How Can I Authenticate to a Remote URL in Java and Avoid a 401 Error?

Connecting to Authenticated Remote URLs in Java

To establish a connection to a remote URL requiring authentication in Java, we introduce a versatile solution to bypass the 401 error faced in the provided code. By incorporating the following modification, you can effectively provide authentication credentials during the connection process.

The proposed code snippet offers a native alternative that remains less intrusive to the rest of the application:

URL url = new URL("location address");
URLConnection uc = url.openConnection();
String userpass = username + ":" + password;
String basicAuth = "Basic " + new String(Base64.getEncoder().encode(userpass.getBytes()));
uc.setRequestProperty("Authorization", basicAuth);
InputStream in = uc.getInputStream();

This modification employs the Base64 utility to securely encode the provided username and password credentials. It then incorporates this encoded value into the Authorization request header, which is crucial for passing authentication information to the remote server. Subsequently, the getInputStream() method is utilized to retrieve the response from the server.

With this enhanced code, you can seamlessly connect to protected URLs, providing programmatic control over the authentication process without disrupting the existing codebase.

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