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I would like to achieve the following scenario:
-) A user fills out a webform specifying an email address (amongst other information)
-) After submitting the form, an email is sent to this email address
-) The email contains a link that can be used only once by the user (one time token/pass phrase)
-) If the user navigates a second time to this node (or a user comes to this node without a token at all), an information is displayed how to get the token (link to the download webform)
-) Users who are logged in can access the node/page without the specific token
So what I'm basically looking at is a one time login that gives a specific privilege for the life time of the session. The node can be accessed with this privilege, but also with other privileges granted through "normal" username/passwd logins. I don't want to give public access to a download (of a product installer), but I also don't want to force everybody to register.
There are quite a few modules out there that deal with node access:
And even more so with special / one time access, but none of the modules really does what I described. Especially in connection with the webform module:
Does anybody have an idea on how to achieve what I described?