Merge pull request prometheus#617 from jacksontj/time_formatting

Change all time formatting to UTC and off of time.RFC3339Nano

Author: beorn7

api/prometheus/v1/api.go

@@ -594,8 +594,8 @@ func (h *httpAPI) DeleteSeries(ctx context.Context, matches []string, startTime
 q.Add("match[]", m)
 }
 
-q.Set("start", startTime.Format(time.RFC3339Nano))
-q.Set("end", endTime.Format(time.RFC3339Nano))
+q.Set("start", formatTime(startTime))
+q.Set("end", formatTime(endTime))
 
 u.RawQuery = q.Encode()
 
@@ -659,7 +659,7 @@ func (h *httpAPI) Query(ctx context.Context, query string, ts time.Time) (model.
 
 q.Set("query", query)
 if !ts.IsZero() {
-q.Set("time", ts.Format(time.RFC3339Nano))
+q.Set("time", formatTime(ts))
 }
 
 _, body, warnings, err := api.DoGetFallback(h.client, ctx, u, q)
@@ -675,16 +675,10 @@ func (h *httpAPI) QueryRange(ctx context.Context, query string, r Range) (model.
 u := h.client.URL(epQueryRange, nil)
 q := u.Query()
 
-var (
-start = r.Start.Format(time.RFC3339Nano)
-end = r.End.Format(time.RFC3339Nano)
-step = strconv.FormatFloat(r.Step.Seconds(), 'f', 3, 64)
-)
-
 q.Set("query", query)
-q.Set("start", start)
-q.Set("end", end)
-q.Set("step", step)
+q.Set("start", formatTime(r.Start))
+q.Set("end", formatTime(r.End))
+q.Set("step", strconv.FormatFloat(r.Step.Seconds(), 'f', -1, 64))
 
 _, body, warnings, err := api.DoGetFallback(h.client, ctx, u, q)
 if err != nil {
@@ -704,8 +698,8 @@ func (h *httpAPI) Series(ctx context.Context, matches []string, startTime time.T
 q.Add("match[]", m)
 }
 
-q.Set("start", startTime.Format(time.RFC3339Nano))
-q.Set("end", endTime.Format(time.RFC3339Nano))
+q.Set("start", formatTime(startTime))
+q.Set("end", formatTime(endTime))
 
 u.RawQuery = q.Encode()
 
@@ -877,3 +871,7 @@ func (c apiClient) Do(ctx context.Context, req *http.Request) (*http.Response, [
 return resp, []byte(result.Data), warnings, err
 
 }
+
+func formatTime(t time.Time) string {
+return strconv.FormatFloat(float64(t.UnixNano())/1e9, 'f', -1, 64)
+}