Question

如何让服务器支持跨域

Answer 1

如果服务器是apache

(1)修改http服务的配置文件:C:\wamp\bin\apache\Apache2.4.4\conf\httpd.conf

把LoadModule headers_module modules/mod_headers.so 前面的注释删除.

(2)添加Header set Access-Control-Allow-Origin *

<Directory />

    AllowOverride none

    Require all granted

         Header set Access-Control-Allow-Origin *

</Directory>

(3)重启http服务

如果是tomcat,比如spring MVC项目

创建一个过滤器,代码如下:

package com.web.filter;  

  

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.HttpServletResponse;  

  

import com.common.dict.Constant2;  

  

import oa.service.DictionaryParam;  

  

public class SimpleCORSFilter implements Filter{  

  

    @Override  

    public void destroy() {  

          

    }  

  

    @Override  

    public void doFilter(ServletRequest req, ServletResponse res,  

            FilterChain chain) throws IOException, ServletException {  

            HttpServletResponse response = (HttpServletResponse) res;  

            response.setHeader("Access-Control-Allow-Origin", DictionaryParam.get(Constant2.DICTIONARY_GROUP_GLOBAL_SETTING, "AccessControlAllowOrigin"));  

            response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");  

            response.setHeader("Access-Control-Max-Age", "3600");  

            response.setHeader("Access-Control-Allow-Headers", "x-requested-with");  

            chain.doFilter(req, res);  

          

    }  

  

    @Override  

    public void init(FilterConfig arg0) throws ServletException {  

          

    }  

  

}  

关键代码:response.setHeader("Access-Control-Allow-Origin", "*");

 修改web.xml,增加:

<filter>  

      <filter-name>cors</filter-name>  

      <filter-class>com.web.filter.SimpleCORSFilter</filter-class>  

    </filter>  

    <filter-mapping>  

      <filter-name>cors</filter-name>  

      <url-pattern>/*</url-pattern>  

    </filter-mapping>  

这样服务器就支持ajax的跨域访问了