regex to get some JSON inside test

Question

I have some texts formatted in this way:

var string = 'some random text fjijd {"Type":"NewTunnel","Payload":{"ReqId":"e425ebb50d220816","Url":"asaa","Protocol":"http","Error":""}} some other text bla bla'

I am wondering how can i extract the json stringified object that can be parsed then with a regex.

Update

I am running a sub process from node.js application using spawn and the stdout data (that is application log -log=stdout ) in plain text formatted in this way. Don't ask me how and why, sorry!

var cproc = require("child_process");
proc = cproc.spawn("./ngrok", ['-log=stdout', '8080']);
proc.stdout.on("data", function(res) {
  console.log("Data received: " + res);
});

Data received is plain text, something like this:

[08/10/14 01:49:37] [DEBG] [ctl:604a481c] Read message {"Type":"ReqProxy","Payload":{}}

It includes also debugging infos!

Answer 1

Last update: yet another solution

/((?:{).*(?:}))/g

---

The initial answer:

What about this. I believe you need only the JSON part within this string. If you don't expect nested object the pattern could be changed to /({.*?})/g

var s = 'some random text fjijd {"Type":"NewTunnel","Payload":{"ReqId":"e425ebb50d220816","Url":"asaa","Protocol":"http","Error":""}} some other text bla bla';
var m = s.match(/({.*})/g);  // or /({+.*}+)/g  or /(({+).*(}+))/g
console.log(m[0]);

Output:

{"Type":"NewTunnel","Payload":{"ReqId":"e425ebb50d220816","Url":"asaa","Protocol":"http","Error":""}}

Demo1 | Demo2

Answer 2

You can use this regex:

({.*})

Working demo