def validate_request(request):
"""
Validates full request with regards to validation schemas and HTTP headers.
:param request: POST or GET request from user
:type request: Flask request
:raises InvalidUsage: internal HTTP 500 error with more detailed description.
:returns: validated and normalized request arguments
:rtype: dict
"""
if request.method == 'GET':
v.allow_unknown = True
v.validate(dict(request.args), schema_get)
if request.method == 'POST':
if not 'application/json' in request.headers['Content-Type']:
raise api_exceptions.InvalidUsage(
500, 4001, "Content-Type header is not application/json")
v.validate(request.get_json(), schema_post)
if v.errors:
errors = []
for error in v.errors:
errors.append("Argument '{}': {}".format(error,
v.errors[error][0]))
raise api_exceptions.InvalidUsage(500, 4000, ", ".join(errors))
return v.document
def elevationpoint():
"""
Function called when user posts to/gets /elevation/point.
:raises InvalidUsage: internal HTTP 500 error with more detailed description.
:returns: elevation response
:rtype: Response class
"""
req_args = validator.validate_request(request)
log.debug(req_args)
if request.method == 'POST':
# Check incoming parameters
req_geometry = req_args['geometry']
format_in = req_args['format_in']
format_out = req_args['format_out']
dataset = req_args['dataset']
# Get the geometry
if format_in == 'geojson':
geom = convert.geojson_to_geometry(req_geometry)
elif format_in == 'point':
geom = convert.point_to_geometry(req_geometry)
else:
raise api_exceptions.InvalidUsage(
400, 4000, f"Invalid format_in value {format_in}")
else:
req_geometry = req_args['geometry']
format_out = req_args['format_out']
dataset = req_args['dataset']
try:
# Catch errors when parsing the input string
point_coords = [float(x) for x in req_geometry.split(',')]
except:
raise api_exceptions.InvalidUsage(
500, 4000,
'{} is not a comma separated list of long, lat'.format(
req_geometry))
geom = convert.point_to_geometry(point_coords)
# Build response with attribution etc.
results = ResponseBuilder().__dict__
geom_queried = querybuilder.point_elevation(geom, format_out, dataset)
if format_out == 'point':
geom_out = wkt.loads(geom_queried)
results['geometry'] = list(geom_out.coords[0])
elif format_out == 'geojson':
results['geometry'] = json.loads(geom_queried)
else:
raise api_exceptions.InvalidUsage(
400, 4000, f'Invalid format_out value "{format_out}"')
return jsonify(results)
def elevationline():
"""
Function called when user posts to /elevation/line.
:raises InvalidUsage: internal HTTP 500 error with more detailed description.
:returns: elevation response
:rtype: Response
"""
# Cerberus validates and returns a processed arg dict
req_args = validator.validate_request(request)
# Incoming parameters
geometry_str = req_args['geometry']
format_in = req_args['format_in']
format_out = req_args['format_out']
dataset = req_args['dataset']
# Get the geometry
if format_in == 'geojson':
geom = convert.geojson_to_geometry(geometry_str)
elif format_in in ['encodedpolyline', 'encodedpolyline5']:
geom = codec.decode(geometry_str, precision=5, is3d=False)
elif format_in == 'encodedpolyline6':
geom = codec.decode(geometry_str, precision=6, is3d=False)
elif format_in == 'polyline':
geom = convert.polyline_to_geometry(geometry_str)
else:
raise api_exceptions.InvalidUsage(
400, 4000, f'Invalid format_in value "{format_in}"')
if len(list(geom.coords)) > SETTINGS['maximum_nodes']:
raise api_exceptions.InvalidUsage(
status_code=400,
error_code=4003,
message='Maximum number of nodes exceeded.')
results = ResponseBuilder().__dict__
geom_queried = querybuilder.line_elevation(geom, format_out, dataset)
# decision tree for format_out
if format_out != 'geojson':
geom_out = wkt.loads(geom_queried)
coords = geom_out.coords
if format_out in ['encodedpolyline', 'encodedpolyline5']:
results['geometry'] = codec.encode(coords, precision=5, is3d=True)
elif format_out == 'encodedpolyline6':
results['geometry'] = codec.encode(coords, precision=6, is3d=True)
else:
results['geometry'] = list(coords)
elif format_out == 'geojson':
results['geometry'] = json.loads(geom_queried)
else:
raise api_exceptions.InvalidUsage(
400, 4000, f'Invalid format_out value "{format_out}"')
return jsonify(results)
