How do I handle errors when using JWT in Go?

How do I handle errors when using JWT in Go?

In Go, you can handle JWT errors by checking the error returned from functions like Parse or Verify. Always log the error for debugging.

What specific errors should I look out for?

Common errors include token expiration, invalid signature, and malformed tokens. Each of these requires specific handling.

Can you show me a code example?

Sure! Here's a simple example:

if _, err := jwt.Parse(tokenString, keyFunc); err != nil {
    if err == jwt.ErrSignatureInvalid {
        // Handle invalid signature
    } else if err == jwt.ErrTokenExpired {
        // Handle expired token
    } else {
        // Handle other errors
    }
}

What libraries do you recommend for JWT in Go?

I recommend using the github.com/dgrijalva/jwt-go library, which is widely used and well-documented.