java - Apache Client 4.3.4 with proxy NTLM Auth -

i have post data , have use proxy ntlm auth. problem is, 407 (proxy auth required) proxy. have no control of proxy, can not debug here!

the client logs shows proxy states:

1.) proxy auth state: unchallenged

2.) proxy auth state: challenged

3.) proxy auth state: handshake

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perhaps can check code, if should work, because hope proxy settings wrong.

ntcredentials ntcreds = new ntcredentials(ntusername, ntpassword,localmachinename, domainname );      credentialsprovider credsprovider = new basiccredentialsprovider();     httphost httpproxy = new httphost(inetaddress.getbyname(proxystring), integer.valueof(proxyport));     credsprovider.setcredentials( new authscope(httpproxy), ntcreds );     httpclientbuilder clientbuilder = httpclientbuilder.create();      clientbuilder.setproxy(httpproxy);     clientbuilder.setdefaultcredentialsprovider(credsprovider);     clientbuilder.setproxyauthenticationstrategy(new proxyauthenticationstrategy());      closeablehttpclient client = clientbuilder.build();      uri destination = new uri("http://requestb.in/1bpjk7g");     httpentity entity = new stringentity("test 123");     httppost request = new httppost(destination);     requestconfig config = requestconfig.custom().setproxy(httpproxy).build();     request.setconfig(config );     request.setentity(entity);     client.execute(request);