httpsrequest Google驅動器refreshtoken

Question

我正在嘗試創建一個http請求，以使用存儲的refreshtoken獲取一個新的accesstoken，以便可以訪問Google雲端硬盤。

   Dim uri As String = "https://accounts.google.com/o/oauth2/token"

   Dim para As String = "code='" + cred.RefreshToken + "'&client_id='" + ClientCredentials.CLIENT_ID + "'&client_secret='" + ClientCredentials.CLIENT_SECRET + "'&grant_type='refresh_token'"

   Dim httpWebRequest As System.Net.HttpWebRequest = Net.WebRequest.Create(uri)
   httpWebRequest.Method = "POST"
   httpWebRequest.ContentType = "application/x-www-form-urlencoded"

   Dim requestStream As System.IO.Stream = httpWebRequest.GetRequestStream()
   Dim streamwriter As System.IO.StreamWriter = New System.IO.StreamWriter(requestStream)
   streamwriter.Write(para)
   streamwriter.Close()

   Dim httpWebResponse As System.Net.HttpWebResponse = httpWebRequest.GetResponse()

但這返回了一個錯誤的請求。 我錯過了什么？

Answer 1

您沒有將憑據寫入StreamWriter，它應顯示為...

streamwriter.Write(para)

那當然是假設它們是正確的。