refactor: using requestHeader internal func (#1083)

* refactor: using requestHeader internal func.

* update

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

auth.go

@@ -47,7 +47,7 @@ func BasicAuthForRealm(accounts Accounts, realm string) HandlerFunc {
 	pairs := processAccounts(accounts)
 	return func(c *Context) {
 		// Search user in the slice of allowed credentials
-		user, found := pairs.searchCredential(c.Request.Header.Get("Authorization"))
+		user, found := pairs.searchCredential(c.requestHeader("Authorization"))
 		if !found {
 			// Credentials doesn't match, we return 401 and abort handlers chain.
 			c.Header("WWW-Authenticate", realm)

context.go

@@ -509,7 +509,7 @@ func (c *Context) ClientIP() string {
 	}
 
 	if c.engine.AppEngine {
-		if addr := c.Request.Header.Get("X-Appengine-Remote-Addr"); addr != "" {
+		if addr := c.requestHeader("X-Appengine-Remote-Addr"); addr != "" {
 			return addr
 		}
 	}