Try to reauthenticate on a http status code 403

If we get a http status code 403, we should try to reauthenticate in
case the session timed out. If we then still get the error, our user
might miss the permissions for the requested action.
Using a decorator to achieve this.

Author: pnbecker

dspace_rest_client/client.py

@@ -158,6 +158,19 @@ def do_paginate(url, params):
             return decorated
         return decorator
 
+    @staticmethod
+    def reauthenticate(func):
+        @functools.wraps(func)
+        def decorated(self, *args, reauthenticate=True, **kwargs):
+            r = func(self, *args, **kwargs)
+            if r is None:
+                return r
+            if r.status_code == 401 and reauthenticate:
+                if self.authenticate():
+                    r = func(self, *args, **kwargs)
+            return r
+        return decorated
+
     @staticmethod
     def refresh_csrf(func):
         @functools.wraps(func)
@@ -314,6 +327,7 @@ def api_get(self, url, params=None, data=None, headers=None):
         self.update_token(r)
         return r
 
+    @reauthenticate
     @refresh_csrf
     def api_post(self, url, params, json):
         """
@@ -331,6 +345,7 @@ def api_post(self, url, params, json):
         self.update_token(r)
         return r
 
+    @reauthenticate
     @refresh_csrf 
     def api_post_uri(self, url, params, uri_list):
         """
@@ -348,6 +363,7 @@ def api_post_uri(self, url, params, uri_list):
         self.update_token(r)
         return r
 
+    @reauthenticate
     @refresh_csrf
     def api_put(self, url, params, json):
         """
@@ -365,6 +381,7 @@ def api_put(self, url, params, json):
         self.update_token(r)
         return r
 
+    @reauthenticate
     @refresh_csrf
     def api_delete(self, url, params):
         """
@@ -378,6 +395,7 @@ def api_delete(self, url, params):
         self.update_token(r)
         return r
 
+    @reauthenticate
     @refresh_csrf
     def api_patch(self, url, operation, path, value, params=None):
         """