accepting input from a pipe, nodejs

pipeaccept.js

  var data = '';

  if (process.stdin.writable) {
    process.stdin.resume();
    process.stdin.setEncoding('utf8');

    process.stdin.on('data', function(chunk) {
      data += chunk;
    });

    process.stdin.on('end', function() {
      callback(data)
    });
  }