spring boot配合前端实现跨域请求访问
发布时间:2020-12-14 19:59:52 所属栏目:Java 来源:网络整理
导读:一.方法: 服务端设置Respone Header头中Access-Control-Allow-Origin 配合前台使用jsonp 继承WebMvcConfigurerAdapter 添加配置类 二.实例: 1.前端:因为我们用了前后端分离,前端用node服务器,node服务器再用了ajax反向代理请求到我的spring boot 服务器。其
一.方法:
二.实例: 1.前端:因为我们用了前后端分离,前端用node服务器,node服务器再用了ajax反向代理请求到我的spring boot 服务器。其中node服务器也用了ajax发出请求所以也存在跨域的问题。具体代码: app.all(apiRoot + '/*',proxy('127.0.0.1:' + proxyPort,{ forwardPath: function(req,res) { console.log('req: ',req,'res; ',res); return require('url').parse(req.url).path; } })); 后台(用的是spring boot 1.3.7.RELEASE) :用了一个filter进行了身份验证同时进行了跨域处理,具体代码: public class AuthFilter implements Filter { // @Autowired //这个不能自动注入servlet和filter是被tomcat管理的 private BaseUserService baseUserService; private String[] excludePaths; @Override public void init(FilterConfig filterConfig) throws ServletException { System.out.println("initFilter"); //不能在初始化中通过Appliaction Context获取因为这时候还没初始化Application Context //baseUserService = SpringUtils.getBean("baseUserService",BaseUserService.class); excludePaths = new String[]{"/api/user/noLogin","/api/user/tokenError","/api/user/loginForeground","/api/user/loginBackground","/api/user/inCorrectUserId"}; } @Override public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException,ServletException { HttpServletRequest httpServletRequest = (HttpServletRequest) request; HttpServletResponse httpServletResponse = (HttpServletResponse) response; //这里填写你允许进行跨域的主机ip httpServletResponse.setHeader("Access-Control-Allow-Origin","*"); //允许的访问方法 httpServletResponse.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 httpServletResponse.setHeader("Access-Control-Max-Age","3600"); httpServletResponse.setHeader("Access-Control-Allow-Headers","Origin,X-Requested-With,Content-Type,Accept"); String userId = request.getParameter("userId"); String token = request.getParameter("token"); //有token的 ` if (userId != null && token != null) { try { Integer id = Integer.parseInt(userId); if (baseUserService == null) baseUserService = SpringUtils.getBean("baseUserService",BaseUserService.class); int status = baseUserService.checkLogin(id,token); if (status == 1) { chain.doFilter(request,response); } else if (status == 0) { httpServletResponse.sendRedirect("/api/user/tokenError"); } else if (status == -2) { httpServletResponse.sendRedirect("/api/user/inCorrectUserId"); } else { httpServletResponse.sendRedirect("/api/user/noLogin"); } } catch (NumberFormatException exception) { httpServletResponse.sendRedirect("/api/user/inCorrectUserId"); } } else { String path = httpServletRequest.getServletPath(); if (excludePath(path)) { chain.doFilter(request,response); } else { httpServletRequest.getRequestDispatcher("/api/user/noLogin").forward(request,response); } } // ((HttpServletResponse) response).addHeader("Access-Control-Allow-Origin","*"); // CorsFilter corsFilter=new CorsFilter(); } private boolean excludePath(String path) { for (int i = 0; i < excludePaths.length; i++) { if (path.equals(excludePaths[i])) return true; } return false; } @Override public void destroy() { System.out.println("destroy method"); } } 这种方法还适用于servlet中,特别注意的是一定要在filter动作之前加上这句话,也就是在代码的最前面加上这个话。 跨域资源共享 CORS 详解(相关链接) 2.详细请看(点开) package edu.ecnu.yjsy.conf; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.CorsRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; @Configuration public class CorsConfig extends WebMvcConfigurerAdapter { @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping("/**") .allowedOrigins("*") .allowCredentials(true) .allowedMethods("GET","POST","DELETE","PUT") .maxAge(3600); } } 这里有个坑spring boot 以前的版本这样设置可以用但是 我用的1.3.7.RELEASE spring boot 不能用,所以用第二种方式是万能的 以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程小技巧。 您可能感兴趣的文章:
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