707 lines
18 KiB
Go
707 lines
18 KiB
Go
package connection
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import (
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"bytes"
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"context"
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"crypto/tls"
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"fmt"
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"io"
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"net"
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"net/http"
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"net/url"
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"os"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/gobwas/ws/wsutil"
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"github.com/google/uuid"
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"github.com/lucas-clemente/quic-go"
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"github.com/pkg/errors"
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"github.com/rs/zerolog"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/cloudflare/cloudflared/datagramsession"
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quicpogs "github.com/cloudflare/cloudflared/quic"
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"github.com/cloudflare/cloudflared/tracing"
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"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
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tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs"
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)
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var (
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testTLSServerConfig = quicpogs.GenerateTLSConfig()
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testQUICConfig = &quic.Config{
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ConnectionIDLength: 16,
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KeepAlivePeriod: 5 * time.Second,
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EnableDatagrams: true,
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}
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)
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var _ ReadWriteAcker = (*streamReadWriteAcker)(nil)
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// TestQUICServer tests if a quic server accepts and responds to a quic client with the acceptance protocol.
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// It also serves as a demonstration for communication with the QUIC connection started by a cloudflared.
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func TestQUICServer(t *testing.T) {
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// Start a UDP Listener for QUIC.
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udpAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0")
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require.NoError(t, err)
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udpListener, err := net.ListenUDP(udpAddr.Network(), udpAddr)
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require.NoError(t, err)
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defer udpListener.Close()
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// This is simply a sample websocket frame message.
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wsBuf := &bytes.Buffer{}
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wsutil.WriteClientBinary(wsBuf, []byte("Hello"))
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var tests = []struct {
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desc string
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dest string
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connectionType quicpogs.ConnectionType
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metadata []quicpogs.Metadata
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message []byte
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expectedResponse []byte
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}{
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{
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desc: "test http proxy",
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dest: "/ok",
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connectionType: quicpogs.ConnectionTypeHTTP,
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metadata: []quicpogs.Metadata{
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{
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Key: "HttpHeader:Cf-Ray",
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Val: "123123123",
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},
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{
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Key: "HttpHost",
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Val: "cf.host",
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},
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{
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Key: "HttpMethod",
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Val: "GET",
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},
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},
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expectedResponse: []byte("OK"),
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},
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{
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desc: "test http body request streaming",
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dest: "/slow_echo_body",
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connectionType: quicpogs.ConnectionTypeHTTP,
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metadata: []quicpogs.Metadata{
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{
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Key: "HttpHeader:Cf-Ray",
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Val: "123123123",
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},
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{
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Key: "HttpHost",
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Val: "cf.host",
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},
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{
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Key: "HttpMethod",
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Val: "POST",
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},
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{
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Key: "HttpHeader:Content-Length",
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Val: "24",
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},
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},
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message: []byte("This is the message body"),
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expectedResponse: []byte("This is the message body"),
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},
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{
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desc: "test ws proxy",
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dest: "/ws/echo",
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connectionType: quicpogs.ConnectionTypeWebsocket,
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metadata: []quicpogs.Metadata{
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{
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Key: "HttpHeader:Cf-Cloudflared-Proxy-Connection-Upgrade",
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Val: "Websocket",
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},
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{
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Key: "HttpHeader:Another-Header",
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Val: "Misc",
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},
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{
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Key: "HttpHost",
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Val: "cf.host",
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},
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{
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Key: "HttpMethod",
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Val: "get",
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},
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},
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message: wsBuf.Bytes(),
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expectedResponse: []byte{0x82, 0x5, 0x48, 0x65, 0x6c, 0x6c, 0x6f},
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},
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{
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desc: "test tcp proxy",
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connectionType: quicpogs.ConnectionTypeTCP,
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metadata: []quicpogs.Metadata{},
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message: []byte("Here is some tcp data"),
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expectedResponse: []byte("Here is some tcp data"),
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},
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}
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for _, test := range tests {
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t.Run(test.desc, func(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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quicServer(
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t, udpListener, testTLSServerConfig, testQUICConfig,
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test.dest, test.connectionType, test.metadata, test.message, test.expectedResponse,
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)
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}()
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qc := testQUICConnection(udpListener.LocalAddr(), t)
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go qc.Serve(ctx)
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wg.Wait()
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cancel()
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})
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}
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}
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type fakeControlStream struct {
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ControlStreamHandler
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}
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func (fakeControlStream) ServeControlStream(ctx context.Context, rw io.ReadWriteCloser, connOptions *tunnelpogs.ConnectionOptions, tunnelConfigGetter TunnelConfigJSONGetter) error {
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<-ctx.Done()
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return nil
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}
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func (fakeControlStream) IsStopped() bool {
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return true
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}
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func quicServer(
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t *testing.T,
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conn net.PacketConn,
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tlsConf *tls.Config,
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config *quic.Config,
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dest string,
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connectionType quicpogs.ConnectionType,
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metadata []quicpogs.Metadata,
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message []byte,
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expectedResponse []byte,
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) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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earlyListener, err := quic.Listen(conn, tlsConf, config)
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require.NoError(t, err)
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session, err := earlyListener.Accept(ctx)
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require.NoError(t, err)
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quicStream, err := session.OpenStreamSync(context.Background())
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require.NoError(t, err)
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stream := quicpogs.NewSafeStreamCloser(quicStream)
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reqClientStream := quicpogs.RequestClientStream{ReadWriteCloser: stream}
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err = reqClientStream.WriteConnectRequestData(dest, connectionType, metadata...)
