Here is my code:
String addr = \"http://172.26.41.18:8080/domain/list\";
URL url = new URL(addr);
HttpURLConnection httpCon = (HttpURLConnection) url.openCo
The httpCon.setDoOutput(true);
implicitly set the request method to POST because that's the default method whenever you want to send a request body.
If you want to use GET, remove that line and remove the OutputStreamWriter out = new OutputStreamWriter(httpCon.getOutputStream());
line. You don't need to send a request body for GET requests.
The following should do for a simple GET request:
String addr = "http://172.26.41.18:8080/domain/list";
URL url = new URL(addr);
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setUseCaches(false);
httpCon.setAllowUserInteraction(false);
httpCon.addRequestProperty("Authorization", "Basic YWRtaW4fYFgjkl5463");
System.out.println(httpCon.getResponseCode());
System.out.println(httpCon.getResponseMessage());
Unrelated to the concrete problem, the password part of your Authorization
header value doesn't seem to be properly Base64-encoded. Perhaps it's scrambled because it was examplary, but even if it wasn't I'd fix your Base64 encoding approach.