ruby-on-rails-3 - 那里有 Facebook Credits Ruby On Rails 宝石吗？或者他们的 Facebook Credits 示例应用程序的红宝石版本？

Question

我想在我的 Facebook 应用中实现 Facebook Credits。有人知道 Ruby on Rails 中提供的 Facebook Credits 示例应用程序版本吗？有人为此制作了宝石吗？如果我找到一个我会在下面链接...

Answer 1

这是我的代码，采用 FB 示例并对其进行 RORing：

require 'facebook_signed_request.rb'

class FacebookCreditsController < ApplicationController

skip_before_filter :verify_authenticity_token
layout nil

  def index
    facebook_request = FacebookSignedRequest.new(request.params['signed_request'])
    data = { "content" => {} }
    # handle invalid request
    if !facebook_request.valid?
      return
    end

    signed_request = facebook_request.signed_request

    # handle invalid signed request
    if signed_request.nil?
      return
    end

    method = request.params['method']

    order_id = request.params['order_id']

    # second state response from facebook
    if method == 'payments_status_update'
      status = request.params['status']

      if status == 'placed'
        next_state = 'settled'
        data['content']['status'] = next_state
      elsif status == 'settled'
        redirect_to '/lots'
        return
      end

      # compose returning data array_change_key_case
      data['content']['order_id'] = order_id

    # first stage response from facebook
    elsif method == 'payments_get_items'

      order_info = request.params['order_info']

      item = JSON.parse(order_info)
      item['price'] = item['price'].to_i

      # for url fields, if not prefixed by http://, prefix them
      url_key = [ 'product_url', 'image_url' ]
      url_key.each do |key|
        if item[key][0..6] != 'http://'
          item[key] = "http://#{item[key]}"
        end
      end

      # if payload['test_mode']
      if request.params['test_mode']
        update_keys = ['title', 'description']
        update_keys.each do |key|
            item[key] = '[Test Mode] ' + item[key]
        end
      end

      data['content'] = [item]  
    end

    data['method'] = method

    render :json => data
  end

end

然后除此之外还有：

require 'base64'
require 'json'
require 'openssl'

class FacebookSignedRequest

  attr_reader :signed_request

  def initialize(signed_request)
    @signed_request = signed_request
  end

  def base64_url_decode str
    encoded_str = str.gsub('-','+').gsub('_','/')
    encoded_str += '=' while !(encoded_str.size % 4).zero?
    Base64.decode64(encoded_str)
  end

  def valid?
    # TODO: move it to some configuration
    secret = " << my secret is here >>"

    # decode data
    encoded_sig, payload = signed_request.split('.')
    sig = base64_url_decode(encoded_sig).unpack("H*")[0]
    data = JSON.parse base64_url_decode(payload)

    if data['algorithm'].to_s.upcase != 'HMAC-SHA256'
    # Rails.logger.error 'Unknown algorithm. Expected HMAC-SHA256'
      return false
    end

    #check sig
    expected_sig = OpenSSL::HMAC.hexdigest('sha256', secret, payload)
    if expected_sig != sig
    # Rails.logger.error 'Bad Signed JSON signature!'
      return false
    end

    data
  end

我不知道这是否对其他人有帮助，但这一切都对我有用。很抱歉花了这么长时间才记得回来发布我的工作代码......

按要求查看相关代码：

#view
<%= javascript_include_tag "premium_signup" %>
<script type="text/javascript">
    $(document).ready(function() {
        $('#premium_signup_button').click(function() {
            signupAsPremiumMember('Premium Membership', 'Create unlimited auctions with no extra charge at all for 1 year.', "1", '', '');
        });
    });
</script>
...
<button id="premium_signup_button">Signup as a premium member</button>

#premium_signup.js
function signupAsPremiumMember(title, desc, price, imageURL, productURL) {
var order_info = {
    "title": title,
    "description": desc,
    "price": price,
    "image_url": imageURL,
    "product_url": productURL
};

var payload = {
    "method": 'pay',
    "order_info": order_info,
    "purchase_type": 'item'
};

console.log(FB.ui(payload, facebookPurchaseCompletionCallback));
}

function facebookPurchaseCompletionCallback(data) {
    if (data['order_id']) {
        console.log(data['order_id']);
    }
    else if (data['error_code']) {
        console.log(data['error_code']);
    }
    else {
        console.log("failed");
    }
}

#in the layout
#in head
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script src="http://connect.facebook.net/en_US/all.js"></script>
<%= javascript_include_tag 'application' %>
#in body
  <div id="fb-root"></div>
    <script>
      FB.init({
        appId  : '############',
        status : true, // check login status
        cookie : true, // enable cookies to allow the server to access the session
        xfbml  : true  // parse XFBML
      });

现在所有这一切都来自一个人，他坐下来学习了在 Ruby On Rails 中编程，而我只需要很少的支持 Javascript 知识就可以逃脱，去年大约 12 周，今年还有几周的时间。措施。我这么说是出于谨慎 - 我发布的代码可能是垃圾......但它有效:-)

如果有人真的发现任何有用的答案，我们将不胜感激 - 只是说':-)