var http = require('http'), url = require('url'), dns = require('dns'), qs = require('querystring'), fs = require('fs'); function router(req,res,pathname){ switch(pathname){ case '/dnslookup': lookup(req,res); break; default: showIndex(req,res); } } function showIndex(req,res){ var pagePath = __dirname+'https://www.jb51.net/'+'dns-lookup.html'; var html = fs.readFileSync(pagePath); res.end(html); } function lookup(req,res){ var postData = ''; req.on('data',function(data){ postData+=data; }); req.on('end',function(data){ var json = qs.parse(postData); var hostname = json.host; var rrtype = json.rrtype; dns.resolve(hostname,rrtype,function(err,adresses){ if(err){ res.end(JSON.stringify({errcode:1,ips:[]})); } res.end(JSON.stringify({errcode:0,ips:adresses})); }); }); } http.createServer(function(req,res){ var pathname = url.parse(req.url).pathname; req.setEncoding("utf8"); res.writeHead(200,{'Content-Type':'text/html'}); router(req,res,pathname); }).listen(3000,'127.0.0.1');
运行效果如下：
到此这个小工具便完成了。