diff --git a/context/context.go b/context/context.go
index 89b5ffe4..b60650a8 100644
--- a/context/context.go
+++ b/context/context.go
@@ -155,8 +155,11 @@ func (ctx *Context) CheckXsrfCookie() bool {
 	}
 	if token == "" {
 		ctx.Abort(403, "'_xsrf' argument missing from POST")
-	} else if ctx._xsrf_token != token {
+		return false
+	}
+	if ctx._xsrf_token != token {
 		ctx.Abort(403, "XSRF cookie does not match POST argument")
+		return false
 	}
 	return true
 }
diff --git a/context/input.go b/context/input.go
index d9aa2634..f535e6a2 100644
--- a/context/input.go
+++ b/context/input.go
@@ -72,11 +72,11 @@ func (input *BeegoInput) Site() string {
 func (input *BeegoInput) Scheme() string {
 	if input.Request.URL.Scheme != "" {
 		return input.Request.URL.Scheme
-	} else if input.Request.TLS == nil {
-		return "http"
-	} else {
-		return "https"
 	}
+	if input.Request.TLS == nil {
+		return "http"
+	}
+	return "https"
 }
 
 // Domain returns host name.
diff --git a/httplib/httplib.go b/httplib/httplib.go
index 37ba3b33..7ff2f1d2 100644
--- a/httplib/httplib.go
+++ b/httplib/httplib.go
@@ -253,30 +253,20 @@ func (b *BeegoHttpRequest) Body(data interface{}) *BeegoHttpRequest {
 	return b
 }
 
-func (b *BeegoHttpRequest) getResponse() (*http.Response, error) {
-	if b.resp.StatusCode != 0 {
-		return b.resp, nil
-	}
-	var paramBody string
-	if len(b.params) > 0 {
-		var buf bytes.Buffer
-		for k, v := range b.params {
-			buf.WriteString(url.QueryEscape(k))
-			buf.WriteByte('=')
-			buf.WriteString(url.QueryEscape(v))
-			buf.WriteByte('&')
-		}
-		paramBody = buf.String()
-		paramBody = paramBody[0 : len(paramBody)-1]
-	}
-
+func (b *BeegoHttpRequest) buildUrl(paramBody string) {
+	// build GET url with query string
 	if b.req.Method == "GET" && len(paramBody) > 0 {
 		if strings.Index(b.url, "?") != -1 {
 			b.url += "&" + paramBody
 		} else {
 			b.url = b.url + "?" + paramBody
 		}
-	} else if b.req.Method == "POST" && b.req.Body == nil {
+		return
+	}
+
+	// build POST url and body
+	if b.req.Method == "POST" && b.req.Body == nil {
+		// with files
 		if len(b.files) > 0 {
 			pr, pw := io.Pipe()
 			bodyWriter := multipart.NewWriter(pw)
@@ -305,12 +295,35 @@ func (b *BeegoHttpRequest) getResponse() (*http.Response, error) {
 			}()
 			b.Header("Content-Type", bodyWriter.FormDataContentType())
 			b.req.Body = ioutil.NopCloser(pr)
-		} else if len(paramBody) > 0 {
+			return
+		}
+
+		// with params
+		if len(paramBody) > 0 {
 			b.Header("Content-Type", "application/x-www-form-urlencoded")
 			b.Body(paramBody)
 		}
 	}
+}
 
+func (b *BeegoHttpRequest) getResponse() (*http.Response, error) {
+	if b.resp.StatusCode != 0 {
+		return b.resp, nil
+	}
+	var paramBody string
+	if len(b.params) > 0 {
+		var buf bytes.Buffer
+		for k, v := range b.params {
+			buf.WriteString(url.QueryEscape(k))
+			buf.WriteByte('=')
+			buf.WriteString(url.QueryEscape(v))
+			buf.WriteByte('&')
+		}
+		paramBody = buf.String()
+		paramBody = paramBody[0 : len(paramBody)-1]
+	}
+
+	b.buildUrl(paramBody)
 	url, err := url.Parse(b.url)
 	if err != nil {
 		return nil, err
@@ -342,14 +355,12 @@ func (b *BeegoHttpRequest) getResponse() (*http.Response, error) {
 		}
 	}
 
