def get_installed(self):
"""Sorted list of (username, napp_name) of installed napps."""
uri = self._kytos_api + self._NAPPS_INSTALLED
try:
response = urllib.request.urlopen(uri)
if response.getcode() != 200:
msg = "Error calling Kytos to check installed NApps."
raise KytosException(msg)
content = json.loads(response.read())
return sorted((c[0], c[1]) for c in content['napps'])
except urllib.error.URLError as exception:
LOG.error("Error checking installed NApps. Is Kytos running?")
raise KytosException(exception)
def reload_napps(self, napps=None):
"""Reload a specific NApp or all Napps.
Args:
napp (list): NApp list to be reload.
Raises:
requests.HTTPError: When there's a server error.
"""
if napps is None:
napps = []
api = self._config.get('kytos', 'api')
endpoint = os.path.join(api, 'api', 'kytos', 'core', 'reload',
'all')
response = self.make_request(endpoint)
for napp in napps:
api = self._config.get('kytos', 'api')
endpoint = os.path.join(api, 'api', 'kytos', 'core', 'reload',
napp[0], napp[1])
response = self.make_request(endpoint)
if response.status_code != 200:
raise KytosException('Error reloading the napp: Module not founded'
' or could not be imported')
return response.content
def install_napp(cls, mgr):
"""Install a NApp.
Raises:
KytosException: If a NApp hasn't been found.
"""
try:
LOG.info(' Searching local NApp...')
mgr.install_local()
LOG.info(' Found and installed.')
except FileNotFoundError:
LOG.info(' Not found. Downloading from NApps Server...')
try:
mgr.install_remote()
LOG.info(' Downloaded and installed.')
return
except HTTPError as exception:
if exception.code == 404:
LOG.error(' NApp not found.')
else:
LOG.error(' NApps Server error: %s', exception)
except URLError as exception:
LOG.error(' NApps Server error: %s', str(exception.reason))
raise KytosException("NApp not found.")
def parse_napp(napp_id):
"""Convert a napp_id in tuple with username, napp name and version.
Args:
napp_id: String with the form 'username/napp[:version]' (version is
optional). If no version is found, it will be None.
Returns:
tuple: A tuple with (username, napp, version)
Raises:
KytosException: If a NApp has not the form _username/name_.
"""
# `napp_id` regex, composed by two mandatory parts (username, napp_name)
# and one optional (version).
# username and napp_name need to start with a letter, are composed of
# letters, numbers and uderscores and must have at least three characters.
# They are separated by a colon.
# version is optional and can take any format. Is is separated by a hyphen,
# if a version is defined.
regex = r'([a-zA-Z][a-zA-Z0-9_]{2,})/([a-zA-Z][a-zA-Z0-9_]{2,}):?(.+)?'
compiled_regex = re.compile(regex)
matched = compiled_regex.fullmatch(napp_id)
if not matched:
msg = '"{}" NApp has not the form username/napp_name[:version].'
raise KytosException(msg.format(napp_id))
return matched.groups()
def get_napp(self, username, name):
"""Return napp metadata or None if not found."""
endpoint = os.path.join(self._config.get('napps', 'api'), 'napps',
username, name, '')
res = self.make_request(endpoint)
if res.status_code == 404: # We need to know if NApp is not found
return None
elif res.status_code != 200:
raise KytosException('Error getting %s/%s from server: (%d) - %s',
username, name, res.status_code, res.reason)
return json.loads(res.content)
def install_napp(cls, mgr):
"""Install a NApp.
Raises:
KytosException: If a NApp hasn't been found.
"""
LOG.info(' Downloading from NApps Server...')
try:
mgr.remote_install()
LOG.info(' Downloaded and installed.')
return
except HTTPError as exception:
if exception.code == 404:
LOG.error(' NApp not found.')
LOG.info(" If you are trying to install a local NApp, "
"use the command 'python setup.py develop' "
"inside the 'user/napp' directory.")
elif exception.code == 400:
LOG.error(' NApps Server error: %s', exception)
except URLError as exception:
LOG.error(' NApps Server error: %s', str(exception.reason))
raise KytosException("NApp not found.")