Integrate experimental HTTP/2 support

examples/http2/dub.sdl

@@ -0,0 +1,7 @@
+name "http2-example"
+
+dependency "vibe-http" path="../../../vibe-http"
+
+/*versions "VibeForceALPN"*/
+targetType "executable"
+/*buildOptions "profileGC"*/

examples/http2/server.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDUjCCAjoCCQDPHygOhe1ZVjANBgkqhkiG9w0BAQUFADBrMQswCQYDVQQGEwJE
+RTEbMBkGA1UECBMSU2NobGVzd2lnLUhvbHN0ZWluMRAwDgYDVQQHFAdMw7xiZWNr
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+4wKngPl6t68pdnli67lX3YDTdHgOZWL+CsJT9TIRAOojfp5kWGY=
+-----END CERTIFICATE-----

examples/http2/server.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEowIBAAKCAQEAuHyz1kUoZavqOrzOZ4VArUfiDZpQJUAszN2rFqUO+k/zDl9Q
+otW68qUYDlwpmCPHOZRRjiDKR9WQIffO7eFHZMFQp++qV7+cmOFNYyeYvb+0eyFH
+ime7rcJatYz6N1loYmcJtaOgMVURxolEOV63F9EYLdG4ff+QVhy5LNzieOJso6YB
+r9ie59S3MnnEQHfrLjeKrAYkyE0AWKtu1mLAwqq1QQaMgj4W+dcU5WjJXAB9npK5
+vPOhZQveVa8Fe6OI2+LERmHXyqk+h8Fytckwd5++Ntlmrw4EY9rzUGi/l6D4gTq0
+GfH4/T3lgsnn0hLas/P3aZyTvqcYnSgKMPALOQIDAQABAoIBABdkiJEk18h8kgi8
+pBdwSBEwyjMbXAo9JvEbMnR+nXWT6afq4hijrT7TPEel3AhUkRB2BBlXgw60v7/u
+4ig7pofaE1YYB6t0unCQMPXfsXht9H6ga6fbG2se982JgLi/94JyukJz6v4WYVih
+UytLHUBB3SUCMLiZTT3+CmTr5TOamtcUi9ZNKtbxT2l+8iDbi7WaCUznrODZ8YMn
+/5RhE3XopBuCmeT8P7EhJSHe1THEcCcXtlChb7bMU7DMpvWYp9XBM4CQ2PpdHN5x
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+DeSX9e4BgvRVDDm8Y2y0Uj7sf/w8cO5Tjzk0Ya5n/cTdB2mv7L9w3OG4IXfPQAI+
+f7EBAoGBAKgvIg/bvF705Lg2bebjR2MVeVySDZP/SjY5my+4cF8VSJOK+8WA1MeJ
+dv4sukGjAMrMApegKmaiIngb2izINfanEd0xn4h1nCwVcRaNr9fSkZDBhi+JErol
+0janntvmByXPD0BXguza7NVJGmtzCyZk+rOHtC1J+qG7kdXHpPYT
+-----END RSA PRIVATE KEY-----

