X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/104722a56a4773eae275b25987b4d340f19d35bb..6c67a4b500cf08b3cfce96e74b2658deb4696c05:/nominatim/api/v1/server_glue.py diff --git a/nominatim/api/v1/server_glue.py b/nominatim/api/v1/server_glue.py index 52ce747c..a87b6825 100644 --- a/nominatim/api/v1/server_glue.py +++ b/nominatim/api/v1/server_glue.py @@ -8,23 +8,27 @@ Generic part of the server implementation of the v1 API. Combine with the scaffolding provided for the various Python ASGI frameworks. """ -from typing import Optional, Any, Type, Callable +from typing import Optional, Any, Type, Callable, NoReturn, cast +from functools import reduce import abc +import math +from nominatim.config import Configuration import nominatim.api as napi +import nominatim.api.logging as loglib from nominatim.api.v1.format import dispatch as formatting CONTENT_TYPE = { 'text': 'text/plain; charset=utf-8', 'xml': 'text/xml; charset=utf-8', - 'jsonp': 'application/javascript' + 'debug': 'text/html; charset=utf-8' } - class ASGIAdaptor(abc.ABC): """ Adapter class for the different ASGI frameworks. Wraps functionality over concrete requests and responses. """ + content_type: str = 'text/plain; charset=utf-8' @abc.abstractmethod def get(self, name: str, default: Optional[str] = None) -> Optional[str]: @@ -40,14 +44,14 @@ 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. """ @abc.abstractmethod - def create_response(self, status: int, output: str, content_type: str) -> Any: + def create_response(self, status: int, output: str) -> Any: """ Create a response from the given parameters. The result will be returned by the endpoint functions. The adaptor may also return None when the response is created internally with some @@ -59,20 +63,48 @@ class ASGIAdaptor(abc.ABC): """ - def build_response(self, output: str, media_type: str, status: int = 200) -> Any: + @abc.abstractmethod + def config(self) -> Configuration: + """ Return the current configuration object. + """ + + + def build_response(self, output: str, status: int = 200) -> Any: """ Create a response from the given output. Wraps a JSONP function around the response, if necessary. """ - if media_type == 'json' and status == 200: + if self.content_type == 'application/json' and status == 200: jsonp = self.get('json_callback') if jsonp is not None: if any(not part.isidentifier() for part in jsonp.split('.')): - raise self.error('Invalid json_callback value') + self.raise_error('Invalid json_callback value') output = f"{jsonp}({output})" - media_type = 'jsonp' + self.content_type = 'application/javascript' + + return self.create_response(status, output) - return self.create_response(status, output, - CONTENT_TYPE.get(media_type, 'application/json')) + + def raise_error(self, msg: str, status: int = 400) -> NoReturn: + """ Raise an exception resulting in the given HTTP status and + message. The message will be formatted according to the + output format chosen by the request. + """ + if self.content_type == 'text/xml; charset=utf-8': + msg = f""" + + {status} + {msg} + + """ + elif self.content_type == 'application/json': + msg = f"""{{"error":{{"code":{status},"message":"{msg}"}}}}""" + elif self.content_type == 'text/html; charset=utf-8': + loglib.log().section('Execution error') + loglib.log().var_dump('Status', status) + loglib.log().var_dump('Message', msg) + msg = loglib.get_and_disable() + + raise self.error(msg, status) def get_int(self, name: str, default: Optional[int] = None) -> int: @@ -89,12 +121,41 @@ class ASGIAdaptor(abc.ABC): if default is not None: return default - raise self.error(f"Parameter '{name}' missing.") + self.raise_error(f"Parameter '{name}' missing.") + + try: + intval = int(value) + except ValueError: + self.raise_error(f"Parameter '{name}' must be a number.") + + return intval + + + def get_float(self, name: str, default: Optional[float] = None) -> float: + """ Return an input parameter as a flaoting-point number. Raises an + exception if the parameter is given but not in an float format. + + If 'default' is given, then it will be returned when the parameter + is missing completely. When 'default' is None, an error will be + raised on a missing parameter. + """ + value = self.get(name) + + if value is None: + if default is not None: + return default + + self.raise_error(f"Parameter '{name}' missing.") try: - return int(value) - except ValueError as exc: - raise self.error(f"Parameter '{name}' must be a number.") from exc + fval = float(value) + except ValueError: + self.raise_error(f"Parameter '{name}' must be a number.") + + if math.isnan(fval) or math.isinf(fval): + self.raise_error(f"Parameter '{name}' must be a number.") + + return fval def get_bool(self, name: str, default: Optional[bool] = None) -> bool: @@ -111,24 +172,58 @@ class ASGIAdaptor(abc.ABC): if default is not None: return default - raise self.error(f"Parameter '{name}' missing.") + self.raise_error(f"Parameter '{name}' missing.") return value != '0' -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 - format value to assume when no parameter is present. - """ - fmt = params.get('format', default=default) - assert fmt is not None + def get_accepted_languages(self) -> str: + """ Return the accepted languages. + """ + return self.get('accept-language')\ + or self.get_header('http_accept_language')\ + or self.config().DEFAULT_LANGUAGE + - if not formatting.supports_format(result_type, fmt): - raise params.error("Parameter 'format' must be one of: " + - ', '.join(formatting.list_formats(result_type))) + def setup_debugging(self) -> bool: + """ Set up collection of debug information if requested. - return fmt + Return True when debugging was requested. + """ + if self.get_bool('debug', False): + loglib.set_log_output('html') + self.content_type = 'text/html; charset=utf-8' + return True + + return False + + + def get_layers(self) -> Optional[napi.DataLayer]: + """ Return a parsed version of the layer parameter. + """ + param = self.get('layer', None) + if param is None: + return None + + return cast(napi.DataLayer, + reduce(napi.DataLayer.