/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.knox.gateway.hbase;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;

import javax.servlet.http.HttpServletRequest;

import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.methods.RequestBuilder;

class HBaseRequestUtil {
  // partial workaround for KNOX-799
  public static HttpUriRequest fixTrailingSlash(HttpUriRequest outboundRequest,
                                                HttpServletRequest inboundRequest) {
    // preserve trailing slash from inbound request in the outbound request
    if (inboundRequest.getPathInfo().endsWith("/")) {
      String[] split = outboundRequest.getURI().toString().split("\\?");
      if (!split[0].endsWith("/")) {
        outboundRequest = RequestBuilder.copy(outboundRequest)
            .setUri(split[0] + "/" + (split.length == 2 ? "?" + split[1] : "")).build();
      }
    }
    return outboundRequest;
  }

  public static URI decodeUrl(HttpServletRequest request) {
    String base = request.getRequestURI();
    StringBuilder str = new StringBuilder();
    try {
      str.append( URLDecoder.decode( base, StandardCharsets.UTF_8.name() ) );
    } catch( UnsupportedEncodingException e ) {
      str.append( base );
    } String query = request.getQueryString();
    if ( query != null ) {
      str.append( '?' );
      str.append( query );
    }
    return URI.create( str.toString() );
  }
}
