diff --git a/context.go b/context.go
index 5063b498..e9735d28 100644
--- a/context.go
+++ b/context.go
@@ -960,7 +960,18 @@ func (c *Context) NegotiateFormat(offered ...string) string {
 	}
 	for _, accepted := range c.Accepted {
 		for _, offert := range offered {
-			if accepted == offert {
+			// According to RFC 2616 and RFC 2396, non-ASCII characters are not allowed in headers,
+			// therefore we can just iterate over the string without casting it into []rune
+			i := 0
+			for ; i < len(accepted); i++ {
+				if accepted[i] == '*' || offert[i] == '*' {
+					return offert
+				}
+				if accepted[i] != offert[i] {
+					break
+				}
+			}
+			if i == len(accepted) {
 				return offert
 			}
 		}
diff --git a/context_test.go b/context_test.go
index 5d28bde6..0da5fbe6 100644
--- a/context_test.go
+++ b/context_test.go
@@ -1171,17 +1171,41 @@ func TestContextNegotiationFormat(t *testing.T) {
 func TestContextNegotiationFormatWithAccept(t *testing.T) {
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	c.Request, _ = http.NewRequest("POST", "/", nil)
-	c.Request.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8")
+	c.Request.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9;q=0.8")
 
 	assert.Equal(t, MIMEXML, c.NegotiateFormat(MIMEJSON, MIMEXML))
 	assert.Equal(t, MIMEHTML, c.NegotiateFormat(MIMEXML, MIMEHTML))
 	assert.Empty(t, c.NegotiateFormat(MIMEJSON))
 }
 
+func TestContextNegotiationFormatWithWildcardAccept(t *testing.T) {
+	c, _ := CreateTestContext(httptest.NewRecorder())
+	c.Request, _ = http.NewRequest("POST", "/", nil)
+	c.Request.Header.Add("Accept", "*/*")
+
+	assert.Equal(t, c.NegotiateFormat("*/*"), "*/*")
+	assert.Equal(t, c.NegotiateFormat("text/*"), "text/*")
+	assert.Equal(t, c.NegotiateFormat("application/*"), "application/*")
+	assert.Equal(t, c.NegotiateFormat(MIMEJSON), MIMEJSON)
+	assert.Equal(t, c.NegotiateFormat(MIMEXML), MIMEXML)
+	assert.Equal(t, c.NegotiateFormat(MIMEHTML), MIMEHTML)
+
+	c, _ = CreateTestContext(httptest.NewRecorder())
+	c.Request, _ = http.NewRequest("POST", "/", nil)
+	c.Request.Header.Add("Accept", "text/*")
+
+	assert.Equal(t, c.NegotiateFormat("*/*"), "*/*")
+	assert.Equal(t, c.NegotiateFormat("text/*"), "text/*")
+	assert.Equal(t, c.NegotiateFormat("application/*"), "")
+	assert.Equal(t, c.NegotiateFormat(MIMEJSON), "")
+	assert.Equal(t, c.NegotiateFormat(MIMEXML), "")
+	assert.Equal(t, c.NegotiateFormat(MIMEHTML), MIMEHTML)
+}
+
 func TestContextNegotiationFormatCustom(t *testing.T) {
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	c.Request, _ = http.NewRequest("POST", "/", nil)
-	c.Request.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8")
+	c.Request.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9;q=0.8")
 
 	c.Accepted = nil
 	c.SetAccepted(MIMEJSON, MIMEXML)
diff --git a/docs/how-to-build-an-effective-middleware.md b/docs/how-to-build-an-effective-middleware.md
deleted file mode 100644
index 568d5720..00000000
--- a/docs/how-to-build-an-effective-middleware.md
+++ /dev/null
@@ -1,137 +0,0 @@
-# How to build one effective middleware?
-
-## Consitituent part
-
-The middleware has two parts:
-
-  - part one is what is executed once, when you initialize your middleware. That's where you set up all the global objects, logicals etc. Everything that happens one per application lifetime.
-
-  - part two is what executes on every request. For example, a database middleware you simply inject your "global" database object into the context. Once it's inside the context, you can retrieve it from within other middlewares and your handler function.
-
-```go
-func funcName(params string) gin.HandlerFunc {
-    // <---
-    // This is part one
-    // --->
-    // The follow code is an example
-    if err := check(params); err != nil {
-        panic(err)
-    }
-
-    return func(c *gin.Context) {
-        // <---
-        // This is part two
-        // --->
-        // The follow code is an example
-        c.Set("TestVar", params)
-        c.Next()    
-    }
-}
-```
-
-## Execution process
-
-Firstly, we have the follow example code:
-
-```go
-func main() {
-	router := gin.Default()
-
-	router.Use(globalMiddleware())
-
-	router.GET("/rest/n/api/*some", mid1(), mid2(), handler)
-
-	router.Run()
-}
-
-func globalMiddleware() gin.HandlerFunc {
-	fmt.Println("globalMiddleware...1")
-
-	return func(c *gin.Context) {
-		fmt.Println("globalMiddleware...2")
-		c.Next()
-		fmt.Println("globalMiddleware...3")
-	}
-}
-
-func handler(c *gin.Context) {
-	fmt.Println("exec handler.")
-}
-
-func mid1() gin.HandlerFunc {
-	fmt.Println("mid1...1")
-
-	return func(c *gin.Context) {
-
-		fmt.Println("mid1...2")
-		c.Next()
-		fmt.Println("mid1...3")
-	}
-}
-
-func mid2() gin.HandlerFunc {
-	fmt.Println("mid2...1")
-
-	return func(c *gin.Context) {
-		fmt.Println("mid2...2")
-		c.Next()
-		fmt.Println("mid2...3")
-	}
-}
-```
-
-According to [Consitituent part](#consitituent-part) said, when we run the gin process, **part one** will execute firstly and will print the follow information:
-
-```go
-globalMiddleware...1
-mid1...1
-mid2...1
-```
-
-And init order are:
-
-```go
-globalMiddleware...1
-    |
-    v
-mid1...1
-    |
-    v
-mid2...1
-```
-
-When we curl one request `curl -v localhost:8080/rest/n/api/some`, **part two** will execute their middleware and output the following information:
-
-```go
-globalMiddleware...2
-mid1...2
-mid2...2
-exec handler.
-mid2...3
-mid1...3
-globalMiddleware...3
-```
-
-In other words, run order are:
-
-```go
-globalMiddleware...2
-    |
-    v
-mid1...2
-    |
-    v
-mid2...2
-    |
-    v
-exec handler.
-    |
-    v
-mid2...3
-    |
-    v
-mid1...3
-    |
-    v
-globalMiddleware...3
-```