java中将http 切换成 https

逃离我推掉我的手 2023-01-18 09:18 78阅读 0赞

public class HttpsUtil { 
    
        private static final String HTTPS = "https://";
    
        private static final String HTTP = "http://";
    
        /** * https 切换 （不包含scheme，http://） * @param request * @param url * @return */
        public static String httpsSwitch(HttpServletRequest request, String url, String httpsSwitch, String appServer){ 
            if(StringUtils.isBlank(url)){ 
                return url;
            }
            if ("0".equals(httpsSwitch)) { 
                return url;
            }
            String newUrl = "";
            String host = request.getHeader("host");
            if (StringUtils.isBlank(host)) { 
                host = appServer.replace("http://","");
            }
            host = host.replace(":80", "");
            newUrl = HTTPS + host + request.getContextPath() + url;
            return newUrl;
        }
    
        /** * https 切换（包含scheme，http://），url含有端口不替换 * @param url * @return */
        public static String httpsSwitch(String url, String httpsSwitch){ 
            if(StringUtils.isBlank(url)){ 
                return url;
            }
            if ("0".equals(httpsSwitch)) { 
                return url;
            }
            String newUrl = "";
            List<String> newUrlList = new ArrayList<>();
            if (url.contains("http://")) { 
                replaceHttp(url, newUrl, newUrlList);
                if (!CollectionUtils.isEmpty(newUrlList)) { 
                    newUrl = newUrlList.get(0);
                }
            } else { 
                newUrl = url;
            }
            return newUrl;
        }
    
        /** * 替换http * @param url * @param newUrl * @param newUrlList * @return */
        private static void replaceHttp(String url, String newUrl, List<String> newUrlList) { 
            String scheme = "";
            String context = "";
            String[] array = url.split("://", 2);
            if (array.length > 0) { 
                scheme = array[0];
                context = array[1];
            }
    
            // 是否含有端口号
            boolean containsPort = containsPort(context);
            // 不含端口号才替换
            if (!containsPort) { 
                scheme = scheme.replaceFirst("http", HTTPS);
            } else { 
                scheme = HTTP;
            }
            newUrl = newUrl + scheme;
            // 后面url是否含有://
            boolean contains = context.contains("://");
            if (contains) { 
                replaceHttp(context, newUrl, newUrlList);
            } else { 
                newUrl = newUrl + context;
                newUrlList.add(newUrl);
            }
        }
    
        /** * 是否含有端口号 * @param url * @return */
        private static boolean containsPort(String url) { 
            if (StringUtils.isNotBlank(url)) { 
                int firstIndex = url.indexOf("/");
                if (firstIndex != -1) { 
                    String remoteAddr = url.substring(0, firstIndex);
                    if (remoteAddr.contains(":")) { 
                        return true;
                    }
                } else { 
                    if (url.contains(":")) { 
                        return true;
                    }
                }
            }
            return false;
        }
    
    }