什么是Api接口幂等？
简单来说Api接口幂等在有限的时间内限制接口访问请求，限制ip访问次数，不限制平台访问，都可以拿到数据。一个接口不可以重复表单提交，生产一次消费一次。
用户场景：同一时间重复提交多次请求。
什么是数据篡改？
api接口数据篡改，脚本文件，篡改接口参数进行服务器数据窃取，严重的数据篡改会导致数据库宕机，程序软件崩溃。
想到这里都知道后台api接口幂等多重要了吧。今天给大家讲非对称加密实现后台接口api幂等。
实现思路：jtw+ 验证标识+签名密钥+当前时间戳+存放过期时间+AES 实现加密算法token。
实现步骤：1，用户登录成功后，生产加密token存放redis.
2,下次登录检验token 是否过期，过期请重新登录。
3，用户登录存在有效期，不需要登录。（这里就是单点登录方式）
code核心实现类：
import io.jsonwebtoken.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import javax.annotation.PostConstruct;
import javax.servlet.http.HttpServletRequest;
import java.util.*;
import java.util.stream.Collectors;
@Component
public class JWTTokenUtils {
public static final String AUTHORIZATION_HEADER = \"x-token\";
public static final String AUTHORIZATION_TOKEN = \"x-token\";
private final Logger logger = LoggerFactory.getLogger(JWTTokenUtils.class);
private static final String AUTHORITIES_KEY = \"auth\";
private String secretKey; // 签名密钥
private long tokenValidityInMilliseconds; // 失效日期
private long tokenValidityInMillisecondsForRememberMe; // （记住我）失效日期
@PostConstruct
public void init() {
this.secretKey = \"isoftstone.huwei\";
int secondIn1day = 1000 * 60 * 60 * 24;
this.tokenValidityInMilliseconds = secondIn1day * 2L;
this.tokenValidityInMillisecondsForRememberMe = secondIn1day * 7L;
}
// 创建Token
public String createToken(Authentication authentication, Boolean rememberMe) {
String authorities = authentication.getAuthorities().stream() // 获取用户的权限字符串，如 USER,ADMIN
.map(GrantedAuthority::getAuthority).collect(Collectors.joining(\",\"));
long now = (new Date()).getTime(); // 获取当前时间戳
Date validity; // 存放过期时间
if (rememberMe) {
validity = new Date(now + this.tokenValidityInMilliseconds);
} else {
validity = new Date(now + this.tokenValidityInMillisecondsForRememberMe);
}
return SysConst.SYS_COMPANY_HEAD+\".\"+ Jwts.builder() // 创建Token令牌
.setSubject(authentication.getName()) // 设置面向用户
.claim(AUTHORITIES_KEY, authorities) // 添加权限属性
.setExpiration(validity) // 设置失效时间
.signWith(SignatureAlgorithm.HS512, secretKey) // 生成签名
.compact();
}
// 获取用户权限
public Authentication getAuthentication(String token) {
logger.info(\"JWTTokenUtils Start Get User Auth\");
// 解析Token的payload
Claims claims = Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token).getBody();
Collection<? extends GrantedAuthority> authorities = Arrays
.stream(claims.get(AUTHORITIES_KEY).toString().split(\",\")) // 获取用户权限字符串
.map(SimpleGrantedAuthority::new).collect(Collectors.toList()); // 将元素转换为GrantedAuthority接口集合
User principal = new User(claims.getSubject(), \"\", authorities);
return new UsernamePasswordAuthenticationToken(principal, null, authorities);
}
/**
* 解析token获取用户编码
* @param token
* @return
*/
public String getAuthSubject(String token) {
Claims claims = Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token).getBody();
return claims.getSubject();
}
public String resolveToken(HttpServletRequest request){
String bearerToken = request.getHeader(AUTHORIZATION_HEADER); //从HTTP头部获取TOKEN
if (StringUtils.hasText(bearerToken) && bearerToken.startsWith(SysConst.SYS_COMPANY_HEAD)){
return bearerToken.substring(bearerToken.indexOf(\".\")+1, bearerToken.length()); //返回Token字符串，去除Bearer
}
