119 lines
3.1 KiB
Python
119 lines
3.1 KiB
Python
__package__ = 'archivebox.plugantic'
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from typing import Optional, List, Literal, Annotated, Dict, Any
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from typing_extensions import Self
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from abc import ABC
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from pathlib import Path
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from pydantic import BaseModel, model_validator, field_serializer, AfterValidator
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from .binaries import (
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Binary,
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YtdlpBinary,
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WgetBinary,
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)
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# stubs
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class Snapshot:
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pass
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class ArchiveResult:
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pass
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def get_wget_output_path(*args, **kwargs) -> Path:
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return Path('.').resolve()
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def no_empty_args(args: List[str]) -> List[str]:
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assert all(len(arg) for arg in args)
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return args
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ExtractorName = Literal['wget', 'warc', 'media']
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HandlerFuncStr = Annotated[str, AfterValidator(lambda s: s.startswith('self.'))]
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CmdArgsList = Annotated[List[str], AfterValidator(no_empty_args)]
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class Extractor(ABC, BaseModel):
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name: ExtractorName
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binary: Binary
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output_path_func: HandlerFuncStr = 'self.get_output_path'
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should_extract_func: HandlerFuncStr = 'self.should_extract'
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extract_func: HandlerFuncStr = 'self.extract'
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exec_func: HandlerFuncStr = 'self.exec'
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default_args: CmdArgsList = []
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extra_args: CmdArgsList = []
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args: Optional[CmdArgsList] = None
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@model_validator(mode='after')
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def validate_model(self) -> Self:
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if self.args is None:
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self.args = [*self.default_args, *self.extra_args]
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return self
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@field_serializer('binary', when_used='json')
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def dump_binary(binary) -> str:
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return binary.name
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def get_output_path(self, snapshot) -> Path:
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return Path(self.name)
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def should_extract(self, snapshot) -> bool:
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output_dir = self.get_output_path(snapshot)
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if output_dir.glob('*.*'):
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return False
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return True
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def extract(self, url: str, **kwargs) -> Dict[str, Any]:
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output_dir = self.get_output_path(url, **kwargs)
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cmd = [url, *self.args] if self.args is not None else [url, *self.default_args, *self.extra_args]
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proc = self.exec(cmd, pwd=output_dir)
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return {
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'status': 'succeeded' if proc.returncode == 0 else 'failed',
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'output': proc.stdout.decode().strip().split('\n')[-1],
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'output_files': list(output_dir.glob('*.*')),
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'stdout': proc.stdout.decode().strip(),
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'stderr': proc.stderr.decode().strip(),
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'returncode': proc.returncode,
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}
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def exec(self, args: CmdArgsList, pwd: Optional[Path]=None):
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pwd = pwd or Path('.')
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assert self.binary.loaded_provider
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return self.binary.exec(args, pwd=pwd)
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class YtdlpExtractor(Extractor):
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name: ExtractorName = 'media'
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binary: Binary = YtdlpBinary()
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def get_output_path(self, snapshot) -> Path:
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return Path(self.name)
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class WgetExtractor(Extractor):
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name: ExtractorName = 'wget'
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binary: Binary = WgetBinary()
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def get_output_path(self, snapshot) -> Path:
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return get_wget_output_path(snapshot)
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class WarcExtractor(Extractor):
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name: ExtractorName = 'warc'
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binary: Binary = WgetBinary()
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def get_output_path(self, snapshot) -> Path:
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return get_wget_output_path(snapshot)
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