public static long GetContentLength(IHttpMessage message)
{
if (message.Headers.TryGet(HttpHeaderNames.ContentLength, out ICharSequence value))
{
return(CharUtil.ParseLong(value));
}
// We know the content length if it's a Web Socket message even if
// Content-Length header is missing.
long webSocketContentLength = GetWebSocketContentLength(message);
if (webSocketContentLength >= 0)
{
return(webSocketContentLength);
}
// Otherwise we don't.
return(ThrowHelper.ThrowFormatException_HeaderNotFound());
}