import logging
import sys
import threading
import random
import time
import urllib.parse
import http.server
import socketserver
import string
import socket
import struct
INF_COUNT = 100000000
def _and_then(value, func):
assert callable(func)
return None if value is None else func(value)
class MockControl:
def __init__(self, cluster, container, port):
self._cluster = cluster
self._container = container
self._port = port
def reset(self):
response = self._cluster.exec_in_container(
self._cluster.get_container_id(self._container),
[
"curl",
"-s",
f"http://localhost:{self._port}/mock_settings/reset",
],
nothrow=True,
)
assert response == "OK", response
def setup_action(self, when, count=None, after=None, action=None, action_args=None):
url = f"http://localhost:{self._port}/mock_settings/{when}?nothing=1"
if count is not None:
url += f"&count={count}"
if after is not None:
url += f"&after={after}"
if action is not None:
url += f"&action={action}"
if action_args is not None:
for x in action_args:
url += f"&action_args={x}"
response = self._cluster.exec_in_container(
self._cluster.get_container_id(self._container),
[
"curl",
"-s",
url,
],
nothrow=True,
)
assert response == "OK", response
def setup_at_object_upload(self, **kwargs):
self.setup_action("at_object_upload", **kwargs)
def setup_at_part_upload(self, **kwargs):
self.setup_action("at_part_upload", **kwargs)
def setup_at_create_multi_part_upload(self, **kwargs):
self.setup_action("at_create_multi_part_upload", **kwargs)
def setup_fake_puts(self, part_length):
response = self._cluster.exec_in_container(
self._cluster.get_container_id(self._container),
[
"curl",
"-s",
f"http://localhost:{self._port}/mock_settings/fake_puts?when_length_bigger={part_length}",
],
nothrow=True,
)
assert response == "OK", response
def setup_fake_multpartuploads(self):
response = self._cluster.exec_in_container(
self._cluster.get_container_id(self._container),
[
"curl",
"-s",
f"http://localhost:{self._port}/mock_settings/setup_fake_multpartuploads?",
],
nothrow=True,
)
assert response == "OK", response
def setup_slow_answers(
self, minimal_length=0, timeout=None, probability=None, count=None
):
url = (
f"http://localhost:{self._port}/"
f"mock_settings/slow_put"
f"?minimal_length={minimal_length}"
)
if timeout is not None:
url += f"&timeout={timeout}"
if probability is not None:
url += f"&probability={probability}"
if count is not None:
url += f"&count={count}"
response = self._cluster.exec_in_container(
self._cluster.get_container_id(self._container),
["curl", "-s", url],
nothrow=True,
)
assert response == "OK", response
class _ServerRuntime:
class SlowPut:
def __init__(
self,
lock,
probability_=None,
timeout_=None,
minimal_length_=None,
count_=None,
):
self.lock = lock
self.probability = probability_ if probability_ is not None else 1
self.timeout = timeout_ if timeout_ is not None else 0.1
self.minimal_length = minimal_length_ if minimal_length_ is not None else 0
self.count = count_ if count_ is not None else INF_COUNT
def __str__(self):
return (
f"probability:{self.probability}"
f" timeout:{self.timeout}"
f" minimal_length:{self.minimal_length}"
f" count:{self.count}"
)
def get_timeout(self, content_length):
with self.lock:
if content_length > self.minimal_length:
if self.count > 0:
if (
_runtime.slow_put.probability == 1
or random.random() <= _runtime.slow_put.probability
):
self.count -= 1
return _runtime.slow_put.timeout
return None
class Expected500ErrorAction:
def inject_error(self, request_handler):
data = (
''
""
"ExpectedError"
"mock s3 injected error"
"txfbd566d03042474888193-00608d7537"
""
)
request_handler.write_error(data)
class RedirectAction:
