Base64Utils from GWT's source does not use the standard MIME characters when encoding data to Base64. So I think thats why the browser does not display the image. To verify this, you can try and search a MIME standard Base64 encoder, convert the byte array and put the base64 string into your data url.
Depending on what you want to do with the image you can try the following: 1.) Create a class BinaryData that holds the byte array and a mime type string (in your case "image/png") 2.) Write a plain servlet that reads data from your session based on a unique id and when its a BinaryData object returns the byte array with the correct mime type (and deletes the session entry to keep things clean). 3.) Use your existing servlet that fetches the byte array image, save it into a BinaryData instance and save that instance into your server session. Then return some unique id to your app and your app will use that id to fetch the data using the servlet from 2). So basically your app asks your server to fetch an image from the web service. The server will do so and returns something like "193823903" as unique id. Now your app creates an Image widget and as URL it uses http://yourapp.com/service/binary?id=93823903. Your "binary" servlet will take the unique id, look it up in the session, found the BinaryData object with the byte array and returns the array with the specified mime type (image/png). The browser will display the image directly. The only downside is that you can only access the image once (when you clean up your session when the image is requested) or you have to write a clean up thread so that your session doesn't get larger and larger. Works great for me and I can use this for any kind of binary data like server side generated pdf's, sound files, images, etc. -- J. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/WUQA9KZ3S9kJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
