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/*
 * Copyright 2021 Google LLC
 *
 * 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
 *
 *     https://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 com.google.apphosting.runtime.jetty.ee10;

import org.eclipse.jetty.http.HttpField;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpHeader;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Response;

public class IgnoreContentLengthResponseWrapper extends Response.Wrapper {

  private final HttpFields.Mutable.Wrapper httpFields;

  public IgnoreContentLengthResponseWrapper(Request request, Response response) {
    super(request, response);

    httpFields =
        new HttpFields.Mutable.Wrapper(response.getHeaders()) {
          @Override
          public HttpField onAddField(HttpField field) {
            if (!HttpHeader.CONTENT_LENGTH.is(field.getName())) {
              return super.onAddField(field);
            }
            return null;
          }
        };
  }

  @Override
  public HttpFields.Mutable getHeaders() {
    return httpFields;
  }
}