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Forum Discussion
Dropbox oAuth2 auth process fails with 400 Bad Request when call /oauth2/token
I have got the problem with my app.
It worked fine for long time and now somethign happend. I can not understand what is wrong here.
The problem is with oauth2 auth process.
The first step works fine. I call https://www.dropbox.com/oauth2/authorize with my client_id, redirect_url (it is registered in the app).
User approves access and dropbox redirects me back to the redirect_url and there is the code argument (access code).
When i call /oauth2/token to exchance this code for the access token , i have the http 400 error.
2020-11-04 08:19:43 > POST /oauth2/token HTTP/1.1 User-Agent: Mozilla/5.0 (Windows NT 5.1) Chrome/23.0.1271.95 Safari/537.11 Host: api.dropboxapi.com Accept: application/x-ms-application, image/gif, application/xaml+xml, *\/* Content-Type: application/x-www-form-urlencoded Accept-Encoding: gzip, deflate Connection: Keep-Alive Mozilla/5.0 (Windows; U; Windows NT 5.1; uk; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5 Content-Length: 223 grant_type=authorization_code&code=Vwb***EU_yE&client_id=7cor***3&client_secret=******&redirect_uri=https%3A%2F%2Fdev7-roman-web1.*****.com%2Fdropbox_oauthcalback.htm * upload completely sent off: 223 out of 223 bytes < HTTP/1.1 400 Bad Request < Content-Length: 11 < Content-Type: text/plain < Date: Wed, 04 Nov 2020 08:19:10 GMT < Server: envoy < Connection: close < * Closing connection 12 Bad Request
WHat can be wrong with it? any idea?
Ok. Other possible reason of my problem is that there was wrong User-Agent string n the request (second line from bottom)
I also have this exact problem.
It seems to have occurred afer this change:
https://dropbox.tech/developers/now-available--scoped-apps-and-enhanced-permissions
but in that blog it says that existing Apps will continue to work.
DropBox this is a ig problem for those of us who have existing apps.I seems found the reason .
My endpoint to do the second step was
https://api.dropboxapi.com/oauth2/token
when i replaced it to
https://www.dropboxapi.com/oauth2/token
all wtarted to work fine.
before it worked. maybe that endpoint support for oauth2 was canceled at some point and i didn't notice
I hve read the docs. https://www.dropbox.com/developers/documentation/http/documentation
It ways the endpoint must be
https://api.dropboxapi.com/oauth2/token
So, now i am confused.
Ok. Other possible reason of my problem is that there was wrong User-Agent string n the request (second line from bottom)
- Greg-DB
Dropbox Staff
This step of the OAuth flow should be accessed on https://api.dropboxapi.com/oauth2/token , not www.
This endpoint is working as expected for me, and it sounds like the original poster here found the issue with the request they were sending.
UKCloud If you're still having trouble with this endpoint though, please share the details of the problem so we can help. Thanks!
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