Enhancement#4356: Add gzipped dumps import support

CHANGELOG.md

@@ -18,7 +18,9 @@
 - Add a new permissions to allow add comments instead of use the existent modify permission for this purpose.
 - Include created, modified and finished dates for tasks in CSV reports
 - User stories and tasks listing API call support extra params to include more data (tasks and attachemnts and attachments, respectively)
-
+- Import/Export:
+    - Gzip export/import support.
+    - Export performance improvements.
 
 ### Misc
 - [API] Improve performance of some calls over list.

taiga/export_import/api.py

@@ -318,6 +318,9 @@ class ProjectImporterViewSet(mixins.ImportThrottlingPolicyMixin, CreateModelMixi
         if not dump:
             raise exc.WrongArguments(_("Needed dump file"))
 
+        if dump.content_type == "application/gzip":
+            dump = gzip.GzipFile(fileobj=dump)
+
         reader = codecs.getreader("utf-8")
 
         try: