Redirecting stdout to file nodejs

Question

I've created:

var access = fs.createWriteStream('/var/log/node/api.access.log', { flags: 'w' }); 

Then piped:

process.stdout.pipe(access); 

Then tried:

console.log("test"); 

And nothing has appeared in /var/log/node/api.access.log. However this way is working:

process.stdout.pipe(access).write('test'); 

Could someone explain what am I doing wrong ?

Answer 1

I solved this problem the following way:

var access = fs.createWriteStream('/var/log/node/api.access.log'); process.stdout.write = process.stderr.write = access.write.bind(access); 

Of course you can also separate stdout and stderr if you want.

I also would strongly recommend to handle uncaught exceptions:

process.on('uncaughtException', function(err) {   console.error((err && err.stack) ? err.stack : err); }); 

This will cover the following situations:

• process.stdout.write
• process.stderr.write
• console.log
• console.dir
• console.error
• someStream.pipe(process.stdout);
• throw new Error('Crash');
• throw 'never do this';
• throw undefined;