When J2EE uses a web player, pay attention to the header information in response to the browser

     

    When J2EE uses the web player, pay attention to the header information responded to the browser, otherwise the web player will not have a progress control bar.

    

1. Accept-Ranges:
   bytes
2. Access-Control-Allow-Headers:
   range, accept-encoding
3. Access-Control-Allow-Origin:
   *
4. Content-Length: xxx