org.apache.http.io
Interfaces 
HttpDataReceiver
HttpDataReceiverFactory
HttpDataTransmitter
HttpDataTransmitterFactory
SecureSocketFactory
SocketFactory
Classes 
ByteArrayBuffer
CharArrayBuffer
ChunkedInputStream
ChunkedOutputStream
ContentLengthInputStream
ContentLengthOutputStream
HttpDataInputStream
HttpDataOutputStream
IdentityOutputStream
Exceptions 
MalformedChunkCodingException