Better log message

cmd/rqlited/main.go

@@ -600,8 +600,8 @@ func createCluster(cfg *Config, hasPeers bool, client *cluster.Client, str *stor
 
 func networkCheckJoinAddrs(joinAddrs []string) error {
 	log.Println("checking that join addresses don't serve HTTP(S)")
-	if http.AnyServingHTTP(joinAddrs) {
-		return fmt.Errorf("join address appears to be serving HTTP when it should be Raft")
+	if addr, ok := http.AnyServingHTTP(joinAddrs); ok {
+		return fmt.Errorf("join address %s appears to be serving HTTP when it should be Raft", addr)
 	}
 	return nil
 }

http/preflight.go

@@ -6,15 +6,15 @@ import (
 	"time"
 )
 
-// AnyServingHTTP returns true if there appears to be a HTTP or HTTPS server
-// running on any of the given addresses.
-func AnyServingHTTP(addrs []string) bool {
+// AnyServingHTTP returns the first address in the list that appears to be
+// serving HTTP or HTTPS, or false if none of them are.
+func AnyServingHTTP(addrs []string) (string, bool) {
 	for _, addr := range addrs {
 		if IsServingHTTP(addr) {
-			return true
+			return addr, true
 		}
 	}
-	return false
+	return "", false
 }
 
 // IsServingHTTP returns true if there appears to be a HTTP or HTTPS server

http/preflight_test.go

@@ -23,8 +23,8 @@ func Test_IsServingHTTP_HTTPServer(t *testing.T) {
 	if !IsServingHTTP(addr) {
 		t.Fatalf("Expected true for HTTP server running on %s", addr)
 	}
-	if !AnyServingHTTP([]string{addr}) {
-		t.Fatalf("Expected true for HTTP server running on %s", addr)
+	if a, ok := AnyServingHTTP([]string{addr}); !ok || a != addr {
+		t.Fatalf("Expected %s for AnyServingHTTP", addr)
 	}
 }
 
@@ -39,8 +39,8 @@ func Test_IsServingHTTP_HTTPSServer(t *testing.T) {
 	if !IsServingHTTP(addr) {
 		t.Error("Expected true for HTTPS server running")
 	}
-	if !AnyServingHTTP([]string{addr}) {
-		t.Fatalf("Expected true for HTTPS server running")
+	if a, ok := AnyServingHTTP([]string{addr}); !ok || a != addr {
+		t.Fatalf("Expected %s for AnyServingHTTP", addr)
 	}
 }
 
@@ -50,7 +50,7 @@ func Test_IsServingHTTP_NoServersRunning(t *testing.T) {
 	if IsServingHTTP(addr) {
 		t.Error("Expected false for no servers running")
 	}
-	if AnyServingHTTP([]string{addr}) {
+	if _, ok := AnyServingHTTP([]string{addr}); ok {
 		t.Error("Expected false for no servers running")
 	}
 }
@@ -61,7 +61,7 @@ func Test_IsServingHTTP_InvalidAddress(t *testing.T) {
 	if IsServingHTTP(addr) {
 		t.Error("Expected false for invalid address")
 	}
-	if AnyServingHTTP([]string{addr}) {
+	if _, ok := AnyServingHTTP([]string{addr}); ok {
 		t.Error("Expected false for invalid address")
 	}
 }
@@ -77,8 +77,8 @@ func Test_IsServingHTTP_HTTPErrorStatusCode(t *testing.T) {
 	if !IsServingHTTP(addr) {
 		t.Error("Expected true for HTTP server running, even with error status code")
 	}
-	if !AnyServingHTTP([]string{addr}) {
-		t.Error("Expected true for HTTP server running, even with error status code")
+	if a, ok := AnyServingHTTP([]string{addr}); !ok || a != addr {
+		t.Fatalf("Expected %s for AnyServingHTTP, even with error status code", addr)
 	}
 }
 
@@ -93,8 +93,8 @@ func Test_IsServingHTTP_HTTPSSuccessStatusCode(t *testing.T) {
 	if !IsServingHTTP(addr) {
 		t.Error("Expected true for HTTPS server running with success status code")
 	}
-	if !AnyServingHTTP([]string{addr}) {
-		t.Error("Expected true for HTTPS server running with success status code")
+	if a, ok := AnyServingHTTP([]string{addr}); !ok || a != addr {
+		t.Fatalf("Expected %s for AnyServingHTTP with success status code", addr)
 	}
 }
 
@@ -110,7 +110,7 @@ func Test_IsServingHTTP_OpenPort(t *testing.T) {
 	if IsServingHTTP(addr) {
 		t.Error("Expected false for open port")
 	}
-	if AnyServingHTTP([]string{addr}) {
+	if _, ok := AnyServingHTTP([]string{addr}); ok {
 		t.Error("Expected false for open port")
 	}
 }
@@ -137,7 +137,26 @@ func Test_IsServingHTTP_OpenPortTLS(t *testing.T) {
 	if IsServingHTTP(addr) {
 		t.Error("Expected false for open TLS port")
 	}
-	if AnyServingHTTP([]string{addr}) {
+	if _, ok := AnyServingHTTP([]string{addr}); ok {
 		t.Error("Expected false for open TLS port")
 	}
 }
+
+func Test_IsServingHTTP_HTTPServerTCPPort(t *testing.T) {
+	httpServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer httpServer.Close()
+
+	ln, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ln.Close()
+
+	httpAddr := httpServer.Listener.Addr().String()
+	tcpAddr := ln.Addr().String()
+	if a, ok := AnyServingHTTP([]string{httpAddr, tcpAddr}); !ok || a != httpAddr {
+		t.Fatalf("Expected %s for AnyServingHTTP", httpAddr)
+	}
+}