blob: 79bcbbaa728cf9f325bafca32f1ecaa073515a63 [file] [log] [blame]
# Copyright 2014 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import json
import logging
import time
from autotest_lib.client.common_lib import error
from autotest_lib.client.common_lib import utils
URL_PING = 'ping'
URL_INFO = 'info'
URL_AUTH = 'v3/auth'
URL_PAIRING_CONFIRM = 'v3/pairing/confirm'
URL_PAIRING_START = 'v3/pairing/start'
URL_SETUP_START = 'v3/setup/start'
URL_SETUP_STATUS = 'v3/setup/status'
class PrivetHelper(object):
"""Delegate class containing logic useful with privetd."""
def __init__(self, host=None, hostname='localhost',
"""Construct a PrivetdHelper
@param host: host object where we should run the HTTP requests from.
@param hostname: string hostname of host to issue HTTP requests against.
@param http_port: int HTTP port to use when making HTTP requests.
@param https_port: int HTTPS port to use when making HTTPs requests.
self._host = None
self._run =
if host is not None:
self._host = host
self._run =
self._hostname = hostname
self._http_port = http_port
self._https_port = https_port
def _build_privet_url(self, path_fragment, use_https=True):
"""Builds a request URL for privet.
@param path_fragment: URL path fragment to be appended to /privet/ URL.
@param use_https: set to False to use 'http' protocol instead of https.
@return The full URL to be used for request.
protocol = 'http'
port = self._http_port
if use_https:
protocol = 'https'
port = self._https_port
url = '%s://%s:%s/privet/%s' % (protocol, self._hostname, port,
return url
def _http_request(self, url, request_data=None, retry_count=0,
retry_delay=0.3, headers={},
"""Sends a GET/POST request to a web server at the given |url|.
If the request fails due to error 111:Connection refused, try it again
after |retry_delay| seconds and repeat this to a max |retry_count|.
This is needed to make sure peerd has a chance to start up and start
responding to HTTP requests.
@param url: URL path to send the request to.
@param request_data: json data to send in POST request.
If None, a GET request is sent with no data.
@param retry_count: max request retry count.
@param retry_delay: retry_delay (in seconds) between retries.
@param headers: optional dictionary of http request headers
@param timeout_seconds: int number of seconds for curl to wait
to complete the request.
@param tolerate_failure: True iff we should allow curl failures.
@return The string content of the page requested at url.
logging.debug('Requesting %s', url)
args = []
if request_data is not None:
headers['Content-Type'] = 'application/json; charset=utf8'
for header in headers.iteritems():
args.append(': '.join(header))
# TODO(wiley do cert checking
args.append('%d' % timeout_seconds)
# Write the HTTP code to stdout
output_file = '/tmp/privetd_http_output'
while retry_count >= 0:
result = self._run('curl %s' % url, args=args,
retry_count -= 1
raw_response = ''
success = result.exit_status == 0
http_code = result.stdout or 'timeout'
if success:
raw_response = self._run('cat %s' % output_file).stdout
logging.debug('Got raw response: %s', raw_response)
if success and http_code == '200':
return raw_response
if retry_count < 0:
if tolerate_failure:
return None
raise error.TestFail('Failed requesting %s (code=%s)' %
(url, http_code))
logging.warn('Failed to connect to host. Retrying...')
def send_privet_request(self, path_fragment, request_data=None,
auth_token='Privet anonymous',
"""Sends a privet request over HTTPS.
@param path_fragment: URL path fragment to be appended to /privet/ URL.
@param request_data: json data to send in POST request.
If None, a GET request is sent with no data.
@param auth_token: authorization token to be added as 'Authorization'
http header using 'Privet' as the auth realm.
@param tolerate_failure: True iff we should allow curl failures.
if isinstance(request_data, dict):
request_data = json.dumps(request_data)
headers = {'Authorization': auth_token}
url = self._build_privet_url(path_fragment, use_https=True)
data = self._http_request(url, request_data=request_data,
if data is None and tolerate_failure:
return None
json_data = json.loads(data)
data = json.dumps(json_data) # Drop newlines, pretty format.
finally:'Received /privet/%s response: %s',
path_fragment, data)
return json_data
def ping_server(self, use_https=False):
"""Ping the privetd webserver.
Reuses port numbers from the last restart request. The server
must have been restarted with enable_ping=True for this to work.
@param use_https: set to True to use 'https' protocol instead of 'http'.
url = self._build_privet_url(URL_PING, use_https=use_https);
content = self._http_request(url, retry_delay=5, retry_count=5)
if content != 'Hello, world!':
raise error.TestFail('Unexpected response from web server: %s.' %
def privet_auth(self):
"""Go through pairing and insecure auth.
@return resulting auth token.
data = {'pairing': 'pinCode', 'crypto': 'none'}
pairing = self.send_privet_request(URL_PAIRING_START, request_data=data)
data = {'sessionId': pairing['sessionId'],
'clientCommitment': pairing['deviceCommitment']
self.send_privet_request(URL_PAIRING_CONFIRM, request_data=data)
data = {'authCode': pairing['deviceCommitment'],
'mode': 'pairing',
'requestedScope': 'owner'
auth = self.send_privet_request(URL_AUTH, request_data=data)
auth_token = '%s %s' % (auth['tokenType'], auth['accessToken'])
return auth_token
def setup_add_wifi_credentials(self, ssid, passphrase, data={}):
"""Add WiFi credentials to the data provided to setup_start().
@param ssid: string ssid of network to connect to.
@param passphrase: string passphrase for network.
@param data: optional dict of information to append to.
data['wifi'] = {'ssid': ssid, 'passphrase': passphrase}
return data
def setup_start(self, data, auth_token):
"""Provide privetd with credentials for various services.
@param data: dict of information to give to privetd. Should be
formed by one or more calls to setup_add_*() above.
@param auth_token: string auth token returned from privet_auth()
# We don't return the response here, because in general, we may not
# get one. In many cases, we'll tear down the AP so quickly that
# the webserver won't have time to respond.
self.send_privet_request(URL_SETUP_START, request_data=data,
auth_token=auth_token, tolerate_failure=True)
def wifi_setup_was_successful(self, ssid, auth_token):
"""Detect whether privetd thinks bootstrapping has succeeded.
@param ssid: string network we expect to connect to.
@param auth_token: string auth token returned from prviet_auth()
@return True iff setup/status reports success in connecting to
the given network.
response = self.send_privet_request(URL_SETUP_STATUS,
return (response['wifi']['status'] == 'success' and
response['wifi']['ssid'] == ssid)