C#? URL ?? Base64 ???

Base64 ???? URL ?? ??????? ?? ? ??? ???? ???? ???? ? ?????. C#?? ?? ???? Base64 ??? ??? ?? ???? ??? ?? ???? ???? ??? ??? ?????. ??? ???? ???? ?? ??("==")? ????? URL? ??? ? ??? ??? ? ????.

URL ?? ???

??? ??? ???? ?? URL ?? ???? ?? ??? ???? ?? ?? ??(" ","/","=")? URL ??? ??("-","_","")? ????. ??? ?? ?? ??? ???? ?? ???? ???? URL ????? ???? ??? ? ????.

C#?? URL ?? ??? ??

Java? ?? ?????? ?? C#?? URL ?? ??? ??? ???? ?? ????. ??? ? ?? ??? ??? ??? ??? ??? ?? ? ????.

1. ?? Base64 ???? ????? Convert.ToBase64String()? ?????.
2. ???? ????? ??? ????? TrimEnd()? ?????.
3. ?? ??? Replace()?? ????(?: " "? "-"? ??? "/"? "_"? ????).

?

byte[] toEncodeAsBytes = System.Text.ASCIIEncoding.ASCII.GetBytes("StringToEncode");
string returnValue = System.Convert.ToBase64String(toEncodeAsBytes)
        .TrimEnd(new char[] {'='}).Replace('+', '-').Replace('/', '_');

??: ??? ??? ?? ?? ?? ??? ?? ?? ?? ??? ??? ? ????.

??? ??? ??

URL ?? ??? ???? ?? ???? ?? ?????? ? ????? ??? ???? ???.

1. URL ???? ??? ?? ??? ????.
2. ??? ?? '=' ??? ???? ???? 4? ??? ????.
3. ???? ?? ?? ???? ????? Convert.FromBase64String()? ?????.

?

string incoming = returnValue
    .Replace('_', '/').Replace('-', '+');
switch(incoming.Length % 4) {
    case 2: incoming += "=="; break;
    case 3: incoming += "="; break;
}
byte[] bytes = Convert.FromBase64String(incoming);
string originalText = Encoding.ASCII.GetString(bytes);

??? ??? ???? C#?? URL ?? ???? ????? ??? ? ????. ?? ???? ??? ?????? ???? ????? ????? ???? ?? ?????? ??? ? ??? ????? ????? ?? ?????.

? ??? C#?? URL-SAFE Base64 ??? ? ???? ???? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!