100 lines
3.4 KiB
Python
100 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
proxy.py
|
|
~~~~~~~~
|
|
⚡⚡⚡ Fast, Lightweight, Pluggable, TLS interception capable proxy server focused on
|
|
Network monitoring, controls & Application development, testing, debugging.
|
|
|
|
:copyright: (c) 2013-present by Abhinav Singh and contributors.
|
|
:license: BSD, see LICENSE for more details.
|
|
"""
|
|
import socket
|
|
|
|
from abc import ABC, abstractmethod
|
|
from uuid import UUID
|
|
from typing import Tuple, List, Union, Optional
|
|
|
|
from .parser import HttpParser
|
|
|
|
from ..common.flags import Flags
|
|
from ..common.types import Readables, Writables
|
|
from ..core.event import EventQueue
|
|
from ..core.connection import TcpClientConnection
|
|
|
|
|
|
class HttpProtocolHandlerPlugin(ABC):
|
|
"""Base HttpProtocolHandler Plugin class.
|
|
|
|
NOTE: This is an internal plugin and in most cases only useful for core contributors.
|
|
If you are looking for proxy server plugins see `<proxy.HttpProxyBasePlugin>`.
|
|
|
|
Implements various lifecycle events for an accepted client connection.
|
|
Following events are of interest:
|
|
|
|
1. Client Connection Accepted
|
|
A new plugin instance is created per accepted client connection.
|
|
Add your logic within __init__ constructor for any per connection setup.
|
|
2. Client Request Chunk Received
|
|
on_client_data is called for every chunk of data sent by the client.
|
|
3. Client Request Complete
|
|
on_request_complete is called once client request has completed.
|
|
4. Server Response Chunk Received
|
|
on_response_chunk is called for every chunk received from the server.
|
|
5. Client Connection Closed
|
|
Add your logic within `on_client_connection_close` for any per connection teardown.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
uid: UUID,
|
|
flags: Flags,
|
|
client: TcpClientConnection,
|
|
request: HttpParser,
|
|
event_queue: EventQueue):
|
|
self.uid: UUID = uid
|
|
self.flags: Flags = flags
|
|
self.client: TcpClientConnection = client
|
|
self.request: HttpParser = request
|
|
self.event_queue = event_queue
|
|
super().__init__()
|
|
|
|
def name(self) -> str:
|
|
"""A unique name for your plugin.
|
|
|
|
Defaults to name of the class. This helps plugin developers to directly
|
|
access a specific plugin by its name."""
|
|
return self.__class__.__name__
|
|
|
|
@abstractmethod
|
|
def get_descriptors(
|
|
self) -> Tuple[List[socket.socket], List[socket.socket]]:
|
|
return [], [] # pragma: no cover
|
|
|
|
@abstractmethod
|
|
def write_to_descriptors(self, w: Writables) -> bool:
|
|
return False # pragma: no cover
|
|
|
|
@abstractmethod
|
|
def read_from_descriptors(self, r: Readables) -> bool:
|
|
return False # pragma: no cover
|
|
|
|
@abstractmethod
|
|
def on_client_data(self, raw: memoryview) -> Optional[memoryview]:
|
|
return raw # pragma: no cover
|
|
|
|
@abstractmethod
|
|
def on_request_complete(self) -> Union[socket.socket, bool]:
|
|
"""Called right after client request parser has reached COMPLETE state."""
|
|
return False # pragma: no cover
|
|
|
|
@abstractmethod
|
|
def on_response_chunk(self, chunk: List[memoryview]) -> List[memoryview]:
|
|
"""Handle data chunks as received from the server.
|
|
|
|
Return optionally modified chunk to return back to client."""
|
|
return chunk # pragma: no cover
|
|
|
|
@abstractmethod
|
|
def on_client_connection_close(self) -> None:
|
|
pass # pragma: no cover
|