package connection import ( "context" "fmt" "io" "math/rand" "net/http" "time" "github.com/rs/zerolog" "github.com/cloudflare/cloudflared/stream" "github.com/cloudflare/cloudflared/tracing" tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs" "github.com/cloudflare/cloudflared/websocket" ) const ( largeFileSize = 2 * 1024 * 1024 testGracePeriod = time.Millisecond * 100 ) var ( testOrchestrator = &mockOrchestrator{ originProxy: &mockOriginProxy{}, } log = zerolog.Nop() testLargeResp = make([]byte, largeFileSize) ) var _ ReadWriteAcker = (*HTTPResponseReadWriteAcker)(nil) type testRequest struct { name string endpoint string expectedStatus int expectedBody []byte isProxyError bool } type mockOrchestrator struct { originProxy OriginProxy } func (mcr *mockOrchestrator) GetConfigJSON() ([]byte, error) { return nil, fmt.Errorf("not implemented") } func (*mockOrchestrator) UpdateConfig(version int32, config []byte) *tunnelpogs.UpdateConfigurationResponse { return &tunnelpogs.UpdateConfigurationResponse{ LastAppliedVersion: version, } } func (mcr *mockOrchestrator) GetOriginProxy() (OriginProxy, error) { return mcr.originProxy, nil } func (mcr *mockOrchestrator) WarpRoutingEnabled() (enabled bool) { return true } type mockOriginProxy struct{} func (moc *mockOriginProxy) ProxyHTTP( w ResponseWriter, tr *tracing.TracedHTTPRequest, isWebsocket bool, ) error { req := tr.Request if isWebsocket { switch req.URL.Path { case "/ws/echo": return wsEchoEndpoint(w, req) case "/ws/flaky": return wsFlakyEndpoint(w, req) default: originRespEndpoint(w, http.StatusNotFound, []byte("ws endpoint not found")) return fmt.Errorf("Unknwon websocket endpoint %s", req.URL.Path) } } switch req.URL.Path { case "/ok": originRespEndpoint(w, http.StatusOK, []byte(http.StatusText(http.StatusOK))) case "/large_file": originRespEndpoint(w, http.StatusOK, testLargeResp) case "/400": originRespEndpoint(w, http.StatusBadRequest, []byte(http.StatusText(http.StatusBadRequest))) case "/500": originRespEndpoint(w, http.StatusInternalServerError, []byte(http.StatusText(http.StatusInternalServerError))) case "/error": return fmt.Errorf("Failed to proxy to origin") default: originRespEndpoint(w, http.StatusNotFound, []byte("page not found")) } return nil } func (moc *mockOriginProxy) ProxyTCP( ctx context.Context, rwa ReadWriteAcker, r *TCPRequest, ) error { return nil } type echoPipe struct { reader *io.PipeReader writer *io.PipeWriter } func (ep *echoPipe) Read(p []byte) (int, error) { return ep.reader.Read(p) } func (ep *echoPipe) Write(p []byte) (int, error) { return ep.writer.Write(p) } // A mock origin that echos data by streaming like a tcpOverWSConnection // https://github.com/cloudflare/cloudflared/blob/master/ingress/origin_connection.go func wsEchoEndpoint(w ResponseWriter, r *http.Request) error { resp := &http.Response{ StatusCode: http.StatusSwitchingProtocols, } if err := w.WriteRespHeaders(resp.StatusCode, resp.Header); err != nil { return err } wsCtx, cancel := context.WithCancel(r.Context()) readPipe, writePipe := io.Pipe() wsConn := websocket.NewConn(wsCtx, NewHTTPResponseReadWriterAcker(w, w.(http.Flusher), r), &log) go func() { select { case <-wsCtx.Done(): case <-r.Context().Done(): } readPipe.Close() writePipe.Close() }() originConn := &echoPipe{reader: readPipe, writer: writePipe} stream.Pipe(wsConn, originConn, &log) cancel() wsConn.Close() return nil } type flakyConn struct { closeAt time.Time } func (fc *flakyConn) Read(p []byte) (int, error) { if time.Now().After(fc.closeAt) { return 0, io.EOF } n := copy(p, "Read from flaky connection") return n, nil } func (fc *flakyConn) Write(p []byte) (int, error) { if time.Now().After(fc.closeAt) { return 0, fmt.Errorf("flaky connection closed") } return len(p), nil } func wsFlakyEndpoint(w ResponseWriter, r *http.Request) error { resp := &http.Response{ StatusCode: http.StatusSwitchingProtocols, } if err := w.WriteRespHeaders(resp.StatusCode, resp.Header); err != nil { return err } wsCtx, cancel := context.WithCancel(r.Context()) wsConn := websocket.NewConn(wsCtx, NewHTTPResponseReadWriterAcker(w, w.(http.Flusher), r), &log) closedAfter := time.Millisecond * time.Duration(rand.Intn(50)) originConn := &flakyConn{closeAt: time.Now().Add(closedAfter)} stream.Pipe(wsConn, originConn, &log) cancel() wsConn.Close() return nil } func originRespEndpoint(w ResponseWriter, status int, data []byte) { resp := &http.Response{ StatusCode: status, } _ = w.WriteRespHeaders(resp.StatusCode, resp.Header) _, _ = w.Write(data) } type mockConnectedFuse struct{} func (mcf mockConnectedFuse) Connected() {} func (mcf mockConnectedFuse) IsConnected() bool { return true }