/**
* Returns an HTTPConnection. A cache of connections is kept and first
* consulted; only when the cache lookup fails is a new one created
* and added to the cache.
*
* @param url the url
* @return an HTTPConnection
* @exception ProtocolNotSuppException if the protocol is not supported
*/
protected HTTPConnection getConnection(URL url)
throws ProtocolNotSuppException
{
// try the cache, using the host name
String php = url.getProtocol() + ":" + url.getHost() + ":" +
((url.getPort() != -1) ? url.getPort() :
URI.defaultPort(url.getProtocol()));
php = php.toLowerCase();
HTTPConnection con = (HTTPConnection) connections.get(php);
if (con != null) return con;
// Not in cache, so create new one and cache it
con = new HTTPConnection(url);
connections.put(php, con);
return con;
}
