wavelet init

Wavelet/pkg/httppool/httppool.go

@@ -0,0 +1,66 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+// Package httppool manages shared, optimized HTTP transports to reuse TCP connections.
+package httppool
+
+import (
+	"crypto/tls"
+	"net"
+	"net/http"
+	"sync"
+	"time"
+
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+)
+
+const (
+	dialTimeout           = 30 * time.Second
+	dialKeepAlive         = 30 * time.Second
+	maxIdleConns          = 200
+	maxIdleConnsPerHost   = 32
+	idleConnTimeout       = 90 * time.Second
+	tlsHandshakeTimeout   = 10 * time.Second
+	expectContinueTimeout = 1 * time.Second
+	tlsSessionCacheSize   = 100
+)
+
+var (
+	defaultTransport http.RoundTripper
+	once             sync.Once
+)
+
+// DefaultTransport returns a globally shared, optimized http.RoundTripper
+// with OTel instrumentation. It maintains a pool of idle TCP connections
+// across hosts.
+func DefaultTransport() http.RoundTripper {
+	once.Do(func() {
+		transport := &http.Transport{
+			Proxy: http.ProxyFromEnvironment,
+			DialContext: (&net.Dialer{
+				Timeout:   dialTimeout,
+				KeepAlive: dialKeepAlive,
+			}).DialContext,
+			ForceAttemptHTTP2:     true,
+			MaxIdleConns:          maxIdleConns,
+			MaxIdleConnsPerHost:   maxIdleConnsPerHost,
+			IdleConnTimeout:       idleConnTimeout,
+			TLSHandshakeTimeout:   tlsHandshakeTimeout,
+			ExpectContinueTimeout: expectContinueTimeout,
+			TLSClientConfig: &tls.Config{
+				ClientSessionCache: tls.NewLRUClientSessionCache(tlsSessionCacheSize),
+			},
+		}
+		defaultTransport = otelhttp.NewTransport(transport)
+	})
+	return defaultTransport
+}
+
+// NewClient returns a new http.Client that shares the global connection pool
+// but has its own timeout configuration.
+func NewClient(timeout time.Duration) *http.Client {
+	return &http.Client{
+		Timeout:   timeout,
+		Transport: DefaultTransport(),
+	}
+}

Wavelet/pkg/httppool/httppool_test.go

@@ -0,0 +1,37 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package httppool
+
+import (
+	"testing"
+	"time"
+)
+
+func TestDefaultTransport(t *testing.T) {
+	tr1 := DefaultTransport()
+	if tr1 == nil {
+		t.Fatal("DefaultTransport() returned nil")
+	}
+
+	tr2 := DefaultTransport()
+	if tr1 != tr2 {
+		t.Error("DefaultTransport() did not return a singleton instance")
+	}
+}
+
+func TestNewClient(t *testing.T) {
+	timeout := 15 * time.Second
+	client := NewClient(timeout)
+	if client == nil {
+		t.Fatal("NewClient() returned nil")
+	}
+
+	if client.Timeout != timeout {
+		t.Errorf("NewClient() timeout = %v, want %v", client.Timeout, timeout)
+	}
+
+	if client.Transport != DefaultTransport() {
+		t.Error("NewClient() is not configured with the default transport")
+	}
+}