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HttpWebResponse.getResponseStream(): Stream sometimes does not deliver received data from HttpRespon

Posted By:      Posted Date: May 22, 2011    Points: 0   Category :WPF


I have a problem with chunked encoding. We want to keep up a http connection between a JBOSS 5.1 server and a .Net Client using chunked encoding by responding periodically with short from the server upon a http client request.


The server delivers a http response with chunked encoding.
The ResponseStream should deliver each received chunk part immediatly, see code below.


With wireshark I can verify the server sends each chunked packet and the .NET client sends an ACK message (on TCP level)


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Closing the download stream (got from HttpWebResponse.GetResponseStream()) takes some time if we clo



I am using HttpWebRequest to download a file from server. When I get the response stream and start reading from it, I need to cancel reading and close this stream in between (this is something like pause download). Please see the code below.



Stream serverStream = resp.GetResponseStream();

Stream localStream = new FileStream(file_path, FileMode.Open, FileAccess.Write);



            HttpWebRequest getrequest;

            getrequest = (HttpWebRequest)HttpWebRequest.Create(download_uri);

            getrequest.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip,deflate");

            getrequest.Timeout = System.Threading.Timeout.Infinite;


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Greetings!! i have a dataset which is constantly serialized & deserialized by multiple threads (in a thread safe manner using lock statement) using System.Runtime.Serialization.Formatters.Binary.BinaryFormatter (.net 2.0). The Code below works pretty fine but in some rare scenarios it gives the above exception while deserializing. public void SerializeData(string path, DataSet currentData) { dataStream = new FileStream(path , FileMode.Create, FileAccess.ReadWrite); try { biFormatter.Serialize(dataStream, currentData); } finally { dataStream.Flush(); dataStream.Close(); } } DataSet DeserializeData(string path) { dataStream = new FileStream(path , FileMode.Open, FileAccess.ReadWrite); DataSet storedDataSet = new DataSet(); storedDataSet.Locale = CultureInfo.InvariantCulture; try { storedDataSet = (DataSet)biFormatter.Deserialize(dataStream); } finally { dataStream.Close(); } return storedDataSet; } When i observed the serialized file i realized the file had some in incomplete/truncated data. The truncated file loo

Incoming data not received?


Establishing the connection with myself finishes succesfully, but when I try to send myself an actual message, the string that is supposed to be converted from a byte array is just blank, thus no data is received or does it go wrong somewhere else?


public partial class Form1 : Form
    Socket workersocket;
    Socket client;
    byte[] buffer;
    IPAddress ip;
    IPEndPoint ipend;
    Socket connectclient;
    bool check;
    string readtext;
    public Form1()

    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
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StreamAccessor and HttpWebResponse stream


Is it possible to return the Stream from HttpWebResponse.GetResponseStream() from a streamaccessor method? I have a streamaccessor that returns blobs stored on an external web server using the following statements.  When I return the stream returned by HttpWebResponse.GetResponseStream(), I get an error stating that it "Failed to retrieve data from the External System: 'Error - No content exists for this field'". 


If I uncomment out the bold portion and return a MemoryStream instead then it works fine.  While returning a MemoryStream is fine for development, it will not work in production.  I would also prefer to not write the file to disk.  I cannot find anything in the logs stating why it thinks there is no content.


public static Stream GetDocument(string DocumentUri, string username, string password)

// code that generates the url removed.

            string url = urls.First().Value;
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The incoming tabular data stream (TDS) protocol stream is incorrect. The MARS TDS header contained e


Below error occured like 100 times today morning , have no clue where to start looking into.

Any ideas?




Exception of type 'System.Web.HttpUnhandledException' was thrown.


The incoming tabular data stream (TDS) protocol stream is incorrect. The MARS TDS header contained errors.


   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)

Duplicated data received thru SerialPort.Read



Can you help me with this strange problem? I'm communicating with RS232 device thru GPRS modem (RS232)

So, I open port, sent AT commands to call modem on other side and then (after establishing communication between modems) i send commands to remote RS232 device.

After sending command i wait collecting device response data in buffer until receive all 19 bytes of device responce. Strange, but if i try to read device responce again - i receive data (that can't be). Response data looks like i've send my request to device second time.

It looks like some strange write buffer caching or something like that. Can you help me to repair this?


        public bool ReadFromPort(out byte[] data, int len)
            if ((port == null) || (!isConnected) || (!port.IsOpen))

Incoming tabular data stream error

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Hi I have an access database linked to a SQL 2008 back end, in the last few weeks I have start to get the following error when the users try to update a particular form.
ODBC--Update on Linked Table Bill Phonenum Add Failed.

[Microsoft][SQL Server Native Client 10.0][Sql Serer]The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect. Parameter 2 (""):data type 0X00 is unknown. (#8009)

I have searched for a fix for this but I can not find one, the error is inconsistent as it does not happen every time and seems to have moved, when it was first reported it was on a numeric field but it was reported yesterday on a bit field.
even more strange is the fact that if you go to the form change one bit field it does not happen, it

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