Nikola Petrović a écrit :
> Hello all,
> I have a problem with base64 codec and encoding ascii characters. Here`s the
> code:
> int ok=0, bad=0;
> for(int i=128; i<256; i++){
> char c = (char)i;
> str = "" + c;
> String enc = new
> String(Base64.encodeBase64(str.getBytes()));
> String dec = new
> String(Base64.decodeBase64(enc.getBytes()));
> if(str.equals(dec)) ok++;
> else bad++;
> }
> System.out.println("ok: " + ok);
> System.out.println("bad: " + bad);
>
> I get this:
> ok: 80
> bad: 48
>
> So, simple encoding and decoding of ascii chars > 128 doesn`t work for me. Is
> there some explanation?
Both the String.getBytes() and the String constructors from bytes rely
on some charset to convet characters to bytes. I guess your JVM
configuration has some inconsistencies in the default charset. On my
Linux box with a default charset set to UTF-8, your code works well.
For robustness, I suggest you explicitely set the charset as follows:
String enc = new String(Base64.encodeBase64(str.getBytes("UTF-8")),
"US-ASCII");
String dec = new String(Base64.decodeBase64(enc.getBytes("US-ASCII")),
"UTF-8");
Luc
> I tried this on os x, java5 and java6, doesn`t work, and on java6 on solaris
> pc it does. That confuses me totally :)
>
> The other part of the problem is probably linked to this one. I`m trying to
> encode a string in my java code, and decode it in some php code that I use.
> Is that possible? I guess since base64 is a standard it should work, and yet
> it doesn`t on os x, nor on solaris :( Maybe it is linked somehow to the
> ascii char problem?
>
> Thanks,
> Nikola
>
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