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The core HTTP and composition mechanisms of Ratpack

There is a newer version: 2.0.0-rc-1

/*
 * Copyright 2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ratpack.server.internal;

import io.netty.handler.codec.http.HttpContentCompressor;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpResponse;
import ratpack.http.internal.HttpHeaderConstants;

public class IgnorableHttpContentCompressor extends HttpContentCompressor {

  @SuppressWarnings("deprecation")
  @Override
  protected Result beginEncode(HttpResponse res, String acceptEncoding) throws Exception {
    String contentEncoding = res.headers().getAsString(HttpHeaderConstants.CONTENT_ENCODING);

    //Allow setting content encoding to identity to skip encoding this supports the Response.noCompress() call.
    if (HttpHeaderValues.IDENTITY.contentEqualsIgnoreCase(contentEncoding)) {
      // Remove header as one SHOULD NOT send Identity as content encoding.
      // This keeps with current behavior there HttpContentCompressor will leave the header in normally.
      res.headers().remove(HttpHeaderConstants.CONTENT_ENCODING);
      return null;
    }

    return super.beginEncode(res, acceptEncoding);
  }
}