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b13aec0f2b
* added auth to iter_url and created custom open for http fs * added default value to auth * Update dvc/utils/http.py Co-authored-by: Ruslan Kuprieiev <[email protected]> * Update dvc/fs/http.py Co-authored-by: Ruslan Kuprieiev <[email protected]> * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * pr fixes Co-authored-by: Ruslan Kuprieiev <[email protected]> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
import io
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from contextlib import contextmanager
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from dvc.utils.stream import IterStream
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@contextmanager
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def open_url(url, mode="r", encoding=None, **iter_opts):
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"""Opens an url as a readable stream.
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Resumes on connection error.
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Url could be a string or a callable returning a string.
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"""
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assert mode in {"r", "rt", "rb"}
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with iter_url(url, **iter_opts) as (response, it):
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bytes_stream = IterStream(it)
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if mode == "rb":
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yield bytes_stream
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else:
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encoding = encoding or response.encoding
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yield io.TextIOWrapper(bytes_stream, encoding=encoding)
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@contextmanager
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def iter_url(url, chunk_size=io.DEFAULT_BUFFER_SIZE, auth=None):
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"""Iterate over chunks requested from url."""
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import requests
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def request(headers=None):
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the_url = url() if callable(url) else url
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response = requests.get(
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the_url, stream=True, headers=headers, auth=auth
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)
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if response.status_code == 404:
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raise FileNotFoundError(f"Can't open {the_url}")
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response.raise_for_status()
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return response
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def gen(response):
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try:
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pos = 0
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while True:
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try:
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for chunk in response.iter_content(chunk_size):
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pos += len(chunk)
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yield chunk
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break
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except requests.ConnectionError:
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response.close()
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if response.headers.get("Accept-Ranges") != "bytes":
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raise
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# Reopen request from where we stopped
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headers = {"Range": f"bytes={pos}-"}
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response = request(headers)
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finally:
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response.close()
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response = request()
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it = gen(response)
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try:
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yield response, it
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finally:
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# Ensure connection is closed
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it.close()
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