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陈国伟 2021-08-30 12:01:59 +08:00
parent 3c1ceba49e
commit b4ff9286ce
1 changed files with 2 additions and 2 deletions
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4
FastGithub.DomainResolve/DomainResolver.cs
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@ -105,7 +105,7 @@ namespace FastGithub.DomainResolve
/// <returns></returns>
private async Task<IPAddress?> ResolveCoreAsync(DnsEndPoint domain, CancellationToken cancellationToken)
{
if (this.domainResolveCache.TryGetValue<IPAddress>(domain, out var address))
if (this.domainResolveCache.TryGetValue<IPAddress>(domain, out var address) && address != null)
{
return address;
}
@ -124,7 +124,7 @@ namespace FastGithub.DomainResolve
if (address == null)
{
return default;
return null;
}
// 往往是被污染的dns