如何从Facebook回调URL解析`access_token`？

Question

This is the request Facebook calls back:

/facebook/promo/#access_token=162592277090170%7C2.yCch3otjrdit_rgBFS6F0A__.3600.1285369200-727781553%7CtugQmoO0bRiadumHVQrrSiPRD9Y&expires_in=7174

How can I parse the access_token from the URL? I could not find any way to get the access_token value.

Please be aware that it is not a reqular parameter.

Answer 1

If you're only after the access_token=... section, just use some simple string matching:

url = '/facebook/promo/#access_token=162592277090170%7C2.yCch3otjrdit_rgBFS6F0A__.3600.1285369200-727781553%7CtugQmoO0bRiadumHVQrrSiPRD9Y&expires_in=7174'
url[/#access_token=(.+)&/, 1]
=> "162592277090170%7C2.yCch3otjrdit_rgBFS6F0A__.3600.1285369200-727781553%7CtugQmoO0bRiadumHVQrrSiPRD9Y"

That looks for #access_token= and grabs everything up to & .

Answer 2

You could use a Regex to match it out of the url. Or simply take everything as a sub-string between access_token= and the next & -character or the end of the url, which ever comes first.

Answer 3

I believe that it's not possible - the part after # is simply ignored. See this answer: Rails: Extracting the raw url from the request