Error: Parsing error: Unexpected token O in JSON at position 0 on PUT request

[eminx]

Jo!

My PUT request works in the server - I get a 200 and positive results. But the http client I create has complains over my request and it actually throws an error.

Error: Parsing error : Unexpected token O in JSON at position 0

It seems to be an issue that originates from auto stringifying of JSON, but I can not find how to resolve...

My request looks like this:

        const dataObj = {name: 'my-new-name'}
        client.put('my-url', dataObj, (err, res, body) => {
  		if (err) {
  			this.snack.isOpen = true;
  			this.snack.message = "The operation couldn't be handled";
  			console.log('error!', err);
  		} else {
  			this.snack.isOpen = true;
  			this.snack.message = 'The virtualization is successfully updated';
  			console.log(res.statusCode);
  		}
	});

So what shall I do to make it work well?

Thanks!

[AnasAboreeda]

Can you try

        const dataObj = {name: 'my-new-name'}
        client.put('my-url', JSON.stringify(dataObj), (err, res, body) => {
  		if (err) {
  			this.snack.isOpen = true;
  			this.snack.message = "The operation couldn't be handled";
  			console.log('error!', err);
  		} else {
  			this.snack.isOpen = true;
  			this.snack.message = 'The virtualization is successfully updated';
  			console.log(res.statusCode);
  		}
	});

[carlthome]

Have you tried it on Windows 95?

[eminx]

@anasfullstack
I keep getting the same error from the client. Also the server throws this:
PUT http://localhost:8090/some-endpoint 400 (Bad Request)

@carlthome 💘

[AnasAboreeda]

Now I can see the issue, The server is not responding in a JSON, it's just returning a plain text, maybe you should use another request library like request instead of this one.

[eminx]

The problem was due to server not sending JSON as response. Fixing it in the server made the problem disappear!
Is there, though, still a solution that can be done at the client side using request-json?

[frankrousseau]

You can set the parse flag to false to deal with non JSON body.

client.put('my-url', dataObj, (err, res, body) => {
    if (err) {
  	this.snack.isOpen = true;
  	this.snack.message = "The operation couldn't be handled";
  	console.log('error!', err);
    } else {
  	this.snack.isOpen = true;
  	this.snack.message = 'The virtualization is successfully updated';
  	console.log(res.statusCode);
  }
}, false);

[adrian-taralunga]

now you have to specify the response type in the options param http.put('url', body, {responseType: 'text'});