Django 2.0

[wolnelektury.git] / src / catalogue / utils.py

diff --git a/src/catalogue/utils.py b/src/catalogue/utils.py
index e79b439..ec938ea 100644 (file)
--- a/src/catalogue/utils.py
+++ b/src/catalogue/utils.py
@@ -2,23 +2,24 @@
 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
-from collections import defaultdict
 import hashlib
+import os.path
 import random
 import re
 import time
 from base64 import urlsafe_b64encode
-
-from django.http import HttpResponse
-from django.core.files.uploadedfile import UploadedFile
-from django.core.files.storage import DefaultStorage
-from django.utils.encoding import force_unicode
-from django.conf import settings
-from os import mkdir, path, unlink
+from collections import defaultdict
 from errno import EEXIST, ENOENT
 from fcntl import flock, LOCK_EX
+from os import mkdir, path, unlink
 from zipfile import ZipFile
 
+from django.conf import settings
+from django.core.files.storage import DefaultStorage
+from django.core.files.uploadedfile import UploadedFile
+from django.http import HttpResponse
+from django.utils.encoding import force_text
+
 from reporting.utils import read_chunks
 
 # Use the system (hardware-based) random number generator if it exists.
@@ -26,14 +27,19 @@ if hasattr(random, 'SystemRandom'):
     randrange = random.SystemRandom().randrange
 else:
     randrange = random.randrange
-MAX_SESSION_KEY = 18446744073709551616L     # 2 << 63
+MAX_SESSION_KEY = 18446744073709551616     # 2 << 63
 
 
 def get_random_hash(seed):
-    sha_digest = hashlib.sha1('%s%s%s%s' % (
-        randrange(0, MAX_SESSION_KEY), time.time(), unicode(seed).encode('utf-8', 'replace'), settings.SECRET_KEY)
-    ).digest()
-    return urlsafe_b64encode(sha_digest).replace('=', '').replace('_', '-').lower()
+    sha_digest = hashlib.sha1((
+        '%s%s%s%s' % (
+            randrange(0, MAX_SESSION_KEY),
+            time.time(),
+            str(seed).encode('utf-8', 'replace'),
+            settings.SECRET_KEY
+        )
+    ).encode('utf-8')).digest()
+    return urlsafe_b64encode(sha_digest).decode('latin1').replace('=', '').replace('_', '-').lower()
 
 
 def split_tags(*tag_lists):
@@ -84,7 +90,7 @@ class LockFile(object):
         try:
             unlink(self.lockname)
         except OSError as oe:
-            if oe.errno != EEXIST:
+            if oe.errno != ENOENT:
                 raise oe
         self.lock.close()
 
@@ -240,7 +246,7 @@ def truncate_html_words(s, num, end_text='...'):
 
     This is just a version of django.utils.text.truncate_html_words with no space before the end_text.
     """
-    s = force_unicode(s)
+    s = force_text(s)
     length = int(num)
     if length <= 0:
         return u''
@@ -345,3 +351,16 @@ class AppSettings(object):
 
 def delete_from_cache_by_language(cache, key_template):
     cache.delete_many([key_template % lc for lc, ln in settings.LANGUAGES])
+
+
+def gallery_path(slug):
+    return os.path.join(settings.MEDIA_ROOT, settings.IMAGE_DIR, slug)
+
+
+def gallery_url(slug):
+    return '%s%s%s/' % (settings.MEDIA_URL, settings.IMAGE_DIR, slug)
+
+
+def get_mp3_length(path):
+    from mutagen.mp3 import MP3
+    return int(MP3(path).info.length)