add httprouter example code

go/ql/src/experimental/CWE-525/examples/WebCacheDeceptionHTTPRouter.go

@@ -0,0 +1,25 @@
+package httprouter
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+func Index(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+	fmt.Fprint(w, "Welcome!\n")
+}
+
+func Hello(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
+	fmt.Fprintf(w, "hello, %s!\n", ps.ByName("name"))
+}
+
+func main() {
+	router := httprouter.New()
+	router.GET("/test/*test", Index)
+	router.GET("/hello/:name", Hello)
+
+	log.Fatal(http.ListenAndServe(":8082", router))
+}