iview axios 跨域配置问题

Question

在iview-cli中怎么解决，配置axios跨域问题，请说的的详细点

Answer 1

跨域需要后端的知识，在后端处理，现在只说后端：
（代码前面的也是代码组件部门）
一：写过滤器：
/**

• desc 自定义跨域过滤器
• className CorsFilter
• modify
• version 1.0
• since 1.8

*/
public class CorsFilter implements Filter {

private FilterConfig config = null;

@Override
public void init(FilterConfig config) throws ServletException {
    this.config = config;
}

@Override
public void destroy() {
    this.config = null;
}


@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    HttpServletResponse response = (HttpServletResponse) servletResponse;
    HttpServletRequest request = (HttpServletRequest) servletRequest;
    // 允许哪些Origin发起跨域请求,nginx下正常
    // response.setHeader( "Access-Control-Allow-Origin", config.getInitParameter( "AccessControlAllowOrigin" ) );
    response.setHeader( "Access-Control-Allow-Origin", "http://192.168.212.127:8070" );
    // 允许请求的方法
    response.setHeader( "Access-Control-Allow-Methods", "POST, GET, OPTIONS,DELETE,PUT" );
    // 多少秒内，不需要再发送预检验请求，可以缓存该结果
    response.setHeader( "Access-Control-Max-Age", "3600" );
    // 表明它允许跨域请求包含xxx头
    response.setHeader( "Access-Control-Allow-Headers", "Origin, Access-Token,X-Requested-With, Content-Type, Accept" );
    //是否允许浏览器携带用户身份信息（cookie）
    response.setHeader( "Access-Control-Allow-Credentials", "true" );

   // response.setHeader( "Access-Control-Expose-Headers", "*" );
    if (request.getMethod().equals( "OPTIONS" )) {
        response.setStatus( 200 );
        return;
    }
    filterChain.doFilter( servletRequest, response );
}

}

注意：http://192.168.212.127:8070，这个就是前面访问的地址

第二步：在web.xml中配置过滤器

<!-- CORS跨域过滤器 start -->
<filter>
    <filter-name>CorsFilter</filter-name>
    <filter-class>bd.store.base.cotroller.CorsFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>CorsFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
<!--# CORS跨域过滤器 end -->

第三步：前面直接使用，不需要做任何配置