nodejsHow to log to file
const fs = require('fs');
const logger = new console.Console({
stdout: fs.createWriteStream('/tmp/out.log'),
stderr: fs.createWriteStream('/tmp/err.log')
});
logger.log('hi, I am message');
logger.error('I AM ERROR HA HA HA');ctrl + crequire('fs')library to work with file system | new console.Consolecreate new Console object to log data |
fs.createWriteStreamopen file and create writing stream from it | stdoutset stream (file) to write standard messages to |
stderrset stream (file) to write errors to | logger.loglog standard message |
logger.errorlog error | |
Usage example
cat /tmp/err.logoutput
I AM ERROR HA HA HAMore of Nodejs
- How to run Node.js script in background
- How to set content type in HTTP server
- How to pipeline streams
- How to post url-encoded data
- How to send JSON response from HTTP server
- How to send message to client from websocket server
- How to write file
- How to read stream to Buffer
- How to convert unix timestamp to local date/time
- How to make GET request
See more codes...