cors允许的方法和contype-type

https://fetch.spec.whatwg.org/#cors-safelisted-request-header

get

head

post

 

text/plain

multipart/form-data

application/x-www-form-urlencoded

 

• `Accept`
• `Accept-Language`
• `Content-Language`
• `Content-Type` and whose value, once extracted, has a MIME type (ignoring parameters) that is `application/x-www-form-urlencoded`, `multipart/form-data`, or `text/plain`

 

• `DPR`
• `Downlink`
• `Save-Data`
• `Viewport-Width`
• `Width`