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package HTTPServer;
use strict;
use warnings;
use HTTP::Daemon;
use HTTP::Status;
use HTTP::Headers;
use HTTP::Response;
our @ISA=qw(HTTP::Daemon);
my $VERSION = 0.01;
my $CRLF = "\015\012"; # "\r\n" is not portable
my $log = undef;
sub run {
my ($self, $urls, $synch_callback) = @_;
my $initialized = 0;
while (1) {
if (!$initialized) {
$synch_callback->();
$initialized = 1;
}
my $con = $self->accept();
print STDERR "Accepted a new connection\n" if $log;
while (my $req = $con->get_request) {
#my $url_path = $req->url->path;
my $url_path = $req->url->as_string;
if ($url_path =~ m{/$}) { # append 'index.html'
$url_path .= 'index.html';
}
#if ($url_path =~ m{^/}) { # remove trailing '/'
# $url_path = substr ($url_path, 1);
#}
if ($log) {
print STDERR "Method: ", $req->method, "\n";
print STDERR "Path: ", $url_path, "\n";
print STDERR "Available URLs: ", "\n";
foreach my $key (keys %$urls) {
print STDERR $key, "\n";
}
}
if (exists($urls->{$url_path})) {
print STDERR "Serving requested URL: ", $url_path, "\n" if $log;
next unless ($req->method eq "HEAD" || $req->method eq "GET");
my $url_rec = $urls->{$url_path};
$self->send_response($req, $url_rec, $con);
} else {
print STDERR "Requested wrong URL: ", $url_path, "\n" if $log;
$con->send_error($HTTP::Status::RC_FORBIDDEN);
last;
}
}
print STDERR "Closing connection\n" if $log;
$con->close;
}
}
sub send_response {
my ($self, $req, $url_rec, $con) = @_;
# create response
my ($code, $msg, $headers);
my $send_content = ($req->method eq "GET");
if (exists $url_rec->{'auth_method'}) {
($send_content, $code, $msg, $headers) =
$self->handle_auth($req, $url_rec);
} elsif (!$self->verify_request_headers ($req, $url_rec)) {
($send_content, $code, $msg, $headers) =
('', 400, 'Mismatch on expected headers', {});
} else {
($code, $msg) = @{$url_rec}{'code', 'msg'};
$headers = $url_rec->{headers};
}
my $resp = HTTP::Response->new ($code, $msg);
print STDERR "HTTP::Response: \n", $resp->as_string if $log;
while (my ($name, $value) = each %{$headers}) {
# print STDERR "setting header: $name = $value\n";
$resp->header($name => $value);
}
print STDERR "HTTP::Response with headers: \n", $resp->as_string if $log;
if ($send_content) {
my $content = $url_rec->{content};
if (exists($url_rec->{headers}{"Content-Length"})) {
# Content-Length and length($content) don't match
# manually prepare the HTTP response
$con->send_basic_header($url_rec->{code}, $resp->message, $resp->protocol);
print $con $resp->headers_as_string($CRLF);
print $con $CRLF;
print $con $content;
next;
}
if ($req->header("Range") && !$url_rec->{'force_code'}) {
$req->header("Range") =~ m/bytes=(\d*)-(\d*)/;
my $content_len = length($content);
my $start = $1 ? $1 : 0;
my $end = $2 ? $2 : ($content_len - 1);
my $len = $2 ? ($2 - $start) : ($content_len - $start);
if ($len > 0) {
$resp->header("Accept-Ranges" => "bytes");
$resp->header("Content-Length" => $len);
$resp->header("Content-Range"
=> "bytes $start-$end/$content_len");
$resp->header("Keep-Alive" => "timeout=15, max=100");
$resp->header("Connection" => "Keep-Alive");
$con->send_basic_header(206,
"Partial Content", $resp->protocol);
print $con $resp->headers_as_string($CRLF);
print $con $CRLF;
print $con substr($content, $start, $len);
} else {
$con->send_basic_header(416, "Range Not Satisfiable",
$resp->protocol);
$resp->header("Keep-Alive" => "timeout=15, max=100");
$resp->header("Connection" => "Keep-Alive");
print $con $CRLF;
}
next;
}
# fill in content
$content = $self->_substitute_port($content) if defined $content;
$resp->content($content);
print STDERR "HTTP::Response with content: \n", $resp->as_string if $log;
}
$con->send_response($resp);
print STDERR "HTTP::Response sent: \n", $resp->as_string if $log;
