Re: [basex-talk] Activating gzip compression

Hi Omar,

I can not get it to work either, yet:

...

• No content-encoding is specified by the resource

I found no way to not specify an encoding for whatever I return in RESTXQ. If I don't specify anything it's UTF-8. it shows up as "; character-set=UTF-8"I did not find a way to specify no encoding. Maybe unrelated but perhaps that is a problem.

Content-Encoding denotes how the content has been encoded (gzip, deflate, etc.) => https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Encoding https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Encoding that’s not the character encoding (such as UTF8). So the GZIP handler not working correctly is most probably not due to the UTF8 Encoding you are seeing.

Actually I did not get the GzipHandler working, even using the DefaultServlet ( => requests to /static) instead of BaseX’ RestXQServlet and I found this comment that states:

https://stackoverflow.com/questions/38635262/jetty-9-and-gziphandler https://stackoverflow.com/questions/38635262/jetty-9-and-gziphandlerThe implementation of Gzip support in Jetty is now based on a Container HTTP Output Interceptor pattern. This means GzipHandler has to be defined at a point in the Jetty Handler tree before your WebApp and its WebAppContext even exists.

I’m by no means an expert on servlets, so my conclusions might be wrong!

Best Michael

Am 26.02.2019 um 18:27 schrieb Omar Siam Omar.Siam@oeaw.ac.at:

Hi,

I tried both ways of enabling gzip compression for JSON and js (and others). I can't see it actually working. The GzipFilter method from the web.xml sample seems to be deprecated with a warning of "it is bug ridden" ... But then in a browser debugger I cannot see it actually zipping anything.

I trief to enable this in my BaseX 9.1.2 instance using

<filter> <filter-name>GzipFilter</filter-name> <filter-class>org.eclipse.jetty.servlets.GzipFilter</filter-class> <init-param> <param-name>mimeTypes</param-name> <param-value>text/html,text/xml,text/ecmascript,application/xhtml+xml,application/json,application/javascript,image/svg+xml</param-value> </init-param> </filter> <filter-mapping> <filter-name>GzipFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> The GzipHandler method seems to get loaded but then also in a browser debugger I cannot see it actually zipping anything.

For the GzipHandler the documentation https://www.eclipse.org/jetty/documentation/current/gzip-filter.html https://www.eclipse.org/jetty/documentation/current/gzip-filter.html talks about when it actually gets invoked and mentions:

• No content-encoding is specified by the resource

I found no way to not specify an encoding for whatever I return in RESTXQ. If I don't specify anything it's UTF-8. it shows up as "; character-set=UTF-8"I did not find a way to specify no encoding. Maybe unrelated but perhaps that is a problem.

I modified webapp/WEB-INF/jetty.xml like this so it uses the GzipHandler (copied from the current jetty distribution):

<Configure id="Server" class="org.eclipse.jetty.server.Server"> <!-- Default connector. The Jetty stop port can be specified in the .basex or pom.xml configuration file. --> <Call name="addConnector"> ... </Call> <Call name="insertHandler"> <Arg> <New id="GzipHandler" class="org.eclipse.jetty.server.handler.gzip.GzipHandler"> <Set name="minGzipSize"><Property name="jetty.gzip.minGzipSize" deprecated="gzip.minGzipSize" default="2048"/></Set> <Set name="checkGzExists"><Property name="jetty.gzip.checkGzExists" deprecated="gzip.checkGzExists" default="false"/></Set> <Set name="compressionLevel"><Property name="jetty.gzip.compressionLevel" deprecated="gzip.compressionLevel" default="-1"/></Set> <Set name="inflateBufferSize"><Property name="jetty.gzip.inflateBufferSize" default="0"/></Set> <Set name="deflaterPoolCapacity"><Property name="jetty.gzip.deflaterPoolCapacity" default="-1"/></Set> <Set name="syncFlush"><Property name="jetty.gzip.syncFlush" default="false" /></Set>

    <Set name="excludedAgentPatterns">
      <Array type="String">
        <Item><Property name="jetty.gzip.excludedUserAgent" deprecated="gzip.excludedUserAgent" default=".*MSIE.6\.0.*"/></Item>
      </Array>
    </Set>

    <Set name="includedMethodList"><Property name="jetty.gzip.includedMethodList" default="GET" /></Set>
    <Set name="excludedMethodList"><Property name="jetty.gzip.excludedMethodList" default="" /></Set>

  </New>
</Arg>

</Call> </Configure> I hope there is a way to get this to work.

Best regards

Omar Siam