def GetDefaultProxyInfo(method='http'):
"""Get ProxyInfo from environment.
This function is meant to mimic httplib2.proxy_info_from_environment, but get
the proxy information from urllib.getproxies instead. urllib can also get
proxy information from Windows Internet Explorer settings or MacOSX framework
SystemConfiguration.
Args:
method: protocol string
Returns:
httplib2 ProxyInfo object or None
"""
proxy_dict = urllib.getproxies()
proxy_url = proxy_dict.get(method, None)
if not proxy_url:
return None
pi = httplib2.proxy_info_from_url(proxy_url, method)
# The ProxyInfo object has a bypass_host method that takes the hostname as an
# argument and it returns 1 or 0 based on if the hostname should bypass the
# proxy or not. We could either build the bypassed hosts list and pass it to
# pi.bypass_hosts, or we can just replace the method with the function in
# urllib, and completely mimic urllib logic. We do the latter.
# Since the urllib.proxy_bypass _function_ (no self arg) is not "bound" to the
# class instance, it doesn't receive the self arg when its called. We don't
# need to "bind" it via types.MethodType(urllib.proxy_bypass, pi).
pi.bypass_host = urllib.proxy_bypass
return pi
def ProxyInfoFromEnvironmentVar(proxy_env_var):
"""Reads proxy info from the environment and converts to httplib2.ProxyInfo.
Args:
proxy_env_var: Environment variable string to read, such as http_proxy or
https_proxy.
Returns:
httplib2.ProxyInfo constructed from the environment string.
"""
proxy_url = os.environ.get(proxy_env_var)
if not proxy_url or not proxy_env_var.lower().startswith('http'):
return httplib2.ProxyInfo(httplib2.socks.PROXY_TYPE_HTTP, None, 0)
proxy_protocol = proxy_env_var.lower().split('_')[0]
if not proxy_url.lower().startswith('http'):
# 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)
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.warn("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)
def get_gcs_proxy_info(self):
if CONF.backup_gcs_proxy_url:
return httplib2.proxy_info_from_url(CONF.backup_gcs_proxy_url)
else:
return httplib2.proxy_info_from_environment()
def test_from_url_ident():
pi = httplib2.proxy_info_from_url("http://*****:*****@someproxy:99")
assert pi.proxy_host == "someproxy"
assert pi.proxy_port == 99
assert pi.proxy_user == "zoidberg"
assert pi.proxy_pass == "fish"
def test_from_url():
pi = httplib2.proxy_info_from_url("http://myproxy.example.com")
assert pi.proxy_host == "myproxy.example.com"
assert pi.proxy_port == 80
assert pi.proxy_user is None
