TsgcHTTP3Client — an HTTP/3 client (RFC 9114) that sends requests over QUIC with QPACK header compression, Alt-Svc discovery, server push, Extended CONNECT tunnels and WebTransport sessions. The same HTTP semantics you know, on a new transport, in Delphi, C++ Builder and .NET.
Connect to a host and port, then issue requests with the verbs you already use. QPACK, Alt-Svc, push and WebTransport are exposed as methods and events. Built on the native OpenSSL 3.5 QUIC engine.
TsgcHTTP3Client
HTTP/3 (RFC 9114) over QUIC
Delphi, C++ Builder, .NET
Connect to a host and port, then issue requests. The default port is 443. Headers are compressed with QPACK, and OnAltSvc tells you when HTTP/3 is advertised.
uses
sgcHTTP3_Client;
var
oClient: TsgcHTTP3Client;
vBody: string;
begin
oClient := TsgcHTTP3Client.Create(nil);
oClient.OnResponse := OnResponseHandler;
oClient.OnAltSvc := OnAltSvcHandler;
oClient.Connect('www.example.com', 443);
vBody := oClient.Get('https://www.example.com/'); // QPACK-compressed request
oClient.Disconnect;
end;
// WebTransport session over HTTP/3 (RFC 9220):
oClient.WebTransportConnect('https://www.example.com/wt');// includes: sgcHTTP3_Client.hpp
TsgcHTTP3Client *oClient = new TsgcHTTP3Client(NULL);
oClient->OnResponse = OnResponseHandler;
oClient->OnAltSvc = OnAltSvcHandler;
oClient->Connect("www.example.com", 443);
String vBody = oClient->Get("https://www.example.com/"); // QPACK-compressed request
oClient->Disconnect();
// WebTransport session over HTTP/3 (RFC 9220):
oClient->WebTransportConnect("https://www.example.com/wt");using esegece.sgcWebSockets;
var oClient = new TsgcHTTP3Client();
oClient.OnResponse += OnResponseHandler;
oClient.OnAltSvc += OnAltSvcHandler;
oClient.Connect("www.example.com", 443);
var vBody = oClient.Get("https://www.example.com/"); // QPACK-compressed request
oClient.Disconnect();
// WebTransport session over HTTP/3 (RFC 9220):
oClient.WebTransportConnect("https://www.example.com/wt");The members you reach for most often.
Get, Head, Post, Put, Delete and the other verbs (including the IETF QUERY method) run as blocking calls, most with an asynchronous variant.
Connect(aHost, aPort) and Disconnect open and close the QUIC connection; Host and Port report the current target.
OnAltSvc surfaces HTTP/3 availability; SetMaxPushId, OnPushPromise and OnPush control server push.
ExtendedConnect, TunnelSend and OnTunnelData drive RFC 9220 tunnels; WebTransportConnect opens a WebTransport session.
UserAgent, ConnectTimeout, ReadTimeout and MaxResponseSize tune the client.
OnResponse, OnError, OnConnect, OnDisconnect and OnGoAway report responses and the connection lifecycle.
| Online HelpFull API reference and usage guide for sgcQUIC. | Open | |
| All sgcQUIC ComponentsBrowse the full feature matrix of all four components. | Open | |
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