Chore: add some linters and clean up the code

transport/vmess/conn.go

@@ -76,7 +76,7 @@ func (vc *Conn) sendRequest() error {
 
 	p := mathRand.Intn(16)
 	// P Sec Reserve Cmd
-	buf.WriteByte(byte(p<<4) | byte(vc.security))
+	buf.WriteByte(byte(p<<4) | vc.security)
 	buf.WriteByte(0)
 	if vc.dst.UDP {
 		buf.WriteByte(CommandUDP)

transport/vmess/h2.go

@@ -30,7 +30,7 @@ func (hc *h2Conn) establishConn() error {
 	path := hc.cfg.Path
 	// TODO: connect use VMess Host instead of H2 Host
 	req := http.Request{
-		Method: "PUT",
+		Method: http.MethodPut,
 		Host:   host,
 		URL: &url.URL{
 			Scheme: "https",

transport/vmess/http.go

@@ -58,7 +58,7 @@ func (hc *httpConn) Write(b []byte) (int, error) {
 	}
 
 	u := fmt.Sprintf("http://%s%s", host, path)
-	req, _ := http.NewRequest("GET", u, bytes.NewBuffer(b))
+	req, _ := http.NewRequest(http.MethodGet, u, bytes.NewBuffer(b))
 	for key, list := range hc.cfg.Headers {
 		req.Header.Set(key, list[rand.Intn(len(list))])
 	}