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 def _parse_json(self):
67 m = re.fullmatch(r'([\w$][^(]*)\((.*)\)', self.page)
72 self.header['json_func'] = m.group(1)
73 self.result = json.JSONDecoder(object_pairs_hook=OrderedDict).decode(code)
74 if isinstance(self.result, OrderedDict):
75 if 'error' in self.result:
78 self.result = [self.result]
80 def _parse_geojson(self):
83 self.result = list(map(_geojson_result_to_json_result, self.result[0]['features']))
85 def _parse_geocodejson(self):
87 if self.result is not None:
88 self.result = [r['geocoding'] for r in self.result]
90 def assert_field(self, idx, field, value):
91 """ Check that result row `idx` has a field `field` with value `value`.
92 Float numbers are matched approximately. When the expected value
93 starts with a carat, regular expression matching is used.
95 assert field in self.result[idx], \
96 "Result row {} has no field '{}'.\nFull row: {}"\
97 .format(idx, field, json.dumps(self.result[idx], indent=4))
99 if isinstance(value, float):
100 assert Almost(value) == float(self.result[idx][field]), \
101 BadRowValueAssert(self, idx, field, value)
102 elif value.startswith("^"):
103 assert re.fullmatch(value, self.result[idx][field]), \
104 BadRowValueAssert(self, idx, field, value)
105 elif isinstance(self.result[idx][field], OrderedDict):
106 assert self.result[idx][field] == eval('{' + value + '}'), \
107 BadRowValueAssert(self, idx, field, value)
109 assert str(self.result[idx][field]) == str(value), \
110 BadRowValueAssert(self, idx, field, value)
112 def assert_address_field(self, idx, field, value):
113 """ Check that result rows`idx` has a field `field` with value `value`
114 in its address. If idx is None, then all results are checked.
117 todo = range(len(self.result))
122 assert 'address' in self.result[idx], \
123 "Result row {} has no field 'address'.\nFull row: {}"\
124 .format(idx, json.dumps(self.result[idx], indent=4))
126 address = self.result[idx]['address']
127 assert field in address, \
128 "Result row {} has no field '{}' in address.\nFull address: {}"\
129 .format(idx, field, json.dumps(address, indent=4))
131 assert address[field] == value, \
132 "\nBad value for row {} field '{}' in address. Expected: {}, got: {}.\nFull address: {}"""\
133 .format(idx, field, value, address[field], json.dumps(address, indent=4))
135 def match_row(self, row, context=None):
136 """ Match the result fields against the given behave table row.
138 if 'ID' in row.headings:
139 todo = [int(row['ID'])]
141 todo = range(len(self.result))
144 for name, value in zip(row.headings, row.cells):
148 assert 'osm_type' in self.result[i], \
149 "Result row {} has no field 'osm_type'.\nFull row: {}"\
150 .format(i, json.dumps(self.result[i], indent=4))
151 assert self.result[i]['osm_type'] in (OSM_TYPE[value[0]], value[0]), \
152 BadRowValueAssert(self, i, 'osm_type', value)
153 self.assert_field(i, 'osm_id', value[1:])
154 elif name == 'osm_type':
155 assert self.result[i]['osm_type'] in (OSM_TYPE[value[0]], value[0]), \
156 BadRowValueAssert(self, i, 'osm_type', value)
157 elif name == 'centroid':
159 lon, lat = value.split(' ')
160 elif context is not None:
161 lon, lat = context.osm.grid_node(int(value))
163 raise RuntimeError("Context needed when using grid coordinates")
164 self.assert_field(i, 'lat', float(lat))
165 self.assert_field(i, 'lon', float(lon))
167 self.assert_field(i, name, value)
169 def property_list(self, prop):
170 return [x[prop] for x in self.result]
173 class SearchResponse(GenericResponse):
174 """ Specialised class for search and lookup responses.
175 Transforms the xml response in a format similar to json.
178 def _parse_xml(self):
179 xml_tree = ET.fromstring(self.page)
181 self.header = dict(xml_tree.attrib)
183 for child in xml_tree:
184 assert child.tag == "place"
185 self.result.append(dict(child.attrib))
189 if sub.tag == 'extratags':
190 self.result[-1]['extratags'] = {}
192 self.result[-1]['extratags'][tag.attrib['key']] = tag.attrib['value']
193 elif sub.tag == 'namedetails':
194 self.result[-1]['namedetails'] = {}
196 self.result[-1]['namedetails'][tag.attrib['desc']] = tag.text
197 elif sub.tag == 'geokml':
198 self.result[-1][sub.tag] = True
200 address[sub.tag] = sub.text
203 self.result[-1]['address'] = address
206 class ReverseResponse(GenericResponse):
207 """ Specialised class for reverse responses.
208 Transforms the xml response in a format similar to json.
211 def _parse_xml(self):
212 xml_tree = ET.fromstring(self.page)
214 self.header = dict(xml_tree.attrib)
217 for child in xml_tree:
218 if child.tag == 'result':
219 assert not self.result, "More than one result in reverse result"
220 self.result.append(dict(child.attrib))
221 elif child.tag == 'addressparts':
224 address[sub.tag] = sub.text
225 self.result[0]['address'] = address
226 elif child.tag == 'extratags':
227 self.result[0]['extratags'] = {}
229 self.result[0]['extratags'][tag.attrib['key']] = tag.attrib['value']
230 elif child.tag == 'namedetails':
231 self.result[0]['namedetails'] = {}
233 self.result[0]['namedetails'][tag.attrib['desc']] = tag.text
234 elif child.tag == 'geokml':
235 self.result[0][child.tag] = True
237 assert child.tag == 'error', \
238 "Unknown XML tag {} on page: {}".format(child.tag, self.page)
241 class StatusResponse(GenericResponse):
242 """ Specialised class for status responses.
243 Can also parse text responses.
246 def _parse_text(self):