257 lines
9.1 KiB
Python
257 lines
9.1 KiB
Python
# -*- coding: utf-8 -*-
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"""
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proxy.py
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~~~~~~~~
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⚡⚡⚡ Fast, Lightweight, Pluggable, TLS interception capable proxy server focused on
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Network monitoring, controls & Application development, testing, debugging.
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:copyright: (c) 2013-present by Abhinav Singh and contributors.
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:license: BSD, see LICENSE for more details.
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"""
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import unittest
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import selectors
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import json
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from urllib import parse as urlparse
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from unittest import mock
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from typing import cast
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from proxy.common.flags import Flags
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from proxy.core.connection import TcpClientConnection
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from proxy.http.handler import HttpProtocolHandler
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from proxy.http.proxy import HttpProxyPlugin
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from proxy.common.utils import build_http_request, bytes_, build_http_response
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from proxy.common.constants import PROXY_AGENT_HEADER_VALUE, DEFAULT_HTTP_PORT
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from proxy.http.codes import httpStatusCodes
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from proxy.plugin import ProposedRestApiPlugin, RedirectToCustomServerPlugin
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from .utils import get_plugin_by_test_name
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class TestHttpProxyPluginExamples(unittest.TestCase):
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@mock.patch('selectors.DefaultSelector')
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@mock.patch('socket.fromfd')
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def setUp(self,
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mock_fromfd: mock.Mock,
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mock_selector: mock.Mock) -> None:
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self.fileno = 10
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self._addr = ('127.0.0.1', 54382)
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self.flags = Flags()
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self.plugin = mock.MagicMock()
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self.mock_fromfd = mock_fromfd
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self.mock_selector = mock_selector
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plugin = get_plugin_by_test_name(self._testMethodName)
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self.flags.plugins = {
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b'HttpProtocolHandlerPlugin': [HttpProxyPlugin],
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b'HttpProxyBasePlugin': [plugin],
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}
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self._conn = mock_fromfd.return_value
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self.protocol_handler = HttpProtocolHandler(
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TcpClientConnection(self._conn, self._addr),
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flags=self.flags)
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self.protocol_handler.initialize()
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@mock.patch('proxy.http.proxy.server.TcpServerConnection')
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def test_modify_post_data_plugin(
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self, mock_server_conn: mock.Mock) -> None:
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original = b'{"key": "value"}'
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modified = b'{"key": "modified"}'
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self._conn.recv.return_value = build_http_request(
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b'POST', b'http://httpbin.org/post',
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headers={
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b'Host': b'httpbin.org',
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b'Content-Type': b'application/x-www-form-urlencoded',
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b'Content-Length': bytes_(len(original)),
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},
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body=original
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)
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self.mock_selector.return_value.select.side_effect = [
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[(selectors.SelectorKey(
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fileobj=self._conn,
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fd=self._conn.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)], ]
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self.protocol_handler.run_once()
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mock_server_conn.assert_called_with('httpbin.org', DEFAULT_HTTP_PORT)
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mock_server_conn.return_value.queue.assert_called_with(
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build_http_request(
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b'POST', b'/post',
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headers={
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b'Host': b'httpbin.org',
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b'Content-Length': bytes_(len(modified)),
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b'Content-Type': b'application/json',
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b'Via': b'1.1 %s' % PROXY_AGENT_HEADER_VALUE,
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},
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body=modified
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)
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)
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@mock.patch('proxy.http.proxy.server.TcpServerConnection')
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def test_proposed_rest_api_plugin(
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self, mock_server_conn: mock.Mock) -> None:
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path = b'/v1/users/'
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self._conn.recv.return_value = build_http_request(
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b'GET', b'http://%s%s' % (
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ProposedRestApiPlugin.API_SERVER, path),
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headers={
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b'Host': ProposedRestApiPlugin.API_SERVER,
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}
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)
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self.mock_selector.return_value.select.side_effect = [
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[(selectors.SelectorKey(
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fileobj=self._conn,
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fd=self._conn.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)], ]
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self.protocol_handler.run_once()
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mock_server_conn.assert_not_called()
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self.assertEqual(
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self.protocol_handler.client.buffer[0].tobytes(),
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build_http_response(
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httpStatusCodes.OK, reason=b'OK',
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headers={b'Content-Type': b'application/json'},
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body=bytes_(
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json.dumps(
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ProposedRestApiPlugin.REST_API_SPEC[path]))
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))
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@mock.patch('proxy.http.proxy.server.TcpServerConnection')
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def test_redirect_to_custom_server_plugin(
