[email protected] wrote:
Hello,
The document at the mentioned location states that " NTLM is a proprietary
authentication scheme developed by Microsoft and optimized for Windows operating
system"
But I am getting the same message even when the code is run on Linux. Should I
then understand that the proxy I am trying to connect is Windows?
The proxy server you are trying to connect supports the following auth
schemes: Kerberos, NTLM, Negotiate and identifies itself as 'The ISA
Server'. And yes, most likely that means MS Windows.
Oleg
Thanks
Mallika
-----Original Message-----
From: Oleg Kalnichevski [mailto:[email protected]]
Sent: 26 October 2009 12:57
To: HttpClient User Discussion
Subject: Re: using HttpClient4.0 to retrieve files from a website.
[email protected] wrote:
Hello,
After some more search and reading, here is the sample code that I am trying
out:
HttpClient httpclient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpGet httpget = new HttpGet("targetURL");
AuthScope proxyScope = new AuthScope(proxyHost, proxyPort);
AuthScope targetScope = new AuthScope(targetHost, targetPort);
AuthState proxyAuthState = new AuthState();
proxyAuthState.setAuthScope(proxyScope);
proxyAuthState.setCredentials(new UsernamePasswordCredentials(proxyUser,
proxyPassword) );
localContext.setAttribute(ClientContext.PROXY_AUTH_STATE, proxyAuthState);
AuthState targetAuthState = new AuthState();
targetAuthState.setAuthScope(targetScope);
targetAuthState.setCredentials(new UsernamePasswordCredentials(webSiteUser,
webSitePassword) );
localContext.setAttribute(ClientContext.TARGET_AUTH_STATE, targetAuthState);
HttpHost proxy = new HttpHost(proxyHost, proxyPort);
httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
HttpResponse response = null;
HttpHost targetHost = new HttpHost(targetHost, targetPort, "https");
try {
response = httpclient.execute(targetHost, httpget);
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
}
catch(Exception e) {
System.out.println("Exception " + e.toString());
}
And I get the following output:
Oct 26, 2009 12:02:01 PM
org.apache.http.impl.client.AbstractAuthenticationHandler selectScheme
WARNING: Authentication scheme ntlm not supported
Oct 26, 2009 12:02:01 PM org.apache.http.impl.client.DefaultRequestDirector
createTunnelToTarget
WARNING: Authentication error: Unable to respond to any of these challenges:
{kerberos=Proxy-Authenticate: Kerberos, ntlm=Proxy-Authenticate: NTLM,
negotiate=Proxy-Authenticate: Negotiate}
----------------------------------------
HTTP/1.1 407 Proxy Authentication Required ( The ISA Server requires
authorization to fulfill the request. Access to the Web Proxy filter is denied.
)
Can anyone please tell me whats wrong in this?
http://hc.apache.org/httpcomponents-client/ntlm.html
Oleg
Regards
Mallika
From: GUNTURU NAGAMALLIKA (BCS/ITP)
Sent: 26 October 2009 09:38
To: '[email protected]'
Subject: using HttpClient4.0 to retrieve files from a website.
Hello,
We are trying to use HttpClient 4.0 API to connect to an internet website that
requires user authentication to retrieve files. And we connect to the internet
through a proxy that also needs a different user credentials.
All the samples that I have seen so far, do either proxy authentication or
web-site authentication but not both:
a) Is the scenario I explained above, achievable using HttpClient? I guess
it should be possible, but I am not sure how? Can someone help me with this
And for info, the production environment will be on Linux and the development
environment is Windows..
Thanks and Regards
Mallika Gunturu
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