From 24b1e25f80fbc688657b3efe97d3ba65ef2040b3 Mon Sep 17 00:00:00 2001
From: Maniack Crudelis <maniackc_dev@crudelis.fr>
Date: Sun, 5 May 2019 19:29:59 +0200
Subject: [PATCH] Handle well-known conflict

---
 scripts/_common.sh | 35 +++++++++++++++++++++++++++++++++++
 scripts/install    |  8 +++++++-
 scripts/restore    |  8 +++++++-
 3 files changed, 49 insertions(+), 2 deletions(-)
 create mode 100644 scripts/_common.sh

diff --git a/scripts/_common.sh b/scripts/_common.sh
new file mode 100644
index 0000000..0a018dc
--- /dev/null
+++ b/scripts/_common.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+#=================================================
+# EXPERIMENTAL HELPERS
+#=================================================
+
+# Check if an URL is already handled
+# usage: is_url_handled URL
+is_url_handled() {
+    # Declare an array to define the options of this helper.
+    declare -Ar args_array=( [u]=url= )
+    local url
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+
+    # Try to get the url with curl, and keep the http code and an eventual redirection url.
+    local curl_output="$(curl --insecure --silent --output /dev/null \
+      --write-out '%{http_code};%{redirect_url}' "$url")"
+
+    # Cut the output and keep only the first part to keep the http code
+    local http_code="${curl_output%%;*}"
+    # Do the same thing but keep the second part, the redirection url
+    local redirection="${curl_output#*;}"
+
+    # Return 1 if the url isn't handled.
+    # Which means either curl got a 404 (or the admin) or the sso.
+    # A handled url should redirect to a publicly accessible url.
+    # Return 1 if the url has returned 404
+    if [ "$http_code" = "404" ] || [[ $redirection =~ "/yunohost/admin" ]]; then
+        return 1
+    # Return 1 if the url is redirected to the SSO
+    elif [[ $redirection =~ "/yunohost/sso" ]]; then
+        return 1
+    fi
+}
diff --git a/scripts/install b/scripts/install
index 075beb9..f027e99 100644
--- a/scripts/install
+++ b/scripts/install
@@ -6,7 +6,7 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-#source ./_common.sh
+source ./_common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -40,6 +40,12 @@ path_url=$(ynh_normalize_url_path $path_url)
 # Register (book) web path
 ynh_webpath_register $app $domain $path_url
 
+# Check if .well-known is available for this domain.
+if is_url_handled "https://$domain/.well-known/caldav" || is_url_handled "https://$domain/.well-known/carddav"
+then
+    ynh_die --message="Another app already uses the domain $domain to serve a caldav/carddav feature. Please use another domain."
+fi
+
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 02cc555..2f4592a 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -6,7 +6,7 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-# source ../settings/scripts/_common.sh
+source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -38,6 +38,12 @@ ynh_webpath_available $domain $path_url \
 test ! -d $final_path \
 	|| ynh_die "There is already a directory: $final_path "
 
+# Check if .well-known is available for this domain.
+if is_url_handled "https://$domain/.well-known/caldav" || is_url_handled "https://$domain/.well-known/carddav"
+then
+    ynh_die --message="Another app already uses the domain $domain to serve a caldav/carddav feature. Please use another domain."
+fi
+
 #=================================================
 # STANDARD RESTORATION STEPS
 #=================================================