test if removed hosts are still online

No longer required, since version 1.5.

get-hosts.sh

@@ -14,16 +14,14 @@ cd "$(dirname "$0")" || exit
 # If Agunua is installed, use it.
 if command -v agunua >/dev/null; then
   # Using Agunua is more secure, because it does certificate pinning.
-  # The --insecure option just makes it accept certificates that are
-  # not signed by a (known) CA.
-  hosts1=$(agunua --insecure --binary --maximum-time 20 \
+  hosts1=$(agunua --binary --maximum-time 20 \
     gemini://geminispace.info/known-hosts 2>/dev/null \
     | grep "gemini://" | cut -d ' ' -f 3)
   if [ -z "$hosts1" ]; then
     >&2 echo "geminispace.info/known-hosts download failed."
     exit 1
   fi
-  hosts2=$(agunua --insecure --binary --maximum-time 20 \
+  hosts2=$(agunua --binary --maximum-time 20 \
     gemini://gemini.bortzmeyer.org/software/lupa/lupa-capsules.txt 2>/dev/null)
   if [ -z "$hosts2" ]; then
     >&2 echo "lupa-capsules.txt download failed."
@@ -70,6 +68,35 @@ if [ -z "$hosts" ]; then
   exit 1
 fi
 
+# Save to temporary file.
+tempfile=$(mktemp)
+echo "$hosts" > "$tempfile"
+
+# Delete temporary file on exit.
+finish() {
+  rm -f "$tempfile"
+}
+trap finish EXIT
+
+# Test if removed hosts are still online.
+echo "Testing removed hosts..."
+for removed_host in $(diff hosts "$tempfile" | grep ^\< | cut -c 3-); do
+  printf "%s" "$removed_host"
+  # If direct connection fails, try to connect through Tor.
+  if agunua --no-tofu --maximum-time 20 "$removed_host" >/dev/null 2>&1 || \
+      agunua --socks 127.0.0.1:9050 --no-tofu --maximum-time 20 "$removed_host" >/dev/null 2>&1; then
+    echo " - ONLINE"
+    # Add removed host back.
+    hosts="$hosts
+$removed_host"
+  else
+    echo " - offilne"
+  fi
+done
+
+# Sort entries again.
+hosts=$(echo "$hosts" | sort)
+
 # Save to file.
 echo "$hosts" > hosts