/// <summary>
/// Http2Client
/// </summary>
/// <param name="host"></param>
/// <param name="ip"></param>
/// <param name="scheme"></param>
/// <param name="path"></param>
/// <param name="authority"></param>
/// <param name="useHttp1Upgrade"></param>
/// <param name="size"></param>
/// <param name="timeOut"></param>
public Http2Client(string host, int ip, string scheme, string path, string authority, bool useHttp1Upgrade = false, int size = 1024, int timeOut = 180 * 1000)
{
_path = path;
_authority = authority;
var options = SocketOptionBuilder.Instance.SetSocket(Sockets.Model.SAEASocketType.Tcp)
.UseStream()
.SetIP(host)
.SetPort(ip)
.SetReadBufferSize(size)
.SetWriteBufferSize(size)
.SetTimeOut(timeOut)
.Build();
_clientSocket = SocketFactory.CreateClientSocket(options);
_clientSocket.ConnectAsync().GetAwaiter();
var config = new ConnectionConfigurationBuilder(false)
.UseSettings(Settings.Default)
.UseHuffmanStrategy(HuffmanStrategy.IfSmaller)
.Build();
var wrappedStreams = _clientSocket.Socket.CreateStreams();
if (useHttp1Upgrade)
{
var upgrade = new ClientUpgradeRequestBuilder()
.SetHttp2Settings(config.Settings)
.Build();
var upgradeReadStream = new UpgradeReadStream(wrappedStreams.ReadableStream);
var needExplicitStreamClose = true;
try
{
var upgradeHeader = "OPTIONS / HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: Upgrade, HTTP2-Settings\r\n" +
"Upgrade: h2c\r\n" +
"HTTP2-Settings: " + upgrade.Base64EncodedSettings + "\r\n\r\n";
var encodedHeader = Encoding.ASCII.GetBytes(upgradeHeader);
wrappedStreams.WriteableStream.WriteAsync(new ArraySegment <byte>(encodedHeader)).GetAwaiter();
upgradeReadStream.WaitForHttpHeader().GetAwaiter();
var headerBytes = upgradeReadStream.HeaderBytes;
upgradeReadStream.ConsumeHttpHeader();
var response = Http1Response.ParseFrom(Encoding.ASCII.GetString(headerBytes.Array, headerBytes.Offset, headerBytes.Count - 4));
if (response.StatusCode != "101")
{
throw new Exception("升级失败");
}
if (!response.Headers.Any(hf => hf.Key == "connection" && hf.Value == "Upgrade") ||
!response.Headers.Any(hf => hf.Key == "upgrade" && hf.Value == "h2c"))
{
throw new Exception("升级失败");
}
needExplicitStreamClose = false;
var conn = new Connection(config, upgradeReadStream, wrappedStreams.WriteableStream, options: new Connection.Options
{
ClientUpgradeRequest = upgrade,
});
var upgradeStream = upgrade.UpgradeRequestStream.GetAwaiter().GetResult();
upgradeStream.Cancel();
_conn = conn;
}
finally
{
if (needExplicitStreamClose)
{
wrappedStreams.WriteableStream.CloseAsync();
}
}
}
else
{
_conn = new Connection(config, wrappedStreams.ReadableStream, wrappedStreams.WriteableStream, options: new Connection.Options());
}
}
async Task <Connection> CreateUpgradeConnection(string host, int port)
{
// HTTP/2 settings
var config =
new ConnectionConfigurationBuilder(false)
.UseSettings(Settings.Default)
.UseHuffmanStrategy(HuffmanStrategy.IfSmaller)
.Build();
// Prepare connection upgrade
var upgrade =
new ClientUpgradeRequestBuilder()
.SetHttp2Settings(config.Settings)
.Build();
// Create a TCP connection
logger.LogInformation($"Starting to connect to {host}:{port}");
var tcpClient = new TcpClient();
await tcpClient.ConnectAsync(host, port);
tcpClient.Client.NoDelay = true;
logger.LogInformation("Connected to remote");
// Create HTTP/2 stream abstraction on top of the socket
var wrappedStreams = tcpClient.Client.CreateStreams();
var upgradeReadStream = new UpgradeReadStream(wrappedStreams.ReadableStream);
var needExplicitStreamClose = true;
try
{
// Send a HTTP/1.1 upgrade request with the necessary fields
var upgradeHeader =
"OPTIONS / HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: Upgrade, HTTP2-Settings\r\n" +
"Upgrade: h2c\r\n" +
"HTTP2-Settings: " + upgrade.Base64EncodedSettings + "\r\n\r\n";
logger.LogInformation("Sending upgrade request:\n" + upgradeHeader);
var encodedHeader = Encoding.ASCII.GetBytes(upgradeHeader);
await wrappedStreams.WriteableStream.WriteAsync(
new ArraySegment <byte>(encodedHeader));
// Wait for the upgrade response
await upgradeReadStream.WaitForHttpHeader();
var headerBytes = upgradeReadStream.HeaderBytes;
logger.LogInformation(
"Received HTTP/1.1 response: " +
Encoding.ASCII.GetString(headerBytes.Array, 0, headerBytes.Count));
// Try to parse the upgrade response as HTTP/1 status and check whether
// the upgrade was successful.
var response = Http1Response.ParseFrom(
Encoding.ASCII.GetString(
headerBytes.Array, headerBytes.Offset, headerBytes.Count - 4));
// Mark the HTTP/1.1 bytes as read
upgradeReadStream.ConsumeHttpHeader();
if (response.StatusCode != "101")
{
throw new Exception("Upgrade failed");
}
if (!response.Headers.Any(hf => hf.Key == "connection" && hf.Value == "Upgrade") ||
!response.Headers.Any(hf => hf.Key == "upgrade" && hf.Value == "h2c"))
{
throw new Exception("Upgrade failed");
}
logger.LogInformation("Connection upgrade succesful!");
// If we get here then the connection will be reponsible for closing
// the stream
needExplicitStreamClose = false;
// Build a HTTP connection on top of the stream abstraction
var connLogger = verbose ? logProvider.CreateLogger("HTTP2Conn") : null;
var conn = new Connection(
config, upgradeReadStream, wrappedStreams.WriteableStream,
options: new Connection.Options
{
Logger = connLogger,
ClientUpgradeRequest = upgrade,
});
// Retrieve the response stream for the connection upgrade.
var upgradeStream = await upgrade.UpgradeRequestStream;
// As we made the upgrade via a dummy OPTIONS request we are not
// really interested in the result of the upgrade request
upgradeStream.Cancel();
return(conn);
}
finally
{
if (needExplicitStreamClose)
{
await wrappedStreams.WriteableStream.CloseAsync();
}
}
}
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);
});
}
