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import pytest
from urllib3.exceptions import MaxRetryError, NewConnectionError, ProxyError
from urllib3.poolmanager import ProxyManager
from urllib3.util.retry import Retry
from urllib3.util.url import parse_url
from .port_helpers import find_unused_port
class TestProxyManager(object):
@pytest.mark.parametrize("proxy_scheme", ["http", "https"])
def test_proxy_headers(self, proxy_scheme):
url = "http://pypi.org/project/urllib3/"
proxy_url = "{}://something:1234".format(proxy_scheme)
with ProxyManager(proxy_url) as p:
# Verify default headers
default_headers = {"Accept": "*/*", "Host": "pypi.org"}
headers = p._set_proxy_headers(url)
assert headers == default_headers
# Verify default headers don't overwrite provided headers
provided_headers = {
"Accept": "application/json",
"custom": "header",
"Host": "test.python.org",
}
headers = p._set_proxy_headers(url, provided_headers)
assert headers == provided_headers
# Verify proxy with nonstandard port
provided_headers = {"Accept": "application/json"}
expected_headers = provided_headers.copy()
expected_headers.update({"Host": "pypi.org:8080"})
url_with_port = "http://pypi.org:8080/project/urllib3/"
headers = p._set_proxy_headers(url_with_port, provided_headers)
assert headers == expected_headers
def test_default_port(self):
with ProxyManager("http://something") as p:
assert p.proxy.port == 80
with ProxyManager("https://something") as p:
assert p.proxy.port == 443
def test_invalid_scheme(self):
with pytest.raises(AssertionError):
ProxyManager("invalid://host/p")
with pytest.raises(ValueError):
ProxyManager("invalid://host/p")
def test_proxy_tunnel(self):
http_url = parse_url("http://example.com")
https_url = parse_url("https://example.com")
with ProxyManager("http://proxy:8080") as p:
assert p._proxy_requires_url_absolute_form(http_url)
assert p._proxy_requires_url_absolute_form(https_url) is False
with ProxyManager("https://proxy:8080") as p:
assert p._proxy_requires_url_absolute_form(http_url)
assert p._proxy_requires_url_absolute_form(https_url) is False
with ProxyManager("https://proxy:8080", use_forwarding_for_https=True) as p:
assert p._proxy_requires_url_absolute_form(http_url)
assert p._proxy_requires_url_absolute_form(https_url)
def test_proxy_connect_retry(self):
retry = Retry(total=None, connect=False)
port = find_unused_port()
with ProxyManager("http://localhost:{}".format(port)) as p:
with pytest.raises(ProxyError) as ei:
p.urlopen("HEAD", url="http://localhost/", retries=retry)
assert isinstance(ei.value.original_error, NewConnectionError)
retry = Retry(total=None, connect=2)
with ProxyManager("http://localhost:{}".format(port)) as p:
with pytest.raises(MaxRetryError) as ei:
p.urlopen("HEAD", url="http://localhost/", retries=retry)
assert isinstance(ei.value.reason.original_error, NewConnectionError)
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