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require.NoError(t, err)
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_, err = reqClientStream.ReadConnectResponseData()
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require.NoError(t, err)
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if message != nil {
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// ALPN successful. Write data.
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_, err := stream.Write(message)
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require.NoError(t, err)
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}
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response := make([]byte, len(expectedResponse))
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_, err = stream.Read(response)
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if err != io.EOF {
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require.NoError(t, err)
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}
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// For now it is an echo server. Verify if the same data is returned.
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assert.Equal(t, expectedResponse, response)
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}
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type mockOriginProxyWithRequest struct{}
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func (moc *mockOriginProxyWithRequest) ProxyHTTP(w ResponseWriter, tr *tracing.TracedHTTPRequest, isWebsocket bool) error {
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// These are a series of crude tests to ensure the headers and http related data is transferred from
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// metadata.
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r := tr.Request
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if r.Method == "" {
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return errors.New("method not sent")
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}
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if r.Host == "" {
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return errors.New("host not sent")
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}
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if len(r.Header) == 0 {
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return errors.New("headers not set")
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}
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if isWebsocket {
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return wsEchoEndpoint(w, r)
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}
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switch r.URL.Path {
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case "/ok":
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originRespEndpoint(w, http.StatusOK, []byte(http.StatusText(http.StatusOK)))
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case "/slow_echo_body":
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time.Sleep(5)
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fallthrough
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case "/echo_body":
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resp := &http.Response{
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StatusCode: http.StatusOK,
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}
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_ = w.WriteRespHeaders(resp.StatusCode, resp.Header)
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io.Copy(w, r.Body)
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case "/error":
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return fmt.Errorf("Failed to proxy to origin")
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default:
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originRespEndpoint(w, http.StatusNotFound, []byte("page not found"))
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}
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return nil
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}
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func TestBuildHTTPRequest(t *testing.T) {
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var tests = []struct {
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name string
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connectRequest *quicpogs.ConnectRequest
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body io.ReadCloser
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req *http.Request
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}{
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{
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name: "check if http.Request is built correctly with content length",
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connectRequest: &quicpogs.ConnectRequest{
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Dest: "http://test.com",
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Metadata: []quicpogs.Metadata{
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{
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Key: "HttpHeader:Cf-Cloudflared-Proxy-Connection-Upgrade",
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Val: "Websocket",
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},
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{
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Key: "HttpHeader:Content-Length",
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Val: "514",
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},
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{
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Key: "HttpHeader:Another-Header",
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Val: "Misc",
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},
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{
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Key: "HttpHost",
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Val: "cf.host",
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},
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{
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Key: "HttpMethod",
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Val: "get",
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},
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},
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},
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req: &http.Request{
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Method: "get",
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URL: &url.URL{
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Scheme: "http",
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Host: "test.com",
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},
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: http.Header{
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"Another-Header": []string{"Misc"},
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"Content-Length": []string{"514"},
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},
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ContentLength: 514,
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Host: "cf.host",
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Body: io.NopCloser(&bytes.Buffer{}),
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},
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body: io.NopCloser(&bytes.Buffer{}),
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},
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{
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name: "if content length isn't part of request headers, then it's not set",
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connectRequest: &quicpogs.ConnectRequest{
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Dest: "http://test.com",
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Metadata: []quicpogs.Metadata{
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{
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Key: "HttpHeader:Cf-Cloudflared-Proxy-Connection-Upgrade",
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Val: "Websocket",
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},
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{
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Key: "HttpHeader:Another-Header",
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Val: "Misc",
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},
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{
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Key: "HttpHost",
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Val: "cf.host",
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},
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{
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Key: "HttpMethod",
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Val: "get",
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},
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},
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},
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req: &http.Request{
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Method: "get",
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URL: &url.URL{
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Scheme: "http",
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Host: "test.com",
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},
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: http.Header{
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"Another-Header": []string{"Misc"},
