I have a project using GWT 1.7 that is able to upload a file without a
server that works great on Firefox and Chrome, however when testing IE
I get "The URL myfile.xml is invalid or violates the same-origin
security restriction" error.
My GWT standard directory structure for relevant files looks as
follows:
ClientUpload\war\ClientUpload.html
ClientUpload\war\clientupload\clientupload.nocache.js
ClientUpload\war\clientupload\myfile.xml
I wanted to be able to move the project war dir to another computer
that does not have a server and open ClientUpload.html. Right now when
ClientUpload.html is opened in Firefox or Chrome the URL is "file:///
C:/.../ClientUpload/war/ClientUpload.html" and "C:/.../ClientUpload/
war/ClientUpload.html" in IE (no file:/// attached to the front).
The code to load the myfile.xml:
public class ClientUpload implements EntryPoint {
AsyncCallback<String> callback = new AsyncCallback<String>() {
public void onFailure(final Throwable caught) {
Window.alert("failed " + caught.getMessage());
}
public void onSuccess(final String result) {
Window.alert("results: " + result);
}
};
public void onModuleLoad() {
RequestBuilder requestBuilder = new RequestBuilder
(RequestBuilder.POST,
URL.encode("myfile.xml"));
requestBuilder.setHeader("Content-Type", "text/xml;
charset=utf-8;");
try {
requestBuilder.sendRequest("", new RequestCallback() {
public void onError(final Request request,
final Throwable caught) {
callback.onFailure(caught);
}
public void onResponseReceived(final Request request,
final Response response) {
callback.onSuccess(response.getText());
}
});
}
catch(Exception e) {
callback.onFailure(e);
}
}
}
I've tried multiple ways to solve the issue for IE: moving the
myfile.xml to different directories, appending GWT.getModuleBaseURL()
to the front of the file name, using GET instead of POST, etc. In FF/
Chrome let's say the file is not found in the desired location, the
result returned is the 404 error page including the attempted path to
the file, RequestURI=/clientupload/myfile.xml
I tried previously upgrading from 1.5.2 (with which this technique
worked) to 1.5.3 which didn't work and was able to let it slide, I was
hoping that maybe it would be noticed and/or fixed by now (1.7) but no
such luck. Looking at the issue tracker I see
http://code.google.com/p/google-web-toolkit/issues/detail?id=3022 as a
first guess to where it may have stopped working for (at least my
needs) IE7 possibly IE6 (can't confirm now)
So my questions are:
Why does this work in Firefox and Chrome and not IE?
Where or what would the origin be for IE local html files?
Is there maybe a better way without a server to load a XML file into
HTML? with GWT?
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