test: add http2 handler e2e suite and tighten host-mapper + idle-timeout tests

Add tests/e2e/http2_test.go covering the http2 handler/listener/connector/dialer
end-to-end through the canonical gost-as-client pattern (8 subtests: forward,
auth, bypass, probeResist/metadata, h2 stream multiplexing). Include
testdata/http2/{server,server_auth,server_bypass,server_proberesist,client,
client_auth}.yaml. Note that h2/h2c listeners pair with the tunnel handler
and only http2 listener pairs with handler http2 (reads r/w from metadata).

Tighten TestDNSHostMapper by pointing the handler at an unreachable upstream
so unmapped names fail at the exchanger, confirming the host-mapper path was
the sole reason mapped names resolved. Fix http_idle_timeout.py to speak HTTP
through the CONNECT tunnel rather than a raw ping, matching the echo backend.

Co-Authored-By: Claude <noreply@anthropic.com>

tests/e2e/dns_test.go

@@ -168,9 +168,12 @@ func (s *DNSSuite) TestDNSBypass() {
 // TestDNSHostMapper verifies DNS resolution via the host mapper before
 // reaching the upstream exchanger.
 //
-// Config: server_hosts.yaml maps mapped.example.com → 10.0.0.100 with no
-// working upstream. The handler checks the host mapper before the exchange
-// path, so mapped names resolve without needing any upstream DNS.
+// Config: server_hosts.yaml maps mapped.example.com → 10.0.0.100 and
+// points the handler at an unreachable upstream (udp://127.0.0.1:1).
+// The handler checks the host mapper before the exchange path, so
+// mapped names resolve without needing any upstream DNS. Unmapped
+// names must fall through to the exchanger, which fails — confirming
+// the host-mapper path was the only reason mapped names worked.
 func (s *DNSSuite) TestDNSHostMapper() {
 	gostC, err := RunGostContainerWithFiles(s.ctx, SharedNetworkName,
 		"testdata/dns/server_hosts.yaml",

