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我正在尝试使用 HttpWebRequest 对象将 ASP.Net 应用程序的 web url 连接到 java web 应用程序并获得状态 200 OK。但是当我尝试使用 GetResponseStream() 读取响应内容时，我收到错误“responseStream.Length”抛出了“System.NotSupportedException”类型的异常

这是代码

string uri="https://myapp.com/mainservlet/";

System.Net.HttpWebRequest hwrequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(uri);
            hwrequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
            hwrequest.AllowAutoRedirect = true;
            hwrequest.UserAgent = "http_requester/0.1";
            hwrequest.Timeout = 60000;
            hwrequest.Method = "POST";
            if (hwrequest.Method == "POST")
            {
                hwrequest.ContentType = "text/xml";
                // Use UTF8Encoding instead of ASCIIEncoding for XML requests:
                System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
                byte[] postByteArray = encoding.GetBytes(postData);
                hwrequest.ContentLength = postByteArray.Length;
                 System.IO.Stream  poststream = hwrequest.GetRequestStream();
                poststream.Write(postByteArray, 0, postByteArray.Length);
                poststream.Close();
            }

            //Get the Response now.
            hwresponse = (System.Net.HttpWebResponse)hwrequest.GetResponse();

         //  System.Xml.Linq.XDocument doc;
            //hwresponse.Method = "GET";
            string str = hwresponse.CharacterSet;
            string str1 = hwresponse.ContentEncoding;
            if (hwresponse.StatusCode == System.Net.HttpStatusCode.OK)
            {

                System.IO.Stream responseStream = hwresponse.GetResponseStream();
               // Here i am getting that exception

注意：当我尝试在浏览器中粘贴相同的网址时，它会说

错误 404--未从 RFC 2068 超文本传输​​协议中找到--HTTP/1.1: 10.4.5 404 Not Found 服务器未找到与请求 URI 匹配的任何内容。没有说明这种情况是暂时的还是永久性的。如果服务器不希望向客户端提供此信息，则可以使用状态代码 403（禁止）来代替。如果服务器通过一些内部可配置的机制知道旧资源永久不可用并且没有转发地址，则应该使用 410 (Gone) 状态代码。

它也进入 200 OK 状态并显示异常。有人可以帮我解决/建议吗？

4

2 回答 2

1

使用它来获得响应已经使用了 4 年，现在总是有效。

 HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            if (response.StatusCode == HttpStatusCode.OK)
            {
                Stream responseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(responseStream);
                responseData = myStreamReader.ReadToEnd();
            }
            response.Close();
于 2012-12-22T21:45:23.330 回答
0

你为什么要检查它是否是一个帖子？

尝试像这样读取流。然后您还可以设置您实际需要多少网页数据。

Dim ResponseStream As Stream = Response.GetResponseStream()
            Try
                Dim reader As New StreamReader(Stream.Null)
                Try
                    reader = New StreamReader(ResponseStream, System.Text.Encoding.GetEncoding(CharSet), True, 256)
                Catch ex As Exception

                    '
                    ' Redo the stream
                    '
                    If InStr(ex.Message, "not a supported encoding name.") > 0 Then
                        Try
                            reader = New StreamReader(ResponseStream, System.Text.Encoding.GetEncoding("utf-8"), True, 256)
                        Catch ex1 As Exception

                        End Try
                    End If
                End Try
                '
                'Dim string to build index.
                '
                Dim IndexBuildString As New StringBuilder()
                Try
                    Dim read(256) As [Char]
                    '
                    ' Reads 256 characters at a time.    
                    '
                    Dim ByteCount As Integer = reader.Read(read, 0, 256)
                    '
                    ' Read in while, exit it if exceeds ~ 390 kb
                    '
                    While ByteCount > 0
                        '
                        'Check if limit of kilobytes are over the limit.
                        '
                        If System.Text.ASCIIEncoding.Unicode.GetByteCount(IndexBuildString.ToString()) > 153600 Then
                            Exit While
                        End If
                        '
                        'Dumps the 256 characters to a string and displays the string to the console.
                        '
                        Dim str As New [String](read, 0, ByteCount)
                        ByteCount = reader.Read(read, 0, 256)
                        '
                        'Append to the StringBuilder
                        '
                        IndexBuildString.Append(str)
                    End While
                    '
                    'Assign the Stringbuilder and then clear it
                    ' 
                    IndexString = CleanIndexString(IndexBuildString.ToString())
                Catch ex As Exception

                Finally

                    Try
                        IndexBuildString.Clear()
                        reader.Close()
                        reader.Dispose()
                    Catch ex As Exception

                    End Try
                End Try
            Catch ex As Exception

            Finally
                ResponseStream.Dispose()
            End Try

您必须添加自己的错误处理......

于 2012-12-21T12:39:24.630 回答