163 lines
5.3 KiB
Python
163 lines
5.3 KiB
Python
# Config entries
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# by Humans for All
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#
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from dataclasses import dataclass, field, fields
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from typing import Any, Optional
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import http.server
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import ssl
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import sys
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import urlvalidator as mUV
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import debug as mDebug
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gConfigNeeded = [ 'acl.schemes', 'acl.domains', 'sec.bearerAuth' ]
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@dataclass
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class DictDataclassMixin(dict):
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"""
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Mixin to ensure dataclass attributes get mapped as dict keys in __post_init__
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"""
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def __post_init__(self):
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"""
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Skip if already set using maybe say dict init mechanism or ...
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"""
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for f in fields(self):
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if f.name not in self:
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self[f.name] = getattr(self, f.name)
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@dataclass
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class Sec(DictDataclassMixin, dict):
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"""
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Used to store security related config entries
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"""
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certFile: str = ""
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keyFile: str = ""
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bearerAuth: str = ""
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@dataclass
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class ACL(DictDataclassMixin, dict):
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schemes: list[str] = field(default_factory=list)
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domains: list[str] = field(default_factory=list)
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@dataclass
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class Network(DictDataclassMixin, dict):
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port: int = 3128
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addr: str = ''
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@dataclass
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class Op(DictDataclassMixin, dict):
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configFile: str = "/dev/null"
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debug: bool = False
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server: http.server.ThreadingHTTPServer|None = None
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sslContext: ssl.SSLContext|None = None
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bearerTransformed: str = ""
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bearerTransformedYear: str = ""
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@dataclass
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class Config(DictDataclassMixin, dict):
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op: Op = field(default_factory=Op)
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sec: Sec = field(default_factory=Sec)
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acl: ACL = field(default_factory=ACL)
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nw: Network = field(default_factory=Network)
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def get_type(self, keyTree: str):
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cKeyList = keyTree.split('.')
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cur = self
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for k in cKeyList[:-1]:
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cur = self[k]
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return type(cur[cKeyList[-1]])
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def get_value(self, keyTree: str):
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cKeyList = keyTree.split('.')
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cur = self
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for k in cKeyList[:-1]:
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cur = self[k]
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return cur[cKeyList[-1]]
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def set_value(self, keyTree: str, value: Any):
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cKeyList = keyTree.split('.')
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cur = self
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for k in cKeyList[:-1]:
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cur = self[k]
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cur[cKeyList[-1]] = value
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def validate(self):
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for k in gConfigNeeded:
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if self.get_value(k) == None:
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print(f"ERRR:ProcessArgs:Missing:{k}:did you forget to pass the config file...")
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exit(104)
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mDebug.setup(self.op.debug)
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if (self.acl.schemes and self.acl.domains):
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mUV.validator_setup(self.acl.schemes, self.acl.domains)
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def load_config(self, configFile: str):
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"""
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Allow loading of a json based config file
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The config entries should be named same as their equivalent cmdline argument
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entries but without the -- prefix.
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As far as the logic is concerned the entries could either come from cmdline
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or from a json based config file.
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"""
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import json
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self.op.configFile = configFile
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with open(self.op.configFile) as f:
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cfgs: dict[str, Any] = json.load(f)
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for cfg in cfgs:
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print(f"DBUG:LoadConfig:{cfg}")
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try:
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neededType = self.get_type(cfg)
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gotValue = cfgs[cfg]
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gotType = type(gotValue)
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if gotType.__name__ != neededType.__name__:
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print(f"ERRR:LoadConfig:{cfg}:expected type [{neededType}] got type [{gotType}]")
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exit(112)
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self.set_value(cfg, gotValue)
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except KeyError:
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print(f"ERRR:LoadConfig:{cfg}:UnknownConfig!")
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exit(113)
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def process_args(self, args: list[str]):
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"""
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Helper to process command line arguments.
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Flow setup below such that
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* location of --config in commandline will decide whether command line or config file will get
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priority wrt setting program parameters.
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* str type values in cmdline are picked up directly, without running them through ast.literal_eval,
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bcas otherwise one will have to ensure throught the cmdline arg mechanism that string quote is
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retained for literal_eval
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"""
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import ast
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print(self)
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iArg = 1
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while iArg < len(args):
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cArg = args[iArg]
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if (not cArg.startswith("--")):
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print(f"ERRR:ProcessArgs:{iArg}:{cArg}:MalformedCommandOr???")
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exit(101)
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cArg = cArg[2:]
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print(f"DBUG:ProcessArgs:{iArg}:{cArg}")
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try:
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aTypeCheck = self.get_type(cArg)
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aValue = args[iArg+1]
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if aTypeCheck.__name__ != 'str':
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aValue = ast.literal_eval(aValue)
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aType = type(aValue)
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if aType.__name__ != aTypeCheck.__name__:
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print(f"ERRR:ProcessArgs:{iArg}:{cArg}:expected type [{aTypeCheck}] got type [{aType}]")
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exit(102)
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self.set_value(cArg, aValue)
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iArg += 2
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if cArg == 'op.configFile':
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self.load_config(aValue)
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except KeyError:
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print(f"ERRR:ProcessArgs:{iArg}:{cArg}:UnknownArgCommand!:{sys.exception()}")
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exit(103)
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print(self)
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self.validate()
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