#
# This file is part of Nominatim. (https://nominatim.org)
#
-# Copyright (C) 2022 by the Nominatim developer community.
+# Copyright (C) 2023 by the Nominatim developer community.
# For a full list of authors see the git log.
"""
Server implementation using the falcon webserver framework.
"""
-from typing import Type, Any, Optional, Mapping
+from typing import Optional, Mapping, cast, Any
from pathlib import Path
-import falcon
-import falcon.asgi
+from falcon.asgi import App, Request, Response
from nominatim.api import NominatimAPIAsync
-from nominatim.apicmd.status import StatusResult
-import nominatim.result_formatter.v1 as formatting
+import nominatim.api.v1 as api_impl
+from nominatim.config import Configuration
+
+class HTTPNominatimError(Exception):
+ """ A special exception class for errors raised during processing.
+ """
+ def __init__(self, msg: str, status: int, content_type: str) -> None:
+ self.msg = msg
+ self.status = status
+ self.content_type = content_type
-CONTENT_TYPE = {
- 'text': falcon.MEDIA_TEXT,
- 'xml': falcon.MEDIA_XML
-}
-class NominatimV1:
- """ Implementation of V1 version of the Nominatim API.
+async def nominatim_error_handler(req: Request, resp: Response, #pylint: disable=unused-argument
+ exception: HTTPNominatimError,
+ _: Any) -> None:
+ """ Special error handler that passes message and content type as
+ per exception info.
"""
+ resp.status = exception.status
+ resp.text = exception.msg
+ resp.content_type = exception.content_type
- def __init__(self, project_dir: Path, environ: Optional[Mapping[str, str]]) -> None:
- self.api = NominatimAPIAsync(project_dir, environ)
- self.formatters = {}
- for rtype in (StatusResult, ):
- self.formatters[rtype] = formatting.create(rtype)
+class ParamWrapper(api_impl.ASGIAdaptor):
+ """ Adaptor class for server glue to Falcon framework.
+ """
+ def __init__(self, req: Request, resp: Response,
+ config: Configuration) -> None:
+ self.request = req
+ self.response = resp
+ self._config = config
- def parse_format(self, req: falcon.asgi.Request, rtype: Type[Any], default: str) -> None:
- """ Get and check the 'format' parameter and prepare the formatter.
- `rtype` describes the expected return type and `default` the
- format value to assume when no parameter is present.
- """
- req.context.format = req.get_param('format', default=default)
- req.context.formatter = self.formatters[rtype]
- if not req.context.formatter.supports_format(req.context.format):
- raise falcon.HTTPBadRequest(
- description="Parameter 'format' must be one of: " +
- ', '.join(req.context.formatter.list_formats()))
+ def get(self, name: str, default: Optional[str] = None) -> Optional[str]:
+ return cast(Optional[str], self.request.get_param(name, default=default))
- def format_response(self, req: falcon.asgi.Request, resp: falcon.asgi.Response,
- result: Any) -> None:
- """ Render response into a string according to the formatter
- set in `parse_format()`.
- """
- resp.text = req.context.formatter.format(result, req.context.format)
- resp.content_type = CONTENT_TYPE.get(req.context.format, falcon.MEDIA_JSON)
+ def get_header(self, name: str, default: Optional[str] = None) -> Optional[str]:
+ return cast(Optional[str], self.request.get_header(name, default=default))
- async def on_get_status(self, req: falcon.asgi.Request, resp: falcon.asgi.Response) -> None:
- """ Implementation of status endpoint.
- """
- self.parse_format(req, StatusResult, 'text')
+ def error(self, msg: str, status: int = 400) -> HTTPNominatimError:
+ return HTTPNominatimError(msg, status, self.content_type)
+
+
+ def create_response(self, status: int, output: str) -> None:
+ self.response.status = status
+ self.response.text = output
+ self.response.content_type = self.content_type
- result = await self.api.status()
- self.format_response(req, resp, result)
+ def config(self) -> Configuration:
+ return self._config
+
+
+class EndpointWrapper:
+ """ Converter for server glue endpoint functions to Falcon request handlers.
+ """
+
+ def __init__(self, func: api_impl.EndpointFunc, api: NominatimAPIAsync) -> None:
+ self.func = func
+ self.api = api
+
+
+ async def on_get(self, req: Request, resp: Response) -> None:
+ """ Implementation of the endpoint.
+ """
+ await self.func(self.api, ParamWrapper(req, resp, self.api.config))
def get_application(project_dir: Path,
- environ: Optional[Mapping[str, str]] = None) -> falcon.asgi.App:
- """ Create a Nominatim falcon ASGI application.
+ environ: Optional[Mapping[str, str]] = None) -> App:
+ """ Create a Nominatim Falcon ASGI application.
"""
- app = falcon.asgi.App()
+ api = NominatimAPIAsync(project_dir, environ)
- api = NominatimV1(project_dir, environ)
+ app = App(cors_enable=api.config.get_bool('CORS_NOACCESSCONTROL'))
+ app.add_error_handler(HTTPNominatimError, nominatim_error_handler)
- app.add_route('/status', api, suffix='status')
+ legacy_urls = api.config.get_bool('SERVE_LEGACY_URLS')
+ for name, func in api_impl.ROUTES:
+ endpoint = EndpointWrapper(func, api)
+ app.add_route(f"/{name}", endpoint)
+ if legacy_urls:
+ app.add_route(f"/{name}.php", endpoint)
return app
+
+
+def run_wsgi() -> App:
+ """ Entry point for uvicorn.
+
+ Make sure uvicorn is run from the project directory.
+ """
+ return get_application(Path('.'))
projects / nominatim.git / blobdiff