mitmproxy/test/test_server.py

import socket, time
import mock
from netlib import tcp, http_auth, http
from libpathod import pathoc, pathod
import tutils, tservers
from libmproxy import flow
from libmproxy.protocol import KILL
from libmproxy.protocol.http import CONTENT_MISSING

"""
    Note that the choice of response code in these tests matters more than you
    might think. libcurl treats a 304 response code differently from, say, a
    200 response code - it will correctly terminate a 304 response with no
    content-length header, whereas it will block forever waiting for content
    for a 200 response.
"""

class CommonMixin:
    def test_large(self):
        assert len(self.pathod("200:b@50k").content) == 1024*50

    def test_replay(self):
        assert self.pathod("304").status_code == 304
        assert len(self.master.state.view) == 1
        l = self.master.state.view[0]
        assert l.response.code == 304
        l.request.path = "/p/305"
        rt = self.master.replay_request(l, block=True)
        assert l.response.code == 305

        # Disconnect error
        l.request.path = "/p/305:d0"
        rt = self.master.replay_request(l, block=True)
        assert l.error

        # Port error
        l.request.port = 1
        self.master.replay_request(l, block=True)
        assert l.error

    def test_http(self):
        f = self.pathod("304")
        assert f.status_code == 304

        l = self.master.state.view[0]
        assert l.client_conn.address
        assert "host" in l.request.headers
        assert l.response.code == 304

    def test_invalid_http(self):
        t = tcp.TCPClient(("127.0.0.1", self.proxy.port))
        t.connect()
        t.wfile.write("invalid\r\n\r\n")
        t.wfile.flush()
        line = t.rfile.readline()
        assert ("Bad Request" in line) or ("Bad Gateway" in line)



class AppMixin:
    def test_app(self):
        ret = self.app("/")
        assert ret.status_code == 200
        assert "mitmproxy" in ret.content



class TestHTTP(tservers.HTTPProxTest, CommonMixin, AppMixin):
    def test_app_err(self):
        p = self.pathoc()
        ret = p.request("get:'http://errapp/'")
        assert ret.status_code == 500
        assert "ValueError" in ret.content

    def test_invalid_connect(self):
        t = tcp.TCPClient(("127.0.0.1", self.proxy.port))
        t.connect()
        t.wfile.write("CONNECT invalid\n\n")
        t.wfile.flush()
        assert "Bad Request" in t.rfile.readline()

    def test_upstream_ssl_error(self):
        p = self.pathoc()
        ret = p.request("get:'https://localhost:%s/'"%self.server.port)
        assert ret.status_code == 400

    def test_connection_close(self):
        # Add a body, so we have a content-length header, which combined with
        # HTTP1.1 means the connection is kept alive.
        response = '%s/p/200:b@1'%self.server.urlbase

        # Lets sanity check that the connection does indeed stay open by
        # issuing two requests over the same connection
        p = self.pathoc()
        assert p.request("get:'%s'"%response)
        assert p.request("get:'%s'"%response)

        # Now check that the connection is closed as the client specifies
        p = self.pathoc()
        assert p.request("get:'%s':h'Connection'='close'"%response)
        tutils.raises("disconnect", p.request, "get:'%s'"%response)

    def test_reconnect(self):
        req = "get:'%s/p/200:b@1:da'"%self.server.urlbase
        p = self.pathoc()
        assert p.request(req)
        # Server has disconnected. Mitmproxy should detect this, and reconnect.
        assert p.request(req)
        assert p.request(req)

    def test_proxy_ioerror(self):
        # Tests a difficult-to-trigger condition, where an IOError is raised
        # within our read loop.
        with mock.patch("libmproxy.protocol.http.HTTPRequest.from_stream") as m:
            m.side_effect = IOError("error!")
            tutils.raises("server disconnect", self.pathod, "304")

    def test_get_connection_switching(self):
        def switched(l):
            for i in l:
                if "serverdisconnect" in i:
                    return True
        req = "get:'%s/p/200:b@1'"
        p = self.pathoc()
        assert p.request(req%self.server.urlbase)
        assert p.request(req%self.server2.urlbase)
        assert switched(self.proxy.log)

    def test_get_connection_err(self):
        p = self.pathoc()
        ret = p.request("get:'http://localhost:0'")
        assert ret.status_code == 502

