pizzaboxer/errors.md

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Documentation of .NET connectivity errors

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Type: System.Net.Http.HttpRequestException
Message: No connection could be made because the target machine actively refused it.
HRESULT: 0x80004005
Inner Exception:
- Type: System.Net.Sockets.SocketException
- Message: Ditto
- Error code: 10061 (WSAECONNREFUSED)
Notes: Likely firewall caused, can be invoked by making a request to a host on a port that's not open or active

Type: System.Net.Http.HttpRequestException
Message: The requested name is valid, but no data of the requested type was found.
HRESULT: 0x80004005
Inner Exception:
- Type: System.Net.Sockets.SocketException
- Message: Ditto
- Error code: 11004 (WSANO_DATA)
Notes: Can be invoked if the domain in question is configured in hosts to point to 0.0.0.0

Type: System.Net.Http.HttpRequestException
Message: Response status code does not indicate success.
HRESULT: 0x80131500
Inner Exception: null
Notes: Invoked when HttpResponseMessage.EnsureSuccessStatusCode() is called on an errored response

Type: System.Threading.Tasks.TaskCanceledException
Message: A task was canceled.
HRESULT: 0x8013153B
Inner Exception: null
Notes: Happens when the time spent waiting for a response exceeds the defined HttpClient timeout period. Can be simulated if you set the timeout to 1 millisecond or something. Will likely be the most common error you face in production as a firewall or poor connection will typically cause this.

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