mirror of
https://github.com/ansible-collections/community.docker.git
synced 2025-12-15 11:32:05 +00:00
1f2817fa20
* Bump version to 5.0.0-a1. * Drop support for ansible-core 2.15 and 2.16. * Remove Python 2 and early Python 3 compatibility.
87 lines
2.6 KiB
Python
87 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
|
|
# This code is part of the Ansible collection community.docker, but is an independent component.
|
|
# This particular file, and this file only, is based on the Docker SDK for Python (https://github.com/docker/docker-py/)
|
|
#
|
|
# Copyright (c) 2016-2022 Docker, Inc.
|
|
#
|
|
# It is licensed under the Apache 2.0 license (see LICENSES/Apache-2.0.txt in this collection)
|
|
# SPDX-License-Identifier: Apache-2.0
|
|
|
|
from __future__ import annotations
|
|
|
|
import json
|
|
import json.decoder
|
|
|
|
from ..errors import StreamParseError
|
|
|
|
|
|
json_decoder = json.JSONDecoder()
|
|
|
|
|
|
def stream_as_text(stream):
|
|
"""
|
|
Given a stream of bytes or text, if any of the items in the stream
|
|
are bytes convert them to text.
|
|
This function can be removed once we return text streams
|
|
instead of byte streams.
|
|
"""
|
|
for data in stream:
|
|
if not isinstance(data, str):
|
|
data = data.decode('utf-8', 'replace')
|
|
yield data
|
|
|
|
|
|
def json_splitter(buffer):
|
|
"""Attempt to parse a json object from a buffer. If there is at least one
|
|
object, return it and the rest of the buffer, otherwise return None.
|
|
"""
|
|
buffer = buffer.strip()
|
|
try:
|
|
obj, index = json_decoder.raw_decode(buffer)
|
|
rest = buffer[json.decoder.WHITESPACE.match(buffer, index).end():]
|
|
return obj, rest
|
|
except ValueError:
|
|
return None
|
|
|
|
|
|
def json_stream(stream):
|
|
"""Given a stream of text, return a stream of json objects.
|
|
This handles streams which are inconsistently buffered (some entries may
|
|
be newline delimited, and others are not).
|
|
"""
|
|
return split_buffer(stream, json_splitter, json_decoder.decode)
|
|
|
|
|
|
def line_splitter(buffer, separator=u'\n'):
|
|
index = buffer.find(str(separator))
|
|
if index == -1:
|
|
return None
|
|
return buffer[:index + 1], buffer[index + 1:]
|
|
|
|
|
|
def split_buffer(stream, splitter=None, decoder=lambda a: a):
|
|
"""Given a generator which yields strings and a splitter function,
|
|
joins all input, splits on the separator and yields each chunk.
|
|
Unlike string.split(), each chunk includes the trailing
|
|
separator, except for the last one if none was found on the end
|
|
of the input.
|
|
"""
|
|
splitter = splitter or line_splitter
|
|
buffered = ''
|
|
|
|
for data in stream_as_text(stream):
|
|
buffered += data
|
|
while True:
|
|
buffer_split = splitter(buffered)
|
|
if buffer_split is None:
|
|
break
|
|
|
|
item, buffered = buffer_split
|
|
yield item
|
|
|
|
if buffered:
|
|
try:
|
|
yield decoder(buffered)
|
|
except Exception as e:
|
|
raise StreamParseError(e)
|