server: Enable GZIP encoding for TSP HTTP replies.

Bug 581374

[Added] GZIP encoding for TSP HTTP replies

Change-Id: I2570a978b1f206549cce29069cf92e297c94acaf
Signed-off-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass.incubator/org.eclipse.tracecompass.incubator/+/199458
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Hoang Thuan Pham <hoangpham.eclipse@gmail.com>

trace-server/org.eclipse.tracecompass.incubator.trace.server.jersey.rest.core/src/org/eclipse/tracecompass/incubator/internal/trace/server/jersey/rest/core/webapp/WebApplication.java

@@ -34,7 +34,9 @@
 import org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.services.XmlManagerService;
 import org.eclipse.tracecompass.tmf.core.TmfCommonConstants;
 import org.eclipse.tracecompass.tmf.core.TmfProjectNature;
+import org.glassfish.jersey.message.GZipEncoder;
 import org.glassfish.jersey.server.ResourceConfig;
+import org.glassfish.jersey.server.filter.EncodingFilter;
 import org.glassfish.jersey.servlet.ServletContainer;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.FrameworkUtil;
@@ -138,6 +140,7 @@ protected void registerResourcesAndMappers(ResourceConfig rc) {
         rc.register(XmlManagerService.class);
         rc.register(CORSFilter.class);
         rc.register(JacksonObjectMapperProvider.class);
+        EncodingFilter.enableFor(rc, GZipEncoder.class);
         rc.register(OpenApiResource.class);
     }