vb.net - request.GetResponse() 给出“操作超时。” 在 vb.net

Question

我在 vb.net 中获取 POST 方法 Web 请求的响应时遇到问题，并且 GET 请求正常工作并获得响应，而相同的请求在 C# 中工作正常，步骤相同。那么，谁能帮我解决这个问题

这里 Url 是一个弹性搜索引擎，postData 变量中的数据是一个 json 字符串，响应也是一个 json 字符串

昏暗请求 As System.Net.HttpWebRequest = System.Net.HttpWebRequest.Create("HOSTIP:9200/es5078_1/_search?pretty=true")

    request.Method = "POST"
    Dim postData As String = CGeneral.gstrMsgNC(236)
    request.ContentType = "application/x-www-form-urlencoded"
    request.ContentLength = postData.Length
    request.Timeout = 100000

    Dim writer As StreamWriter = New StreamWriter(request.GetRequestStream())
    writer.Write(postData)
    request.Expect = ""
    request.AllowAutoRedirect = True
    request.AllowWriteStreamBuffering = True

    Dim response As System.Net.HttpWebResponse = request.GetResponse()

    Dim responseReader As StreamReader = New StreamReader(response.GetResponseStream())
    Dim result As String = responseReader.ReadToEnd()