VUE的axios连接ASP.NET后台跨域问题

若不需要使参数带session信息，vue中设置withCredentials为false

Axios.defaults.withCredentials = true;

ASP中设置web.config的 <system.webServer>节点，

<system.webServer>

 <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET"/>
        <add name="Access-Control-Allow-Headers" value="accept,x-requested-with,content-type"/>
        <add name="Access-Control-Allow-Origin" value="*"/> //这里设置*就可以
        <add name="Access-Control-Allow-Credentials" value="true"/>
      </customHeaders>
    </httpProtocol>

</system.webServer>

若要使用withCredentials=true，则需要修改Access-Control-Allow-Origin的值为具体的请求域名

<add name="Access-Control-Allow-Origin" value="http://localhost:8080"/> //本地调试的vue地址