Write global object to file from node application

Question

I am trying to write the global object to file from a node application.

As a starting point I know that writing Function('return this') in the console outputs the global object with all members.

So I am trying the following:

var fs = require("fs");
fs.writeFile("/Users/myuser/Desktop/log.txt", Function('return this')());

But it just writes [object global] to the file

Thank you for trying to help. I get "Uncaught exception: TypeError: Converting circular structure to JSON at JSON.stringify(<anonymous>)..." — user1283776
– user1283776, Commented Aug 24, 2017 at 9:13
If you're trying to JSON.stringify circular object, try this function stackoverflow.com/a/31557814/1951115 — Muhamed Krlić
– Muhamed Krlić, Commented Aug 24, 2017 at 9:17

Adam Azad · Accepted Answer · 2017-08-24 09:06:57Z

2

You must pass a string to the body of the file you write to. Use

JSON.stringify(myObj)

Assuming Function return an object, you can do this:

var body = JSON.stringify( Function('return this')() );

fs.writeFile("/Users/myuser/Desktop/log.txt", body);

You should put a failsafe check also.

answered Aug 24, 2017 at 9:03

Adam Azad

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2 Comments

Thank you for trying to help. I get "Uncaught exception: TypeError: Converting circular structure to JSON at JSON.stringify(<anonymous>)..."

@user1283776, could you please put the full snippet? The output Function as well if short to include in the question.