摘要：
Nginx配置：header_filter_by_lua_filecros。lua；access_by_lua'ifngx.var.request_method==“OPTIONS”然后返回203end'；交叉lua:ifstring。find（ngx.var.http_origin，“：8008”）然后//判断originatingx。header[“访问
nginx 配置：
header_filter_by_lua_file cros.lua; access_by_lua ' if ngx.var.request_method == "OPTIONS"then return 203end ';
cros.lua:
if string.find(ngx.var.http_origin,":8008") then //判断request的origin ngx.header["Access-Control-Allow-Credentials"] = "true"ngx.header["Access-Control-Allow-Origin"] = ngx.var.http_origin ngx.header["Access-Control-Allow-Headers"] = "x-requested-with,content-type" if ngx.var.request_method == "OPTIONS" then ngx.header["Access-Control-Max-Age"] = "86400"ngx.header["Access-Control-Allow-Methods"] = "GET, POST, OPTIONS, DELETE"ngx.header["Content-Length"] = "0"ngx.header["Content-Type"] = "text/plain, charset=utf-8"end
end