When it comes to handling errors in my application, I have implemented a comprehensive approach consisting of four key components. Firstly, an http interceptor is used to handle server returned errors effectively. Secondly, I have a global error handler that extends the functionality of the default Angular error handler. Additionally, there is an error service in place to log errors for backend support purposes. Lastly, a Material dialog component is utilized to provide a user-friendly message in case of errors.
In certain scenarios, such as encountering a 404 error, I aim to capture the error status code and redirect to a specific component to enhance the end user experience. For instance, if the server responds with a 404 status code, the user should be redirected to a custom "not found" component without displaying an error dialog.
To achieve this, I have created an http interceptor that includes logic to detect the 404 status code and perform the necessary redirect. Here's a snippet of the interceptor implementation:
// Implementing the HttpErrorInterceptor class to manage HTTP errors
import { Injectable } from '@angular/core';
...
@Injectable()
export class HttpErrorInterceptor implements HttpInterceptor {
constructor(...) {}
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
return next.handle(request).pipe(
retry(1),
catchError((error: HttpErrorResponse) => {
if (error.status === 404) {
console.log('error.status: ', error.status);
// Redirect to the desired component
} else {
// Handle other types of errors accordingly
}
})
);
}
openDialog(data): void {...}
}
While the interceptor successfully handles the redirection based on the error status code, I encountered an issue where the global error handler is inadvertently triggered alongside the redirection process. The intention is to only redirect in case of a 404 error without invoking the global error handler.
For managing global errors, I've implemented a GlobalErrorHandler class that captures errors application-wide and logs them appropriately. Here's an excerpt from the Global Handler implementation:
// Implementation of the GlobalErrorHandler class to handle and log errors
import { ErrorHandler, Injectable, Injector } from '@angular/core';
...
@Injectable({
providedIn: 'root'
})
export class GlobalErrorHandler implements ErrorHandler {
constructor(private injector: Injector, public dialog: MatDialog) {}
handleError(error: Error) {
// Error handling logic
}
openDialog(data): void {...}
}
Is there a way to ensure that when a 404 error occurs, the redirection is executed without triggering the execution of the global error handler? Any insights or suggestions would be greatly appreciated.