乐优购物车微服务过滤拦截器
4.1.2.配置公钥
leyou: jwt: pubKeyPath: D:/heima/rsa/rsa.pub # 公钥地址 cookieName: LY_TOKEN # cookie的名称
4.1.3.加载公钥
代码：
@ConfigurationProperties(prefix = "leyou.jwt")
public class JwtProperties {
private String pubKeyPath;// 公钥
private PublicKey publicKey; // 公钥
private String cookieName;
private static final Logger logger = LoggerFactory.getLogger(JwtProperties.class);
@PostConstruct
public void init(){
try {
// 获取公钥和私钥
this.publicKey = RsaUtils.getPublicKey(pubKeyPath);
} catch (Exception e) {
logger.error("初始化公钥失败！", e);
throw new RuntimeException();
}
}
public String getPubKeyPath() {
return pubKeyPath;
}
public void setPubKeyPath(String pubKeyPath) {
this.pubKeyPath = pubKeyPath;
}
public PublicKey getPublicKey() {
return publicKey;
}
public void setPublicKey(PublicKey publicKey) {
this.publicKey = publicKey;
}
public String getCookieName() {
return cookieName;
}
public void setCookieName(String cookieName) {
this.cookieName = cookieName;
}
}
4.1.4.编写拦截器
因为很多接口都需要进行登录，我们直接编写SpringMVC拦截器，进行统一登录校验。同时，我们还要把解析得到的用户信息保存起来，以便后续的接口可以使用。
代码：
public class LoginInterceptor extends HandlerInterceptorAdapter {
private JwtProperties jwtProperties;
// 定义一个线程域，存放登录用户
private static final ThreadLocal tl = new ThreadLocal<>();
public LoginInterceptor(JwtProperties jwtProperties) {
this.jwtProperties = jwtProperties;
}
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
// 查询token
String token = CookieUtils.getCookieValue(request, "LY_TOKEN");
if (StringUtils.isBlank(token)) {
// 未登录,返回401
response.setStatus(HttpStatus.UNAUTHORIZED.value());
return false;
}
// 有token，查询用户信息
try {
// 解析成功，证明已经登录
UserInfo user = JwtUtils.getInfoFromToken(token, jwtProperties.getPublicKey());
// 放入线程域
tl.set(user);
return true;
} catch (Exception e){
// 抛出异常，证明未登录,返回401
response.setStatus(HttpStatus.UNAUTHORIZED.value());
return false;
}
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
tl.remove();
}
public static UserInfo getLoginUser() {
return tl.get();
}
}
注意：
-
这里我们使用了
ThreadLocal来存储查询到的用户信息，线程内共享，因此请求到达Controller后可以共享User -
并且对外提供了静态的方法：
getLoginUser()来获取User信息
package com.leyou.common.utils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
/**
*
* Cookie 工具类
*
*/
public final class CookieUtils {
static final Logger logger = LoggerFactory.getLogger(CookieUtils.class);
/**
* 得到Cookie的值, 不编码
*
* @param request
* @param cookieName
* @return
*/
public static String getCookieValue(HttpServletRequest request, String cookieName) {
return getCookieValue(request, cookieName, false);
}
/**
* 得到Cookie的值,
*
* @param request
* @param cookieName
* @return
*/
public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {
Cookie[] cookieList = request.getCookies();
if (cookieList == null || cookieName == null){
return null;
}
String retValue = null;
try {
for (int i = 0; i < cookieList.length; i++) {
if (cookieList[i].getName().equals(cookieName)) {
if (isDecoder) {
retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");
} else {
retValue = cookieList[i].getValue();
}
break;
}
}
} catch (UnsupportedEncodingException e) {
logger.error("Cookie Decode Error.", e);
}
return retValue;
}
/**
* 得到Cookie的值,
*
* @param request
* @param cookieName
* @return
*/
public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {
Cookie[] cookieList = request.getCookies();
if (cookieList == null || cookieName == null){
return null;
}
String retValue = null;
try {
for (int i = 0; i < cookieList.length; i++) {
if (cookieList[i].getName().equals(cookieName)) {
retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
break;
}
}
} catch (UnsupportedEncodingException e) {
logger.error("Cookie Decode Error.", e);
}
return retValue;
}
/**
* 生成cookie，并指定编码
* @param request 请求
* @param response 响应
* @param cookieName name
* @param cookieValue value
* @param encodeString 编码
*/
public static final void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, String encodeString) {
setCookie(request,response,cookieName,cookieValue,null,encodeString, null);
}
/**
* 生成cookie，并指定生存时间
* @param request 请求
* @param response 响应
* @param cookieName name
* @param cookieValue value
* @param cookieMaxAge 生存时间
*/
public static final void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, Integer cookieMaxAge) {
setCookie(request,response,cookieName,cookieValue,cookieMaxAge,null, null);
}
/**
* 设置cookie，不指定httpOnly属性
*/
public static final void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, Integer cookieMaxAge, String encodeString) {
setCookie(request,response,cookieName,cookieValue,cookieMaxAge,encodeString, null);
}
/**
* 设置Cookie的值，并使其在指定时间内生效
*
* @param cookieMaxAge
* cookie生效的最大秒数
*/
public static final void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, Integer cookieMaxAge, String encodeString, Boolean httpOnly) {
try {
if(StringUtils.isBlank(encodeString)) {
encodeString = "utf-8";
}
if (cookieValue == null) {
cookieValue = "";
} else {
cookieValue = URLEncoder.encode(cookieValue, encodeString);
}
Cookie cookie = new Cookie(cookieName, cookieValue);
if (cookieMaxAge != null && cookieMaxAge > 0)
cookie.setMaxAge(cookieMaxAge);
if (null != request)// 设置域名的cookie
cookie.setDomain(getDomainName(request));
cookie.setPath("/");
if(httpOnly != null) {
cookie.setHttpOnly(httpOnly);
}
response.addCookie(cookie);
} catch (Exception e) {
logger.error("Cookie Encode Error.", e);
}
}
/**
* 得到cookie的域名
*/
private static final String getDomainName(HttpServletRequest request) {
String domainName = null;
String serverName = request.getRequestURL().toString();
if (serverName == null || serverName.equals("")) {
domainName = "";
} else {
serverName = serverName.toLowerCase();
serverName = serverName.substring(7);
final int end = serverName.indexOf("/");
serverName = serverName.substring(0, end);
final String[] domains = serverName.split("\\.");
int len = domains.length;
if (len > 3) {
// www.xxx.com.cn
domainName = domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
} else if (len <= 3 && len > 1) {
// xxx.com or xxx.cn
domainName = domains[len - 2] + "." + domains[len - 1];
} else {
domainName = serverName;
}
}
if (domainName != null && domainName.indexOf(":") > 0) {
String[] ary = domainName.split("\\:");
domainName = ary[0];
}
return domainName;
}
}
4.1.5.配置过滤器
配置SpringMVC，使过滤器生效：
@Configuration
@EnableConfigurationProperties(JwtProperties.class)
public class MvcConfig implements WebMvcConfigurer {
@Autowired
private JwtProperties jwtProperties;
@Bean
public LoginInterceptor loginInterceptor() {
return new LoginInterceptor(jwtProperties);
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(loginInterceptor()).addPathPatterns("/**");
}
}