Having trouble importing mux: package appears to have no public members about mux

[elithrar]

You're getting undefined errors because your program doesn't know what mux.HandleFunc is. Note that HandleFunc is a function of the Router method—so mux.HandleFunc doesn't refer to anything.

If you take a look at the first example on http://www.gorillatoolkit.org/pkg/mux you'll find the following:

func main() {
    r := mux.NewRouter()
    r.HandleFunc("/", HomeHandler)
    r.HandleFunc("/products", ProductsHandler)
    r.HandleFunc("/articles", ArticlesHandler)
    http.Handle("/", r)
}

You need to create Router with mux.NewRouter and pass the router to http.Handle so it can offload your routes to the mux router.

Re-write your main function so it looks like this:

func main() {

    r := mux.NewRouter()

    r.HandleFunc("/", func(w http.ResponseWriter, r http.Request) { fmt.Fprint(w, "Hello")})

    http.Handle("/", r)
    http.ListenAndServe(":10000", nil)
}

That should solve the problem.

[davecheney]

You need to set GOPATH correctly. Please review

http://golang.org/doc/code.html

On 10/06/2013, at 14:17, Matthew Taylor [email protected] wrote:

I have a very simple go file, and when I try to build, i get this:

go build

_/home/matt/projects/goprojects/muxHello

./main.go:10: undefined: mux.HandleFunc
./main.go:14: undefined: mux.DefaultRoute
here is my code:

package main

import (
"fmt"
"github.com/gorilla/mux"
"net/http"
)

func main() {
mux.HandleFunc("/", func(w http.ResponseWriter, r http.Request) {
fmt.Fprint(w, "Hello")
})

http.Handle("/", mux.DefaultRoute)
http.ListenAndServe(":10000", nil)

}

I set my GOPATH to /home/matt/projects/goprojects/muxHello
then do

go get github.com/gorilla/mux
and the folders show up in

/home/matt/projects/goprojects/muxHello/src/github.com/gorilla/mux
/home/matt/projects/goprojects/muxHello/src/github.com/gorilla/context
I've tried other imports and they have worked. for instance, https://code.google.com/p/goauth2/ and https://github.com/eaigner/jet both work using the exact same steps I took with gorilla/mux.

It's like it is finding the package; but the package isn't exporting anything.

here is the output of "go env"

GOARCH="amd64"
GOBIN=""
GOCHAR="6"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/matt/projects/goprojects/muxHello"
GORACE=""
GOROOT="/home/matt/go"
GOTOOLDIR="/home/matt/go/pkg/tool/linux_amd64"
CC="gcc"
GOGCCFLAGS="-g -O2 -fPIC -m64 -pthread"
CGO_ENABLED="1"
I installed go from source. I used the release branch of go 1.1.

go version go1.1 linux/amd64
I am building a restful api as my first go project. I apologize in advance if this is because of a mistake I've made or if this isn't the right "forum" for this. I have spent several hours trying to make sure everything is setup correctly. I don't know what else to do. I created an issue because I feel like I've done everything correctly, I followed the directions on the gorilla/mux site and I haven't had this issue with other libraries.

—
Reply to this email directly or view it on GitHub.

[luv2code]

I can confirm that using the new route fixed my issue. I got the code by googling "gorilla mux hello world example" and got a really old example.

It is just a case of staring at a problem too long and missing the obvious. I could've figured this out myself if I had just read through mux.go.

@davecheney I read that article and I don't see what's wrong with my GOPATH. It's set to the root of my workspace just like the web page says. Please pm me if you don't feel like replying here. I am eager to learn.

Sorry for creating an issue for something so dumb, and thanks for the help.