学步园

/**
获取IP信息 归属地 ISP
*/
IPInfo = function(ip, callback)
{
    this.http = require('http');
}

IPInfo.prototype.log = function(str)
{
    console.log(str);
}

IPInfo.prototype.GetUrl = function(ip)
{
    var url = '/iplookup/iplookup.php?format=json&ip=' + ip;
    return url;
}

IPInfo.prototype.GetHost = function()
{
    var host = 'int.dpool.sina.com.cn';
    return host;
}

IPInfo.prototype.GetInfo = function(ip, callback)
{
    var options = {
        host:        this.GetHost(),
        port:        null,
        path:        this.GetUrl(ip)
    }
    
    var curtThis = this;
    var req = this.http.get(options, function(res){
        res.setEncoding('utf8');
        var data = "";
        res.on('data', function (chunk) {
            data += chunk;
        });
        
        res.on("end", function() {
            callback(data);
            //curtThis.log(data);
        });
    });
    
    req.on('error', function(e) {
        callback(null, e);
        //curtThis.log("error");
    });
    
    req.end();
}


//example
/*
var test = new IPInfo();

var info = ["221.8.120.56","221.8.120.56","123.172.68.122"];

for(var i=0;i<3;i++)
{
test.GetInfo(info[i], function(data, err){
    if(err){console.log(err)}
    else
        console.log(data);
});
}
*/

用的新浪的接口查询的IP