86 lines
2.3 KiB
Python
86 lines
2.3 KiB
Python
__package__ = 'archivebox.extractors'
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import re
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from typing import Optional
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from ..index.schema import Link, ArchiveResult, ArchiveOutput, ArchiveError
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from ..util import (
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enforce_types,
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is_static_file,
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download_url,
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htmldecode,
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)
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from ..config import (
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TIMEOUT,
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CHECK_SSL_VALIDITY,
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SAVE_TITLE,
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CURL_BINARY,
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CURL_VERSION,
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CURL_USER_AGENT,
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setup_django,
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)
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from ..logging_util import TimedProgress
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HTML_TITLE_REGEX = re.compile(
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r'<title.*?>' # start matching text after <title> tag
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r'(.[^<>]+)', # get everything up to these symbols
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re.IGNORECASE | re.MULTILINE | re.DOTALL | re.UNICODE,
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)
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@enforce_types
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def should_save_title(link: Link, out_dir: Optional[str]=None) -> bool:
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# if link already has valid title, skip it
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if link.title and not link.title.lower().startswith('http'):
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return False
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if is_static_file(link.url):
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return False
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return SAVE_TITLE
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@enforce_types
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def save_title(link: Link, out_dir: Optional[str]=None, timeout: int=TIMEOUT) -> ArchiveResult:
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"""try to guess the page's title from its content"""
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setup_django(out_dir=out_dir)
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from core.models import Snapshot
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output: ArchiveOutput = None
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cmd = [
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CURL_BINARY,
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'--silent',
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'--max-time', str(timeout),
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'--location',
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'--compressed',
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*(['--user-agent', '{}'.format(CURL_USER_AGENT)] if CURL_USER_AGENT else []),
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*([] if CHECK_SSL_VALIDITY else ['--insecure']),
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link.url,
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]
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status = 'succeeded'
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timer = TimedProgress(timeout, prefix=' ')
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try:
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html = download_url(link.url, timeout=timeout)
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match = re.search(HTML_TITLE_REGEX, html)
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output = htmldecode(match.group(1).strip()) if match else None
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if output:
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if not link.title or len(output) >= len(link.title):
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Snapshot.objects.filter(url=link.url, timestamp=link.timestamp).update(title=output)
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else:
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raise ArchiveError('Unable to detect page title')
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except Exception as err:
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status = 'failed'
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output = err
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finally:
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timer.end()
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return ArchiveResult(
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cmd=cmd,
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pwd=out_dir,
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cmd_version=CURL_VERSION,
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output=output,
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status=status,
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**timer.stats,
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)
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