javascript - IIS is executing request even if CORS is disabled -


i have 2 mvc asp.net applications. i'm trying make ajax post request 1 app another. default cors should have been disabled, , i'm getting alert in console:

xmlhttprequest cannot load http://localhost:2211/home/form. no 'access-control-allow-origin' header present on requested resource. origin 'http://localhost:2282' therefore not allowed access.

so should right. but...

i realized request executed specific action on http://localhost:2211. how possible? why request executed though cors had been disabled?

the request http://localhost:2211/home/form made, response request did not contain access-control-allow-origin header results in browser declining process response you.

until server responds request that's been made it, providing header, browser won't know if request was/is permitted or not, i.e. onus on browser react access-control-allow-origin header, rather server.

you may see different behaviours here depending on browser you're using as, example:

internet explorer not consider port when comparing origins.

docs.microsoft.com > "same origin"


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