[tests] remove concept of feature_check - always test everything

Change-Id: Id2d0878263f41e38c2ce4ee57ac34f8f7724c71a

tests/pylt/base.py

@@ -93,7 +93,6 @@ class Env:
     COLOR_YELLOW: str = ''
     COLOR_RED: str = ''
     COLOR_CYAN: str = ''
-    fcgi_cgi: str = ''
     dir: str = ''
     defaultwww: str = ''
     log: io.TextIOBase = dataclasses.field(default_factory=io.StringIO)
@@ -183,8 +182,6 @@ class TestBase(metaclass=_TestBaseMeta):
     no_docroot = False
     vhostdir: str = ''
 
-    _active: bool  # false if feature_check failed (or failed on parent)
-
     @staticmethod
     def _vhostname(testname: str) -> str:
         return '.'.join(reversed(testname[1:-1].split('/'))).lower()
@@ -216,11 +213,7 @@ class TestBase(metaclass=_TestBaseMeta):
                 self.vhostdir = self._parent.vhostdir
             else:
                 self.vhostdir = os.path.join(self.tests.env.dir, 'www', 'vhosts', self.vhost)
-        if self.feature_check() and (not parent or parent._active):
-            self._active = True
         tests._add_test(self)
-        else:
-            self._active = False
 
     # internal methods, do not override
     def _prepare(self) -> None:
@@ -342,12 +335,6 @@ class TestBase(metaclass=_TestBaseMeta):
     def cleanup_test(self) -> None:
         pass
 
-    # return False is some dependency is missing
-    # TODO: should we even allow for that? better to fail,
-    # at least by default.
-    def feature_check(self) -> bool:
-        return True
-
 
 def class2testname(name) -> str:
     if name.startswith("Test"):

