+func (s *UnitSuite) TestEmptyResponse(c *check.C) {
+ for _, trial := range []struct {
+ dataExists bool
+ sendIMSHeader bool
+ expectStatus int
+ logRegexp string
+ }{
+ // If we return no content due to a Keep read error,
+ // we should emit a log message.
+ {false, false, http.StatusOK, `(?ms).*only wrote 0 bytes.*`},
+
+ // If we return no content because the client sent an
+ // If-Modified-Since header, our response should be
+ // 304, and we should not emit a log message.
+ {true, true, http.StatusNotModified, ``},
+ } {
+ c.Logf("trial: %+v", trial)
+ arvadostest.StartKeep(2, true)
+ if trial.dataExists {
+ arv, err := arvadosclient.MakeArvadosClient()
+ c.Assert(err, check.IsNil)
+ arv.ApiToken = arvadostest.ActiveToken
+ kc, err := keepclient.MakeKeepClient(arv)
+ c.Assert(err, check.IsNil)
+ _, _, err = kc.PutB([]byte("foo"))
+ c.Assert(err, check.IsNil)
+ }
+
+ h := handler{Config: newConfig(s.Config)}
+ u := mustParseURL("http://" + arvadostest.FooCollection + ".keep-web.example/foo")
+ req := &http.Request{
+ Method: "GET",
+ Host: u.Host,
+ URL: u,
+ RequestURI: u.RequestURI(),
+ Header: http.Header{
+ "Authorization": {"Bearer " + arvadostest.ActiveToken},
+ },
+ }
+ if trial.sendIMSHeader {
+ req.Header.Set("If-Modified-Since", strings.Replace(time.Now().UTC().Format(time.RFC1123), "UTC", "GMT", -1))
+ }
+
+ var logbuf bytes.Buffer
+ logger := logrus.New()
+ logger.Out = &logbuf
+ req = req.WithContext(ctxlog.Context(context.Background(), logger))
+
+ resp := httptest.NewRecorder()
+ h.ServeHTTP(resp, req)
+ c.Check(resp.Code, check.Equals, trial.expectStatus)
+ c.Check(resp.Body.String(), check.Equals, "")
+
+ c.Log(logbuf.String())
+ c.Check(logbuf.String(), check.Matches, trial.logRegexp)
+ }
+}
+