null判断

2021-08-30 12:01:59 +08:00 · 2021-08-30 12:01:59 +08:00 · b4ff9286ce
commit b4ff9286ce
parent 3c1ceba49e
1 changed files with 2 additions and 2 deletions
--- a/FastGithub.DomainResolve/DomainResolver.cs
+++ b/FastGithub.DomainResolve/DomainResolver.cs
@ -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