public static string UrlEncode(string s, Encoding encoding)
{
int length;
if (s == null || (length = s.Length) == 0)
{
return(s);
}
bool flag = false;
foreach (char c in s)
{
if (c < '0' || (c < 'A' && c > '9') || (c > 'Z' && c < 'a') || c > 'z')
{
if (!HttpUtility.NotEncoded(c))
{
flag = true;
break;
}
}
}
if (!flag)
{
return(s);
}
if (encoding == null)
{
encoding = Encoding.UTF8;
}
byte[] bytes = new byte[encoding.GetMaxByteCount(length)];
int bytes2 = encoding.GetBytes(s, 0, length, bytes, 0);
return(Encoding.ASCII.GetString(HttpUtility.UrlEncodeToBytesInternal(bytes, 0, bytes2)));
}
private static void UrlEncodeChar(char c, Stream result, bool isUnicode)
{
if (c > 'ÿ')
{
result.WriteByte(37);
result.WriteByte(117);
int num = (int)(c >> 12);
result.WriteByte((byte)HttpUtility._hexChars[num]);
num = (int)(c >> 8 & '\u000f');
result.WriteByte((byte)HttpUtility._hexChars[num]);
num = (int)(c >> 4 & '\u000f');
result.WriteByte((byte)HttpUtility._hexChars[num]);
num = (int)(c & '\u000f');
result.WriteByte((byte)HttpUtility._hexChars[num]);
return;
}
if (c > ' ' && HttpUtility.NotEncoded(c))
{
result.WriteByte((byte)c);
return;
}
if (c == ' ')
{
result.WriteByte(43);
return;
}
if (c < '0' || (c < 'A' && c > '9') || (c > 'Z' && c < 'a') || c > 'z')
{
if (isUnicode && c > '\u007f')
{
result.WriteByte(37);
result.WriteByte(117);
result.WriteByte(48);
result.WriteByte(48);
}
else
{
result.WriteByte(37);
}
int num2 = (int)(c >> 4);
result.WriteByte((byte)HttpUtility._hexChars[num2]);
num2 = (int)(c & '\u000f');
result.WriteByte((byte)HttpUtility._hexChars[num2]);
}
else
{
result.WriteByte((byte)c);
}
}