Golang : Set or add headers for many or different handlers



Tags : golang set-headers http-response-writer http-request

Problem : In Golang, setting headers can be done easily with the Set() method. At the moment, you are setting headers for each individual handler in such as manner : func handlerA(w http.ResponseWriter, req *http.Request) { w.Header().Set("X-Frame-Options", "SAMEORIGIN") w.Header().Set("Content-Type", "text/plain") w.Write([]byte("Set header for handler A.")) func handlerB(w http.ResponseWriter, req *http.Request) { w.Header().Set("X-Frame-Options", "SAMEORIGIN") w.Header().Set("Content-Type", "text/plain") w.Write([]byte("Set header for handler B.")) Instead of setting header for each individual handler manually, you want to use a function to set the headers. NOTE : This method can apply to Add headers as well Solution : Create a common SetHeaders() function that will write to http.ResponseWriter. For example : func SetHeaders(w http.ResponseWriter) { w.Header().Set("X-Frame-Options", "SAMEORIGIN") w.Header().Set("Content-Type", "text/plain") func handlerA(w http.ResponseWriter, req *http.Request) { SetHeaders(w) w.Write([]byte("Set header for handler A.")) func handlerB(w http.ResponseWriter, req *http.Request) { SetHeaders(w) w.Write([]byte("Set header for handler B."))

  See also : Golang : How to Set or Add Header http.ResponseWriter?



Tags : golang set-headers http-response-writer http-request

By Adam Ng

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