From 24fc1f073dd5ec0302937fb51729991dd9a40ba3 Mon Sep 17 00:00:00 2001
From: Taylor Gerring <taylor.gerring@gmail.com>
Date: Sun, 29 Mar 2015 21:21:14 +0200
Subject: [PATCH] Add flag to control CORS header #394

* Disabled on CLI
* http://localhost on Mist
---
 cmd/geth/main.go   | 1 +
 cmd/mist/main.go   | 7 +++++++
 cmd/utils/flags.go | 6 +++++-
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index 05e2e4ae6..62e30ac9a 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -233,6 +233,7 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
 		utils.VMDebugFlag,
 		utils.ProtocolVersionFlag,
 		utils.NetworkIdFlag,
+		utils.RPCCORSDomainFlag,
 	}
 
 	// missing:
diff --git a/cmd/mist/main.go b/cmd/mist/main.go
index fab651b22..6780cfb3a 100644
--- a/cmd/mist/main.go
+++ b/cmd/mist/main.go
@@ -47,12 +47,19 @@ var (
 		Usage: "absolute path to GUI assets directory",
 		Value: common.DefaultAssetPath(),
 	}
+	rpcCorsFlag = utils.RPCCORSDomainFlag
 )
 
 func init() {
+	// Mist-specific default
+	if len(rpcCorsFlag.Value) == 0 {
+		rpcCorsFlag.Value = "http://localhost"
+	}
+
 	app.Action = run
 	app.Flags = []cli.Flag{
 		assetPathFlag,
+		rpcCorsFlag,
 
 		utils.BootnodesFlag,
 		utils.DataDirFlag,
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 2a3e2f447..131f8a5c0 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -148,7 +148,11 @@ var (
 		Usage: "Port on which the JSON-RPC server should listen",
 		Value: 8545,
 	}
-
+	RPCCORSDomainFlag = cli.StringFlag{
+		Name:  "rpccorsdomain",
+		Usage: "Domain on which to send Access-Control-Allow-Origin header",
+		Value: "",
+	}
 	// Network Settings
 	MaxPeersFlag = cli.IntFlag{
 		Name:  "maxpeers",