io.knotx.adapter.common.post.UrlEncodedBodyBuilder.java Source code

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Here is the source code for io.knotx.adapter.common.post.UrlEncodedBodyBuilder.java

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/*
 * Copyright (C) 2016 Cognifide Limited
 *
 * 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 io.knotx.adapter.common.post;

import io.netty.handler.codec.http.HttpConstants;
import io.vertx.rxjava.core.MultiMap;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.nio.charset.UnsupportedCharsetException;
import java.util.Iterator;
import java.util.Map.Entry;
import org.apache.commons.lang3.StringUtils;

public final class UrlEncodedBodyBuilder {

    private UrlEncodedBodyBuilder() {
        //hidden util constructor
    }

    public static String encodeBody(final MultiMap formAttributes) {
        return encodeBody(formAttributes, HttpConstants.DEFAULT_CHARSET);
    }

    public static String encodeBody(final MultiMap formAttributes, Charset charset) {
        if (formAttributes == null || formAttributes.isEmpty()) {
            return StringUtils.EMPTY;
        } else {
            Iterator<Entry<String, String>> entryIt = formAttributes.getDelegate().iterator();

            StringBuilder sb = new StringBuilder(128);
            while (entryIt.hasNext()) {
                Entry<String, String> entry = entryIt.next();
                sb.append(encodeComponent(entry.getKey(), charset));
                if (entry.getValue() != null) {
                    sb.append('=');
                    sb.append(encodeComponent(entry.getValue(), charset));
                }
                if (entryIt.hasNext()) {
                    sb.append('&');
                }
            }
            return sb.toString();
        }
    }

    private static String encodeComponent(String s, Charset charset) {
        try {
            return URLEncoder.encode(s, charset.name()).replace("+", "%20");
        } catch (UnsupportedEncodingException ignored) {
            throw new UnsupportedCharsetException(charset.name());
        }
    }
}