tests/pylt/fastcgi.py

@@ -0,0 +1,662 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import annotations
+
+import asyncio
+import dataclasses
+import enum
+import struct
+import typing
+
+
+class ProtocolException(Exception):
+    pass
+
+
+class Type(enum.IntEnum):
+    BEGIN_REQUEST = 1  # web server -> backend
+    ABORT_REQUEST = 2  # web server -> backend
+    END_REQUEST = 3  # backend -> web server (status)
+    PARAMS = 4  # web server -> backend (stream name-value pairs)
+    STDIN = 5  # web server -> backend (stream request body)
+    STDOUT = 6  # backend -> web server (stream response body)
+    STDERR = 7  # backend -> web server (stream error messages)
+    DATA = 8  # web server -> backend (stream additional data)
+    GET_VALUES = 9  # web server -> backend (request names-value pairs with empty values)
+    GET_VALUES_RESULT = 10  # backend -> web server (response name-value pairs)
+    UNKNOWN_TYPE = 11
+
+
+SERVER_TYPES = {
+    Type.BEGIN_REQUEST,
+    Type.ABORT_REQUEST,
+    Type.PARAMS,
+    Type.STDIN,
+    Type.DATA,
+    Type.GET_VALUES,
+}
+CLIENT_TYPES = {
+    Type.END_REQUEST,
+    Type.STDOUT,
+    Type.STDERR,
+    Type.GET_VALUES_RESULT,
+    Type.UNKNOWN_TYPE,
+}
+_NV_PAIR_LONG_LENGTH_BIT = 2**31
+
+
+class Role(enum.IntEnum):
+    RESPONDER = 1
+    AUTHORIZER = 2
+    FILTER = 3
+
+
+class ProtocolStatus(enum.IntEnum):
+    REQUEST_COMPLETE = 0
+    CANT_MPX_CONN = 1
+    OVERLOADED = 2
+    UNKNOWN_ROLE = 3
+
+
+@dataclasses.dataclass
+class Packet:
+    data: bytes
+    pckt_type: int
+    req_id: int
+
+    def unpack_server_message(self) -> ServerMessage:
+        unpack = _UNPACK_SERVER_MESSAGE.get(self.pckt_type, None)
+        if not unpack:
+            raise ProtocolException(f'Message type not allowed from server {self.pckt_type}')
+        return unpack(self.req_id, self.data)
+
+
+def _pair_encode_len(data: bytes) -> bytes:
+    data_len = len(data)
+    if data_len >= 128:
+        assert data_len < _NV_PAIR_LONG_LENGTH_BIT
+        return struct.pack('>I', data_len | _NV_PAIR_LONG_LENGTH_BIT)
+    else:
+        return struct.pack('>B', data_len)
+
+
+def _pair_decode_len(payload: bytes) -> typing.Tuple[int, bytes]:
+    if len(payload) == 0:
+        raise ProtocolException('Unexpected end of data; looking for pair name/value length')
+    data_len = payload[0]
+    if data_len >= 128:
+        if len(payload) < 4:
+            raise ProtocolException('Unexpected end of data; looking for pair name/value length')
+        data_len, = struct.unpack('>I', payload[:4])
+        return (data_len & ~_NV_PAIR_LONG_LENGTH_BIT, payload[4:])
+    else:
+        return (data_len, payload[1:])
+
+
+def pack_name_value_pairs(
+    pairs: typing.Iterable[typing.Tuple[bytes, bytes]],
+) -> bytes:
+    payload = b''
+    for name, value in pairs:
+        payload += _pair_encode_len(name) + _pair_encode_len(value) + name + value
+    return payload
+
+
+def unpack_name_value_pairs(
+    payload: bytes,
+) -> typing.Generator[typing.Tuple[bytes, bytes], None, None]:
+    while payload:
+        (name_len, payload) = _pair_decode_len(payload)
+        (value_len, payload) = _pair_decode_len(payload)
+        if len(payload) < name_len:
+            raise ProtocolException('Unexpected end of data; looking for pair name data')
+        name, payload = (payload[:name_len], payload[name_len:])
+        if len(payload) < value_len:
+            raise ProtocolException('Unexpected end of data; looking for pair value data')
+        value, payload = (payload[:value_len], payload[value_len:])
+        yield name, value
+
+
+@dataclasses.dataclass
+class MsgBeginRequest:
+    req_id: int  # must be > 0
+    role: Role = Role.RESPONDER
+    keep_alive: bool = False
+
+    def pack(self) -> Packet:
+        if self.req_id == 0:
+            raise ProtocolException(f'invalid BEGIN_REQUEST request id {self.req_id}')
+        flags = 0
+        if self.keep_alive:
+            flags |= 0x01
+        payload = struct.pack('>HBxxxxx', self.role.value, flags)
+        return Packet(data=payload, pckt_type=Type.BEGIN_REQUEST.value, req_id=self.req_id)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgBeginRequest:
+        if len(payload) != 8:
+            raise ProtocolException(f'invalid BEGIN_REQUEST payload {payload!r}')
+        if req_id == 0:
+            raise ProtocolException(f'invalid BEGIN_REQUEST request id {req_id}')
+        role_num, flags = struct.unpack('>HBxxxxx', payload)
+        try:
+            role = Role(role_num)
+        except ValueError:
+            raise ProtocolException(f'invalid BEGIN_REQUEST invalid role {role_num}')
+        keep_alive = 0 != (flags & 1)
