Springboot 如何实现filter拦截token验证和跨域

Springboot filter拦截token验证和跨域背景

web验证授权合法的一般分为下面几种

使用session作为验证合法用户访问的验证方式 使用自己实现的token 使用OCA标准

在使用API接口授权验证时，token是自定义的方式实现起来不需要引入其他东西，关键是简单实用。

合法登陆后一般使用用户UID+盐值+时间戳使用多层对称加密生成token并放入分布式缓存中设置固定的过期时间长（和session的方式有些相同），这样当用户访问时使用token可以解密获取它的UID并据此验证其是否是合法的用户。

#springboot中实现filter

一种是注解filter 一种是显示的硬编码注册filter

先有filter

import javax.servlet.annotation.WebFilter;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.stereotype.Component;import springfox.documentation.spring.web.json.Json;import com.alibaba.fastjson.JSON; import java.io.IOException;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.io.UnsupportedEncodingException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/*************** * token验证拦截 * @author bamboo zjcjava@163.com * @time 2017-08-01 */@Component//@WebFilter(urlPatterns = { '/api/v/*' }, filterName = 'tokenAuthorFilter')public class TokenAuthorFilter implements Filter { private static Logger logger = LoggerFactory .getLogger(TokenAuthorFilter.class); @Override public void destroy() { } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest req = (HttpServletRequest) request; HttpServletResponse rep = (HttpServletResponse) response; //设置允许跨域的配置 // 这里填写你允许进行跨域的主机ip（正式上线时可以动态配置具体允许的域名和IP） rep.setHeader('Access-Control-Allow-Origin', '*'); // 允许的访问方法 rep.setHeader('Access-Control-Allow-Methods','POST, GET, PUT, OPTIONS, DELETE, PATCH'); // Access-Control-Max-Age 用于 CORS 相关配置的缓存 rep.setHeader('Access-Control-Max-Age', '3600'); rep.setHeader('Access-Control-Allow-Headers','token,Origin, X-Requested-With, Content-Type, Accept'); response.setCharacterEncoding('UTF-8'); response.setContentType('application/json; charset=utf-8'); String token = req.getHeader('token');//header方式 ResultInfo resultInfo = new ResultInfo(); boolean isFilter = false; String method = ((HttpServletRequest) request).getMethod(); if (method.equals('OPTIONS')) { rep.setStatus(HttpServletResponse.SC_OK); }else{ if (null == token || token.isEmpty()) { resultInfo.setCode(Constant.UN_AUTHORIZED); resultInfo.setMsg('用户授权认证没有通过!客户端请求参数中无token信息'); } else { if (TokenUtil.volidateToken(token)) { resultInfo.setCode(Constant.SUCCESS); resultInfo.setMsg('用户授权认证通过!'); isFilter = true; } else { resultInfo.setCode(Constant.UN_AUTHORIZED); resultInfo.setMsg('用户授权认证没有通过!客户端请求参数token信息无效'); } } if (resultInfo.getCode() == Constant.UN_AUTHORIZED) {// 验证失败 PrintWriter writer = null; OutputStreamWriter osw = null; try { osw = new OutputStreamWriter(response.getOutputStream(), 'UTF-8'); writer = new PrintWriter(osw, true); String jsonStr = JSON.toJSONString(resultInfo); writer.write(jsonStr); writer.flush(); writer.close(); osw.close(); } catch (UnsupportedEncodingException e) { logger.error('过滤器返回信息失败:' + e.getMessage(), e); } catch (IOException e) { logger.error('过滤器返回信息失败:' + e.getMessage(), e); } finally { if (null != writer) { writer.close(); } if (null != osw) { osw.close(); } } return; } if (isFilter) { logger.info('token filter过滤ok!'); chain.doFilter(request, response); } } } @Override public void init(FilterConfig arg0) throws ServletException { }}注解配置filter

加上如下配置则启动时会根据注解加载此filter

@WebFilter(urlPatterns = { “/api/*” }, filterName = “tokenAuthorFilter”)硬编码注册filter

在application.java中加入如下代码

//注册filter @Bean public FilterRegistrationBean filterRegistrationBean() { FilterRegistrationBean registrationBean = new FilterRegistrationBean(); TokenAuthorFilter tokenAuthorFilter = new TokenAuthorFilter(); registrationBean.setFilter(tokenAuthorFilter); List<String> urlPatterns = new ArrayList<String>(); urlPatterns.add('/api/*');registrationBean.setUrlPatterns(urlPatterns); return registrationBean; }

