HttpwebRequest和响应花费时间 [英] HttpwebRequest and response taking time

问题描述

下面的代码需要150到200秒的时间才能读取数据(实际上，我的响应数据非常大)
请提供任何替代方法来解决此问题.

below code is taking 150 to 200 second to read data (actualy my response data is very large)
Please give any alternate to resolve this problem.

Protected Function PostXml(ByVal url As String, ByVal xml As String) As String
        Dim bytes As Byte() = Encoding.UTF8.GetBytes(xml)
        Dim strResult As String = String.Empty
        Dim request As HttpWebRequest = DirectCast(WebRequest.Create(url), HttpWebRequest)
        request.Method = "POST"
        request.ContentLength = bytes.Length
        request.ContentType = "text/xml" '; charset=utf-8
        request.Timeout = 3600 * 1000
        request.ReadWriteTimeout = 3600 * 1000
        Try
            Using requestStream As Stream = request.GetRequestStream()
                requestStream.Write(bytes, 0, bytes.Length)
            End Using
            Using response As HttpWebResponse = DirectCast(request.GetResponse(), HttpWebResponse)
                If response.StatusCode <> HttpStatusCode.OK Then
                    Dim message As String = [String].Format("POST failed. Received HTTP {0}", response.StatusCode)
                    Throw New ApplicationException(message)
                Else
                    Dim reader As StreamReader = Nothing
                    Dim responseStream As Stream = response.GetResponseStream()
                    reader = New StreamReader(responseStream, Encoding.Default)
                    strResult = reader.ReadToEnd()  'Here is taking to much time
                    response.Close()
                    responseStream.Close()
                    reader.Close()
                End If
            End Using
        Catch ex As WebException
            strResult = ""
            HtlLog.InsertLogDetails(ex)
        End Try
        Return strResult
    End Function

推荐答案

您可能会超出一端或另一端的Internet连接的上载/下载速度限制. 200秒不到4分钟，具体取决于您的数据大小和Internet连接质量，这可能不是不合理的时间.如果是这种情况，那么您需要查看您的实际数据，看看是否可以找到一些自然的断点，从而允许您以更多的请求将其分小块下载.总传输时间可能会增加，但是由于数据开始显示更快，因此可以感知的时间会减少.

You may well be up against the upload / download speed limit of your internet connection at one end or the other. 200 seconds is under 4 minutes, and depending on your data size and internet connection quality, it may not be an unreasonable amount of time. If this is the case, then you need to look at your actual data, and see if you can find some natural break points allowing you to down load it in smaller pieces, with more requests. The total transfer time may go up, but the perceived time will reduce because the data starts to appear quicker.

通过gzip我解决了我的问题

Through gzip I resolve my problem

这篇关于HttpwebRequest和响应花费时间的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！