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
– Eltu, Commented Jul 29, 2019 at 10:06
Read this : stackabuse.com/reading-and-writing-json-files-with-node-js — Sundeep
– Sundeep, Commented Jul 29, 2019 at 10:08
Just FYI, I removed the local-storage tag, because that refers to the localStorage object in browsers. — Reinstate Monica Cellio
– Reinstate Monica Cellio, Commented Jul 29, 2019 at 10:09

Saurabh Yadav · Accepted Answer · 2019-07-29 10:07:21Z

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, 2019 at 10:07

Saurabh Yadav

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adz5A · Accepted Answer · 2019-07-29 10:16:31Z

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, 2019 at 10:16

adz5A

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4 Comments

Markde23 Over a year ago

It's working, now I need to figure out how I can get the specific values from the value. like "allowed_content[6].age"

adz5A Over a year ago

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

Markde23 Over a year ago

I mean, I need specific values from the JSON file. I'll try to figure it out. Thanks again for your help!

adz5A Over a year ago

Ah, good luck with this. If you have a memory limit issue you might be interested in oboejs.com wich is a json streaming library. If my answer is OK can you accept it ?

Markde23 · Accepted Answer · 2019-07-30 08:23:18Z

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, 2019 at 8:23

Markde23

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