存在基于Origin标头的#CORS和OPTIONS方法以及Access-Control-Request-Method

Question

基于Origin标头的CORS和OPTIONS方法以及Access-Control-Request-Method存在 从Origin标头设置一个env变量，然后使用它发送200个响应的响应标头 当前浏览器将请求标头设置为null，使用下面的代码后看不到所有响应标头，请问哪里出了错？

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RewriteCond %{HTTP:Origin} "^http(s)?://(.+\.)?(abc\.com)$" [OR]
RewriteCond %{HTTP:Origin} "^null$"
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteCond %{HTTP:Access-Control-Request-Method} ^.+$
RewriteRule ^(.*)$ $1 [R=200,L,E=origin_is:%{HTTP:Origin}]
Header always set Access-Control-Allow-Origin %{origin_is}e env=origin_is
Header always set Access-Control-Allow-Methods %{Access-Control-Request-Method}e env=origin_is
Header always set Access-Control-Max-Age "1000" env=origin_is
Header always set Access-Control-Allow-Headers %{Access-Control-Request-Headers}e env=origin_is
Header merge  Vary "Origin" env=origin_is

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