1 # SPDX-License-Identifier: GPL-2.0-only
3 # This file is part of Nominatim. (https://nominatim.org)
5 # Copyright (C) 2023 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.
12 import xml.etree.ElementTree as ET
14 from check_functions import Almost, OsmType, Field, check_for_attributes
17 class GenericResponse:
18 """ Common base class for all API responses.
20 def __init__(self, page, fmt, errorcode=200):
27 self.errorcode = errorcode
31 if errorcode == 200 and fmt != 'debug':
32 getattr(self, '_parse_' + fmt)()
34 def _parse_json(self):
35 m = re.fullmatch(r'([\w$][^(]*)\((.*)\)', self.page)
40 self.header['json_func'] = m.group(1)
41 self.result = json.JSONDecoder().decode(code)
42 if isinstance(self.result, dict):
43 if 'error' in self.result:
46 self.result = [self.result]
49 def _parse_geojson(self):
52 geojson = self.result[0]
53 # check for valid geojson
54 check_for_attributes(geojson, 'type,features')
55 assert geojson['type'] == 'FeatureCollection'
56 assert isinstance(geojson['features'], list)
59 for result in geojson['features']:
60 check_for_attributes(result, 'type,properties,geometry')
61 assert result['type'] == 'Feature'
62 new = result['properties']
63 check_for_attributes(new, 'geojson', 'absent')
64 new['geojson'] = result['geometry']
66 check_for_attributes(new, 'boundingbox', 'absent')
67 # bbox is minlon, minlat, maxlon, maxlat
68 # boundingbox is minlat, maxlat, minlon, maxlon
69 new['boundingbox'] = [result['bbox'][1],
73 for k, v in geojson.items():
74 if k not in ('type', 'features'):
75 check_for_attributes(new, '__' + k, 'absent')
77 self.result.append(new)
80 def _parse_geocodejson(self):
84 assert set(r.keys()) == {'geocoding', 'geojson', '__geocoding'}, \
85 f"Unexpected keys in result: {r.keys()}"
86 check_for_attributes(r['geocoding'], 'geojson', 'absent')
87 r |= r.pop('geocoding')
90 def assert_address_field(self, idx, field, value):
91 """ Check that result rows`idx` has a field `field` with value `value`
92 in its address. If idx is None, then all results are checked.
95 todo = range(len(self.result))
100 self.check_row(idx, 'address' in self.result[idx], "No field 'address'")
102 address = self.result[idx]['address']
103 self.check_row_field(idx, field, value, base=address)
106 def match_row(self, row, context=None, field=None):
107 """ Match the result fields against the given behave table row.
109 if 'ID' in row.headings:
110 todo = [int(row['ID'])]
112 todo = range(len(self.result))
115 subdict = self.result[i]
116 if field is not None:
117 for key in field.split('.'):
118 self.check_row(i, key in subdict, f"Missing subfield {key}")
119 subdict = subdict[key]
120 self.check_row(i, isinstance(subdict, dict),
121 f"Subfield {key} not a dict")
123 for name, value in zip(row.headings, row.cells):
127 self.check_row_field(i, 'osm_type', OsmType(value[0]), base=subdict)
128 self.check_row_field(i, 'osm_id', Field(value[1:]), base=subdict)
129 elif name == 'centroid':
131 lon, lat = value.split(' ')
132 elif context is not None:
133 lon, lat = context.osm.grid_node(int(value))
135 raise RuntimeError("Context needed when using grid coordinates")
136 self.check_row_field(i, 'lat', Field(float(lat)), base=subdict)
137 self.check_row_field(i, 'lon', Field(float(lon)), base=subdict)
139 self.check_row_field(i, name, Field(value), base=subdict)
142 def check_row(self, idx, check, msg):
143 """ Assert for the condition 'check' and print 'msg' on fail together
144 with the contents of the failing result.
147 def __init__(self, row):
151 return f"{msg}. Full row {idx}:\n" \
152 + json.dumps(self.row, indent=4, ensure_ascii=False)
154 assert check, _RowError(self.result[idx])
157 def check_row_field(self, idx, field, expected, base=None):
158 """ Check field 'field' of result 'idx' for the expected value
159 and print a meaningful error if the condition fails.
160 When 'base' is set to a dictionary, then the field is checked
161 in that base. The error message will still report the contents
165 base = self.result[idx]
167 self.check_row(idx, field in base, f"No field '{field}'")
170 self.check_row(idx, expected == value,
171 f"\nBad value for field '{field}'. Expected: {expected}, got: {value}")
175 class SearchResponse(GenericResponse):
176 """ Specialised class for search and lookup responses.
177 Transforms the xml response in a format similar to json.
180 def _parse_xml(self):
181 xml_tree = ET.fromstring(self.page)
183 self.header = dict(xml_tree.attrib)
185 for child in xml_tree:
186 assert child.tag == "place"
187 self.result.append(dict(child.attrib))
191 if sub.tag == 'extratags':
192 self.result[-1]['extratags'] = {}
194 self.result[-1]['extratags'][tag.attrib['key']] = tag.attrib['value']
195 elif sub.tag == 'namedetails':
196 self.result[-1]['namedetails'] = {}
198 self.result[-1]['namedetails'][tag.attrib['desc']] = tag.text
199 elif sub.tag == 'geokml':
200 self.result[-1][sub.tag] = True
202 address[sub.tag] = sub.text
205 self.result[-1]['address'] = address
208 class ReverseResponse(GenericResponse):
209 """ Specialised class for reverse responses.
210 Transforms the xml response in a format similar to json.
213 def _parse_xml(self):
214 xml_tree = ET.fromstring(self.page)
216 self.header = dict(xml_tree.attrib)
219 for child in xml_tree:
220 if child.tag == 'result':
221 assert not self.result, "More than one result in reverse result"
222 self.result.append(dict(child.attrib))
223 check_for_attributes(self.result[0], 'display_name', 'absent')
224 self.result[0]['display_name'] = child.text
225 elif child.tag == 'addressparts':
226 assert 'address' not in self.result[0], "More than one address in result"
229 assert len(sub) == 0, f"Address element '{sub.tag}' has subelements"
230 address[sub.tag] = sub.text
231 self.result[0]['address'] = address
232 elif child.tag == 'extratags':
233 assert 'extratags' not in self.result[0], "More than one extratags in result"
234 self.result[0]['extratags'] = {}
236 assert len(tag) == 0, f"Extratags element '{tag.attrib['key']}' has subelements"
237 self.result[0]['extratags'][tag.attrib['key']] = tag.attrib['value']
238 elif child.tag == 'namedetails':
239 assert 'namedetails' not in self.result[0], "More than one namedetails in result"
240 self.result[0]['namedetails'] = {}
242 assert len(tag) == 0, f"Namedetails element '{tag.attrib['desc']}' has subelements"
243 self.result[0]['namedetails'][tag.attrib['desc']] = tag.text
244 elif child.tag == 'geokml':
245 assert 'geokml' not in self.result[0], "More than one geokml in result"
246 self.result[0]['geokml'] = ET.tostring(child, encoding='unicode')
248 assert child.tag == 'error', \
249 f"Unknown XML tag {child.tag} on page: {self.page}"
252 class StatusResponse(GenericResponse):
253 """ Specialised class for status responses.
254 Can also parse text responses.
257 def _parse_text(self):