no submod

work/notea/crawler/cache.sh

@@ -0,0 +1,28 @@
+#! /bin/bash
+
+cache() (
+   path() {
+      echo "$CACHE/$(echo "$*" | base64 | md5sum | awk '{print $1}')"
+   }
+   get() {
+      local path="$(path "$*")"
+      if ! [ -f "$path" ]; then
+         return 1
+      fi
+      if wc -c "$path" | grep -q '^[ ]*0[ ]*$'; then
+         return 1
+      fi
+      local created="$(date -r "$path" +%s)"
+      local now="$(date +%s)"
+      if ((now-created > CACHE_DURATION)); then
+         return 1
+      fi
+      cat "$path"
+   }
+   put() {
+      local path="$(path "$*")"
+      tee "$path"
+   }
+   "$@"
+)
+