89 lines
2.9 KiB
Python
89 lines
2.9 KiB
Python
import asyncio
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import gzip
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import logging
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import shutil
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import tempfile
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import sys
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from dataclasses import dataclass
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from urllib.parse import urlparse
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from pathlib import Path
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import aiohttp
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log = logging.getLogger(__name__)
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@dataclass
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class Context:
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session: aiohttp.ClientSession
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async def main():
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wanted_date = sys.argv[1]
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urls = (
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f"https://e621.net/db_export/tags-{wanted_date}.csv.gz",
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f"https://e621.net/db_export/posts-{wanted_date}.csv.gz",
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)
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async with aiohttp.ClientSession() as session:
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ctx = Context(session)
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for url in urls:
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parsed = urlparse(url)
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parsed_path = Path(parsed.path)
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output_path = Path.cwd() / parsed_path.name
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if output_path.exists():
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log.info("file %s already exists, ignoring", output_path)
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continue
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log.info("downloading %r into %s", url, output_path)
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async with ctx.session.get(url) as resp:
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assert resp.status == 200
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total_length = int(resp.headers["content-length"])
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downloaded_bytes = 0
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download_ratio = 0
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log.info("to download %d bytes", total_length)
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with tempfile.TemporaryFile() as temp_fd:
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async for chunk in resp.content.iter_chunked(8192):
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temp_fd.write(chunk)
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downloaded_bytes += len(chunk)
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new_download_ratio = round(
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(downloaded_bytes / total_length) * 100
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)
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if new_download_ratio != download_ratio:
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log.info("download at %d%%", download_ratio)
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download_ratio = new_download_ratio
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temp_fd.seek(0)
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# write to output
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log.info("copying temp to output")
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with output_path.open(mode="wb") as output_fd:
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shutil.copyfileobj(temp_fd, output_fd)
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# decompress
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for url in urls:
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parsed = urlparse(url)
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parsed_path = Path(parsed.path)
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input_path = Path.cwd() / parsed_path.name
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original_name, original_extension, _gz = parsed_path.name.split(".")
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output_path = Path.cwd() / f"{original_name}.{original_extension}"
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if output_path.exists():
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log.info("decompressed file %s already exists, ignoring", output_path)
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continue
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log.info("decompressing %s into %s", input_path.name, output_path.name)
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with gzip.open(input_path, "rb") as in_fd:
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with output_path.open(mode="wb") as out_fd:
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shutil.copyfileobj(in_fd, out_fd)
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# now that everythings downloaded, compile the db
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if __name__ == "__main__":
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logging.basicConfig(level=logging.INFO)
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asyncio.run(main())
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