utility function for caching form data

atst/utils/form_cache.py

@@ -0,0 +1,18 @@
+import os
+import hashlib
+import pickle
+
+
+DEFAULT_CACHE_NAME = "formcache"
+
+
+def cache_form_data(redis, formdata, expiry_seconds=3600, key_prefix=DEFAULT_CACHE_NAME):
+    value = pickle.dumps(formdata)
+    key = hashlib.sha1(os.urandom(64)).hexdigest()
+    redis.setex(name="{}:{}".format(key_prefix, key), value=value, time=expiry_seconds)
+    return key
+
+
+def retrieve_form_data(redis, formdata_key, key_prefix="formcache"):
+    data = redis.get("{}:{}".format(key_prefix, formdata_key))
+    return pickle.loads(data)