def _get_info_for_first_matching_node(self, xpath):
# type: (str) -> dict
with self._get_node_ids(xpath) as node_ids:
if node_ids:
return self._describe_node(node_ids[0])
raise ResourceNotFoundError("No matching nodes for xpath: %s" % xpath)
def execute(self, domain_name, method_name, params=None):
result_id = self._execute(domain_name, method_name, params)
result = self._wait_for_result(result_id)
if "error" in result:
code = result["error"]["code"]
message = result["error"]["message"]
if code == -32000:
raise ResourceNotFoundError(message)
if code == -32601:
raise MethodNotFoundError(message)
if code == -32602:
raise InvalidParametersError(message)
raise UnknownError("DevTools Protocol error code %s: %s" %
(code, message))
return result
def _get_iframe_backend_node_id(self, xpath):
# type: (str) -> int
if xpath in self._node_map:
return self._node_map[xpath]
node_info = self._get_info_for_first_matching_node(xpath)
try:
backend_node_id = node_info["node"]["contentDocument"][
"backendNodeId"]
except KeyError:
raise ResourceNotFoundError(
"The node found by xpath '%s' is not an iframe" % xpath)
self._node_map[xpath] = backend_node_id
return backend_node_id