refactor client.rb

lib/weixin_authorize/client.rb

@@ -10,40 +10,63 @@ module WeixinAuthorize
     include Api::Groups
 
     attr_accessor :app_id, :app_secret, :expired_at # Time.now + expires_in
-    attr_accessor :access_token
+    attr_accessor :access_token, :redis_key
 
     # 对于多用户微信营销平台的对接，需要把每次的expired_at, access_token保存在Redis中
     # 每次使用，则可以从Redis中获取expired_at和access_token，即
-    # @client = WeixinAuthorize::Client.new(appid, appsecret, expired_at, access_token)
+    # @client = WeixinAuthorize::Client.new(appid, appsecret)
+    # 如果使用存在多个公众账号，请使用 务必传递: redis_key
     # 获取access_token，则仍然是：@client.get_access_token 来获取
-    def initialize(app_id="", app_secret="", expired_at=nil, access_token=nil)
-      @app_id       = app_id
-      @app_secret   = app_secret
-      @expired_at   = (expired_at.to_i || Time.now.to_i)
-      @access_token = access_token
-      yield self if block_given?
+    def initialize(app_id, app_secret, redis_key=nil)
+      @app_id     = app_id
+      @app_secret = app_secret
+      @expired_at = (expired_at.to_i || Time.now.to_i)
+      @redis_key  = (redis_key || "weixin_" + app_id)
     end
 
     # return token
     def get_access_token
-      # 如果当前token过期时间小于现在的时间，则重新获取一次
       authenticate if token_expired?
       @access_token
     end
 
     # authenticate access_token
     def authenticate
-      hash_infos        = http_get_without_token("/token", authenticate_options)
-      self.access_token = hash_infos["access_token"]
-      self.expired_at   = Time.now.to_i + hash_infos["expires_in"]
+      if weixin_redis.nil?
+        http_get_access_token
+      else
+        authenticate_with_redis
+      end
     end
 
     def token_expired?
-      @expired_at <= Time.now.to_i
+      if weixin_redis.nil?
+        # 如果当前token过期时间小于现在的时间，则重新获取一次
+        @expired_at <= Time.now.to_i
+      else
+        weixin_redis.hvals(redis_key).empty?
+      end
     end
 
     private
 
+      def authenticate_with_redis
+        if token_expired?
+          http_get_access_token
+          weixin_redis.hmset(redis_key, :access_token, access_token, :expired_at, expired_at)
+          weixin_redis.expireat(redis_key, expired_at.to_i-10) # 提前10秒超时
+        else
+          self.access_token = weixin_redis.hget(redis_key, "access_token")
+          self.expired_at   = weixin_redis.hget(redis_key, "expired_at")
+        end
+      end
+
+      def http_get_access_token
+        hash_infos        = http_get_without_token("/token", authenticate_options)
+        self.access_token = hash_infos["access_token"]
+        self.expired_at   = Time.now.to_i + hash_infos["expires_in"]
+      end
+
       def authenticate_options
         {grant_type: "client_credential", appid: app_id, secret: app_secret}
       end
@@ -81,5 +104,10 @@ module WeixinAuthorize
         "http://file.api.weixin.qq.com/cgi-bin"
       end
 
+      def weixin_redis
+        return nil if WeixinAuthorize.config.nil?
+        @redis ||= WeixinAuthorize.config.redis
+      end
+
   end
 end