Content-Length requires updating

[jabo2]

While working with Nancy's GenericFileResponse in conjunction with Nancy.Gzip responses I am getting a "Connection Reset" error from Firefox and Microsoft Edge/Chrome.

After digging into it I found that the GenericFileResponse adds Content-Length to the header (which represents the length of the file in bytes) and since the stream gets compressed by Nancy.Gzip the Content-Length being sent is no longer the same as the content being sent.

I am not sure if this project is being maintained any longer, but if there is any interest I would happy to submit a pull request. I think the simplest solution may be simply removing Content-Length from the header since this field is not required.

For now the workaround I have settled on was simply removing Content-Length from the header.