Example #1
0
func TestSimpleHTTPClientDoCancelContextWaitForRoundTrip(t *testing.T) {
	tr := newFakeTransport()
	c := &simpleHTTPClient{transport: tr}

	donechan := make(chan struct{})
	ctx, cancel := context.WithCancel(context.Background())
	go func() {
		c.Do(ctx, &fakeAction{})
		close(donechan)
	}()

	// This should call CancelRequest and begin the cancellation process
	cancel()

	select {
	case <-donechan:
		t.Fatalf("simpleHTTPClient.Do should not have exited yet")
	default:
	}

	tr.finishCancel <- struct{}{}

	select {
	case <-donechan:
		//expected behavior
		return
	case <-time.After(time.Second):
		t.Fatalf("simpleHTTPClient.Do did not exit within 1s")
	}
}
Example #2
0
func TestSimpleHTTPClientDoCancelContextResponseBodyClosed(t *testing.T) {
	tr := newFakeTransport()
	c := &simpleHTTPClient{transport: tr}

	// create an already-cancelled context
	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	body := &checkableReadCloser{ReadCloser: ioutil.NopCloser(strings.NewReader("foo"))}
	go func() {
		// wait that simpleHTTPClient knows the context is already timed out,
		// and calls CancelRequest
		testutil.WaitSchedule()

		// response is returned before cancel effects
		tr.respchan <- &http.Response{Body: body}
	}()

	_, _, err := c.Do(ctx, &fakeAction{})
	if err == nil {
		t.Fatalf("expected non-nil error, got nil")
	}

	if !body.closed {
		t.Fatalf("expected closed body")
	}
}
Example #3
0
func TestSimpleHTTPClientDoCancelContextResponseBodyClosedWithBlockingBody(t *testing.T) {
	tr := newFakeTransport()
	c := &simpleHTTPClient{transport: tr}

	ctx, cancel := context.WithCancel(context.Background())
	body := &checkableReadCloser{ReadCloser: &blockingBody{c: make(chan struct{})}}
	go func() {
		tr.respchan <- &http.Response{Body: body}
		time.Sleep(2 * time.Millisecond)
		// cancel after the body is received
		cancel()
	}()

	_, _, err := c.Do(ctx, &fakeAction{})
	if err != context.Canceled {
		t.Fatalf("expected %+v, got %+v", context.Canceled, err)
	}

	if !body.closed {
		t.Fatalf("expected closed body")
	}
}
Example #4
0
func TestHTTPClusterClientAutoSyncCancelContext(t *testing.T) {
	cf := newStaticHTTPClientFactory([]staticHTTPResponse{
		{
			resp: http.Response{StatusCode: http.StatusOK, Header: http.Header{"Content-Type": []string{"application/json"}}},
			body: []byte(`{"members":[{"id":"2745e2525fce8fe","peerURLs":["http://127.0.0.1:7003"],"name":"node3","clientURLs":["http://127.0.0.1:4003"]},{"id":"42134f434382925","peerURLs":["http://127.0.0.1:2380","http://127.0.0.1:7001"],"name":"node1","clientURLs":["http://127.0.0.1:2379","http://127.0.0.1:4001"]},{"id":"94088180e21eb87b","peerURLs":["http://127.0.0.1:7002"],"name":"node2","clientURLs":["http://127.0.0.1:4002"]}]}`),
		},
	})

	hc := &httpClusterClient{
		clientFactory: cf,
		rand:          rand.New(rand.NewSource(0)),
	}
	err := hc.reset([]string{"http://127.0.0.1:2379"})
	if err != nil {
		t.Fatalf("unexpected error during setup: %#v", err)
	}
	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	err = hc.AutoSync(ctx, time.Hour)
	if err != context.Canceled {
		t.Fatalf("incorrect error value: want=%v got=%v", context.Canceled, err)
	}
}
Example #5
0
func (c *simpleHTTPClient) Do(ctx context.Context, act httpAction) (*http.Response, []byte, error) {
	req := act.HTTPRequest(c.endpoint)

	if err := printcURL(req); err != nil {
		return nil, nil, err
	}

	hctx, hcancel := context.WithCancel(ctx)
	if c.headerTimeout > 0 {
		hctx, hcancel = context.WithTimeout(ctx, c.headerTimeout)
	}
	defer hcancel()

	reqcancel := requestCanceler(c.transport, req)

	rtchan := make(chan roundTripResponse, 1)
	go func() {
		resp, err := c.transport.RoundTrip(req)
		rtchan <- roundTripResponse{resp: resp, err: err}
		close(rtchan)
	}()

	var resp *http.Response
	var err error

	select {
	case rtresp := <-rtchan:
		resp, err = rtresp.resp, rtresp.err
	case <-hctx.Done():
		// cancel and wait for request to actually exit before continuing
		reqcancel()
		rtresp := <-rtchan
		resp = rtresp.resp
		switch {
		case ctx.Err() != nil:
			err = ctx.Err()
		case hctx.Err() != nil:
			err = fmt.Errorf("client: endpoint %s exceeded header timeout", c.endpoint.String())
		default:
			panic("failed to get error from context")
		}
	}

	// always check for resp nil-ness to deal with possible
	// race conditions between channels above
	defer func() {
		if resp != nil {
			resp.Body.Close()
		}
	}()

	if err != nil {
		return nil, nil, err
	}

	var body []byte
	done := make(chan struct{})
	go func() {
		body, err = ioutil.ReadAll(resp.Body)
		done <- struct{}{}
	}()

	select {
	case <-ctx.Done():
		resp.Body.Close()
		<-done
		return nil, nil, ctx.Err()
	case <-done:
	}

	return resp, body, err
}