Merge pull request #42967 from terminalmage/issue42941

Fix bug in on_header callback when no Content-Type is found in headers

salt/fileclient.py

@@ -621,6 +621,13 @@ class Client(object):
 
             def on_header(hdr):
                 if write_body[1] is not False and write_body[2] is None:
+                    if not hdr.strip() and 'Content-Type' not in write_body[1]:
+                        # We've reached the end of the headers and not yet
+                        # found the Content-Type. Reset the values we're
+                        # tracking so that we properly follow the redirect.
+                        write_body[0] = None
+                        write_body[1] = False
+                        return
                     # Try to find out what content type encoding is used if
                     # this is a text file
                     write_body[1].parse_line(hdr)  # pylint: disable=no-member