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[英]SOAP Error: The request was aborted: Could not create SSL/TLS secure channel
[英]ASP.NET "The request was aborted: Could not create SSL/TLS secure channel" occurs also with configured servicepointmanager
我正在嘗試請求此圖像: https : //www.kamerstunt.nl/file/img/web/woning/9577323WenumWieselZwolseweg-142d_6.jpg如果您閱讀本文時該圖像不再存在,則它可能已被刪除,但是您仍然可以查看有問題的 SSL 證書。 使用我的瀏覽器,我能夠成功導航到該頁面,請求圖像並查看有效的 SSL 證書。
我在這里檢查: 請求被中止:無法創建 SSL/TLS 安全通道
所以我將該解決方案添加到我的代碼中:
Dim imgRequest As WebRequest = WebRequest.Create("https://www.kamerstunt.nl/file/img/web/woning/9577323WenumWieselZwolseweg-142d_6.jpg")
Dim imgResponse As WebResponse
ServicePointManager.Expect100Continue = True
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls
'//I also tried: ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls Or SecurityProtocolType.Ssl3
imgResponse = imgRequest.GetResponse()
Dim streamPhoto As Stream = imgResponse.GetResponseStream()
我試過:
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 Or SecurityProtocolType.Tls Or SecurityProtocolType.Tls11 Or SecurityProtocolType.Tls12
但后來我收到錯誤: 'Tls12' is not a member of 'System.Net.SecurityProtocolType'
'Tls11' is not a member of 'System.Net.SecurityProtocolType'
我還嘗試更改注冊表以允許 Windows 不阻止 512 位的 DHE,並在HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\SecurityProviders\\SCHANNEL\\KeyExchangeAlgorithms\\Diffie-Hellman.
下添加了值為 0x00000200(512) 的 ClientMinKeyBitLength HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\SecurityProviders\\SCHANNEL\\KeyExchangeAlgorithms\\Diffie-Hellman.
但它仍然失敗......為什么?
這是我使用的返回Stream
的解決方案......您也可以修改它,使其返回一個字節數組,然后從該字節數組創建一個新的 MemoryStream。 此外,您可以將其更改為 url,而不是傳遞的字符串類型,但這取決於您。
Public Function GetRemoteStream(uRL As String) As MemoryStream
Dim webClient As New WebClient()
Dim imageBytes As Byte() = webClient.DownloadData(uRL)
Dim mem As New MemoryStream(imageBytes)
Return mem
End Function
示例用法
Dim nStream As New MemoryStream
nStream = GetRemoteStream(yoururlhere)
編輯請閱讀********************************************
在研究這個並進一步挖掘之后,我找到了一個解決方案。 該站點似乎已放棄對 SSL 和 Tls11 的支持。
我開始了一個針對4.5 framework的新項目。 然后我使用了這個SecurityProtocolType
...
SecurityProtocolType.Tls12
解決方案
將目標框架更改為: 4.5並使用: SecurityProtocolType.Tls12 。 現在你的協議應該是這樣的......
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12
另一個注意事項
我建議包裝您的Stream
以便正確處理它。 例如:
Using stream As Stream = imgResponse.GetResponseStream()
Using ms As New MemoryStream()
Dim count As Integer = 0
Do
Dim buf As Byte() = New Byte(1023) {}
count = stream.Read(buf, 0, 1024)
ms.Write(buf, 0, count)
Loop While stream.CanRead AndAlso count > 0
'ms is your memory stream... as I take it you want the photo :)
End Using
End Using
這是我輸出的證明......
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