apply proxy fix

cellxgene_gateway/gateway.py

@@ -25,7 +25,7 @@ from flask import (
 )
 from flask_api import status
 from werkzeug.utils import secure_filename
-
+from werkzeug.middleware.proxy_fix import ProxyFix
 from cellxgene_gateway import env
 from cellxgene_gateway.backend_cache import BackendCache
 from cellxgene_gateway.cache_entry import CacheEntryStatus
@@ -50,6 +50,7 @@ def _force_https(app):
 
 
 app.wsgi_app = _force_https(app.wsgi_app)
+app.wsgi_app = ProxyFix(app.wsgi_app, x_proto=1, x_host=1)
 
 cache = BackendCache()
 location = f"{env.external_protocol}://{env.external_host}"
@@ -149,11 +150,7 @@ def upload_file():
             if "file" in request.files:
                 f = request.files["file"]
                 if f and f.filename.endswith(".h5ad"):
-                    f.save(
-                        os.path.join(
-                            full_upload_path, secure_filename(f.filename)
-                        )
-                    )
+                    f.save(os.path.join(full_upload_path, secure_filename(f.filename)))
                     return redirect("/filecrawl.html", code=302)
                 else:
                     raise CellxgeneException(
@@ -166,21 +163,15 @@ def upload_file():
                     status.HTTP_400_BAD_REQUEST,
                 )
     else:
-        raise CellxgeneException(
-            "Invalid directory.", status.HTTP_400_BAD_REQUEST
-        )
+        raise CellxgeneException("Invalid directory.", status.HTTP_400_BAD_REQUEST)
 
     return redirect(location, code=302)
 
 
 if env.enable_upload:
     app.add_url_rule("/make_user", "make_user", make_user, methods=["POST"])
-    app.add_url_rule(
-        "/make_subdir", "make_subdir", make_subdir, methods=["POST"]
-    )
-    app.add_url_rule(
-        "/upload_file", "upload_file", upload_file, methods=["POST"]
-    )
+    app.add_url_rule("/make_subdir", "make_subdir", make_subdir, methods=["POST"])
+    app.add_url_rule("/upload_file", "upload_file", upload_file, methods=["POST"])
 
 
 def set_no_cache(resp):