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import select
import socket
import contextlib
import threading
from tests import unittest
from contextlib import contextmanager
import botocore.session
from botocore.config import Config
from six.moves import BaseHTTPServer, socketserver
from botocore.exceptions import (
ConnectTimeoutError, ReadTimeoutError, EndpointConnectionError,
ConnectionClosedError,
)
from requests import exceptions as requests_exceptions
class TestClientHTTPBehavior(unittest.TestCase):
def setUp(self):
self.port = unused_port()
self.localhost = 'http://localhost:%s/' % self.port
self.session = botocore.session.get_session()
@unittest.skip('Test has suddenly become extremely flakey.')
def test_can_proxy_https_request_with_auth(self):
proxy_url = 'http://user:pass@localhost:%s/' % self.port
config = Config(proxies={'https': proxy_url}, region_name='us-west-1')
client = self.session.create_client('ec2', config=config)
class AuthProxyHandler(ProxyHandler):
event = threading.Event()
def validate_auth(self):
proxy_auth = self.headers.get('Proxy-Authorization')
return proxy_auth == 'Basic dXNlcjpwYXNz'
try:
with background(run_server, args=(AuthProxyHandler, self.port)):
AuthProxyHandler.event.wait(timeout=60)
client.describe_regions()
except BackgroundTaskFailed:
self.fail('Background task did not exit, proxy was not used.')
def _read_timeout_server(self):
config = Config(
read_timeout=0.1,
retries={'max_attempts': 0},
region_name='us-weast-2',
)
client = self.session.create_client('ec2', endpoint_url=self.localhost,
config=config)
client_call_ended_event = threading.Event()
class FakeEC2(SimpleHandler):
event = threading.Event()
msg = b'<response/>'
def get_length(self):
return len(self.msg)
def get_body(self):
client_call_ended_event.wait(timeout=60)
return self.msg
try:
with background(run_server, args=(FakeEC2, self.port)):
try:
FakeEC2.event.wait(timeout=60)
client.describe_regions()
finally:
client_call_ended_event.set()
except BackgroundTaskFailed:
self.fail('Fake EC2 service was not called.')
def test_read_timeout_exception(self):
with self.assertRaises(ReadTimeoutError):
self._read_timeout_server()
def test_old_read_timeout_exception(self):
with self.assertRaises(requests_exceptions.ReadTimeout):
self._read_timeout_server()
@unittest.skip('The current implementation will fail to timeout on linux')
def test_connect_timeout_exception(self):
config = Config(
connect_timeout=0.2,
retries={'max_attempts': 0},
region_name='us-weast-2',
)
client = self.session.create_client('ec2', endpoint_url=self.localhost,
config=config)
server_bound_event = threading.Event()
client_call_ended_event = threading.Event()
def no_accept_server():
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('', self.port))
server_bound_event.set()
client_call_ended_event.wait(timeout=60)
sock.close()
with background(no_accept_server):
server_bound_event.wait(timeout=60)
with self.assertRaises(ConnectTimeoutError):
client.describe_regions()
client_call_ended_event.set()
def test_invalid_host_gaierror(self):
config = Config(retries={'max_attempts': 0}, region_name='us-weast-1')
endpoint = 'https://ec2.us-weast-1.amazonaws.com/'
client = self.session.create_client('ec2', endpoint_url=endpoint,
config=config)
with self.assertRaises(EndpointConnectionError):
client.describe_regions()
def test_bad_status_line(self):
config = Config(retries={'max_attempts': 0}, region_name='us-weast-2')
client = self.session.create_client('ec2', endpoint_url=self.localhost,
config=config)
class BadStatusHandler(BaseHTTPServer.BaseHTTPRequestHandler):
event = threading.Event()
def do_POST(self):
self.wfile.write(b'garbage')
with background(run_server, args=(BadStatusHandler, self.port)):
with self.assertRaises(ConnectionClosedError):
BadStatusHandler.event.wait(timeout=60)
client.describe_regions()
def unused_port():
with contextlib.closing(socket.socket()) as sock:
sock.bind(('127.0.0.1', 0))
return sock.getsockname()[1]
class SimpleHandler(BaseHTTPServer.BaseHTTPRequestHandler):
status = 200
def get_length(self):
return 0
def get_body(self):
return b''
def do_GET(self):
length = str(self.get_length())
self.send_response(self.status)
self.send_header('Content-Length', length)
self.end_headers()
self.wfile.write(self.get_body())
do_POST = do_PUT = do_GET
class ProxyHandler(BaseHTTPServer.BaseHTTPRequestHandler):
tunnel_chunk_size = 1024
def _tunnel(self, client, remote):
client.setblocking(0)
remote.setblocking(0)
sockets = [client, remote]
while True:
readable, writeable, _ = select.select(sockets, sockets, [], 1)
if client in readable and remote in writeable:
client_bytes = client.recv(self.tunnel_chunk_size)
if not client_bytes:
break
remote.sendall(client_bytes)
if remote in readable and client in writeable:
remote_bytes = remote.recv(self.tunnel_chunk_size)
if not remote_bytes:
break
client.sendall(remote_bytes)
def do_CONNECT(self):
if not self.validate_auth():
self.send_response(401)
self.end_headers()
return
self.send_response(200)
self.end_headers()
remote_host, remote_port = self.path.split(':')
remote_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
remote_socket.connect((remote_host, int(remote_port)))
self._tunnel(self.request, remote_socket)
remote_socket.close()
def validate_auth(self):
return True
class BackgroundTaskFailed(Exception):
pass
@contextmanager
def background(target, args=(), timeout=60):
thread = threading.Thread(target=target, args=args)
thread.daemon = True
thread.start()
try:
yield target
finally:
thread.join(timeout=timeout)
if thread.is_alive():
msg = 'Background task did not exit in a timely manner.'
raise BackgroundTaskFailed(msg)
def run_server(handler, port):
address = ('', port)
httpd = socketserver.TCPServer(address, handler, bind_and_activate=False)
httpd.allow_reuse_address = True
httpd.server_bind()
httpd.server_activate()
handler.event.set()
httpd.handle_request()
httpd.server_close()
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