function redirecttohost{

  var host =

  = &quot&quot + host

  }

  var errormsgdata = {

  &quot400&quot:&quot请求出现语法错误&quot,

  &quot401&quot:&quot没有访问权限&quot,

  &quot403&quot:&quot服务器拒绝执行该请求&quot,

  &quot404&quot:&quot指定的页面不存在&quot,

  &quot405&quot:&quot请求方法对指定的资源不适用&quot,

  &quot406&quot:&quot客户端无法接受相应数据&quot,

  &quot408&quot:&quot等待请求时服务器超时&quot,

  &quot409&quot:&quot请求与当前资源的状态冲突，导致请求无法完成&quot,

  &quot410&quot:&quot请求的资源已不存在，并且没有转接地址&quot,

  &quot500&quot:&quot服务器尝试执行请求时遇到了意外情况&quot,

  &quot501&quot:&quot服务器不具备执行该请求所需的功能&quot,

  &quot502&quot:&quot网关或代理服务器从上游服务器收到的响应无效&quot,

  &quot503&quot:&quot服务器暂时无法处理该请求&quot,

  &quot504&quot:&quot在等待上游服务器响应时，网关或代理服务器超时&quot,

  &quot505&quot:&quot服务器不支持请求中所用的 http 版本&quot,

  &quot1&quot:&quot无法解析服务器的 dns 地址&quot,

  &quot2&quot:&quot连接失败&quot,

  &quot-7&quot:&quot操作超时&quot,

  &quot-100&quot:&quot服务器意外关闭了连接&quot,

  &quot-101&quot:&quot连接已重置&quot,

  &quot-102&quot:&quot服务器拒绝了连接&quot,

  &quot-104&quot:&quot无法连接到服务器&quot,

  &quot-105&quot:&quot无法解析服务器的 dns 地址&quot,

  &quot-109&quot:&quot无法访问该服务器&quot,

  &quot-138&quot:&quot无法访问网络&quot,

  &quot-130&quot:&quot代理服务器连接失败&quot,

  &quot-106&quot:&quot互联网连接已中断&quot,

  &quot-401&quot:&quot从缓存

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