implement details endpoint in Python servers

nominatim/api/v1/server_glue.py

@@ -11,6 +11,7 @@ Combine with the scaffolding provided for the various Python ASGI frameworks.
 from typing import Optional, Any, Type, Callable
 import abc
 
+from nominatim.config import Configuration
 import nominatim.api as napi
 from nominatim.api.v1.format import dispatch as formatting
 
@@ -40,9 +41,9 @@ class ASGIAdaptor(abc.ABC):
 
 
     @abc.abstractmethod
-    def error(self, msg: str) -> Exception:
+    def error(self, msg: str, status: int = 400) -> Exception:
         """ Construct an appropriate exception from the given error message.
-            The exception must result in a HTTP 400 error.
+            The exception must result in a HTTP error with the given status.
         """
 
 
@@ -59,6 +60,12 @@ class ASGIAdaptor(abc.ABC):
         """
 
 
+    @abc.abstractmethod
+    def config(self) -> Configuration:
+        """ Return the current configuration object.
+        """
+
+
     def build_response(self, output: str, media_type: str, status: int = 200) -> Any:
         """ Create a response from the given output. Wraps a JSONP function
             around the response, if necessary.
@@ -116,6 +123,14 @@ class ASGIAdaptor(abc.ABC):
         return value != '0'
 
 
+    def get_accepted_languages(self) -> str:
+        """ Return the accepted langauges.
+        """
+        return self.get('accept-language')\
+               or self.get_header('http_accept_language')\
+               or self.config().DEFAULT_LANGUAGE
+
+
 def parse_format(params: ASGIAdaptor, result_type: Type[Any], default: str) -> str:
     """ Get and check the 'format' parameter and prepare the formatter.
         `fmtter` is a formatter and `default` the
@@ -146,8 +161,49 @@ async def status_endpoint(api: napi.NominatimAPIAsync, params: ASGIAdaptor) -> A
     return params.build_response(formatting.format_result(result, fmt, {}), fmt,
                                  status=status_code)
 
+
+async def details_endpoint(api: napi.NominatimAPIAsync, params: ASGIAdaptor) -> Any:
+    """ Server glue for /details endpoint. See API docs for details.
+    """
+    place_id = params.get_int('place_id', 0)
+    place: napi.PlaceRef
+    if place_id:
+        place = napi.PlaceID(place_id)
+    else:
+        osmtype = params.get('osmtype')
+        if osmtype is None:
+            raise params.error("Missing ID parameter 'place_id' or 'osmtype'.")
+        place = napi.OsmID(osmtype, params.get_int('osmid'), params.get('class'))
+
+    details = napi.LookupDetails(address_details=params.get_bool('addressdetails', False),
+                                 linked_places=params.get_bool('linkedplaces', False),
+                                 parented_places=params.get_bool('hierarchy', False),
+                                 keywords=params.get_bool('keywords', False))
+
+    if params.get_bool('polygon_geojson', False):
+        details.geometry_output = napi.GeometryFormat.GEOJSON
+
+    locales = napi.Locales.from_accept_languages(params.get_accepted_languages())
+    print(locales.languages)
+
+    result = await api.lookup(place, details)
+
+    if result is None:
+        raise params.error('No place with that OSM ID found.', status=404)
+
+    output = formatting.format_result(
+                 result,
+                 'details-json',
+                 {'locales': locales,
+                  'group_hierarchy': params.get_bool('group_hierarchy', False),
+                  'icon_base_url': params.config().MAPICON_URL})
+
+    return params.build_response(output, 'json')
+
+
 EndpointFunc = Callable[[napi.NominatimAPIAsync, ASGIAdaptor], Any]
 
 ROUTES = [
-    ('status', status_endpoint)
+    ('status', status_endpoint),
+    ('details', details_endpoint)
 ]

nominatim/server/falcon/server.py

@@ -15,15 +15,18 @@ from falcon.asgi import App, Request, Response
 
 from nominatim.api import NominatimAPIAsync
 import nominatim.api.v1 as api_impl
+from nominatim.config import Configuration
 
 
 class ParamWrapper(api_impl.ASGIAdaptor):
     """ Adaptor class for server glue to Falcon framework.
     """
 
