From c085629405b05e6f4bfbc385fb3e1831a0f54da9 Mon Sep 17 00:00:00 2001
From: Michael Stapelberg <stapelberg@google.com>
Date: Tue, 24 Nov 2015 18:10:48 +0100
Subject: [PATCH] http: abort probing when request could not be created

As per https://play.golang.org/p/4keb0zznDB, passing a nil http.Request
to Client.Do() results in a runtime error.
---
 http.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/http.go b/http.go
index 0d1c279..52ccfd4 100644
--- a/http.go
+++ b/http.go
@@ -48,6 +48,7 @@ func probeHTTP(target string, w http.ResponseWriter, module Module) (success boo
 	request, err := http.NewRequest(config.Method, target, nil)
 	if err != nil {
 		log.Errorf("Error creating request for target %s: %s", target, err)
+		return
 	}
 
 	resp, err := client.Do(request)
-- 
2.25.1