Connector compressibleMimeType

[Martynas Jusevičius <ma...@atomgraph.com>]

Hi,

I enabled GZip compression on <Connector> using 8.0.44.

Then I noticed that text/html documents are getting compressed, but
others were not.

I guess this is due to the default compressibleMimeType? Which is
"text/html,text/xml,text/plain,text/css,text/javascript,application/javascript".
https://tomcat.apache.org/tomcat-8.0-doc/config/http.html

What would be the downside if I specified compressibleMimeType to
compress all media types? Including binary files etc.
I guess that would be compressibleMimeType="*/*".

Thanks.


Martynas

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Re: Connector compressibleMimeType

[Christopher Schultz <ch...@christopherschultz.net>]

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Martynas,

On 3/26/20 07:17, Martynas Jusevičius wrote:
> I enabled GZip compression on <Connector> using 8.0.44.

You need to upgrade. Support for Tomcat 8.0 ended nearly 2 years ago:
http://tomcat.apache.org/tomcat-80-eol.html

> Then I noticed that text/html documents are getting compressed,
> but others were not.
>
> I guess this is due to the default compressibleMimeType? Which is
> "text/html,text/xml,text/plain,text/css,text/javascript,application/ja
vascript".
>
>
https://tomcat.apache.org/tomcat-8.0-doc/config/http.html

(We should probably add: application/json, application/xml,
application/xhtml+xml, and application/soap+xml. Some Tomcat versions
already have these in the default default.)

> What would be the downside if I specified compressibleMimeType to
> compress all media types? Including binary files etc. I guess that
> would be compressibleMimeType="*/*".

This will not work, since Tomcat doesn't perform MIME-type globbing or
pattern-matching. The docs say it's a list of MIME types, not a
pattern or anything like that.

If you were to enable it for all types, you may compress
already-compressed data. That usually results in an increase in size,
so wasted effort all around.

What kinds of media-types are you hoping to compress that aren't
already on the default list?

- -chris
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