[Seaside] How-to upload and view image ?

[Hilaire Fernandes]

Hello Mang, 

Thanks for your tips.

Yesterday I have explored Andreas way of doing the stuff, and I found
that while doing a little bit differently, it was possible to avoid most
of the crap to dermine mime type and image size:

1. instead of encapsulating WAFile::content, encapsulate  WAFile itself,
you get the mime type for free from the contentType method, so
AsMIMEDocument just need to be a wraper to it

2. Returning a non numeric from heigh and width, will just let the
browser guess the default size of the image. I return an empty string '', in this case
the html rendered code looks like:

<img width="" height="" border="0" alt="" src="/seaside/test?_s=igNqaPJRJWPBTrOD" />

Hilaire