Error handling, better code quality.

Handling of os errors raised during parent
directory creation.

qutebrowser/browser/downloads.py

@@ -139,7 +139,7 @@ def create_full_filename(basename, filename):
     filename = utils.force_encoding(filename, encoding)
     basename = utils.force_encoding(basename, encoding)
     if os.path.isabs(filename) and (os.path.isdir(filename) or
-                                    os.path.join(filename, "") == filename):
+                                    filename.endswith(os.sep)):
         # We got an absolute directory from the user, so we save it under
         # the default filename in that directory.
         return os.path.join(filename, basename)
@@ -606,6 +606,11 @@ class AbstractDownloadItem(QObject):
         """Ask a confirmation question for the download."""
         raise NotImplementedError
 
+    def _ask_create_parent_question(self, title, msg,
+                                    force_overwrite, remember_directory):
+        """Ask a confirmation question for the parent directory."""
+        raise NotImplementedError
+
     def _set_fileobj(self, fileobj, *, autoclose=True):
         """Set a file object to save the download to.
 
@@ -683,11 +688,10 @@ class AbstractDownloadItem(QObject):
 
         try:
             os.makedirs(os.path.dirname(self._filename))
+        except FileExistsError:
+            pass
         except OSError as e:
-            # Unlikely, but could be created before
-            # we get a chance to create it.
-            if e.errno != errno.EEXIST:
-                raise
+            self._die(e.strerror)
 
         self.basename = os.path.basename(self._filename)
         if remember_directory:

qutebrowser/browser/webengine/webenginedownloads.py

@@ -120,6 +120,19 @@ class DownloadItem(downloads.AbstractDownloadItem):
                              "state {} (not in requested state)!".format(
                                  filename, self, state_name))
 
+    def _ask_confirm_question(self, title, msg):
+        no_action = functools.partial(self.cancel, remove_data=False)
+        question = usertypes.Question()
+        question.title = title
+        question.text = msg
+        question.mode = usertypes.PromptMode.yesno
+        question.answered_yes.connect(self._after_set_filename)
+        question.answered_no.connect(no_action)
+        question.cancelled.connect(no_action)
+        self.cancelled.connect(question.abort)
+        self.error.connect(question.abort)
+        message.global_bridge.ask(question, blocking=True)
+
     def _ask_create_parent_question(self, title, msg,
                                     force_overwrite, remember_directory):
         no_action = functools.partial(self.cancel, remove_data=False)
@@ -136,19 +149,6 @@ class DownloadItem(downloads.AbstractDownloadItem):
         self.error.connect(question.abort)
         message.global_bridge.ask(question, blocking=True)
 
-    def _ask_confirm_question(self, title, msg):
-        no_action = functools.partial(self.cancel, remove_data=False)
-        question = usertypes.Question()
-        question.title = title
-        question.text = msg
-        question.mode = usertypes.PromptMode.yesno
-        question.answered_yes.connect(self._after_set_filename)
-        question.answered_no.connect(no_action)
-        question.cancelled.connect(no_action)
-        self.cancelled.connect(question.abort)
-        self.error.connect(question.abort)
-        message.global_bridge.ask(question, blocking=True)
-
     def _after_set_filename(self):
         self._qt_item.setPath(self._filename)
         self._qt_item.accept()