def __init__(self, host="localhost", port=1):
self.dst_host = _and_then(host, str)
self.dst_port = _and_then(port, int)
def inject_error(self, request_handler):
request_handler.redirect(host=self.dst_host, port=self.dst_port)
class ConnectionResetByPeerAction:
def __init__(self, with_partial_data=None):
self.partial_data = ""
if with_partial_data is not None and with_partial_data == "1":
self.partial_data = (
'\n'
"\n"
)
def inject_error(self, request_handler):
request_handler.read_all_input()
if self.partial_data:
request_handler.send_response(200)
request_handler.send_header("Content-Type", "text/xml")
request_handler.send_header("Content-Length", 10000)
request_handler.end_headers()
request_handler.wfile.write(bytes(self.partial_data, "UTF-8"))
time.sleep(1)
request_handler.connection.setsockopt(
socket.SOL_SOCKET, socket.SO_LINGER, struct.pack("ii", 1, 0)
)
request_handler.connection.close()
class BrokenPipeAction:
def inject_error(self, request_handler):
# partial read
self.rfile.read(50)
time.sleep(1)
request_handler.connection.setsockopt(
socket.SOL_SOCKET, socket.SO_LINGER, struct.pack("ii", 1, 0)
)
request_handler.connection.close()
class ConnectionRefusedAction(RedirectAction):
pass
class CountAfter:
def __init__(
self, lock, count_=None, after_=None, action_=None, action_args_=[]
):
self.lock = lock
self.count = count_ if count_ is not None else INF_COUNT
self.after = after_ if after_ is not None else 0
self.action = action_
self.action_args = action_args_
if self.action == "connection_refused":
self.error_handler = _ServerRuntime.ConnectionRefusedAction()
elif self.action == "connection_reset_by_peer":
self.error_handler = _ServerRuntime.ConnectionResetByPeerAction(
*self.action_args
)
elif self.action == "broken_pipe":
self.error_handler = _ServerRuntime.BrokenPipeAction()
elif self.action == "redirect_to":
self.error_handler = _ServerRuntime.RedirectAction(*self.action_args)
else:
self.error_handler = _ServerRuntime.Expected500ErrorAction()
@staticmethod
def from_cgi_params(lock, params):
return _ServerRuntime.CountAfter(
lock=lock,
count_=_and_then(params.get("count", [None])[0], int),
after_=_and_then(params.get("after", [None])[0], int),
action_=params.get("action", [None])[0],
action_args_=params.get("action_args", []),
)
def __str__(self):
return f"count:{self.count} after:{self.after} action:{self.action} action_args:{self.action_args}"
def has_effect(self):
with self.lock:
if self.after:
self.after -= 1
if self.after == 0:
if self.count:
self.count -= 1
return True
return False
def inject_error(self, request_handler):
self.error_handler.inject_error(request_handler)
def __init__(self):
self.lock = threading.Lock()
self.at_part_upload = None
self.at_object_upload = None
self.fake_put_when_length_bigger = None
self.fake_uploads = dict()
self.slow_put = None
self.fake_multipart_upload = None
self.at_create_multi_part_upload = None
def register_fake_upload(self, upload_id, key):
with self.lock:
self.fake_uploads[upload_id] = key
def is_fake_upload(self, upload_id, key):
with self.lock:
if upload_id in self.fake_uploads:
return self.fake_uploads[upload_id] == key
return False
def reset(self):
with self.lock:
self.at_part_upload = None
self.at_object_upload = None
self.fake_put_when_length_bigger = None
self.fake_uploads = dict()
self.slow_put = None
self.fake_multipart_upload = None
self.at_create_multi_part_upload = None
_runtime = _ServerRuntime()
def get_random_string(length):
# choose from all lowercase letter
letters = string.ascii_lowercase
result_str = "".join(random.choice(letters) for i in range(length))
return result_str
class RequestHandler(http.server.BaseHTTPRequestHandler):
def _ok(self):
