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javascriptnode.jssubprocess

Pass a Buffer to a Node.js Child Process

After I went through the documentation for Node.js Child Processes, I was curious If it would be possible to pass a Buffer to this Process.

https://nodejs.org/api/child_process.html

For me it seems like I only can pass Strings? How can I pass Buffers or Objects? Thanks!

Solution

  • You can pass only Buffer or string.

    var node = require('child_process').spawn('node',['-i']);
node.stdout.on('data',function(data) {
    console.log('child:: '+String(data));
});

var buf = new Buffer('console.log("Woof!") || "Osom\x05";\x0dprocess.exit();\x0d');
console.log('OUT:: ',buf.toString())
node.stdin.write(buf);

    Output:

    OUT::  console.log("Woof!") || "Osom♣";
process.exit();
child:: >
child:: Woof!

child:: 'Osom\u0005'

child:: >

    Because .stdin is writable stream.

    \x0d(CR) is an 'Enter' simulation in interactive mode.