URI Encoding doesn't encode ':' in URI

A client wants to send a URI that contains:

/content/programid://1879048975~programid://1124073478/offers?catalogueId=1

in it's path.

Apache client doesn't encode/escape the :// part which we believe is allowed by the http spec.

if we encode manually and use:

/content/programid%3A%2F%2F1879048975~programid%3A%2F%2F1124073478/offers?catalogueId=1

then apache client re-encodes the '%' which messes up the uri.