handy command line util for looking into JSON files - based on JSONPath npm module

jsonpath.js

#!/usr/bin/env node

var fs = require('fs');
var jsonpath = require('JSONPath');


if (process.argv.length<3)
{
    console.log('usage: jsonpath json_filename json_path_expr');
    exit;
}

var sfile = process.argv[2];
var spath = process.argv[3];

var cont = fs.readFileSync(sfile);
var obj = JSON.parse(cont);

var res = jsonpath.eval(obj, spath);

console.log(res);

Nice, short code. It would be cool if this could be adapted to be used as a pipe, such that if another app is piping a stream of json data to it, the json_filename would not be used, instead getting the data from the stream. I've never used Node, would that be an easy change?

Here's a quick fix if your result object has too many layers of nesting, and console.log truncates them with [Object]. Change the last line to:

console.log(JSON.stringify(res));