lua set_cookie修改，解决跨域时浏览器不会自动带上cookie问题

服务器响应

相应头中存在set_cookie头
如下：set_cookie=“dboneSess=1c4453c01b6548eeb0fc8d24baa6be4d; path=/; httponly; secure; SameSite=Strict; httponly”
set_cookie= “dboneSess.sig=IrUu8wLaEdjtiGw_mB4tPkEn6l2i2Y4eVX894jmL_6U; path=/; httponly; secure; SameSite=Strict;”
其中：SameSite=Strict 字段表示不允许跨域，此字段含义请自行百度查看

通过以下代码去掉SameSite=Strict

function remove_samesite()
--ngx.log(ngx.ERR,"replace_rsp_cookie")
local cookies = ngx.header.set_cookie or {}
if type(cookies) == "string" then
	cookies = {cookies}
end
for key, value in ipairs(cookies) do
	local v=string.gsub(value,"SameSite=Strict;" ,"")
		cookies[key]=v
	end
end
ngx.header["Set-Cookie"] = cookies or {}

end

参考链接

如何使用header_filter_by_lua添加COOKIE
参考代码如下：
header_filter_by_lua ’
local cookies = ngx.header.set_cookie
if not cookies then return end
local newcookies = {}
for i, val in ipairs(cookies) do
local newval = string.gsub(val, “([dD]omain)=[%w_-\\.]+”,
“%1=external.domain.com”)
table.insert(newcookies, newval)
end
ngx.header.set_cookie = newcookies
';
}