Is there any reason for not using just gwt HTML or somthing else with
@UiHandler("loginButton") to make a RPC-call for log in?
Ex:
UiBinder:
<g:HTMLPanel>
<g:TextBox ui:field="username" />
<g:PasswordTextBox ui:field="password" />
<g:HTML ui:field="loginButton"> LOGIN </g:HTML>
</g:HTMLPanel>
Composite:
@UiHandler("loginButton")
void onLoginClick(ClickEvent e) {
// make RPC-call and validate user.....
}
Or is it just for autocomplete?
Den torsdagen den 26:e februari 2009 kl. 18:21:23 UTC+1 skrev Thomas Broyer:
>
> If you want to have browsers auto-complete username/password in your
> application's login form, you probably did (*I* did) this:
> 1. follow recommandations from
> http://code.google.com/p/google-web-toolkit-incubator/wiki/LoginSecurityFAQ,
>
> i.e. your form and fields have to be in the original markup and you
> mustn't use .submit() but let the browser submit using, say... a
> submit button?
> 2. use something like that in your code:
> // note the "true" second argument, to create a hidden iframe
> FormPanel form = FormPanel.wrap(Document.get().getElementById
> ("login"), true);
> form.addFormPanel(new FormPanel() {
> public void onSubmit(FormSubmitEvent event) {
> // do some validation before submitting (non-empty fields)
> // and call event.setCancelled(true) if needed.
> }
> public void onSubmitComplete(FormSubmitCompleteEvent event) {
> // somehow "parse" event.getResults() to know whether it
> // succeeded or not.
> }
> });
> 3. Your server have to send its response in with Content-Type:text/
> html, even if its JSON (hence the "parse" above)
>
>
> But there's actually an alternative!
>
> It never occured to me before someone pointed me to a login page that
> does it: if your form submits to a javascript: URL, then the browser's
> "auto-complete" feature will work (provided the form and fields were
> in the original HTML page markup, same limitation as above).
>
> What it means is that you can use GWT-RPC or RequestBuilder!!!
>
> Your code now looks like:
> private static native void injectLoginFunction() /*-{
> $wnd.__gwt_login = @com.example.myapp.client.App::doLogin();
> }-*/;
>
> private static void doLogin() {
> // get the fields values and do your GWT-RPC call or
> // RequestBuilder thing here.
> }
> ...
> // notice that we now pass "false" as the second argument
> FormPanel form = FormPanel.wrap(Document.get().getElementById
> ("login"), false);
> form.setAction("javascript:__gwt_login()");
>
> And of course, you can still validate the form before it's submitted:
>
> form.addFormPanel(new FormPanel() {
> public void onSubmit(FormSubmitEvent event) {
> // do some validation before submitting (non-empty fields)
> // and call event.setCancelled(true) if needed.
> }
> public void onSubmitComplete(FormSubmitCompleteEvent event) {
> // will never be called.
> }
> });
>
>
> Tested in IE7, Firefox 3.0 and Opera 10alpha; please update if it
> works (or doesn't work) for you in other browsers.
> The previous solution (using the iframe) was successfully tested in
> IE6, IE7, IE8 (beta 1 at that time), Firefox 2 and 3.0, Opera (9.62 at
> that time), Safari 3 for Windows and Google Chrome (1 and 2).
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