self.send_response(200)
self.send_header("Content-Type", "text/plain")
self.end_headers()
self.wfile.write(b"OK")
def _ping(self):
self._ok()
def read_all_input(self):
content_length = int(self.headers.get("Content-Length", 0))
to_read = content_length
while to_read > 0:
# read content in order to avoid error on client
# Poco::Exception. Code: 1000, e.code() = 32, I/O error: Broken pipe
# do it piece by piece in order to avoid big allocation
size = min(to_read, 1024)
str(self.rfile.read(size))
to_read -= size
def redirect(self, host=None, port=None):
if host is None and port is None:
host = self.server.upstream_host
port = self.server.upstream_port
self.read_all_input()
self.send_response(307)
url = f"http://{host}:{port}{self.path}"
self.log_message("redirect to %s", url)
self.send_header("Location", url)
self.end_headers()
self.wfile.write(b"Redirected")
def write_error(self, data, content_length=None):
if content_length is None:
content_length = len(data)
self.log_message("write_error %s", data)
self.read_all_input()
self.send_response(500)
self.send_header("Content-Type", "text/xml")
self.send_header("Content-Length", str(content_length))
self.end_headers()
if data:
self.wfile.write(bytes(data, "UTF-8"))
def _fake_put_ok(self):
self.log_message("fake put")
self.read_all_input()
self.send_response(200)
self.send_header("Content-Type", "text/xml")
self.send_header("ETag", "b54357faf0632cce46e942fa68356b38")
self.send_header("Content-Length", 0)
self.end_headers()
def _fake_uploads(self, path, upload_id):
self.read_all_input()
parts = [x for x in path.split("/") if x]
bucket = parts[0]
key = "/".join(parts[1:])
data = (
'\n'
"\n"
f"{bucket}"
f"{key}"
f"{upload_id}"
""
)
self.send_response(200)
self.send_header("Content-Type", "text/xml")
self.send_header("Content-Length", len(data))
self.end_headers()
self.wfile.write(bytes(data, "UTF-8"))
def _fake_post_ok(self, path):
self.read_all_input()
parts = [x for x in path.split("/") if x]
bucket = parts[0]
key = "/".join(parts[1:])
location = "http://Example-Bucket.s3.Region.amazonaws.com/" + path
data = (
'\n'
"\n"
f"{location}\n"
f"{bucket}\n"
f"{key}\n"
f'"3858f62230ac3c915f300c664312c11f-9"\n'
f"\n"
)
self.send_response(200)
self.send_header("Content-Type", "text/xml")
self.send_header("Content-Length", len(data))
self.end_headers()
self.wfile.write(bytes(data, "UTF-8"))
def _mock_settings(self):
parts = urllib.parse.urlsplit(self.path)
path = [x for x in parts.path.split("/") if x]
assert path[0] == "mock_settings", path
if len(path) < 2:
return self.write_error("_mock_settings: wrong command")
if path[1] == "at_part_upload":
params = urllib.parse.parse_qs(parts.query, keep_blank_values=False)
_runtime.at_part_upload = _ServerRuntime.CountAfter.from_cgi_params(
_runtime.lock, params
)
self.log_message("set at_part_upload %s", _runtime.at_part_upload)
return self._ok()
if path[1] == "at_object_upload":
params = urllib.parse.parse_qs(parts.query, keep_blank_values=False)
_runtime.at_object_upload = _ServerRuntime.CountAfter.from_cgi_params(
_runtime.lock, params
)
self.log_message("set at_object_upload %s", _runtime.at_object_upload)
return self._ok()
if path[1] == "fake_puts":
params = urllib.parse.parse_qs(parts.query, keep_blank_values=False)
_runtime.fake_put_when_length_bigger = int(
params.get("when_length_bigger", [1024 * 1024])[0]
)
self.log_message("set fake_puts %s", _runtime.fake_put_when_length_bigger)
return self._ok()
if path[1] == "slow_put":
params = urllib.parse.parse_qs(parts.query, keep_blank_values=False)
_runtime.slow_put = _ServerRuntime.SlowPut(
lock=_runtime.lock,
minimal_length_=_and_then(params.get("minimal_length", [None])[0], int),