String jwt = request.getParameter(AUTHORIZATION_TOKEN); //从请求参数中获取TOKEN
if (StringUtils.hasText(jwt) && jwt.startsWith(SysConst.SYS_COMPANY_HEAD)) {
return jwt.substring(bearerToken.indexOf(\".\")+1, jwt.length());
}
return null;
}
// 验证Token是否正确
public boolean validateToken(String token) {
try {
Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token); // 通过密钥验证Token
return true;
} catch (MalformedJwtException e) { // JWT格式错误
logger.info(\"Invalid JWT token.\");
logger.trace(\"Invalid JWT token trace: {}\", e);
} catch (ExpiredJwtException e) { // JWT过期
logger.info(\"Expired JWT token.\");
logger.trace(\"Expired JWT token trace: {}\", e);
} catch (UnsupportedJwtException e) { // 不支持该JWT
logger.info(\"Unsupported JWT token.\");
logger.trace(\"Unsupported JWT token trace: {}\", e);
} catch (IllegalArgumentException e) { // 参数错误异常
logger.info(\"JWT token compact of handler are invalid.\");
logger.trace(\"JWT token compact of handler are invalid trace: {}\", e);
}catch (SignatureException e) { // 签名异常
logger.info(\"Invalid JWT signature.\");
logger.trace(\"Invalid JWT signature trace: {}\", e);
}
return false;
}
}
redis写入缓存：
RedisModel model = new RedisModel();
model.setModelName(token);
model.setModelKey(\"userInfo\");
Map<String,Object> params = new HashMap<String,Object>();
params.put(\"userName\", customerDto.getUsername());
CustomerVo customerVo = new CustomerVo();
customerVo.setEmail(customerDto.getEmail());
customerVo.setPhone(customerDto.getPhone());
CustomerVo userInfo = customerService.queryUserByUserName(customerVo);
Map<String,Object> userToken = new HashMap<String,Object>();
userToken.put(\"userToken\", token);
userToken.put(\"userInfo\", userInfo);
model.setModelData(userToken);
model.setTimeoutType(\"M\");
model.setTimeout(redisTokenTimeOut);
resultMap.setCode(CommonResultStatus.SUCCESS.getCode());
resultMap.setMessage(CommonResultStatus.SUCCESS.getMessage());
//写入为hash实体
redisTemplate.opsForHash().put(model.getModelName(), model.getModelKey(), model.getModelData());
redisTemplate.expire(model.getModelName(), model.getTimeout(), TimeUnit.MINUTES);@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
public static final String AUTHORIZATION_HEADER = \"x-token\";//Authorization
//允许访问的路径
private static final String[] AUTH_WITHOUTLIST = {
// -- swagger ui
\"/v2/api-docs\", \"/swagger-resources\", \"/swagger-resources/**\", \"/configuration/ui\",
\"/configuration/security\", \"/swagger-ui.html\", \"/webjars/**\",
// other public endpoints of your API may be appended to this array
\"/druid/**\",\"/health\",\"/info\",\"/info/**\",//druid sql 监听
\"/hystrix\",\"/hystrix/**\",\"/error\",\"/loggers\",\"/loggers/**\",
\"/service-registry/instance-status\",\"/hystrix.stream\",\"/turbine/**\",\"/turbine.stream\",
\"/autoconfig\",\"/archaius\",\"/beans\",\"/features\",\"/configprops\",\"/mappings\",\"/auditevents\",
\"/env\",\"/env/**\",\"/metrics\",\"/metrics/**\",\"/trace\",\"/trace/**\", \"/dump\",\"/dump/**\", \"/jolokia/**\",
\"/info/**\",\"/activiti/**\", \"/logfile/**\", \"/refresh\",\"/flyway/**\", \"/liquibase/**\",\"/heapdump\",\"/heapdump/**\",
\"/v1/authcenter/login\",\"/v1/authcenter/fiberhomeLogin\",\"/v1/authcenter/registered\",//登录URL
