diff --git a/README.md b/README.md
index afdb25f..7225b92 100644
--- a/README.md
+++ b/README.md
@@ -13,5 +13,7 @@
 - [x] 忽略某些错误例如：broken pipe, reset by peer, timeout
 - [x] websocket
 - [x] 插件机制
+- [x] 命令行参数控制 dump 至文件
+- [ ] dump level
 - [ ] support get method with body
 - [ ] http2
diff --git a/addon/dumper.go b/addon/dumper.go
new file mode 100644
index 0000000..06d9daa
--- /dev/null
+++ b/addon/dumper.go
@@ -0,0 +1,65 @@
+package addon
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/lqqyt2423/go-mitmproxy/flow"
+)
+
+type Dumper struct {
+	Base
+	Out io.Writer
+}
+
+func NewDumperWithFile(file string) *Dumper {
+	out, err := os.OpenFile(file, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		panic(err)
+	}
+	return &Dumper{Out: out}
+}
+
+func (d *Dumper) Requestheaders(f *flow.Flow) {
+	log := log.WithField("in", "Dumper")
+
+	go func() {
+		<-f.Done()
+
+		// 参考 httputil.DumpRequest
+
+		buf := bytes.NewBuffer(make([]byte, 0))
+		fmt.Fprintf(buf, "%s %s %s\r\n", f.Request.Method, f.Request.URL.RequestURI(), f.Request.Proto)
+		fmt.Fprintf(buf, "Host: %s\r\n", f.Request.URL.Host)
+		if len(f.Request.Raw().TransferEncoding) > 0 {
+			fmt.Fprintf(buf, "Transfer-Encoding: %s\r\n", strings.Join(f.Request.Raw().TransferEncoding, ","))
+		}
+		if f.Request.Raw().Close {
+			fmt.Fprintf(buf, "Connection: close\r\n")
+		}
+
+		err := f.Request.Header.WriteSubset(buf, nil)
+		if err != nil {
+			log.Error(err)
+		}
+		buf.WriteString("\r\n")
+
+		if f.Response != nil {
+			fmt.Fprintf(buf, "%v %v %v\r\n", f.Request.Proto, f.Response.StatusCode, http.StatusText(f.Response.StatusCode))
+			err = f.Response.Header.WriteSubset(buf, nil)
+			if err != nil {
+				log.Error(err)
+			}
+			buf.WriteString("\r\n")
+		}
+
+		_, err = d.Out.Write(buf.Bytes())
+		if err != nil {
+			log.Error(err)
+		}
+	}()
+}
diff --git a/cmd/mitmproxy/main.go b/cmd/mitmproxy/main.go
index f2f96ea..da31d6d 100644
--- a/cmd/mitmproxy/main.go
+++ b/cmd/mitmproxy/main.go
@@ -1,12 +1,29 @@
 package main
 
 import (
+	"flag"
 	"os"
 
+	"github.com/lqqyt2423/go-mitmproxy/addon"
 	"github.com/lqqyt2423/go-mitmproxy/proxy"
 	log "github.com/sirupsen/logrus"
 )
 
+type Config struct {
+	addr string
+	dump string // dump filename
+}
+
+func loadConfig() *Config {
+	config := new(Config)
+
+	flag.StringVar(&config.addr, "addr", ":9080", "proxy listen addr")
+	flag.StringVar(&config.dump, "dump", "", "dump filename")
+	flag.Parse()
+
+	return config
+}
+
 func main() {
 	log.SetLevel(log.InfoLevel)
 	log.SetReportCaller(false)
@@ -15,8 +32,10 @@ func main() {
 		FullTimestamp: true,
 	})
 
+	config := loadConfig()
+
 	opts := &proxy.Options{
-		Addr:              ":9080",
+		Addr:              config.addr,
 		StreamLargeBodies: 1024 * 1024 * 5,
 	}
 
@@ -25,5 +44,10 @@ func main() {
 		log.Fatal(err)
 	}
 
+	if config.dump != "" {
+		dumper := addon.NewDumperWithFile(config.dump)
+		p.AddAddon(dumper)
+	}
+
 	log.Fatal(p.Start())
 }
diff --git a/flow/flow.go b/flow/flow.go
index 2a099a1..a63521a 100644
--- a/flow/flow.go
+++ b/flow/flow.go
@@ -3,18 +3,30 @@ package flow
 import (
 	"net/http"
 	"net/url"
-
-	_log "github.com/sirupsen/logrus"
 )
 
-var log = _log.WithField("at", "flow")
-
 type Request struct {
 	Method string
 	URL    *url.URL
 	Proto  string
 	Header http.Header
 	Body   []byte
+
+	raw *http.Request
+}
+
+func NewRequest(req *http.Request) *Request {
+	return &Request{
+		Method: req.Method,
+		URL:    req.URL,
+		Proto:  req.Proto,
+		Header: req.Header,
+		raw:    req,
+	}
+}
+
+func (r *Request) Raw() *http.Request {
+	return r.raw
 }
 
 type Response struct {
diff --git a/proxy/proxy.go b/proxy/proxy.go
index 7dc43b9..336968b 100644
--- a/proxy/proxy.go
+++ b/proxy/proxy.go
@@ -155,12 +155,7 @@ func (proxy *Proxy) ServeHTTP(res http.ResponseWriter, req *http.Request) {
 	}()
 
 	f := flow.NewFlow()
-	f.Request = &flow.Request{
-		Method: req.Method,
-		URL:    req.URL,
-		Proto:  req.Proto,
-		Header: req.Header,
-	}
+	f.Request = flow.NewRequest(req)
 	defer f.Finish()
 
 	// trigger addon event Requestheaders