Forward query string when redirecting from /git-pull/ endpoint

nbgitpuller/handlers.py

@@ -132,6 +132,20 @@ def pull():
             self.git_lock.release()
 
 
+USED_UI_ARGUMENTS = frozenset((
+    'repo',
+    'branch',
+    'depth',
+    'urlpath',
+    'urlPath',
+    'subpath',
+    'subPath',
+    'app',
+    'targetpath',
+    'targetPath',
+))
+
+
 class UIHandler(IPythonHandler):
     @web.authenticated
     async def get(self):
@@ -149,6 +163,8 @@ async def get(self):
         targetpath = self.get_argument('targetpath', None) or \
                      self.get_argument('targetPath', repo.split('/')[-1])
 
+        targetpath = self.combine_qs(targetpath)
+
         if urlPath:
             path = urlPath
         else:
@@ -168,6 +184,17 @@ async def get(self):
         )
         await self.flush()
 
+    def combine_qs(self, targetpath):
+        from urllib.parse import urlparse, parse_qs, urlencode, urlunparse
+        target_parsed = urlparse(targetpath)
+        target_qs = parse_qs(target_parsed.query)
+        for key in self.request.arguments:
+            if key in USED_UI_ARGUMENTS or key in target_qs:
+                continue
+            target_qs[key] = self.get_argument(key)
+        targetpath = urlunparse(target_parsed._replace(query=urlencode(target_qs, doseq=True)))
+        return targetpath
+
 
 class LegacyGitSyncRedirectHandler(IPythonHandler):
     """