dns

Tell urllib2 to use custom DNS

由 六月ゝ 毕业季﹏ 提交于 2019-12-17 07:15:18
问题 I'd like to tell urllib2.urlopen (or a custom opener ) to use 127.0.0.1 (or ::1 ) to resolve addresses. I wouldn't change my /etc/resolv.conf , however. One possible solution is to use a tool like dnspython to query addresses and httplib to build a custom url opener. I'd prefer telling urlopen to use a custom nameserver though. Any suggestions? 回答1: Looks like name resolution is ultimately handled by socket.create_connection . -> urllib2.urlopen -> httplib.HTTPConnection -> socket.create

Tell urllib2 to use custom DNS

由 会有一股神秘感。 提交于 2019-12-17 07:15:02
问题 I'd like to tell urllib2.urlopen (or a custom opener ) to use 127.0.0.1 (or ::1 ) to resolve addresses. I wouldn't change my /etc/resolv.conf , however. One possible solution is to use a tool like dnspython to query addresses and httplib to build a custom url opener. I'd prefer telling urlopen to use a custom nameserver though. Any suggestions? 回答1: Looks like name resolution is ultimately handled by socket.create_connection . -> urllib2.urlopen -> httplib.HTTPConnection -> socket.create

Mac OSX Lion DNS lookup order [closed]

由 房东的猫 提交于 2019-12-17 07:01:10
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . After upgrading to Mac OSX Lion I figured out that /etc/hosts is not looked up in first place for name resolution anymore. This leads to some side effects like: Entries in /etc/hosts are resolved painfully slow You can't not override existing domains, e.g. 127.0.0.1 www.google.com If you get search domain

Why does Microsoft Edge open some local websites, but not others, where the domain name is routed to 127.0.0.1 in hosts file

由 半世苍凉 提交于 2019-12-17 04:45:23
问题 Like a lot of programmers, I test sites locally. I use the hosts file to map domain names to my local ip (127.0.0.1). I use qualified domain names, usually with a "d" subdomain (for "development"). For example: d.somewebsite.com d.anotherwebsite.com and so on... In Microsoft edge, most of the web sites work. However, a couple of them do not. There is nothing special or weird about the domain names that won't work. Just a simple d.someletters.com . They work fine in Chrome, IE, and Firefox. In

Error: getaddrinfo EAI_AGAIN

由 落花浮王杯 提交于 2019-12-17 02:49:10
问题 My server threw this today, which is a nodejs error I've never seen before. Error: getaddrinfo EAI_AGAIN my-store.myshopify.com:443 at Object.exports._errnoException (util.js:870:11) at errnoException (dns.js:32:15) at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:78:26) I'm wondering if this is related to the DynDns DDOS attack which affected Shopify and many other services today. Here's an article about that. My main question is what does dns.js do? What part of node is it apart of? I

ajax请求过程

由 亡梦爱人 提交于 2019-12-17 02:48:26
1.什么是ajax AJAX=Asynchronous JavaScript and XML =====>异步的javascript和xml AJAX是在不重新加载整个页面的情况下与服务器交换数据并更新部分网页的艺术，是一种用于创建快速动态网页的技术。 XMLHttpRequest 是AJAX的基础,现代所有浏览器均支持XMLHttpRequest对象（IE5、IE6使用ActiveXObject）。 2.创建ajax实例 创建XMLHttpRequest对象的语法： var httpObj=new XMLHttpRequest(); 3.向服务器发送请求：使用XMLHttpRequest 对象的 open() 和 send() 方法： httpObj.open(method,url,async); httpObj.send(); send(string )将请求发送到服务器，string仅用于POST请求 method:请求的类型；GET或POST URL:文件在服务器上的位置 async：true（异步）false：（同步）默认是异步 为了避免get到的是缓存的结果，请向 URL 添加一个唯一的 ID： httpObj.open("GET","demo_get.asp?t=" + Math.random(),true); httpObj.send(); 如果需要像 HTML

