Node Roundup: 0.8.17, 0.9.6, gelf-node, jsong, Stuff.js

16 Jan 2013 | By Alex Young | Tags node modules unix cli json sandbox search
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Node 0.8.17, 0.9.6 (Unstable)

Node 0.8.17 was released last week with a security fix for TypedArrays, so you should upgrade if you’re using them:

If user input can affect the size parameter in a TypedArray, an integer overflow vulnerability could allow an attacker to write to areas of memory outside the intended buffer.

The unstable branch also saw a new release with 0.9.6. The streams API has changed slightly again as it continues to be developed: Isaac Schlueter added the readable.push method, and there are also fixes for TypedArrays in this branch too.

gelf-node

I’ve had a lot of luck with ElasticSearch. The last time I used it was on a project that used Node HTTP crawlers to index thousands of sites, and it was all backed by ElasticSearch. It worked extremely well and I actually got paid! If you’re also using ElasticSearch, then you might be interested in the gelf-node module (GitHub: robertkowalski / gelf-node, License: MIT, npm: gelf) by Robert Kowalski. It works with Graylog2, allowing messages to be sent from Node:

var Gelf = require('gelf');
var gelf = new Gelf({
  graylogPort: 12201,
  graylogHostname: '127.0.0.1',
  connection: 'wan',
  maxChunkSizeWan: 1420,
  maxChunkSizeLan: 8154
});

// The readme has an example message
gelf.emit('gelf.log', message);

Graylog2 itself is released under the GPL (version 3).

jsong

jsong (GitHub: textgoeshere / jsong, npm: jsong, License: MIT) by Dave Nolan is a CLI tool and module for filtering JSON. It’s built with streamin and clarinet, and shows full paths to matches:

$ cat my.json | jsong -k 'z\wp'

foo.bar.zip: val1
foo.bar.zap: val2
quux.zip: val

Because it’s built using streams, it should handle large JSON files.

Stuff.js

Here’s another project by Amjad Masad from Codecademy: Stuff.js (GitHub: Codecademy / stuff.js, License: MIT) – an easy way to run arbitrary HTML and JavaScript in an iframe. It uses node-static and uglify-js to create a sandbox for securely running user-contributed code.

There’s an example in Amjad’s blog post that shows how to use it:

stuff(secureIframeUrl, function (context) {
  var html = CodeMirror.fromTextArea($('#html'), {
    onChange: reload
  , mode: 'text/html'
  });
  var js = CodeMirror.fromTextArea($('#js'), {
    onChange: reload
  , mode: 'javascript'
  });
  var css = CodeMirror.fromTextArea($('#css'), {
    onChange: reload
  , mode: 'css'
  });

  var t = null;
  function reload () {
    clearTimeout(t);
    t = setTimeout(function () {
      var code = '<!DOCTYPE html><html><head>';
      code += '<style>'  + css.getValue() + '</style>';
      code += '<body>' + html.getValue();
      code += '<script>' + js.getValue() + '</script>';
      code += '</body></html>';
      context.load(code);
    }, 50);
  }
  reload();
});

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