Address remaining code review comments

- Fix potential open redirect vulnerability by sanitizing uploadLocation path
- Add language specifier to README code block
- Handle os.Create errors in test setup
- Use waitForHTTPServer instead of time.Sleep for master/volume readiness
- Improve test reliability and debugging

3 files changed, 36 insertions, 10 deletions

diff --git a/test/tus/README.md b/test/tus/README.md
index cd014229e..03c980a3d 100644
--- a/test/tus/README.md
+++ b/test/tus/README.md
@@ -201,7 +201,7 @@ curl -X DELETE http://localhost:18888/.tus/.uploads/{upload-id} \
 
 ## Architecture
 
-```
+```text
 Client                         Filer                      Volume Servers
   |                              |                              |
   |-- POST /.tus/path/file.mp4 ->|                              |
diff --git a/test/tus/tus_integration_test.go b/test/tus/tus_integration_test.go
index b2c9bb8e8..75763344b 100644
--- a/test/tus/tus_integration_test.go
+++ b/test/tus/tus_integration_test.go
@@ -93,7 +93,11 @@ func startTestCluster(t *testing.T, ctx context.Context) (*TestCluster, error) {
 		"-mdir", masterDir,
 		"-ip", "127.0.0.1",
 	)
-	masterLogFile, _ := os.Create(filepath.Join(masterDir, "master.log"))
+	masterLogFile, err := os.Create(filepath.Join(masterDir, "master.log"))
+	if err != nil {
+		os.RemoveAll(dataDir)
+		return nil, fmt.Errorf("failed to create master log: %v", err)
+	}
 	masterCmd.Stdout = masterLogFile
 	masterCmd.Stderr = masterLogFile
 	if err := masterCmd.Start(); err != nil {
@@ -102,8 +106,12 @@ func startTestCluster(t *testing.T, ctx context.Context) (*TestCluster, error) {
 	}
 	cluster.masterCmd = masterCmd
 
-	// Wait for master
-	time.Sleep(2 * time.Second)
+	// Wait for master to be ready
+	if err := waitForHTTPServer("http://127.0.0.1:"+testMasterPort+"/dir/status", 30*time.Second); err != nil {
+		cluster.Stop()
+		os.RemoveAll(dataDir)
+		return nil, fmt.Errorf("master not ready: %v", err)
+	}
 
 	// Start volume server
 	volumeCmd := exec.CommandContext(ctx, weedBinary, "volume",
@@ -112,7 +120,12 @@ func startTestCluster(t *testing.T, ctx context.Context) (*TestCluster, error) {
 		"-mserver", "127.0.0.1:"+testMasterPort,
 		"-ip", "127.0.0.1",
 	)
-	volumeLogFile, _ := os.Create(filepath.Join(volumeDir, "volume.log"))
+	volumeLogFile, err := os.Create(filepath.Join(volumeDir, "volume.log"))
+	if err != nil {
+		cluster.Stop()
+		os.RemoveAll(dataDir)
+		return nil, fmt.Errorf("failed to create volume log: %v", err)
+	}
 	volumeCmd.Stdout = volumeLogFile
 	volumeCmd.Stderr = volumeLogFile
 	if err := volumeCmd.Start(); err != nil {
@@ -122,8 +135,12 @@ func startTestCluster(t *testing.T, ctx context.Context) (*TestCluster, error) {
 	}
 	cluster.volumeCmd = volumeCmd
 
-	// Wait for volume server
-	time.Sleep(2 * time.Second)
+	// Wait for volume server to register with master
+	if err := waitForHTTPServer("http://127.0.0.1:"+testVolumePort+"/status", 30*time.Second); err != nil {
+		cluster.Stop()
+		os.RemoveAll(dataDir)
+		return nil, fmt.Errorf("volume server not ready: %v", err)
+	}
 
 	// Start filer with TUS enabled
 	filerCmd := exec.CommandContext(ctx, weedBinary, "filer",
@@ -132,7 +149,12 @@ func startTestCluster(t *testing.T, ctx context.Context) (*TestCluster, error) {
 		"-ip", "127.0.0.1",
 		"-dataCenter", "dc1",
 	)
-	filerLogFile, _ := os.Create(filepath.Join(filerDir, "filer.log"))
+	filerLogFile, err := os.Create(filepath.Join(filerDir, "filer.log"))
+	if err != nil {
+		cluster.Stop()
+		os.RemoveAll(dataDir)
+		return nil, fmt.Errorf("failed to create filer log: %v", err)
+	}
 	filerCmd.Stdout = filerLogFile
 	filerCmd.Stderr = filerLogFile
 	if err := filerCmd.Start(); err != nil {
diff --git a/weed/server/filer_server_tus_handlers.go b/weed/server/filer_server_tus_handlers.go
index f4fa5959e..7411b2527 100644
--- a/weed/server/filer_server_tus_handlers.go
+++ b/weed/server/filer_server_tus_handlers.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"path"
 	"strconv"
 	"strings"
 	"time"
@@ -131,8 +132,11 @@ func (fs *FilerServer) tusCreateHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	// Build upload location URL
-	uploadLocation := fmt.Sprintf("%s/.uploads/%s", tusPrefix, uploadID)
+	// Build upload location URL (ensure it starts with single /)
+	uploadLocation := path.Clean(fmt.Sprintf("%s/.uploads/%s", tusPrefix, uploadID))
+	if !strings.HasPrefix(uploadLocation, "/") {
+		uploadLocation = "/" + uploadLocation
+	}
 
 	// Handle creation-with-upload extension
 	if r.ContentLength > 0 && r.Header.Get("Content-Type") == "application/offset+octet-stream" {