OPTIONS https://api.dropboxapi.com/2/files/list_folder 400 (Bad Request)

[JasN]

I am using typescript to get a list of folder contents from Dropbox account, I keep getting a 400 Bad Request.

I have created a plunker where you can see my code https://plnkr.co/edit/8f0qZm02qkxYhxig31PT?p=preview

If you look in the browser developer tools you will see the error. What am I doing wrong?

Thanks in advance

[Greg-DB · Accepted solution]

Looking at the response body for the 400, the error is:

CORS preflight failed.  The following HTTP headers are not allowed: "bearer".

"Bearer" isn't the header though. The header should be "Authorization", with "Bearer" as part of the value. That is, instead of this line:

let headers = new Headers({ 'Bearer': 'my_oauth2_token' });

it should be:

let headers = new Headers({ 'Authorization': 'Bearer my_oauth2_token' });