org.apache.http.impl.client
Classes 
AbstractAuthenticationHandler
AbstractHttpClient
BasicCookieStore
BasicCredentialsProvider
BasicResponseHandler
ClientParamsStack
DefaultConnectionKeepAliveStrategy
DefaultHttpClient
DefaultHttpRequestRetryHandler
DefaultProxyAuthenticationHandler
DefaultRedirectHandler
DefaultRequestDirector
DefaultTargetAuthenticationHandler
DefaultUserTokenHandler
EntityEnclosingRequestWrapper
RedirectLocations
RequestWrapper
RoutedRequest
Exceptions 
TunnelRefusedException