-	var jar http.CookieJar
+	var jar http.CookieJar = nil
 	if b.setting.EnableCookie {
 		if defaultCookieJar == nil {
 			createDefaultCookie()
 		}
 		jar = defaultCookieJar
-	} else {
-		jar = nil
 	}
 
 	client := &http.Client{
@@ -402,12 +413,11 @@ func (b *BeegoHttpRequest) Bytes() ([]byte, error) {
 		return nil, nil
 	}
 	defer resp.Body.Close()
-	data, err := ioutil.ReadAll(resp.Body)
+	b.body, err = ioutil.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}
-	b.body = data
-	return data, nil
+	return b.body, nil
 }
 
 // ToFile saves the body data in response to one file.
@@ -438,8 +448,7 @@ func (b *BeegoHttpRequest) ToJson(v interface{}) error {
 	if err != nil {
 		return err
 	}
-	err = json.Unmarshal(data, v)
-	return err
+	return json.Unmarshal(data, v)
 }
 
 // ToXml returns the map that marshals from the body bytes as xml in response .
@@ -449,8 +458,7 @@ func (b *BeegoHttpRequest) ToXml(v interface{}) error {
 	if err != nil {
 		return err
 	}
-	err = xml.Unmarshal(data, v)
-	return err
+	return xml.Unmarshal(data, v)
 }
 
 // Response executes request client gets response mannually.
diff --git a/logs/conn.go b/logs/conn.go
index 612634fa..2240eece 100644
--- a/logs/conn.go
+++ b/logs/conn.go
@@ -43,11 +43,7 @@ func NewConn() LoggerInterface {
 // init connection writer with json config.
 // json config only need key "level".
 func (c *ConnWriter) Init(jsonconfig string) error {
-	err := json.Unmarshal([]byte(jsonconfig), c)
-	if err != nil {
-		return err
-	}
-	return nil
+	return json.Unmarshal([]byte(jsonconfig), c)
 }
 
 // write message in connection.
@@ -77,10 +73,9 @@ func (c *ConnWriter) Flush() {
 
 // destroy connection writer and close tcp listener.
 func (c *ConnWriter) Destroy() {
-	if c.innerWriter == nil {
-		return
+	if c.innerWriter != nil {
+		c.innerWriter.Close()
 	}
-	c.innerWriter.Close()
 }
 
 func (c *ConnWriter) connect() error {
diff --git a/logs/console.go b/logs/console.go
index 461291c2..ce7ecd54 100644
--- a/logs/console.go
+++ b/logs/console.go
@@ -50,9 +50,10 @@ type ConsoleWriter struct {
 
 // create ConsoleWriter returning as LoggerInterface.
 func NewConsole() LoggerInterface {
-	cw := new(ConsoleWriter)
-	cw.lg = log.New(os.Stdout, "", log.Ldate|log.Ltime)
-	cw.Level = LevelDebug
+	cw := &ConsoleWriter{
+		lg:    log.New(os.Stdout, "", log.Ldate|log.Ltime),
+		Level: LevelDebug,
+	}
 	return cw
 }
 
@@ -62,11 +63,7 @@ func (c *ConsoleWriter) Init(jsonconfig string) error {
 	if len(jsonconfig) == 0 {
 		return nil
 	}
-	err := json.Unmarshal([]byte(jsonconfig), c)
-	if err != nil {
-		return err
-	}
-	return nil
+	return json.Unmarshal([]byte(jsonconfig), c)
 }
 
 // write message in console.
@@ -76,9 +73,10 @@ func (c *ConsoleWriter) WriteMsg(msg string, level int) error {
 	}
 	if goos := runtime.GOOS; goos == "windows" {
 		c.lg.Println(msg)
-	} else {
-		c.lg.Println(colors[level](msg))
+		return nil
 	}
+	c.lg.Println(colors[level](msg))
+
 	return nil
 }
 
diff --git a/logs/file.go b/logs/file.go
index e237170b..2d3449ce 100644
--- a/logs/file.go
+++ b/logs/file.go
@@ -123,11 +123,7 @@ func (w *FileLogWriter) startLogger() error {
 		return err
 	}
 	w.mw.SetFd(fd)
-	err = w.initFd()
-	if err != nil {
-		return err
-	}
-	return nil
+	return w.initFd()
 }
 