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},
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ContentLength: 0,
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Host: "cf.host",
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Body: http.NoBody,
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},
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body: io.NopCloser(&bytes.Buffer{}),
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},
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{
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name: "if content length is 0, but transfer-encoding is chunked, body is not nil",
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connectRequest: &quicpogs.ConnectRequest{
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Dest: "http://test.com",
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Metadata: []quicpogs.Metadata{
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{
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Key: "HttpHeader:Another-Header",
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Val: "Misc",
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},
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{
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Key: "HttpHeader:Transfer-Encoding",
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Val: "chunked",
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},
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{
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Key: "HttpHost",
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Val: "cf.host",
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},
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{
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Key: "HttpMethod",
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Val: "get",
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},
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},
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},
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req: &http.Request{
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Method: "get",
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URL: &url.URL{
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Scheme: "http",
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Host: "test.com",
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},
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: http.Header{
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"Another-Header": []string{"Misc"},
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"Transfer-Encoding": []string{"chunked"},
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},
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ContentLength: 0,
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Host: "cf.host",
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Body: io.NopCloser(&bytes.Buffer{}),
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},
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body: io.NopCloser(&bytes.Buffer{}),
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},
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{
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name: "if content length is 0, but transfer-encoding is gzip,chunked, body is not nil",
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connectRequest: &quicpogs.ConnectRequest{
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Dest: "http://test.com",
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Metadata: []quicpogs.Metadata{
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{
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Key: "HttpHeader:Another-Header",
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Val: "Misc",
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},
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{
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Key: "HttpHeader:Transfer-Encoding",
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Val: "gzip,chunked",
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},
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{
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Key: "HttpHost",
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Val: "cf.host",
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},
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{
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Key: "HttpMethod",
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Val: "get",
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},
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},
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},
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req: &http.Request{
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Method: "get",
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URL: &url.URL{
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Scheme: "http",
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Host: "test.com",
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},
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: http.Header{
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"Another-Header": []string{"Misc"},
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"Transfer-Encoding": []string{"gzip,chunked"},
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},
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ContentLength: 0,
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Host: "cf.host",
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Body: io.NopCloser(&bytes.Buffer{}),
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},
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body: io.NopCloser(&bytes.Buffer{}),
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},
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{
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name: "if content length is 0, and connect request is a websocket, body is not nil",
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connectRequest: &quicpogs.ConnectRequest{
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Type: quicpogs.ConnectionTypeWebsocket,
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Dest: "http://test.com",
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Metadata: []quicpogs.Metadata{
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{
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Key: "HttpHeader:Another-Header",
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Val: "Misc",
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},
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{
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Key: "HttpHost",
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Val: "cf.host",
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},
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{
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Key: "HttpMethod",
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Val: "get",
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},
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},
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},
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req: &http.Request{
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Method: "get",
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URL: &url.URL{
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Scheme: "http",
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Host: "test.com",
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},
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Proto: "HTTP/1.1",
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: http.Header{
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"Another-Header": []string{"Misc"},
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},
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ContentLength: 0,
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Host: "cf.host",
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Body: io.NopCloser(&bytes.Buffer{}),
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},
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body: io.NopCloser(&bytes.Buffer{}),
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},
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}
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log := zerolog.Nop()
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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req, err := buildHTTPRequest(context.Background(), test.connectRequest, test.body, &log)
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assert.NoError(t, err)
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test.req = test.req.WithContext(req.Context())
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assert.Equal(t, test.req, req.Request)
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})
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}
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}
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func (moc *mockOriginProxyWithRequest) ProxyTCP(ctx context.Context, rwa ReadWriteAcker, tcpRequest *TCPRequest) error {
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rwa.AckConnection("")
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io.Copy(rwa, rwa)
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return nil
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}
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|
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func TestServeUDPSession(t *testing.T) {
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// Start a UDP Listener for QUIC.
