设置Access-Control-Allow-Origin
打开IIS，找到“HTTP响应标头”点进去，
在右侧可以看到添加，然后添加如下标头即可
Access-Control-Allow-Headers：Content-Type, api_key, Authorization
Access-Control-Allow-Origin：*
<system.webServer>
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET"/>
<add name="Access-Control-Allow-Headers" value="x-requested-with,Content-Type"/>
<add name="Access-Control-Allow-Origin" value="*" />
</customHeaders>
</httpProtocol>
</system.webServer>