Getting 400 HTTP error for /list_folder/longpoll

to clarify - I'm using app-specific permissions

If you're getting this error from files/list_folder/longpoll when calling with an unmodified cursor returned from files/list_folder, that error would be unexpected and may be due to a bug on our side. To help us look into this:

- Are you modifying the cursor in any way?

- Is this reproducible using newly acquired cursors from files/list_folder?

- Can you share a sample request and response?

Thanks in advance! 

Hi Gregory, thanks for your reply

You're correct, I'm passing an unmodified cursor from files/list_folder to files/list_folder/longpoll. The problem is reproducible in API Explorer as well. Here's an example:

Request to list_folder:

curl -X POST https://api.dropboxapi.com/2/files/list_folder \ --header 'Authorization: Bearer -----access_token----' \ --header 'Content-Type: application/json' \ --data '{"path":"}'

Response:

{ "entries": [ { ".tag": "file", "name": "firmware.bin", "path_lower": "/firmware.bin", "id": "id:nyCg-bFo0NAAAAAAAAAAAg", "client_modified": "2016-01-17T07:02:55Z", "server_modified": "2016-01-17T07:02:55Z", "rev": "143532a63", "size": 0 } ], "cursor": "1AAGLifVjyh-QzyQXWvWXfiDd1I6IWtxN0-mGryosrvCTqmwW6GMaF1F76R-vzk1UcTDJe6Pb4taPG6HPh0s8EUizyPkhXyb3pUZIUVAaua2aArHzt2mH4bsyrR_e3CGID0I", "has_more": false }

Request to /list_folder/longpoll:

curl -X POST https://notify.dropboxapi.com/2/files/list_folder/longpoll \ --header 'Content-Type: application/json' \ --data '{"cursor":"1AAGLifVjyh-QzyQXWvWXfiDd1I6IWtxN0-mGryosrvCTqmwW6GMaF1F76R-vzk1UcTDJe6Pb4taPG6HPh0s8EUizyPkhXyb3pUZIUVAaua2aArHzt2mH4bsyrR_e3CGID0I"}'

Response:

Error: 400

Error in call to API function "files/list_folder/longpoll": request body: cursor: unsupported cursor type

As you can see, the cursor wasn't modified between calls, but we're still getting an error in response.

Regards, Nik

Thanks for the additional information Nik! We're looking into it.

Thx Gregory, greatly appreciated!

Long polling stopped working for me, too.

This should be resolved now. Please let us know if you're still seeing any issues.

Updated SwiftyDropbox to version 3.0.0 and I am getting the same error.

It seems that if you set includeMediaInfo to true, you will get this error.

Thanks for the report Kestas! We're looking into it.

Hi Kestas, unfortunately /list_folder/longpoll doesn't currently support cursors for include_media_info=true, but I've opened this as a feature request. We'll update the documentation to clarify this.