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优化dns逻辑

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This commit is contained in:
陈国伟 2021-07-14 14:59:38 +08:00
parent 9b64df1d97
commit 7d1e5b2b2b
1 changed files with 25 additions and 14 deletions
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39
FastGithub.Dns/GithubRequestResolver.cs
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@ -8,6 +8,7 @@ using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using System;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Threading.Tasks;
@ -76,24 +77,15 @@ namespace FastGithub.Dns
var ttl = this.options.CurrentValue.GithubTTL;
var record = new IPAddressResourceRecord(question.Name, address, ttl);
response.AnswerRecords.Add(record);
this.logger.LogInformation(record.ToString());
this.logger.LogInformation($"[{domain}->{address}]");
}
}
else
{
var localhost = System.Net.Dns.GetHostName();
var addresses = await System.Net.Dns.GetHostAddressesAsync(localhost);
var ttl = TimeSpan.FromMinutes(1d);
foreach (var item in addresses)
{
if (item.AddressFamily == AddressFamily.InterNetwork)
{
var record = new IPAddressResourceRecord(question.Name, item, ttl);
response.AnswerRecords.Add(record);
this.logger.LogInformation(record.ToString());
}
}
var address = await this.GetLocalHostAddress();
var record = new IPAddressResourceRecord(question.Name, address, TimeSpan.FromMinutes(1));
response.AnswerRecords.Add(record);
this.logger.LogInformation($"[{domain}->{address}]");
}
if (response.AnswerRecords.Count == 0)
@ -103,5 +95,24 @@ namespace FastGithub.Dns
return response;
}
/// <summary>
/// 获取本机ip
/// </summary>
/// <returns></returns>
private async Task<IPAddress> GetLocalHostAddress()
{
try
{
var localhost = System.Net.Dns.GetHostName();
var addresses = await System.Net.Dns.GetHostAddressesAsync(localhost);
var address = addresses.FirstOrDefault(item => item.AddressFamily == AddressFamily.InterNetwork);
return address ?? IPAddress.Loopback;
}
catch (Exception)
{
return IPAddress.Loopback;
}
}
}
}