    def test_blank_leading_line(self):
        p = self.pathoc()
        req = "get:'%s/p/201':i0,'\r\n'"
        assert p.request(req%self.server.urlbase).status_code == 201

    def test_invalid_headers(self):
        p = self.pathoc()
        req = p.request("get:'http://foo':h':foo'='bar'")
        assert req.status_code == 400

    def test_empty_chunked_content(self):
        """
        https://github.com/mitmproxy/mitmproxy/issues/186
        """
        connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        connection.connect(("127.0.0.1", self.proxy.port))
        spec = '301:h"Transfer-Encoding"="chunked":r:b"0\\r\\n\\r\\n"'
        connection.send("GET http://localhost:%d/p/%s HTTP/1.1\r\n"%(self.server.port, spec))
        connection.send("\r\n");
        resp = connection.recv(50000)
        connection.close()
        assert "content-length" in resp.lower()


class TestHTTPAuth(tservers.HTTPProxTest):
    authenticator = http_auth.BasicProxyAuth(http_auth.PassManSingleUser("test", "test"), "realm")
    def test_auth(self):
        assert self.pathod("202").status_code == 407
        p = self.pathoc()
        ret = p.request("""
            get
            'http://localhost:%s/p/202'
            h'%s'='%s'
        """%(
            self.server.port,
            http_auth.BasicProxyAuth.AUTH_HEADER,
            http.assemble_http_basic_auth("basic", "test", "test")
        ))
        assert ret.status_code == 202


class TestHTTPConnectSSLError(tservers.HTTPProxTest):
    certfile = True
    def test_go(self):
        p = self.pathoc_raw()
        dst = ("localhost", self.proxy.port)
        p.connect(connect_to=dst)
        tutils.raises("400 - Bad Request", p.http_connect, dst)


class TestHTTPS(tservers.HTTPProxTest, CommonMixin):
    ssl = True
    ssloptions = pathod.SSLOptions(request_client_cert=True)
    clientcerts = True
    def test_clientcert(self):
        f = self.pathod("304")
        assert f.status_code == 304
        assert self.server.last_log()["request"]["clientcert"]["keyinfo"]

    def test_sni(self):
        f = self.pathod("304", sni="testserver.com")
        assert f.status_code == 304
        l = self.server.last_log()
        assert self.server.last_log()["request"]["sni"] == "testserver.com"

    def test_error_post_connect(self):
        p = self.pathoc()
        assert p.request("get:/:i0,'invalid\r\n\r\n'").status_code == 400


class TestHTTPSCertfile(tservers.HTTPProxTest, CommonMixin):
    ssl = True
    certfile = True
    def test_certfile(self):
        assert self.pathod("304")


class TestHTTPSNoCommonName(tservers.HTTPProxTest):
    """
    Test what happens if we get a cert without common name back.
    """
    ssl = True
    ssloptions=pathod.SSLOptions(
            certs = [
                ("*", tutils.test_data.path("data/no_common_name.pem"))
            ]
        )
    def test_http(self):
        f = self.pathod("202")
        assert f.sslinfo.certchain[0].get_subject().CN == "127.0.0.1"


class TestReverse(tservers.ReverseProxTest, CommonMixin):
    reverse = True


class TestTransparent(tservers.TransparentProxTest, CommonMixin):
    ssl = False


class TestTransparentSSL(tservers.TransparentProxTest, CommonMixin):
    ssl = True
    def test_sni(self):
        f = self.pathod("304", sni="testserver.com")
        assert f.status_code == 304
        l = self.server.last_log()
        assert l["request"]["sni"] == "testserver.com"

    def test_sslerr(self):
        p = pathoc.Pathoc(("localhost", self.proxy.port))
        p.connect()
        r = p.request("get:/")
        assert r.status_code == 502


class TestProxy(tservers.HTTPProxTest):
    def test_http(self):
        f = self.pathod("304")
        assert f.status_code == 304

        f = self.master.state.view[0]
        assert f.client_conn.address
        assert "host" in f.request.headers
        assert f.response.code == 304

    def test_response_timestamps(self):
        # test that we notice at least 2 sec delay between timestamps
        # in response object
        f = self.pathod("304:b@1k:p50,1")
        assert f.status_code == 304

        response = self.master.state.view[0].response
        assert 1 <= response.timestamp_end - response.timestamp_start <= 1.2

    def test_request_timestamps(self):
        # test that we notice a delay between timestamps in request object
        connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        connection.connect(("127.0.0.1", self.proxy.port))

