mirror of
https://github.com/sissbruecker/linkding
synced 2024-11-22 11:23:02 +00:00
83 lines
2.7 KiB
Python
83 lines
2.7 KiB
Python
import logging
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import mimetypes
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import os.path
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import re
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import time
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from pathlib import Path
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from urllib.parse import urlparse
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import requests
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from django.conf import settings
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max_file_age = 60 * 60 * 24 # 1 day
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logger = logging.getLogger(__name__)
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# register mime type for .ico files, which is not included in the default
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# mimetypes of the Docker image
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mimetypes.add_type("image/x-icon", ".ico")
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def _ensure_favicon_folder():
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Path(settings.LD_FAVICON_FOLDER).mkdir(parents=True, exist_ok=True)
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def _url_to_filename(url: str) -> str:
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return re.sub(r"\W+", "_", url)
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def _get_url_parameters(url: str) -> dict:
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parsed_uri = urlparse(url)
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return {
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# https://example.com/foo?bar -> https://example.com
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"url": f"{parsed_uri.scheme}://{parsed_uri.hostname}",
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# https://example.com/foo?bar -> example.com
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"domain": parsed_uri.hostname,
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}
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def _get_favicon_path(favicon_file: str) -> Path:
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return Path(os.path.join(settings.LD_FAVICON_FOLDER, favicon_file))
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def _check_existing_favicon(favicon_name: str):
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# return existing file if a file with the same name, ignoring extension,
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# exists and is not stale
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for filename in os.listdir(settings.LD_FAVICON_FOLDER):
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file_base_name, _ = os.path.splitext(filename)
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if file_base_name == favicon_name:
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favicon_path = _get_favicon_path(filename)
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return filename if not _is_stale(favicon_path) else None
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return None
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def _is_stale(path: Path) -> bool:
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stat = path.stat()
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file_age = time.time() - stat.st_mtime
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return file_age >= max_file_age
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def load_favicon(url: str) -> str:
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url_parameters = _get_url_parameters(url)
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# Create favicon folder if not exists
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_ensure_favicon_folder()
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# Use scheme+hostname as favicon filename to reuse icon for all pages on the same domain
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favicon_name = _url_to_filename(url_parameters["url"])
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favicon_file = _check_existing_favicon(favicon_name)
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if not favicon_file:
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# Load favicon from provider, save to file
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favicon_url = settings.LD_FAVICON_PROVIDER.format(**url_parameters)
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logger.debug(f"Loading favicon from: {favicon_url}")
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with requests.get(favicon_url, stream=True) as response:
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content_type = response.headers["Content-Type"]
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file_extension = mimetypes.guess_extension(content_type)
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favicon_file = f"{favicon_name}{file_extension}"
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favicon_path = _get_favicon_path(favicon_file)
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with open(favicon_path, "wb") as file:
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for chunk in response.iter_content(chunk_size=8192):
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file.write(chunk)
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logger.debug(f"Saved favicon as: {favicon_path}")
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return favicon_file
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