Get-Json form local file

Question

I'm working on a small server (NodeJS environment) to get JSON data from a URL and a local file to compare these.

I'm using 'get-json' to load the JSON form the url and get some values, unfortunately it doesn't work for the local file.

I tried it with 'request' too.

var getJSON = require('get-json')
var localpath = "./location/file.json"

getJSON(localpath, function(data, allowed_content) {
  var a = allowed_content[0].age;
  var b = allowed_content[1].age;
  var c = allowed_content[2].age;
  var d = allowed_content[5].age;
  var e = allowed_content[6].age;
});

I can't figure it out why the local path isn't working.

Are you trying to do it in browser or in node.js environment? — Eltu, Jul 29 '19 at 10:06
Possible duplicate of [JQuery.getJSON() reading a local file](https://stackoverflow.com/questions/11297219/jquery-getjson-reading-a-local-file) — Sundeep Pidugu, Jul 29 '19 at 10:07
Read this : https://stackabuse.com/reading-and-writing-json-files-with-node-js/ — Sundeep Pidugu, Jul 29 '19 at 10:08
Just FYI, I removed the `local-storage` tag, because that refers to the `localStorage` object in browsers. — Reinstate Monica Cellio, Jul 29 '19 at 10:09

score 1 · Answer 1 · answered Jul 29 '19 at 10:07

1

You can simply use fetch function

var localpath = "./location/file.json"
    fetch(localpath)
    .then(response => response.json())
    .then(json => {
      console.log(json);
    });

answered Jul 29 '19 at 10:07

Saurabh Yadav

3,303
1
10
20

score 0 · Answer 2 · answered Jul 29 '19 at 10:16

0

tl;dr don't use get-json to read local files but use readFile

get-json is for network request, its docs says it wraps around requests in node, and uses JSONP on the browser. To read a local file just use readFile or readFileSync:

var { readFileSync } = require("fs");
var localPath = "";
var localFile = readFileSync(localPath, "utf8"); // utf8 is opts and depends on your setup, the async version of readFile takes a callback as last argument
console.log(JSON.parse(localFile));

answered Jul 29 '19 at 10:16

adz5A

2,012
9
10

It's working, now I need to figure out how I can get the specific values from the value. like "allowed_content[6].age" – Markde23 Jul 29 '19 at 12:34
Not sure I follow you. Calling `JSON.parse` on a string should return a JS object (or throw an error). Name the output `allowed_content` and you can access all its properties using regular syntax – adz5A Jul 29 '19 at 12:40
I mean, I need specific values from the JSON file. I'll try to figure it out. Thanks again for your help! – Markde23 Jul 29 '19 at 12:45
Ah, good luck with this. If you have a memory limit issue you might be interested in http://oboejs.com/ wich is a json streaming library. If my answer is OK can you accept it ? – adz5A Jul 29 '19 at 12:48

score 0 · Answer 3 · answered Jul 30 '19 at 08:23

0

The solution was real easy actually:

var myvar = require('./filepath/myfile.json');
var a = myvar[0].age;
var b = myvar[1].age;
var c = myvar[2].age;
var d = myvar[5].age;
var e = myvar[6].age;

answered Jul 30 '19 at 08:23

Markde23

21
2

Get-Json form local file

3 Answers3