199 lines
9.9 KiB
Python
199 lines
9.9 KiB
Python
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import os
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import time
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class Singleton(object):
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def __new__(cls, *args, **kw):
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if not hasattr(cls, '_instance'):
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orig = super(Singleton, cls)
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cls._instance = orig.__new__(cls, *args, **kw)
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return cls._instance
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def singleton(cls, *args, **kw):
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instances = {}
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def _singleton(*args, **kw):
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if cls not in instances:
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instances[cls] = cls(*args, **kw)
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return instances[cls]
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return _singleton
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@singleton
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class Registry(object):
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registryPath = None
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required_keys = ["mnt-by", "source"]
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single_keys = ["source", "descr", "single", "org", "policy", "status", "cidr", "max-length", "netname", "nic-hdl", "status", "abuse-mailbox", "as-block", "as-name", "as-set", "aut-num", "compression", "country", "dir-name", "domain", "fingerpr", "inet6num", "inetnum",
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"key-cert", "method", "mntner", "organisation", "org-name", "owners", "owner", "person", "port", "ref", "registry", "role", "route", "route6", "route-set", "schema", "tinc-address", "tinc-file", "tinc-host", "tinc-keyset", "tinc-key"]
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multi_keys = ["mnt-by", "remarks", "tech-c", "admin-c", "org", "nserver", "ds-rdata", "member-of", "abuse-mailbox", "abuse-c", "address", "country", "e-mail", "fax-no", "mbrs-by-ref", "members", "mnt-lower", "origin", "phone", "pingable", "www", "zone-c", "auth",
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"certif", "contact", "default", "export", "geo-loc", "geoloc", "import", "key", "language", "member", "mnt-ref", "mp-default", "mp-export", "mp-group", "mp-import", "mp-members", "network-owner", "nick", "owner", "pgp-fingerprint", "primary-key", "subnet", "url"]
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required_per_type = {"as-block": ["as-block", "policy"], "as-set": ["as-set"], "aut-num": ["aut-num", "as-name"], "dns": ["domain", "nserver"], "inet6num": ["inet6num", "cidr"], "inetnum": ["inetnum", "cidr"], "key-cert": ["key-cert", "method", "owner", "fingerpr", "certif"], "mntner": ["mntner"],
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"organisation": ["organisation", "org-name"], "person": ["person", "nic-hdl"], "registry": ["registry", "url"], "role": ["role", "nic-hdl"], "route": ["route", "origin"], "route6": ["route6", "origin"], "route-set": ["route-set"], "schema": ["schema", "ref", "key"], "tinc-key": ["tinc-key", "tinc-host", "tinc-file"], "tinc-keyset": ["tinc-keyset", "member"]}
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def __init__(self, registryPath: str = None):
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if registryPath != None:
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self.registryPath = registryPath
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self.index = {}
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# cache: to not need to make expensive actions, expired: if something changed in the index, will rerun expensive actions
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self._cache = {"mntner-objects": {}, "expired": True}
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def _parse_from_content(self, objectType: str, objectFile: str):
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previous_key = None
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for line in self.index[objectType][objectFile]["_content"]:
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# start = " "*20 or just"+" -> continuation of previous key/value
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if line.startswith(" ") or line == "+\n":
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if previous_key:
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if previous_key in self.multi_keys:
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self.index[objectType][objectFile][previous_key][-1] += "\n" + \
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line[20:].rstrip()
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else:
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self.index[objectType][objectFile][previous_key] += "\n" + \
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line[20:].rstrip()
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else:
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print(
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f"ERROR: empty/invalid first line(s) in {objectType}/{objectFile}")
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else:
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# if line.startswith("source"):
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# print(f"INFO: source found in: {dir}/{objectPath}")
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_key = line.split(":")[0]
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if _key == "source":
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pass
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if _key in self.multi_keys:
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if not _key in self.index[objectType][objectFile]:
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self.index[objectType][objectFile][_key] = [
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line[20:].rstrip()]
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else:
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self.index[objectType][objectFile][_key].append(
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line[20:].rstrip())
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elif _key in self.single_keys:
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if not _key in self.index[objectType][objectFile]:
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self.index[objectType][objectFile][_key] = line[20:].rstrip(
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)
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else:
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print(
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f"WARN: {objectType}/{objectFile} has multiple {_key}, which is has to be 'single'")
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else:
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print(
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f"WARN: invalid key {_key} found in {objectType}/{objectFile}")
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previous_key = _key
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for req_key in self.required_keys + self.required_per_type[objectType]:
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if not req_key in self.index[objectType][objectFile]:
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print(
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f"WARN: required key {req_key} not found in {objectType}/{objectFile}")
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def _build_index(self, object: tuple = None):
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# fail when registryPath isn't initialized yet
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assert self.registryPath != None, f"registryPath not yet initialized"
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# load everything
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if not object:
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print("INFO: building full registry index")
