Karim shoair
141 lines
3.8 KiB
Python
141 lines
3.8 KiB
Python
import logging
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import re
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from itertools import chain
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import orjson
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from lxml import html
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from scrapling.core._types import Any, Dict, Iterable, Union, List
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# Using cache on top of a class is a brilliant way to achieve a Singleton design pattern without much code
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from functools import lru_cache # isort:skip
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html_forbidden = {
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html.HtmlComment,
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}
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@lru_cache(1, typed=True)
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def setup_logger():
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"""Create and configure a logger with a standard format.
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:returns: logging.Logger: Configured logger instance
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"""
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logger = logging.getLogger("scrapling")
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logger.setLevel(logging.INFO)
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formatter = logging.Formatter(
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fmt="[%(asctime)s] %(levelname)s: %(message)s", datefmt="%Y-%m-%d %H:%M:%S"
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)
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console_handler = logging.StreamHandler()
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console_handler.setFormatter(formatter)
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# Add handler to logger (if not already added)
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if not logger.handlers:
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logger.addHandler(console_handler)
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return logger
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log = setup_logger()
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def is_jsonable(content: bytes | str) -> bool:
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if isinstance(content, bytes):
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content = content.decode()
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try:
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_ = orjson.loads(content)
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return True
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except orjson.JSONDecodeError:
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return False
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def flatten(lst: Iterable[Any]) -> List[Any]:
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return list(chain.from_iterable(lst))
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def _is_iterable(obj: Any) -> bool:
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# This will be used only in regex functions to make sure it's iterable but not string/bytes
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return isinstance(
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obj,
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(
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list,
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tuple,
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),
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)
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class _StorageTools:
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@staticmethod
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def __clean_attributes(element: html.HtmlElement, forbidden: tuple = ()) -> Dict:
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if not element.attrib:
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return {}
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return {
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k: v.strip()
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for k, v in element.attrib.items()
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if v and v.strip() and k not in forbidden
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}
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@classmethod
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def element_to_dict(cls, element: html.HtmlElement) -> Dict:
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parent = element.getparent()
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result = {
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"tag": str(element.tag),
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"attributes": cls.__clean_attributes(element),
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"text": element.text.strip() if element.text else None,
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"path": cls._get_element_path(element),
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}
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if parent is not None:
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result.update(
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{
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"parent_name": parent.tag,
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"parent_attribs": dict(parent.attrib),
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"parent_text": parent.text.strip() if parent.text else None,
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}
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)
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siblings = [
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child.tag for child in parent.iterchildren() if child != element
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]
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if siblings:
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result.update({"siblings": tuple(siblings)})
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children = [
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child.tag
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for child in element.iterchildren()
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if type(child) not in html_forbidden
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]
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if children:
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result.update({"children": tuple(children)})
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return result
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@classmethod
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def _get_element_path(cls, element: html.HtmlElement):
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parent = element.getparent()
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return tuple(
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(element.tag,)
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if parent is None
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else (cls._get_element_path(parent) + (element.tag,))
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)
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# def _root_type_verifier(method):
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# # Just to make sure we are safe
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# @wraps(method)
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# def _impl(self, *args, **kw):
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# # All html types inherits from HtmlMixin so this to check for all at once
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# if not issubclass(type(self._root), html.HtmlMixin):
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# raise ValueError(f"Cannot use function on a Node of type {type(self._root)!r}")
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# return method(self, *args, **kw)
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# return _impl
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@lru_cache(128, typed=True)
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def clean_spaces(string):
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string = string.replace("\t", " ")
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string = re.sub("[\n|\r]", "", string)
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return re.sub(" +", " ", string)
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