1 # SPDX-License-Identifier: GPL-2.0-only
3 # This file is part of Nominatim. (https://nominatim.org)
5 # Copyright (C) 2022 by the Nominatim developer community.
6 # For a full list of authors see the git log.
8 Classes wrapping HTTP responses from the Nominatim API.
10 from collections import OrderedDict
13 import xml.etree.ElementTree as ET
15 from check_functions import Almost
17 OSM_TYPE = {'N' : 'node', 'W' : 'way', 'R' : 'relation',
18 'n' : 'node', 'w' : 'way', 'r' : 'relation',
19 'node' : 'n', 'way' : 'w', 'relation' : 'r'}
21 def _geojson_result_to_json_result(geojson_result):
22 result = geojson_result['properties']
23 result['geojson'] = geojson_result['geometry']
24 if 'bbox' in geojson_result:
25 # bbox is minlon, minlat, maxlon, maxlat
26 # boundingbox is minlat, maxlat, minlon, maxlon
27 result['boundingbox'] = [geojson_result['bbox'][1],
28 geojson_result['bbox'][3],
29 geojson_result['bbox'][0],
30 geojson_result['bbox'][2]]
33 class BadRowValueAssert:
34 """ Lazily formatted message for failures to find a field content.
37 def __init__(self, response, idx, field, value):
41 self.row = response.result[idx]
44 return "\nBad value for row {} field '{}'. Expected: {}, got: {}.\nFull row: {}"""\
45 .format(self.idx, self.field, self.value,
46 self.row[self.field], json.dumps(self.row, indent=4))
49 class GenericResponse:
50 """ Common base class for all API responses.
52 def __init__(self, page, fmt, errorcode=200):
59 self.errorcode = errorcode
63 if errorcode == 200 and fmt != 'debug':
64 getattr(self, '_parse_' + fmt)()
66 print("Bad response: ", page)
68 def _parse_json(self):
69 m = re.fullmatch(r'([\w$][^(]*)\((.*)\)', self.page)
74 self.header['json_func'] = m.group(1)
75 self.result = json.JSONDecoder(object_pairs_hook=OrderedDict).decode(code)
76 if isinstance(self.result, OrderedDict):
77 self.result = [self.result]
79 def _parse_geojson(self):
81 if 'error' in self.result[0]:
84 self.result = list(map(_geojson_result_to_json_result, self.result[0]['features']))
86 def _parse_geocodejson(self):
88 if self.result is not None:
89 self.result = [r['geocoding'] for r in self.result]
91 def assert_field(self, idx, field, value):
92 """ Check that result row `idx` has a field `field` with value `value`.
93 Float numbers are matched approximately. When the expected value
94 starts with a carat, regular expression matching is used.
96 assert field in self.result[idx], \
97 "Result row {} has no field '{}'.\nFull row: {}"\
98 .format(idx, field, json.dumps(self.result[idx], indent=4))
100 if isinstance(value, float):
101 assert Almost(value) == float(self.result[idx][field]), \
102 BadRowValueAssert(self, idx, field, value)
103 elif value.startswith("^"):
104 assert re.fullmatch(value, self.result[idx][field]), \
105 BadRowValueAssert(self, idx, field, value)
107 assert str(self.result[idx][field]) == str(value), \
108 BadRowValueAssert(self, idx, field, value)
110 def assert_address_field(self, idx, field, value):
111 """ Check that result rows`idx` has a field `field` with value `value`
112 in its address. If idx is None, then all results are checked.
115 todo = range(len(self.result))
120 assert 'address' in self.result[idx], \
121 "Result row {} has no field 'address'.\nFull row: {}"\
122 .format(idx, json.dumps(self.result[idx], indent=4))
124 address = self.result[idx]['address']
125 assert field in address, \
126 "Result row {} has no field '{}' in address.\nFull address: {}"\
127 .format(idx, field, json.dumps(address, indent=4))
129 assert address[field] == value, \
130 "\nBad value for row {} field '{}' in address. Expected: {}, got: {}.\nFull address: {}"""\
131 .format(idx, field, value, address[field], json.dumps(address, indent=4))
133 def match_row(self, row, context=None):
134 """ Match the result fields against the given behave table row.
136 if 'ID' in row.headings:
137 todo = [int(row['ID'])]
139 todo = range(len(self.result))
142 for name, value in zip(row.headings, row.cells):
146 assert 'osm_type' in self.result[i], \
147 "Result row {} has no field 'osm_type'.\nFull row: {}"\
148 .format(i, json.dumps(self.result[i], indent=4))
149 assert self.result[i]['osm_type'] in (OSM_TYPE[value[0]], value[0]), \
150 BadRowValueAssert(self, i, 'osm_type', value)
151 self.assert_field(i, 'osm_id', value[1:])
152 elif name == 'osm_type':
153 assert self.result[i]['osm_type'] in (OSM_TYPE[value[0]], value[0]), \
154 BadRowValueAssert(self, i, 'osm_type', value)
155 elif name == 'centroid':
157 lon, lat = value.split(' ')
158 elif context is not None:
159 lon, lat = context.osm.grid_node(int(value))
161 raise RuntimeError("Context needed when using grid coordinates")
162 self.assert_field(i, 'lat', float(lat))
163 self.assert_field(i, 'lon', float(lon))
165 self.assert_field(i, name, value)
167 def property_list(self, prop):
168 return [x[prop] for x in self.result]
171 class SearchResponse(GenericResponse):
172 """ Specialised class for search and lookup responses.
173 Transforms the xml response in a format similar to json.
176 def _parse_xml(self):
177 xml_tree = ET.fromstring(self.page)
179 self.header = dict(xml_tree.attrib)
181 for child in xml_tree:
182 assert child.tag == "place"
183 self.result.append(dict(child.attrib))
187 if sub.tag == 'extratags':
188 self.result[-1]['extratags'] = {}
190 self.result[-1]['extratags'][tag.attrib['key']] = tag.attrib['value']
191 elif sub.tag == 'namedetails':
192 self.result[-1]['namedetails'] = {}
194 self.result[-1]['namedetails'][tag.attrib['desc']] = tag.text
195 elif sub.tag == 'geokml':
196 self.result[-1][sub.tag] = True
198 address[sub.tag] = sub.text
201 self.result[-1]['address'] = address
204 class ReverseResponse(GenericResponse):
205 """ Specialised class for reverse responses.
206 Transforms the xml response in a format similar to json.
209 def _parse_xml(self):
210 xml_tree = ET.fromstring(self.page)
212 self.header = dict(xml_tree.attrib)
215 for child in xml_tree:
216 if child.tag == 'result':
217 assert not self.result, "More than one result in reverse result"
218 self.result.append(dict(child.attrib))
219 elif child.tag == 'addressparts':
222 address[sub.tag] = sub.text
223 self.result[0]['address'] = address
224 elif child.tag == 'extratags':
225 self.result[0]['extratags'] = {}
227 self.result[0]['extratags'][tag.attrib['key']] = tag.attrib['value']
228 elif child.tag == 'namedetails':
229 self.result[0]['namedetails'] = {}
231 self.result[0]['namedetails'][tag.attrib['desc']] = tag.text
232 elif child.tag == 'geokml':
233 self.result[0][child.tag] = True
235 assert child.tag == 'error', \
236 "Unknown XML tag {} on page: {}".format(child.tag, self.page)
239 class StatusResponse(GenericResponse):
240 """ Specialised class for status responses.
241 Can also parse text responses.
244 def _parse_text(self):