Fix Zulip SAML callback scheme handling

nixos/modules/burrow-zulip.nix

@@ -307,6 +307,34 @@ SQL
         install -m 0644 ${composeFile} ${lib.escapeShellArg "${cfg.dataDir}/compose.yaml"}
         : > ${lib.escapeShellArg "${cfg.dataDir}/secrets/email-password"}
         chmod 0600 ${lib.escapeShellArg "${cfg.dataDir}/secrets/email-password"}
+        cat > ${lib.escapeShellArg "${cfg.dataDir}/uwsgi_params"} <<'EOF'
+uwsgi_param QUERY_STRING    $query_string;
+uwsgi_param REQUEST_METHOD  $request_method;
+uwsgi_param CONTENT_TYPE    $content_type;
+uwsgi_param CONTENT_LENGTH  $content_length;
+uwsgi_param REQUEST_URI     $request_uri;
+uwsgi_param PATH_INFO       $document_uri;
+uwsgi_param DOCUMENT_ROOT   $document_root;
+uwsgi_param SERVER_PROTOCOL $server_protocol;
+uwsgi_param REQUEST_SCHEME  $trusted_x_forwarded_proto;
+uwsgi_param HTTPS           on;
+uwsgi_param REMOTE_ADDR     $remote_addr;
+uwsgi_param REMOTE_PORT     $remote_port;
+uwsgi_param SERVER_ADDR     $server_addr;
+uwsgi_param SERVER_PORT     $server_port;
+uwsgi_param SERVER_NAME     $server_name;
+uwsgi_param HTTP_X_REAL_IP  $remote_addr;
+uwsgi_param HTTP_X_FORWARDED_PROTO $trusted_x_forwarded_proto;
+uwsgi_param HTTP_X_FORWARDED_SSL "";
+uwsgi_param HTTP_X_PROXY_MISCONFIGURATION $x_proxy_misconfiguration;
+
+# This value is the default, and is provided for explicitness; it must
+# be longer than the configured 55s "harakiri" timeout in uwsgi
+uwsgi_read_timeout 60s;
+
+uwsgi_pass django;
+EOF
+        chmod 0644 ${lib.escapeShellArg "${cfg.dataDir}/uwsgi_params"}
 
         metadata_xml="$(${pkgs.curl}/bin/curl -fsSL https://${cfg.authentikDomain}/application/saml/${cfg.authentikProviderSlug}/metadata/)"
         saml_cert="$(printf '%s' "$metadata_xml" | ${pkgs.python3}/bin/python3 -c '
@@ -390,6 +418,8 @@ services:
                 },
             },
         }
+    volumes:
+      - ${cfg.dataDir}/uwsgi_params:/etc/nginx/uwsgi_params:ro
 EOF
       '';
     };