在 Ruby 中从 Facebook Open Graph 响应获取访问令牌
我正在尝试在我的 ruby sinatra 应用程序中使用 facebook 实现单点登录。到目前为止，我一直在关注本教程：
http://jaywiggins。 com/2010/05/facebook-oauth-with-sinatra/
我能够向用户发送连接到我的应用程序的请求，但我在实际“获取”访问令牌时遇到困难。用户可以毫无问题地连接，并且我收到带有“code”参数的响应，我应该用它来交换访问令牌 - 但我在这里遇到了困难。
因此，我提交带有以下参数的网址：
https://graph.facebook.com/oauth/access_token /{client_id}&{client_secret}&{code}&{redirect_uri}
上面大括号中的单词显然被值替换了。
我使用以下代码提交此内容：
response = open(url)
这似乎没有以访问令牌的方式返回任何有用的内容（它有一个 @base_uri，这是我上面提交的 url 和一些其他参数，尽管看起来没什么用处）。但是，如果我获取提交的 URL 并将其粘贴到浏览器中，我会收到一个访问令牌。
谁能告诉我如何从 Facebook 获取请求并提取访问令牌？
谢谢。
I'm trying to implement single sign-on using facebook in my ruby sinatra app. So far, I've been following this tutorial:
http://jaywiggins.com/2010/05/facebook-oauth-with-sinatra/
I am able to send a request for a user to connect to my application but I'm having trouble actually "getting" the access token. The user can connect without trouble and I receive a response with the "code" parameter, which I'm supposed to use to exchange an Access Token - but its here where I get stuck.
So I submit a url with the following parameters:
https://graph.facebook.com/oauth/access_token/{client_id}&{client_secret}&{code}&{redirect_uri}
The words in the curly brackets above are obviously replaced by the values.
I submit this using the following code:
response = open(url)
This doesn't seem to return anything of use in the way of an access token (it has a @base_uri which is the url I submitted above and few other parameters, though nothing useful looking). However, if I take that url I submitted and paste it into a browser, I receive back an access token.
Can anyone tell me how I can get the request back from facebook and pull out the access token?
Thanks.
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假设您正在使用
open-uri，您应该会获得带有一些扩展名的文件句柄。这意味着您可以像读取任何文件句柄一样读取响应的正文。
然后你可能想要解析 json 并提取访问令牌：
assuming you are using
open-uri, you should be getting a file handle back with some extensions.That means you can get the body of the response by reading it like any file handle.
Then you probably want to parse the json and pull out the access token: