From e45d83de5a893a80d69111746251aa954aa491fa Mon Sep 17 00:00:00 2001
From: Finn Stutzenstein <finn.stutzenstein@hotmail.de>
Date: Thu, 18 Mar 2021 13:52:51 +0100
Subject: [PATCH] Small mediafile fixes

---
 server/openslides/mediafiles/utils.py |  9 +++++++--
 server/openslides/mediafiles/views.py | 15 ++++++++++-----
 server/tests/old/utils/test_main.py   |  1 +
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/server/openslides/mediafiles/utils.py b/server/openslides/mediafiles/utils.py
index c9aef9666..fceaed1cd 100644
--- a/server/openslides/mediafiles/utils.py
+++ b/server/openslides/mediafiles/utils.py
@@ -20,9 +20,14 @@ def get_pdf_information(mediafile):
     try:
         pdf = PdfFileReader(mediafile)
         result["pages"] = pdf.getNumPages()
-    except (PdfReadError, KeyError):
+    except PdfReadError:
         # File could be encrypted but not be detected by PyPDF.
-        # KeyError: https://github.com/mstamy2/PyPDF2/issues/353 Very rare to occur, but do not raise a 500
         result["pages"] = 0
         result["encrypted"] = True
+    except (KeyError, OSError):
+        # Other errors. Mostly very rare to occur, but do not raise a 500:
+        # KeyError: https://github.com/mstamy2/PyPDF2/issues/353
+        # OSError: https://github.com/mstamy2/PyPDF2/issues/530
+        result["pages"] = 0
+        result["read_error"] = True
     return result
diff --git a/server/openslides/mediafiles/views.py b/server/openslides/mediafiles/views.py
index e03b6bc99..ce3365eec 100644
--- a/server/openslides/mediafiles/views.py
+++ b/server/openslides/mediafiles/views.py
@@ -292,7 +292,7 @@ def get_mediafile(request, path):
     A user must have all access permissions for all folders the the file itself,
     or the file is a special file (logo or font), then it is always returned.
 
-    If the mediafile cannot be found,  a Mediafile.DoesNotExist will be raised.
+    If the mediafile cannot be found, a Mediafile.DoesNotExist will be raised.
     """
     if not path:
         raise Mediafile.DoesNotExist()
@@ -301,14 +301,19 @@ def get_mediafile(request, path):
     can_see = has_perm(request.user, "mediafiles.can_see")
     for i, part in enumerate(parts):
         is_directory = i < len(parts) - 1
+        # A .get would be sufficient, but sometimes someone has uploaded a file twice due to complicated
+        # transaction management of two databases during create. So instead of returning a 500er (since
+        # .get returned multiple objects) we deliver the first file.
         if is_directory:
-            mediafile = Mediafile.objects.get(
+            mediafile = Mediafile.objects.filter(
                 parent=parent, is_directory=is_directory, title=part
-            )
+            ).first()
         else:
-            mediafile = Mediafile.objects.get(
+            mediafile = Mediafile.objects.filter(
                 parent=parent, is_directory=is_directory, original_filename=part
-            )
+            ).first()
+        if mediafile is None:
+            raise Mediafile.DoesNotExist()
         if mediafile.access_groups.exists() and not in_some_groups(
             request.user.id, [group.id for group in mediafile.access_groups.all()]
         ):
diff --git a/server/tests/old/utils/test_main.py b/server/tests/old/utils/test_main.py
index 5561b7259..a4cea042c 100644
--- a/server/tests/old/utils/test_main.py
+++ b/server/tests/old/utils/test_main.py
@@ -38,6 +38,7 @@ class TestFunctions(TestCase):
     @patch("openslides.utils.main.detect_openslides_type")
     @patch("openslides.utils.main.os.path.expanduser")
     def test_get_default_settings_dir_unix(self, mock_expanduser, mock_detect):
+        os.environ.pop("XDG_CONFIG_HOME", None)
         mock_expanduser.return_value = "/home/test/.config"
         self.assertEqual(
             main.get_default_settings_dir(main.UNIX_VERSION),