Source code for apache_beam.internal.http_client

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

"""Utility functions used for creating a common Http client from httplib2.

For internal use only. No backwards compatibility guarantees.
"""
# pytype: skip-file

from __future__ import absolute_import

import logging
import os
import re

import httplib2

# This is the number of seconds the library will wait for GCS operations to
# complete.
DEFAULT_HTTP_TIMEOUT_SECONDS = 60


[docs]def proxy_info_from_environment_var(proxy_env_var): """Reads proxy info from the environment and converts to httplib2.ProxyInfo. Args: proxy_env_var: environment variable string to read, http_proxy or https_proxy (in lower case). Example: http://myproxy.domain.com:8080 Returns: httplib2.ProxyInfo constructed from the environment string. """ proxy_url = os.environ.get(proxy_env_var) if not proxy_url: return None proxy_protocol = proxy_env_var.lower().split('_')[0] if not re.match('^https?://', proxy_url, flags=re.IGNORECASE): logging.warning( "proxy_info_from_url requires a protocol, which is always " "http or https.") proxy_url = proxy_protocol + '://' + proxy_url return httplib2.proxy_info_from_url(proxy_url, method=proxy_protocol)
[docs]def get_new_http(): """Creates and returns a new httplib2.Http instance. Returns: An initialized httplib2.Http instance. """ proxy_info = None for proxy_env_var in ['http_proxy', 'https_proxy']: if os.environ.get(proxy_env_var): proxy_info = proxy_info_from_environment_var(proxy_env_var) break # Use a non-infinite SSL timeout to avoid hangs during network flakiness. return httplib2.Http( proxy_info=proxy_info, timeout=DEFAULT_HTTP_TIMEOUT_SECONDS)