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import os
import re
import socket
from threading import Thread
import pytest
from pyhttpd.conf import HttpdConf
from pyhttpd.result import ExecResult
class UDSFaker:
def __init__(self, path):
self._uds_path = path
self._done = False
def start(self):
def process(self):
self._socket.listen(1)
self._process()
try:
os.unlink(self._uds_path)
except OSError:
if os.path.exists(self._uds_path):
raise
self._socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
self._socket.bind(self._uds_path)
self._thread = Thread(target=process, daemon=True, args=[self])
self._thread.start()
def stop(self):
self._done = True
self._socket.close()
def _process(self):
while self._done is False:
try:
c, client_address = self._socket.accept()
try:
data = c.recv(16)
c.sendall("""HTTP/1.1 200 Ok
Server: UdsFaker
Content-Type: application/json
Content-Length: 19
{ "host": "faked" }""".encode())
finally:
c.close()
except ConnectionAbortedError:
self._done = True
class TestProxyUds:
@pytest.fixture(autouse=True, scope='class')
def _class_scope(self, env):
# setup 3 vhosts on https: for reverse, forward and
# mixed proxying to a unix: domain socket
# We setup a UDSFaker running that returns a fixed response
UDS_PATH = f"{env.gen_dir}/proxy_02.sock"
TestProxyUds.UDS_PATH = UDS_PATH
faker = UDSFaker(path=UDS_PATH)
faker.start()
conf = HttpdConf(env)
conf.add("ProxyPreserveHost on")
conf.start_vhost(domains=[env.d_reverse], port=env.https_port)
conf.add([
f"ProxyPass / unix:{UDS_PATH}|http://127.0.0.1:{env.http_port}/"
])
conf.end_vhost()
conf.start_vhost(domains=[env.d_forward], port=env.https_port)
conf.add([
"ProxyRequests on"
])
conf.end_vhost()
conf.start_vhost(domains=[env.d_mixed], port=env.https_port)
conf.add([
f"ProxyPass / unix:{UDS_PATH}|http://127.0.0.1:{env.http_port}/",
"ProxyRequests on"
])
conf.end_vhost()
conf.install()
assert env.apache_restart() == 0
yield
faker.stop()
@pytest.mark.parametrize(["via", "seen"], [
["reverse", "faked"],
["mixed", "faked"],
])
def test_proxy_02_001(self, env, via, seen):
# make requests to a reverse proxy https: vhost to the http: vhost
# check that we see the document we expect there (host matching worked)
r = env.curl_get(f"https://{via}.{env.http_tld}:{env.https_port}/alive.json", 5)
assert r.response["status"] == 200
assert r.json['host'] == seen
@pytest.mark.parametrize(["via", "seen"], [
["forward", "generic"],
["mixed", "faked"],
])
def test_proxy_02_002(self, env, via, seen):
# make requests to a forward proxy https: vhost to the http: vhost
# check that we see the document we expect there (host matching worked)
# we need to explicitly provide a Host: header since mod_proxy cannot
# resolve the name via DNS.
domain = f"{via}.{env.http_tld}"
r = env.curl_get(f"http://127.0.0.1:{env.http_port}/alive.json", 5, options=[
'-H', f"Host: {domain}",
'--proxy', f"https://{domain}:{env.https_port}/",
'--resolve', f"{domain}:{env.https_port}:127.0.0.1",
'--proxy-cacert', f"{env.get_ca_pem_file(domain)}",
])
assert r.exit_code == 0, f"{r.stdout}{r.stderr}"
assert r.response["status"] == 200
assert r.json['host'] == seen
@pytest.mark.parametrize(["via", "exp_status"], [
["reverse", 400],
["forward", 500],
["mixed", 500],
])
def test_proxy_02_003(self, env, via, exp_status):
# make requests to a forward proxy https: vhost and GET
# a URL which carries the unix: domain socket.
# This needs to fail.
domain = f"{via}.{env.http_tld}"
r = env.run(args=[
'openssl', 's_client', '-connect', f"127.0.0.1:{env.https_port}",
'-servername', domain,
'-crlf', '-ign_eof',
'-CAfile', env.get_ca_pem_file(domain)
], intext=f"""GET unix:{TestProxyUds.UDS_PATH}|http://127.0.0.1:{env.http_port}/alive.json HTTP/1.1
Host: {domain}
""")
assert r.exit_code == 0, f"{r.stdout}{r.stderr}"
lines = r.stdout.split('\n')
rlines = None
for idx, l in enumerate(lines):
if l.startswith('HTTP/'):
rlines = lines[idx:]
assert rlines, f"No response found in: {r.stdout}"
r2 = self.parse_response(rlines)
assert r2.response
assert r2.response['status'] == exp_status
def parse_response(self, lines) -> ExecResult:
exp_body = False
exp_stat = True
r = ExecResult(args=[], exit_code=0, stdout=b'', stderr=b'')
header = {}
body = []
for line in lines:
if exp_stat:
m = re.match(r'^(\S+) (\d+) (.*)$', line)
assert m, f"first line no HTTP status line: {line}"
r.add_response({
"protocol": m.group(1),
"status": int(m.group(2)),
"description": m.group(3),
"body": r.outraw
})
header = {}
exp_stat = False
exp_body = False
elif re.match(r'^\r?$', line):
exp_body = True
elif exp_body:
body.append(line)
else:
m = re.match(r'^([^:]+):\s*(.*)$', line)
assert m, f"not a header line: {line}"
header[m.group(1).lower()] = m.group(2)
if r.response:
r.response["header"] = header
r.response["body"] = body
return r
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