CORS settings for IIS 7.5

Question

Could someone please help me, convert the following code for use in the web.config in IIS 7.5 and where in the web.config file I should place each piece of code?

# Always set these headers.
Header always set Access-Control-Allow-Origin "*"
Header always set Access-Control-Allow-Methods "POST, GET, OPTIONS, DELETE, PUT"
Header always set Access-Control-Max-Age "1000"
Header always set Access-Control-Allow-Headers "x-requested-with, Content-Type, origin, authorization, accept, client-security-token"

# Added a rewrite to respond with a 200 SUCCESS on every OPTIONS request.
RewriteEngine On
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteRule ^(.*)$ $1 [R=200,L]

Answer 1

Some updates needs to be considered as Chrome now adds strict-origin-when-cross-origin as default referrer-policy, so if you don't set a referrer policy in the web.config, you might still run into the CORS issue. This is the setting worked for me when testing a localhost test program against a remote server (the settings are not recommended for production):

<system.webServer>
   <httpProtocol>
     <customHeaders>
         <add name="Referrer-Policy" value="no-referrer" />
         <add name="Access-Control-Allow-Origin" value="*" />
         <add name="Access-Control-Allow-Methods" value="GET, PUT, POST, DELETE, HEAD, OPTIONS" />
         <add name="Access-Control-Allow-Credentials" value="true"/>
         <add name="Access-Control-Allow-Headers" value="X-Requested-With, origin, content-type, accept" />
     </customHeaders>
   </httpProtocol>
</system.webServer>