chore: add script to generate openapi v2 json and add in README #35474 (#35477)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/README.md

@@ -101,3 +101,11 @@ The scripts resolve paths relative to their location, so you can run them from a
    uv run ruff format ./        # Format code
    uv run basedpyright .        # Type checking
    ```
+
+## Generate TS stub
+
+```
+uv run dev/generate_swagger_specs.py --output-dir openapi
+```
+
+use https://jsontotable.org/openapi-to-typescript to convert to typescript

api/dev/generate_swagger_specs.py

@@ -0,0 +1,172 @@
+"""Generate Flask-RESTX Swagger 2.0 specs without booting the full backend.
+
+This helper intentionally avoids `app_factory.create_app()`. The normal backend
+startup eagerly initializes database, Redis, Celery, and storage extensions,
+which is unnecessary when the goal is only to serialize the Flask-RESTX
+`/swagger.json` documents.
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import logging
+import os
+import sys
+from dataclasses import dataclass
+from pathlib import Path
+
+from flask import Flask
+from flask_restx.swagger import Swagger
+
+logger = logging.getLogger(__name__)
+
+API_ROOT = Path(__file__).resolve().parents[1]
+if str(API_ROOT) not in sys.path:
+    sys.path.insert(0, str(API_ROOT))
+
+
+@dataclass(frozen=True)
+class SpecTarget:
+    route: str
+    filename: str
+
+
+SPEC_TARGETS: tuple[SpecTarget, ...] = (
+    SpecTarget(route="/console/api/swagger.json", filename="console-swagger.json"),
+    SpecTarget(route="/api/swagger.json", filename="web-swagger.json"),
+    SpecTarget(route="/v1/swagger.json", filename="service-swagger.json"),
+)
+
+_ORIGINAL_REGISTER_MODEL = Swagger.register_model
+_ORIGINAL_REGISTER_FIELD = Swagger.register_field
+
+
+def _apply_runtime_defaults() -> None:
+    """Force the small config surface required for Swagger generation."""
+
+    os.environ.setdefault("SECRET_KEY", "spec-export")
+    os.environ.setdefault("STORAGE_TYPE", "local")
+    os.environ.setdefault("STORAGE_LOCAL_PATH", "/tmp/dify-storage")
+    os.environ.setdefault("SWAGGER_UI_ENABLED", "true")
+
+    from configs import dify_config
+
+    dify_config.SECRET_KEY = os.environ["SECRET_KEY"]
+    dify_config.STORAGE_TYPE = "local"
+    dify_config.STORAGE_LOCAL_PATH = os.environ["STORAGE_LOCAL_PATH"]
+    dify_config.SWAGGER_UI_ENABLED = os.environ["SWAGGER_UI_ENABLED"].lower() == "true"
+
+
+def _patch_swagger_for_inline_nested_dicts() -> None:
+    """Teach Flask-RESTX Swagger generation to tolerate inline nested field maps.
+
+    Some existing controllers use `fields.Nested({...})` with a raw field mapping
+    instead of a named `api.model(...)`. Flask-RESTX crashes on those anonymous
+    dicts during schema registration, so this helper upgrades them into temporary
+    named models at export time.
+    """
+
+    if getattr(Swagger, "_dify_inline_nested_dict_patch", False):
+        return
+
+    def get_or_create_inline_model(self: Swagger, nested_fields: dict[object, object]) -> object:
+        anonymous_models = getattr(self, "_anonymous_inline_models", None)
+        if anonymous_models is None:
+            anonymous_models = {}
+            self._anonymous_inline_models = anonymous_models
+
+        anonymous_name = anonymous_models.get(id(nested_fields))
+        if anonymous_name is None:
+            anonymous_name = f"_AnonymousInlineModel{len(anonymous_models) + 1}"
+            anonymous_models[id(nested_fields)] = anonymous_name
+            self.api.model(anonymous_name, nested_fields)
+
+        return self.api.models[anonymous_name]
+
+    def register_model_with_inline_dict_support(self: Swagger, model: object) -> dict[str, str]:
+        if isinstance(model, dict):
