How to convert a base64 String to byte array with Gwt client side code?
This link shows a encode decode, for base64 but not to byte[] array
You have two options:
1- Use native JS methods btoa and atob, and convert the returned string to a java byte[]
array:
native String btoa(String b64) /*-{
return btoa(b64);
}-*/;
...
byte[] result = btoa(myBase64Data).getBytes();
2- Use a pure java implementation of Base64 algorithm. You can just copy the Base64Utils.java included in the gwt-user.jar, and copy it to your client package, and use its methods:
import my.project.namespace.client.Base64Utils;
...
byte[] result = Base64Utils.fromBase64(myBase64Data);
Normally I use #1 for IE10, FF and webkit browsers, and #2 for old IE.