http/bm: add prefix matcher for the path prefix (#2020)

* add prefix matcher for the path prefix

* fix prefix path

pkg/net/http/blademaster/routergroup.go

@@ -2,6 +2,7 @@ package blademaster
 
 import (
 	"regexp"
+	"strings"
 )
 
 // IRouter http router framework interface.
@@ -49,6 +50,29 @@ func (group *RouterGroup) UseFunc(middleware ...HandlerFunc) IRoutes {
 	return group.returnObj()
 }
 
+// Prefix adds a matcher for the URL path prefix.
+func (group *RouterGroup) Prefix(prefix string, handlers ...Handler) IRoutes {
+	return group.PrefixFunc(prefix, func(c *Context) {
+		for _, h := range handlers {
+			h.ServeHTTP(c)
+		}
+	})
+}
+
+// PrefixFunc adds a matcher for the URL path prefix.
+func (group *RouterGroup) PrefixFunc(prefix string, handlers ...HandlerFunc) IRoutes {
+	return group.UseFunc(func(c *Context) {
+		if strings.HasPrefix(c.Request.URL.Path, prefix) {
+			for _, h := range handlers {
+				h.ServeHTTP(c)
+			}
+			c.Abort()
+			return
+		}
+		c.Next()
+	})
+}
+
 // Group creates a new router group. You should add all the routes that have common middlwares or the same path prefix.
 // For example, all the routes that use a common middlware for authorization could be grouped.
 func (group *RouterGroup) Group(relativePath string, handlers ...HandlerFunc) *RouterGroup {

pkg/net/http/blademaster/server.go

@@ -392,6 +392,22 @@ func (engine *Engine) Use(middleware ...Handler) IRoutes {
 	return engine
 }
 
+// PrefixFunc adds a matcher for the URL path prefix.
+func (engine *Engine) PrefixFunc(prefix string, handlers ...HandlerFunc) IRoutes {
+	engine.RouterGroup.PrefixFunc(prefix, handlers...)
+	engine.rebuild404Handlers()
+	engine.rebuild405Handlers()
+	return engine
+}
+
+// Prefix adds a matcher for the URL path prefix.
+func (engine *Engine) Prefix(prefix string, handlers ...Handler) IRoutes {
+	engine.RouterGroup.Prefix(prefix, handlers...)
+	engine.rebuild404Handlers()
+	engine.rebuild405Handlers()
+	return engine
+}
+
 // Ping is used to set the general HTTP ping handler.
 func (engine *Engine) Ping(handler HandlerFunc) {
 	engine.GET("/ping", handler)