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# Licensed to the Software Freedom Conservancy (SFC) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The SFC licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
import warnings
from selenium.webdriver.remote.webdriver import WebDriver as RemoteWebDriver
from .remote_connection import ChromeRemoteConnection
from .service import Service
from .options import Options
class WebDriver(RemoteWebDriver):
"""
Controls the ChromeDriver and allows you to drive the browser.
You will need to download the ChromeDriver executable from
http://chromedriver.storage.googleapis.com/index.html
"""
def __init__(self, executable_path="chromedriver", port=0,
options=None, service_args=None,
desired_capabilities=None, service_log_path=None,
chrome_options=None, keep_alive=True):
"""
Creates a new instance of the chrome driver.
Starts the service and then creates new instance of chrome driver.
:Args:
- executable_path - path to the executable. If the default is used it assumes the executable is in the $PATH
- port - port you would like the service to run, if left as 0, a free port will be found.
- options - this takes an instance of ChromeOptions
- service_args - List of args to pass to the driver service
- desired_capabilities - Dictionary object with non-browser specific
capabilities only, such as "proxy" or "loggingPref".
- service_log_path - Where to log information from the driver.
- chrome_options - Deprecated argument for options
- keep_alive - Whether to configure ChromeRemoteConnection to use HTTP keep-alive.
"""
if chrome_options:
warnings.warn('use options instead of chrome_options',
DeprecationWarning, stacklevel=2)
options = chrome_options
if options is None:
# desired_capabilities stays as passed in
if desired_capabilities is None:
desired_capabilities = self.create_options().to_capabilities()
else:
if desired_capabilities is None:
desired_capabilities = options.to_capabilities()
else:
desired_capabilities.update(options.to_capabilities())
self.service = Service(
executable_path,
port=port,
service_args=service_args,
log_path=service_log_path)
self.service.start()
try:
RemoteWebDriver.__init__(
self,
command_executor=ChromeRemoteConnection(
remote_server_addr=self.service.service_url,
keep_alive=keep_alive),
desired_capabilities=desired_capabilities)
except Exception:
self.quit()
raise
self._is_remote = False
def launch_app(self, id):
"""Launches Chrome app specified by id."""
return self.execute("launchApp", {'id': id})
def get_network_conditions(self):
"""
Gets Chrome network emulation settings.
:Returns:
A dict. For example:
{'latency': 4, 'download_throughput': 2, 'upload_throughput': 2,
'offline': False}
"""
return self.execute("getNetworkConditions")['value']
def set_network_conditions(self, **network_conditions):
"""
Sets Chrome network emulation settings.
:Args:
- network_conditions: A dict with conditions specification.
:Usage:
driver.set_network_conditions(
offline=False,
latency=5, # additional latency (ms)
download_throughput=500 * 1024, # maximal throughput
upload_throughput=500 * 1024) # maximal throughput
Note: 'throughput' can be used to set both (for download and upload).
"""
self.execute("setNetworkConditions", {
'network_conditions': network_conditions
})
def execute_cdp_cmd(self, cmd, cmd_args):
"""
Execute Chrome Devtools Protocol command and get returned result
The command and command args should follow chrome devtools protocol domains/commands, refer to link
https://chromedevtools.github.io/devtools-protocol/
:Args:
- cmd: A str, command name
- cmd_args: A dict, command args. empty dict {} if there is no command args
:Usage:
driver.execute_cdp_cmd('Network.getResponseBody', {'requestId': requestId})
:Returns:
A dict, empty dict {} if there is no result to return.
For example to getResponseBody:
{'base64Encoded': False, 'body': 'response body string'}
"""
return self.execute("executeCdpCommand", {'cmd': cmd, 'params': cmd_args})['value']
def quit(self):
"""
Closes the browser and shuts down the ChromeDriver executable
that is started when starting the ChromeDriver
"""
try:
RemoteWebDriver.quit(self)
except Exception:
# We don't care about the message because something probably has gone wrong
pass
finally:
self.service.stop()
def create_options(self):
return Options()
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