If the host in `default_url_options` is accidentally set with a protocol such as
```
host: "http://example.com"
```
then the generated url will have the protocol twice `http://http://example.com` which is not what the user intended. Likely they wanted to define a host `host: "example.com"` and a `protocol: "http://"` but did not know the convention.
This may not the most common problem, but when it happens it can go undetected for a while. I accidentally added `http://` out of habit recently only to find all the links in my emails were broken after deploying a demo site to production. Rather than allow this accident go undetected, we can fix the problem in line by properly setting the protocol and host.
I was able to find this related question on stack overflow: http://stackoverflow.com/questions/5878329/rails-3-devise-how-do-i-make-the-email-confirmation-links-use-secure-https-n where the answer was highly upvoted.
This is based off of work in #7415 cc/ @pixeltrix
ATP Action Mailer and Action Pack
In the current router DSL, using the +match+ DSL
method will match all verbs for the path to the
specified endpoint.
In the vast majority of cases, people are
currently using +match+ when they actually mean
+get+. This introduces security implications.
This commit disallows calling +match+ without
an HTTP verb constraint by default. To explicitly
match all verbs, this commit also adds a
:via => :all option to +match+.
Closes#5964
