Fixed upload from url

boards/forms.py

@@ -304,7 +304,7 b' class PostForm(NeboardForm):'
             # Download file, stop if the size exceeds limit
             size = 0
             content = b''
-            for chunk in response.iter_content(file_DOWNLOAD_CHUNK_BYTES):
+            for chunk in response.iter_content(FILE_DOWNLOAD_CHUNK_BYTES):
                 size += len(chunk)
                 self.validate_file_size(size)
                 content += chunk
@@ -315,7 +315,7 b' class PostForm(NeboardForm):'
                 filename = 'file.' + content_type.split('/')[1]
                 img_temp = SimpleUploadedFile(filename, content,
                                               content_type)
-        except Exception:
+        except Exception as e:
             # Just return no file
             pass