added qrcode.rb

lib/weixin_authorize/api/qrcode.rb

+# encoding: utf-8
+module WeixinAuthorize
+  module Api
+    module Qrcode
+    # http://mp.weixin.qq.com/wiki/index.php?title=生成带参数的二维码
+
+      # 临时二维码
+      def create_qr_scene(scene_id, expire_seconds=1800)
+        post_url = "#{qrcode_base_url}/create"
+        qrcode_infos = {action_name: "QR_SCENE"}
+        qrcode_infos = qrcode_infos.merge(action_info(scene_id, expire_seconds))
+        http_post(post_url, qrcode_infos)
+      end
+
+      # 临时二维码
+      def create_qr_limit_scene(scene_id, expire_seconds=1800)
+        post_url = "#{qrcode_base_url}/create"
+        qrcode_infos = {action_name: "QR_LIMIT_SCENE"}
+        qrcode_infos = qrcode_infos.merge(action_info(scene_id, expire_seconds))
+        http_post(post_url, qrcode_infos)
+      end
+
+      # 通过ticket换取二维码
+      def get_qr_code(ticket)
+        get_url = "/showqrcode"
+        http_get(get_url, {ticket: ticket})
+      end
+
+      private
+
+        def qrcode_base_url
+          "/qrcode"
+        end
+
+        def action_info(scene_id, expire_seconds)
+          {expire_seconds: expire_seconds, action_info: {scene: {scene_id: scene_id}}}
+        end
+
+    end
+  end
+end