        # call pathod server, wait a second to complete the request
        connection.send("GET http://localhost:%d/p/304:b@1k HTTP/1.1\r\n"%self.server.port)
        time.sleep(1)
        connection.send("\r\n");
        connection.recv(50000)
        connection.close()

        request, response = self.master.state.view[0].request, self.master.state.view[0].response
        assert response.code == 304  # sanity test for our low level request
        assert 0.95 < (request.timestamp_end - request.timestamp_start) < 1.2 #time.sleep might be a little bit shorter than a second

    def test_request_timestamps_not_affected_by_client_time(self):
        # test that don't include user wait time in request's timestamps

        f = self.pathod("304:b@10k")
        assert f.status_code == 304
        f = self.pathod("304:b@10k")
        assert f.status_code == 304

        request = self.master.state.view[0].request
        assert request.timestamp_end - request.timestamp_start <= 0.1

        request = self.master.state.view[1].request
        assert request.timestamp_end - request.timestamp_start <= 0.1

    def test_request_tcp_setup_timestamp_presence(self):
        # tests that the client_conn a tcp connection has a tcp_setup_timestamp
        connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        connection.connect(("localhost", self.proxy.port))
        connection.send("GET http://localhost:%d/p/304:b@1k HTTP/1.1\r\n"%self.server.port)
        connection.send("\r\n");
        connection.recv(5000)
        connection.send("GET http://localhost:%d/p/304:b@1k HTTP/1.1\r\n"%self.server.port)
        connection.send("\r\n");
        connection.recv(5000)
        connection.close()

        first_flow = self.master.state.view[0]
        second_flow = self.master.state.view[1]
        assert first_flow.server_conn.timestamp_tcp_setup
        assert first_flow.server_conn.timestamp_ssl_setup is None
        assert second_flow.server_conn.timestamp_tcp_setup
        assert first_flow.server_conn.timestamp_tcp_setup == second_flow.server_conn.timestamp_tcp_setup

    def test_request_ip(self):
        f = self.pathod("200:b@100")
        assert f.status_code == 200
        f = self.master.state.view[0]
        assert f.server_conn.peername == ("127.0.0.1", self.server.port)

class TestProxySSL(tservers.HTTPProxTest):
    ssl=True
    def test_request_ssl_setup_timestamp_presence(self):
        # tests that the ssl timestamp is present when ssl is used
        f = self.pathod("304:b@10k")
        assert f.status_code == 304
        first_request = self.master.state.view[0].request
        assert first_request.flow.server_conn.timestamp_ssl_setup


class MasterRedirectRequest(tservers.TestMaster):
    def handle_request(self, request):
        if request.path == "/p/201":
            url = request.get_url()
            new = "http://127.0.0.1:%s/p/201" % self.redirect_port

            request.set_url(new)
            request.set_url(new)
            request.flow.change_server(("127.0.0.1", self.redirect_port), False)
            request.set_url(url)
            tutils.raises("SSL handshake error", request.flow.change_server, ("127.0.0.1", self.redirect_port), True)
            request.set_url(new)
            request.set_url(url)
            request.set_url(new)
        tservers.TestMaster.handle_request(self, request)

    def handle_response(self, response):
        response.content = str(response.flow.client_conn.address.port)
        tservers.TestMaster.handle_response(self, response)


class TestRedirectRequest(tservers.HTTPProxTest):
    masterclass = MasterRedirectRequest

    def test_redirect(self):
        self.master.redirect_port = self.server2.port

        p = self.pathoc()

        self.server.clear_log()
        self.server2.clear_log()
        r1 = p.request("get:'%s/p/200'"%self.server.urlbase)
        assert r1.status_code == 200
        assert self.server.last_log()
        assert not self.server2.last_log()

        self.server.clear_log()
        self.server2.clear_log()
        r2 = p.request("get:'%s/p/201'"%self.server.urlbase)
        assert r2.status_code == 201
        assert not self.server.last_log()
        assert self.server2.last_log()

