Rails：尝试连接到Facebook时，OAuth2 gem返回400错误

我试图将Facebook连接添加到我们的Web应用程序，并且遇到了问题。一切工作正常本地（我可以通过Facebook的身份验证），但是当我的代码推到我们的开发服务器（生活在野外），每次我尝试验证它返回以下错误代码：Rails：尝试连接到Facebook时，OAuth2 gem返回400错误

OAuth2::HTTPError: Received HTTP 400 during request

这是我得到的唯一解释。再次，这在我的本地机器上运行，以及盒子之间的宝石和这种匹配，所以我有点困惑。这是我正在执行的代码。

def facebook_connect 
    #Set the scope we want to pull from Facebook, along with the callback URL 
    options = { 
    :redirect_uri => facebook_callback_url, 
    :scope => "email,publish_stream" 
    } 

    #Go out and fetch the url 
    client = OAuth2::Client.new(FACEBOOK_API_KEY, FACEBOOK_SECRET, {:site => FACEBOOK_API_URL, :access_token_method => :post}) 
    #Redirect to the callback for processing 
    redirect_to client.web_server.authorize_url(options) 
end 

def facebook_callback 
    #Client URL 
    client = OAuth2::Client.new(FACEBOOK_API_KEY, FACEBOOK_SECRET, {:site => FACEBOOK_API_URL, :access_token_method => :post}) 

    #Parse out the access token 
    access_token = client.web_server.get_access_token(params[:code], :redirect_uri => facebook_callback_url) 

    #Get the user 
    fb_user = JSON.parse(access_token.get('/me')) 

    #Do some authentication database stuff 
end 

def facebook_callback_url 
    uri = URI.parse(request.url) 
    uri.path = '/users/facebook_callback' 
    uri.query = nil 
    uri.to_s 
end

我搜索了Google，但显示的解决方案无效。另外，如果有人知道如何解析和显示OAuth2错误，我也会很感激。谢谢

来源

2011-05-06 Kevin Whitaker