From e5bb4f62a284426de199d68d71900fcbd1285691 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=94=B0=E6=AC=A7?= <thinkerou@gmail.com>
Date: Sun, 12 Aug 2018 21:17:57 +0800
Subject: [PATCH] chore: add return or remove else for reduce indent (#1470)

---
 gin.go         | 69 ++++++++++++++++++++++++++------------------------
 routes_test.go | 10 ++++++++
 2 files changed, 46 insertions(+), 33 deletions(-)

diff --git a/gin.go b/gin.go
index 3ee8018d..fc4d6564 100644
--- a/gin.go
+++ b/gin.go
@@ -349,38 +349,40 @@ func (engine *Engine) handleHTTPRequest(c *Context) {
 	// Find root of the tree for the given HTTP method
 	t := engine.trees
 	for i, tl := 0, len(t); i < tl; i++ {
-		if t[i].method == httpMethod {
-			root := t[i].root
-			// Find route in tree
-			handlers, params, tsr := root.getValue(path, c.Params, unescape)
-			if handlers != nil {
-				c.handlers = handlers
-				c.Params = params
-				c.Next()
-				c.writermem.WriteHeaderNow()
+		if t[i].method != httpMethod {
+			continue
+		}
+		root := t[i].root
+		// Find route in tree
+		handlers, params, tsr := root.getValue(path, c.Params, unescape)
+		if handlers != nil {
+			c.handlers = handlers
+			c.Params = params
+			c.Next()
+			c.writermem.WriteHeaderNow()
+			return
+		}
+		if httpMethod != "CONNECT" && path != "/" {
+			if tsr && engine.RedirectTrailingSlash {
+				redirectTrailingSlash(c)
 				return
 			}
-			if httpMethod != "CONNECT" && path != "/" {
-				if tsr && engine.RedirectTrailingSlash {
-					redirectTrailingSlash(c)
-					return
-				}
-				if engine.RedirectFixedPath && redirectFixedPath(c, root, engine.RedirectFixedPath) {
-					return
-				}
+			if engine.RedirectFixedPath && redirectFixedPath(c, root, engine.RedirectFixedPath) {
+				return
 			}
-			break
 		}
+		break
 	}
 
 	if engine.HandleMethodNotAllowed {
 		for _, tree := range engine.trees {
-			if tree.method != httpMethod {
-				if handlers, _, _ := tree.root.getValue(path, nil, unescape); handlers != nil {
-					c.handlers = engine.allNoMethod
-					serveError(c, http.StatusMethodNotAllowed, default405Body)
-					return
-				}
+			if tree.method == httpMethod {
+				continue
+			}
+			if handlers, _, _ := tree.root.getValue(path, nil, unescape); handlers != nil {
+				c.handlers = engine.allNoMethod
+				serveError(c, http.StatusMethodNotAllowed, default405Body)
+				return
 			}
 		}
 	}
@@ -393,14 +395,16 @@ var mimePlain = []string{MIMEPlain}
 func serveError(c *Context, code int, defaultMessage []byte) {
 	c.writermem.status = code
 	c.Next()
-	if !c.writermem.Written() {
-		if c.writermem.Status() == code {
-			c.writermem.Header()["Content-Type"] = mimePlain
-			c.Writer.Write(defaultMessage)
-		} else {
-			c.writermem.WriteHeaderNow()
-		}
+	if c.writermem.Written() {
+		return
 	}
+	if c.writermem.Status() == code {
+		c.writermem.Header()["Content-Type"] = mimePlain
+		c.Writer.Write(defaultMessage)
+		return
+	}
+	c.writermem.WriteHeaderNow()
+	return
 }
 
 func redirectTrailingSlash(c *Context) {
@@ -411,10 +415,9 @@ func redirectTrailingSlash(c *Context) {
 		code = http.StatusTemporaryRedirect
 	}
 
+	req.URL.Path = path + "/"
 	if length := len(path); length > 1 && path[length-1] == '/' {
 		req.URL.Path = path[:length-1]
-	} else {
-		req.URL.Path = path + "/"
 	}
 	debugPrint("redirecting request %d: %s --> %s", code, path, req.URL.String())
 	http.Redirect(c.Writer, req, req.URL.String(), code)
diff --git a/routes_test.go b/routes_test.go
index 81293907..a2389f9b 100644
--- a/routes_test.go
+++ b/routes_test.go
@@ -333,6 +333,16 @@ func TestRouteNotAllowedEnabled(t *testing.T) {
 	assert.Equal(t, http.StatusTeapot, w.Code)
 }
 
+func TestRouteNotAllowedEnabled2(t *testing.T) {
+	router := New()
+	router.HandleMethodNotAllowed = true
+	// add one methodTree to trees
+	router.addRoute("POST", "/", HandlersChain{func(_ *Context) {}})
+	router.GET("/path2", func(c *Context) {})
+	w := performRequest(router, "POST", "/path2")
+	assert.Equal(t, http.StatusMethodNotAllowed, w.Code)
+}
+
 func TestRouteNotAllowedDisabled(t *testing.T) {
 	router := New()
 	router.HandleMethodNotAllowed = false