examples/http2/source/app.d

@@ -0,0 +1,100 @@
+/* ==== Vibe.d HTTP/2 Webserver Example ==== */
+/* 	Supports both HTTP and HTTPS transport   */
+/*  Transparent (WIP: exposing settings) 	 */
+/* ========================================= */
+
+import vibe.http.server;
+import vibe.stream.tls;
+import vibe.http.internal.http2.server : http2Callback; // ALPN negotiation
+import vibe.core.core : runApplication;
+
+/* ==== declare two handlers (could use the same one) ==== */
+void handleReq(HTTPServerRequest req, HTTPServerResponse res)
+@safe {
+	if (res.httpVersion == HTTPVersion.HTTP_2)
+		res.writeBody("Hello, you connected to "~req.path~"! This response is sent through HTTP/2\n");
+	else
+		res.writeBody("Hello, World! You connected through HTTP/1, try using HTTP/2!\n");
+}
+
+void tlsHandleReq(HTTPServerRequest req, HTTPServerResponse res)
+@safe {
+	if (req.httpVersion == HTTPVersion.HTTP_2)
+		res.writeBody("Hello, you connected to "~req.path~"! This response is sent through HTTP/2 with TLS\n");
+	else
+		res.writeBody("Hello, World! You connected through HTTP/1 with TLS, try using HTTP/2!\n");
+}
+
+// sends a very big data frame
+void bigHandleReq(size_t DIM)(HTTPServerRequest req, HTTPServerResponse res)
+@trusted {
+	import vibe.container.internal.appender : FixedAppender;
+	import std.range : iota;
+
+	FixedAppender!(immutable(char)[], DIM) appender;
+
+	if (req.path == "/") {
+		foreach(i; iota(1,DIM-4)) appender.put('1');
+		appender.put(['O','k','!', '\n']);
+		res.writeBody(appender.data);
+	}
+}
+
+void main()
+{
+	//import vibe.core.log;
+	//setLogLevel(LogLevel.trace);
+	HTTPListener[] listeners;
+
+/* ==== cleartext HTTP/2 support (h2c) ==== */
+	auto settings = new HTTPServerSettings;
+	settings.port = 8090;
+	settings.bindAddresses = ["127.0.0.1"];
+	settings.options |= HTTPServerOption.enableHTTP2;
+	listeners ~= listenHTTP(settings, &handleReq);
+
+/* ==== cleartext HTTP/2 support (h2c) with a heavy DATA frame ==== */
+	auto bigSettings = new HTTPServerSettings;
+	bigSettings.port = 8092;
+	bigSettings.bindAddresses = ["127.0.0.1"];
+	bigSettings.options |= HTTPServerOption.enableHTTP2;
+	listeners ~= listenHTTP(bigSettings, &bigHandleReq!100000);
+
+/* ========== HTTPS (h2) support ========== */
+	auto tlsSettings = new HTTPServerSettings;
+	tlsSettings.port = 8091;
+	tlsSettings.bindAddresses = ["127.0.0.1"];
+	tlsSettings.options |= HTTPServerOption.enableHTTP2;
+
+	/// setup TLS context by using cert and key in example rootdir
+	tlsSettings.tlsContext = createTLSContext(TLSContextKind.server);
+	tlsSettings.tlsContext.useCertificateChainFile("server.crt");
+	tlsSettings.tlsContext.usePrivateKeyFile("server.key");
+
+	// set alpn callback to support HTTP/2 protocol negotiation
+	tlsSettings.tlsContext.alpnCallback(http2Callback);
+	listeners ~= listenHTTP(tlsSettings, &tlsHandleReq);
+
+/* ========== HTTPS (h2) support with a heavy DATA frame ========== */
+	auto bigTLSSettings = new HTTPServerSettings;
+	bigTLSSettings.port = 8093;
+	bigTLSSettings.bindAddresses = ["127.0.0.1"];
+	bigTLSSettings.options |= HTTPServerOption.enableHTTP2;
+
+	/// setup TLS context by using cert and key in example rootdir
+	bigTLSSettings.tlsContext = createTLSContext(TLSContextKind.server);
+	bigTLSSettings.tlsContext.useCertificateChainFile("server.crt");
+	bigTLSSettings.tlsContext.usePrivateKeyFile("server.key");
+
+	// set alpn callback to support HTTP/2 protocol negotiation
+	bigTLSSettings.tlsContext.alpnCallback(http2Callback);
+	listeners ~= listenHTTP(bigTLSSettings, &bigHandleReq!100000);
+
+	scope(exit)
+		foreach (l; listeners)
+			l.stopListening();
+
+/* ========== Run both `listenHTTP` handlers ========== */
+	// UNCOMMENT to run
+	runApplication();
+}

source/vibe/http/common.d

@@ -34,7 +34,8 @@ import std.uni: asLowerCase, sicmp;
 
 enum HTTPVersion {
 	HTTP_1_0,
-	HTTP_1_1
+	HTTP_1_1,
+	HTTP_2
 }
 
 
@@ -362,6 +363,7 @@ nothrow pure @nogc @safe {
 	final switch(ver){
 		case HTTPVersion.HTTP_1_0: return "HTTP/1.0";
 		case HTTPVersion.HTTP_1_1: return "HTTP/1.1";
+		case HTTPVersion.HTTP_2: return "HTTP/2";
 	}
 }