com.wavefront.agent.channel.DisableGZIPEncodingInterceptor Maven / Gradle / Ivy

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Service for batching and relaying metric traffic to Wavefront

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package com.wavefront.agent.channel;

import java.io.IOException;
import java.util.logging.Logger;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.ext.WriterInterceptor;
import javax.ws.rs.ext.WriterInterceptorContext;

/**
 * This RESTEasy interceptor allows disabling GZIP compression even for methods annotated with @GZIP
 * by removing the Content-Encoding header. RESTEasy always adds "Content-Encoding: gzip" header
 * when it encounters @GZIP annotation, but if the request body is actually sent uncompressed, it
 * violates section 3.1.2.2 of RFC7231.
 *
 * Created by [email protected] on 6/9/17.
 */
public class DisableGZIPEncodingInterceptor implements WriterInterceptor {
  private static final Logger logger =
      Logger.getLogger(DisableGZIPEncodingInterceptor.class.getCanonicalName());

  public DisableGZIPEncodingInterceptor() {}

  public void aroundWriteTo(WriterInterceptorContext context)
      throws IOException, WebApplicationException {
    logger.fine("Interceptor : " + this.getClass().getName() + ",  Method : aroundWriteTo");
    Object encoding = context.getHeaders().getFirst("Content-Encoding");
    if (encoding != null && encoding.toString().equalsIgnoreCase("gzip")) {
      context.getHeaders().remove("Content-Encoding");
    }
    context.proceed();
  }
}