问题
I've got an app up and running on Heroku. I've purchased a top level .com domain from 1and1 (I have other sites there, so I thought that would make life easier).
When I attempted to redirect to my Heroku app, I was not allowed to modify the CName alias record like I have done for other sites - which were all subdomains. I was given two options: Frame redirect or HTTP redirect, I've tried both. The frame redirect doesn't seem to function at all - the page stays blank. The HTTP redirect does actually get to my heroku site, but when it displays the address bar shows myproject.herokuapp.com instead of mydomain.com.
I've added both the www.mydomain.com and mydomain.com to my heroku domains.
Is there anyway to add a mask or similar?
回答1:
Short answer: you can not set CNAME for top of your domain.
Detailed answer: Why can't a CNAME record be used at the apex (aka root) of a domain?
Some DNS providers might offer workaround hacks.
来源：https://stackoverflow.com/questions/33026513/url-redirection-and-1and1