nobody'; # user to run as
$self->{server}->{group} = 'nogroup'; # group to run as
$self->{server}->{setsid} = 1; # daemonize
$self->{server}->{log_file} = "$root/server.log";
$self->{document_root} = $DOCUMENT_ROOT;
$self->{access_log} = "$root/access.log";
$self->{error_log} = "$root/error.log";
$self->{default_index} = [ qw(index.html index.htm main.htm) ];
$self->{mime_types} = {
html => 'text/html',
htm => 'text/html',
gif => 'image/gif',
jpg => 'image/jpeg',
};
$self->{mime_default} = 'text/plain';
}
sub post_configure_hook {
my $self = shift;
open(STDERR, ">>". $self->{error_log}) || die "Couldn't open STDERR: $!";
open(ACCESS, ">>". $self->{access_log}) || die "Couldn't open ACCESS: $!";
my $old = select ACCESS;
$| = 1;
select STDERR;
$| = 1;
select $old;
}
### process the request
sub process_request {
my $self = shift;
local %ENV = ();
local $self->{needs_header} = 1;
### read the first line of response
my $line = <STDIN> || return $self->error(400, "No Data");
$line =~ s/[\r\n]+$//;
if ($line !~ /^ (\w+) \ + (\S+) \ + (HTTP\/[01].\d) $ /x) {
return $self->error(400, "Bad request $line");
}
my ($method, $req, $protocol) = ($1, $2, $3);
print ACCESS join(" ", time, $method, $req)."\n";
### read in other headers
$self->read_headers || return $self->error(400, "Strange headers");
### do we support the type
if ($method !~ /GET|POST|HEAD/) {
return $self->error(400, "Unsupported Method");
}
$ENV{REQUEST_METHOD} = $method;
### can we read that request
if ($req !~ m|^ (?:http://[^/]+)? (.*) $|x) {
return $self->error(400, "Malformed URL");
}
$ENV{REQUEST_URI} = $1;
### parse out the uri and query string
my $uri = '';
$ENV{QUERY_STRING} = '';
if ($ENV{REQUEST_URI} =~ m|^ ([^\?]+) (?:\?(.+))? $|x) {
$ENV{QUERY_STRING} = defined($2) ? $2 : '';
$uri = $1;
}
### clean up uri
if ($uri =~ /[\ \;]/) {
return $self->error(400, "Malformed URL");
}
$uri =~ s/%(\w\w)/chr(hex($1))/eg;
1 while $uri =~ s|^\.\./+||; # can't go below doc root
### at this point the uri should be ready to use
$uri = "$self->{document_root}$uri";
### see if there's an index page
if (-d $uri) {
foreach (@{ $self->{default_index} }){
if (-e "$uri/$_") {
$uri = "$uri/$_";
last;
}
}
}
### error 404
if (! -e $uri) {
return $self->error(404, "file not found");
### directory listing
} elsif (-d $uri) {
### need work on this
print $self->content_type('text/html'),"\r\n";
print "Directory listing not supported";
}
### spit it out
open(my $fh, "<$uri") || return $self->error(500, "Can't open file [$!]");
my ($type) = $uri =~ /([^\.]+)$/;
$type = $self->{mime_types}->{$type} || $self->{mime_default};
print $self->status(200), $self->content_type($type), "\r\n";
print STDOUT $_ while read $fh, $_, 8192;
close $fh;
}
sub read_headers {
my $self = shift;
$self->{headers} = {};
while (defined($_ = <STDIN>)) {
s/[\r\n]+$//;
last unless length $_;
return 0 if ! /^ ([\w\-]+) :[\ \t]+ (.+) $/x;
my $key = "HTTP_" . uc($1);
$key =~ tr/-/_/;
$self->{headers}->{$key} = $2;
}
return 1;
}
sub content_type {
my ($self, $type) = @_;
$self->http_header;
return "Content-type: $type\r\n";
}
sub error{
my ($self, $number, $msg) = @_;
print $self->status($number, $msg), "\r\n";
warn "Error - $number - $msg\n";
}
sub status {
my ($self, $number, $msg) = @_;
$msg = '' if ! defined $msg;
return if $self->http_header($number);
return "Status $number: $msg\r\n";
}
sub http_header {
my $self = shift;
my $number = shift || 200;
return if ! delete $self->{needs_header};
print "HTTP/1.0 $number\r\n";
return 1;
}
1;
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