}
# Generates appropriate response content based on the authentication
# status of the URL.
sub handle_auth {
my ($self, $req, $url_rec) = @_;
my ($send_content, $code, $msg, $headers);
# Catch failure to set code, msg:
$code = 500;
$msg = "Didn't set response code in handle_auth";
# Most cases, we don't want to send content.
$send_content = 0;
# Initialize headers
$headers = {};
my $authhdr = $req->header('Authorization');
# Have we sent the challenge yet?
unless ($url_rec->{auth_challenged} || $url_rec->{auth_no_challenge}) {
# Since we haven't challenged yet, we'd better not
# have received authentication (for our testing purposes).
if ($authhdr) {
$code = 400;
$msg = "You sent auth before I sent challenge";
} else {
# Send challenge
$code = 401;
$msg = "Authorization Required";
$headers->{'WWW-Authenticate'} = $url_rec->{'auth_method'}
. " realm=\"wget-test\"";
$url_rec->{auth_challenged} = 1;
}
} elsif (!defined($authhdr)) {
# We've sent the challenge; we should have received valid
# authentication with this one. A normal server would just
# resend the challenge; but since this is a test, wget just
# failed it.
$code = 400;
$msg = "You didn't send auth after I sent challenge";
if ($url_rec->{auth_no_challenge}) {
$msg = "--auth-no-challenge but no auth sent."
}
} else {
my ($sent_method) = ($authhdr =~ /^(\S+)/g);
unless ($sent_method eq $url_rec->{'auth_method'}) {
# Not the authorization type we were expecting.
$code = 400;
$msg = "Expected auth type $url_rec->{'auth_method'} but got "
. "$sent_method";
} elsif (($sent_method eq 'Digest'
&& &verify_auth_digest($authhdr, $url_rec, \$msg))
||
($sent_method eq 'Basic'
&& &verify_auth_basic($authhdr, $url_rec, \$msg))) {
# SUCCESSFUL AUTH: send expected message, headers, content.
($code, $msg) = @{$url_rec}{'code', 'msg'};
$headers = $url_rec->{headers};
$send_content = 1;
} else {
$code = 400;
}
}
return ($send_content, $code, $msg, $headers);
}
sub verify_auth_digest {
return undef; # Not yet implemented.
}
sub verify_auth_basic {
require MIME::Base64;
my ($authhdr, $url_rec, $msgref) = @_;
my $expected = MIME::Base64::encode_base64($url_rec->{'user'} . ':'
. $url_rec->{'passwd'}, '');
my ($got) = $authhdr =~ /^Basic (.*)$/;
if ($got eq $expected) {
return 1;
} else {
$$msgref = "Wanted ${expected} got ${got}";
return undef;
}
}
sub verify_request_headers {
my ($self, $req, $url_rec) = @_;
return 1 unless exists $url_rec->{'request_headers'};
for my $hdrname (keys %{$url_rec->{'request_headers'}}) {
my $rhdr = $req->header ($hdrname);
my $ehdr = $url_rec->{'request_headers'}{$hdrname};
unless (defined $rhdr && $rhdr =~ $ehdr) {
$rhdr = '' unless defined $rhdr;
print STDERR "\n*** Mismatch on $hdrname: $rhdr =~ $ehdr\n";
return undef;
}
}
return 1;
}
sub _substitute_port {
my $self = shift;
my $ret = shift;
$ret =~ s/{{port}}/$self->sockport/eg;
return $ret;
}
1;
# vim: et ts=4 sw=4
|
