96 lines
2.8 KiB
Python
96 lines
2.8 KiB
Python
__package__ = 'archivebox.extractors'
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from pathlib import Path
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from tempfile import NamedTemporaryFile
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from typing import Optional
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import json
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from ..index.schema import Link, ArchiveResult, ArchiveError
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from ..system import run, atomic_write
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from ..util import (
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enforce_types,
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download_url,
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is_static_file,
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)
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from ..config import (
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TIMEOUT,
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CURL_BINARY,
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SAVE_MERCURY,
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DEPENDENCIES,
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MERCURY_VERSION,
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)
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from ..logging_util import TimedProgress
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@enforce_types
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def should_save_mercury(link: Link, out_dir: Optional[str]=None) -> bool:
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out_dir = out_dir or link.link_dir
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if is_static_file(link.url):
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return False
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output = Path(out_dir or link.link_dir) / 'mercury'
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return SAVE_MERCURY and MERCURY_VERSION and (not output.exists())
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@enforce_types
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def save_mercury(link: Link, out_dir: Optional[str]=None, timeout: int=TIMEOUT) -> ArchiveResult:
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"""download reader friendly version using @postlight/mercury-parser"""
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out_dir = Path(out_dir or link.link_dir)
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output_folder = out_dir.absolute() / "mercury"
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output = str(output_folder)
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status = 'succeeded'
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timer = TimedProgress(timeout, prefix=' ')
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try:
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cmd = [
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DEPENDENCIES['MERCURY_BINARY']['path'],
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link.url,
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"--format=text"
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]
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result = run(cmd, cwd=out_dir, timeout=timeout)
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txtresult_json = json.loads(result.stdout)
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cmd = [
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DEPENDENCIES['MERCURY_BINARY']['path'],
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link.url
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]
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result = run(cmd, cwd=out_dir, timeout=timeout)
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result_json = json.loads(result.stdout)
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output_folder.mkdir(exist_ok=True)
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atomic_write(str(output_folder / "content.html"), result_json.pop("content"))
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atomic_write(str(output_folder / "content.txt"), txtresult_json["content"])
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atomic_write(str(output_folder / "article.json"), result_json)
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# parse out number of files downloaded from last line of stderr:
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# "Downloaded: 76 files, 4.0M in 1.6s (2.52 MB/s)"
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output_tail = [
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line.strip()
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for line in (result.stdout + result.stderr).decode().rsplit('\n', 20)[-20:]
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if line.strip()
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]
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hints = (
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'Got mercury response code: {}.'.format(result.returncode),
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*output_tail,
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)
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# Check for common failure cases
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if (result.returncode > 0):
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raise ArchiveError('Mercury parser was not able to archive the page', hints)
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except (Exception, OSError) 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=str(out_dir),
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cmd_version=MERCURY_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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