System.Net.Http.CurlResponseHeaderReader.ReadHeader C# (CSharp) 메소드

        public bool ReadHeader(out string headerName, out string headerValue)
        {
            int index = 0;
            while (index < _span.Length && ValidHeaderNameChar(_span[index]))
            {
                index++;
            }

            if (index > 0)
            {
                // For compatability, skip past any whitespace before the colon, even though
                // the RFC suggests there shouldn't be any.
                int headerNameLength = index;
                while (index < _span.Length && IsWhiteSpaceLatin1(_span[index]))
                {
                    index++;
                }

                CheckResponseMsgFormat(index < _span.Length);
                CheckResponseMsgFormat(_span[index] == ':');
                HeaderBufferSpan headerNameSpan = _span.Substring(0, headerNameLength);
                if (!HttpKnownHeaderNames.TryGetHeaderName(_span.Buffer, _span.Length, out headerName))
                {
                    headerName = headerNameSpan.ToString();
                }
                CheckResponseMsgFormat(headerName.Length > 0);

                index++;
                headerValue = _span.Substring(index).Trim().ToString();
                return true;
            }

            headerName = null;
            headerValue = null;
            return false;
        }