does the activity of cors plugin implements on httpserver side

[troyqu]

i`m using apisix cors plugin with apisix3.8 version. i found in my test.

• if i check the cors configuration in a curl command with -H 'Origin:xxx', i can not trigger the cors error.
• if i trigger the cors request in brower, like this Does apisix cors plugin working normal #11218 , i can see the cors error on brower window.

that got my thinking, seems apisix cors plugin implementation not on http server side. because if i writer a http request and config the cors configuration on server side. such as springsecurity cors setting.

even i use curl command with -H 'Origin', i can see the request failed in curl output, but apisix cors plugin will pass the request and return the request reponse.

can anyone know the detail of apisix cors working principle, answer the question of this scenario.

[troyqu]

as the result of my test, i think apisix cors plugin implementation CORS request Header not in httpserver side. just as the middle-ware process http request.