diff --git a/internal/util/pht/client.go b/internal/util/pht/client.go
index 2e590f0..c201475 100644
--- a/internal/util/pht/client.go
+++ b/internal/util/pht/client.go
@@ -77,6 +77,8 @@ func (c *Client) authorize(ctx context.Context, addr string) (token string, err
 	if c.Logger.IsLevelEnabled(logger.TraceLevel) {
 		dump, _ := httputil.DumpRequest(r, false)
 		c.Logger.Trace(string(dump))
+	} else if c.Logger.IsLevelEnabled(logger.DebugLevel) {
+		c.Logger.Debugf("%s %s", r.Method, r.URL)
 	}
 
 	resp, err := c.Client.Do(r)
diff --git a/internal/util/pht/conn.go b/internal/util/pht/conn.go
index fdd2502..7202850 100644
--- a/internal/util/pht/conn.go
+++ b/internal/util/pht/conn.go
@@ -5,9 +5,11 @@ import (
 	"bytes"
 	"encoding/base64"
 	"errors"
+	"io"
 	"net"
 	"net/http"
 	"net/http/httputil"
+	"sync"
 	"time"
 
 	"github.com/go-gost/core/logger"
@@ -20,6 +22,7 @@ type clientConn struct {
 	buf        []byte
 	rxc        chan []byte
 	closed     chan struct{}
+	mu         sync.Mutex
 	localAddr  net.Addr
 	remoteAddr net.Addr
 	logger     logger.Logger
@@ -30,7 +33,7 @@ func (c *clientConn) Read(b []byte) (n int, err error) {
 		select {
 		case c.buf = <-c.rxc:
 		case <-c.closed:
-			err = net.ErrClosed
+			err = io.ErrClosedPipe
 			return
 		}
 	}
@@ -45,21 +48,35 @@ func (c *clientConn) Write(b []byte) (n int, err error) {
 	if len(b) == 0 {
 		return
 	}
+	return c.write(b)
+}
 
-	buf := bytes.NewBufferString(base64.StdEncoding.EncodeToString(b))
-	buf.WriteByte('\n')
+func (c *clientConn) write(b []byte) (n int, err error) {
+	if c.isClosed() {
+		err = io.ErrClosedPipe
+		return
+	}
 
-	r, err := http.NewRequest(http.MethodPost, c.pushURL, buf)
+	var r io.Reader
+	if len(b) > 0 {
+		buf := bytes.NewBufferString(base64.StdEncoding.EncodeToString(b))
+		buf.WriteByte('\n')
+		r = buf
+	}
+
+	req, err := http.NewRequest(http.MethodPost, c.pushURL, r)
 	if err != nil {
 		return
 	}
 
 	if c.logger.IsLevelEnabled(logger.TraceLevel) {
-		dump, _ := httputil.DumpRequest(r, false)
+		dump, _ := httputil.DumpRequest(req, false)
 		c.logger.Trace(string(dump))
+	} else if c.logger.IsLevelEnabled(logger.DebugLevel) {
+		c.logger.Debugf("%s %s", req.Method, req.URL)
 	}
 
-	resp, err := c.client.Do(r)
+	resp, err := c.client.Do(req)
 	if err != nil {
 		return
 	}
@@ -80,9 +97,12 @@ func (c *clientConn) Write(b []byte) (n int, err error) {
 }
 
 func (c *clientConn) readLoop() {
-	defer c.Close()
-
 	for {
+		if c.isClosed() {
+			return
+		}
+
+		done := true
 		err := func() error {
 			r, err := http.NewRequest(http.MethodGet, c.pullURL, nil)
 			if err != nil {
@@ -92,6 +112,8 @@ func (c *clientConn) readLoop() {
 			if c.logger.IsLevelEnabled(logger.TraceLevel) {
 				dump, _ := httputil.DumpRequest(r, false)
 				c.logger.Trace(string(dump))
+			} else if c.logger.IsLevelEnabled(logger.DebugLevel) {
+				c.logger.Debugf("%s %s", r.Method, r.URL)
 			}
 
 			resp, err := c.client.Do(r)
@@ -111,6 +133,11 @@ func (c *clientConn) readLoop() {
 
 			scanner := bufio.NewScanner(resp.Body)
 			for scanner.Scan() {
+				done = false
+				if scanner.Text() == "" {
+					continue
+				}
+
 				b, err := base64.StdEncoding.DecodeString(scanner.Text())
 				if err != nil {
 					return err
@@ -121,12 +148,15 @@ func (c *clientConn) readLoop() {
 					return net.ErrClosed
 				}
 			}
-
 			return scanner.Err()
 		}()
 
 		if err != nil {
-			c.logger.Error(err)
+			c.Close()
+			return
+		}
+
+		if done { // server connection closed
 			return
 		}
 	}
@@ -141,12 +171,32 @@ func (c *clientConn) RemoteAddr() net.Addr {
 }
 
 func (c *clientConn) Close() error {
+	c.mu.Lock()
+
 	select {
 	case <-c.closed:
+		c.mu.Unlock()
+		return nil
 	default:
 		close(c.closed)
 	}
-	return nil
+
+	c.mu.Unlock()
+
+	_, err := c.write(nil)
+
+	return err
+}
+
+func (c *clientConn) isClosed() bool {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	select {
+	case <-c.closed:
+		return true
+	default:
+	}
+	return false
 }
 
 func (c *clientConn) SetReadDeadline(t time.Time) error {
diff --git a/internal/util/pht/server.go b/internal/util/pht/server.go
index edde7ce..3394a69 100644
--- a/internal/util/pht/server.go
+++ b/internal/util/pht/server.go
@@ -6,6 +6,7 @@ import (
 	"encoding/base64"
 	"errors"
 	"fmt"
+	"io"
 	"net"
 	"net/http"
 	"net/http/httputil"
@@ -23,17 +24,21 @@ import (
 )
 
 const (
-	defaultBacklog = 128
+	defaultBacklog        = 128
+	defaultReadBufferSize = 32 * 1024
+	defaultReadTimeout    = 10 * time.Second
 )
 
 type serverOptions struct {
-	authorizePath string
-	pushPath      string
-	pullPath      string
-	backlog       int
-	tlsEnabled    bool
-	tlsConfig     *tls.Config
-	logger        logger.Logger
+	authorizePath  string
+	pushPath       string
+	pullPath       string
+	backlog        int
+	tlsEnabled     bool
+	tlsConfig      *tls.Config
+	readBufferSize int
+	readTimeout    time.Duration
+	logger         logger.Logger
 }
 
 type ServerOption func(opts *serverOptions)
@@ -64,6 +69,18 @@ func EnableTLSServerOption(enable bool) ServerOption {
 	}
 }
 
+func ReadBufferSizeServerOption(n int) ServerOption {
+	return func(opts *serverOptions) {
+		opts.readBufferSize = n
+	}
+}
+
+func ReadTimeoutServerOption(timeout time.Duration) ServerOption {
+	return func(opts *serverOptions) {
+		opts.readTimeout = timeout
+	}
+}
+
 func LoggerServerOption(logger logger.Logger) ServerOption {
 	return func(opts *serverOptions) {
 		opts.logger = logger
@@ -90,6 +107,12 @@ func NewServer(addr string, opts ...ServerOption) *Server {
 	if options.backlog <= 0 {
 		options.backlog = defaultBacklog
 	}
+	if options.readBufferSize <= 0 {
+		options.readBufferSize = defaultReadBufferSize
+	}
+	if options.readTimeout <= 0 {
+		options.readTimeout = defaultReadTimeout
+	}
 
 	s := &Server{
 		httpServer: &http.Server{
@@ -118,6 +141,12 @@ func NewHTTP3Server(addr string, quicConfig *quic.Config, opts ...ServerOption)
 	if options.backlog <= 0 {
 		options.backlog = defaultBacklog
 	}
+	if options.readBufferSize <= 0 {
+		options.readBufferSize = defaultReadBufferSize
+	}
+	if options.readTimeout <= 0 {
+		options.readTimeout = defaultReadTimeout
+	}
 
 	s := &Server{
 		http3Server: &http3.Server{
@@ -200,6 +229,8 @@ func (s *Server) handleAuthorize(w http.ResponseWriter, r *http.Request) {
 	if s.options.logger.IsLevelEnabled(logger.TraceLevel) {
 		dump, _ := httputil.DumpRequest(r, false)
 		s.options.logger.Trace(string(dump))
+	} else if s.options.logger.IsLevelEnabled(logger.DebugLevel) {
+		s.options.logger.Debugf("%s %s", r.Method, r.RequestURI)
 	}
 
 	raddr, _ := net.ResolveTCPAddr("tcp", r.RemoteAddr)
@@ -234,6 +265,8 @@ func (s *Server) handlePush(w http.ResponseWriter, r *http.Request) {
 	if s.options.logger.IsLevelEnabled(logger.TraceLevel) {
 		dump, _ := httputil.DumpRequest(r, false)
 		s.options.logger.Trace(string(dump))
+	} else if s.options.logger.IsLevelEnabled(logger.DebugLevel) {
+		s.options.logger.Debugf("%s %s", r.Method, r.RequestURI)
 	}
 
 	if r.Method != http.MethodPost {
@@ -257,10 +290,12 @@ func (s *Server) handlePush(w http.ResponseWriter, r *http.Request) {
 	br := bufio.NewReader(r.Body)
 	data, err := br.ReadString('\n')
 	if err != nil {
-		s.options.logger.Error(err)
+		if err != io.EOF {
+			s.options.logger.Error(err)
+			w.WriteHeader(http.StatusPartialContent)
+		}
 		conn.Close()
 		s.conns.Delete(cid)
-		w.WriteHeader(http.StatusBadRequest)
 		return
 	}
 
@@ -293,6 +328,8 @@ func (s *Server) handlePull(w http.ResponseWriter, r *http.Request) {
 	if s.options.logger.IsLevelEnabled(logger.TraceLevel) {
 		dump, _ := httputil.DumpRequest(r, false)
 		s.options.logger.Trace(string(dump))
+	} else if s.options.logger.IsLevelEnabled(logger.DebugLevel) {
+		s.options.logger.Debugf("%s %s", r.Method, r.RequestURI)
 	}
 
 	if r.Method != http.MethodGet {
@@ -319,32 +356,37 @@ func (s *Server) handlePull(w http.ResponseWriter, r *http.Request) {
 		fw.Flush()
 	}
 
-	b := bufpool.Get(4096)
+	b := bufpool.Get(s.options.readBufferSize)
 	defer bufpool.Put(b)
 
 	for {
-		conn.SetReadDeadline(time.Now().Add(10 * time.Second))
+		conn.SetReadDeadline(time.Now().Add(s.options.readTimeout))
 		n, err := conn.Read(*b)
+		if n > 0 {
+			bw := bufio.NewWriter(w)
+			bw.WriteString(base64.StdEncoding.EncodeToString((*b)[:n]))
+			bw.WriteString("\n")
+			if err := bw.Flush(); err != nil {
+				return
+			}
+			if fw, ok := w.(http.Flusher); ok {
+				fw.Flush()
+			}
+		}
 		if err != nil {
-			if !errors.Is(err, os.ErrDeadlineExceeded) {
-				s.options.logger.Error(err)
+			if errors.Is(err, os.ErrDeadlineExceeded) {
+				(*b)[0] = '\n' // no data
+				w.Write((*b)[:1])
+			} else if errors.Is(err, io.EOF) {
+				// server connection closed
+			} else {
+				if !errors.Is(err, io.ErrClosedPipe) {
+					s.options.logger.Error(err)
+				}
 				s.conns.Delete(cid)
 				conn.Close()
-			} else {
-				(*b)[0] = '\n'
-				w.Write((*b)[:1])
 			}
 			return
 		}
-
-		bw := bufio.NewWriter(w)
-		bw.WriteString(base64.StdEncoding.EncodeToString((*b)[:n]))
-		bw.WriteString("\n")
-		if err := bw.Flush(); err != nil {
-			return
-		}
-		if fw, ok := w.(http.Flusher); ok {
-			fw.Flush()
-		}
 	}
 }