All Questions
11,772
questions
1035
votes
31
answers
1.1m
views
How to parse JSON using Node.js? [closed]
How should I parse JSON using Node.js? Is there some module which will validate and parse JSON securely?
- 67.9k
888
votes
32
answers
935k
views
How can I print a circular structure in a JSON-like format?
I have a big object I want to convert to JSON and send. However it has circular structure, so if I try to use JSON.stringify() I'll get:
TypeError: Converting circular structure to JSON
or
...
- 54.1k
852
votes
14
answers
774k
views
Using Node.JS, how do I read a JSON file into (server) memory?
Background
I am doing some experimentation with Node.js and would like to read a JSON object, either from a text file or a .js file (which is better??) into memory so that I can access that object ...
- 23.9k
605
votes
11
answers
1.1m
views
Proper way to return JSON using node or Express
So, one can attempt to fetch the following JSON object:
$ curl -i -X GET http://echo.jsontest.com/key/value/anotherKey/anotherValue
HTTP/1.1 200 OK
Access-Control-Allow-Origin: *
Content-Type: ...
- 13.4k
591
votes
15
answers
221k
views
Is it not possible to stringify an Error using JSON.stringify?
Reproducing the problem
I'm running into an issue when trying to pass error messages around using web sockets. I can replicate the issue I am facing using JSON.stringify to cater to a wider audience:
...
- 19.5k
588
votes
8
answers
445k
views
How can I pretty-print JSON using node.js?
This seems like a solved problem but I am unable to find a solution for it.
Basically, I read a JSON file, change a key, and write back the new JSON to the same file. All works, but I loose the JSON ...
- 33.6k
452
votes
13
answers
359k
views
Is there a way to automatically build the package.json file for Node.js projects
Is package.json supposed to be manually edited? Couldn't a program like npm just look through the files, see the "require" statements, and then use that to put the necessary entries in the package....
- 54.7k
425
votes
8
answers
679k
views
How do I consume the JSON POST data in an Express application
I'm sending the following JSON string to my server.
(
{
id = 1;
name = foo;
},
{
id = 2;
name = bar;
}
)
On the server I have this.
app.post('...
- 54.7k
360
votes
11
answers
414k
views
is there a require for json in node.js
I would like to include a couple of JSON files in my JavaScript code that are in the same directory as my JavaScript source file.
If I wanted to include another JavaScript file I could simply use ...
- 5,246
353
votes
40
answers
1.7m
views
"SyntaxError: Unexpected token < in JSON at position 0"
In a React app component which handles Facebook-like content feeds, I am running into an error:
Feed.js:94 undefined "parsererror" "SyntaxError: Unexpected token < in JSON at position 0
I ran ...
- 5,216
332
votes
9
answers
807k
views
Write / add data in JSON file using Node.js
I am trying to write JSON file using node from loop data, e.g.:
let jsonFile = require('jsonfile');
for (i = 0; i < 11; i++) {
jsonFile.writeFile('loop.json', "id :" + i + " square :" + i * i)...
- 3,385
298
votes
11
answers
357k
views
How do I add environment variables to launch.json in VSCode
Working with the new VSCode editor on a node.js project. I am attempting to configure my "Launch" profile for debugging by editing the launch.json file. I need to setup a connectionstring as an ...
- 3,017
225
votes
17
answers
280k
views
node.js TypeError: path must be absolute or specify root to res.sendFile [failed to parse JSON]
[add]
So my next problem is that when i try adding a new dependence (npm install --save socket.io). The JSON file is also valid. I get this error:
Failed to parse json
npm ERR! Unexpected string
npm ...
201
votes
9
answers
184k
views
How do you log content of a JSON object in Node.js?
Is it possible to print an objects contents e.g. methods and attributes in Node.js?
At the moment I'm trying to print the session object and get the following:
console.log("Session:" + session);
>...
- 15.8k
186
votes
3
answers
282k
views
Convert a JSON Object to Buffer and Buffer to JSON Object back
I have a JSON object and I'm converting it to a Buffer and doing some process here. Later I want to convert the same buffer data to convert to valid JSON object.
I'm working on Node V6.9.1
Below is ...
- 1,863
163
votes
2
answers
233k
views
In Node.js, how do I turn a string to a json? [duplicate]
For example, a HTTP REST API just returned me a JSON, but of course it's a string right now. How can I turn it into a JSON?
- 266k
148
votes
5
answers
187k
views
Writing JSON object to a JSON file with fs.writeFileSync
I am trying to write a JSON object to a JSON file. The code executes without errors, but instead of the content of the object been written, all that gets written into the JSON file is:
[object Object]...
