From a9617c1e4aa5126366bc344e6208ab561d62a742 Mon Sep 17 00:00:00 2001
From: Dustin Xie <dahuaxie@gmail.com>
Date: Thu, 14 Jul 2022 10:03:32 -0700
Subject: [PATCH] [httputil] add ReadHeaderTimeout

---
 api/http.go                        | 15 ++++-----
 pkg/util/httputil/httputil.go      | 51 ++++++++++++++++++++++++------
 pkg/util/httputil/httputil_test.go | 12 +++----
 3 files changed, 53 insertions(+), 25 deletions(-)

diff --git a/api/http.go b/api/http.go
index 66579ba1bd..67e9d8b488 100644
--- a/api/http.go
+++ b/api/http.go
@@ -11,6 +11,7 @@ import (
 
 	apitypes "github.com/iotexproject/iotex-core/api/types"
 	"github.com/iotexproject/iotex-core/pkg/log"
+	"github.com/iotexproject/iotex-core/pkg/util/httputil"
 )
 
 type (
@@ -31,17 +32,13 @@ func NewHTTPServer(route string, port int, handler http.Handler) *HTTPServer {
 	if port == 0 {
 		return nil
 	}
-	svr := &HTTPServer{
-		svr: &http.Server{
-			Addr:              ":" + strconv.Itoa(port),
-			WriteTimeout:      30 * time.Second,
-			ReadHeaderTimeout: 10 * time.Second,
-		},
-	}
 	mux := http.NewServeMux()
 	mux.Handle("/"+route, handler)
-	svr.svr.Handler = mux
-	return svr
+
+	svr := httputil.Server(":"+strconv.Itoa(port), mux, httputil.HeaderTimeout(10*time.Second))
+	return &HTTPServer{
+		svr: &svr,
+	}
 }
 
 // Start starts the http server
diff --git a/pkg/util/httputil/httputil.go b/pkg/util/httputil/httputil.go
index d5dbea833b..58d464e2bb 100644
--- a/pkg/util/httputil/httputil.go
+++ b/pkg/util/httputil/httputil.go
@@ -9,20 +9,51 @@ import (
 )
 
 const (
-	_connectionCount = 400
-	_readTimeout     = 35 * time.Second
-	_writeTimeout    = 35 * time.Second
-	_idleTimeout     = 120 * time.Second
+	_connectionCount   = 400
+	_readHeaderTimeout = 5 * time.Second
+	_readTimeout       = 30 * time.Second
+	_writeTimeout      = 30 * time.Second
+	_idleTimeout       = 120 * time.Second
 )
 
+type (
+	// ServerOption is a server option
+	ServerOption func(*serverConfig)
+
+	serverConfig struct {
+		ReadHeaderTimeout time.Duration
+		ReadTimeout       time.Duration
+		WriteTimeout      time.Duration
+		IdleTimeout       time.Duration
+	}
+)
+
+// HeaderTimeout sets header timeout
+func HeaderTimeout(h time.Duration) ServerOption {
+	return func(cfg *serverConfig) {
+		cfg.ReadHeaderTimeout = h
+	}
+}
+
 // Server creates a HTTP server with time out settings.
-func Server(addr string, handler http.Handler) http.Server {
+func Server(addr string, handler http.Handler, opts ...ServerOption) http.Server {
+	cfg := serverConfig{
+		ReadHeaderTimeout: _readHeaderTimeout,
+		ReadTimeout:       _readTimeout,
+		WriteTimeout:      _writeTimeout,
+		IdleTimeout:       _idleTimeout,
+	}
+	for _, opt := range opts {
+		opt(&cfg)
+	}
+
 	return http.Server{
-		ReadTimeout:  _readTimeout,
-		WriteTimeout: _writeTimeout,
-		IdleTimeout:  _idleTimeout,
-		Addr:         addr,
-		Handler:      handler,
+		ReadHeaderTimeout: cfg.ReadHeaderTimeout,
+		ReadTimeout:       cfg.ReadTimeout,
+		WriteTimeout:      cfg.WriteTimeout,
+		IdleTimeout:       cfg.IdleTimeout,
+		Addr:              addr,
+		Handler:           handler,
 	}
 }
 
diff --git a/pkg/util/httputil/httputil_test.go b/pkg/util/httputil/httputil_test.go
index 29189ed983..edbdf92f4e 100644
--- a/pkg/util/httputil/httputil_test.go
+++ b/pkg/util/httputil/httputil_test.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"net/http"
 	"testing"
-	"time"
 
 	"github.com/stretchr/testify/require"
 )
@@ -15,11 +14,12 @@ func TestServer(t *testing.T) {
 		addr := "myAddress"
 
 		expectValue := http.Server{
-			ReadTimeout:  35 * time.Second,
-			WriteTimeout: 35 * time.Second,
-			IdleTimeout:  120 * time.Second,
-			Addr:         addr,
-			Handler:      handler,
+			ReadHeaderTimeout: _readHeaderTimeout,
+			ReadTimeout:       _readTimeout,
+			WriteTimeout:      _writeTimeout,
+			IdleTimeout:       _idleTimeout,
+			Addr:              addr,
+			Handler:           handler,
 		}
 		result := Server(addr, handler)
 		require.Equal(t, expectValue, result)