UnauthorizedException class

Exception for HTTP 401 Unauthorized errors.

Thrown when authentication credentials are missing, invalid, or expired. This typically occurs when:

  • Access token has expired
  • User is not logged in
  • Invalid credentials provided

The default message indicates session expiration and prompts re-authentication.

Handling this exception usually triggers a redirect to the login screen or automatic token refresh attempt.

Example:

if (response.statusCode == 401) {
  throw UnauthorizedException(originalException: dioError);
  // Interceptor will catch this and redirect to login
}
Inheritance

Constructors

UnauthorizedException({String? message, DioException? originalException, String? errorCode, String? traceId})
Creates an UnauthorizedException with an optional custom message.
const

Properties

errorCode → String?
A machine-readable error code from the backend's ErrorResponse envelope (e.g. VALIDATION_ERROR, TOO_MANY_REQUESTS), or null if the response body didn't match that schema.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
message → String
A human-readable description of the error.
finalinherited
originalException → DioException?
The underlying Dio exception that caused this network error.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
traceId → String?
The backend's request-trace identifier from the ErrorResponse envelope, for correlating this error with server-side logs — or null if the response body didn't match that schema.
finalinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
The string representation of this exception, including Dio-level details.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited