From baee850471603d7fbf37eed0074c9de01df92ee7 Mon Sep 17 00:00:00 2001
From: KimMachineGun <geon0250@gmail.com>
Date: Tue, 6 Nov 2018 17:54:19 +0900
Subject: [PATCH] swarm: modify context key (#17925)

* swarm: modify context key

* gofmt sctx.go
---
 swarm/api/http/sctx.go | 14 +++++---------
 swarm/sctx/sctx.go     | 12 +++++-------
 2 files changed, 10 insertions(+), 16 deletions(-)

diff --git a/swarm/api/http/sctx.go b/swarm/api/http/sctx.go
index 431e11735..b8dafab0b 100644
--- a/swarm/api/http/sctx.go
+++ b/swarm/api/http/sctx.go
@@ -7,14 +7,10 @@ import (
 	"github.com/ethereum/go-ethereum/swarm/sctx"
 )
 
-type contextKey int
-
-const (
-	uriKey contextKey = iota
-)
+type uriKey struct{}
 
 func GetRUID(ctx context.Context) string {
-	v, ok := ctx.Value(sctx.HTTPRequestIDKey).(string)
+	v, ok := ctx.Value(sctx.HTTPRequestIDKey{}).(string)
 	if ok {
 		return v
 	}
@@ -22,11 +18,11 @@ func GetRUID(ctx context.Context) string {
 }
 
 func SetRUID(ctx context.Context, ruid string) context.Context {
-	return context.WithValue(ctx, sctx.HTTPRequestIDKey, ruid)
+	return context.WithValue(ctx, sctx.HTTPRequestIDKey{}, ruid)
 }
 
 func GetURI(ctx context.Context) *api.URI {
-	v, ok := ctx.Value(uriKey).(*api.URI)
+	v, ok := ctx.Value(uriKey{}).(*api.URI)
 	if ok {
 		return v
 	}
@@ -34,5 +30,5 @@ func GetURI(ctx context.Context) *api.URI {
 }
 
 func SetURI(ctx context.Context, uri *api.URI) context.Context {
-	return context.WithValue(ctx, uriKey, uri)
+	return context.WithValue(ctx, uriKey{}, uri)
 }
diff --git a/swarm/sctx/sctx.go b/swarm/sctx/sctx.go
index bed2b1145..fb7d35b00 100644
--- a/swarm/sctx/sctx.go
+++ b/swarm/sctx/sctx.go
@@ -2,19 +2,17 @@ package sctx
 
 import "context"
 
-type ContextKey int
-
-const (
-	HTTPRequestIDKey ContextKey = iota
-	requestHostKey
+type (
+	HTTPRequestIDKey struct{}
+	requestHostKey   struct{}
 )
 
 func SetHost(ctx context.Context, domain string) context.Context {
-	return context.WithValue(ctx, requestHostKey, domain)
+	return context.WithValue(ctx, requestHostKey{}, domain)
 }
 
 func GetHost(ctx context.Context) string {
-	v, ok := ctx.Value(requestHostKey).(string)
+	v, ok := ctx.Value(requestHostKey{}).(string)
 	if ok {
 		return v
 	}