compress html

[Tony Xiao]

Is there a way to either tidy up or compress the html page that's
generated by play template engine? I usually end up with tremendous
amount of white space and it costs quite a bit of bandwidth and more
importantly load speed.

So basically something like greenscript for html?

[Steve Chaloner]

You could try adding a @Finally method to your controllers which acts
on the contents of response.out, but this is just off the top of my
head - no idea if it works or not.

[Justin Holmes]

http://code.google.com/p/htmlcompressor/

String html = getHtml(); //your external method to get html from
memory, file, url etc.
HtmlCompressor compressor = new HtmlCompressor();
String compressedHtml = compressor.compress(html);

You could write a plugin which scans your views directory and then
writes out the compressed version

[Justin Holmes]

or just run it using the command line

java -jar htmlcompressor-0.9.6.jar --compress-js /path/original/
test.html > /path/compressed/test-compressed.html

[Guillaume Bort]

If bandwidth is your main concern you should activate Gzip compression
on your proxy server.

http://httpd.apache.org/docs/2.0/mod/mod_deflate.html

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[Tony Xiao]

Ah, good to know. I'm running play by itself at the moment but will certainly use the mod when Apache comes into play (no pun intended). 

[Tony Xiao]

Cool stuff, do you think it would be more efficient to compress the template itself rather than to compress the output every time a request comes in? 

How easy would it be to write a plugin that does nothing other than compressing templates? Would it be worth the effort?

[Kim Kha Nguyễn]

It works for me. Add this to your controller.

@Finally
static void compress() throws IOException {
    if (Play.mode.isProd()) {
        String html = response.out.toString();

        HtmlCompressor compressor = new HtmlCompressor();

        compressor.setRemoveIntertagSpaces(true);
        compressor.setRemoveSurroundingSpaces("br,p,span,a");
        compressor.setCompressCss(true);

        String compressedHtml = compressor.compress(html);
        response.out = new ByteArrayOutputStream(4000);
        response.out.write(compressedHtml.getBytes());
    }
}

You must add HTMLCompressor and YUI Compressor to your build path

[Dmitry Petrashko]

Hi!
Do you know how to add this to play 2.0?

Thanks in advance!

[Marcel Klemenz]

please have a look at minifymod https://groups.google.com/forum/#!topic/play-framework/x3SNGni4ZkA
it supports minify and gzip responses in play one.

greets,
maklemenz

[Federico Tolomei]

Is there something similar available for play two ? As far I can see
the interceptors has not access to the response output...

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