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
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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
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@WebFilter(urlPatterns = { “/api/*” }, filterName = “tokenAuthorFilter”) |
硬编码注册filter
在application.java中加入如下代码
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//注册filter@Beanpublic 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
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//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
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/********** * 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 * */@Configurationpublic 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("*"); // 1 corsConfiguration.addAllowedHeader("*"); // 2 corsConfiguration.addAllowedMethod("*"); // 3 return corsConfiguration; } @Bean public CorsFilter corsFilter() { UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); source.registerCorsConfiguration("/**", buildConfig()); // 4 return new CorsFilter(source); } } |
springboot配置Filter & 允许跨域请求
1.filter类
加注解：
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@WebFilter(filterName = "authFilter", urlPatterns = "/*") |
代码如下：
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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：
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@ServletComponentScan(basePackages = {"com.activiti.filter"}) |
代码如下：
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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：
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<!DOCTYPE html><html><head> <meta charset="utf-8"></head><body><div id="app"><hr><h2>模型列表</h2><a href="#" 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="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >编辑</a> <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >发布</a> <a href="#" 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> |
大功告成 回家睡觉 嘻嘻嘻~
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/zjcjava/article/details/78237164
