如何在Node.js中执行DNS查找
[英]How is DNS lookup performed in nodejs
问题描述
We are facing a challenge with AWSlambda on node js, where DNS.resolve vs. dns.lookup are giving different results. 
我们在节点js上使用AWSlambda面临挑战，其中DNS.resolve与dns.lookup给出不同的结果。 Where former faulting more than latter. 前者的缺点比后者多。 And http.client also fails with almost same frequency. 而且http.client也几乎以相同的频率失败。 I'm interested in understanding, how http module handles DNS lookup. 我有兴趣了解http模块如何处理DNS查找。
1 个解决方案
解决方案1
1 已采纳 2017-11-21 05:13:12
http.get() calls lookupAndConnect() in net.js which then calls lookup() in dns.js which then calls cares.getaddrinfo() which is in native code which calls uv_getaddrinfo() which has various platform implementations. http.get()调用lookupAndConnect()中net.js然后调用lookup()中dns.js然后调用cares.getaddrinfo()其是在它调用本机代码uv_getaddrinfo()其具有不同的平台实现。 Here are links to the windows and unix implementations. 这是Windows和Unix实现的链接。 The source is all on github for you to analyze. 源码全部在github上供您分析。
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