feat(main): 增加path匹配器

example/matcher/main.go

@@ -29,6 +29,12 @@ func main() {
 		context.Next()
 	})
 
+	//添加带路径匹配器的自定义中间件
+	chain.UseMatcher(matcher.PathPrefix("/hello"), func(context *knife.Context) {
+		log.Println("pathPrefix matcher")
+		context.Next()
+	})
+
 	//启动服务
 	_ = http.ListenAndServe(":8080", chain)
 }

knife/matcher/path.go

@@ -0,0 +1,41 @@
+// 关于路径的匹配器
+
+package matcher
+
+import (
+	"fmt"
+	"knife"
+	"log"
+	"regexp"
+	"strings"
+)
+
+// PathPrefix 路径前缀匹配
+func PathPrefix(prefix string) knife.MiddlewareMatcher {
+	return func(response knife.HttpResponseWriter, request knife.HttpRequest) bool {
+		return strings.HasPrefix(request.URL.Path, prefix)
+	}
+}
+
+// PathMatch 路径正则匹配
+func PathMatch(pattern string) knife.MiddlewareMatcher {
+	return func(response knife.HttpResponseWriter, request knife.HttpRequest) bool {
+		matched, err := isPathMatched(request.URL.Path, pattern)
+		if err != nil {
+			log.Println("path matched failed")
+			return false
+		}
+		return matched
+	}
+}
+
+// isPathMatched 路径匹配方式
+// path 路径
+// pattern 正则表达式
+func isPathMatched(path string, pattern string) (bool, error) {
+	re, err := regexp.Compile(pattern)
+	if err != nil {
+		return false, fmt.Errorf("invalid regular expression: %w", err)
+	}
+	return re.MatchString(path), nil
+}