Cannot read body data from web api POST

The problem is that with the Web Api the body can only be read once. I had an HTTP module running that was logging all the details of the request and was reading through the body.

It's ugly, but you it seems from initial tinkering that you can, in fact, replace the Content in DelegatingHandler ...

protected override Task SendAsync(
          HttpRequestMessage request,
          CancellationToken cancellationToken)
      {                    
          Stream stream = new MemoryStream();

          request.Content.ReadAsStreamAsync().Result.CopyTo(stream);
          stream.Seek(0,SeekOrigin.Begin);

          // copy off the content "for later"
          string query = new StreamReader(stream).ReadToEnd();
          stream.Seek(0,SeekOrigin.Begin);

          // if further processing depends on content type
          // go ahead and grab current value
          var contentType = request.Content.Headers.ContentType;

          request.Content = new StreamContent(stream);
          request.Content.Headers.ContentType = contentType;

          return base.SendAsync(request, cancellationToken);
     }

I have no idea if this is good form or bad (suspect bad), but .... it seems to work and follows model I've seen recommended for those that need to modify request headers and content "on the way in" with a DelegatingHandler.

Your mileage may vary substantially.