org.apache.jmeter.protocol.http.util
Interfaces 
HTTPConstantsInterface
Classes 
Base64Encoder
ConversionUtils
DOMPool
EncoderCache
HTTPArgument
HTTPConstants
HTTPFileArg
HTTPFileArgs
HTTPResultConverter
LoopbackHttpClientSocketFactory
LoopbackHTTPSocket
SlowHttpClientSocketFactory
WSDLHelper
Exceptions 
WSDLException