diff options
Diffstat (limited to 'python/vyos/config.py')
| -rw-r--r-- | python/vyos/config.py | 172 |
1 files changed, 38 insertions, 134 deletions
diff --git a/python/vyos/config.py b/python/vyos/config.py index 780b48a7b..884d6d947 100644 --- a/python/vyos/config.py +++ b/python/vyos/config.py @@ -63,22 +63,13 @@ In operational mode, all functions return values from the running config. """ -import os import re import json -import subprocess +from copy import deepcopy import vyos.util import vyos.configtree - -class VyOSError(Exception): - """ - Raised on config access errors, most commonly if the type of a config tree node - in the system does not match the type of operation. - - """ - pass - +from vyos.configsource import ConfigSource, ConfigSourceSession class Config(object): """ @@ -88,49 +79,18 @@ class Config(object): the only state it keeps is relative *config path* for convenient access to config subtrees. """ - def __init__(self, session_env=None): - self._cli_shell_api = "/bin/cli-shell-api" - self._level = [] - if session_env: - self.__session_env = session_env - else: - self.__session_env = None - - # Running config can be obtained either from op or conf mode, it always succeeds - # once the config system is initialized during boot; - # before initialization, set to empty string - if os.path.isfile('/tmp/vyos-config-status'): - try: - running_config_text = self._run([self._cli_shell_api, '--show-active-only', '--show-show-defaults', '--show-ignore-edit', 'showConfig']) - except VyOSError: - running_config_text = '' - else: - running_config_text = '' - - # Session config ("active") only exists in conf mode. - # In op mode, we'll just use the same running config for both active and session configs. - if self.in_session(): - try: - session_config_text = self._run([self._cli_shell_api, '--show-working-only', '--show-show-defaults', '--show-ignore-edit', 'showConfig']) - except VyOSError: - session_config_text = '' - else: - session_config_text = running_config_text - - if running_config_text: - self._running_config = vyos.configtree.ConfigTree(running_config_text) - else: - self._running_config = None - - if session_config_text: - self._session_config = vyos.configtree.ConfigTree(session_config_text) + def __init__(self, session_env=None, config_source=None): + if config_source is None: + self._config_source = ConfigSourceSession(session_env) else: - self._session_config = None + if not isinstance(config_source, ConfigSource): + raise TypeError("config_source not of type ConfigSource") + self._config_source = config_source - def _make_command(self, op, path): - args = path.split() - cmd = [self._cli_shell_api, op] + args - return cmd + self._level = [] + self._dict_cache = {} + (self._running_config, + self._session_config) = self._config_source.get_configtree_tuple() def _make_path(self, path): # Backwards-compatibility stuff: original implementation used string paths @@ -146,19 +106,6 @@ class Config(object): raise TypeError("Path must be a whitespace-separated string or a list") return (self._level + path) - def _run(self, cmd): - if self.__session_env: - p = subprocess.Popen(cmd, stdout=subprocess.PIPE, env=self.__session_env) - else: - p = subprocess.Popen(cmd, stdout=subprocess.PIPE) - out = p.stdout.read() - p.wait() - p.communicate() - if p.returncode != 0: - raise VyOSError() - else: - return out.decode('ascii') - def set_level(self, path): """ Set the *edit level*, that is, a relative config tree path. @@ -226,22 +173,14 @@ class Config(object): Returns: True if the config session has uncommited changes, False otherwise. """ - try: - self._run(self._make_command('sessionChanged', '')) - return True - except VyOSError: - return False + return self._config_source.session_changed() def in_session(self): """ Returns: True if called from a configuration session, False otherwise. """ - try: - self._run(self._make_command('inSession', '')) - return True - except VyOSError: - return False + return self._config_source.in_session() def show_config(self, path=[], default=None, effective=False): """ @@ -252,40 +191,25 @@ class Config(object): Returns: str: working configuration """ + return self._config_source.show_config(path, default, effective) - # show_config should be independent of CLI edit level. - # Set the CLI edit environment to the top level, and - # restore original on exit. - save_env = self.__session_env + def get_cached_dict(self, effective=False): + cached = self._dict_cache.get(effective, {}) + if cached: + config_dict = cached + else: + config_dict = {} - env_str = self._run(self._make_command('getEditResetEnv', '')) - env_list = re.findall(r'([A-Z_]+)=\'([^;\s]+)\'', env_str) - root_env = os.environ - for k, v in env_list: - root_env[k] = v + if effective: + if self._running_config: + config_dict = json.loads((self._running_config).to_json()) + else: + if self._session_config: + config_dict = json.loads((self._session_config).to_json()) - self.__session_env = root_env + self._dict_cache[effective] = config_dict - # FIXUP: by default, showConfig will give you a diff - # if there are uncommitted changes. - # The config parser obviously cannot work with diffs, - # so we need to supress diff production using appropriate - # options for getting either running (active) - # or proposed (working) config. - if effective: - path = ['--show-active-only'] + path - else: - path = ['--show-working-only'] + path - - if isinstance(path, list): - path = " ".join(path) - try: - out = self._run(self._make_command('showConfig', path)) - self.__session_env = save_env - return out - except VyOSError: - self.__session_env = save_env - return(default) + return config_dict def get_config_dict(self, path=[], effective=False, key_mangling=None, get_first_key=False): """ @@ -297,14 +221,7 @@ class Config(object): Returns: a dict representation of the config under path """ - config_dict = {} - - if effective: - if self._running_config: - config_dict = json.loads((self._running_config).to_json()) - else: - if self._session_config: - config_dict = json.loads((self._session_config).to_json()) + config_dict = self.get_cached_dict(effective) config_dict = vyos.util.get_sub_dict(config_dict, self._make_path(path), get_first_key) @@ -316,6 +233,8 @@ class Config(object): raise ValueError("key_mangling must be a tuple of two strings") else: config_dict = vyos.util.mangle_dict_keys(config_dict, key_mangling[0], key_mangling[1]) + else: + config_dict = deepcopy(config_dict) return config_dict @@ -330,12 +249,8 @@ class Config(object): Note: It also returns False if node doesn't exist. """ - try: - path = " ".join(self._level) + " " + path - self._run(self._make_command('isMulti', path)) - return True - except VyOSError: - return False + self._config_source.set_level(self.get_level) + return self._config_source.is_multi(path) def is_tag(self, path): """ @@ -348,12 +263,8 @@ class Config(object): Note: It also returns False if node doesn't exist. """ - try: - path = " ".join(self._level) + " " + path - self._run(self._make_command('isTag', path)) - return True - except VyOSError: - return False + self._config_source.set_level(self.get_level) + return self._config_source.is_tag(path) def is_leaf(self, path): """ @@ -366,12 +277,8 @@ class Config(object): Note: It also returns False if node doesn't exist. """ - try: - path = " ".join(self._level) + " " + path - self._run(self._make_command('isLeaf', path)) - return True - except VyOSError: - return False + self._config_source.set_level(self.get_level) + return self._config_source.is_leaf(path) def return_value(self, path, default=None): """ @@ -532,9 +439,6 @@ class Config(object): Returns: str list: child node names - - Raises: - VyOSError: if the node is not a tag node """ if self._running_config: try: |