PluralKit/PluralKit.Bot/Utils/MiscUtils.cs

90 lines
3.7 KiB
C#

using System.Net.Sockets;
using Myriad.Rest.Exceptions;
using Newtonsoft.Json;
using Npgsql;
using PluralKit.Core;
using Polly.Timeout;
namespace PluralKit.Bot;
public static class MiscUtils
{
public static string ProxyTagsString(this PKMember member, string separator = ", ") =>
string.Join(separator, member.ProxyTags.Select(t => t.ProxyString.AsCode()));
public static bool IsOurProblem(this Exception e)
{
// This function filters out sporadic errors out of our control from being reported to Sentry
// otherwise we'd blow out our error reporting budget as soon as Discord takes a dump, or something.
// Occasionally Discord's API will Have A Bad Time and return a bunch of CloudFlare errors (in HTML format).
// The library tries to parse these HTML responses as JSON and crashes with a consistent exception message.
if (e is JsonReaderException jre && jre.Message ==
"Unexpected character encountered while parsing value: <. Path '', line 0, position 0.") return false;
// And now (2020-05-12), apparently Discord returns these weird responses occasionally. Also not our problem.
if (e is BadRequestException bre && bre.ResponseBody.Contains("<center>nginx</center>")) return false;
if (e is NotFoundException ne && ne.ResponseBody.Contains("<center>nginx</center>")) return false;
if (e is UnauthorizedException ue && ue.ResponseBody.Contains("<center>nginx</center>")) return false;
// Filter out timeout/ratelimit related stuff
if (e is TooManyRequestsException) return false;
if (e is RatelimitBucketExhaustedException) return false;
if (e is TimeoutRejectedException) return false;
// 5xxs? also not our problem :^)
if (e is UnknownDiscordRequestException udre && (int)udre.StatusCode >= 500) return false;
// Webhook server errors are also *not our problem*
// (this includes rate limit errors, WebhookRateLimited is a subclass)
if (e is WebhookExecutionErrorOnDiscordsEnd) return false;
// Socket errors are *not our problem*
if (e.GetBaseException() is SocketException) return false;
// Tasks being cancelled for whatver reason are, you guessed it, also not our problem.
if (e is TaskCanceledException) return false;
// Sometimes Discord just times everything out.
if (e is TimeoutException) return false;
if (e is UnknownDiscordRequestException tde && tde.Message == "Request Timeout") return false;
// HTTP/2 streams are complicated and break sometimes.
if (e is HttpRequestException) return false;
// This may expanded at some point.
return true;
}
public static bool ShowToUser(this Exception e)
{
// Ignore "Database is shutting down" error
if (e is PostgresException pe && pe.SqlState == "57P03") return false;
// Ignore *other* "database is shutting down" error (57P01)
if (e is PostgresException pe2 && pe2.SqlState == "57P01") return false;
// ignore "out of shared memory" error
if (e is PostgresException pe3 && pe3.SqlState == "53200") return false;
// Ignore database timing out as well.
if (e is NpgsqlException tpe && tpe.InnerException is TimeoutException)
return false;
// Ignore thread pool exhaustion errors
if (e is NpgsqlException npe && npe.Message.Contains("The connection pool has been exhausted"))
return false;
// ignore "Exception while reading from stream"
if (e is NpgsqlException npe2 && npe2.Message.Contains("Exception while reading from stream"))
return false;
return true;
}
}