Log the URL when calling a datasource from the proxy

Author: dhague

pkg/api/dataproxy.go

@@ -11,6 +11,7 @@ import (
 	"github.com/grafana/grafana/pkg/api/cloudwatch"
 	"github.com/grafana/grafana/pkg/api/keystone"
 	"github.com/grafana/grafana/pkg/bus"
+	"github.com/grafana/grafana/pkg/log"
 	"github.com/grafana/grafana/pkg/metrics"
 	"github.com/grafana/grafana/pkg/middleware"
 	m "github.com/grafana/grafana/pkg/models"
@@ -67,6 +68,8 @@ func NewReverseProxy(ds *m.DataSource, proxyPath string, targetUrl *url.URL) *ht
 		// clear cookie headers
 		req.Header.Del("Cookie")
 		req.Header.Del("Set-Cookie")
+
+		log.Info("Proxying call to %s", req.URL.String())
 	}
 
 	return &httputil.ReverseProxy{Director: director, FlushInterval: time.Millisecond * 200}