+        return MsgBeginRequest(req_id=req_id, role=role, keep_alive=keep_alive)
+
+
+@dataclasses.dataclass
+class MsgAbortRequest:
+    req_id: int  # must be > 0
+
+    def pack(self) -> Packet:
+        if self.req_id == 0:
+            raise ProtocolException(f'invalid ABORT_REQUEST request id {self.req_id}')
+        return Packet(data=b'', pckt_type=Type.ABORT_REQUEST.value, req_id=self.req_id)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgAbortRequest:
+        if payload:
+            raise ProtocolException('non-empty ABORT_REQUEST')
+        return MsgAbortRequest(req_id=req_id)
+
+
+@dataclasses.dataclass
+class MsgEndRequest:
+    req_id: int  # must be > 0
+    app_status: int = 0
+    protocol_status: ProtocolStatus = ProtocolStatus.REQUEST_COMPLETE
+
+    def pack(self) -> Packet:
+        if self.req_id == 0:
+            raise ProtocolException(f'invalid END_REQUEST request id {self.req_id}')
+        payload = struct.pack('>IBxxx', self.app_status, self.protocol_status.value)
+        return Packet(data=payload, pckt_type=Type.END_REQUEST.value, req_id=self.req_id)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgEndRequest:
+        if len(payload) != 8:
+            raise ProtocolException(f'invalid END_REQUEST payload {payload!r}')
+        if req_id == 0:
+            raise ProtocolException(f'invalid END_REQUEST request id {req_id}')
+        app_status, protocol_status_num = struct.unpack('>IBxxx', payload)
+        try:
+            protocol_status = ProtocolStatus(protocol_status_num)
+        except ValueError:
+            raise ProtocolException(f'invalid END_REQUEST invalid protocol status {protocol_status_num}')
+        return MsgEndRequest(req_id=req_id, app_status=app_status, protocol_status=protocol_status)
+
+
+@dataclasses.dataclass
+class _MsgStream:
+    req_id: int  # must be > 0
+    payload: bytes
+
+
+class MsgParams(_MsgStream):
+    def pack(self) -> Packet:
+        if self.req_id == 0:
+            raise ProtocolException(f'invalid PARAMS request id {self.req_id}')
+        return Packet(data=self.payload, pckt_type=Type.PARAMS.value, req_id=self.req_id)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgParams:
+        if req_id == 0:
+            raise ProtocolException(f'invalid PARAMS request id {req_id}')
+        return MsgParams(req_id=req_id, payload=payload)
+
+
+class MsgStdin(_MsgStream):
+    def pack(self) -> Packet:
+        if self.req_id == 0:
+            raise ProtocolException(f'invalid STDIN request id {self.req_id}')
+        return Packet(data=self.payload, pckt_type=Type.STDIN.value, req_id=self.req_id)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgStdin:
+        if req_id == 0:
+            raise ProtocolException(f'invalid STDIN request id {req_id}')
+        return MsgStdin(req_id=req_id, payload=payload)
+
+
+class MsgStdout(_MsgStream):
+    def pack(self) -> Packet:
+        if self.req_id == 0:
+            raise ProtocolException(f'invalid STDOUT request id {self.req_id}')
+        return Packet(data=self.payload, pckt_type=Type.STDOUT.value, req_id=self.req_id)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgStdout:
+        if req_id == 0:
+            raise ProtocolException(f'invalid STDOUT request id {req_id}')
+        return MsgStdout(req_id=req_id, payload=payload)
+
+
+class MsgStderr(_MsgStream):
+    def pack(self) -> Packet:
+        if self.req_id == 0:
+            raise ProtocolException(f'invalid STDERR request id {self.req_id}')
+        return Packet(data=self.payload, pckt_type=Type.STDERR.value, req_id=self.req_id)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgStderr:
+        if req_id == 0:
+            raise ProtocolException(f'invalid STDERR request id {req_id}')
+        return MsgStderr(req_id=req_id, payload=payload)
+
+
+class MsgData(_MsgStream):
+    def pack(self) -> Packet:
+        if self.req_id == 0:
+            raise ProtocolException(f'invalid DATA request id {self.req_id}')
+        return Packet(data=self.payload, pckt_type=Type.DATA.value, req_id=self.req_id)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgData:
+        if req_id == 0:
+            raise ProtocolException(f'invalid DATA request id {req_id}')
+        return MsgData(req_id=req_id, payload=payload)
+
+
+@dataclasses.dataclass
+class MsgGetValues:
+    names: set[bytes]
+
+    def pack(self) -> Packet:
+        payload = pack_name_value_pairs((name, b'') for name in self.names)
+        return Packet(data=payload, pckt_type=Type.GET_VALUES.value, req_id=0)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgGetValues:
+        if req_id != 0:
+            raise ProtocolException(f'invalid GET_VALUES request id {req_id}')