__or__, + (getattr(napi.DataLayer, s.upper()) for s in param.split(',')))) + + + def parse_format(self, result_type: Type[Any], default: str) -> str: + """ Get and check the 'format' parameter and prepare the formatter. + `result_type` is the type of result to be returned by the function + and `default` the format value to assume when no parameter is present. + """ + fmt = self.get('format', default=default) + assert fmt is not None + + if not formatting.supports_format(result_type, fmt): + self.raise_error("Parameter 'format' must be one of: " + + ', '.join(formatting.list_formats(result_type))) + + self.content_type = CONTENT_TYPE.get(fmt, 'application/json') + return fmt async def status_endpoint(api: napi.NominatimAPIAsync, params: ASGIAdaptor) -> Any: @@ -136,18 +231,131 @@ async def status_endpoint(api: napi.NominatimAPIAsync, params: ASGIAdaptor) -> A """ result = await api.status() - fmt = parse_format(params, napi.StatusResult, 'text') + fmt = params.parse_format(napi.StatusResult, 'text') if fmt == 'text' and result.status: status_code = 500 else: status_code = 200 - return params.build_response(formatting.format_result(result, fmt, {}), fmt, + return params.build_response(formatting.format_result(result, fmt, {}), status=status_code) + +async def details_endpoint(api: napi.NominatimAPIAsync, params: ASGIAdaptor) -> Any: + """ Server glue for /details endpoint. See API docs for details. + """ + fmt = params.parse_format(napi.DetailedResult, 'json') + 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: + params.raise_error("Missing ID parameter 'place_id' or 'osmtype'.") + place = napi.OsmID(osmtype, params.get_int('osmid'), params.get('class')) + + debug = params.setup_debugging() + + 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()) + + result = await api.lookup(place, details) + + if debug: + return params.build_response(loglib.get_and_disable()) + + if result is None: + params.raise_error('No place with that OSM ID found.', status=404) + + output = formatting.format_result(result, fmt, + {'locales': locales, + 'group_hierarchy': params.get_bool('group_hierarchy', False), + 'icon_base_url': params.config().MAPICON_URL}) + + return params.build_response(output) + + +async def reverse_endpoint(api: napi.NominatimAPIAsync, params: ASGIAdaptor) -> Any: + """ Server glue for /reverse endpoint. See API docs for details. + """ + fmt = params.parse_format(napi.ReverseResults, 'xml') + debug = params.setup_debugging() + coord = napi.Point(params.get_float('lon'), params.get_float('lat')) + locales = napi.Locales.from_accept_languages(params.get_accepted_languages()) + + zoom = max(0, min(18, params.get_int('zoom', 18))) + + details = napi.LookupDetails(address_details=True, + geometry_simplification=params.get_float('polygon_threshold', 0.0)) + numgeoms = 0 + if params.get_bool('polygon_geojson', False): + details.geometry_output |= napi.GeometryFormat.GEOJSON + numgeoms += 1 + if fmt not in ('geojson', 'geocodejson'): + if params.get_bool('polygon_text', False): + details.geometry_output |= napi.GeometryFormat.TEXT + numgeoms += 1 + if params.get_bool('polygon_kml', False): + details.geometry_output |= napi.GeometryFormat.KML + numgeoms += 1 + if params.get_bool('polygon_svg', False): + details.geometry_output |= napi.GeometryFormat.SVG + numgeoms += 1 + + if numgeoms > params.config().get_int('POLYGON_OUTPUT_MAX_TYPES'): + params.raise_error('Too many polgyon output options selected.') + + result = await api.reverse(coord, REVERSE_MAX_RANKS[zoom], + params.get_layers() or + napi.DataLayer.ADDRESS | napi.DataLayer.POI, + details) + + if debug: + return params.build_response(loglib.get_and_disable()) + + fmt_options = {'locales': locales, + 'extratags': params.get_bool('extratags', False), + 'namedetails': params.get_bool('namedetails', False), + 'addressdetails': params.get_bool('addressdetails', True)} + if fmt == 'xml': + fmt_options['xml_roottag'] = 'reversegeocode' + fmt_options['xml_extra_info'] = {'querystring': 'TODO'} + + output = formatting.format_result(napi.ReverseResults([result] if result else []), + fmt, fmt_options) + + return params.build_response(output) + + EndpointFunc = Callable[[napi.NominatimAPIAsync, ASGIAdaptor], Any] +REVERSE_MAX_RANKS = [2, 2, 2, # 0-2 Continent/Sea + 4, 4, # 3-4 Country + 8, # 5 State + 10, 10, # 6-7 Region + 12, 12, # 8-9 County + 16, 17, # 10-11 City + 18, # 12 Town + 19, # 13 Village/Suburb + 22, # 14 Hamlet/Neighbourhood + 25, # 15 Localities + 26, # 16 Major Streets + 27, # 17 Minor Streets + 30 # 18 Building + ] + + ROUTES = [ - ('status', status_endpoint) + ('status', status_endpoint), + ('details', details_endpoint), + ('reverse', reverse_endpoint) ]