// Copyright 2016-2018, Pulumi Corporation. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package httputil import ( "crypto/tls" "io" "net/http" "net/http/httptest" "strconv" "strings" "testing" "golang.org/x/net/http2" "github.com/stretchr/testify/assert" ) func http2ServerAndClient(handler http.Handler) (*httptest.Server, *http.Client) { // Create an HTTP/2 test server. // httptest.StartTLS will set NextProtos to ["http/1.1"] if it's unset, so we need to add // HTTP/2 eagerly before starting the server. server := httptest.NewUnstartedServer(handler) server.TLS = &tls.Config{ //nolint:gosec NextProtos: []string{http2.NextProtoTLS}, } server.StartTLS() // Create a client for the test server that will use HTTP/2. // We need a client that will (a) upgrade to HTTP/2 and (b) trust the test server's certs. // In order to satisfy (b), httptest sets Transport to an `http.Transport`, breaking (a), // so we have to manually create an `http2.Transport` and copy over the `tls.Config`. tlsConfig := server.Client().Transport.(*http.Transport).TLSClientConfig client := &http.Client{ Transport: &http2.Transport{ TLSClientConfig: tlsConfig, }, } return server, client } // Test that DoWithRetry rewinds and resends the request body when retrying POSTs over HTTP/2. func TestRetryPostHTTP2(t *testing.T) { t.Parallel() tries := 0 handler := func(w http.ResponseWriter, r *http.Request) { tries++ t.Logf("try %d", tries) assert.Equal(t, "HTTP/2.0", r.Proto) // Check that the body's content length matches the sent data. defer r.Body.Close() content, err := io.ReadAll(r.Body) assert.NoError(t, err) assert.Equal(t, strconv.Itoa(len(content)), r.Header.Get("Content-Length")) // Check the message matches. assert.Equal(t, string(content), "hello, server") // Fail the first try with 500, which will prompt a retry. switch tries { case 1: w.WriteHeader(500) default: w.WriteHeader(200) } } server, client := http2ServerAndClient(http.HandlerFunc(handler)) req, err := http.NewRequest("POST", server.URL, strings.NewReader("hello, server")) assert.NoError(t, err) res, err := DoWithRetry(req, client) assert.NoError(t, err) defer res.Body.Close() // Check that the request succeeded on the second try. assert.Equal(t, 2, tries) assert.Equal(t, 200, res.StatusCode) }