Source code for langchain_community.document_loaders.mhtml

import email
import logging
from pathlib import Path
from typing import Dict, Iterator, Union

from langchain_core.documents import Document

from langchain_community.document_loaders.base import BaseLoader

logger = logging.getLogger(__name__)

[docs]class MHTMLLoader(BaseLoader): """Parse `MHTML` files with `BeautifulSoup`."""
[docs] def __init__( self, file_path: Union[str, Path], open_encoding: Union[str, None] = None, bs_kwargs: Union[dict, None] = None, get_text_separator: str = "", ) -> None: """initialize with path, and optionally, file encoding to use, and any kwargs to pass to the BeautifulSoup object. Args: file_path: Path to file to load. open_encoding: The encoding to use when opening the file. bs_kwargs: Any kwargs to pass to the BeautifulSoup object. get_text_separator: The separator to use when getting the text from the soup. """ try: import bs4 # noqa:F401 except ImportError: raise ImportError( "beautifulsoup4 package not found, please install it with " "`pip install beautifulsoup4`" ) self.file_path = file_path self.open_encoding = open_encoding if bs_kwargs is None: bs_kwargs = {"features": "lxml"} self.bs_kwargs = bs_kwargs self.get_text_separator = get_text_separator
[docs] def lazy_load(self) -> Iterator[Document]: """Load MHTML document into document objects.""" from bs4 import BeautifulSoup with open(self.file_path, "r", encoding=self.open_encoding) as f: message = email.message_from_string( parts = message.get_payload() if not isinstance(parts, list): parts = [message] for part in parts: if part.get_content_type() == "text/html": # type: ignore[union-attr] html = part.get_payload(decode=True).decode() # type: ignore[union-attr] soup = BeautifulSoup(html, **self.bs_kwargs) text = soup.get_text(self.get_text_separator) if soup.title: title = str(soup.title.string) else: title = "" metadata: Dict[str, Union[str, None]] = { "source": str(self.file_path), "title": title, } yield Document(page_content=text, metadata=metadata) return