go - How to create many http servers into one app? -


i want create 2 http servers 1 golang app. example:

    package main      import (     "io"     "net/http" )  func helloone(w http.responsewriter, r *http.request) {     io.writestring(w, "hello world one!") }  func hellotwo(w http.responsewriter, r *http.request) {     io.writestring(w, "hello world two!") }  func main() {     // how create 2 http server instatce?      http.handlefunc("/", helloone)     http.handlefunc("/", hellotwo)     go http.listenandserve(":8001", nil)     http.listenandserve(":8002", nil) }

how create 2 http server instance , add handlers them?

you'll need create separate http.servemux instances. calling http.listenandserve(port, nil) uses defaultservemux (i.e. shared). docs here: http://golang.org/pkg/net/http/#newservemux

example:

func main() {     r1 := http.newservemux()     r1.handlefunc("/", helloone)      r2 := http.newservemux()     r2.handlefunc("/", hellotwo)      go func() { log.fatal(http.listenandserve(":8001", r1))}()     go func() { log.fatal(http.listenandserve(":8002", r2))}()     select {} }

wrapping servers log.fatal cause program quit if 1 of listeners doesn't function. if wanted program stay if 1 of servers fails start or crashes, err := http.listenandserve(port, mux) , handle error way.


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