GZIP compression does not work for responses to POST requests.

Wiremock registers GzipFilter with default configuration:

com.github.tomakehurst.wiremock.jetty9.JettyHttpServer

mockServiceContext.addFilter(GzipFilter.class, "/*", EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD));

But by default the aforementioned filter handles only GET request.

org.eclipse.jetty.servlets.GzipFilter

// public void init
tmp=filterConfig.getInitParameter("methods");
        if (tmp!=null)
        {
            StringTokenizer tok = new StringTokenizer(tmp,",",false);
            while (tok.hasMoreTokens())
                _methods.add(tok.nextToken().trim().toUpperCase(Locale.ENGLISH));
        }
        else
            _methods.add(HttpMethod.GET.asString());

// public void doFilter()
if (!_methods.contains(request.getMethod()) || isExcludedPath(requestURI))
        {
            super.doFilter(request,response,chain);
            return;
        }

[tomakehurst]

It should happen automatically provided you’re sending Accept-Encoding:gzip in the request.

[tomakehurst]

@stelarelas yes, I should have closed this issue ages ago, as it’s been fixed.

It sounds to me like you’re trying to send a non-gzipped request with a gzip header, so I’d expect it to throw an exception in that instance.