An example of parsing the error types using errors.Is.
()
| 163 | |
| 164 | // An example of parsing the error types using errors.Is. |
| 165 | func ExampleParse_errorChecking() { |
| 166 | // Token from another example. This token is expired |
| 167 | var tokenString = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJleHAiOjE1MDAwLCJpc3MiOiJ0ZXN0In0.HE7fK0xOQwFEr4WDgRWj4teRPZ6i3GLwD5YCm6Pwu_c" |
| 168 | |
| 169 | token, err := jwt.Parse(tokenString, func(token *jwt.Token) (any, error) { |
| 170 | return []byte("AllYourBase"), nil |
| 171 | }) |
| 172 | |
| 173 | switch { |
| 174 | case token.Valid: |
| 175 | fmt.Println("You look nice today") |
| 176 | case errors.Is(err, jwt.ErrTokenMalformed): |
| 177 | fmt.Println("That's not even a token") |
| 178 | case errors.Is(err, jwt.ErrTokenSignatureInvalid): |
| 179 | // Invalid signature |
| 180 | fmt.Println("Invalid signature") |
| 181 | case errors.Is(err, jwt.ErrTokenExpired) || errors.Is(err, jwt.ErrTokenNotValidYet): |
| 182 | // Token is either expired or not active yet |
| 183 | fmt.Println("Timing is everything") |
| 184 | default: |
| 185 | fmt.Println("Couldn't handle this token:", err) |
| 186 | } |
| 187 | |
| 188 | // Output: Timing is everything |
| 189 | } |