Based on the docs for FormPanel the server has to reply with the
content-type of text/html, otherwise there may be issues with some
browsers.  But if you do that, and send XML content it seems it has browser
issues.

For example, in FF/DevMode the SubmitCompleteEventHandler returns null for
the result.  In Chrome is returns the XML content, but it is malformed.
Some elements like <link /> were in the results as <link>, causing XML
parsing issues.

One solution I found was to return the XML as an HTML comment, prefixed by
some fake content.

For example, instead of this:
<?xml version='1.0' encoding='UTF-8'?><feed>...</feed>

I returned this:
content<!--<?xml version='1.0' encoding='UTF-8'?><feed>...</feed>-->

I can then remove the prefix "content<!--" and postfix "-->" text, and parse
what remains as XML.

Other than the fact that I don't handle the possibility of comments within
the XML content, is there any other potential issues?  Or maybe there is a
better way?

The only requirement for what I am working on is that it must use a
FormPanel submission, and parse the XML returned from the server.

Thanks.

Rob

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