 func (w *FileLogWriter) docheck(size int) {
@@ -170,14 +166,13 @@ func (w *FileLogWriter) initFd() error {
 	}
 	w.maxsize_cursize = int(finfo.Size())
 	w.daily_opendate = time.Now().Day()
+	w.maxlines_curlines = 0
 	if finfo.Size() > 0 {
 		count, err := w.lines()
 		if err != nil {
 			return err
 		}
 		w.maxlines_curlines = count
-	} else {
-		w.maxlines_curlines = 0
 	}
 	return nil
 }
diff --git a/logs/log.go b/logs/log.go
index 6abfb005..32e0187c 100644
--- a/logs/log.go
+++ b/logs/log.go
@@ -292,9 +292,9 @@ func (bl *BeeLogger) Close() {
 					fmt.Println("ERROR, unable to WriteMsg (while closing logger):", err)
 				}
 			}
-		} else {
-			break
+			continue
 		}
+		break
 	}
 	for _, l := range bl.outputs {
 		l.Flush()
diff --git a/logs/smtp.go b/logs/smtp.go
index 19a0f510..95123ebf 100644
--- a/logs/smtp.go
+++ b/logs/smtp.go
@@ -25,7 +25,8 @@ import (
 )
 
 const (
-	subjectPhrase = "Diagnostic message from server"
+// no usage
+// subjectPhrase = "Diagnostic message from server"
 )
 
 // smtpWriter implements LoggerInterface and is used to send emails via given SMTP-server.
@@ -146,9 +147,7 @@ func (s *SmtpWriter) WriteMsg(msg string, level int) error {
 	mailmsg := []byte("To: " + strings.Join(s.RecipientAddresses, ";") + "\r\nFrom: " + s.FromAddress + "<" + s.FromAddress +
 		">\r\nSubject: " + s.Subject + "\r\n" + content_type + "\r\n\r\n" + fmt.Sprintf(".%s", time.Now().Format("2006-01-02 15:04:05")) + msg)
 
-	err := s.sendMail(s.Host, auth, s.FromAddress, s.RecipientAddresses, mailmsg)
-
-	return err
+	return s.sendMail(s.Host, auth, s.FromAddress, s.RecipientAddresses, mailmsg)
 }
 
 // implementing method. empty.
diff --git a/middleware/error.go b/middleware/error.go
index 052e977c..00cf9de5 100644
--- a/middleware/error.go
+++ b/middleware/error.go
@@ -323,17 +323,15 @@ func Exception(errcode string, w http.ResponseWriter, r *http.Request, msg strin
 		w.WriteHeader(isint)
 		h(w, r)
 		return
-	} else {
-		isint, err := strconv.Atoi(errcode)
-		if err != nil {
-			isint = 500
-		}
-		if isint == 404 {
-			msg = "404 page not found"
-		}
-		w.Header().Set("Content-Type", "text/plain; charset=utf-8")
-		w.WriteHeader(isint)
-		fmt.Fprintln(w, msg)
-		return
 	}
+	isint, err := strconv.Atoi(errcode)
+	if err != nil {
+		isint = 500
+	}
+	if isint == 404 {
+		msg = "404 page not found"
+	}
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+	w.WriteHeader(isint)
+	fmt.Fprintln(w, msg)
 }
diff --git a/middleware/i18n.go b/middleware/i18n.go
index e4dab693..f54b4bb5 100644
--- a/middleware/i18n.go
+++ b/middleware/i18n.go
@@ -34,7 +34,6 @@ type Translation struct {
 }
 
 func NewLocale(filepath string, defaultlocal string) *Translation {
-	i18n := make(map[string]map[string]string)
 	file, err := os.Open(filepath)
 	if err != nil {
 		panic("open " + filepath + " err :" + err.Error())
@@ -43,8 +42,9 @@ func NewLocale(filepath string, defaultlocal string) *Translation {
 	if err != nil {
 		panic("read " + filepath + " err :" + err.Error())
 	}
-	err = json.Unmarshal(data, &i18n)
-	if err != nil {
+
+	i18n := make(map[string]map[string]string)
+	if err = json.Unmarshal(data, &i18n); err != nil {
 		panic("json.Unmarshal " + filepath + " err :" + err.Error())
 	}
 	return &Translation{