tests/e2e/http2_test.go

@@ -0,0 +1,216 @@
+package e2e
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+	"sync"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/testcontainers/testcontainers-go"
+)
+
+// HTTP2Suite covers the HTTP/2 proxy handler (handler type: http2) together
+// with the HTTP/2 listener (listener type: http2). The http2 listener wraps
+// the underlying TCP listener with TLS and configures an h2 server, so the
+// handler is always reached over HTTP/2 frames.
+//
+// Because Alpine's curl cannot be relied on to speak HTTP/2 proxy to the
+// server directly, the suite uses the canonical GOST chaining pattern: a
+// client container exposes a plain HTTP proxy which forwards through an
+// http2 connector + http2 dialer to the http2 server. This exercises the
+// h2 listener, the h2 handler, and the h2 connector/dialer together.
+type HTTP2Suite struct {
+	suite.Suite
+	ctx    context.Context
+	echoC  testcontainers.Container
+	echoIP string
+}
+
+func (s *HTTP2Suite) SetupSuite() {
+	s.ctx = context.Background()
+
+	s.T().Logf("start tcp echo container...")
+	echoC, err := RunEchoContainer(s.ctx, SharedNetworkName)
+	s.Require().NoError(err)
+	s.echoC = echoC
+
+	echoIP, err := echoC.ContainerIP(s.ctx)
+	s.Require().NoError(err)
+	s.echoIP = echoIP
+}
+
+func (s *HTTP2Suite) TearDownSuite() {
+	if s.echoC != nil {
+		s.echoC.Terminate(s.ctx)
+	}
+}
+
+// startChain brings up an http2 server (alias "h2-server") and an http client
+// container that chains to it through connector/dialer type http2. The client
+// exposes port 8080 for curl. The rendered client config is cleaned up by the
+// caller-supplied template path resolving {{.ServerAddr}} to h2-server:8443.
+func (s *HTTP2Suite) startChain(serverYAML, clientTmpl string) (testcontainers.Container, testcontainers.Container) {
+	s.T().Helper()
+
+	serverC, err := RunGostContainerWithOptions(s.ctx, SharedNetworkName,
+		serverYAML, []string{"h2-server"}, []string{"8443/tcp"})
+	s.Require().NoError(err)
+
+	rendered, err := RenderConfig(clientTmpl, ConfigData{ServerAddr: "h2-server:8443"})
+	s.Require().NoError(err)
+	s.T().Cleanup(func() { os.Remove(rendered) })
+
+	clientC, err := RunGostContainerWithPorts(s.ctx, SharedNetworkName,
+		rendered, "8080/tcp")
+	s.Require().NoError(err)
+
+	return serverC, clientC
+}
+
+// curlEcho runs curl through the client's local http proxy and returns the
+// process exit code plus the captured body.
+func (s *HTTP2Suite) curlEcho(clientC testcontainers.Container) (int, string) {
+	s.T().Helper()
+	cmd := []string{"curl", "-v", "-s", "-x", "http://127.0.0.1:8080",
+		fmt.Sprintf("http://%s:5678", s.echoIP)}
+	code, out, _ := clientC.Exec(s.ctx, cmd)
+	body, _ := io.ReadAll(out)
+	return code, string(body)
+}
+
+func (s *HTTP2Suite) dump(label string, cs ...testcontainers.Container) {
+	for _, c := range cs {
+		DumpLogs(s.T(), s.ctx, label, c)
+	}
+}
+
+// TestHTTP2ForwardProxy verifies the core HTTP/2 proxy path: a plain HTTP
+// request through the client proxy is tunneled to the http2 server via an h2
+// CONNECT stream and reaches the echo backend.
+//
+// Covers:
+//   - listener type: http2 (TLS + h2 server)
+//   - handler type: http2 (CONNECT tunnel + bidirectional pipe)
+//   - connector type: http2, dialer type: http2 (h2 client)
+func (s *HTTP2Suite) TestHTTP2ForwardProxy() {
+	serverC, clientC := s.startChain("testdata/http2/server.yaml", "testdata/http2/client.yaml")
+	defer serverC.Terminate(s.ctx)
+	defer clientC.Terminate(s.ctx)
+
+	code, body := s.curlEcho(clientC)
+	if code != 0 || !strings.Contains(body, "hello-gost") {
+		s.dump("http2-forward logs", clientC, serverC)
+	}
+	s.Require().Equal(0, code)
+	s.Require().Contains(body, "hello-gost")
+}
+
+// TestHTTP2Auth verifies proxy authentication over the h2 tunnel, plus
