fix(api): declare binary and streaming bodies in OpenAPI

gns3server/api/openapi.py

@@ -0,0 +1,47 @@
+#
+# Copyright (C) 2026 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from typing import Any, Dict
+
+BINARY_SCHEMA: Dict[str, Any] = {"type": "string", "format": "binary"}
+
+NOTIFICATION_LINE_SCHEMA: Dict[str, Any] = {
+    "type": "object",
+    "description": "One notification event per line",
+    "properties": {
+        "action": {"type": "string"},
+        "event": {"description": "Event payload, its shape depends on the action"},
+    },
+    "required": ["action", "event"],
+    "additionalProperties": True,
+}
+
+PCAP_MEDIA_TYPE = "application/vnd.tcpdump.pcap"
+NDJSON_MEDIA_TYPE = "application/x-ndjson"
+OCTET_STREAM_MEDIA_TYPE = "application/octet-stream"
+ZIP_MEDIA_TYPE = "application/zip"
+
+
+def binary_response(media_type: str = OCTET_STREAM_MEDIA_TYPE, description: str = "Binary content") -> Dict[str, Any]:
+    return {"description": description, "content": {media_type: {"schema": BINARY_SCHEMA}}}
+
+
+def ndjson_response(description: str = "Stream of newline-delimited JSON notifications") -> Dict[str, Any]:
+    return {"description": description, "content": {NDJSON_MEDIA_TYPE: {"schema": NOTIFICATION_LINE_SCHEMA}}}
+
+
+def binary_request_body(media_type: str = OCTET_STREAM_MEDIA_TYPE) -> Dict[str, Any]:
+    return {"requestBody": {"required": True, "content": {media_type: {"schema": BINARY_SCHEMA}}}}