+        names: set[bytes] = set()
+        for name, value in unpack_name_value_pairs(payload):
+            if value:
+                raise ProtocolException(f'non-empty value {value!r} in GET_VALUES pair for name {name!r}')
+            names.add(name)
+        return MsgGetValues(names=names)
+
+
+@dataclasses.dataclass
+class MsgGetValuesResult:
+    values: dict[bytes, bytes]
+
+    def pack(self) -> Packet:
+        payload = pack_name_value_pairs(self.values.items())
+        return Packet(data=payload, pckt_type=Type.GET_VALUES_RESULT.value, req_id=0)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgGetValuesResult:
+        if req_id != 0:
+            raise ProtocolException(f'invalid GET_VALUES_RESULT request id {req_id}')
+        values = dict(unpack_name_value_pairs(payload))
+        return MsgGetValuesResult(values=values)
+
+
+@dataclasses.dataclass
+class MsgUnknownType:
+    pckt_type: int
+
+    def pack(self) -> Packet:
+        payload = struct.pack('>Bxxxxxxx', self.pckt_type)
+        return Packet(data=payload, pckt_type=Type.UNKNOWN_TYPE.value, req_id=0)
+
+    @staticmethod
+    def unpack(req_id: int, payload: bytes) -> MsgUnknownType:
+        if len(payload) != 8:
+            raise ProtocolException(f'invalid UNKNOWN_TYPE payload {payload!r}')
+        if req_id != 0:
+            raise ProtocolException(f'invalid UNKNOWN_TYPE request id {req_id}')
+        pckt_type, = struct.unpack('>Bxxxxxxx', payload)
+        return MsgUnknownType(pckt_type=pckt_type)
+
+
+ServerRequestMessage = typing.Union[
+    MsgBeginRequest,
+    MsgAbortRequest,
+    MsgParams,
+    MsgStdin,
+    MsgData,
+]
+ServerManagementMessage = MsgGetValues  # just one for now
+ServerMessage = typing.Union[ServerRequestMessage, ServerManagementMessage]
+ClientRequestMessage = typing.Union[
+    MsgEndRequest,
+    MsgStdout,
+    MsgStderr,
+]
+ClientManagementMessage = typing.Union[
+    MsgGetValuesResult,
+    MsgUnknownType,
+]
+ClientMessage = typing.Union[ClientRequestMessage, ClientManagementMessage]
+_UNPACK_SERVER_MESSAGE: dict[int, typing.Callable[[int, bytes], ServerMessage]] = {
+    Type.BEGIN_REQUEST.value: MsgBeginRequest.unpack,
+    Type.ABORT_REQUEST.value: MsgAbortRequest.unpack,
+    Type.PARAMS.value: MsgParams.unpack,
+    Type.STDIN.value: MsgStdin.unpack,
+    Type.DATA.value: MsgData.unpack,
+    Type.GET_VALUES.value: MsgGetValues.unpack,
+}
+_UNPACK_CLIENT_MESSAGE: dict[int, typing.Callable[[int, bytes], ClientMessage]] = {
+    Type.END_REQUEST.value: MsgEndRequest.unpack,
+    Type.STDOUT.value: MsgStdout.unpack,
+    Type.STDERR.value: MsgStderr.unpack,
+    Type.GET_VALUES_RESULT.value: MsgGetValuesResult.unpack,
+    Type.UNKNOWN_TYPE.value: MsgUnknownType.unpack,
+}
+
+
+class LowLevelConnection:
+    def __init__(self, reader: asyncio.StreamReader, writer: asyncio.StreamWriter) -> None:
+        self._reader = reader
+        self._writer = writer
+        self._closed = False
+        self._write_lock = asyncio.Lock()
+
+    def close(self) -> None:
+        if not self._closed:
+            self._closed = True
+            self._writer.close()
+
+    def _abort(self, msg: str) -> typing.NoReturn:
+        self.close()
+        raise ProtocolException(msg)
+
+    def _error_close(self) -> typing.NoReturn:
+        self.close()
+        raise EOFError("FastCGI connection is closed")
+
+    async def read(self) -> Packet:
+        if self._closed:
+            self._error_close()
+
+        try:
+            hdr = await self._reader.readexactly(8)
+        except asyncio.IncompleteReadError as e:
+            if e.partial:
+                self._abort("Incomplete header")
+            self._error_close()
+        except (EOFError, ConnectionError):
+            self._error_close()
+
+        version, pckt_type, req_id, data_len, pad_len = struct.unpack('>BBHHBx', hdr)
+        if version != 1:
+            self._abort(f"Invalid packet version {version}")
+        if pad_len >= 8 or (data_len + pad_len) % 8 != 0:
+            self._abort(f"Invalid packet pad_len (data_len = {data_len}, pad_len = {pad_len})")
+        total = data_len + pad_len
+        try:
+            data = await self._reader.readexactly(total)
+        except EOFError:
+            self._abort("Incomplete data")
+        return Packet(data=data[:data_len], pckt_type=pckt_type, req_id=req_id)
+
+    async def write(self, packet: Packet):
+        async with self._write_lock:
+            if self._closed:
+                self._error_close()
+            version = 1
+            data_len = len(packet.data)
+            pad_len = (8 - (data_len % 8)) % 8
+            padding = b'       '[:pad_len]
