From a1490b41db3e2607772a10b2fd7c71d9040079ff Mon Sep 17 00:00:00 2001
From: "dc.To" <sdoz@live.com>
Date: Fri, 25 Apr 2025 17:00:06 +0800
Subject: [PATCH] init

---
 chain/clientchian.go | 59 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 chain/clientchian.go

diff --git a/chain/clientchian.go b/chain/clientchian.go
new file mode 100644
index 0000000..0a970d0
--- /dev/null
+++ b/chain/clientchian.go
@@ -0,0 +1,59 @@
+package chain
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"github.com/gogf/gf/v2/encoding/gbase64"
+	"github.com/gogf/gf/v2/frame/g"
+	"github.com/gogf/gf/v2/os/gcfg"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
+)
+
+/**
+ * 超时链
+ * @author  dc.To
+ * @version 20250409
+ */
+func ClientTimeoutInvokerChain(ctx context.Context, method string, req, res interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+	ctx, cancel := context.WithTimeout(ctx, 3*time.Second)
+	defer cancel()
+	return invoker(ctx, method, req, res, cc, opts...)
+}
+
+/**
+ * 上下文拦截链
+ * @param  void
+ * @author  dc.To
+ * @version 20250424
+ */
+func ClientContextInvokerChain(ctx context.Context, method string, req, res interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+
+	return invoker(ctx, method, req, nil, cc, opts...)
+}
+
+/**
+ * Metadata Unary Interceptor
+ * @author  dc.To
+ * @version 20250418
+ */
+func ClientMetadataUnaryChian(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	md, ok := metadata.FromIncomingContext(ctx)
+	if ok {
+		for k, v := range md {
+			if strings.HasPrefix(k, "x-cfg-") && len(v) > 0 {
+				c := strings.Join(v, "")
+				if len(c) > 0 {
+					adapter, err := gcfg.NewAdapterContent(gbase64.MustDecodeToString(v[0]))
+					if err != nil {
+						g.Log("unary").Error(ctx, err)
+					}
+					g.Cfg(strings.TrimPrefix(k, "x-cfg-")).SetAdapter(adapter)
+				}
+			}
+		}
+	}
+	return handler(ctx, req)
+}