1、将纯真版ip数据 xxx.data 导入至 redis（整个过程只花费了几秒）
引入nuget包 CSRedisCore，使用方法见：https://github.com/2881099/csredis
/// <summary>
/// 更新ip库，请先将ip库上传至 /data/qqwry.dat，gb2312格式
/// </summary>
/// <returns></returns>
[HttpPost("update_ip")]
public APIReturn 更新ip库() {
RedisHelper.Remove("iplib");
var lines = Encoding.GetEncoding("GB2312").GetString(System.IO.File.ReadAllBytes("/data/qqwry.dat")).Split(new string[] { "
" }, StringSplitOptions.None);
var lines_index = 0;
while(lines_index < lines.Length) {
var members = new List<(double, string)>();
for (var b = 0; b < 50000; b++) {
try {
var ipstart = Lib.Ip2Long(lines[lines_index].Substring(0, 15).Trim());
var ipend = Lib.Ip2Long(lines[lines_index].Substring(16, 15).Trim());
var location = lines[lines_index].Substring(32).Replace("CZ88.NET", "").Trim();
members.Add((ipend, $"{ipstart}-{ipend} {location}"));
} catch {
}
if (++lines_index >= lines.Length) break;
}
if (members.Count > 0)
RedisHelper.ZAdd("iplib", members.ToArray());
}
return AR.成功;
}
public static long Ip2Long(string ip) {
char[] separator = new char[] { '.' };
string[] items = ip.Split(separator);
return long.Parse(items[0]) << 24
| long.Parse(items[1]) << 16
| long.Parse(items[2]) << 8
| long.Parse(items[3]);
}
public static string Long2Ip(long ipInt) {
StringBuilder sb = new StringBuilder();
sb.Append((ipInt >> 24) & 0xFF).Append(".");
sb.Append((ipInt >> 16) & 0xFF).Append(".");
sb.Append((ipInt >> 8) & 0xFF).Append(".");
sb.Append(ipInt & 0xFF);
return sb.ToString();
}
2、定义根据ip查询所在地的函数（单次查询效率在1ms以内）
public static string GetLocationByIpAddress(string ip) {
if (string.IsNullOrEmpty(ip)) return "未知";
var find = RedisHelper.ZRangeByScore("iplib", Lib.Ip2Long(ip), double.MaxValue, 1, 0);
if (find.Any()) return find.First().Substring(find.First().IndexOf(' '));
return "未知";
}