Parsing Error - Unexpected token formdata

Grafana k6 OSS Support
1

Hi,

Can anyone please with K6 IO - Getting parsing error for a property used which has special characters as below? How can we solve that please? causing issue

  form_key: val,
  login[username]: 'test153@mailinator.com',
  login[password]: 'Testing123',

image

Cannot save this property as a variable as during the POST request, it does not work.

Thanks
Youven

2

Hi,

I’m not exactly sure what you’re trying to do, but if you want to define object keys dynamically, you need to surround them with square brackets. For example:

let formdata = {
    form_key: val,
    [login[username]]: 'test153@mailinator.com',
    [login[password]]: 'Testing123',
    send: '',
};

This assumes there’s a login object with a 'login[password]' key, which seems strange to me, but hope this helps. :slight_smile:

1 Like
3

Hi @Youven,

In the absence of additional details, I’ll have a go at this question from two different angles.

  1. If you are indeed trying to set the key to the string login[username] which I for sure would discourage, if you have any say at all into how this is implemented, you could do:
let formData = {
  key: 'test',
  'login[user]': 'hello'
};

// -> {key: "test", login[user]: "hello"}
  1. If you, however, are looking to add a login object to your form data that contains the properties username and password, this would be the idiomatic approach:
let formdata = {
    form_key: val,
    login: {
      username: 'test153@mailinator.com',
      password]: 'Testing123',
    },
    send: '',
};

as you otherwise, which @imiric also stated in his reply, would get this behavior instead:

let user = 'johnny'
let login = {
 johnny: 'helloKey'
};

let formData = {
  key: 'test',
  [login[user]]: 'hello'
}; // -> {key: "test", helloKey: "hello"}

Thanks,
Simme

1 Like
4

Hi Imiric/Simme,

Thanks both for feedback.

I managed to solve the issue - Using solution 1 above works fine.

Thanks again both for help
Youven

1 Like