node.js浅入深出---之事件循环机制

var http = require("http");

var server = http.createServer(function(req,res){
//得到url
var userurl = req.url;

res.writeHead(200,{"Content-Type":"text/html;charset=UTF8"})
//substr函数来判断此时的开头
if(userurl.substr(0,9) == "/student/"){
var studentid = userurl.substr(9);
console.log(studentid);
if(/^\d{10}$/.test(studentid)){
res.end("您要查询学生信息，id为" + studentid);
}else{
res.end("学生学号位数不对");
}
}else if(userurl.substr(0,9) == "/teacher/"){
var teacherid = userurl.substr(9);
if(/^\d{6}$/.test(teacherid)){
res.end("您要查询老师信息，id为" + teacherid);
}else{
res.end("老师学号位数不对");
}
}else{
res.end("请检查url");
}
});

server.listen(3000,"127.0.0.1");