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add positive response caching to grpc auth service to lessen load

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rootdarkarchon 2022-12-11 13:17:52 +01:00
parent a554d751b4
commit 5bd9c7d09d
1 changed files with 22 additions and 2 deletions
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24
MareSynchronosServer/MareSynchronosShared/Services/GrpcAuthenticationService.cs
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@ -1,5 +1,4 @@
using System.Collections.Concurrent;
using System.Security.Cryptography;
using MareSynchronosShared.Protos;
using Microsoft.Extensions.Logging;
@ -13,9 +12,16 @@ public class GrpcAuthenticationService : GrpcBaseService
public long Id { get; set; }
}
private record AuthResponseCache
{
public AuthReply Response { get; set; }
public DateTime WrittenTo { get; set; }
}
private readonly AuthService.AuthServiceClient _authClient;
private readonly ConcurrentQueue<AuthRequestInternal> _requestQueue = new();
private readonly ConcurrentDictionary<long, AuthReply> _authReplies = new();
private readonly ConcurrentDictionary<string, AuthResponseCache> _cachedPositiveResponses = new(StringComparer.Ordinal);
private long _requestId = 0;
public GrpcAuthenticationService(ILogger<GrpcAuthenticationService> logger, AuthService.AuthServiceClient authClient) : base(logger)
@ -25,7 +31,12 @@ public class GrpcAuthenticationService : GrpcBaseService
public async Task<AuthReply> AuthorizeAsync(string ip, string secretKey)
{
using var sha1 = SHA1.Create();
if (_cachedPositiveResponses.TryGetValue(secretKey, out var cachedPositiveResponse))
{
if (cachedPositiveResponse.WrittenTo.AddMinutes(5) < DateTime.UtcNow) return cachedPositiveResponse.Response;
_cachedPositiveResponses.Remove(secretKey, out _);
}
var id = Interlocked.Increment(ref _requestId);
_requestQueue.Enqueue(new AuthRequestInternal()
{
@ -45,6 +56,15 @@ public class GrpcAuthenticationService : GrpcBaseService
await Task.Delay(10, cts.Token).ConfigureAwait(false);
}
if (response?.Success ?? false)
{
_cachedPositiveResponses[secretKey] = new AuthResponseCache
{
Response = response,
WrittenTo = DateTime.UtcNow
};
}
return response ?? new AuthReply
{
Success = false,