在 Rails 应用程序中设置 facebook canvas url 和路线的正确方法
我有一个现有的 Rails 应用程序，我正在向其中添加一个新控制器来处理来自我正在构建的小型 facebook 应用程序（使用 facebooker 插件）的请求。
在 facebook 应用程序的配置中，我将画布回调 url 设置为 http://my.host.ip/fb/< /a>
在纯 Facebook 应用程序中，URL 将省略 /fb/，用户将被定向到应用程序的主页。但由于这是一个现有的应用程序，我不能这样做。
现在在我的routes.rb中，我有：
map.connect '/fb/like/:id', :controller => 'facebook_app', :action => "like"
map.connect '/fb/:category', :controller => 'facebook_app', :action => "index", :category => "default"
Ao 当用户访问 http://apps.facebook.com/my_app_name / facebook 调用 http://my.host.ip/fb/ 渲染效果很好。
在该页面上，我有指向“喜欢”操作的链接：
<%= link_to "like", :controller => "fb", :action => "like", :id => id %>
唯一的问题是这些内容呈现为：
http://apps.facebook.com/my_app_name/fb/like/12345
当我想要的是：
http://apps.facebook.com/my_app_name/like/12345
看看/fb/如何让我悲伤？
有办法解决这个问题吗？或者在路由定义中以某种方式表明 /fb/ 仅用于传入 URL？或者在 url 生成器中以某种方式省略 /fb/?
我找到了一个解决方法......如果我将此路由添加到现有的“like”路由之上：
map.connect '/like/:id', :controller => 'facebook_app', :action => "like"
那么第一个路由就是 link_to url 生成器使用的路由，并生成正确的 URL：
http://apps.facebook.com/my_app_name/like/12345
点击后，Facebook 会向我的应用程序发出此请求：
http://my.host.ip/fb/like/12345
与原来匹配“喜欢”路线。
不过，我不想对 Facebook 控制器中的每个操作都执行此操作。
I have an existing rails application to which i am adding a new controller to handle requests from a small facebook app (using the facebooker plugin) i am building.
In the facebook app's config i set the canvas callback url to http://my.host.ip/fb/
In a pure facebook application the url would leave off the /fb/ and the user would be directed to the app's home page. but since this is an existing application, i cannot do that.
Now in my routes.rb i have:
map.connect '/fb/like/:id', :controller => 'facebook_app', :action => "like"
map.connect '/fb/:category', :controller => 'facebook_app', :action => "index", :category => "default"
Ao when the user visits http://apps.facebook.com/my_app_name/ facebook makes a call to http://my.host.ip/fb/ and that renders fine.
On that page i have links to the "like" action:
<%= link_to "like", :controller => "fb", :action => "like", :id => id %>
Only problem is these get rendered as:
http://apps.facebook.com/my_app_name/fb/like/12345
When what i want is:
http://apps.facebook.com/my_app_name/like/12345
See how the /fb/ is causing me grief?
Is there a way around this? either some way in the routes definition to say that the /fb/ was only for incoming URLs? or some way in the url generator to omit the /fb/?
I found one workaround… if I add this route above the existing "like" route:
map.connect '/like/:id', :controller => 'facebook_app', :action => "like"
Then that first route is what's used by the link_to url generator and the correct URL gets generated:
http://apps.facebook.com/my_app_name/like/12345
Which when clicked causes facebook to make this request to my app:
http://my.host.ip/fb/like/12345
Which is matched by the original "like" route.
I'd rather not have to do this for every action in my facebook controller though.
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评论（2）
迈克·曼吉诺对此做出了回应：
http://群组。 google.com/group/facebooker/browse_thread/thread/bd37517738282a9a/91dc95ef3b1889ac?lnk=gst&q=route#91dc95ef3b1889ac
Mike Mangino responded to this here:
http://groups.google.com/group/facebooker/browse_thread/thread/bd37517738282a9a/91dc95ef3b1889ac?lnk=gst&q=route#91dc95ef3b1889ac
您可以尝试将您的callback_url设置为
http://my.host.ip/。在此操作中，您可以使用request_comes_from_facebook?方法检测请求是否来自 Facebook，如果是，则将其重定向到您的 Facebook 控制器。然后你的后续链接就可以工作了。
You could maybe try to set your callback_url to just
http://my.host.ip/. In that action, you can then detect if the request comes from Facebook withrequest_comes_from_facebook?method and redirect it to your facebook controller if it`s the case.Then your subsequent links would work.