func (m methodREQToFile) handler(proc process, message Message, node string) ([]byte, error) { // If it was a request type message we want to check what the initial messages // method, so we can use that in creating the file name to store the data. fileName, folderTree := selectFileNaming(message, proc) // Check if folder structure exist, if not create it. if _, err := os.Stat(folderTree); os.IsNotExist(err) { err := os.MkdirAll(folderTree, 0770) if err != nil { er := fmt.Errorf("error: methodREQToFile failed to create toFile directory tree: subject:%v, folderTree: %v, %v", proc.subject, folderTree, err) proc.errorKernel.errSend(proc, message, er, logWarning) return nil, er } er := fmt.Errorf("info: Creating subscribers data folder at %v", folderTree) proc.errorKernel.logDebug(er, proc.configuration) } // Open file and write data. file := filepath.Join(folderTree, fileName) f, err := os.OpenFile(file, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0755) if err != nil { er := fmt.Errorf("error: methodREQToFile.handler: failed to open file, check that you've specified a value for fileName in the message: directory: %v, fileName: %v, %v", message.Directory, message.FileName, err) proc.errorKernel.errSend(proc, message, er, logWarning) return nil, err } defer f.Close() _, err = f.Write(message.Data) f.Sync() if err != nil { er := fmt.Errorf("error: methodEventTextLogging.handler: failed to write to file: file: %v, %v", file, err) proc.errorKernel.errSend(proc, message, er, logWarning) } ackMsg := []byte("confirmed from: " + node + ": " + fmt.Sprint(message.ID)) return ackMsg, nil }