fix: add additional validation before making remote requests (#3398)

utils/netutils_test.go

@@ -0,0 +1,32 @@
+package utils
+
+import (
+	"net"
+	"testing"
+)
+
+func TestIPAddressInternal(t *testing.T) {
+	internalLoopbackHost := "localhost"
+	internalLoopbackHostTest := IsHostnameInternal(internalLoopbackHost)
+	if !internalLoopbackHostTest {
+		t.Errorf("IsHostnameInternal(%s) = %v; want true", internalLoopbackHost, internalLoopbackHostTest)
+	}
+
+	internalLoopbackIP := net.ParseIP("127.0.0.1")
+	internalLoopbackIPTest := isIPAddressInternal(internalLoopbackIP)
+	if !internalLoopbackIPTest {
+		t.Errorf("isIPAddressInternal(%s) = %v; want true", internalLoopbackIP, internalLoopbackIPTest)
+	}
+
+	externalHost := "example.com"
+	externalHostTest := IsHostnameInternal(externalHost)
+	if externalHostTest {
+		t.Errorf("IsHostnameInternal(%s) = %v; want false", externalHost, externalHostTest)
+	}
+
+	externalIP := net.ParseIP("93.184.216.34")
+	externalIPTest := isIPAddressInternal(externalIP)
+	if externalIPTest {
+		t.Errorf("isIPAddressInternal(%s) = %v; want false", externalIP, externalIPTest)
+	}
+}