feat: add plugin

http/http.go

@@ -2,106 +2,19 @@
 package http
 
 import (
-	"context"
-	"crypto/tls"
-	"errors"
 	"io"
-	"net"
 	"net/http"
 	"net/url"
 	"time"
 
-	"github.com/fumiama/terasu"
 	"github.com/fumiama/terasu/dns"
 )
 
-var (
-	// ErrNoTLSConnection is returned when a TLS connection cannot be established.
-	ErrNoTLSConnection = errors.New("no tls connection")
-	// ErrEmptyHostAddress is returned when the host address is empty.
-	ErrEmptyHostAddress = errors.New("empty host addr")
-)
-
-// defaultDialer is the default dialer used for connecting to hosts.
-var defaultDialer = net.Dialer{
-	Timeout: 10 * time.Second,
-}
-
-// SetDefaultClientTimeout sets the default timeout for the client's dialer.
-func SetDefaultClientTimeout(t time.Duration) {
-	defaultDialer.Timeout = t
-}
-
 // DefaultClient is the default HTTP client with custom transport settings, including DNS resolution and TLS handling.
 var DefaultClient = http.Client{
 	Transport: &http.Transport{
-		Proxy: http.ProxyFromEnvironment,
-		DialTLSContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
-			host, port, err := net.SplitHostPort(addr)
-			if err != nil {
-				return nil, err
-			}
-			addrs, err := dns.LookupHost(ctx, host)
-			if err != nil {
-				return nil, err
-			}
-			if len(addrs) == 0 {
-				return nil, ErrEmptyHostAddress
-			}
-			var conn net.Conn
-			var tlsConn *tls.Conn
-			for _, a := range addrs {
-				// Apply timeout if set, otherwise use deadline
-				if defaultDialer.Timeout != 0 {
-					var cancel context.CancelFunc
-					ctx, cancel = context.WithTimeout(context.Background(), defaultDialer.Timeout)
-					defer cancel()
-				} else if !defaultDialer.Deadline.IsZero() {
-					var cancel context.CancelFunc
-					ctx, cancel = context.WithDeadline(context.Background(), defaultDialer.Deadline)
-					defer cancel()
-				}
-				conn, err = defaultDialer.DialContext(ctx, network, net.JoinHostPort(a, port))
-				if err != nil {
-					continue
-				}
-				tlsConn = tls.Client(terasu.NewConn(conn), &tls.Config{
-					ServerName: host,
-					MinVersion: tls.VersionTLS12,
-				})
-				// Re-initialize context due to potential deadline changes from TCP dial
-				if defaultDialer.Timeout != 0 {
-					var cancel context.CancelFunc
-					ctx, cancel = context.WithTimeout(context.Background(), defaultDialer.Timeout)
-					defer cancel()
-				} else if !defaultDialer.Deadline.IsZero() {
-					var cancel context.CancelFunc
-					ctx, cancel = context.WithDeadline(context.Background(), defaultDialer.Deadline)
-					defer cancel()
-				}
-				err = tlsConn.HandshakeContext(ctx)
-				if err == nil {
-					break
-				}
-				_ = tlsConn.Close()
-				tlsConn = nil
-				conn, err = defaultDialer.DialContext(ctx, network, net.JoinHostPort(a, port))
-				if err != nil {
-					continue
-				}
-				tlsConn = tls.Client(terasu.NewConn(conn), &tls.Config{
-					ServerName: host,
-					MinVersion: tls.VersionTLS12,
-				})
-				err = tlsConn.HandshakeContext(ctx)
-				if err == nil {
-					break
-				}
-				_ = tlsConn.Close()
-				tlsConn = nil
-			}
-			return tlsConn, err
-		},
+		Proxy:                 http.ProxyFromEnvironment,
+		DialTLSContext:        dns.DialTLSContext,
 		ForceAttemptHTTP2:     true,
 		MaxIdleConns:          100,
 		IdleConnTimeout:       90 * time.Second,