org.tsugi.http.HttpUtil.java Source code

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Here is the source code for org.tsugi.http.HttpUtil.java

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/*
 * Copyright (c) 2018- Charles R. Severance
 *
 * 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 org.tsugi.http;

import java.util.Enumeration;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.Cookie;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

/**
 * Some Tsugi Utility code for to make using Jackson easier to use.
 */
@SuppressWarnings("deprecation")
@Slf4j
public class HttpUtil {

    // https://stackoverflow.com/questions/18944302/how-do-i-print-the-content-of-httprequest-request
    public static void printHeaders(HttpServletRequest request) {
        Enumeration<String> headerNames = request.getHeaderNames();
        System.out.println("Headers for " + request.getRequestURI());
        while (headerNames.hasMoreElements()) {
            String headerName = headerNames.nextElement();
            System.out.println("Header Name - " + headerName + ", Value - " + request.getHeader(headerName));
        }
    }

    public static void printParameters(HttpServletRequest request) {
        System.out.println("Parameters for " + request.getRequestURI());
        Enumeration<String> params = request.getParameterNames();
        while (params.hasMoreElements()) {
            String paramName = params.nextElement();
            System.out.println("Parameter Name - " + paramName + ", Value - " + request.getParameter(paramName));
        }
    }

    public static String getCookie(HttpServletRequest request, String lookup) {
        if (request == null || lookup == null)
            return null;

        // https://stackoverflow.com/questions/11047548/getting-cookie-in-servlet
        Cookie[] cookies = request.getCookies();
        if (cookies == null)
            return null;
        for (int i = 0; i < cookies.length; i++) {
            Cookie cookie = cookies[i];
            String cookieName = cookie.getName();
            String cookieValue = cookie.getValue();
            if (StringUtils.isEmpty(cookieName))
                continue;
            if (cookieName.equalsIgnoreCase(lookup)) {
                return cookieValue;
            }
        }
        return null;
    }
}