package LWP::Protocol::http;

use strict;

require LWP::Debug;
require HTTP::Response;
require HTTP::Status;
require Net::HTTP;

use vars qw(@ISA @EXTRA_SOCK_OPTS);

require LWP::Protocol;
@ISA = qw(LWP::Protocol);

my $CRLF = "\015\012";

sub _new_socket
{
    my($self, $host, $port, $timeout) = @_;
    my $conn_cache = $self->{ua}{conn_cache};
    if ($conn_cache) {
	if (my $sock = $conn_cache->withdraw("http", "$host:$port")) {
	    return $sock if $sock && !$sock->can_read(0);
	    # if the socket is readable, then either the peer has closed the
	    # connection or there are some garbage bytes on it.  In either
	    # case we abandon it.
	    $sock->close;
	}
    }

    local($^W) = 0;  # IO::Socket::INET can be noisy
    my $sock = $self->socket_class->new(PeerAddr => $host,
					PeerPort => $port,
					Proto    => 'tcp',
					Timeout  => $timeout,
					KeepAlive => !!$conn_cache,
					SendTE    => 1,
					$self->_extra_sock_opts($host, $port),
				       );

    unless ($sock) {
	# IO::Socket::INET leaves additional error messages in $@
	$@ =~ s/^.*?: //;
	die "Can't connect to $host:$port ($@)";
    }

    # perl 5.005's IO::Socket does not have the blocking method.
    eval { $sock->blocking(0); };

    $sock;
}

sub socket_class
{
    my $self = shift;
    (ref($self) || $self) . "::Socket";
}

sub _extra_sock_opts  # to be overridden by subclass
{
    return @EXTRA_SOCK_OPTS;
}

sub _check_sock
{
    #my($self, $req, $sock) = @_;
}

sub _get_sock_info
{
    my($self, $res, $sock) = @_;
    if (defined(my $peerhost = $sock->peerhost)) {
        $res->header("Client-Peer" => "$peerhost:" . $sock->peerport);
    }
}

sub _fixup_header
{
    my($self, $h, $url, $proxy) = @_;

    # Extract 'Host' header
    my $hhost = $url->authority;
    if ($hhost =~ s/^([^\@]*)\@//) {  # get rid of potential "user:pass@"
	# add authorization header if we need them.  HTTP URLs do
	# not really support specification of user and password, but
	# we allow it.
	if (defined($1) && not $h->header('Authorization')) {
	    require URI::Escape;
	    $h->authorization_basic(map URI::Escape::uri_unescape($_),
				    split(":", $1, 2));
	}
    }
    $h->init_header('Host' => $hhost);

    if ($proxy) {
	# Check the proxy URI's userinfo() for proxy credentials
	# export http_proxy="http://proxyuser:proxypass@proxyhost:port"
	my $p_auth = $proxy->userinfo();
	if(defined $p_auth) {
	    require URI::Escape;