allow overwriting oauth callback host and scheme for local testing

src/c3nav/editor/hosters/base.py

@@ -1,5 +1,7 @@
 from abc import ABC, abstractmethod
+from urllib.parse import urlparse, urlunparse
 
+from django.conf import settings
 from django.urls.base import reverse
 from django.utils.translation import ugettext_lazy as _
 
@@ -19,7 +21,16 @@ class Hoster(ABC):
         return Package.objects.filter(home_repo__startswith=self.base_url)
 
     def _get_callback_uri(self, request):
-        return request.build_absolute_uri(reverse('editor.oauth.callback', kwargs={'hoster': self.name}))
+        uri = request.build_absolute_uri(reverse('editor.oauth.callback', kwargs={'hoster': self.name}))
+        if settings.OAUTH_CALLBACK_SCHEME is None and settings.OAUTH_CALLBACK_NETLOC is None:
+            return uri
+
+        parts = list(urlparse(uri))
+        if settings.OAUTH_CALLBACK_SCHEME is not None:
+            parts[0] = settings.OAUTH_CALLBACK_SCHEME
+        if settings.OAUTH_CALLBACK_NETLOC is not None:
+            parts[1] = settings.OAUTH_CALLBACK_NETLOC
+        return urlunparse(parts)
 
     def _get_session_data(self, request):
         request.session.modified = True

src/c3nav/settings.py

@@ -51,6 +51,8 @@ DIRECT_EDITING = config.getboolean('c3nav', 'direct_editing', fallback=DEBUG)
 PUBLIC_PACKAGES = [n for n in config.get('c3nav', 'public_packages', fallback='').split(',') if n]
 
 EDITOR_HOSTERS = OrderedDict((name[7:], data) for name, data in config.items() if name.startswith('hoster:'))
+OAUTH_CALLBACK_SCHEME = config.get('c3nav', 'oauth_callback_scheme')
+OAUTH_CALLBACK_NETLOC = config.get('c3nav', 'oauth_callback_netloc')
 
 db_backend = config.get('database', 'backend', fallback='sqlite3')
 DATABASES = {