跨域拦截Access-Control-Allow-Origin设置多个origin
2024-09-28 08:30:44
在Extjs和java项目碰到了需要同时处理跨域,外部要访问后台接口的问题
原来的代码是这样,只能设置一个extjs前台需要过滤的跨域请求
package com.xgt.config; import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set; /**
* 解决跨域问题
*/
public class SimpleCORSFilter implements Filter { public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res; response.setHeader("Access-Control-Allow-Origin", "http://127.0.0.1:1841");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "content-type, x-requested-with");
response.setHeader("Access-Control-Allow-Credentials", "true");
chain.doFilter(req, res);
} public void init(FilterConfig filterConfig) {} public void destroy() {} }
略微改进,给同局域网的同事访问我的接口,我设置的ip是同事的192.168.1.178,是因为他的ip访问我的接口会遭到拦截,我自己的ip不会被拦截,所以不用设置
package com.xgt.config; import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set; /**
* 解决跨域问题
*/
public class SimpleCORSFilter implements Filter { public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
String [] allowDomain= {"http://127.0.0.1:1841","http://192.168.1.178"};
Set<String> allowedOrigins= new HashSet<String>(Arrays.asList(allowDomain));
String originHeader=((HttpServletRequest) req).getHeader("Origin");
if (allowedOrigins.contains(originHeader)) {
response.setHeader("Access-Control-Allow-Origin", originHeader);
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "content-type, x-requested-with");
response.setHeader("Access-Control-Allow-Credentials", "true");
}
chain.doFilter(req, res);
} public void init(FilterConfig filterConfig) {} public void destroy() {} }
还有一种SB写法,直接根据originHeader的结果来判断,if语句简单粗暴
HttpServletResponse response = (HttpServletResponse) res;
String originHeader=((HttpServletRequest) req).getHeader("Origin");
if ("http://127.0.0.1:1841".equals(originHeader)) {
response.setHeader("Access-Control-Allow-Origin", "http://127.0.0.1:1841");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "content-type, x-requested-with");
response.setHeader("Access-Control-Allow-Credentials", "true");
}else if("http://192.168.1.178".equals(originHeader)){
response.setHeader("Access-Control-Allow-Origin", "http://192.168.1.178");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "content-type, x-requested-with");
response.setHeader("Access-Control-Allow-Credentials", "true");
}else if(originHeader==null){
chain.doFilter(req,res);
}
chain.doFilter(req, res);
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