http proxy API

[al so <vo...@gmail.com>]

<Subject changed to reflect the contents>

> Is there an API that can perform some diagnostics to verify the http proxy
> configuration:
>
>  some thing like: boolean verifyProxyConfiguration(hostname, port,
> basicAuth, username, passwd)
>
>  This method would do http  CONNECT handshake with the proxy and returns
> success/failure. It would be be nice to capture any error message as well.
>
>

RE: http proxy API

[Martin Gainty <mg...@hotmail.com>]

DIRECT



          Represents a direct connection, or the absence of a proxy.


HTTP



          Represents proxy for high level protocols such as HTTP or FTP.


SOCKS



          Represents a SOCKS (V4 or V5) proxy.
//in your case since you need to authentication via username and proxy you'll want to specify SOCKS
//then Generating a proxy you will need 2 parameters Proxy.Type which is SOCKS  and

//then generate a SocketAddress
InetSocketAddress(String hostname,
                  int port)

for your 2nd parameter SocketAddress

public Proxy(Proxy.Type type,
             SocketAddress sa)

Now you finally have a non-null valid Proxy object which is supplied as the parameter to URL.openConnection
then openConnection thru the proxy to the existing URL object is described at

http://docs.oracle.com/javase/1.5.0/docs/api/java/net/URL.html#openConnection%28java.net.Proxy%29




You're going to need 
catch(IoException exp)
so Be aware of timeout issues as you need to establish a Socket connection thru the Proxy 
http://www.docjar.com/html/api/org/apache/harmony/luni/net/PlainSocketImpl.java.html

//if you're getting IOExceptions you're going to have to need to create a object of SocketImpl with a proxy
http://www.docjar.com/html/api/org/apache/harmony/luni/net/PlainSocketImpl.java.html
 public PlainSocketImpl(Proxy proxy) {
    }

//then connecting with specific SocketOptions.SO_TIMEOUT
public void setOption(int optID, Object val) throws SocketException {
  318           if (optID == SocketOptions.SO_TIMEOUT) {

//then connecting using a specific timeout parameter
/**
  218        * Connects this socket to the specified remote host address/port.
  219        * 
  220        * @param anAddr
  221        *            the remote host address to connect to
  222        * @param aPort
  223        *            the remote port to connect to
  224        * @param timeout
  225        *            a timeout where supported. 0 means no timeout
  226        * @throws IOException
  227        *             if an error occurs while connecting
  228        */
  229       private void connect(InetAddress anAddr, int aPort, int timeout)
  230               throws IOException {

HTH,
Martin Gainty 
______________________________________________ 
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> Date: Thu, 23 Aug 2012 07:02:56 -0700
> Subject: http proxy API
> From: volkswak@gmail.com
> To: user@commons.apache.org
> 
> <Subject changed to reflect the contents>
> 
> > Is there an API that can perform some diagnostics to verify the http proxy
> > configuration:
> >
> >  some thing like: boolean verifyProxyConfiguration(hostname, port,
> > basicAuth, username, passwd)
> >
> >  This method would do http  CONNECT handshake with the proxy and returns
> > success/failure. It would be be nice to capture any error message as well.
> >
> >