\"/v1/authcenter/queryAuthInfo\",//鉴权URL
\"/u/sms/sendPhone\",\"/citry/getChineseProvinces\",\"/code/getCaptchaImage\",\"/u/sms/forgetEmailPwd\",
\"/u/sms/sendEmail\",\"/citry/getOtherCoutryList\",\"/upload/pngDir/*\",\"/job/getJobList\",\"/u/sms/sendLoginEmail\",
\"/v1/authcenter/queryUserInfoByMap\",\"/v1/authcenter/forgetPwd\",
\"/diagram-viwmer/**\",\"/editor-marketing/**\",
\"/modeler.html\",
\"/actuator/health\"
};
@Autowired
private SecurityUserDetailsService securityUserDetailsService;
@Autowired
private AuthLogoutSuccessHandler authLogoutSuccessHandler;
@Autowired
private JWTTokenUtils tokenProvider;
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
//自定义获取用户信息设置密码加密 和默认用DaoAuthenticationProvider加密任选
auth.userDetailsService(securityUserDetailsService).passwordEncoder(passwordEncoder());
}
@Override
protected void configure(HttpSecurity http) throws Exception {
// 配置请求访问策略
// 关闭CSRF、CORS
http.cors().disable().csrf().disable()
// 由于使用Token，所以不需要Session
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
// 验证Http请求
.authorizeRequests()
// 允许所有用户访问首页 与 登录
.antMatchers(AUTH_WITHOUTLIST).permitAll()
// 其它任何请求都要经过认证通过
.anyRequest().authenticated().and()
// 用户页面需要用户权限
// 设置登出
.logout().logoutSuccessHandler(authLogoutSuccessHandler).permitAll();
// 添加JWT filter 在
http.addFilterBefore(new JwtAuthenticationTokenFilter(tokenProvider), UsernamePasswordAuthenticationFilter.class);
}
//判断是否有权限分三步
后台security 已经对地址做了拦截了，请求头必须设置请求参数参数
1：判断token是否存在（security 已实现）
2：token是否有效（基于redis）
3:访问API是否有权限
缓存结构：
[
\"java.util.HashMap\",
{
\"userToken\": \"ISOFTSTONE.eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiI0MmRkMGJlZmQwNDg0MmMyODhiN2QxZjVkYTcwMWNjNiIsImF1dGgiOiJ1c2VyIiwiZXhwIjoxNjM1MjMyMzk4fQ.9VqMD0vyu-pe42moNd1QeNWP4KrBvvNYJKDQdQPDi_YKKXPG3l90dNn5wgK2rZXs471Pmeby-BdHPHd2-iNKfA\",
\"userInfo\": [
\"com.common.vo.CustomerVo\",
{
\"id\": \"42dd0befd04842c288b7d1f5da701cc6\",
\"createTime\": [
\"java.util.Date\",
\"2021-06-10\"
],
\"updateTime\": [
\"java.util.Date\",
\"2021-06-10\"
],
\"deleted\": 0,
\"phone\": \"13797004616\",
\"password\": \"123456\",
\"email\": \"sunlin@fiberhome.com\",
\"status\": \"3\",
\"isEnable\": \"1\",
\"userType\": \"1\",
\"roleId\": null,
\"country\": null,
\"provinces\": null,
\"company\": null,
\"jobs\": null,
\"realName\": \"孙\",
\"fiberhomeEmail\": null,
\"department\": null,
\"registerWay\": null,
\"onlineTime\": null,
\"expireDate\": null,
\"registerIp\": null,
\"language\": null,
\"equipmentType\": null,
\"accountType\": null,
\"platformType\": null,
\"companyType\": null,
\"userdesc\": null,
\"userid\": \"0210990342\",
\"typeConfig\": null,
\"isActive\": \"1\",
\"postname\": \"副总经理\",
\"did1\": \"701387\",
\"dname1\": \"财务管理部\",
\"did2\": null,
\"dname2\": null,
\"did3\": null,
\"dname3\": null,
\"did4\": null,
\"dname4\": null,
\"postid\": \"803711\"
}
]
}
]接口实现返回：
x-token:ISOFTSTONE.eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiI0MmRkMGJlZmQwNDg0MmMyODhiN2QxZjVkYTcwMWNjNiIsImF1dGgiOiJ1c2VyIiwiZXhwIjoxNjM1MjMyNTMzfQ.4QzaY_ln-EVukG6Hnbx-mRl2nUB0Eu6jJxIN0KHigzLfqZH7aXt1aId0RhRvS-o5Vf7cVp5jd9cqpkQwfp724A
请求其他接口访问，加入到请求头Headers里面即可。我们的api接口幂等就实现完成了。
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