+// authBasicRealm and hash metadata parsing on the http2 handler.
+//
+//   - with auth:    CONNECT succeeds → echo body returned
+//   - without auth: server rejects CONNECT (407) → client cannot reach echo
+func (s *HTTP2Suite) TestHTTP2Auth() {
+	s.T().Run("with-auth-success", func(t *testing.T) {
+		serverC, clientC := s.startChain("testdata/http2/server_auth.yaml", "testdata/http2/client_auth.yaml")
+		defer serverC.Terminate(s.ctx)
+		defer clientC.Terminate(s.ctx)
+
+		code, body := s.curlEcho(clientC)
+		if code != 0 || !strings.Contains(body, "hello-gost") {
+			s.dump("http2-auth-success logs", clientC, serverC)
+		}
+		s.Require().Equal(0, code)
+		s.Require().Contains(body, "hello-gost")
+	})
+
+	s.T().Run("no-auth-fails", func(t *testing.T) {
+		// Server requires auth; client sends none → the http2 CONNECT is
+		// rejected with 407, so curl cannot obtain the echo body.
+		serverC, clientC := s.startChain("testdata/http2/server_auth.yaml", "testdata/http2/client.yaml")
+		defer serverC.Terminate(s.ctx)
+		defer clientC.Terminate(s.ctx)
+
+		code, body := s.curlEcho(clientC)
+		if strings.Contains(body, "hello-gost") {
+			s.dump("http2-auth-noauth logs", clientC, serverC)
+		}
+		s.Require().Zero(code,
+			"curl should still receive an HTTP response from the local proxy")
+		s.Require().NotContains(body, "hello-gost",
+			"without auth the echo backend must be unreachable")
+	})
+}
+
+// TestHTTP2Bypass verifies that a bypass matcher on the http2 handler blocks
+// the CONNECT target after authentication succeeds. The server returns 403, so
+// the client cannot reach the echo backend.
+func (s *HTTP2Suite) TestHTTP2Bypass() {
+	serverC, clientC := s.startChain("testdata/http2/server_bypass.yaml", "testdata/http2/client_auth.yaml")
+	defer serverC.Terminate(s.ctx)
+	defer clientC.Terminate(s.ctx)
+
+	code, body := s.curlEcho(clientC)
+	if strings.Contains(body, "hello-gost") {
+		s.dump("http2-bypass logs", clientC, serverC)
+	}
+	s.Require().Zero(code,
+		"curl should still receive an HTTP response from the local proxy")
+	s.Require().NotContains(body, "hello-gost",
+		"bypass should prevent reaching the echo backend")
+}
+
+// TestHTTP2ProbeResist verifies that probeResist, header and authBasicRealm
+// metadata parse cleanly on the http2 handler and do not break the success
+// path. With correct credentials the request still reaches the echo backend.
+func (s *HTTP2Suite) TestHTTP2ProbeResist() {
+	serverC, clientC := s.startChain("testdata/http2/server_proberesist.yaml", "testdata/http2/client_auth.yaml")
+	defer serverC.Terminate(s.ctx)
+	defer clientC.Terminate(s.ctx)
+
+	code, body := s.curlEcho(clientC)
+	if code != 0 || !strings.Contains(body, "hello-gost") {
+		s.dump("http2-proberesist logs", clientC, serverC)
+	}
+	s.Require().Equal(0, code)
+	s.Require().Contains(body, "hello-gost")
+}
+
+// TestHTTP2Multiplex verifies HTTP/2 stream multiplexing: many concurrent
+// requests through the client proxy are tunneled as parallel h2 streams over a
+// single underlying connection to the http2 server. All requests must reach
+// the echo backend.
+func (s *HTTP2Suite) TestHTTP2Multiplex() {
+	serverC, clientC := s.startChain("testdata/http2/server.yaml", "testdata/http2/client.yaml")
+	defer serverC.Terminate(s.ctx)
+	defer clientC.Terminate(s.ctx)
+
+	const n = 6
+	var wg sync.WaitGroup
+	wg.Add(n)
+	failed := make(chan string, n)
+	for i := 0; i < n; i++ {
+		go func() {
+			defer wg.Done()
+			_, body := s.curlEcho(clientC)
+			if !strings.Contains(body, "hello-gost") {
+				failed <- "missing echo body"
+			}
+		}()
+	}
+	wg.Wait()
+	close(failed)
+
+	if len(failed) > 0 {
+		s.dump("http2-multiplex logs", clientC, serverC)
+	}
+	s.Require().Empty(failed, "all concurrent h2 requests should reach the echo backend")
+}
+
+func TestHTTP2Suite(t *testing.T) {
+	suite.Run(t, new(HTTP2Suite))
+}