以上两种方式都可以实现filter

跨域说明

springboot可以设置全局跨域，但是对于filter中的拦截地址并不其中作用，因此需要在dofilter中再次设置一次

区局设置跨域方式如下

方式1.在application.java中加入如下代码

//跨域设置 private CorsConfiguration buildConfig() { CorsConfiguration corsConfiguration = new CorsConfiguration(); corsConfiguration.addAllowedOrigin('*'); corsConfiguration.addAllowedHeader('*'); corsConfiguration.addAllowedMethod('*'); return corsConfiguration; } /** * 跨域过滤器 * @return */ @Bean public CorsFilter corsFilter() { UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); source.registerCorsConfiguration('/**', buildConfig()); // 4 return new CorsFilter(source); } 方式2.配置注解

必须集成WebMvcConfigurerAdapter类

/********** * 跨域 CORS:使用 方法3 * 方法: 1服务端设置Respone Header头中Access-Control-Allow-Origin 2配合前台使用jsonp 3继承WebMvcConfigurerAdapter 添加配置类 http://blog.csdn.net/hanghangde/article/details/53946366 * @author xialeme * */@Configuration public class CorsConfig extends WebMvcConfigurerAdapter{ /* @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping('/**') .allowedOrigins('*') .allowCredentials(true) .allowedMethods('GET', 'POST', 'DELETE', 'PUT') .maxAge(3600); } */ private CorsConfiguration buildConfig() {CorsConfiguration corsConfiguration = new CorsConfiguration();corsConfiguration.addAllowedOrigin('*'); // 1corsConfiguration.addAllowedHeader('*'); // 2corsConfiguration.addAllowedMethod('*'); // 3return corsConfiguration; } @Bean public CorsFilter corsFilter() {UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();source.registerCorsConfiguration('/**', buildConfig()); // 4return new CorsFilter(source); } } springboot配置Filter & 允许跨域请求1.filter类

加注解：

@WebFilter(filterName = 'authFilter', urlPatterns = '/*')

代码如下：

package com.activiti.filter; import javax.servlet.*;import javax.servlet.annotation.WebFilter;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException; // renwenqiang@WebFilter(filterName = 'authFilter', urlPatterns = '/*')public class SystemFilter implements Filter { public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {HttpServletRequest request = (HttpServletRequest) servletRequest;HttpServletResponse response = (HttpServletResponse) servletResponse;response.setHeader('Access-Control-Allow-Origin','*');System.out.println(request.getRequestURL());filterChain.doFilter(request, servletResponse); } @Override public void destroy() { } @Override public void init(FilterConfig arg0) throws ServletException { }}2.启动类

加注解：

@ServletComponentScan(basePackages = {'com.activiti.filter'})

代码如下：

package com; import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.web.servlet.ServletComponentScan;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.ComponentScan;import org.springframework.orm.jpa.vendor.HibernateJpaSessionFactoryBean;import org.springframework.scheduling.annotation.EnableScheduling; @SpringBootApplication(exclude = {org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration.class,org.activiti.spring.boot.SecurityAutoConfiguration.class })@ServletComponentScan(basePackages = {'com.activiti.filter'})public class DemoActiviti0108Application {@Bean public HibernateJpaSessionFactoryBean sessionFactory() {return new HibernateJpaSessionFactoryBean(); } public static void main(String[] args) {SpringApplication.run(DemoActiviti0108Application.class, args); } }3.jquery ajax请求代码实例：

<!DOCTYPE html><html><head> <meta charset='utf-8'></head><body><div id='app'><hr><h2>模型列表</h2><a href='https://www.haobala.com/bcjs/12861.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' id='huizhi'>绘制流程</a><hr><table border='1'> <tr><td>id</td><td>deploymentId</td><td>name</td><td>category</td><td>optional</td> </tr> <tr v-for='item in models'><td>{{ item.id }}</td><td>{{ item.deploymentId }}</td><td>{{ item.name }}</td><td>{{ item.category }}</td><td> <a href='https://www.haobala.com/bcjs/12861.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >编辑</a>&nbsp;&nbsp; <a href='https://www.haobala.com/bcjs/12861.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >发布</a>&nbsp;&nbsp; <a href='https://www.haobala.com/bcjs/12861.html#' rel='external nofollow' rel='external nofollow' rel='external nofollow' rel='external nofollow' >删除</a></td> </tr></table></div> <script src='https://cdn.bootcss.com/jquery/2.2.2/jquery.js'></script> <script src='https://cdn.bootcss.com/vue/2.6.10/vue.js'></script> <script> new Vue({ el: ’#app’, data: {models: [] }, created: function () {$.ajax({ type: ’GET’, url: ’http://localhost:8081/activiti/model/all’, beforeSend: function() {console.log(’beforeSend’); }, data:{}, dataType: 'json', xhrFields: {withCredentials: false }, crossDomain: true, async: true, //jsonpCallback: 'jsonpCallback',//服务端用于接收callback调用的function名的参数 }).done((data) => { console.log(’done’); console.log(data); this.models = data;}).fail((error) => { console.log(’fail’); console.log(’error’);}); } }) </script> </body></html>

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