似乎方法.connect（）不起作用

Question

I'm trying to use this code to remove a user from a database before running some tests:

URL url = new URL("someurl/remove?user=user001@mailinator.com");
HttpURLConnection huc = (HttpURLConnection)url.openConnection();
String userPassword = "is:IS!";
String encoding = new sun.misc.BASE64Encoder().encode(userPassword.getBytes());
huc.setRequestMethod("GET");
huc.setRequestProperty("Authorization", "Basic " + encoding);
huc.connect();

It doesn't work for me ( user001 is still presented in database). But all works fine if I use .getResponseCode() instead of .connect() . Why?

Answer 1

Because when you call

huc.connect();

you are not actually calling the url. You are just opening connection to the server. And normally you shouldn't call that method because that is called when you call something like

getInputStream(), getResponseCode(), or getResponseMessage()

Answer 2

In the sun.net.www.protocol.http.HttpURLConnection implementation of HttpURLConnection, connect() by itself does not actually send the request (including authenticate, handle re-directs, etc.). That requires a call to getInputStream(), which may come later.

The call to getResponseCode calls getInputStream if has not been called already.