(cloudwatch) fix, don't block by white list (#5632)

pkg/api/dataproxy.go

@@ -90,6 +90,11 @@ func ProxyDataSourceRequest(c *middleware.Context) {
 		return
 	}
 
+	if ds.Type == m.DS_CLOUDWATCH {
+		cloudwatch.HandleRequest(c, ds)
+		return
+	}
+
 	targetUrl, _ := url.Parse(ds.Url)
 	if len(setting.DataProxyWhiteList) > 0 {
 		if _, exists := setting.DataProxyWhiteList[targetUrl.Host]; !exists {
@@ -98,13 +103,9 @@ func ProxyDataSourceRequest(c *middleware.Context) {
 		}
 	}
 
-	if ds.Type == m.DS_CLOUDWATCH {
-		cloudwatch.HandleRequest(c, ds)
-	} else {
 	proxyPath := c.Params("*")
 	proxy := NewReverseProxy(ds, proxyPath, targetUrl)
 	proxy.Transport = dataProxyTransport
 	proxy.ServeHTTP(c.Resp, c.Req.Request)
 	c.Resp.Header().Del("Set-Cookie")
-	}
 }