hopsworks-master/hopsworks-api/src/main/java/io/hops/hopsworks/api/kibana/MyRequestWrapper.java
/*
 * Changes to this file committed after and not including commit-id: ccc0d2c5f9a5ac661e60e6eaf138de7889928b8b
 * are released under the following license:
 *
 * This file is part of Hopsworks
 * Copyright (C) 2018, Logical Clocks AB. All rights reserved
 *
 * Hopsworks is free software: you can redistribute it and/or modify it under the terms of
 * the GNU Affero General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * Hopsworks is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.  See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License along with this program.
 * If not, see <https://www.gnu.org/licenses/>.
 *
 * Changes to this file committed before and including commit-id: ccc0d2c5f9a5ac661e60e6eaf138de7889928b8b
 * are released under the following license:
 *
 * Copyright (C) 2013 - 2018, Logical Clocks AB and RISE SICS AB. All rights reserved
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or
 * substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package io.hops.hopsworks.api.kibana;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

/**
 *
 * Taken from
 * http://natch3z.blogspot.se/2009/01/read-request-body-in-filter.html
 */
public class MyRequestWrapper extends HttpServletRequestWrapper {

  private final String body;

  public MyRequestWrapper(HttpServletRequest request) throws IOException {
    super(request);
    StringBuilder stringBuilder = new StringBuilder();
    BufferedReader bufferedReader = null;
    try {
      InputStream inputStream = request.getInputStream();
      if (inputStream != null) {
        if (request.getCharacterEncoding() != null) {
          bufferedReader = new BufferedReader(new InputStreamReader(inputStream,
                  request.getCharacterEncoding()));
        } else {
          bufferedReader
                  = new BufferedReader(new InputStreamReader(inputStream));
        }
        char[] charBuffer = new char[128];
        int bytesRead = -1;
        while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
          stringBuilder.append(charBuffer, 0, bytesRead);
        }
      } else {
        stringBuilder.append("");
      }
    } catch (IOException ex) {
      throw ex;
    } finally {
      if (bufferedReader != null) {
        try {
          bufferedReader.close();
        } catch (IOException ex) {
          throw ex;
        }
      }
    }
    body = stringBuilder.toString();
  }

  @Override
  public ServletInputStream getInputStream() throws IOException {
    final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(
            body.getBytes());
    ServletInputStream servletInputStream = new ServletInputStream() {
      public int read() throws IOException {
        return byteArrayInputStream.read();
      }

      @Override
      public boolean isFinished() {
        throw new UnsupportedOperationException("Not supported yet.");
      }

      @Override
      public boolean isReady() {
        throw new UnsupportedOperationException("Not supported yet.");
      }

      @Override
      public void setReadListener(ReadListener readListener) {
        throw new UnsupportedOperationException("Not supported yet.");
      }

    };
    return servletInputStream;
  }

  @Override
  public BufferedReader getReader() throws IOException {
    return new BufferedReader(new InputStreamReader(this.getInputStream()));
  }

  public String getBody() {
    return this.body;
  }

}
