ExportAppendTime                  = appendTime
	ExportRefererForURL               = refererForURL
	ExportServerNewConn               = (*Server).newConn
	ExportCloseWriteAndWait           = (*conn).closeWriteAndWait
	ExportErrRequestCanceled          = errRequestCanceled
	ExportErrRequestCanceledConn      = errRequestCanceledConn
	ExportErrServerClosedIdle         = errServerClosedIdle
	ExportServeFile                   = serveFile

}

var _ closeWriter = (*net.TCPConn)(nil)

// closeWriteAndWait flushes any outstanding data and sends a FIN packet (if
// client is connected via TCP), signaling that we're done. We then
// pause for a bit, hoping the client processes it before any
// subsequent RST.
//
// See https://golang.org/issue/3595
func (c *conn) closeWriteAndWait() {
	c.finalFlush()
	if tcp, ok := c.rwc.(closeWriter); ok {