It is a general-header that is used to specify directives for both caching mechanisms that is requests and responses. The caching directives are unidirectional, which means that a given directive in a request is not implying that the same directive is to be given in the response. […]

The notorious targets for all sorts of cyber attacks can be zeroed down to the web applications. The increasing pattern of cyber attacks has led us, to not just inculcate cyber security as a luxury, rather as a necessity for all the web developers and above all for those developers who are responsible for building the consumer-facing applications. […]

This entity header lists down the set of methods that are supported by a resource.The Allow header should be sent when the server responds with a “405 Method Not Allowed” status code to indicate which request methods can be used. If for example, an “Allow” header which is empty points out to the fact that the resource doesn’t allow any sort of request methods that might occur temporarily for a given resource. […]

This is a request header that is used when issuing a preflight request so as to let the server know which HTTP method would be used when the actual request is made. This header is of importance as the preflight request is always an OPTIONS (a HTTP method that is used to describe the communication options available for the target resource) and also it does not use the same method as the actual request. […]

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