        self.server.clear_log()
        self.server2.clear_log()
        r3 = p.request("get:'%s/p/202'"%self.server.urlbase)
        assert r3.status_code == 202
        assert self.server.last_log()
        assert not self.server2.last_log()

        assert r3.content == r2.content == r1.content
        # Make sure that we actually use the same connection in this test case

class MasterStreamRequest(tservers.TestMaster):
    """
        Enables the stream flag on the flow for all requests
    """
    def handle_responseheaders(self, r):
        r.stream = True
        r.reply()

class TestStreamRequest(tservers.HTTPProxTest):
    masterclass = MasterStreamRequest

    def test_stream_simple(self):
        p = self.pathoc()

        # a request with 100k of data but without content-length
        self.server.clear_log()
        r1 = p.request("get:'%s/p/200:r:b@100k:d102400'"%self.server.urlbase)
        assert r1.status_code == 200
        assert len(r1.content) > 100000
        assert self.server.last_log()

    def test_stream_multiple(self):
        p = self.pathoc()

        # simple request with streaming turned on
        self.server.clear_log()
        r1 = p.request("get:'%s/p/200'"%self.server.urlbase)
        assert r1.status_code == 200
        assert self.server.last_log()

        # now send back 100k of data, streamed but not chunked
        self.server.clear_log()
        r1 = p.request("get:'%s/p/200:b@100k'"%self.server.urlbase)
        assert r1.status_code == 200
        assert self.server.last_log()

    def test_stream_chunked(self):

        connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        connection.connect(("127.0.0.1", self.proxy.port))
        fconn = connection.makefile()
        spec = '200:h"Transfer-Encoding"="chunked":r:b"4\\r\\nthis\\r\\n7\\r\\nisatest\\r\\n0\\r\\n\\r\\n"'
        connection.send("GET %s/p/%s HTTP/1.1\r\n"%(self.server.urlbase, spec))
        connection.send("\r\n")

        httpversion, code, msg, headers, content = http.read_response(fconn, "GET", None, include_body=False)

        assert headers["Transfer-Encoding"][0] == 'chunked'
        assert code == 200

        chunks = list(content for _, content, _ in http.read_http_body_chunked(fconn, headers, None, "GET", 200, False))
        assert chunks == ["this", "isatest", ""]

        connection.close()


class MasterFakeResponse(tservers.TestMaster):
    def handle_request(self, m):
        resp = tutils.tresp()
        m.reply(resp)


class TestFakeResponse(tservers.HTTPProxTest):
    masterclass = MasterFakeResponse
    def test_fake(self):
        f = self.pathod("200")
        assert "header_response" in f.headers.keys()


class MasterKillRequest(tservers.TestMaster):
    def handle_request(self, m):
        m.reply(KILL)


class TestKillRequest(tservers.HTTPProxTest):
    masterclass = MasterKillRequest
    def test_kill(self):
        tutils.raises("server disconnect", self.pathod, "200")
        # Nothing should have hit the server
        assert not self.server.last_log()


class MasterKillResponse(tservers.TestMaster):
    def handle_response(self, m):
        m.reply(KILL)


class TestKillResponse(tservers.HTTPProxTest):
    masterclass = MasterKillResponse
    def test_kill(self):
        tutils.raises("server disconnect", self.pathod, "200")
        # The server should have seen a request
        assert self.server.last_log()


class EResolver(tservers.TResolver):
    def original_addr(self, sock):
        raise RuntimeError("Could not resolve original destination.")


class TestTransparentResolveError(tservers.TransparentProxTest):
    resolver = EResolver
    def test_resolve_error(self):
        assert self.pathod("304").status_code == 502


class MasterIncomplete(tservers.TestMaster):
    def handle_request(self, m):
        resp = tutils.tresp()
        resp.content = CONTENT_MISSING
        m.reply(resp)


class TestIncompleteResponse(tservers.HTTPProxTest):
    masterclass = MasterIncomplete
    def test_incomplete(self):
        assert self.pathod("200").status_code == 502


class TestCertForward(tservers.HTTPProxTest):
    certforward = True
    ssl = True
    def test_app_err(self):
        tutils.raises("handshake error", self.pathod, "200:b@100")