Re: SEO Google Crawlable experience ?

<?xml version="1.0" encoding="UTF-8"?>
<!-- @author Ed Bras. -->
<module>
<inherits name="com.google.gwt.core.Core" />
<inherits name="com.google.gwt.user.User" />
<inherits name="com.google.gwt.user.History" />
<inherits name="com.google.gwt.user.Window" />
<inherits name="com.google.gwt.logging.LoggingDisabled" />

<inherits name="com.ited.gwt.misc.Misc" />

<!-- Where the compiler should look for the code. -->
<source path='client' />

<!-- Property indicating HTML5 pushState support. -->
<define-property name="history.pushStateSupported" values="yes,no" />

<!-- Enable/Disable HTML5 pushState based on the availability of the Javascript function. -->
<property-provider name="history.pushStateSupported">
<![CDATA[
if (typeof(window.history.pushState) == "function") {
return "yes";
}
else {
return "no";
}
]]>
</property-provider>

<!-- Constrain the pushState property for obvious cases to avoid permutation explosion. -->
<set-property name="history.pushStateSupported" value="no">
<any>
<when-property-is name="user.agent" value="ie6" />
<when-property-is name="user.agent" value="ie8" />
</any>
</set-property>

<!-- IE8 does not work with the standard implementation -->
<replace-with class="com.ited.gwt.history.client.SimpleBrowserHistory.HistoryImplIE8">
<when-type-is class="com.ited.gwt.history.client.SimpleBrowserHistory" />
<all>
<!-- prevent fallback for IE9 -->
<none>
<when-property-is name="user.agent" value="ie9" />
</none>
<when-property-is name="user.agent" value="ie8" />
</all>
</replace-with>

<!-- Configure pushState history support. -->
<replace-with class="com.ited.gwt.history.client.PushStateHistory">
<when-type-is class="com.ited.gwt.history.client.SimpleBrowserHistory" />
<all>
<when-property-is name="history.pushStateSupported" value="yes" />
</all>
</replace-with>
<replace-with class="com.ited.gwt.history.client.PushStateHistoryConverter">
<when-type-is class="com.ited.gwt.history.client.HistoryConverter" />
<all>
<when-property-is name="history.pushStateSupported" value="yes" />
</all>
</replace-with>

<!-- Configure hash history support. -->
<replace-with class="com.ited.gwt.history.client.HashHistoryConverter">
<when-type-is class="com.ited.gwt.history.client.HistoryConverter" />
<all>
<when-property-is name="history.pushStateSupported" value="no" />
</all>
</replace-with>

<!-- Configure Hyperlink replacements. -->
<replace-with class="com.ited.gwt.history.client.PushStateHyperlink">
<when-type-is class="com.google.gwt.user.client.Hyperlink" />
</replace-with>
<replace-with class="com.ited.gwt.history.client.PushStateInlineHyperlink">
<when-type-is class="com.google.gwt.user.client.InlineHyperlink" />
</replace-with>
</module>

Oeps, I wasn't finished yet, and pressed send. Let's continue were I left off:

BTW: the above rewrite rule with resource in it, can be removed if you don't have that path. Ensure to put the above in the <Directory> tag, else the REQUEST_FILENAME will not be filled yet and will contain the URI, and that's not what you want, such that it doesn't work... (took me some time to figger that out ;)

Then in the front-end, do what ever you want with the url it's start with, show the context what you want.

Then the pushState thing. I started with the gwt-pushstate project on github, but it doesn't work with gwt 2.7 due to changes in the gwt History class.

As such, I replaced the History class with my own version that I use. It can use the old url fragment style or the push state if supported (not tested all well I have to admit).

Have a look at the code attached, start with the BrowserHistory class, that is the replacement class of the gwt History class, and also contains a lot of code of that class. It will talk to a SimpleBrowserHistory class that is created through deferred binding and will use the pushState subclass if pushState is supported. The support is detected though the attached gwt file (thanks to code from gwt-pushstate on github).

I might change some thinks in the future if I have a moment and optimize thinks, but for now it works well.

Just look around in the code, and if you have any questions, just shoot.

​

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