73 lines
1.8 KiB
Python
73 lines
1.8 KiB
Python
# -*- coding: utf-8 -*- #
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# Copyright 2020 Google LLC. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Read JSON objects from a stream."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from __future__ import unicode_literals
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import contextlib
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import json
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import six
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def ReadJsonStream(file_obj):
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"""Read the events from the skaffold event stream.
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Args:
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file_obj: A File object.
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Yields:
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Event dicts from the JSON payloads.
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"""
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for line in _ReadStreamingLines(file_obj):
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if not line:
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continue
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yield json.loads(six.ensure_str(line))
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if six.PY3:
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def _ReadStreamingLines(file_obj):
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with contextlib.suppress(ConnectionResetError):
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for line in file_obj:
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yield line
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elif six.PY2:
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def _ReadStreamingLines(file_obj):
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"""Python 2 compatibility with py3's streaming behavior.
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If file_obj is an HTTPResponse, iterating over lines blocks until a buffer
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is full.
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Args:
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file_obj: A file-like object, including HTTPResponse.
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Yields:
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Lines, like iter(file_obj) but without buffering stalls.
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"""
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while True:
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line = b''
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while True:
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byte = file_obj.read(1)
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if not byte:
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return
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if byte == b'\n':
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break
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line += byte
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yield line
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