+            hdr = struct.pack('>BBHHBx', version, packet.pckt_type, packet.req_id, data_len, pad_len)
+            self._writer.writelines((hdr, packet.data, padding))
+            try:
+                await self._writer.drain()
+            except ConnectionError as e:
+                self._abort(f"Connection reset: {e}")
+
+
+ApplicationRequestT = typing.TypeVar('ApplicationRequestT', bound='ApplicationRequest')
+
+
+class Application(typing.Generic[ApplicationRequestT]):
+    def __init__(
+        self,
+        *,
+        reader: asyncio.StreamReader,
+        writer: asyncio.StreamWriter,
+        request_cls: type[ApplicationRequestT],
+    ) -> None:
+        self._lower = LowLevelConnection(reader=reader, writer=writer)
+        self._request_cls = request_cls
+        self._requests: dict[int, ApplicationRequestT] = {}
+        self._msg_handlers = {
+            Type.BEGIN_REQUEST.value: self._handle_begin_request,
+            Type.ABORT_REQUEST.value: self._handle_abort_request,
+            Type.PARAMS.value: self._handle_params,
+            Type.STDIN.value: self._handle_stdin,
+            Type.DATA.value: self._handle_data,
+            Type.GET_VALUES.value: self._handle_get_values,
+        }
+        self._values: dict[bytes, bytes] = {}
+
+    def _close(self) -> None:
+        self._lower.close()
+        requests = list(self._requests.values())
+        self._requests.clear()
+        for req in requests:
+            req._app = None
+        for req in requests:
+            req._recv_task.cancel()
+
+    async def _handle_begin_request(self, packet: Packet) -> None:
+        msg = MsgBeginRequest.unpack(packet.req_id, packet.data)
+        if msg.req_id in self._requests:
+            raise ProtocolException(f'Request id {msg.req_id} still in use')
+        self._requests[msg.req_id] = req = self._request_cls(
+            req_id=msg.req_id,
+            keep_alive=msg.keep_alive,
+        )
+        req._app = self
+
+    async def _handle_abort_request(self, packet: Packet) -> None:
+        msg = MsgAbortRequest.unpack(packet.req_id, packet.data)
+        req = self._requests.get(msg.req_id, None)
+        if req:
+            # protocol spec: ignore messages for unknown request ids
+            await req._recv_queue.put(msg)
+
+    async def _handle_params(self, packet: Packet) -> None:
+        msg = MsgParams.unpack(packet.req_id, packet.data)
+        req = self._requests.get(msg.req_id, None)
+        if req:
+            # protocol spec: ignore messages for unknown request ids
+            await req._recv_queue.put(msg)
+
+    async def _handle_stdin(self, packet: Packet) -> None:
+        msg = MsgStdin.unpack(packet.req_id, packet.data)
+        req = self._requests.get(msg.req_id, None)
+        if req:
+            # protocol spec: ignore messages for unknown request ids
+            await req._recv_queue.put(msg)
+
+    async def _handle_data(self, packet: Packet) -> None:
+        msg = MsgData.unpack(packet.req_id, packet.data)
+        req = self._requests.get(msg.req_id, None)
+        if req:
+            # protocol spec: ignore messages for unknown request ids
+            await req._recv_queue.put(msg)
+
+    async def _handle_get_values(self, packet: Packet) -> None:
+        msg = MsgGetValues.unpack(packet.req_id, packet.data)
+        values: dict[bytes, bytes] = {}
+        for name in msg.names:
+            value = self._values.get(name, None)
+            if not value is None:
+                values[name] = value
+        await self._write(MsgGetValuesResult(values=values))
+
+    async def _write(self, msg: ClientMessage) -> None:
+        await self._lower.write(msg.pack())
+
+    async def run(self) -> None:
+        try:
+            while True:
+                try:
+                    packet = await self._lower.read()
+                except (ProtocolException, EOFError):
+                    return
+
+                try:
+                    Type(packet.pckt_type)
+                except ValueError:
+                    await self._write(MsgUnknownType(pckt_type=packet.pckt_type))
+                    continue
+
+                handler = self._msg_handlers.get(packet.pckt_type, None)
+                if not handler:
+                    return
+
+                await handler(packet)
+        finally:
+            self._close()
+
+
+class ApplicationRequest:
+    def __init__(self, *, req_id: int, keep_alive: bool) -> None:
+        self._app: typing.Optional[Application] = None
+        self.req_id = req_id
+        self.keep_alive = keep_alive
+        self.params: dict[bytes, bytes] = {}
+        self._params_buf = b''
+        self.params_complete = False
