org.apache.http.impl.auth
Class AuthSchemeBase

java.lang.Object
  org.apache.http.impl.auth.AuthSchemeBase

All Implemented Interfaces:

AuthScheme, ContextAwareAuthScheme

Direct Known Subclasses:

GGSSchemeBase, NTLMScheme, RFC2617Scheme

@NotThreadSafe
public abstract class AuthSchemeBase
extends Object
implements ContextAwareAuthScheme

Abstract authentication scheme class that serves as a basis for all authentication schemes supported by HttpClient. This class defines the generic way of parsing an authentication challenge. It does not make any assumptions regarding the format of the challenge nor does it impose any specific way of responding to that challenge.

Since:

4.0

Constructor Summary

AuthSchemeBase()

AuthSchemeBase(ChallengeState challengeState)
Creates an instance of AuthSchemeBase with the given challenge state.

Method Summary

Header	authenticate(Credentials credentials, HttpRequest request, HttpContext context) Produces an authorization string for the given set of Credentials.
ChallengeState	getChallengeState() Returns ChallengeState value or null if unchallenged.
boolean	isProxy() Returns true if authenticating against a proxy, false otherwise.
protected abstract void	parseChallenge(CharArrayBuffer buffer, int beginIndex, int endIndex)
void	processChallenge(Header header) Processes the given challenge token.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.http.auth.AuthScheme

authenticate, getParameter, getRealm, getSchemeName, isComplete, isConnectionBased

Constructor Detail

AuthSchemeBase

public AuthSchemeBase(ChallengeState challengeState)

Creates an instance of AuthSchemeBase with the given challenge state.

Since:

4.2

AuthSchemeBase

public AuthSchemeBase()

Method Detail

processChallenge

public void processChallenge(Header header)
                      throws MalformedChallengeException

Processes the given challenge token. Some authentication schemes may involve multiple challenge-response exchanges. Such schemes must be able to maintain the state information when dealing with sequential challenges

Specified by:

processChallenge in interface AuthScheme

Parameters:

header - the challenge header

Throws:

MalformedChallengeException - is thrown if the authentication challenge is malformed

authenticate

public Header authenticate(Credentials credentials,
                           HttpRequest request,
                           HttpContext context)
                    throws AuthenticationException

Description copied from interface: ContextAwareAuthScheme

Produces an authorization string for the given set of Credentials.

Specified by:

authenticate in interface ContextAwareAuthScheme

Parameters:

credentials - The set of credentials to be used for athentication

request - The request being authenticated

context - HTTP context

Returns:

the authorization string

Throws:

AuthenticationException - if authorization string cannot be generated due to an authentication failure

parseChallenge

protected abstract void parseChallenge(CharArrayBuffer buffer,
                                       int beginIndex,
                                       int endIndex)
                                throws MalformedChallengeException

Throws:

MalformedChallengeException

isProxy

public boolean isProxy()

Returns true if authenticating against a proxy, false otherwise.

getChallengeState

public ChallengeState getChallengeState()

Returns ChallengeState value or null if unchallenged.

Since:

4.2

toString

public String toString()

Overrides:

toString in class Object