public async Task GracefulShutdownWorksWithMultipleRequestsInFlight_InProcess()
{
// The goal of this test is to have multiple requests currently in progress
// and for app offline to be dropped. We expect that all requests are eventually drained
// and graceful shutdown occurs.
var deploymentParameters = Fixture.GetBaseDeploymentParameters(Fixture.InProcessTestSite);
deploymentParameters.TransformArguments((a, _) => $"{a} IncreaseShutdownLimit");
var deploymentResult = await DeployAsync(deploymentParameters);
var result = await deploymentResult.HttpClient.GetAsync("/HelloWorld");
// Send two requests that will hang until data is sent from the client.
var connectionList = new List <TestConnection>();
for (var i = 0; i < 2; i++)
{
var connection = new TestConnection(deploymentResult.HttpClient.BaseAddress.Port);
await connection.Send(
"POST /ReadAndCountRequestBody HTTP/1.1",
"Content-Length: 1",
"Host: localhost",
"Connection: close",
"",
"");
await connection.Receive(
"HTTP/1.1 200 OK", "");
await connection.ReceiveHeaders();
await connection.Receive("1", $"{i + 1}");
connectionList.Add(connection);
}
// Send a request that will end once app lifetime is triggered (ApplicationStopping cts).
var statusConnection = new TestConnection(deploymentResult.HttpClient.BaseAddress.Port);
await statusConnection.Send(
"GET /WaitForAppToStartShuttingDown HTTP/1.1",
"Host: localhost",
"Connection: close",
"",
"");
await statusConnection.Receive("HTTP/1.1 200 OK",
"");
await statusConnection.ReceiveHeaders();
// Receiving some data means we are currently waiting for IHostApplicationLifetime.
await statusConnection.Receive("5",
"test1",
"");
AddAppOffline(deploymentResult.ContentRoot);
// Receive the rest of all open connections.
await statusConnection.Receive("5", "test2", "");
for (var i = 0; i < 2; i++)
{
await connectionList[i].Send("a", "");
await connectionList[i].Receive("", "4", "done");
connectionList[i].Dispose();
}
deploymentResult.AssertWorkerProcessStop();
// Shutdown should be graceful here!
EventLogHelpers.VerifyEventLogEvent(deploymentResult,
EventLogHelpers.InProcessShutdown(), Logger);
}