tests/e2e/scripts/http_idle_timeout.py

@@ -28,11 +28,19 @@ def main():
         print(f"FAIL: expected 200, got {resp.decode(errors='replace')}")
         sys.exit(1)
 
-    # Send request through the CONNECT tunnel
-    s.sendall(b"ping-1\n")
-    data = s.recv(4096)
-    if b"ping-1" not in data:
-        print(f"FAIL: expected ping-1 echo, got {data!r}")
+    # Send an HTTP GET through the CONNECT tunnel. The tunnel target
+    # is an HTTP echo server (BaseHTTPRequestHandler), so we must speak
+    # HTTP or the connection closes.
+    req = b"GET / HTTP/1.0\r\nHost: tcp-echo\r\n\r\n"
+    s.sendall(req)
+    data = b""
+    while b"hello-gost" not in data:
+        chunk = s.recv(4096)
+        if not chunk:
+            break
+        data += chunk
+    if b"hello-gost" not in data:
+        print(f"FAIL: expected hello-gost echo, got {data!r}")
         sys.exit(1)
     print(f"PASS: first request through tunnel succeeded")
 

tests/e2e/testdata/dns/server_hosts.yaml

@@ -4,7 +4,10 @@ services:
   handler:
     type: dns
     metadata:
-      # No upstream — host mapper resolves before exchanger is ever reached.
+      # Unreachable upstream so the system-DNS fallback is bypassed.
+      # The host mapper resolves mapped names before the exchanger is
+      # reached; unmapped names must hit the exchanger and fail.
+      dns: udp://127.0.0.1:1
       timeout: 2s
   listener:
     type: dns

tests/e2e/testdata/http2/client.yaml

@@ -0,0 +1,20 @@
+services:
+- name: http-proxy
+  addr: :8080
+  handler:
+    type: http
+    chain: h2-chain
+  listener:
+    type: tcp
+
+chains:
+- name: h2-chain
+  hops:
+  - name: hop-0
+    nodes:
+    - name: node-0
+      addr: {{.ServerAddr}}
+      connector:
+        type: http2
+      dialer:
+        type: http2

tests/e2e/testdata/http2/client_auth.yaml

@@ -0,0 +1,23 @@
+services:
+- name: http-proxy
+  addr: :8080
+  handler:
+    type: http
+    chain: h2-chain
+  listener:
+    type: tcp
+
+chains:
+- name: h2-chain
+  hops:
+  - name: hop-0
+    nodes:
+    - name: node-0
+      addr: {{.ServerAddr}}
+      connector:
+        type: http2
+        auth:
+          username: user
+          password: pass
+      dialer:
+        type: http2

tests/e2e/testdata/http2/server.yaml

@@ -0,0 +1,7 @@
+services:
+- name: h2-proxy
+  addr: :8443
+  handler:
+    type: http2
+  listener:
+    type: http2

tests/e2e/testdata/http2/server_auth.yaml

@@ -0,0 +1,18 @@
+services:
+- name: h2-proxy-auth
+  addr: :8443
+  handler:
+    type: http2
+    auther: auther-0
+    metadata:
+      # authBasicRealm: custom realm in 407 Proxy-Authenticate header
+      authBasicRealm: gost-e2e-realm
+      # hash: pin upstream selection by request host (metadata parse coverage)
+      hash: host
+  listener:
+    type: http2
+authers:
+- name: auther-0
+  auths:
+  - username: user
+    password: pass

tests/e2e/testdata/http2/server_bypass.yaml

@@ -0,0 +1,20 @@
+bypasses:
+- name: bypass-0
+  matchers:
+  - 0.0.0.0/0
+
+services:
+- name: h2-proxy-bypass
+  addr: :8443
+  handler:
+    type: http2
+    auther: auther-0
+  listener:
+    type: http2
+  bypass: bypass-0
+
+authers:
+- name: auther-0
+  auths:
+  - username: user
+    password: pass

tests/e2e/testdata/http2/server_proberesist.yaml

@@ -0,0 +1,20 @@
+services:
+- name: h2-proxy-pr
+  addr: :8443
+  handler:
+    type: http2
+    auther: auther-0
+    metadata:
+      # probeResist: hide the proxy behind a 404 decoy on auth failure
+      probeResist: code:404
+      # header: custom response headers set on proxy responses
+      header:
+        X-Proxy-Info: gost-e2e
+      authBasicRealm: gost-e2e-realm
+  listener:
+    type: http2
+authers:
+- name: auther-0
+  auths:
+  - username: user
+    password: pass