Instruction: Explain what interceptors are in AngularJS and how to implement them for request and response manipulation.
Context: This question evaluates the candidate's knowledge of advanced HTTP communication handling within AngularJS applications.
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Interceptors in AngularJS are powerful tools that allow developers to intercept and transform HTTP requests and responses globally. They provide a way to modify requests before they are sent to the server and alter responses before they are returned to the application logic. This capability is crucial for implementing consistent error handling, authentication, and logging mechanisms across an application.
To implement an interceptor in AngularJS, you first need to define a service that contains the interceptor logic. This service can include four potential methods: request, requestError, response, and responseError. Each of these methods corresponds to a specific stage in the HTTP request/response cycle, allowing for precise control over the application's communication with backend services....