// Encode a string using RFC 5987 encoding
// encoding'lang'PercentEncodedSpecials
private string Encode5987(StringSegment input)
{
var builder = new StringBuilder("UTF-8\'\'");
for (int i = 0; i < input.Length; i++)
{
var c = input[i];
// attr-char = ALPHA / DIGIT / "!" / "#" / "$" / "&" / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
// ; token except ( "*" / "'" / "%" )
if (c > 0x7F) // Encodes as multiple utf-8 bytes
{
var bytes = Encoding.UTF8.GetBytes(c.ToString());
foreach (byte b in bytes)
{
HexEscape(builder, (char)b);
}
}
else if (!HttpRuleParser.IsTokenChar(c) || c == '*' || c == '\'' || c == '%')
{
// ASCII - Only one encoded byte
HexEscape(builder, c);
}
else
{
builder.Append(c);
}
}
return(builder.ToString());
}