Init commit of jobs output/error message peek project.

src/frontend/apiserver/backend/config.go

@@ -8,3 +8,10 @@ type BackendConfig struct {
 	From    string // identity sent to controller (default: "xce_apiserver")
 	Key     string // authentication key
 }
+
+// FetchFileResult holds the data returned by FetchFile.
+type FetchFileResult struct {
+	Content   []byte
+	FileSize  uint64
+	BytesRead uint32
+}