vb.net - SOAP 错误 : The request was aborted: Could not create SSL/TLS secure channel

Question

我已经使用 WSDL 文件创建了 Soap 服务。在 SOAP UI(带有传递 header 和客户端 ID、 secret 的 XML 部分)上进行测试时，它给出了正确的响应。但是通过服务报错

The request was aborted: Could not create SSL/TLS secure channel

有人可以分析代码吗我的服务看起来像:

    Dim Request As WebRequest
    Dim Response As WebResponse
    Dim DataStream As Stream
    Dim Reader As StreamReader
    Dim SoapByte() As Byte
    Dim pSuccess As Boolean = True
    Dim SD2Request As String

    SoapByte = System.Text.Encoding.UTF8.GetBytes(MyXMLString)

        Dim myCred As System.Net.CredentialCache = New System.Net.CredentialCache()
        Dim netCred As NetworkCredential = New NetworkCredential("testclient", "test@123")
        myCred.Add(New Uri("https://URL"), "Basic", netCred)
        Request = WebRequest.Create("https://URL")
        Request.Headers.Add("Client-ID", "ID-1234")
        Request.Headers.Add("Client-Secret", "Secret-1234")
        Request.PreAuthenticate = True
        Request.ContentType = "application/xml; charset=utf-8"
        Request.ContentLength = SoapByte.Length
        Request.Method = "POST"
        Request.Credentials = myCred
        DataStream = Request.GetRequestStream()
        DataStream.Write(SoapByte, 0, SoapByte.Length)
        DataStream.Close()
        Response = Request.GetResponse()
        DataStream = Response.GetResponseStream()
        Reader = New StreamReader(DataStream)
        SD2Request = Reader.ReadToEnd()
        DataStream.Close()
        Reader.Close()
        Response.Close()
        Return SD2Request

我已导入 WSDL 文件作为服务引用。

Answer 1

.NET 4.5 默认没有启用 TLS。您必须通过设置 System.Net.ServicePointManager.SecurityProtocol property 来手动启用它:

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls Or SecurityProtocolType.Tls11 Or SecurityProtocolType.Tls12