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udpAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0")
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require.NoError(t, err)
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udpListener, err := net.ListenUDP(udpAddr.Network(), udpAddr)
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require.NoError(t, err)
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defer udpListener.Close()
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ctx, cancel := context.WithCancel(context.Background())
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val := udpListener.LocalAddr()
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|
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// Establish QUIC connection with edge
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edgeQUICSessionChan := make(chan quic.Connection)
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go func() {
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earlyListener, err := quic.Listen(udpListener, testTLSServerConfig, testQUICConfig)
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require.NoError(t, err)
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edgeQUICSession, err := earlyListener.Accept(ctx)
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require.NoError(t, err)
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edgeQUICSessionChan <- edgeQUICSession
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}()
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qc := testQUICConnection(val, t)
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go qc.Serve(ctx)
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edgeQUICSession := <-edgeQUICSessionChan
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serveSession(ctx, qc, edgeQUICSession, closedByOrigin, io.EOF.Error(), t)
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serveSession(ctx, qc, edgeQUICSession, closedByTimeout, datagramsession.SessionIdleErr(time.Millisecond*50).Error(), t)
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serveSession(ctx, qc, edgeQUICSession, closedByRemote, "eyeball closed connection", t)
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cancel()
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}
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func TestNopCloserReadWriterCloseBeforeEOF(t *testing.T) {
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readerWriter := nopCloserReadWriter{ReadWriteCloser: &mockReaderNoopWriter{Reader: strings.NewReader("123456789")}}
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buffer := make([]byte, 5)
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n, err := readerWriter.Read(buffer)
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require.NoError(t, err)
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require.Equal(t, n, 5)
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// close
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require.NoError(t, readerWriter.Close())
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// read should get error
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n, err = readerWriter.Read(buffer)
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require.Equal(t, n, 0)
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require.Equal(t, err, fmt.Errorf("closed by handler"))
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}
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func TestNopCloserReadWriterCloseAfterEOF(t *testing.T) {
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readerWriter := nopCloserReadWriter{ReadWriteCloser: &mockReaderNoopWriter{Reader: strings.NewReader("123456789")}}
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buffer := make([]byte, 20)
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n, err := readerWriter.Read(buffer)
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require.NoError(t, err)
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require.Equal(t, n, 9)
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// force another read to read eof
|
|
_, err = readerWriter.Read(buffer)
|
|
require.Equal(t, err, io.EOF)
|
|
|
|
// close
|
|
require.NoError(t, readerWriter.Close())
|
|
|
|
// read should get EOF still
|
|
n, err = readerWriter.Read(buffer)
|
|
require.Equal(t, n, 0)
|
|
require.Equal(t, err, io.EOF)
|
|
}
|
|
|
|