+        self.stdin_closed = False
+        self.data_closed = False
+        self.stdout_closed = False
+        self.stderr_closed = False
+        self.aborted = False
+        self.completed = False
+        self._recv_queue: asyncio.Queue[typing.Union[
+            MsgAbortRequest,
+            MsgParams,
+            MsgStdin,
+            MsgData,
+        ]] = asyncio.Queue(maxsize=16)
+        self._recv_task = asyncio.Task(self._start())
+
+    async def _start(self) -> None:
+        try:
+            await self.run()
+        finally:
+            if not self.completed:
+                await self._handle_abort()
+
+    async def run(self) -> None:
+        while True:
+            item = await self._recv_queue.get()
+            if isinstance(item, MsgAbortRequest):
+                await self._handle_abort()
+            elif isinstance(item, MsgParams):
+                await self._recv_params_stream(item.payload)
+            elif isinstance(item, MsgStdin):
+                await self._recv_stdin_stream(item.payload)
+            # elif isinstance(item, MsgData):
+            else:
+                await self._recv_data_stream(item.payload)
+
+    async def exit(
+        self,
+        *,
+        status: int = 0,
+        protocol_status: ProtocolStatus = ProtocolStatus.REQUEST_COMPLETE,
+    ) -> None:
+        self.stdout_closed = self.stderr_closed = True
+        if self._app:
+            app = self._app
+            self._app = None
+            del app._requests[self.req_id]
+            await app._write(
+                MsgEndRequest(req_id=self.req_id, app_status=status, protocol_status=protocol_status),
+            )
+        self._recv_task.cancel()
+        while True:
+            try:
+                self._recv_queue.get_nowait()
+            except asyncio.QueueEmpty:
+                break
+
+    async def finish(
+        self,
+        *,
+        status: int = 0,
+        protocol_status: ProtocolStatus = ProtocolStatus.REQUEST_COMPLETE,
+    ) -> None:
+        await self.write_stdout(b'')
+        await self.write_stderr(b'')
+        self.completed = True
+        await self.exit(status=status, protocol_status=protocol_status)
+
+    async def write_stdout(self, data: bytes, *, no_close: bool = False):
+        if self.stdout_closed:
+            if len(data) != 0:
+                raise Exception('stdout already closed')
+        if len(data) == 0:
+            if not no_close:
+                # sending empty data signals EOF by default
+                self.stdout_closed = True
+            else:
+                return  # don't send the EOF message!
+        if self._app:
+            await self._app._write(MsgStdout(req_id=self.req_id, payload=data))
+
+    async def write_stderr(self, data: bytes, *, no_close: bool = False):
+        if self.stderr_closed:
+            if len(data) != 0:
+                raise Exception('stderr already closed')
+        if len(data) == 0:
+            if not no_close:
+                # sending empty data signals EOF by default
+                self.stderr_closed = True
+            else:
+                return  # don't send the EOF message!
+        if self._app:
+            await self._app._write(MsgStderr(req_id=self.req_id, payload=data))
+
+    async def _handle_abort(self) -> None:
+        if self.completed:
+            return
+        if not self.aborted:
+            self.aborted = True
+            await self.handle_abort()
+
+    async def handle_abort(self) -> None:
+        await self.exit(status=-1)
+
+    async def _recv_params_stream(self, data: bytes) -> None:
+        if self.params_complete:
+            raise ProtocolException('Params already closed')
+        if len(data) == 0:
+            self.params_complete = True
+            self.params.update(unpack_name_value_pairs(self._params_buf))
+            self._params_buf = b''
+            await self.received_params()
+        else:
+            self._params_buf += data
+
+    async def received_params(self) -> None:
+        pass
+
+    async def _recv_stdin_stream(self, data: bytes) -> None:
+        if not self.params_complete:
+            raise ProtocolException('Received stdin data before params finished')
+        if len(data) == 0:
+            self._stdin_closed = True
+        await self.recv_stdin(data)
+
+    async def recv_stdin(self, data: bytes) -> None:
+        # ignored by default
+        pass
+
+    async def _recv_data_stream(self, data: bytes) -> None:
+        if len(data) == 0:
+            self._data_closed = True
+        await self.recv_data(data)
+
+    async def recv_data(self, data: bytes) -> None:
+        # ignored by default
+        pass

