How to use a gzip javascript file in a webapp running under tomcat

[balachandra maddina]

Hi There,

Im wondering if its possible to referr a javascript file something like
<script ... src ='scriptfile.js.gz'> in a html page where the script file is
located in one of the tomcat webapps?
if not how to send a gzip javascript file to browser? any help would be
appreciated.

Thx,
bala.

[Christopher Schultz]

Bala,

I'm wondering if its possible to refer [to] a javascript file something like
<script ... src ='scriptfile.js.gz'> in a html page where the script file is
located in one of the tomcat webapps?

Sure, you can do that. It just won't do what you expect it to.

if not how to send a gzip javascript file to browser? any help would be
appreciated.

Try enabling gzip compression in the <Connector>.

http://tomcat.apache.org/tomcat-6.0-doc/config/http.html#Standard%20Implementation

Look for the "compression" attribute. You'll probably have to change the
compressablemimeType setting from the default to include text/css.

I don't think there's a way to trick Tomcat into using a pre-compressed
image of a file in this way.

Alternatively, you could probably do something like the following:
create a servlet that does nothing but serve a file off the disk (you
might even extend the DefaultServlet). Make sure that your servlet reads
your gzip'd CSS file and serves it without modification, except to add a
"Content-Encoding" header.

Remember to ensure that the client has "Accept-Encoding: gzip" set in
the request headers... otherwise you will be serving a file that the
browser claims it can't read.

Good luck,
- -chris

[balachandra maddina]

Hi chris,

Thx for the reply. just after posting the question i tried the same
steps and the files are getting gzip.

Thank you,
bala.

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Bala,

I'm wondering if its possible to refer [to] a javascript file something like
<script ... src ='scriptfile.js.gz'> in a html page where the script file is
located in one of the tomcat webapps?

Sure, you can do that. It just won't do what you expect it to.

if not how to send a gzip javascript file to browser? any help would be
appreciated.

Try enabling gzip compression in the <Connector>.
http://tomcat.apache.org/tomcat-6.0-doc/config/http.html#Standard%20Implementation
Look for the "compression" attribute. You'll probably have to change the
compressablemimeType setting from the default to include text/css.
I don't think there's a way to trick Tomcat into using a pre-compressed
image of a file in this way.
create a servlet that does nothing but serve a file off the disk (you
might even extend the DefaultServlet). Make sure that your servlet reads
your gzip'd CSS file and serves it without modification, except to add a
"Content-Encoding" header.
Remember to ensure that the client has "Accept-Encoding: gzip" set in
the request headers... otherwise you will be serving a file that the
browser claims it can't read.
Good luck,
- -chris
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