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copied!<p>Now I see what you want to do. And I think I might have a solution. I have used parts of this approach in a output cache solution a while back, so I think it will work.</p> <p>First you need your own stream class that looks like this:</p> <pre><code>private class CapturingResponseFilter : Stream { private readonly Stream _sink; private readonly MemoryStream _mem; public CapturingResponseFilter(Stream sink) { _sink = sink; _mem = new MemoryStream(); } public override bool CanRead { get { return true; } } public override bool CanSeek { get { return false; } } public override bool CanWrite { get { return false; } } public override long Length { get { return 0; } } public override long Position { get; set; } public override long Seek(long offset, SeekOrigin direction) { return 0; } public override void SetLength(long length) { _sink.SetLength(length); } public override void Close() { _sink.Close(); _mem.Close(); } public override void Flush() { _sink.Flush(); } public override int Read(byte[] buffer, int offset, int count) { return _sink.Read(buffer, offset, count); } public override void Write(byte[] buffer, int offset, int count) { _mem.Write(buffer, 0, count); } public string GetContents(Encoding enc) { var buffer = new byte[_mem.Length]; _mem.Position = 0; _mem.Read(buffer, 0, buffer.Length); return enc.GetString(buffer, 0, buffer.Length); } } </code></pre> <p>And then you do something like this in your action filter:</p> <pre><code>private Stream _originalOutputStream; public override void OnActionExecuting(ActionExecutingContext filterContext) { _originalOutputStream = filterContext.HttpContext.Response.Filter; filterContext.HttpContext.Response.Flush(); filterContext.HttpContext.Response.Filter = new CapturingResponseFilter(filterContext.HttpContext.Response.Filter); } public override void OnResultExecuted(ResultExecutedContext filterContext) { if (_originalOutputStream == null) return; filterContext.HttpContext.Response.Flush(); var capturingResponseFilter = (CapturingResponseFilter)filterContext.HttpContext.Response.Filter; filterContext.HttpContext.Response.Filter = _originalOutputStream; var textWritten = capturingResponseFilter.GetContents(filterContext.HttpContext.Response.ContentEncoding); //Do what you want with your text (textWritten). filterContext.HttpContext.Response.Write(textWritten); } </code></pre> <p>I would consider it a little bit of a hack solution. But I haven't seen anything that isn't.</p>

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