Friday, May 31, 2013

Re: Wrong UTF-8 string parsing in GWT JSON

Dear Philippe,

You are right...
If I change the escaped ("\uXXXX") codes to UTF-16, for my example:
String response="{ \"test\" : \"\\u00c1\\u00c9\\u0170\" }"; //"ÁÉÜ" in UTF-16
All works correctly.

But I found a strange thin too:
If I disable  the"\uxxxx" escaping in JSON writer in server side, all works as expected. But this is not a good idea according to RFC4627 :((((. In this mode, the JSON string transports the non-printable characters (0xc3, 0x81, 0xc3, 0x89, 0xc5, 0xb0) ("ÁÉÚ" in UTF-8) without any encoding.... :(:(:( GWT JSON parser expands the UTF-8 character correctly, and the alert displays correct characters.

I think, JSON string transfer the characters in escaped UTF-16 encoding, but final expands/stores in String in UTF-8. Therefore, if I skip the UTF-16 escaping, I can send string in UTF-8 in raw (without escaping). :(:(:(:(

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