keep-alive

vue路由中使用keep-alive 以及activated和deactivated 钩子

人盡茶涼 提交于 2019-11-30 16:58:54
本次只是记录下开发中碰到的问题。 最近做一个活动页面,涉及到角色和权限的问题,需要跳转很多页面,于是vue-router走起,顺便keep-alive也用起来了,嗯,跳转的很爽,但是一个详情页面组件,被两个路由组件引用了,此时发现有一个路由在调用详情组件时没有按需求刷新,并且已经在keep-alive上设置了exclude,调试了半天不能解决问题,就用最笨的办法,把一个相同的页面写在两处,要求算是做完了,但是,看着这样的代码,总觉得不舒服,并且有改动的话要改两处,很容易遗漏,于是,研究了一下,之前也测试过,感觉就是是否新创建的问题 ,正好,看文档里面有 activated和deactivated两钩子。 说说我的总结吧: 在keep-alive组件中 在引用组件,并且通过props传值时,如果所传递的参数没有发生改变,那么子组件是不会更新的,并且,在子组件上可能还需要使用v-if来修饰,这样,就可以通过activated和deactivated这两 钩子来变化数据, 贴一下代码,相当于做个笔记 <template> <div class="my-family"v-if="team_id>0"> <FamilyItem :role="team_id" :team_id="team_id" :srouce="'other'"></FamilyItem> </div> <

HTTP协议学习(1)

旧城冷巷雨未停 提交于 2019-11-30 13:20:10
1. HTTP首部信息格式 1. 简介:HTTP,即超文本传输协议,是TCP/IP协议模型中的一个应用层协议,用于描述浏览器与服务器之间进行交流的数据的固定格式。浏览器以固定格式将数据打包发送给服务器,服务器以这个固定格式对数据包进行拆包,或者相反进行。HTTP协议中的首部信息为两种,一种是HTTP请求,另一种是HTTP响应。 2. HTTP协议的请求:客户端发送请求对应的数据格式, 请求首部信息包括两部分,主要是请求行、请求头 。请求体是数据部分。 请求行 :第一个红框内的内容,包括 请求方式 (get、post等方式), 请求地址以及使用的HTTP协议版本 。在Restful标准中,每一种请求方式都有着其特殊含义,比如get表示获取资源、post表示发送文本数据、put表示发送文件、delete表示删除文件等等,但开发中我们还是只用到了get以及post get:能传输的数据大小会受到限制,而且传输的参数列表会显示在地址栏,安全性较低。 post:能传输的数据大小不会受到限制,传输的参数列表不会显示在地址栏,安全性较高。 请求头 :第二个红框内的内容就是请求头,以键值对形式存在,部分请求头字段如下 Accept :表示浏览器可以接受的数据形式。 Accept-Encoding:浏览器接受的编码格式 Content-Type:表示请求中发送的数据类型 Accept

GC.KeepAlive versus using

故事扮演 提交于 2019-11-30 11:34:58
In his article about preventing multiple instances of an application, Michael Covington presents this code: static void Main() // args are OK here, of course { bool ok; m = new System.Threading.Mutex(true, "YourNameHere", out ok); if (! ok) { MessageBox.Show("Another instance is already running."); return; } Application.Run(new Form1()); // or whatever was there GC.KeepAlive(m); // important! } He explains that the GC.KeepAlive(m) is required to prevent the garbage collector from collecting the mutex early, since there are no additional references to it. My question: will wrapping the mutex in

colly Crawler 配置 ##9

天大地大妈咪最大 提交于 2019-11-30 07:10:49
Crawler 配置 Colly的默认配置是为在一个作业中抓取少量站点而优化的。如果您想爬行数百万个站点,这种设置不是最好的。以下是一些调整: 使用持久存储后端 默认情况下,Colly将cookie和访问过的url存储在内存中。您可以用任何自定义后端替换内置的内存存储后端。详情请点击 这里 。 使用异步处理递归调用的长时间运行的工作 默认情况下,Colly在请求未完成时阻塞,因此递归调用Collector。回调访问产生不断增长的堆栈。收集器。Async = true这是可以避免的。(不要忘记在async中使用c.Wait()。) 禁用或限制连接keep-alive Colly使用HTTP keep-alive来提高抓取速度。它需要打开文件描述符,因此长时间运行的作业很容易达到max-fd限制。 HTTP Keep-alive可以通过以下代码禁用: c := colly.NewCollector() c.WithTransport(&http.Transport{ DisableKeepAlives: true, })    来源: https://www.cnblogs.com/liujie-php/p/11571153.html

c# ping a website? (keep-alive service)

久未见 提交于 2019-11-30 05:45:49
问题 is there a way in c# to be able to ping a url every 15 minutes and get a response back from the server? i want to try to see if .net can be used to build a simple tool to have asp.net websites invoke a re-build so that the first user doesn't incur the load penalty when the application is started. or if anyone has an alternative method of accomplishing the same goal... thoughts? tips? ideas? 回答1: Typically the person pushing a release should visit after they've uploaded the site just for test

How can I enable keep-alive?

夙愿已清 提交于 2019-11-30 02:50:29
I ran a Google Page Speed and it says I scored 57/100 because I need to "Enable Keep-Alive" and "Enable Compression". I did some Google searches but I can't find anything. I even contacted my domain provider and asked them to turn it on, but they said it was already on. Long story short: 1.) What is Keep-Alive? 2.) How do I enable it? Keep-alive is using the same tcp connection for HTTP conversation instead of opening new one with each new request. You basically need to set HTTP header in your HTTP response Connection: Keep-Alive Read more here Configure Apache KeepAlive settings Open up

How to use tcp_keepalives settings in Postgresql?

大城市里の小女人 提交于 2019-11-29 17:49:20
问题 Postgresql has 3 keepalive settings for managing dropped connections (in postgresql.conf): tcp_keepalives_count tcp_keepalives_idle tcp_keepalives_interval By default these are 0. The behavior I would like is for Postgresql to drop client connections after a period of time, should the client lose its network connection or go to sleep. I am currently using these values: tcp_keepalives_count = 1 tcp_keepalives_idle = 60 tcp_keepalives_interval = 60 I am running PostgreSQL 8.4 on Mac OS X, but

GC.KeepAlive versus using

此生再无相见时 提交于 2019-11-29 17:09:33
问题 In his article about preventing multiple instances of an application, Michael Covington presents this code: static void Main() // args are OK here, of course { bool ok; m = new System.Threading.Mutex(true, "YourNameHere", out ok); if (! ok) { MessageBox.Show("Another instance is already running."); return; } Application.Run(new Form1()); // or whatever was there GC.KeepAlive(m); // important! } He explains that the GC.KeepAlive(m) is required to prevent the garbage collector from collecting

How to keep alive Java objects?

谁都会走 提交于 2019-11-29 15:23:26
I'm just thinking about a way of keeping away Java objects from garbage collection even if it is not being referred for a reasonable amount of time. How to do that? [...] even if it is not being referred for a reasonable amount of time . If there's any chance what so ever that an object will be accessed in the future, the object will not be garbage collected . This is due to the fact that if you have a reference to the object, it won't be garbage collected, and if you don't have a reference to the object, there's no way you will be able to access it ever. In other words, an ordinary reference