浏览器缓存

• Pragma、Expires、Cache-control
• Last-Modified
• Var

  • Cache-Control: no-cache, no-store, max-age=0, must-revalidate
    Vary: Accept-Encoding
    Vary: Origin
    Vary: Access-Control-Request-Method
    Vary: Access-Control-Request-Headers
    Vary: Origin
    Vary: Access-Control-Request-Method
    Vary: Access-Control-Request-Headers

• Via
• ETag
• AJAX