- 1,847
148
votes
13
answers
174k
views
Parse large JSON file in Nodejs
I have a file which stores many JavaScript objects in JSON form and I need to read the file, create each of the objects, and do something with them (insert them into a db in my case). The JavaScript ...
- 9,089
131
votes
14
answers
141k
views
Return certain fields with .populate() from Mongoose
I'm getting returned a JSON value from MongoDB after I run my query. The problem is I do not want to return all the JSON associated with my return, I tried searching the docs and didn't find a proper ...
- 2,388
130
votes
4
answers
70k
views
Is Maven similar to npm?
As I have worked with npm which looks for dependencies in package.json file and download it for you. Similarly, I see a pom.xml file in Java project. Does maven looks in this file and download ...
- 1,914
128
votes
8
answers
237k
views
How to update a value in a json file and save it through node.js
How do I update a value in a json file and save it through node.js?
I have the file content:
var file_content = fs.readFileSync(filename);
var content = JSON.parse(file_content);
var val1 = content....
- 1,539
111
votes
5
answers
128k
views
Node js Error: Protocol "https:" not supported. Expected "http:"
I am using IBM Bluemix to make a web service for a school project.
My project needs to request a JSON from an API, so I can use the data it provides. I use the http get method for a data set, and I ...
- 1,281
101
votes
9
answers
270k
views
pass JSON to HTTP POST Request
I'm trying to make a HTTP POST request to the google QPX Express API [1] using nodejs and request [2].
My code looks as follows:
// create http request client to consume the QPX API
var ...
- 7,662
100
votes
18
answers
372k
views
TypeError: Converting circular structure to JSON in nodejs
I am using request package for node.js
Code :
var formData = ({first_name:firstname,last_name:lastname,user_name:username, email:email,password:password});
request.post({url:'http://localhost:8081/...
- 3,017
98
votes
10
answers
170k
views
Convert Mongoose docs to json
I returned mongoose docs as json in this way:
UserModel.find({}, function (err, users) {
return res.end(JSON.stringify(users));
}
However, user.__proto__ was also returned. How can I return ...
- 8,980
94
votes
6
answers
194k
views
Calling a JSON API with Node.js
I am trying to get the facebook profile picture of the user logged into my application. Facebook's API states that http://graph.facebook.com/517267866/?fields=picture returns the correct URL as a JSON ...
- 6,308
94
votes
21
answers
201k
views
How to convert CSV to JSON in Node.js
I am trying to convert csv file to json. I am using .
Example CSV:
a,b,c,d
1,2,3,4
5,6,7,8
...
Desired JSON:
{"a": 1,"b": 2,"c": 3,"d": 4},
{"a": 5,"b": 6,"c": 7,"d": 8},
...
I tried node-csv ...
- 3,809
93
votes
18
answers
179k
views
Combine or merge JSON on node.js without jQuery
I have multiple JSON like those
var object1 = {name: "John"};
var object2 = {location: "San Jose"};
They are not nesting or anything like that. Just basically different fields. I need to combine ...
- 19.6k
93
votes
14
answers
67k
views
Listen to All Emitted Events in Node.js
In Node.js is there any way to listen to all events emitted by an EventEmitter object?
e.g., can you do something like...
event_emitter.on('',function(event[, arg1][, arg2]...) {}
The idea is that ...
- 38.4k
89
votes
1
answer
54k
views
In node package.json, invoke script from another script with extra parameter, in this case add mocha watcher
in node's package.json I would like to reuse a command that I already have in a 'script'.
Here is the practical example
instead of (note the extra -w on the watch script):
"scripts": {
...
- 4,239
86
votes
4
answers
88k
views
Write formatted JSON in Node.js
I'm using Node.js to POST JSON to PostBin but the data is being wrongly formated (as you can see here: http://www.postbin.org/1cpndqw).
This is the code I'm using for tesT:
var http = require('http')...
- 23.7k
83
votes
3
answers
118k
views
How to return a complex JSON response with Node.js?
Using nodejs and express, I'd like to return one or multiple objects (array) using JSON. In the code below I output one JSON object at a time. It works but this isn't exactly what I want. The response ...
- 40k
77
votes
7
answers
61k
views
Edit package.json from command line
I'm trying to add or edit a variable in my package.json from a shell script. So if i have a package.json like this:
{
"name": "my-project",
"description": "Project by @DerZyklop",
"version": "...
