How can I read an Http response stream twice in C#?

c#, stream

Solution

Copy it into a new MemoryStream first. Then you can re-read the MemoryStream as many times as you like:

Stream responseStream = CopyAndClose(resp.GetResponseStream());
// Do something with the stream
responseStream.Position = 0;
// Do something with the stream again


private static Stream CopyAndClose(Stream inputStream)
{
    const int readSize = 256;
    byte[] buffer = new byte[readSize];
    MemoryStream ms = new MemoryStream();

    int count = inputStream.Read(buffer, 0, readSize);
    while (count > 0)
    {
        ms.Write(buffer, 0, count);
        count = inputStream.Read(buffer, 0, readSize);
    }
    ms.Position = 0;
    inputStream.Close();
    return ms;
}

Problem

I am trying to read an Http response stream twice via the following: ``` HttpWebResponse response = (HttpWebResponse)request.GetResponse(); stream = response.GetResponseStream(); RssReader reader = new RssReader(stream); do { element = reader.Read(); if (element is RssChannel) { feed.Channels.Add((RssChannel)element); } } while (element != null); StreamReader sr = new StreamReader(stream); feed._FeedRawData = sr.ReadToEnd(); ``` However when the StreamReader code executes there is no data returned because the stream has now reached the end. I tried to reset the stream via stream.Position = 0 but this throws an exception (I think because the stream can't have its position changed manually). Basically, I would like to parse the stream for XML and have access to the raw data (in string format). Any ideas?

Original source

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