tests/pylt/run.py

@@ -173,8 +173,6 @@ def setup_env() -> Env:
     env.COLOR_RED = env.color and "\033[1;31m" or ""
     env.COLOR_CYAN = env.color and "\033[1;36m" or ""
 
-    env.fcgi_cgi = which('fcgi-cgi') or ''
-
     env.dir = mkdtemp(suffix='-l2-tests')
     env.defaultwww = os.path.join(env.dir, "www", "default")
 

tests/pylt/tests/t-cgi.py

@@ -1,11 +1,13 @@
 # -*- coding: utf-8 -*-
 
 from io import BytesIO
-import time
 import hashlib
+import os
+import time
+
 import pycurl
 
-from pylt.base import ModuleTest
+from pylt.base import ModuleTest, Tests
 from pylt.requests import CurlRequest
 from pylt.service import FastCGI
 
@@ -22,9 +24,9 @@ def generate_body(seed: str, size: int) -> bytes:
 class CGI(FastCGI):
     name = "fcgi_cgi"
 
-    def prepare_service(self) -> None:
-        self.binary = [self.tests.env.fcgi_cgi]
-        super().prepare_service()
+    def __init__(self, *, tests: Tests) -> None:
+        super().__init__(tests=tests)
+        self.binary = [os.path.join(self.tests.env.sourcedir, "tests", "run-fcgi-cgi.py")]
 
 
 SCRIPT_ENVCHECK = r"""#!/bin/sh
@@ -188,9 +190,8 @@ if phys.exists and phys.path =$ ".cgi" {
 
 """
 
-    def feature_check(self) -> bool:
-        if self.tests.env.fcgi_cgi is None:
-            return self.MissingFeature('fcgi-cgi')
+    def __init__(self, *, tests: Tests) -> None:
+        super().__init__(tests=tests)
         cgi = CGI(tests=self.tests)
         self.plain_config = f"""
 setup {{ module_load "mod_fastcgi"; }}
@@ -199,9 +200,7 @@ cgi = {{
     fastcgi "unix:{cgi.sockfile}";
 }};
 """
-
         self.tests.add_service(cgi)
-        return True
 
     def prepare_test(self) -> None:
         self.prepare_vhost_file("envcheck.cgi", SCRIPT_ENVCHECK, mode=0o755)

tests/pylt/tests/t-memcached.py

@@ -60,7 +60,9 @@ class Test(base.ModuleTest):
 memcache;
 """
 
-    def feature_check(self) -> bool:
+    def __init__(self, *, tests: base.Tests) -> None:
+        super().__init__(tests=tests)
+
         memcached = Memcached(tests=self.tests)
         self.plain_config = f"""
 setup {{ module_load "mod_memcached"; }}
@@ -75,6 +77,4 @@ memcache = {{
         }});
 }};
 """
-
         self.tests.add_service(memcached)
-        return True

tests/pylt/tests/t-scgi.py

@@ -51,7 +51,9 @@ class Test(base.ModuleTest):
 run_scgi;
 """
 
