go get -u github.com/carlqt/alexaskill
The library comes with a middleware to handle amazons validation of Signature. Just wrap AlexaValidation middleware to any of your handlers.
package main
import (
"log"
"net/http"
"github.com/carlqt/alexaskill"
"github.com/carlqt/alexaskill/middleware"
"github.com/carlqt/alexaskill/response"
"github.com/gorilla/mux"
)
func main() {
var appID := "amazon.app.id.kdjakjf"
r := mux.NewRouter()
alexaHandler := http.HandlerFunc(index)
r.Handle("/", middleware.AlexaValidation(alexaHandler)).Methods("POST")
log.Fatal(http.ListenAndServe(":8080", r))
}
func index(w http.ResponseWriter, r *http.Request) {
advice := "Carl says: Star this repository now"
alexaReq, err := alexaskill.AlexaNewRequest(r.Body)
if err != nil {
w.Write([]byte(err.Error()))
return
}
if alexaReq.AppID() != appID {
w.WriteHeader(404)
return
}
if alexaReq.Type() == "IntentRequest" {
switch alexaReq.IntentName() {
case "AMAZON.CancelIntent":
response.AlexaText("Cancelled").SimpleCard("Cancel", "cancel").Respond(w, 200)
case "RandomAdvice":
response.AlexaText(advice).SimpleCard("Advice", advice).Respond(w, 200)
default:
log.Fatal("unrecognized")
}
}
}