How do I use C# and ASP.net to proxy a WebRequest?

Question

pretty much...i want to do something like this:

Stream Answer = WebResp.GetResponseStream();
Response.OutputStream = Answer;

Is this possible?

Answer 1

No, but you can of course copy the data, either synchronously or asynchronously.

• Allocate a buffer (like 4kb in size or so)
• Do a read, which will either return the number of bytes read or 0 if the end of the stream has been reached
• If data was received, write the amount read and loop to the read

Like so:

using (Stream answer = webResp.GetResponseStream()) {
    byte[] buffer = new byte[4096];
    for (int read = answer.Read(buffer, 0, buffer.Length); read > 0; read = answer.Read(buffer, 0, buffer.Length)) {
        Response.OutputStream.Write(buffer, 0, read);
    }
}

Answer 2

This answer has a method CopyStream to copy data between streams (and also indicates the built-in way to do it in .NET 4).

You could do something like:

using (stream answer = WebResp.GetResponseStream())
{
    CopyStream(answer, Response.OutputStream); 
    Response.Flush();
}