org.apache.tajo.pullserver.HttpUtil.java Source code

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Here is the source code for org.apache.tajo.pullserver.HttpUtil.java

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/**
 * 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.tajo.pullserver;

import com.google.common.collect.Maps;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URLEncoder;
import java.util.Map;

public class HttpUtil {
    public static Map<String, String> getParams(URI uri) throws UnsupportedEncodingException {
        return getParamsFromQuery(uri.getQuery());
    }

    /**
     * It parses a query string into key/value pairs
     *
     * @param queryString decoded query string
     * @return key/value pairs parsed from a given query string
     * @throws java.io.UnsupportedEncodingException
     */
    public static Map<String, String> getParamsFromQuery(String queryString) throws UnsupportedEncodingException {
        String[] queries = queryString.split("&");

        Map<String, String> params = Maps.newHashMap();
        String[] param;
        for (String q : queries) {
            param = q.split("=");
            params.put(param[0], param[1]);
        }

        return params;
    }

    public static String buildQuery(Map<String, String> params) throws UnsupportedEncodingException {
        StringBuilder sb = new StringBuilder();

        boolean first = true;
        for (Map.Entry<String, String> param : params.entrySet()) {
            if (!first) {
                sb.append("&");
            }
            sb.append(URLEncoder.encode(param.getKey(), "UTF-8")).append("=")
                    .append(URLEncoder.encode(param.getValue(), "UTF-8"));
            first = false;
        }

        return sb.toString();
    }
}