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Forum Discussion
Error 404 Server remote no found
I have an expired token so to get a new one. I try with this code but i have the error Error 404 Server remote no found. I use https://api.dropbox.com and https://api.dropboxapi.com with the sam...
Lukag wrote:I changed my code but i have an error 400 Bad request
...
Hm..🤔 You didn't mention, but let me guess: the error message states - unsupported grant type or so. Right?
What grant type you're using EXACTLY? 🧐 Focus on "exactly"! Even one letter - more or less - may make the things wrong. 😉
PS: Print out what you're passing as body text and compare what has to be as we discussed in previous threads. Does it match?
DB-Des
Dropbox Engineer
Dropbox EngineerHi @Lukag,
The following lines of code are actually appending the parameters to the URL, hence why you are receiving a 404.
Dim _command As String _command = "https://api.dropboxapi.com/oauth2/token "
_command += " -d grant_type=refresh_token "
_command += "-d refresh_token=" & _refresh_token
_command += "-d client_id=" & _App_key
_command += "-d client_secret=" & _App_secret
Additionally, as a reminder, endpoint /oauth2/token accepts ContentType: application/x-www-form-urlencoded. From your example, it looks like you are using application/json.
We'd recommend re-writing the logic of your app to use the corresponding ContentType and to pass the parameters in the body of the POST request.
I hope you find this information helpful!
I changed my code but i have an error 400 Bad request
(I try with api.dropboxapi.com and with api.dropbox.com , which one is the right one ? )
Dim _command As String
_command = "https://api.dropboxapi.com/oauth2/token "
Dim Request As HttpWebRequest
Request = HttpWebRequest.Create(_command)
Request.Method = "POST"
Request.KeepAlive = True
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 Or SecurityProtocolType.Tls12 Or SecurityProtocolType.Tls11 Or SecurityProtocolType.Tls
Request.ContentType = "application/x-www-form-urlencoded"
Request.UserAgent = "Mozilla/5.0 (Windows NT 6.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.154 Safari/537.36"
ServicePointManager.SecurityProtocol = CType(48, SecurityProtocolType) Or CType(192, SecurityProtocolType) Or CType(768, SecurityProtocolType) Or CType(3072, SecurityProtocolType)
Request.AllowAutoRedirect = True
Dim postbody As String = "&grant_type=refresh_token "
postbody += "&refresh_token=" & _refresh_token
postbody += "&client_id=" & _App_key
postbody += "&client_secret=" & _App_secret
Dim payload = Encoding.UTF8.GetBytes(postbody)
Request.ContentLength = payload.Length
Using dataStream = Request.GetRequestStream()
dataStream.Write(payload, 0, payload.Length)
End Using
Try
Using response = CType(Request.GetResponse(), HttpWebResponse)
Using reader = New IO.StreamReader(response.GetResponseStream())
_file = reader.ReadToEnd()
End Using
End Using
Catch ex As WebException
Using response = CType(ex.Response, HttpWebResponse)
Using reader = New IO.StreamReader(response.GetResponseStream())
_errore = reader.ReadToEnd()
End Using
End Using
Catch ex As Exception
Throw
End Try
Lukag wrote:I changed my code but i have an error 400 Bad request
...
Hm..🤔 You didn't mention, but let me guess: the error message states - unsupported grant type or so. Right?
What grant type you're using EXACTLY? 🧐 Focus on "exactly"! Even one letter - more or less - may make the things wrong. 😉
PS: Print out what you're passing as body text and compare what has to be as we discussed in previous threads. Does it match?
the problem was that i put a space after refresh_token ...you can see "&grant_type=refresh_token "
( i use https://api.dropboxapi.com/oauth2/token and it works )
Thank you very much
- Greg-DB
Dropbox Staff
Thanks for following up. I'm glad to hear you got that working. For reference, both api.dropbox.com and api.dropboxapi.com are acceptable for this.
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