private ParsingResult ParseRawPath(Encoding encoding)
{
Debug.Assert(encoding != null, "'encoding' must be assigned.");
int index = 0;
char current = '\0';
while (index < _rawPath.Length)
{
current = _rawPath[index];
if (current == '%')
{
// Assert is enough, since http.sys accepted the request string already. This should never happen.
Debug.Assert(index + 2 < _rawPath.Length, "Expected >=2 characters after '%' (e.g. %2F)");
index++;
current = _rawPath[index];
if (current == 'u' || current == 'U')
{
// We found "%u" which means, we have a Unicode code point of the form "%uXXXX".
Debug.Assert(index + 4 < _rawPath.Length, "Expected >=4 characters after '%u' (e.g. %u0062)");
// Decode the content of rawOctets into percent encoded UTF-8 characters and append them
// to requestUriString.
if (!EmptyDecodeAndAppendRawOctetsList(encoding))
{
return ParsingResult.EncodingError;
}
if (!AppendUnicodeCodePointValuePercentEncoded(_rawPath.Substring(index + 1, 4)))
{
return ParsingResult.InvalidString;
}
index += 5;
}
else
{
// We found '%', but not followed by 'u', i.e. we have a percent encoded octed: %XX
if (!AddPercentEncodedOctetToRawOctetsList(encoding, _rawPath.Substring(index, 2)))
{
return ParsingResult.InvalidString;
}
index += 2;
}
}
else
{
// We found a non-'%' character: decode the content of rawOctets into percent encoded
// UTF-8 characters and append it to the result.
if (!EmptyDecodeAndAppendRawOctetsList(encoding))
{
return ParsingResult.EncodingError;
}
// Append the current character to the result.
_requestUriString.Append(current);
index++;
}
}
// if the raw path ends with a sequence of percent encoded octets, make sure those get added to the
// result (requestUriString).
if (!EmptyDecodeAndAppendRawOctetsList(encoding))
{
return ParsingResult.EncodingError;
}
return ParsingResult.Success;
}