Linux搭建DNS服务器

由 牧云@^-^@ 提交于 2019-12-17 02:15:50
安装bind软件 yum -y install bind* vi /etc/named.conf文件，把里面的127.0.0.1以及localhost改成any vi /etc/named.rfc1912.zones 添加如下内容： zone "169.168.192.in-addr.arpa" IN { type master; file "169.168.192.in-addr.arpa"; allow-update { none; }; }; zone "scan-cluster.localdomain" IN { type master; file "named.localhost"; allow-update { none; }; }; 拷贝named.localhost文件为169.168.192.in-addr.arpa，cp的时候带上-p参数，统一用户组 [root@localhost named]# pwd /var/named [root@localhost named]# ls 169.168.192.in-addr.arpa data named.ca named.localhost.rpmsave chroot dynamic named.empty named.loopback chroot_sdb dyndb-ldap named.localhost

大型网站的灵魂——性能

由 夙愿已清 提交于 2019-12-17 02:02:05
前言 在前一篇随笔 《大型网站系统架构的演化》 中，介绍了大型网站的演化过程，期间穿插了一些技术和手段，我们可以从中看出一个大型网站的轮廓，但想要掌握设计开发维护大型网站的技术，需要我们一步一步去研究实践。所以我打算写一个系列，从理论到实践讲述大型网站的点滴，这也是一个共同学习的过程，希望自己能坚持下去。系列大概会分为两部分，理论和实践，理论部分尽量通俗易懂，也要讲一些细节。实践部分会抽取一些技术做实践，将方法、解决问题过程分享出来。 本文将讲述大型网站中一个重要的要素，性能。 什么是性能 有人说性能就是访问速度快慢，这是最直观的说法，也是用户的真实体验。一个用户从输入网址到按下回车键，看到网页的快慢，这就是性能。对于我们来说，需要去挖掘这个过程，因为这决定我们怎么去做性能优化。 这中间发生了什么？ 用户访问网站的整个流程：用户输入网站域名，通过DNS解析，找到目标服务器IP，请求数据经互联网达到目标服务器，目标服务器收到请求数据，进行处理（执行程序、访问数据库、文件服务器等）。处理完成，将响应数据又经互联网返回给用户浏览器，浏览器得到结果进行计算渲染显示给用户。 我们把整个过程，分为三段路径： 1、第一段在用户和浏览器端，主要负责发出用户请求，以及接受响应数据进行计算渲染显示给用户； 2、第二段在网络上，负责对请求数据、响应数据的传输； 3、第三段在网站服务器端

Wildcards in a Windows hosts file

由 走远了吗. 提交于 2019-12-17 00:19:09
问题 I want to setup my local development machine so that any requests for *.local are redirected to localhost . The idea is that as I develop multiple sites, I can just add vhosts to Apache called site1.local , site2.local etc, and have them all resolve to localhost , while Apache serves a different site accordingly. I am on Windows XP. I tried adding 127.0.0.1 *.local to my c:\windows\system32\drivers\etc\hosts file, also tried: 127.0.0.1 .local Neither of which seem to work. I know I can set

Kubernetes部署DNS

由 梦想与她 提交于 2019-12-16 15:55:54
前言 阅读地址 http://thoreauz.com/2017/04/16/docker/Kubernetes%E9%83%A8%E7%BD%B2DNS%E5%92%8CDashboard/ Kubernetes中的dns是什么？ k8s的服务发现有两种，第一种是基于环境变量，第二种是基于DNS。 第一种环境变量 1.比如生成个pod的容器，默认情况，外部是不能访问容器内部的。 2.我们生成service的资源对象，绑定第一步的pod容器，后生成的pod容器的环境变量会增加第一步的service生成的集群IP。 3.这种方式缺点明显，第一个pod容器是找不到后面pod容器生成的service对象。 第二种基于DNS. 1.首先整个kube-dns的容器，它负责去获取service对应的服务 2.再整个kube-dnsmasq-amd64:1.4容器，它是个dns服务端 3.第一步检测的service的变化就自动更新到第二部的dns服务端 4.其他业务容器启动时的dns指定第二步容器的集群IP，我们可以通过cat /etc/resolv.conf 查看是否生效. 实战,如果按照作者的方法去做，dns一会就死了，改进版 1.线生成kube-dns和kube-dnsmasq容器的配置文件skydns-rc.yaml apiVersion: extensions/v1beta1 kind
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