I want to use multiple handlers inside the ListenAndServe
method from the http
package. For example:
if err := http.ListenAndServe(":"+s.config.Port,
handlers.LoggingHandler(os.Stdout, s.router),
handlers.CORS()(r.router)
); err != nil {
Problem:
Everytime I'm getting the following error:
pkg/server/server.go:30:31: too many arguments in call to http.ListenAndServe have (string, http.Handler, http.Handler) want (string, http.Handler) pkg/server/server.go:30:113: undefined: r
Question:
Now it's not accepting more than 2 arguments, so is there any alternative of doing this?
ListenAndServe
only takes a single http.Handler
.
The simplest way to do this without bringing in a library is to build a http.Handler
that encompasses both:
func simpleChain(hs ...http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request){
for _, h := range hs {
h.ServeHTTP(w, r)
}
})
}
This has some problems though if any of the handlers want to do something to the Request.Body
or write to the ResponseWriter
.
For example, you might want a handler to check if the request has permission and then prevent the other handlers from getting invoked. This implies that the ResponseWriter
's status code needs to be checked. I would say bring in a library at this point.