Springmvc跨域过滤器

Lockie921

已于 2023-06-02 11:26:14 修改

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CC 4.0 BY-SA版权

文章标签： SpringMVC java 过滤器

于 2020-07-06 15:16:05 首次发布

本文链接：https://blog.youkuaiyun.com/FalseLin/article/details/107159610

本文介绍了一种通过实现HeaderFilter来解决跨域资源共享（CORS）问题的方法。该Filter能够为HTTP响应添加必要的Access-Control-*头信息，允许指定来源进行跨域请求，并设置请求方法、凭证等权限。

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Filter代码：

package com.interceptor;

import java.io.IOException;

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;


/**
 * header过滤器
 * @ClassName HeaderFilter
 * @Description TODO
 * @Author lockie
 * @Date 2020/6/22 21:55
 * @Version 1.0
 */
public class HeaderFilter implements Filter{

    public void destroy() {

    }

    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;
        String originHeader = request.getHeader("Origin");
        response.setHeader("Access-Control-Allow-Origin", originHeader);
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "0");
        response.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, " +
                "If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With," +
                "uid, access_token");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("XDomainRequestAllowed","1");
        chain.doFilter(request, response);
    }

    public void init(FilterConfig arg0) throws ServletException {

    }
}

web.xml配置，替换自己过滤器的全限定名

<filter>
    <filter-name>header</filter-name>
    <filter-class>com.interceptor.HeaderFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>header</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>