JS Requesting resources from external servers across domains
- 2021-07-16 01:41:28
- OfStack
When the interface provided by tomcat server cannot be accessed in other domains, Access-Control-Allow-Origin should be added: *
The following actions are set in the project to be accessed
1. Write interceptor code
package com.soft.filter;
/**
* Created by Administrator on 2017/2/6.
*/
import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class CORSFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
httpResponse.addHeader("Access-Control-Allow-Origin", "*");
filterChain.doFilter(servletRequest, servletResponse);
}
@Override
public void destroy() {
}
}
2. Configure web. xml
<filter>
<filter-name>CorsFilter</filter-name>
<filter-class>com.omiaozu.manager.filter.CORSFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CorsFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>