From 2cc551b8d2ccd35f7e58cff99a688d3e77489129 Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Thu, 19 May 2022 18:11:53 +0200
Subject: htgen-cyberlocker: add if_modified_since logic

---
 .../simple/htgen-cyberlocker/src/htgen-cyberlocker | 23 ++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/krebs/5pkgs/simple/htgen-cyberlocker/src/htgen-cyberlocker b/krebs/5pkgs/simple/htgen-cyberlocker/src/htgen-cyberlocker
index 5ca0ddd3..d04b4b1f 100644
--- a/krebs/5pkgs/simple/htgen-cyberlocker/src/htgen-cyberlocker
+++ b/krebs/5pkgs/simple/htgen-cyberlocker/src/htgen-cyberlocker
@@ -5,6 +5,13 @@ emptyok_response() {(
   printf '\r\n'
 )}
 
+not_modifed_response() {(
+  printf "HTTP/1.1 304 Not Modified\r\n"
+  printf 'Connection: close\r\n'
+  printf 'Server: %s\r\n' "$Server"
+  printf '\r\n'
+)}
+
 delete_response() {
   jq -n -r \
   --arg server "$Server" \
@@ -74,8 +81,20 @@ case "$Method $path" in
   'GET /'*)
     item=$STATEDIR/items/$(echo "$path" | jq -rR @uri)
     if [ -e "$item" ]; then
-      file_response "$item"
-      exit
+      if [ -z ${req_if_modified_since+x} ]; then
+        file_response "$item"
+        exit
+      else
+        age_file=$(date +%s -r "$item")
+        age_header=$(date +%s --date="$req_if_modified_since")
+        if [ "$age_file" -lt "$age_header" ]; then
+          not_modifed_response
+          exit
+        else
+          file_response "$item"
+          exit
+        fi
+      fi
     fi
   ;;
   'DELETE /'*)
-- 
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