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My tag files worked very well in dev server without any problem. When uploading to gae/j, I encountered the problem describe in the above mentioned issue and I could fix it according to the workaround guidelines provided in that issue. My environment: WinXP SP2 Eclipse version 3.4 GAE/J SDK 1.3.1 JDK 5.0

Just so you know, because it isn't documented, you can choose the tag name of the root element with UiBinder (the HTMLPanel(String,String) constructor), just use a tag="" attribute, e.g. <g:HTMLPanel>This will use a div element</g:HTMLPanel> <g:HTMLPanel tag='p'>While this will use a p element</g:HTMLPanel> You can then use an HTMLPanel as the root of your UiBinder and build your widget as a Composite, passing the HTMLPanel built by UiBinder to the initWidget method.

This article studies the proxy technique first and then turns to the Google AJAX Feed API method, giving you a chance to intermix Java™and JavaScript coding.

You need a service that, when given a feed URL, connects to that site, downloads its contents, and sends them back to the caller. (For a shell-line parallel, consider the wget or curl command.) You can do this many ways, and Listing 2 shows a simple way to accomplish the task. Because I decided to call my remote proxy RemoteProxy, the server-side class had to be called RemoteProxyImpl; Impl stands for "Implementation."

The SOP won't let your code get data from another site, but there's an exception: You can download and execute JavaScript code using the <script ... /> tag. If the code you download happens to include data and calls a function of yours that puts the data to good use, then you have managed to bypass the SOP. Here's the idea behind the Google AJAX Feed API: It uses the <script ... /> tag to call a Google site that works as a proxy. The remote site gets the feed data and returns it in the form of JavaScript code. The downloaded JavaScript code calls your function so you can process the incoming XML