no.kantega.commons.util.URLHelper.java Source code

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Here is the source code for no.kantega.commons.util.URLHelper.java

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/*
 * Copyright 2009 Kantega AS
 *
 * 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 no.kantega.commons.util;

import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServletRequest;

import static org.apache.commons.lang3.StringUtils.isNotBlank;

public class URLHelper {

    public static String getRootURL(HttpServletRequest request) {
        return getServerURL(request) + request.getContextPath() + "/";
    }

    public static String getCurrentUrl(HttpServletRequest request) {
        String url = request.getRequestURI();
        String originalUri = (String) request.getAttribute("javax.servlet.error.request_uri");
        if (originalUri != null) {
            // Call via 404
            url = originalUri;
        }
        return url;
    }

    /**
     * @param request - current request
     * @return scheme, servername and port. If port is 80 or 443 it is omitted.
     */
    public static String getServerURL(HttpServletRequest request) {
        int port = request.getServerPort();
        String portStr = isNormalPort(port) ? "" : ":" + port;

        return request.getScheme() + "://" + request.getServerName() + portStr;
    }

    private static boolean isNormalPort(int port) {
        return port == 80 || port == 443;
    }

    public static String getUrlWithHttps(HttpServletRequest request) {
        StringBuilder sb = new StringBuilder(getServerURL(request).replaceFirst("http:", "https:"));
        sb.append(request.getRequestURI());

        String queryString = request.getQueryString();
        if (isNotBlank(queryString)) {
            sb.append("?").append(queryString);
        }
        return sb.toString();
    }

    /**
     * Returns the actual URL requested by the client
     * @param request
     * @return String URL requested by client
     */
    public static String getRequestedUrl(HttpServletRequest request) {
        StringBuilder urlBuilder = new StringBuilder(getServerURL(request));

        // URI
        urlBuilder.append(request.getAttribute(RequestDispatcher.FORWARD_REQUEST_URI));

        // Query params
        if (request.getQueryString() != null && !request.getQueryString().isEmpty()) {
            urlBuilder.append("?").append(request.getQueryString());
        }

        return urlBuilder.toString();
    }
}