解决跨域问题

佚名 6年前 (2019-05-13) 随笔 1741人围观抢沙发百度已收录

Access to XMLHttpRequest at 'http://127.0.0.1:8080/cas?service=http%3A%2F%2Flocalhost%3A8081%2Flogin%2F'
(redirected from 'http://localhost:8081/?_=1557728702859')
from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present
on the requested resource.

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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
         version="2.4">

    <display-name>CORS demo</display-name>
    
    <description>Simple CORS demo</description>
    
    <servlet>
        <!-- Some servlet -->
        <servlet-name>HelloWorld</servlet-name>
        <servlet-class>com.thetransactioncompany.cors.demo.HelloWorldServlet</servlet-class>
    </servlet>
    
    <servlet-mapping>
        <!-- Some servlet mapping -->
        <servlet-name>HelloWorld</servlet-name>
        <url-pattern>/cors-resource.html</url-pattern>
    </servlet-mapping>
    
    <filter>
        <!-- The CORS filter with parameters -->
        <filter-name>CORS</filter-name>
        <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
        
        <!-- Note: All parameters are options, if omitted the CORS 
             Filter will fall back to the respective default values.
          -->
        <init-param>
            <param-name>cors.allowGenericHttpRequests</param-name>
            <param-value>true</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.allowOrigin</param-name>
            <param-value>*</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.allowSubdomains</param-name>
            <param-value>false</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.supportedMethods</param-name>
            <param-value>GET, HEAD, POST, OPTIONS</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.supportedHeaders</param-name>
            <param-value>*</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.exposedHeaders</param-name>
            <param-value>X-Test-1, X-Test-2</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.supportsCredentials</param-name>
            <param-value>true</param-value>
        </init-param>
        
        <init-param>
            <param-name>cors.maxAge</param-name>
            <param-value>3600</param-value>
        </init-param>

    </filter>

    <filter-mapping>
        <!-- CORS Filter mapping -->
        <filter-name>CORS</filter-name>
        <url-pattern>/cors-resource.html</url-pattern>
    </filter-mapping>

</web-app>