Proxy problem accesing to a URL

Question

I'm trying to access a URL behind a proxy with password autenthication.
I tryed in this way:
System.getProperties().put("proxySet", "true");
System.getProperties().put("proxyHost", "myproxy");
System.getProperties().put("proxyPort", "80");
Authenticator.setDefault(new MyAuthenticator("us","pw"));
URL url = new URL("http://giadasvil/analisi");
InputStream inputStream = url.openStream();
BufferedReader in = new BufferedReader(new InputStreamReader(inputStream,"UTF-8"));
StringBuffer res = new StringBuffer();
String str = "";
while((str=in.readLine())!=null)
res.append(str);
return res.toString();
where MyAuthenticator:
static class MyAuthenticator extends Authenticator {
String user;
String password;
MyAuthenticator(String user, String password){
this.user = user;
this.password = password;
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication (this.user, this.password.toCharArray());
but I receive this exception:
java.io.IOException: Server returned HTTP response code: 407 for URL: http://giadasvil/analisi
can anyone help me?
thank in advance

Answer 1

Thanks a lot gunther.
But I haven't resolved the problem yet.
Proxy address and proxy port are correct because I receive a code 407 forbidden.
I'm agree the problem is the authentication with proxy.
I'm sure that my login credentials are correct, if not I can't be here writing in this forum.
I'm using windows OS.
I configured LAN settings of my browser with my proxy address and port.
And it works fine, without manually authentication with proxy.
so I supposed that my browser use for authentication with proxy my windows account and password.
I have just tried to run The example in various way:
- account password url
- domain\account password url
- domain\\account password url
- domain/account password url
- domain//account password url
but it still don't work.
The problem could be that the only protocol supported by my proxy is http.
My url is: http://www.virgilio.it
so i supposed that the protocol used is http, but i don't know how the class URL works.
The problem can be these limitation in the suported protocol of my
Proxy?