func serveSession(ctx context.Context, qc *QUICConnection, edgeQUICSession quic.Connection, closeType closeReason, expectedReason string, t *testing.T) {
|
|
var (
|
|
payload = []byte(t.Name())
|
|
)
|
|
sessionID := uuid.New()
|
|
cfdConn, originConn := net.Pipe()
|
|
// Registers and run a new session
|
|
session, err := qc.sessionManager.RegisterSession(ctx, sessionID, cfdConn)
|
|
require.NoError(t, err)
|
|
|
|
sessionDone := make(chan struct{})
|
|
go func() {
|
|
qc.serveUDPSession(session, time.Millisecond*50)
|
|
close(sessionDone)
|
|
}()
|
|
|
|
// Send a message to the quic session on edge side, it should be deumx to this datagram v2 session
|
|
muxedPayload, err := quicpogs.SuffixSessionID(sessionID, payload)
|
|
require.NoError(t, err)
|
|
muxedPayload, err = quicpogs.SuffixType(muxedPayload, quicpogs.DatagramTypeUDP)
|
|
require.NoError(t, err)
|
|
|
|
err = edgeQUICSession.SendMessage(muxedPayload)
|
|
require.NoError(t, err)
|
|
|
|
readBuffer := make([]byte, len(payload)+1)
|
|
n, err := originConn.Read(readBuffer)
|
|
require.NoError(t, err)
|
|
require.Equal(t, len(payload), n)
|
|
require.True(t, bytes.Equal(payload, readBuffer[:n]))
|
|
|
|
// Close connection to terminate session
|
|
switch closeType {
|
|
case closedByOrigin:
|
|
originConn.Close()
|
|
case closedByRemote:
|
|
err = qc.UnregisterUdpSession(ctx, sessionID, expectedReason)
|
|
require.NoError(t, err)
|
|
case closedByTimeout:
|
|
}
|
|
|
|
if closeType != closedByRemote {
|
|
// Session was not closed by remote, so closeUDPSession should be invoked to unregister from remote
|
|
unregisterFromEdgeChan := make(chan struct{})
|
|
sessionRPCServer := &mockSessionRPCServer{
|
|
sessionID: sessionID,
|
|
unregisterReason: expectedReason,
|
|
calledUnregisterChan: unregisterFromEdgeChan,
|
|
}
|
|
go runRPCServer(ctx, edgeQUICSession, sessionRPCServer, nil, t)
|
|
|
|
<-unregisterFromEdgeChan
|
|
}
|
|
|
|
<-sessionDone
|
|
}
|
|
|
|
type closeReason uint8
|
|
|
|
const (
|
|
closedByOrigin closeReason = iota
|
|
closedByRemote
|
|
closedByTimeout
|
|
)
|
|
|
|
func runRPCServer(ctx context.Context, session quic.Connection, sessionRPCServer tunnelpogs.SessionManager, configRPCServer tunnelpogs.ConfigurationManager, t *testing.T) {
|
|
stream, err := session.AcceptStream(ctx)
|
|
require.NoError(t, err)
|
|
|
|
if stream.StreamID() == 0 {
|
|
// Skip the first stream, it's the control stream of the QUIC connection
|
|
stream, err = session.AcceptStream(ctx)
|
|
require.NoError(t, err)
|
|
}
|
|
protocol, err := quicpogs.DetermineProtocol(stream)
|
|
assert.NoError(t, err)
|
|
rpcServerStream, err := quicpogs.NewRPCServerStream(stream, protocol)
|
|
assert.NoError(t, err)
|
|
|
|
log := zerolog.New(os.Stdout)
|
|
err = rpcServerStream.Serve(sessionRPCServer, configRPCServer, &log)
|
|
assert.NoError(t, err)
|
|
}
|
|
|
|
type mockSessionRPCServer struct {
|
|
sessionID uuid.UUID
|
|
unregisterReason string
|
|
calledUnregisterChan chan struct{}
|
|
}
|
|
|
|
func (s mockSessionRPCServer) RegisterUdpSession(ctx context.Context, sessionID uuid.UUID, dstIP net.IP, dstPort uint16, closeIdleAfter time.Duration, traceContext string) (*pogs.RegisterUdpSessionResponse, error) {
|
|
return nil, fmt.Errorf("mockSessionRPCServer doesn't implement RegisterUdpSession")
|
|
}
|
|
|
|
func (s mockSessionRPCServer) UnregisterUdpSession(ctx context.Context, sessionID uuid.UUID, reason string) error {
|
|
if s.sessionID != sessionID {
|
|
return fmt.Errorf("expect session ID %s, got %s", s.sessionID, sessionID)
|
|
}
|
|
if s.unregisterReason != reason {
|
|
return fmt.Errorf("expect unregister reason %s, got %s", s.unregisterReason, reason)
|
|
}
|
|
close(s.calledUnregisterChan)
|
|
return nil
|
|
}
|
|
|
|
func testQUICConnection(udpListenerAddr net.Addr, t *testing.T) *QUICConnection {
|
|
tlsClientConfig := &tls.Config{
|
|
InsecureSkipVerify: true,
|
|
NextProtos: []string{"argotunnel"},
|
|
}
|
|
// Start a mock httpProxy
|
|
log := zerolog.New(os.Stdout)
|
|
qc, err := NewQUICConnection(
|
|
testQUICConfig,
|
|
udpListenerAddr,
|
|
tlsClientConfig,
|
|
&mockOrchestrator{originProxy: &mockOriginProxyWithRequest{}},
|
|
&tunnelpogs.ConnectionOptions{},
|
|
fakeControlStream{},
|
|
&log,
|
|
nil,
|
|
)
|
|
require.NoError(t, err)
|
|
return qc
|
|
}
|
|
|
|
type mockReaderNoopWriter struct {
|
|
io.Reader
|
|
}
|
|
|
|
func (m *mockReaderNoopWriter) Write(p []byte) (n int, err error) {
|
|
return len(p), nil
|
|
}
|
|
|
|
func (m *mockReaderNoopWriter) Close() error {
|
|
return nil
|
|
}
|