Android Question Curl Command using httpjob

Brad Henderson

Member
Licensed User
Can anyone help me execute this curl command using httpjob.

The Dropbox API documentation refers to this curl command:

curl https://api.dropbox.com/oauth2/token \
-d grant_type=refresh_token \
-d refresh_token=<REFRESH_TOKEN> \
-d client_id=<APP_KEY> \
-d client_secret=<APP_SECRET>

I have found a few httpjob examples in the forum, but my difficulty is how to supply the necessary parameters in the correct order. I have tried this:

B4X:
Dim data As Map
    data.Initialize
    data.Put("grant_type", "refresh_token")
    data.Put("refresh_token", "<REFRESH TOKEN>")
    data.Put("client_id", "<APP_KEY>")
    data.Put("client_secret", "<APP_SECRET>")
    
    Dim j As HttpJob
    j.Initialize("", Me)
    j.PostString("https://api.dropbox.com/oauth2/token",data.As(JSON).ToString)
    j.GetRequest.SetContentType("application/json")
    Wait For (j) JobDone(j As HttpJob)
    If j.Success Then
        Log(j.GetString)
    Else
        Log(j.ErrorMessage)
    End If
    
    
    j.Release

This keeps resulting in this error:
{"error": "invalid_request", "error_description": "The request parameters do not match any of the supported authorization flows. Please refer to the API documentation for the correct parameters."}

I have tried the above code by including the "-d" before the first element of the data Map. Same result.

Your help is always appreciated.
 

Erel

B4X founder
Staff member
Licensed User
Longtime User
1. Google search to find curl arguments: https://curl.se/docs/manpage.html#-d

2. Something like:
B4X:
    Dim j As HttpJob
    j.Initialize("", Me)
    Dim sb As StringBuilder
    sb.Initialize
    For Each Key As String In data.Keys
      Dim value As String = data.Get(Key)
       if sb.Length > 0 Then sb.Append("&")
      sb.Append(key).Append("=").Append(value)
    Next
    j.PostString("https://api.dropbox.com/oauth2/token", sb.ToString)
    j.GetRequest.SetContentType("application/x-www-form-urlencoded")
 
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