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]:
@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
"""
- 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"""<?xml version="1.0" encoding="UTF-8" ?>
+ <error>
+ <code>{status}</code>
+ <message>{msg}</message>
+ </error>
+ """
+ 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:
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:
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:
"""
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),
+ 'single_result': 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)
]
projects / nominatim.git / blobdiff