How can I handle errors in a Go API?

How can I handle errors in a Go API?

In Go, you can handle errors by returning an error value from your functions. You should check for errors after calling functions that can return them.

Can you give me an example of error handling in a Go API?

Sure! Here's a simple example:

func GetUser(id string) (*User, error) {
    user, err := db.FindUserByID(id)
    if err != nil {
        return nil, fmt.Errorf("error fetching user: %w", err)
    }
    return user, nil
}

What about logging errors?

You can log errors using the log package. For example:

if err != nil {
    log.Printf("Error fetching user: %v", err)
}

How do I return a proper HTTP response for errors?

You can use the http.Error function to send an appropriate HTTP response. For example:

if err != nil {
    http.Error(w, err.Error(), http.StatusInternalServerError)
}