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HttpClient - Coggle Diagram

- - - - HttpRequest
        
        The HttpRequest is an outgoing HTTP request which is being intercepted. It contains URL, method, headers, body, and other request configuration.
        
        The HttpRequest is a immutable class. Which means that we can’t modify the original request. To make changes we need to clone the Original request using the HttpRequest.clone method
      - HttpHandler
        
        The HttpHandler dispatches the HttpRequest to the next Handler using the method HttpHandler.handle. The next handler could be another Interceptor in the chain or the Http Backend.
      - Register HeaderInterceptor as the Provider for the HTTP_INTERCEPTORS
        
        providers: [GitHubService,{provide: HTTP_INTERCEPTORS,useClass: AppHttpInterceptor,multi: true}]
        
        Setting the new headers
        
        req = req.clone({ headers: req.headers.set('Content-Type', 'application/json') });
        
        req = req.clone({ headers: req.headers.append('Content-Type', 'application/json') });
        
        req = req.clone( {setHeaders: {‘Content-Type’: ‘application/json’}} );
        
        req = req.clone({ headers: req.headers.delete('Content-Type','application/json') });
        
        req.headers.get('Accept')
        
        Adding the Authorisation token
        
        Intercepting the Response
        
        Logging
        
        Modify Response
        
        Catching the Error
        
        Cancel the current Request
        
        Change the Requested URL