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jenseno's avatar
jenseno
Explorer | Level 4
9 years ago

"No auth function available for given request" return on /token request

Hi. I send the following form data with the code I got from the authorization page. I use redirect_uri back to my app through localhost.

 

However I get the following response (error code 400): "No auth function available for given request".

My request form data looks like this:

 

Header:

POST /oauth2/token HTTP/1.1
Host: api.dropboxapi.com
User-Agent: UnityPlayer/5.5.2f1 (UnityWebRequest/1.0, libcurl/7.46.0-DEV)
Accept: */*
Accept-Encoding: identity
X-Unity-Version: 5.5.2f1
Content-Length: 177

 

Post data:

code=KNJIALLS_WCAAAAAAABSTZP97AYWIZJPX9B1A6CBFUC&grant_type=authorization_code&client_id=<removed for security>&client_secret=<removed for security>&redirect_uri=http%3A%2F%2F127.0.0.1%3A6756

 

I could not find anything on google or the forums, so now I'm trying here.

I can see that auth authorization is missing (Authorization bearer) but the docs said nothing about this, and I don't have a token at this stage in the process anyway.

 

Thanks in advance

 

Odin Jensen

 

 

 

API

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  • Greg-DB's avatar
    Greg-DB
    Icon for Dropbox Community Moderator rankDropbox Community Moderator
    9 years ago

    bruce0205 If that doesn't seem to be the issue in your case, please supply the code to reproduce the issue for your case.

  • Laurent22's avatar
    Laurent22
    Explorer | Level 4
    8 years ago

    In my case I had this issue because I was using the wrong content type to post the data.

    This endpoint is actually very confusing because unlike all the other endpoints (which accept application/json) it accepts application/x-www-form-urlencoded, and if you use the wrong format it will respond with this absurd error message "No auth function" even though there can't be an auth token at that point.

     

    In my tests other mistakes in the data format (like missing client ID or secret) also resulted in this error .

     

    From the doc it's unclear whether client ID and secret are required or not (I have no idea what "If credentials are passed in POST parameters" means in this context) but they seem to be required anyway.

     

    So in my case I eventually got it working using this kind of request:

     

    curl -v -F 'client_id=REMOVED' -F 'client_secret=REMOVED' -F 'code=REMOVED' -F 'grant_type=authorization_code' https://api.dropboxapi.com/oauth2/token

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