var session_id = wx.getStorageSync('session_id') || 0;

var role = parseInt(wx.getStorageSync('role')) || 0;

wx.request({

   url: options.url,

   data: options.data,

   method: options.method || 'POST',

   header: { 'content-type': 'application/x-www-form-urlencoded', 'X-SessionId': session_id, 'X-Role': role },

   success: function(res){}

}

header中的role是数值0/1/2/3，服务端偶尔会收到'[object number]'

服务端错误：ValueError: invalid literal for int() with base 10: '[object Number]'