Menu
Missing Authorization header in Angular 7 HTTP response
Accessing an API back-end from Angular client may result in missing response headers. A common scenario is a missing Authorization header, containing the JSON Web Token (JWT) which is returned from the back-end service when the user logs in successfully. The solution to the problem is to expose the desired header in the back-end code (notice that the Authorization header is not exposed by default). In the case of a Spring Boot back-end, we need to add the following line of code:
response.addHeader("Access-Control-Expose-Headers", "Authorization");
The same rule applies to all custom headers that need to be exposed in the response to the client. Each of them needs to be explicitly exposed in the back-end code.
The full back-end code for the successful authentication method is available below:
@Override
protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response,
FilterChain chain, Authentication authResult) throws IOException, ServletException {
String token = JWT.create()
.withSubject(((User) authResult.getPrincipal()).getUsername())
.withExpiresAt(new Date(System.currentTimeMillis() + EXPIRATION_TIME))
.sign(HMAC512(SECRET.getBytes()));
response.addHeader("Access-Control-Expose-Headers", "Authorization");
response.addHeader(HEADER_STRING, TOKEN_PREFIX + token);
}
Letzte Beiträge
Share :
Share :
Weitere Beiträge
Machine learning concepts. Network training and evaluation
The neural network model consists of two layers – an LSTM layer and an output Dense layer. The reason for choosing an LSTM layer is the need to process sequences of time-related data
MVVM and its implementation in Android
Writing application code before thinking about an architecture is a really bad idea. Android programming does not make a difference. Everybody who starts creating Android apps begins doing so without following a specific architecture.
Room. Reactive queries
Room has great integration with LiveData. Results from SQL queries can be easily wrapped in LiveData container. This way LiveData can be observed in the UI. When the data is changed in the database, all active observers get notified and update the corresponding views.
