将openid存到session

app/controllers/wechats_controller.rb

@@ -150,11 +150,20 @@ class WechatsController < ActionController::Base
   end
 
 
+
+
+  ###  controller method
+  include Controllers
+
+  module Controllers
     def get_open_id
       begin
-      raise "非法操作, code不存在" unless params[:code]
-      openid = get_openid_from_code(params[:code])
-      raise "无法获取到openid" unless openid
+
+        code = params[:code] || session[:wechat_code]
+        openid = get_openid_from_code(code)
+
+
+        raise "无法获取到微信openid" unless openid
         render :json => {status:0, openid: openid}
       rescue Exception=>e
         render :json => {status: -1, msg: e.message}
@@ -163,8 +172,10 @@ class WechatsController < ActionController::Base
 
     def bind
       begin
-       raise "非法操作, code不存在" unless params[:code]
-       openid = get_openid_from_code(params[:code])
+
+        code = params[:code] || session[:wechat_code]
+        openid = get_openid_from_code(code)
+
         raise "无法获取到openid" unless openid
         raise "此微信号已绑定用户, 不能重复绑定" if user_binded?(openid)
 
@@ -172,7 +183,7 @@ class WechatsController < ActionController::Base
         raise "用户名或密码错误,请重新登录" unless user
         #补全用户信息
 
-       raise "此用户已经绑定了公众号" if user.user_wechat
+        raise "此用户已经绑定过公众号, 请换一个帐户试试" if user.user_wechat
 
         UserWechat.create!(
             openid: openid,
@@ -185,17 +196,25 @@ class WechatsController < ActionController::Base
     end
 
     def login
-    @code = params[:code] #TODO 安全性
+      session[:wechat_code] = params[:code] if params[:code]
       render 'wechats/login', layout: 'base_wechat'
     end
 
     private
     def get_openid_from_code(code)
-    url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=#{Wechat.config.appid}&secret=#{Wechat.config.secret}&code=#{code}&grant_type=authorization_code"
-    logger.debug url
-    body = URI.parse(url).read
-    logger.debug body
-    JSON.parse(body)["openid"]
+      openid = session[:wechat_openid]
+
+      unless openid
+        if code
+          openid = wechat.web_access_token(code)["openid"]
+        end
+      end
+
+      if openid
+        session[:wechat_openid] = openid
+      end
+
+      return openid
     end
 
     def user_binded?(openid)
@@ -234,3 +253,5 @@ class WechatsController < ActionController::Base
       end
     end
   end
+
+end

app/views/wechats/login.html.erb

@@ -12,19 +12,17 @@
         <div class="weui_cell">
           <div class="weui_cell_hd"><label class="weui_label">用户名</label></div>
           <div class="weui_cell_bd weui_cell_primary">
-            <input class="weui_input" autocapitalize="off" type="text" name="username" placeholder="请输入邮箱地址或昵称"/>
+            <input class="weui_input" autocapitalize="off" type="text" name="username" placeholder="请输入邮箱地址/登录名"/>
           </div>
         </div>
 
         <div class="weui_cell">
           <div class="weui_cell_hd"><label class="weui_label">密码</label></div>
           <div class="weui_cell_bd weui_cell_primary">
-            <input class="weui_input" type="password" name="password" placeholder="请输密码"/>
+            <input class="weui_input" type="password" name="password" placeholder="请输入密码"/>
           </div>
         </div>
 
-      <input type="hidden" value="<%=@code%>" name="code">
-
         <div class="weui_btn_area">
           <a class="weui_btn weui_btn_primary" id="submitForm">确定</a>
         </div>