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java.net
Class Authenticator

java.lang.Object
  extended by java.net.Authenticator
See Also:
Top Examples, Source Code, PasswordAuthentication, setDefault(java.net.Authenticator), getPasswordAuthentication()
public Authenticator()
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protected PasswordAuthentication getPasswordAuthentication()
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protected final String getRequestingHost()
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protected final int getRequestingPort()
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protected final String getRequestingPrompt()
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protected final String getRequestingProtocol()
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URL.getProtocol()
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protected final String getRequestingScheme()
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protected final InetAddress getRequestingSite()
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protected URL getRequestingURL()
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protected Authenticator.RequestorType getRequestorType()
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public static PasswordAuthentication requestPasswordAuthentication(String host,
                                                                   InetAddress addr,
                                                                   int port,
                                                                   String protocol,
                                                                   String prompt,
                                                                   String scheme)
See Also:
NetPermission, SecurityManager.checkPermission(java.security.Permission), SecurityException, getRequestingProtocol()
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public static PasswordAuthentication requestPasswordAuthentication(String host,
                                                                   InetAddress addr,
                                                                   int port,
                                                                   String protocol,
                                                                   String prompt,
                                                                   String scheme,
                                                                   URL url,
                                                                   Authenticator.RequestorType reqType)
See Also:
NetPermission, SecurityManager.checkPermission(java.security.Permission), SecurityException, getRequestingProtocol()
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public static PasswordAuthentication requestPasswordAuthentication(InetAddress addr,
                                                                   int port,
                                                                   String protocol,
                                                                   String prompt,
                                                                   String scheme)
See Also:
NetPermission, SecurityManager.checkPermission(java.security.Permission), SecurityException, getRequestingProtocol()
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public static void setDefault(Authenticator a)
See Also:
NetPermission, SecurityManager.checkPermission(java.security.Permission), SecurityException
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[1481]Double authentication problem
By Anonymous on 2005/07/14 03:26:18  Rate
Pay attention here! If you use this class to authenticate, the request will be send twice over the wire. The first request will be denied access by the server, the server's response triggers the default authenticator. The client resubmits the request with the "Authorisation" header added to the request.  
  
  
 Solution to send this authentication immediatelly: 
  
  
 URL url = new URL ( ???http://host/service??? ) ; 
 URLConnection connection = url.openConnection (  ) ; 
 PasswordAuthentication pa = Authenticator.requestPasswordAuthentication (  
   InetAddress.getByName ( connection.getURL (  ) .getHost (  )  ) , 
   connection.getURL (  ) .getPort (  ) , 
   connection.getURL (  ) .getProtocol (  ) , 
 null, 
   "Basic" ) ; 
 StringBuffer buf = new StringBuffer ( pa.getUserName (  )  ) ; 
 buf.append ( ":" ) ; 
 buf.append ( pa.getPassword (  )  ) ; 
 String encoded = new BASE64Encoder (  ) .encode ( buf.toString (  ) .getBytes (  )  ) ;; 
 connection.setRequestProperty  ( "Authorization", "Basic " + encoded ) ;     
  
  
  
 
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