safe-read-write

Uses lockfile and mz to safely read and write simple text files.

Use case: Needed for a node based http server application that does many small read/write operations. The server accepts requests and returns a 202 - Accepted. The server contains a worker process that is executed using spawn that does a potenaillay long (up to many minutes) process; during the process, the worker writes status information in JSON to a file. The client then polls for the status could get malformed JSON without safe-read-write.

Install, develop, test, use

# install
npm install safe-read-write

# develop
npm run compile
npm run dev # watch

# test
npm test
npm run tdd # watch

# use
const saferw = require('safe-read-write');
import saferw from 'safe-read-write';

...

safeWrite('/path/to/textfile', 'text content', 'utf8');

...

safeRead('/path/to/textfile')
  .then(data => ...);