-    def __init__(self, req: Request, resp: Response) -> None:
+    def __init__(self, req: Request, resp: Response,
+                 config: Configuration) -> None:
         self.request = req
         self.response = resp
+        self._config = config
 
 
     def get(self, name: str, default: Optional[str] = None) -> Optional[str]:
@@ -34,8 +37,13 @@ class ParamWrapper(api_impl.ASGIAdaptor):
         return cast(Optional[str], self.request.get_header(name, default=default))
 
 
-    def error(self, msg: str) -> falcon.HTTPBadRequest:
-        return falcon.HTTPBadRequest(description=msg)
+    def error(self, msg: str, status: int = 400) -> falcon.HTTPError:
+        if status == 400:
+            return falcon.HTTPBadRequest(description=msg)
+        if status == 404:
+            return falcon.HTTPNotFound(description=msg)
+
+        return falcon.HTTPError(status, description=msg)
 
 
     def create_response(self, status: int, output: str, content_type: str) -> None:
@@ -44,6 +52,10 @@ class ParamWrapper(api_impl.ASGIAdaptor):
         self.response.content_type = content_type
 
 
+    def config(self) -> Configuration:
+        return self._config
+
+
 class EndpointWrapper:
     """ Converter for server glue endpoint functions to Falcon request handlers.
     """
@@ -56,7 +68,7 @@ class EndpointWrapper:
     async def on_get(self, req: Request, resp: Response) -> None:
         """ Implementation of the endpoint.
         """
-        await self.func(self.api, ParamWrapper(req, resp))
+        await self.func(self.api, ParamWrapper(req, resp, self.api.config))
 
 
 def get_application(project_dir: Path,

nominatim/server/sanic/server.py

@@ -16,6 +16,7 @@ from sanic.response import text as TextResponse
 
 from nominatim.api import NominatimAPIAsync
 import nominatim.api.v1 as api_impl
+from nominatim.config import Configuration
 
 class ParamWrapper(api_impl.ASGIAdaptor):
     """ Adaptor class for server glue to Sanic framework.
@@ -33,8 +34,8 @@ class ParamWrapper(api_impl.ASGIAdaptor):
         return cast(Optional[str], self.request.headers.get(name, default))
 
 
-    def error(self, msg: str) -> SanicException:
-        return SanicException(msg, status_code=400)
+    def error(self, msg: str, status: int = 400) -> SanicException:
+        return SanicException(msg, status_code=status)
 
 
     def create_response(self, status: int, output: str,
@@ -42,6 +43,10 @@ class ParamWrapper(api_impl.ASGIAdaptor):
         return TextResponse(output, status=status, content_type=content_type)
 
 
+    def config(self) -> Configuration:
+        return cast(Configuration, self.request.app.ctx.api.config)
+
+
 def _wrap_endpoint(func: api_impl.EndpointFunc)\
        -> Callable[[Request], Coroutine[Any, Any, HTTPResponse]]:
     async def _callback(request: Request) -> HTTPResponse:

nominatim/server/starlette/server.py

@@ -18,9 +18,9 @@ from starlette.requests import Request
 from starlette.middleware import Middleware
 from starlette.middleware.cors import CORSMiddleware
 
-from nominatim.config import Configuration
 from nominatim.api import NominatimAPIAsync
 import nominatim.api.v1 as api_impl
+from nominatim.config import Configuration
 
 class ParamWrapper(api_impl.ASGIAdaptor):
     """ Adaptor class for server glue to Starlette framework.
@@ -38,14 +38,18 @@ class ParamWrapper(api_impl.ASGIAdaptor):
         return self.request.headers.get(name, default)
 
 
-    def error(self, msg: str) -> HTTPException:
-        return HTTPException(400, detail=msg)
+    def error(self, msg: str, status: int = 400) -> HTTPException:
+        return HTTPException(status, detail=msg)
 
 
     def create_response(self, status: int, output: str, content_type: str) -> Response:
         return Response(output, status_code=status, media_type=content_type)
 
 
+    def config(self) -> Configuration:
+        return cast(Configuration, self.request.app.state.API.config)
+
+
 def _wrap_endpoint(func: api_impl.EndpointFunc)\
         -> Callable[[Request], Coroutine[Any, Any, Response]]:
     async def _callback(request: Request) -> Response: