switch file cat to use new modern streaming, remove file limit

Author: sawka

cmd/wsh/cmd/wshcmd-file-util.go

@@ -1,4 +1,4 @@
-// Copyright 2025, Command Line Inc.
+// Copyright 2026, Command Line Inc.
 // SPDX-License-Identifier: Apache-2.0
 
 package cmd
@@ -12,10 +12,10 @@ import (
 	"strings"
 
 	"github.com/wavetermdev/waveterm/pkg/remote/connparse"
-	"github.com/wavetermdev/waveterm/pkg/remote/fileshare/fsutil"
 	"github.com/wavetermdev/waveterm/pkg/util/fileutil"
 	"github.com/wavetermdev/waveterm/pkg/wshrpc"
 	"github.com/wavetermdev/waveterm/pkg/wshrpc/wshclient"
+	"github.com/wavetermdev/waveterm/pkg/wshutil"
 )
 
 func convertNotFoundErr(err error) error {
@@ -91,8 +91,38 @@ func streamWriteToFile(fileData wshrpc.FileData, reader io.Reader) error {
 }
 
 func streamReadFromFile(ctx context.Context, fileData wshrpc.FileData, writer io.Writer) error {
-	ch := wshclient.FileReadStreamCommand(RpcClient, fileData, &wshrpc.RpcOpts{Timeout: fileTimeout})
-	return fsutil.ReadFileStreamToWriter(ctx, ch, writer)
+	broker := RpcClient.StreamBroker
+	if broker == nil {
+		return fmt.Errorf("stream broker not available")
+	}
+	if fileData.Info == nil {
+		return fmt.Errorf("file info is required")
+	}
+	readerRouteId := RpcClientRouteId
+	if readerRouteId == "" {
+		return fmt.Errorf("no route id available")
+	}
+	conn, err := connparse.ParseURI(fileData.Info.Path)
+	if err != nil {
+		return fmt.Errorf("parsing file path: %w", err)
+	}
+	writerRouteId := wshutil.MakeConnectionRouteId(conn.Host)
+	reader, streamMeta := broker.CreateStreamReader(readerRouteId, writerRouteId, 256*1024)
+	defer reader.Close()
+	go func() {
+		<-ctx.Done()
+		reader.Close()
+	}()
+	data := wshrpc.CommandFileStreamData{
+		Info:       fileData.Info,
+		StreamMeta: *streamMeta,
+	}
+	_, err = wshclient.FileStreamCommand(RpcClient, data, nil)
+	if err != nil {
+		return fmt.Errorf("starting file stream: %w", err)
+	}
+	_, err = io.Copy(writer, reader)
+	return err
 }
 
 func fixRelativePaths(path string) (string, error) {

cmd/wsh/cmd/wshcmd-file.go

@@ -172,11 +172,6 @@ func fileCatRun(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	_, err = checkFileSize(path, MaxFileSize)
-	if err != nil {
-		return err
-	}
-
 	fileData := wshrpc.FileData{
 		Info: &wshrpc.FileInfo{
 			Path: path}}

cmd/wsh/cmd/wshcmd-root.go

@@ -31,6 +31,7 @@ var WrappedStdout io.Writer = &WrappedWriter{dest: os.Stdout}
 var WrappedStderr io.Writer = &WrappedWriter{dest: os.Stderr}
 var RpcClient *wshutil.WshRpc
 var RpcContext wshrpc.RpcContext
+var RpcClientRouteId string
 var UsingTermWshMode bool
 var blockArg string
 var WshExitCode int
@@ -140,7 +141,12 @@ func setupRpcClientWithToken(swapTokenStr string) (wshrpc.CommandAuthenticateRtn
 	if err != nil {
 		return rtn, fmt.Errorf("error setting up domain socket rpc client: %w", err)
 	}
-	return wshclient.AuthenticateTokenCommand(RpcClient, wshrpc.CommandAuthenticateTokenData{Token: token.Token}, &wshrpc.RpcOpts{Route: wshutil.ControlRoute})
+	rtn, err = wshclient.AuthenticateTokenCommand(RpcClient, wshrpc.CommandAuthenticateTokenData{Token: token.Token}, &wshrpc.RpcOpts{Route: wshutil.ControlRoute})
+	if err != nil {
+		return rtn, err
+	}
+	RpcClientRouteId = rtn.RouteId
+	return rtn, nil
 }
 
 // returns the wrapped stdin and a new rpc client (that wraps the stdin input and stdout output)
@@ -158,10 +164,11 @@ func setupRpcClient(serverImpl wshutil.ServerImpl, jwtToken string) error {
 	if err != nil {
 		return fmt.Errorf("error setting up domain socket rpc client: %v", err)
 	}
-	_, err = wshclient.AuthenticateCommand(RpcClient, jwtToken, &wshrpc.RpcOpts{Route: wshutil.ControlRoute})
+	authRtn, err := wshclient.AuthenticateCommand(RpcClient, jwtToken, &wshrpc.RpcOpts{Route: wshutil.ControlRoute})
 	if err != nil {
 		return fmt.Errorf("error authenticating: %v", err)
 	}
+	RpcClientRouteId = authRtn.RouteId
 	blockId := os.Getenv("WAVETERM_BLOCKID")
 	if blockId != "" {
 		peerInfo := fmt.Sprintf("domain:block:%s", blockId)