From e712e7f3b1c81b150efd95de886778458be8073a Mon Sep 17 00:00:00 2001
From: anirut <anirut.workspace@gmail.com>
Date: Thu, 1 Sep 2022 00:36:30 +0700
Subject: [PATCH] :zap: add headers option

---
 transport/http/calloption.go | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/transport/http/calloption.go b/transport/http/calloption.go
index 7b0ed82d1..0b245079a 100644
--- a/transport/http/calloption.go
+++ b/transport/http/calloption.go
@@ -20,6 +20,7 @@ type callInfo struct {
 	contentType  string
 	operation    string
 	pathTemplate string
+	headers      map[string]string
 }
 
 // EmptyCallOption does not alter the Call configuration.
@@ -55,6 +56,7 @@ func defaultCallInfo(path string) callInfo {
 		contentType:  "application/json",
 		operation:    path,
 		pathTemplate: path,
+		headers:      make(map[string]string),
 	}
 }
 
@@ -107,3 +109,20 @@ func (o HeaderCallOption) after(c *callInfo, cs *csAttempt) {
 		*o.header = cs.res.Header
 	}
 }
+
+// Headers returns a CallOptions that pass the http request header
+// to server .
+func Headers(headers map[string]string) CallOption {
+	return HeadersCallOption{headers: headers}
+}
+
+// HeaderCallOption is http headers that want to set before call the client
+type HeadersCallOption struct {
+	EmptyCallOption
+	headers map[string]string
+}
+
+func (o HeadersCallOption) before(c *callInfo) error {
+	c.headers = o.headers
+	return nil
+}