- 3,763
74
votes
6
answers
199k
views
Base64 encode a javascript object
I have large Javascript objects which I would like to encode to base-64 for AWS Kinesis`
It turns out that:
let objStr = new Buffer(JSON.stringify(obj), 'ascii');
new Buffer(objStr, 'base64')....
- 5,498
74
votes
3
answers
235k
views
Get a JSON via HTTP request in NodeJS
Here is my model with a JSON response:
exports.getUser = function(req, res, callback) {
User.find(req.body, function (err, data) {
if (err) {
res.json(err.errors);
} ...
- 1,016
69
votes
6
answers
141k
views
How to reliably hash JavaScript objects?
Is there a reliable way to JSON.stringify a JavaScript object that guarantees that the ceated JSON string is the same across all browsers, Node.js and so on, given that the JavaScript object is the ...
- 25.1k
68
votes
4
answers
56k
views
JSON.stringify throws RangeError: Invalid string length for huge objects
As the title implies I'm trying to stringify huge JavaScript Object with JSON.stringify in my Node.js app. The objects are - again - huge (tens of mega bytes), they don't contain any functions. I need ...
- 11.2k
67
votes
6
answers
80k
views
Typescript compiler error when importing json file
So the code is simple:
calls.json
{"SERVER":{
"requests":{
"one":"1"
}
} }
file.ts
import json = require('../static/calls.json');
console.log(json.SERVER);
the generated javascript ...
- 2,998
66
votes
24
answers
223k
views
Node events.js:167 throw er; // Unhandled 'error' event
I'm trying to use JSON Server in a React App. However, I keep getting the following error.
events.js:167
throw er; // Unhandled 'error' event
^
Emitted 'error' event at:
at GetAddrInfoReqWrap....
- 813
64
votes
8
answers
166k
views
Parse XLSX with Node and create json
Ok so I found this really well documented node_module called js-xlsx
Question: How can I parse an xlsx to output json?
Here is what the excel sheet looks like:
In the end the json should look like ...
- 18.5k
64
votes
10
answers
135k
views
npm notice created a lockfile as package-lock.json. You should commit this file
I have been trying to load the skeleton of express with npm install express. It outputs the following line:
npm notice created a lockfile as package-lock.json. You should commit this file.
What ...
63
votes
6
answers
37k
views
Node.js -Firebase Service Account Private Key won't parse
I use .env variables in my app.js file to access the keys. Everything was working fine until I downloaded a new Firebase Service Account Private Key. When I replaced the old value with the new value I ...
- 18.6k
63
votes
1
answer
104k
views
NodeJS HttpGet to a URL with JSON response
I'm trying to make a server-side API call using a RESTful protocol with a JSON response. I've read up on both the API documentation and this SO post.
The API that I'm trying to pull from tracks busses ...
- 663
62
votes
9
answers
215k
views
Looping through JSON with node.js
I have a JSON file which I need to iterate over, as shown below...
{
"device_id": "8020",
"data": [{
"Timestamp": "04-29-11 05:22:39 pm",
"Start_Value": 0.02,
"...
- 9,548
61
votes
6
answers
158k
views
How can I check if a JSON is empty in NodeJS?
I have a function that checks to see whether or not a request has any queries, and does different actions based off that. Currently, I have if(query) do this else something else. However, it seems ...
- 15.9k
60
votes
1
answer
30k
views
Append a new object to a JSON Array in DynamoDB using NodeJS
I am using a JSON structure to store details of a person. Basically name, phone, registeredTimestamp etc., will be other attributes, and Primary key will be the email address.
markedLocations, ...
- 12.5k
52
votes
17
answers
106k
views
"Couldn't read dependencies" error with npm
I wanted to start a Node app and created a package.json file with a tutorial. Here is the json file:
{
"name": "Dashboard",
"version": "0.0.0",
"description": "Client-A Dashboard",
"...
- 6,538
51
votes
8
answers
102k
views
How to force parse request body as plain text instead of json in Express?
I am using nodejs + Express (v3) like this:
app.use(express.bodyParser());
app.route('/some/route', function(req, res) {
var text = req.body; // I expect text to be a string but it is a JSON
});
I ...
- 33.2k
48
votes
5
answers
80k
views
Handling bad JSON.parse() in node safely
Using node/express -
I want to get some JSON out of request headers, but I want to do it safely.
If for some reason it's not valid JSON, it's fine, it can just return false or whatever and it will ...
- 6,141
46
votes
12
answers
64k
views
FormData append nested object
Is it possible to append nested object to FormData?
let formData = new FormData();
let data = {
title: 'title',
text: 'text',
preview: {p_title:'p title', p_text: 'p text'}
};
$.each(...
- 6,596