Summary
The Angular HttpClient assigns error responses to the error property of the HttpErrorResponse, which includes HTTP Status Codes such as Unauthorized (401), Forbidden (403), Not found (404), internal Server Error (500), etc. Additionally, Angular 4.3 has introduced the HttpInterceptor interface, which allows developers to intercept and modify HTTP requests globally.
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This can be used to create an authentication service, add an interceptor to the HTTP_INTERCEPTORS array, and use the AuthService to log in and log out.
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According to
Summary
Whenever it does it will return the error response with the HTTP Status Codes such as Unauthorized (401), Forbidden (403), Not found (404), internal Server Error (500), etc. The Angular assigns the error response to error property of the HttpErrorResponse .
The client-side code can also generate the error.
Angular HTTP Error Handling - TekTutorialsHub
tektutorialshub.com
Summary
Angular 4.3 has introduced a new set of HTTP tools, the HttpInterceptor interface, which allows developers to intercept and modify HTTP requests globally. This article explains how to use the HttpInterceptor to make authenticated HTTP requests, and how to create an authentication service, add an interceptor to the HTTP_INTERCEPTORS array, and use the AuthService to log in and log out. Additionally, Ryan Chenkie provides a book called Securing Angular Applications to help developers add authentication and authorization to their Angular apps.
Angular Authentication: Using the Http Client and Http Interceptors | by Ryan Chenkie | Medium
medium.com
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angular-university.io