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self, mock_server_conn: mock.Mock) -> None:
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request = build_http_request(
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b'GET', b'http://example.org/get',
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headers={
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b'Host': b'example.org',
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}
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)
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self._conn.recv.return_value = request
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self.mock_selector.return_value.select.side_effect = [
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[(selectors.SelectorKey(
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fileobj=self._conn,
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fd=self._conn.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)], ]
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self.protocol_handler.run_once()
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upstream = urlparse.urlsplit(
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RedirectToCustomServerPlugin.UPSTREAM_SERVER)
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mock_server_conn.assert_called_with('localhost', 8899)
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mock_server_conn.return_value.queue.assert_called_with(
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build_http_request(
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b'GET', upstream.path,
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headers={
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b'Host': upstream.netloc,
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b'Via': b'1.1 %s' % PROXY_AGENT_HEADER_VALUE,
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}
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)
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)
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@mock.patch('proxy.http.proxy.server.TcpServerConnection')
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def test_filter_by_upstream_host_plugin(
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self, mock_server_conn: mock.Mock) -> None:
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request = build_http_request(
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b'GET', b'http://google.com/',
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headers={
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b'Host': b'google.com',
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}
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)
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self._conn.recv.return_value = request
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self.mock_selector.return_value.select.side_effect = [
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[(selectors.SelectorKey(
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fileobj=self._conn,
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fd=self._conn.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)], ]
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self.protocol_handler.run_once()
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mock_server_conn.assert_not_called()
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self.assertEqual(
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self.protocol_handler.client.buffer[0].tobytes(),
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build_http_response(
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status_code=httpStatusCodes.I_AM_A_TEAPOT,
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reason=b'I\'m a tea pot',
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headers={
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b'Connection': b'close'
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},
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)
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)
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@mock.patch('proxy.http.proxy.server.TcpServerConnection')
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def test_man_in_the_middle_plugin(
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self, mock_server_conn: mock.Mock) -> None:
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request = build_http_request(
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b'GET', b'http://super.secure/',
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headers={
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b'Host': b'super.secure',
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}
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)
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self._conn.recv.return_value = request
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server = mock_server_conn.return_value
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server.connect.return_value = True
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def has_buffer() -> bool:
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return cast(bool, server.queue.called)
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def closed() -> bool:
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return not server.connect.called
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server.has_buffer.side_effect = has_buffer
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type(server).closed = mock.PropertyMock(side_effect=closed)
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self.mock_selector.return_value.select.side_effect = [
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[(selectors.SelectorKey(
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fileobj=self._conn,
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fd=self._conn.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)],
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[(selectors.SelectorKey(
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fileobj=server.connection,
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fd=server.connection.fileno,
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events=selectors.EVENT_WRITE,
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data=None), selectors.EVENT_WRITE)],
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[(selectors.SelectorKey(
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fileobj=server.connection,
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fd=server.connection.fileno,
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events=selectors.EVENT_READ,
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data=None), selectors.EVENT_READ)], ]
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# Client read
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self.protocol_handler.run_once()
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mock_server_conn.assert_called_with('super.secure', DEFAULT_HTTP_PORT)
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server.connect.assert_called_once()
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queued_request = \
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build_http_request(
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b'GET', b'/',
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headers={
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b'Host': b'super.secure',
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b'Via': b'1.1 %s' % PROXY_AGENT_HEADER_VALUE
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}
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)
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server.queue.assert_called_once_with(queued_request)
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# Server write
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self.protocol_handler.run_once()
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server.flush.assert_called_once()
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# Server read
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server.recv.return_value = \
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build_http_response(
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httpStatusCodes.OK,
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reason=b'OK', body=b'Original Response From Upstream')
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self.protocol_handler.run_once()
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self.assertEqual(
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self.protocol_handler.client.buffer[0].tobytes(),
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build_http_response(
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httpStatusCodes.OK,
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reason=b'OK', body=b'Hello from man in the middle')
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)
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