mirror of https://github.com/grpc/grpc-go.git
110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
/*
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* Copyright 2022 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package test
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import (
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"bytes"
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"io"
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"net"
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"testing"
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"golang.org/x/net/http2"
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)
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var (
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clientPreface = []byte(http2.ClientPreface)
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)
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func newClientTester(t *testing.T, conn net.Conn) *clientTester {
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ct := &clientTester{
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t: t,
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conn: conn,
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}
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ct.fr = http2.NewFramer(conn, conn)
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ct.greet()
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return ct
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}
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type clientTester struct {
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t *testing.T
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conn net.Conn
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fr *http2.Framer
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}
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// greet() performs the necessary steps for http2 connection establishment on
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// the server side.
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func (ct *clientTester) greet() {
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ct.wantClientPreface()
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ct.wantSettingsFrame()
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ct.writeSettingsFrame()
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ct.writeSettingsAck()
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for {
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f, err := ct.fr.ReadFrame()
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if err != nil {
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ct.t.Errorf("error reading frame from client side: %v", err)
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}
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switch f := f.(type) {
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case *http2.SettingsFrame:
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if f.IsAck() { // HTTP/2 handshake completed.
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return
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}
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default:
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ct.t.Errorf("during greet, unexpected frame type %T", f)
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}
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}
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}
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func (ct *clientTester) wantClientPreface() {
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preface := make([]byte, len(clientPreface))
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if _, err := io.ReadFull(ct.conn, preface); err != nil {
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ct.t.Errorf("Error at server-side while reading preface from client. Err: %v", err)
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}
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if !bytes.Equal(preface, clientPreface) {
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ct.t.Errorf("received bogus greeting from client %q", preface)
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}
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}
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func (ct *clientTester) wantSettingsFrame() {
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frame, err := ct.fr.ReadFrame()
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if err != nil {
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ct.t.Errorf("error reading initial settings frame from client: %v", err)
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}
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_, ok := frame.(*http2.SettingsFrame)
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if !ok {
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ct.t.Errorf("initial frame sent from client is not a settings frame, type %T", frame)
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}
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}
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func (ct *clientTester) writeSettingsFrame() {
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if err := ct.fr.WriteSettings(); err != nil {
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ct.t.Fatalf("Error writing initial SETTINGS frame from client to server: %v", err)
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}
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}
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func (ct *clientTester) writeSettingsAck() {
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if err := ct.fr.WriteSettingsAck(); err != nil {
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ct.t.Fatalf("Error writing ACK of client's SETTINGS: %v", err)
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}
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}
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func (ct *clientTester) writeGoAway(maxStreamID uint32, code http2.ErrCode, debugData []byte) {
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if err := ct.fr.WriteGoAway(maxStreamID, code, debugData); err != nil {
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ct.t.Fatalf("Error writing GOAWAY: %v", err)
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}
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}
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