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Keda
2025-09-13 13:40:32 +02:00
parent 8d0c3aafb3
commit 693d3c6af7
7 changed files with 202 additions and 32 deletions
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75
MareSynchronosServer/MareSynchronosAuthService/Services/Discovery/RedisPresenceStore.cs
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@@ -24,8 +24,9 @@ public sealed class RedisPresenceStore : IDiscoveryPresenceStore
private static string KeyForHash(string hash) => $"nd:hash:{hash}";
private static string KeyForToken(string token) => $"nd:token:{token}";
private static string KeyForUidSet(string uid) => $"nd:uid:{uid}";
public void Publish(string uid, IEnumerable<string> hashes, string? displayName = null)
public void Publish(string uid, IEnumerable<string> hashes, string? displayName = null, bool allowRequests = true)
{
var entries = hashes.Distinct(StringComparer.Ordinal).ToArray();
if (entries.Length == 0) return;
@@ -33,30 +34,85 @@ public sealed class RedisPresenceStore : IDiscoveryPresenceStore
foreach (var h in entries)
{
var key = KeyForHash(h);
var payload = JsonSerializer.Serialize(new Presence(uid, displayName), _jsonOpts);
var payload = JsonSerializer.Serialize(new Presence(uid, displayName, allowRequests), _jsonOpts);
batch.StringSetAsync(key, payload, _presenceTtl);
// Index this hash under the publisher uid for fast unpublish
batch.SetAddAsync(KeyForUidSet(uid), h);
batch.KeyExpireAsync(KeyForUidSet(uid), _presenceTtl);
}
batch.Execute();
_logger.LogDebug("RedisPresenceStore: published {count} hashes", entries.Length);
}
public (bool Found, string Token, string? DisplayName) TryMatchAndIssueToken(string requesterUid, string hash)
public void Unpublish(string uid)
{
try
{
var setKey = KeyForUidSet(uid);
var members = _db.SetMembers(setKey);
if (members is { Length: > 0 })
{
var batch = _db.CreateBatch();
foreach (var m in members)
{
var hash = (string)m;
var key = KeyForHash(hash);
// Defensive: only delete if the hash is still owned by this uid
var val = _db.StringGet(key);
if (val.HasValue)
{
try
{
var p = JsonSerializer.Deserialize<Presence>(val!);
if (p != null && string.Equals(p.Uid, uid, StringComparison.Ordinal))
{
batch.KeyDeleteAsync(key);
}
}
catch { /* ignore corrupted */ }
}
}
// Remove the uid index set itself
batch.KeyDeleteAsync(setKey);
batch.Execute();
}
else
{
// No index set: best-effort, just delete the set key in case it exists
_db.KeyDelete(setKey);
}
_logger.LogDebug("RedisPresenceStore: unpublished all hashes for uid {uid}", uid);
}
catch (Exception ex)
{
_logger.LogWarning(ex, "RedisPresenceStore: Unpublish failed for uid {uid}", uid);
}
}
public (bool Found, string? Token, string TargetUid, string? DisplayName) TryMatchAndIssueToken(string requesterUid, string hash)
{
var key = KeyForHash(hash);
var val = _db.StringGet(key);
if (!val.HasValue) return (false, string.Empty, null);
if (!val.HasValue) return (false, null, string.Empty, null);
try
{
var p = JsonSerializer.Deserialize<Presence>(val!);
if (p == null || string.IsNullOrEmpty(p.Uid)) return (false, string.Empty, null);
if (string.Equals(p.Uid, requesterUid, StringComparison.Ordinal)) return (false, string.Empty, null);
if (p == null || string.IsNullOrEmpty(p.Uid)) return (false, null, string.Empty, null);
if (string.Equals(p.Uid, requesterUid, StringComparison.Ordinal)) return (false, null, string.Empty, null);
// Visible but requests disabled → return without token
if (!p.AllowRequests)
{
return (true, null, p.Uid, p.DisplayName);
}
var token = Guid.NewGuid().ToString("N");
_db.StringSet(KeyForToken(token), p.Uid, _tokenTtl);
return (true, token, p.DisplayName);
return (true, token, p.Uid, p.DisplayName);
}
catch
{
return (false, string.Empty, null);
return (false, null, string.Empty, null);
}
}
@@ -70,6 +126,5 @@ public sealed class RedisPresenceStore : IDiscoveryPresenceStore
return true;
}
private sealed record Presence(string Uid, string? DisplayName);
private sealed record Presence(string Uid, string? DisplayName, bool AllowRequests);
}