From 6ef0cf95a848d31354acc3ddace1ed0ca1334dd2 Mon Sep 17 00:00:00 2001
From: "nicolas.dorier" <nicolas.dorier@gmail.com>
Date: Fri, 16 Nov 2018 22:37:21 +0900
Subject: [PATCH] Validate BTCPAY_HOST

---
 btcpay-setup.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/btcpay-setup.sh b/btcpay-setup.sh
index 6a9c995..14cc2a2 100755
--- a/btcpay-setup.sh
+++ b/btcpay-setup.sh
@@ -115,6 +115,15 @@ if [[ -f "$BTCPAY_HOST_SSHKEYFILE" ]]; then
     done
 fi
 
+if [[ "$BTCPAYGEN_REVERSEPROXY" == "nginx" ]]; then
+    DOMAIN_NAME="$(echo "$BTCPAY_HOST" | grep -P '(?=^.{4,253}$)(^(?:[a-zA-Z0-9](?:(?:[a-zA-Z0-9\-]){0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$)')"
+    if [[ ! "$DOMAIN_NAME" ]]; then
+        echo "BTCPAYGEN_REVERSEPROXY is set to nginx, so BTCPAY_HOST must point on a domain name, but the current value ('$BTCPAY_HOST') is not a valid domain name."
+        return
+    fi
+    BTCPAY_HOST="$DOMAIN_NAME"
+fi
+
 echo "
 -------SETUP-----------
 Parameters passed: