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Client library used for adding authentication to http messages as required by IdentityX Rest Services

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/*
* Copyright Daon.
*
* 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 com.identityx.auth.util;

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

/**
 * @since 0.1
 */
public class RequestUtils {

    /**
     * Returns {@code true} if the specified URI uses a standard port (i.e. http == 80 or https == 443),
     * {@code false} otherwise.
     *
     * @param uri
     * @return true if the specified URI is using a non-standard port, false otherwise
     */
    public static boolean isDefaultPort(URI uri) {
        String scheme = uri.getScheme().toLowerCase();
        int port = uri.getPort();
        return port <= 0 || (port == 80 && scheme.equals("http")) || (port == 443 && scheme.equals("https"));
    }

    public static String encodeUrl(String value, boolean path, boolean canonical) {
        if (value == null || value.equals("")) {
            return "";
        }

        String encoded;

        try {
            encoded = URLEncoder.encode(value, "UTF-8");
        } catch (UnsupportedEncodingException ex) {
            throw new IllegalStateException("Unable to UTF-8 encode url string component [" + value + "]", ex);
        }

        if (canonical) {
            encoded = encoded.replace("+", "%20")
                    .replace("*", "%2A")
                    .replace("%7E", "~"); //yes, this is reversed (compared to the 2 above it) intentionally

            if (path) {
                encoded = encoded.replace("%2F", "/");
            }
        }

        return encoded;
    }
}