On 21 juil, 15:47, Stuart_L <[email protected]> wrote:
> Hi Manolo,
>
> Actually I think the problem may be due to the HTML form response
> rather than the XML parser.
>
> Our system works by using a FormPanel with a FileUpload object to
> upload a zip file to a servlet. The servlet then processes this and
> creates an XML file detailing the zip file contents. The FormHandler -
> onSubmitComplete(FormSubmitCompleteEvent event) listener receives the
> XML string response from the servlet.
> However the problem is the FormSubmitCompleteEvent will only accept
> content that is of MIME type text/html - it returns null if you try to
> send back text/xml or application/xml.
>
> So I think that as it is text/html being returned by the servlet it is
> all being converted to lowercase as html is case-insensitive.
Right, if you just send XML labeled as being text/html, it'll be
parsed as HTML and then the FormPanel will re-serialize it with the
help of the "innerHTML" property.
> Does anyone have any other way to submit a zip file to a servlet and
> return an XML string?
You can try two things (amongst probably many others):
- prefix your XML with "<plaintext>" or wrap it within <xmp> (they
are roughly equivalent to <![CDATA[]]> in the text/html world) and of
course account for it when parsing with XMLParser
- HTML-escape your XML (i.e. < instead of "<" and & instead of
"&") before sending it to the browser, that way it won't be parsed as
HTML markup, but you'll have to un-escape it on the client side; to
unescape, in your GWT code, you can create a dummy DIV element, set
the form's result with setInnerHTML and get it back with getInnerText
(or just do string replacements of & and <, but in my opinion
the setInnerHTML/getInnerText is more robust re. non-Windows-1252
characters, which the browser might convert into character references
when serializing using innerHTML)
...of course, it's far easier to just not use square brackets and
ampersands in your response... (e.g. JSON with \uXXXX-escaped "<" and
"&"), and do not count too much on whitespace being preserved too.
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