private async ValueTask <DoneHandle> CloseNow(bool needWakeup)
{
if (Interlocked.CompareExchange(ref closeConnectionIssued, 1, 0) == 0)
{
try
{
await outStream.CloseAsync();
}
catch (Exception)
{
}
if (needWakeup)
{
lock (shared.Mutex)
{
shared.CloseRequested = true;
}
wakeupWriter.Set();
}
}
return(DoneHandle.Instance);
}
static async Task HandleConnection(
ILoggerProvider logProvider,
ConnectionConfiguration config,
bool useUpgrade,
IReadableByteStream inputStream,
IWriteAndCloseableByteStream outputStream,
int connectionId)
{
var upgradeReadStream = new UpgradeReadStream(inputStream);
ServerUpgradeRequest upgrade = null;
try
{
// Wait for either HTTP/1 upgrade header or HTTP/2 magic header
await upgradeReadStream.WaitForHttpHeader();
var headerBytes = upgradeReadStream.HeaderBytes;
if (MaybeHttpStart(headerBytes))
{
// This seems to be a HTTP/2 request
// No upgrade necessary
// Make the header rereadable by the stream reader consumer,
// so that the library can also read the preface
upgradeReadStream.UnreadHttpHeader();
}
else
{
// This seems to be a HTTP/1 request
// Parse the header and check whether it's an upgrade
var request = Http1Request.ParseFrom(
Encoding.ASCII.GetString(
headerBytes.Array, headerBytes.Offset, headerBytes.Count - 4));
// Assure that the HTTP/2 library does not get passed the HTTP/1 request
upgradeReadStream.ConsumeHttpHeader();
if (request.Protocol != "HTTP/1.1")
{
throw new Exception("Invalid upgrade request");
}
// If the request has some payload we can't process it in this demo
string contentLength;
if (request.Headers.TryGetValue("content-length", out contentLength))
{
await outputStream.WriteAsync(
new ArraySegment <byte>(UpgradeErrorResponse));
await outputStream.CloseAsync();
return;
}
string connectionHeader;
string hostHeader;
string upgradeHeader;
string http2SettingsHeader;
if (!request.Headers.TryGetValue("connection", out connectionHeader) ||
!request.Headers.TryGetValue("host", out hostHeader) ||
!request.Headers.TryGetValue("upgrade", out upgradeHeader) ||
!request.Headers.TryGetValue("http2-settings", out http2SettingsHeader) ||
upgradeHeader != "h2c" ||
http2SettingsHeader.Length == 0)
{
throw new Exception("Invalid upgrade request");
}
var connParts =
connectionHeader
.Split(new char[] { ',' })
.Select(p => p.Trim())
.ToArray();
if (connParts.Length != 2 ||
!connParts.Contains("Upgrade") ||
!connParts.Contains("HTTP2-Settings"))
{
throw new Exception("Invalid upgrade request");
}
var headers = new List <HeaderField>();
headers.Add(new HeaderField {
Name = ":method", Value = request.Method
});
headers.Add(new HeaderField {
Name = ":path", Value = request.Path
});
headers.Add(new HeaderField {
Name = ":scheme", Value = "http"
});
foreach (var kvp in request.Headers)
{
// Skip Connection upgrade related headers
if (kvp.Key == "connection" ||
kvp.Key == "upgrade" ||
kvp.Key == "http2-settings")
{
continue;
}
headers.Add(new HeaderField
{
Name = kvp.Key,
Value = kvp.Value,
});
}
var upgradeBuilder = new ServerUpgradeRequestBuilder();
upgradeBuilder.SetHeaders(headers);
upgradeBuilder.SetHttp2Settings(http2SettingsHeader);
upgrade = upgradeBuilder.Build();
if (!upgrade.IsValid)
{
await outputStream.WriteAsync(
new ArraySegment <byte>(UpgradeErrorResponse));
await outputStream.CloseAsync();
return;
}
// Respond to upgrade
await outputStream.WriteAsync(
new ArraySegment <byte>(UpgradeSuccessResponse));
}
}
catch (Exception e)
{
Console.WriteLine("Error during connection upgrade: {0}", e.Message);
await outputStream.CloseAsync();
return;
}
// Build a HTTP connection on top of the stream abstraction
var http2Con = new Connection(
config, upgradeReadStream, outputStream,
options: new Connection.Options
{
Logger = logProvider.CreateLogger("HTTP2Conn" + connectionId),
ServerUpgradeRequest = upgrade,
});
// Close the connection if we get a GoAway from the client
var remoteGoAwayTask = http2Con.RemoteGoAwayReason;
var closeWhenRemoteGoAway = Task.Run(async() =>
{
await remoteGoAwayTask;
await http2Con.GoAwayAsync(ErrorCode.NoError, true);
});
}
