init

selenium/external-host/choose/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"os"
+	"time"
+	"fmt"
+	"encoding/json"
+	"math/rand"
+)
+
+var (
+	s rand.Source
+	r *rand.Rand
+)
+
+func init() {
+	s = rand.NewSource(time.Now().Unix())
+	r = rand.New(s)
+}
+
+func main() {
+	var hosts []string
+	if err := json.Unmarshal([]byte(os.Getenv("URLS")), &hosts); err != nil {
+		fmt.Printf("unmarshal json: %v", err)
+		os.Exit(1)
+	}
+	if l := len(hosts); l > 0 {
+		fmt.Println(hosts[r.Intn(l)])
+	}
+}