一个小程序，用来接收一些数字信息，并写入数据库。
var net = require(‘net’);
var sql = require(‘msnodesql’);
var useTrustedConnection = true;
var conn_str = “Driver={” + driver + “};Server=” + server + “;” + (useTrustedConnection == false ? “Trusted_Connection={Yes};” : “UID=” + user + “;PWD=” + pwd + “;”) + “Database={” + database + “};”;
var Time = new Array();
var Ip=new Array();
var index1 = 0;
var index2 = 0;
var index3 = 0;//接受数据条数
var flag = true;
var length = 12 *100;//每条数据长度为12个字节
buf1 = new Buffer(length);
buf2 = new Buffer(length);
net.createServer(function(sock) { sock.setEncoding(‘binary’); // 我们获得一个连接 - 该连接自动关联一个socket对象 console.log('CONNECTED: ’ + sock.remoteAddress + ‘:’ + sock.remotePort);
// 为这个socket实例添加一个"data"事件处理函数
sock.on('data', function(data) {
//判断buf1是否已满，满了就存入数据库，并修改个标志位
if ((flag == true) && (index1 == length)) {
sql.open(conn_str, function(err, conn) {
if (err) {
console.log(“err:” + err);
}
else {
for (var i = 0; i < index3; i++) {
conn.queryRaw(“INSERT INTO RoanCondition(speed,number,No,StartTime,Ip) VALUES(” + buf1.readFloatLE(8 + i * 12) + “,” + buf1.readInt32LE(4 + i * 12) + “,” + buf1.readInt32LE(0 + i * 12) + “,’” + Time[i] + “’,’” + Ip[i] + “’)”, function(err, results) {
if (err) {
console.log(“data1 err:” + err);
}
});
}
flag = false;
index3 = 0;
index1 = 0;
}
});
}
//判断buf2是否已满，满了就存入数据库，并修改个标志位
if ((flag == false) && (index2 == length)) {
sql.open(conn_str, function(err, conn) {
if (err) {
console.log("err:" + err);
}
else {
for (var i = 0; i < index3; i++) {
conn.queryRaw("INSERT INTO RoanCondition(speed,number,No,StartTime,Ip) VALUES(" + buf2.readFloatLE(8 + i * 12) + "," + buf2.readInt32LE(4 + i * 12) + "," + buf2.readInt32LE(0 + i * 12) + ",'" + Time[i] + "','" + Ip[i] + "')", function(err, results) {
if (err) {
console.log("data2 err:" + err);
}
});
}
flag = true;
index2 = 0;
index3 = 0;
}
});
}
//接受客户端数据
var len = data.length;
//若buf1未满，则存入
if ((flag == true) && (index1 < length)) {
for (var i = 0; i < len; i++) {
buf1[index1] = data.charCodeAt(i);
index1++;
}
//记录时间和ip
Ip[index3] = sock.remoteAddress;
var Datetime = new Date();
var time = Datetime.toLocaleTimeString();
var year = Datetime.getFullYear();
var mouth = Datetime.getMonth() + 1;
var day = Datetime.getDate();
Time[index3] = year + "-" + mouth + "-" + day + " " + time;
}
///若buf2未满，则存入
else if ((flag == false) && (index2 < length)) {
for (var i = 0; i < len; i++) {
buf2[index2] = data.charCodeAt(i);
index2++;
}
Ip[index3] = sock.remoteAddress;
var Datetime = new Date();
var time = Datetime.toLocaleTimeString();
var year = Datetime.getFullYear();
var mouth = Datetime.getMonth() + 1;
var day = Datetime.getDate();
Time[index3] = year + "-" + mouth + "-" + day + " " + time;
}
index3++;
});
// 为这个socket实例添加一个"close"事件处理函数
sock.on('close', function(data) {
console.log('CLOSED: ' +
sock.remoteAddress + ' ' + sock.remotePort);
});
//存储间隔时间
}).listen(PORT, HOST);
console.log('Server listening on ’ + HOST + ‘:’ + PORT);
