Enquote file path for shell execution.

Also, fix json of 500 response.

api/swagger.yaml

@@ -324,6 +324,10 @@ paths:
                       $ref: "#/components/schemas/FileHeader"
         "401":
           $ref: "#/components/responses/Unauthorized"
+        "404":
+          $ref: "#/components/responses/NotFound"
+        "500":
+          $ref: "#/components/responses/InternalServerError"
     patch:
       summary: Manipulate runner file system
       description: Delete the files with the given paths from the file system of the specified runner. Afterwards, copy the enclosed files to the runner. Existing files get overwritten and results of previous file copy operations on the same runner are present when executing multiple requests.

internal/api/runners.go

@@ -95,7 +95,11 @@ func (r *RunnerController) listFileSystem(writer http.ResponseWriter, request *h
 	}
 
 	writer.Header().Set("Content-Type", "application/json")
-	if err := targetRunner.ListFileSystem(path, recursive, writer, request.Context()); err != nil {
+	err = targetRunner.ListFileSystem(path, recursive, writer, request.Context())
+	if errors.Is(err, runner.ErrFileNotFound) {
+		writeNotFound(writer, err)
+		return
+	} else if err != nil {
 		log.WithError(err).Error("Could not perform the requested listFileSystem.")
 		writeInternalServerError(writer, err, dto.ErrorUnknown)
 		return

internal/runner/nomad_runner.go

@@ -127,7 +127,7 @@ func (r *NomadJob) ListFileSystem(path string, recursive bool, content io.Writer
 
 	ls2json := &nullio.Ls2JsonWriter{Target: content}
 	defer ls2json.Close()
-	retrieveCommand := (&dto.ExecutionRequest{Command: fmt.Sprintf("%s %s", command, path)}).FullCommand()
+	retrieveCommand := (&dto.ExecutionRequest{Command: fmt.Sprintf("%s %q", command, path)}).FullCommand()
 	exitCode, err := r.api.ExecuteCommand(r.id, ctx, retrieveCommand, false, &nullio.Reader{}, ls2json, io.Discard)
 	if err != nil {
 		return fmt.Errorf("%w: nomad error during retrieve file headers: %v",
@@ -175,7 +175,7 @@ func (r *NomadJob) UpdateFileSystem(copyRequest *dto.UpdateFileSystemRequest) er
 func (r *NomadJob) GetFileContent(path string, content io.Writer, ctx context.Context) error {
 	r.ResetTimeout()
 
-	retrieveCommand := (&dto.ExecutionRequest{Command: fmt.Sprintf("cat %s", path)}).FullCommand()
+	retrieveCommand := (&dto.ExecutionRequest{Command: fmt.Sprintf("cat %q", path)}).FullCommand()
 	// Improve: Instead of using io.Discard use a **fixed-sized** buffer. With that we could improve the error message.
 	exitCode, err := r.api.ExecuteCommand(r.id, ctx, retrieveCommand, false, &nullio.Reader{}, content, io.Discard)
 

pkg/nullio/ls2json.go

@@ -76,10 +76,12 @@ func (w *Ls2JsonWriter) initializeJSONObject() (count int, err error) {
 }
 
 func (w *Ls2JsonWriter) Close() {
+	if w.jsonStartSend {
 		count, err := w.Target.Write([]byte("]}"))
 		if count == 0 || err != nil {
 			log.WithError(err).Warn("Could not Close ls2json writer")
 		}
+	}
 }
 
 func (w *Ls2JsonWriter) writeLine(line []byte) (count int, err error) {