Java – how to get the response body in zuul post filter?

How to read the response body when zuul is used as a proxy in the post filter?

I try to call the code like this:

@Component
public class PostFilter extends ZuulFilter {

    private static final Logger log = LoggerFactory.getLogger(PostFilter.class);

    @Override
    public String filterType() {
        return "post";
    }

    @Override
    public int filterOrder() {
        return 2000;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        ctx.getResponseBody(); // null

        // cant't do this,cause input stream is used later in other filters and I got InputStream Closed exception
        // GZIPInputStream gzipInputStream = new GZIPInputStream(stream);
        return null;
    }

}

Solution

I succeeded in overcoming this The solution consists of four steps:

>Set CTX Getresponsedatastream() reads in bytearrayoutputstream > copy OutputStream to 2 inputstreams. > Use one of them for custom purposes. > Use the second reassignment to the context: context setResponseBody(inputStream)

>Reading a stream from point 1 will cause the stream to be unreadable again, so you pass a new stream that has not been read