Golang handlefunc with channel

Question

I think this question has been asked before (and probably more than once) but I can't find it...

Im learning Go, and I wanted to extend the classical web server example by sending a channel to the "handler".

I have this standard thing:

func hello(w http.ResponseWriter, r *http.Request) {
   io.WriteString(w, "Hello world!")
}

func main() {
    http.HandleFunc("/", hello)
    http.ListenAndServe(":8000", nil)
}

And now I would like the "hello" function to be able to write stuff on a channel, for someone to consume... The way I have done with "normal" functions is to create a channel:

c := make(chan string) 

and pass c in the call to the function. Something like:

dosomething(c)

But... how would I go about doing that if I want "hello" to get access to the channel c?

Answer 1

There a few ways to solve this problem, the simplest is to define an exported channel in a package and import said package where ever you want to use the channel.

package mychannel

var Chan = make(chan string)