private void SplitHeader(AppendableCharSequence sb)
{
byte[] chars = sb.Bytes;
int length = sb.Count;
int nameEnd;
int colonEnd;
int nameStart = FindNonWhitespace(chars, 0, length, false);
for (nameEnd = nameStart; nameEnd < length; nameEnd++)
{
byte ch = chars[nameEnd];
// https://tools.ietf.org/html/rfc7230#section-3.2.4
//
// No whitespace is allowed between the header field-name and colon. In
// the past, differences in the handling of such whitespace have led to
// security vulnerabilities in request routing and response handling. A
// server MUST reject any received request message that contains
// whitespace between a header field-name and colon with a response code
// of 400 (Bad Request). A proxy MUST remove any such whitespace from a
// response message before forwarding the message downstream.
if (ch == ':' ||
// In case of decoding a request we will just continue processing and header validation
// is done in the DefaultHttpHeaders implementation.
//
// In the case of decoding a response we will "skip" the whitespace.
(!IsDecodingRequest() && IsOWS(ch)))
{
break;
}
}
if (0u >= (uint)(nameEnd - length))
{
// There was no colon present at all.
ThrowHelper.ThrowArgumentException_No_colon_found();
}
for (colonEnd = nameEnd; colonEnd < length; colonEnd++)
{
if (chars[colonEnd] == HttpConstants.Colon)
{
colonEnd++;
break;
}
}
_name = sb.SubStringUnsafe(nameStart, nameEnd);
int valueStart = FindNonWhitespace(chars, colonEnd, length, true);
if (valueStart == length)
{
_value = AsciiString.Empty;
}
else
{
int valueEnd = FindEndOfString(chars, length);
_value = sb.SubStringUnsafe(valueStart, valueEnd);
}
}