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start_time = time.time()
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# TODO: get list of types from data/schema/* or data/*
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for dir in ["as-block", "as-set", "aut-num", "dns", "inet6num", "inetnum", "key-cert", "mntner", "organisation", "person", "registry", "role", "route", "route6", "route-set", "schema", "tinc-key", "tinc-keyset"]:
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self.index[dir] = {}
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try:
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for objectFile in os.listdir(f"{self.registryPath}/data/{dir}/"):
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self.index[dir][objectFile] = {}
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with open(f"{self.registryPath}/data/{dir}/{objectFile}") as f:
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self.index[dir][objectFile]["_content"] = f.readlines()
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self._parse_from_content(dir, objectFile)
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except FileNotFoundError:
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print(f"WARN: directory for {dir} doesn't exist")
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self._cache["expired"] = True
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print(
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f"INFO: building registry index done, took {time.time() - start_time}")
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# (re)load one specific object
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else:
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...
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self._cache["expired"] = True
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def get_object(self, objectType: str, objectFile: str) -> tuple[bool, dict or str]:
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# check if index is not yet initialized
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if self.index == {}:
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print("INFO: requested get_object, but index not yet created")
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self._build_index()
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if objectType in self.index:
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if objectFile in self.index[objectType]:
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return True, self.index[objectType][objectFile]
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return False, "not found"
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def get_all_by_mntner(self, mntner: str) -> tuple[bool, dict or str]:
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def _load_by_mntner(mntner: str) -> dict:
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ret = {}
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for objectType in self.index:
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for objectFile in self.index[objectType]:
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if mntner in self.index[objectType][objectFile]["mnt-by"]:
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if objectType in ret:
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ret[objectType][objectFile] = self.index[objectType][objectFile]
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else:
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ret[objectType] = {
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objectFile: self.index[objectType][objectFile]}
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return ret
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# check if index is not yet initialized
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if self.index == {}:
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print("INFO: requested get_object, but index not yet created")
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self._build_index()
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if mntner in self._cache["mntner-objects"]:
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if self._cache["expired"]:
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# if the cache is expired: clear cache and reset "expired"
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self._cache["mntner-objects"] = {}
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self._cache["expired"] = False
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ret = _load_by_mntner(mntner)
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self._cache["mntner-objects"][mntner] = ret
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if ret == {}:
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return False, f"no objects found for {mntner}"
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return True, ret
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else:
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return True, self._cache["mntner-objects"][mntner]
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else:
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ret = _load_by_mntner(mntner)
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self._cache["mntner-objects"][mntner] = ret
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if ret == {}:
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return False, f"no objects found for {mntner}"
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return True, ret
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def _save_object_to_file(self, objectType: str, objectFile: str):
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with open(f"{self.registryPath}/data/{objectType}/{objectFile}", "w") as f:
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f.writelines(self.index[objectType][objectFile]["_content"])
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def store_object(self, objectType: str, objectFile: str, content: iter):
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if objectType in self.index:
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if objectFile in self.index[objectType]:
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if type(content) == str:
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self.index[objectType][objectFile]["_content"] = [
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f"{line}\n" for line in content.split("\n")]
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elif type(content) in [list, tuple, iter]:
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for line in content:
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if type(line) != str:
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raise ValueError(
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f"content is {type(content)} instead of str or list of str")
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self.index[objectType][objectFile]["_content"] = content
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else:
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raise ValueError(
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f"content is {type(content)} instead of str or list of str")
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else:
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raise KeyError(
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f"type {objectType}/{objectFile} doesn't exist in index")
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else:
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raise KeyError(f"type {objectType} doesn't exist in index")
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self._save_object_to_file(objectType, objectFile)
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self._cache["expired"] = True
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self._cache["mntner-objects"] = {}
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if __name__ == "__main__":
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reg = Registry("dn42-registry")
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reg._build_index()
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print(reg.get_all_by_mntner("LARE-MNT"))
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