def _build_payload(self, params, layer, feature_count, version,
bbox, width, height, x, y,
cql_filters, cql_filter_string,
_buffer):
"""Build the request payload for GetFeatureInfo."""
DATUM_key = 'SRS'
X_key = 'X'
Y_key = 'Y'
if version == '1.3.0':
DATUM_key = 'CRS'
X_key = 'I'
Y_key = 'J'
payload = {
'REQUEST': 'GetFeatureInfo',
'EXCEPTIONS': 'application/vnd.ogc.se_xml',
'INFO_FORMAT': self._get_feature_mimetype(),
'SERVICE': 'WMS',
DATUM_key: 'EPSG:3857', # Always Google (web mercator)
'FEATURE_COUNT': feature_count,
# Set the layer we want
'LAYERS': layer,
'QUERY_LAYERS': layer,
'BBOX': bbox,
# Height and width in pixels
'HEIGHT': height,
'WIDTH': width,
# The clicked on pixel
X_key: x,
Y_key: y,
# Version from parameter
'VERSION': version,
# Non-standard WMS parameter to slightly increase search
# radius. Shouldn't hurt as most WMS server software ignore
# unknown parameters. see
# http://docs.geoserver.org/latest/en/user/services/wms/vendor.html
'BUFFER': _buffer,
}
# Add styles to request when defined
if 'styles' in params and params['styles']:
payload['STYLES'] = params['styles']
total_cql_filter = []
# cql filter string comes from Filter Page
if cql_filter_string:
total_cql_filter.append(cql_filter_string)
# cql filter defined in the wms source parameters
if 'cql_filter' in params and params['cql_filter']:
total_cql_filter.append(params['cql_filter'])
# CQL filters passed through from the frontend
if cql_filters is not None:
allowed_filters = self.featureline_set.filter(
visible=True, name__in=cql_filters.keys()
).values_list('name', flat=True)
for key in allowed_filters:
total_cql_filter.append('='.join([key, str(cql_filters[key])]))
if total_cql_filter:
payload['CQL_FILTER'] = ' AND '.join(total_cql_filter)
if self.timepositions:
# Get the user selected date/time selection.
date = get_view_state(tls.request)
formatting = '%Y-%m-%dT%H:%M:%SZ'
payload['TIME'] = '/'.join(
d.strftime(formatting)
for d in [date['dt_start'], date['dt_end']])
return payload