probability_=_and_then(params.get("probability", [None])[0], float),
timeout_=_and_then(params.get("timeout", [None])[0], float),
count_=_and_then(params.get("count", [None])[0], int),
)
self.log_message("set slow put %s", _runtime.slow_put)
return self._ok()
if path[1] == "setup_fake_multpartuploads":
_runtime.fake_multipart_upload = True
self.log_message("set setup_fake_multpartuploads")
return self._ok()
if path[1] == "at_create_multi_part_upload":
params = urllib.parse.parse_qs(parts.query, keep_blank_values=False)
_runtime.at_create_multi_part_upload = (
_ServerRuntime.CountAfter.from_cgi_params(_runtime.lock, params)
)
self.log_message(
"set at_create_multi_part_upload %s",
_runtime.at_create_multi_part_upload,
)
return self._ok()
if path[1] == "reset":
_runtime.reset()
self.log_message("reset")
return self._ok()
return self.write_error("_mock_settings: wrong command")
def do_GET(self):
if self.path == "/":
return self._ping()
if self.path.startswith("/mock_settings"):
return self._mock_settings()
self.log_message("get redirect")
return self.redirect()
def do_PUT(self):
content_length = int(self.headers.get("Content-Length", 0))
if _runtime.slow_put is not None:
timeout = _runtime.slow_put.get_timeout(content_length)
if timeout is not None:
self.log_message("slow put %s", timeout)
time.sleep(timeout)
parts = urllib.parse.urlsplit(self.path)
params = urllib.parse.parse_qs(parts.query, keep_blank_values=False)
upload_id = params.get("uploadId", [None])[0]
if upload_id is not None:
if _runtime.at_part_upload is not None:
self.log_message(
"put at_part_upload %s, %s, %s",
_runtime.at_part_upload,
upload_id,
parts,
)
if _runtime.at_part_upload.has_effect():
return _runtime.at_part_upload.inject_error(self)
if _runtime.fake_multipart_upload:
if _runtime.is_fake_upload(upload_id, parts.path):
return self._fake_put_ok()
else:
if _runtime.at_object_upload is not None:
if _runtime.at_object_upload.has_effect():
self.log_message(
"put error_at_object_upload %s, %s",
_runtime.at_object_upload,
parts,
)
return _runtime.at_object_upload.inject_error(self)
if _runtime.fake_put_when_length_bigger is not None:
if content_length > _runtime.fake_put_when_length_bigger:
self.log_message(
"put fake_put_when_length_bigger %s, %s, %s",
_runtime.fake_put_when_length_bigger,
content_length,
parts,
)
return self._fake_put_ok()
self.log_message(
"put redirect %s",
parts,
)
return self.redirect()
def do_POST(self):
parts = urllib.parse.urlsplit(self.path)
params = urllib.parse.parse_qs(parts.query, keep_blank_values=True)
uploads = params.get("uploads", [None])[0]
if uploads is not None:
if _runtime.at_create_multi_part_upload is not None:
if _runtime.at_create_multi_part_upload.has_effect():
return _runtime.at_create_multi_part_upload.inject_error(self)
if _runtime.fake_multipart_upload:
upload_id = get_random_string(5)
_runtime.register_fake_upload(upload_id, parts.path)
return self._fake_uploads(parts.path, upload_id)
upload_id = params.get("uploadId", [None])[0]
if _runtime.is_fake_upload(upload_id, parts.path):
return self._fake_post_ok(parts.path)
return self.redirect()
def do_HEAD(self):
self.redirect()
def do_DELETE(self):
self.redirect()
class _ThreadedHTTPServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
"""Handle requests in a separate thread."""
def set_upstream(self, upstream_host, upstream_port):
self.upstream_host = upstream_host
self.upstream_port = upstream_port
if __name__ == "__main__":
httpd = _ThreadedHTTPServer(("0.0.0.0", int(sys.argv[1])), RequestHandler)
if len(sys.argv) == 4:
httpd.set_upstream(sys.argv[2], sys.argv[3])
else:
httpd.set_upstream("minio1", 9001)
httpd.serve_forever()