Compression websocket messages

[repbl444]

Hello guys, I am trying to find a solution for compression websocket messages, if you can help, it will be very nice

• atmosphere version 2.7.6
• atmosphere.js 3.1.3

I want to find a way to compress messages I have in Json formats, cause they are huge,
For investigating I used meteor-chat sample and spring-boot-chat-atmosphere-sample
I found an issue about this with a link https://github.com/Atmosphere/atmosphere/issues/2039/ and did all thing to implement the compression, but as I understand it didn't work. For example, I tried to add some JSR356 support to web.xml in meteor-chat sample or init parameters to the ServletRegistrationBean in spring-boot-sample, changed configuration in domain.xml for payara5(glassfish5) and server.xml in tomcat9 to change settings of the ServletContainer. Tried to do the compression explicitly with the GZipOutputStream but I couldn't get the response from the server in a client side. I tried to add some headers to the response of websocket request like Sec-Websocket-Extensions: permessage-deflate, but in the end I couldn't add this header manually.

• for testing except chrome browser I also use wireshark
• java 1.8 from amazon
• Server name Tomcat9, Payara5

[jfarcand]

@repbl444 can you share a simple test cas on Github?

[repbl444]

I am a newby in atmosphere so maybe I do not understand something. I thought that atmosphere has something to compress messages through websocket , I just should put a flag (true) . By this flag I mean to activate for example some extensions. And JSR356 looked like the one. For me it is necessary to run it on glassfish5(payara5) and I did there some configuration like
<protocols> <protocol name="http-listener-1"> <http comet-support-enabled="true" compressable-mime-type="application/javascript,application/json" compression-min-size-bytes="1024" max-connections="250" default-virtual-server="server" compression="on"> <file-cache></file-cache> </http> <ssl></ssl> </protocol> <protocol name="http-listener-2" security-enabled="true"> <http comet-support-enabled="true" compressable-mime-type="application/javascript,application/json" compression-min-size-bytes="1024" max-connections="250" default-virtual-server="server" compression="on"> <file-cache></file-cache> </http> <ssl classname="com.sun.enterprise.security.ssl.GlassfishSSLImpl" cert-nickname="s1as"></ssl> </protocol> <protocol name="admin-listener"> <http encoded-slash-enabled="true" max-connections="250" default-virtual-server="__asadmin"> <file-cache></file-cache> </http> </protocol> </protocols>
maybe just for streaming transport I thought it should work okay
https://github.com/repbl444/atmosphere-samples/tree/master/samples/meteor-chat
I did a commit in the fork. There I have some changes in web.xml
I just didn't find an article how to activate compression with atmosphere websockets/streaming.
Maybe I did something wrong and I need some advice, thank you in advance

[repbl444]

I also add a gzip compression to the application with Spring MVC https://github.com/repbl444/SpringMVCtestCompression
compressable-mime-type="application/javascript,application/json" compression-min-size-bytes="1024" compression="on"
in payara5 in domain.xml like I did for the meteor-chat. After enabling gzip compression I can find some info, that it works
and see that the size of the messages is really decreased.

As I understand right for websocket we also can use headers like Content-Encoding or Sec-Websocket-Extensions
with the value permessage-deflate or gzip. But I did get how to turn them on.
But for now I have this Response from the server side

and this request

Could you give me an advice please?
Can I turn on a compression for websocket messages with just payara5 configuration or something with atmosphere or maybe both?

[jfarcand]

@repbl444 Salut. I don't have time right now to take a look, but I suspect you need to use Nettosphere if you want to use compression with Atmosphere. I haven't implemented the support for other server. Sorry! I will be happy to integrate your work if you take the Atmosphere code and implement it.

[repbl444]

Got it, thank you

[repbl444]

Can you give me some hints please which classes/configurations needs to be changed in atmosphere to support compression with glassfish? Thanks in advance.

[jfarcand]

@repbl444 Just write an AtmosphereInterceptor and check when the transport is websocket, compress it using an open source library.

[repbl444]

Hello, thank you for hints. Now I use atmosphere http streaming instead of websocket with a gzip compression. It needs only a configuration in a server.
<Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" compression="on" compressionMinSize="1024" compressableMimeType="text/html,text/plain,text/css,application/javascript,application/json" />
This is only thing I need to add for tomcat9 to have a compressed messages from a scheduler I have in my example
https://github.com/repbl444/spring-atmosphere-chat-example. But I need to run it in payara5/glassfish5. It works correctly in payara only when without compression. When in domain.xml I turn the compression on, the streaming connection can not be created.
<protocol name="http-listener-1"> <http comet-support-enabled="true" compressable-mime-type="text/html,text/plain,text/css,application/javascript,application/json" compression-min-size-bytes="128" max-connections="250" default-virtual-server="server"> <file-cache></file-cache> </http> <ssl></ssl> </protocol>
Configuration for domain.xml

Glassfish says that it supports the compression when the version of http/1.1 and I have the same

Maybe it is a bug or maybe I missed something. Could you give your opinion about that please?