From 422be0ae8d282bb86f50dcbb1005ebb2275d995d Mon Sep 17 00:00:00 2001
From: Cristhian Rivera <cristhianrivera4086@gmail.com>
Date: Sun, 16 Oct 2022 13:11:59 +0200
Subject: [PATCH] Allow redirection to GeoServer webapp from the ROOT webapp

---
 Dockerfile |  1 +
 README.md  |  5 +++++
 startup.sh | 16 ++++++++++++++++
 3 files changed, 22 insertions(+)

diff --git a/Dockerfile b/Dockerfile
index a40192d..4de6a4c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -31,6 +31,7 @@ ENV STABLE_PLUGIN_URL=$STABLE_PLUGIN_URL
 ENV ADDITIONAL_LIBS_DIR=/opt/additional_libs/
 ENV ADDITIONAL_FONTS_DIR=/opt/additional_fonts/
 ENV SKIP_DEMO_DATA=false
+ENV ROOT_WEBAPP_REDIRECT=false
 
 # see https://docs.geoserver.org/stable/en/user/production/container.html
 ENV CATALINA_OPTS="\$EXTRA_JAVA_OPTS \
diff --git a/README.md b/README.md
index a7470d6..2ad7a58 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,11 @@ using the same data directory.
 This image populates GeoServer with demo data by default. For production scenarios this is typically not desired.
 The environment variable `SKIP_DEMO_DATA` can be set to `true` to create an empty GeoServer.
 
+### How to issue a redirect from the root ("/") to GeoServer web interface ("/geoserver/web")?
+
+By default, the ROOT webapp is not available which makes requests to the root endpoint "/" return a 404 error.
+The environment variable `ROOT_WEBAPP_REDIRECT` can be set to `true` to issue a permanent redirect to the web interface.
+
 ### How to download and install additional extensions on startup?
 
 The ``startup.sh`` script allows some customization on startup:
diff --git a/startup.sh b/startup.sh
index b8a3ec8..548623d 100755
--- a/startup.sh
+++ b/startup.sh
@@ -6,6 +6,22 @@ if [ "${SKIP_DEMO_DATA}" = "true" ]; then
   unset GEOSERVER_REQUIRE_FILE
 fi
 
+## Add a permanent redirect (HTTP 301) from the root webapp ("/") to geoserver web interface ("/geoserver/web")
+if [ "${ROOT_WEBAPP_REDIRECT}" = "true" ]; then
+  if [ ! -d $CATALINA_HOME/webapps/ROOT ]; then
+      mkdir $CATALINA_HOME/webapps/ROOT
+  fi
+
+  cat > $CATALINA_HOME/webapps/ROOT/index.jsp << EOF
+<%
+  final String redirectURL = "/geoserver/web/";
+  response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
+  response.setHeader("Location", redirectURL);
+%>
+EOF
+fi
+
+
 ## install release data directory if needed before starting tomcat
 if [ ! -z "$GEOSERVER_REQUIRE_FILE" ] && [ ! -f "$GEOSERVER_REQUIRE_FILE" ]; then
   echo "Initialize $GEOSERVER_DATA_DIR from data directory included in geoserver.war"