public override async Task PersistsChallenge(DnsChallenge dnsChallenge)
{
List <TxtRecord> records = new List <TxtRecord>()
{
new TxtRecord()
{
Value = new[] { dnsChallenge.RecordValue }
}
};
var dnsClient = await ArmHelper.GetDnsManagementClient(this.environment);
if ((await dnsClient.RecordSets.ListByTypeAsync(environment.ResourceGroupName, environment.ZoneName, RecordType.TXT)).Any())
{
var existingRecords = await SafeGetExistingRecords(dnsChallenge);
if (existingRecords != null)
{
if (existingRecords.TxtRecords.Any(s => s.Value.Contains(dnsChallenge.RecordValue)))
{
records = existingRecords.TxtRecords.ToList();
}
else
{
records.AddRange(existingRecords.TxtRecords);
}
}
}
await dnsClient.RecordSets.CreateOrUpdateAsync(this.environment.ResourceGroupName, this.environment.ZoneName, GetRelativeRecordSetName(dnsChallenge), RecordType.TXT, new RecordSet()
{
TxtRecords = records,
TTL = 60
});
}
public override async Task CleanupChallenge(DnsChallenge dnsChallenge)
{
var existingRecords = await SafeGetExistingRecords(dnsChallenge);
var dnsClient = await ArmHelper.GetDnsManagementClient(this.environment);
await dnsClient.RecordSets.DeleteAsync(this.environment.ResourceGroupName, this.environment.ZoneName, GetRelativeRecordSetName(dnsChallenge), RecordType.TXT);
}
private async Task <RecordSet> SafeGetExistingRecords(DnsChallenge dnsChallenge)
{
try
{
var dnsClient = await ArmHelper.GetDnsManagementClient(this.environment);
return(await dnsClient.RecordSets.GetAsync(environment.ResourceGroupName, environment.ZoneName, GetRelativeRecordSetName(dnsChallenge), RecordType.TXT));
}
catch (CloudException cex)
{
if (!cex.Message.StartsWith("The resource record '_acme-challenge"))
{
throw;
}
}
return(null);
}
public AzureDnsAuthorizationChallengeProvider(IAzureDnsEnvironment azureDnsSettings)
{
this.dnsClient = ArmHelper.GetDnsManagementClient(azureDnsSettings);
this.environment = azureDnsSettings;
}