X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/1adb0a9886b298fe351f181d6da413e5c261c9f7..13a17754a4adb1318869d09534d0c1124da68682:/nominatim/server/starlette/server.py diff --git a/nominatim/server/starlette/server.py b/nominatim/server/starlette/server.py index bfc552f2..33ab22c7 100644 --- a/nominatim/server/starlette/server.py +++ b/nominatim/server/starlette/server.py @@ -2,63 +2,164 @@ # # 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 starlette webserver framework. """ +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 -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 -CONTENT_TYPE = { - 'text': 'text/plain; charset=utf-8', - 'xml': 'text/xml; charset=utf-8' -} +class ParamWrapper(api_impl.ASGIAdaptor): + """ Adaptor class for server glue to Starlette framework. + """ -FORMATTERS = { - StatusResult: formatting.create(StatusResult) -} + def __init__(self, request: Request) -> None: + self.request = request -def parse_format(request, rtype, default): - fmt = request.query_params.get('format', default=default) - fmtter = FORMATTERS[rtype] + def get(self, name: str, default: Optional[str] = None) -> Optional[str]: + return self.request.query_params.get(name, default=default) - if not fmtter.supports_format(fmt): - raise HTTPException(400, detail="Parameter 'format' must be one of: " + - ', '.join(fmtter.list_formats())) - request.state.format = fmt - request.state.formatter = fmtter + def get_header(self, name: str, default: Optional[str] = None) -> Optional[str]: + return self.request.headers.get(name, default) -def format_response(request, result): - fmt = request.state.format - return Response(request.state.formatter.format(result, fmt), - media_type=CONTENT_TYPE.get(fmt, 'application/json')) + def error(self, msg: str, status: int = 400) -> HTTPException: + return HTTPException(status, detail=msg, + headers={'content-type': self.content_type}) -async def on_status(request): - parse_format(request, StatusResult, 'text') - result = await request.app.state.API.status() - return format_response(request, result) + 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) -V1_ROUTES = [ - Route('/status', endpoint=on_status) -] + 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}" -def get_application(project_dir: Path) -> Starlette: - app = Starlette(debug=True, routes=V1_ROUTES) + return f"{scheme}://{host}{root}" - app.state.API = NominatimAPIAsync(project_dir) + + 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: + return cast(Response, await func(request.app.state.API, ParamWrapper(request))) + + return _callback + + +class FileLoggingMiddleware(BaseHTTPMiddleware): + """ Middleware to log selected requests into a file. + """ + + 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') + + 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) + + +def get_application(project_dir: Path, + environ: Optional[Mapping[str, str]] = None, + debug: bool = True) -> Starlette: + """ Create a Nominatim falcon ASGI application. + """ + 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)