HTTP requests with basic authentication

Question

I have to download and parse XML files from http server with HTTP Basic authentication. Now I'm doing it this way:

URL url = new URL("http://SERVER.WITHOUT.AUTHENTICATION/some.xml");      DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();      DocumentBuilder db = dbf.newDocumentBuilder();      Document doc = db.parse(new InputSource(url.openStream()));      doc.getDocumentElement().normalize(); 

But in that way I can't get xml (or I'm just simply not aware of that ) document from server with http authentication.

I will be really grateful if you can show me the best and easiest way to reach my goal.

Answer 1

You can use an Authenticator. For example:

Authenticator.setDefault(new Authenticator() {  @Override         protected PasswordAuthentication getPasswordAuthentication() {          return new PasswordAuthentication(    "user", "password".toCharArray());         } }); 

This sets the default Authenticator and will be used in all requests. Obviously the setup is more involved when you don't need credentials for all requests or a number of different credentials, maybe on different threads.

Alternatively you can use a DefaultHttpClient where a GET request with basic HTTP authentication would look similar to:

HttpClient httpClient = new DefaultHttpClient(); HttpGet httpGet = new HttpGet("http://foo.com/bar"); httpGet.addHeader(BasicScheme.authenticate(  new UsernamePasswordCredentials("user", "password"),  "UTF-8", false));  HttpResponse httpResponse = httpClient.execute(httpGet); HttpEntity responseEntity = httpResponse.getEntity();  // read the stream returned by responseEntity.getContent() 

I recommend using the latter because it gives you a lot more control (e.g. method, headers, timeouts, etc.) over your request.