-    def feature_check(self) -> bool:
+    def __init__(self, *, tests: base.Tests) -> None:
+        super().__init__(tests=tests)
+
         scgi = SCGI(tests=self.tests)
         self.plain_config = f"""
 setup {{ module_load "mod_scgi"; }}
@@ -60,6 +62,4 @@ run_scgi = {{
     core.wsgi ( "/scgi", {{ scgi "unix:{scgi.sockfile}"; }} );
 }};
 """
-
         self.tests.add_service(scgi)
-        return True

tests/run-fcgi-cgi.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import asyncio
+import os
+import socket
+import sys
+import typing
+
+sys.path.append(os.path.dirname(__file__))
+
+import pylt.fastcgi
+
+
+class TestAppRequest(pylt.fastcgi.ApplicationRequest):
+    def __init__(self, *, req_id: int, keep_alive: bool) -> None:
+        super().__init__(req_id=req_id, keep_alive=keep_alive)
+        self._process: typing.Optional[asyncio.subprocess.Process] = None
+        self._task_stdout: typing.Optional[asyncio.Task] = None
+        self._task_stderr: typing.Optional[asyncio.Task] = None
+        self._task_wait: typing.Optional[asyncio.Task] = None
+
+    async def received_params(self) -> None:
+        target = self.params.get(b'INTERPRETER') or self.params.get(b'SCRIPT_FILENAME')
+        if not target:
+            await self.write_stdout(b"Status: 500\r\nContent-Type: text/plain\r\n\r\n")
+            await self.finish()
+            return
+        env = dict(self.params)
+        env[b'PATH'] = os.getenvb(b'PATH', b'')
+        self._process = process = await asyncio.create_subprocess_exec(
+            target,
+            stdin=asyncio.subprocess.PIPE,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE,
+            env=env,
+        )
+        self._task_stdout = asyncio.Task(self._handle_task_stdout(process))
+        self._task_stderr = asyncio.Task(self._handle_task_stderr(process))
+        self._task_wait = asyncio.Task(self._handle_task_wait(process))
+
+    async def recv_stdin(self, data: bytes) -> None:
+        if not self._process or not self._process.stdin:
+            return
+        try:
+            if data:
+                self._process.stdin.write(data)
+                await self._process.stdin.drain()
+            else:
+                self._process.stdin.close()
+                await self._process.stdin.wait_closed()
+        except IOError:
+            stdin = self._process.stdin
+            self._process.stdin = None
+            try:
+                stdin.close()
+            except IOError:
+                pass
+
+    async def _handle_task_stdout(self, process: asyncio.subprocess.Process):
+        stdout = process.stdout
+        try:
+            if not stdout:
+                return
+            while True:
+                try:
+                    chunk = await stdout.read(8192)
+                    if not chunk:
+                        return
+                    await self.write_stdout(chunk)
+                except EOFError:
+                    return
+        finally:
+            await self.write_stdout(b'')
+
+    async def _handle_task_stderr(self, process: asyncio.subprocess.Process):
+        stderr = process.stderr
+        try:
+            if not stderr:
+                return
+            while True:
+                try:
+                    chunk = await stderr.read(8192)
+                    if not chunk:
+                        return
+                    await self.write_stderr(chunk)
+                except EOFError:
+                    return
+        finally:
+            await self.write_stderr(b'')
+
+    async def _handle_task_wait(self, process: asyncio.subprocess.Process):
+        status = await process.wait()
+        assert self._task_stdout
+        await self._task_stdout
+        assert self._task_stderr
+        await self._task_stderr
+        self._process = None
+        await self.finish(status=status)
+
+
+async def handle_fcgi_cgi(reader: asyncio.StreamReader, writer: asyncio.StreamWriter) -> None:
+    print("fcgi-cgi: Incoming connection", flush=True)
+    app = pylt.fastcgi.Application(reader=reader, writer=writer, request_cls=TestAppRequest)
+    await app.run()
+
+
+async def main() -> None:
+    sock = socket.socket(fileno=0)
+
+    if sock.type == socket.AF_UNIX:
+        server = await asyncio.start_unix_server(handle_fcgi_cgi, sock=sock, start_serving=False)
+    else:
+        server = await asyncio.start_server(handle_fcgi_cgi, sock=sock, start_serving=False)
+
+    addr = server.sockets[0].getsockname()
+    print(f'Serving on {addr}', flush=True)
+
+    async with server:
+        await server.serve_forever()
+
+
+try:
+    asyncio.run(main())
+except KeyboardInterrupt:
+    pass