def get_train_id(request):
"""
Get train ID from requst query string and unquote content.
Args:
request (FlaskRequest): Http request instance.
Returns:
str, unquoted train ID.
"""
train_id = request.args.get('train_id')
if train_id is not None:
try:
train_id = unquote(train_id, errors='strict')
except UnicodeDecodeError:
raise exceptions.ParamValueError('Unquote error with strict mode')
return train_id
def unquote_args(request, arg_name):
"""
Get args from requst query string and unquote content.
Args:
request (FlaskRequest): Http request instance.
arg_name (str): The name of arg.
Returns:
str, unquoted arg.
"""
arg_value = request.args.get(arg_name, "")
if arg_value is not None:
try:
arg_value = unquote(arg_value, errors='strict')
except UnicodeDecodeError:
raise exceptions.ParamValueError('Unquote error with strict mode')
return arg_value
def str_to_bool(param, param_name):
"""
Check param and transform it to bool.
Args:
param (str): 'true' or 'false' is valid.
param_name (str): Param name.
Returns:
bool, if param is 'true', case insensitive.
Raises:
ParamValueError: If the value of param is not 'false' and 'true'.
"""
if not isinstance(param, str):
raise exceptions.ParamTypeError(param_name, 'str')
if param.lower() not in ['false', 'true']:
raise exceptions.ParamValueError("The value of %s must be 'false' or 'true'." % param_name)
param = (param.lower() == 'true')
return param