Move random_hex function to voussoirkit/passwordy.

etiquette/helpers.py

@@ -379,12 +379,6 @@ def parse_unit_string(s):
     else:
         return bytestring.parsebytes(s)
 
-def random_hex(length=12):
-    randbytes = os.urandom(math.ceil(length / 2))
-    token = ''.join('{:02x}'.format(x) for x in randbytes)
-    token = token[:length]
-    return token
-
 def read_filebytes(filepath, range_min=0, range_max=None, chunk_size=bytestring.MIBIBYTE):
     '''
     Yield chunks of bytes from the file between the endpoints.

etiquette/photodb.py

@@ -11,6 +11,7 @@ import types
 from voussoirkit import cacheclass
 from voussoirkit import configlayers
 from voussoirkit import expressionmatch
+from voussoirkit import passwordy
 from voussoirkit import pathclass
 from voussoirkit import ratelimiter
 from voussoirkit import spinal
@@ -1077,7 +1078,7 @@ class PDBSQLMixin:
             self.on_commit_queue.clear()
 
     def savepoint(self, message=None):
-        savepoint_id = helpers.random_hex(length=16)
+        savepoint_id = passwordy.random_hex(length=16)
         if message:
             self.log.log(5, 'Savepoint %s for %s.', savepoint_id, message)
         else:

frontends/etiquette_flask/backend/caching.py

@@ -3,6 +3,7 @@ import functools
 import time
 
 from voussoirkit import cacheclass
+from voussoirkit import passwordy
 
 import etiquette
 
@@ -48,7 +49,7 @@ def cached_endpoint(max_age):
                     value = value.response
                 if value != state['stored_value']:
                     state['stored_value'] = value
-                    state['stored_etag'] = etiquette.helpers.random_hex(20)
+                    state['stored_etag'] = passwordy.random_hex(20)
                     state['headers']['ETag'] = state['stored_etag']
                 state['last_run'] = time.time()
             else:

frontends/etiquette_flask/backend/sessions.py

@@ -4,6 +4,7 @@ import werkzeug.wrappers
 import werkzeug.datastructures
 
 from voussoirkit import cacheclass
+from voussoirkit import passwordy
 
 import etiquette
 
@@ -12,7 +13,7 @@ REQUEST_TYPES = (flask.Request, werkzeug.wrappers.Request, werkzeug.local.LocalP
 RESPONSE_TYPES = (flask.Response, werkzeug.wrappers.Response)
 
 def _generate_token(length=32):
-    return etiquette.helpers.random_hex(length=length)
+    return passwordy.random_hex(length=length)
 
 def _normalize_token(token):
     if isinstance(token, REQUEST_TYPES):