Is this possible?

Harry

Firstly sorry for cross posting but not really sure which group this belongs
in?

Anyway, I have a webapp that basically consists of 2 screens, search critera
& results

I want to be able to provide a way for the user to download a zipped up
excel file of the results.

I can quite easily create a excel file using POI & zip it up using
java.util.zip which creates a zip file on the server. Then add a link to
this file on the results page which when clicked will produce the standard
download dialog box & alls well.

The problem is I have to create the zip file every time the results
generated & displayed but some users might not want this faclity!

Is it possible to have a button/link etc... that when clicked create's the
zip file & produces the download dialog box WITHOUT changing the results
page?

Any ideas?

thanks

harry

Jul 17 '05 #1

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1655

Andy Fish

yes

simply have the download URL pointing to a servlet (or whatever server side
technology you are using)

in the servlet build the zip file, set the content-type to
application/x-zip-compressed and write out the zip data as the HTTP body.

note that you with java.util.zip, you can simply open up a zipOutputStream
on the response's output stream so you don't need to save it to a file at
all.

I would also suggest the url ends in .zip as well. Sometimes IE seems to
look at the file extension of the URL as well as the content type

Andy

"Harry" <a@abc.com> wrote in message
news:WW*********************@news-text.cableinet.net...

Firstly sorry for cross posting but not really sure which group this belongs in?

Anyway, I have a webapp that basically consists of 2 screens, search critera & results

I want to be able to provide a way for the user to download a zipped up
excel file of the results.

I can quite easily create a excel file using POI & zip it up using
java.util.zip which creates a zip file on the server. Then add a link to
this file on the results page which when clicked will produce the standard
download dialog box & alls well.

The problem is I have to create the zip file every time the results
generated & displayed but some users might not want this faclity!

Is it possible to have a button/link etc... that when clicked create's the
zip file & produces the download dialog box WITHOUT changing the results
page?

Any ideas?

thanks

harry

Jul 17 '05 #2

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