"""
Server implementation using the starlette webserver framework.
"""
-from typing import Any, Type, Optional, Mapping
+from typing import Any, Optional, Mapping, Callable, cast, Coroutine, Dict, Awaitable
from pathlib import Path
+import datetime as dt
from starlette.applications import Starlette
from starlette.routing import Route
from starlette.exceptions import HTTPException
-from starlette.responses import Response
+from starlette.responses import Response, PlainTextResponse
from starlette.requests import Request
+from starlette.middleware import Middleware
+from starlette.middleware.base import BaseHTTPMiddleware, RequestResponseEndpoint
+from starlette.middleware.cors import CORSMiddleware
-from nominatim.api import NominatimAPIAsync, StatusResult
+from nominatim.api import NominatimAPIAsync
import nominatim.api.v1 as api_impl
+from nominatim.config import Configuration
-CONTENT_TYPE = {
- 'text': 'text/plain; charset=utf-8',
- 'xml': 'text/xml; charset=utf-8'
-}
-
-def parse_format(request: 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.
+class ParamWrapper(api_impl.ASGIAdaptor):
+ """ Adaptor class for server glue to Starlette framework.
"""
- fmt = request.query_params.get('format', default=default)
- if not api_impl.supports_format(rtype, fmt):
- raise HTTPException(400, detail="Parameter 'format' must be one of: " +
- ', '.join(api_impl.list_formats(rtype)))
+ def __init__(self, request: Request) -> None:
+ self.request = request
- request.state.format = fmt
+ def get(self, name: str, default: Optional[str] = None) -> Optional[str]:
+ return self.request.query_params.get(name, default=default)
+
+
+ def get_header(self, name: str, default: Optional[str] = None) -> Optional[str]:
+ return self.request.headers.get(name, default)
+
+
+ def error(self, msg: str, status: int = 400) -> HTTPException:
+ return HTTPException(status, detail=msg,
+ headers={'content-type': self.content_type})
+
+
+ def create_response(self, status: int, output: str, num_results: int) -> Response:
+ self.request.state.num_results = num_results
+ return Response(output, status_code=status, media_type=self.content_type)
+
+
+ def base_uri(self) -> str:
+ scheme = self.request.url.scheme
+ host = self.request.url.hostname
+ port = self.request.url.port
+ root = self.request.scope['root_path']
+ if (scheme == 'http' and port == 80) or (scheme == 'https' and port == 443):
+ port = None
+ if port is not None:
+ return f"{scheme}://{host}:{port}{root}"
+
+ return f"{scheme}://{host}{root}"
+
+
+ def config(self) -> Configuration:
+ return cast(Configuration, self.request.app.state.API.config)
-def format_response(request: Request, result: Any) -> Response:
- """ Render response into a string according.
- """
- fmt = request.state.format
- return Response(api_impl.format_result(result, fmt),
- media_type=CONTENT_TYPE.get(fmt, 'application/json'))
+def _wrap_endpoint(func: api_impl.EndpointFunc)\
+ -> Callable[[Request], Coroutine[Any, Any, Response]]:
+ async def _callback(request: Request) -> Response:
+ return cast(Response, await func(request.app.state.API, ParamWrapper(request)))
-async def on_status(request: Request) -> Response:
- """ Implementation of status endpoint.
+ return _callback
+
+
+class FileLoggingMiddleware(BaseHTTPMiddleware):
+ """ Middleware to log selected requests into a file.
"""
- parse_format(request, StatusResult, 'text')
- result = await request.app.state.API.status()
- response = format_response(request, result)
- if request.state.format == 'text' and result.status:
- response.status_code = 500
+ def __init__(self, app: Starlette, file_name: str = ''):
+ super().__init__(app)
+ self.fd = open(file_name, 'a', buffering=1, encoding='utf8') # pylint: disable=R1732
+
+ async def dispatch(self, request: Request,
+ call_next: RequestResponseEndpoint) -> Response:
+ start = dt.datetime.now(tz=dt.timezone.utc)
+ response = await call_next(request)
+
+ if response.status_code != 200:
+ return response
+
+ finish = dt.datetime.now(tz=dt.timezone.utc)
+
+ for endpoint in ('reverse', 'search', 'lookup', 'details'):
+ if request.url.path.startswith('/' + endpoint):
+ qtype = endpoint
+ break
+ else:
+ return response
+
+ duration = (finish - start).total_seconds()
+ params = request.scope['query_string'].decode('utf8')
- return response
+ self.fd.write(f"[{start.replace(tzinfo=None).isoformat(sep=' ', timespec='milliseconds')}] "
+ f"{duration:.4f} {getattr(request.state, 'num_results', 0)} "
+ f'{qtype} "{params}"\n')
+ return response
+
+
+async def timeout_error(request: Request, #pylint: disable=unused-argument
+ _: Exception) -> Response:
+ """ Error handler for query timeouts.
+ """
+ return PlainTextResponse("Query took too long to process.", status_code=503)
-V1_ROUTES = [
- Route('/status', endpoint=on_status)
-]
def get_application(project_dir: Path,
- environ: Optional[Mapping[str, str]] = None) -> Starlette:
+ environ: Optional[Mapping[str, str]] = None,
+ debug: bool = True) -> Starlette:
""" Create a Nominatim falcon ASGI application.
"""
- app = Starlette(debug=True, routes=V1_ROUTES)
+ config = Configuration(project_dir, environ)
+
+ routes = []
+ legacy_urls = config.get_bool('SERVE_LEGACY_URLS')
+ for name, func in api_impl.ROUTES:
+ endpoint = _wrap_endpoint(func)
+ routes.append(Route(f"/{name}", endpoint=endpoint))
+ if legacy_urls:
+ routes.append(Route(f"/{name}.php", endpoint=endpoint))
+
+ middleware = []
+ if config.get_bool('CORS_NOACCESSCONTROL'):
+ middleware.append(Middleware(CORSMiddleware,
+ allow_origins=['*'],
+ allow_methods=['GET', 'OPTIONS'],
+ max_age=86400))
+
+ log_file = config.LOG_FILE
+ if log_file:
+ middleware.append(Middleware(FileLoggingMiddleware, file_name=log_file))
+
+ exceptions: Dict[Any, Callable[[Request, Exception], Awaitable[Response]]] = {
+ TimeoutError: timeout_error
+ }
+
+ async def _shutdown() -> None:
+ await app.state.API.close()
+
+ app = Starlette(debug=debug, routes=routes, middleware=middleware,
+ exception_handlers=exceptions,
+ on_shutdown=[_shutdown])
app.state.API = NominatimAPIAsync(project_dir, environ)
return app
+
+
+def run_wsgi() -> Starlette:
+ """ Entry point for uvicorn.
+ """
+ return get_application(Path('.'), debug=False)
projects / nominatim.git / blobdiff