Question

以下是实施长轮询的代码。

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception
  cattr_accessor :acArray
end

ApplicationController.acArray = []

class HelloController < ApplicationController
  def initialize
    ApplicationController.acArray << self
  end

  def index
    ApplicationController.acArray.each_with_index {|val, index|
      if index == 1 # only on second request serve the first request, until then hold the object in memory
          val.render :text => ApplicationController.acArray.length
      end
    }
  end
end

问题是第一个请求立即失败并显示消息

缺少模板缺少模板hello / index，application / index with {：locale =＆gt; [：en]，：formats =＆gt; [：html] ,:handlers =＆gt; [：erb，：builder，：raw，：ruby，： jbuilder，：coffee]}。搜索：*“/ home / myhome / tmp / chat / app / views”

如何延迟渲染，不让rails搜索视图文件而不返回失败状态

Answer 1

也许这会奏效：

    until ApplicationController.acArray.length > 1 do |process|
    end
    ApplicationController.acArray.each_with_index{|val, index|
        if index == 1
            val.render :text => ApplicationController.acArray.length
        end 
    }
`

每次请求控制器的长轮询实现

1 个答案: