Merged document upload code and moved it to the model, improved method of handling compressed file

apps/sources/compressed_file.py

@@ -0,0 +1,25 @@
+import os
+import zipfile
+
+from django.core.files.uploadedfile import SimpleUploadedFile
+
+
+class NotACompressedFile(Exception):
+    pass
+
+
+class CompressedFile(object):
+    def __init__(self, file_object):
+        self.file_object = file_object
+
+    def children(self):        
+        try:
+            # Try for a ZIP file
+            zfobj = zipfile.ZipFile(self.file_object)
+            filenames = [filename for filename in zfobj.namelist() if not filename.endswith('/')]
+            return (SimpleUploadedFile(name=filename, content=zfobj.read(filename)) for filename in filenames)
+        except zipfile.BadZipfile:
+            raise NotACompressedFile
+        
+    #def close(self):
+    #    self.file_object.close()