+            model = get_or_create_inline_model(self, model)
+
+        return _ORIGINAL_REGISTER_MODEL(self, model)
+
+    def register_field_with_inline_dict_support(self: Swagger, field: object) -> None:
+        nested = getattr(field, "nested", None)
+        if isinstance(nested, dict):
+            field.model = get_or_create_inline_model(self, nested)  # type: ignore
+
+        _ORIGINAL_REGISTER_FIELD(self, field)
+
+    Swagger.register_model = register_model_with_inline_dict_support
+    Swagger.register_field = register_field_with_inline_dict_support
+    Swagger._dify_inline_nested_dict_patch = True
+
+
+def create_spec_app() -> Flask:
+    """Build a minimal Flask app that only mounts the Swagger-producing blueprints."""
+
+    _apply_runtime_defaults()
+    _patch_swagger_for_inline_nested_dicts()
+
+    app = Flask(__name__)
+
+    from controllers.console import bp as console_bp
+    from controllers.service_api import bp as service_api_bp
+    from controllers.web import bp as web_bp
+
+    app.register_blueprint(console_bp)
+    app.register_blueprint(web_bp)
+    app.register_blueprint(service_api_bp)
+
+    return app
+
+
+def generate_specs(output_dir: Path) -> list[Path]:
+    """Write all Swagger specs to `output_dir` and return the written paths."""
+
+    output_dir.mkdir(parents=True, exist_ok=True)
+
+    app = create_spec_app()
+    client = app.test_client()
+
+    written_paths: list[Path] = []
+    for target in SPEC_TARGETS:
+        response = client.get(target.route)
+        if response.status_code != 200:
+            raise RuntimeError(f"failed to fetch {target.route}: {response.status_code}")
+
+        payload = response.get_json()
+        if not isinstance(payload, dict):
+            raise RuntimeError(f"unexpected response payload for {target.route}")
+
+        output_path = output_dir / target.filename
+        output_path.write_text(json.dumps(payload, indent=2, sort_keys=True) + "\n", encoding="utf-8")
+        written_paths.append(output_path)
+
+    return written_paths
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        "-o",
+        "--output-dir",
+        type=Path,
+        default=Path("openapi"),
+        help="Directory where the Swagger JSON files will be written.",
+    )
+    return parser.parse_args()
+
+
+def main() -> int:
+    args = parse_args()
+    written_paths = generate_specs(args.output_dir)
+
+    for path in written_paths:
+        logger.debug(path)
+
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

api/tests/unit_tests/commands/test_generate_swagger_specs.py

@@ -0,0 +1,37 @@
+"""Unit tests for the standalone Swagger export helper."""
+
+import importlib.util
+import json
+import sys
+from pathlib import Path
+
+
+def _load_generate_swagger_specs_module():
+    api_dir = Path(__file__).resolve().parents[3]
+    script_path = api_dir / "dev" / "generate_swagger_specs.py"
+
+    spec = importlib.util.spec_from_file_location("generate_swagger_specs", script_path)
+    assert spec
+    assert spec.loader
+
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[spec.name] = module
+    spec.loader.exec_module(module)  # type: ignore[attr-defined]
+    return module
+
+
+def test_generate_specs_writes_console_web_and_service_swagger_files(tmp_path):
+    module = _load_generate_swagger_specs_module()
+
+    written_paths = module.generate_specs(tmp_path)
+
+    assert [path.name for path in written_paths] == [
+        "console-swagger.json",
+        "web-swagger.json",
+        "service-swagger.json",
+    ]
+
+    for path in written_paths:
+        payload = json.loads(path.read_text(encoding="utf-8"))
+        assert payload["swagger"] == "2.0"
+        assert "paths" in payload