From a548d8fc91f96ab18ee7804a6c960b57244f62d9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Nils=20B=C3=BCchner?= Date: Fri, 13 Sep 2024 13:23:05 +0200 Subject: [PATCH] iniital --- .gitignore | 11 + LICENSE | 661 +++++++++++++++++++++++++++++++++++++++++++++++ README.md | 81 ++++++ base-config.yaml | 11 + maubot.yaml | 13 + nsfwbot.py | 243 +++++++++++++++++ requirements.txt | 3 + 7 files changed, 1023 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 base-config.yaml create mode 100644 maubot.yaml create mode 100644 nsfwbot.py create mode 100644 requirements.txt diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ce38e99 --- /dev/null +++ b/.gitignore @@ -0,0 +1,11 @@ +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] +*$py.class + +# C extensions +*.so +*.mbp + +venv + diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..0ad25db --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..4a5689e --- /dev/null +++ b/README.md @@ -0,0 +1,81 @@ +# nsfwbot for Matrix + +`nsfwbot` is a Matrix bot plugin that attempts to detect NSFW (Not Safe For Work) images posted in +Matrix chat rooms. It uses [nsfwdetection](https://github.com/gsarridis/NSFW-Detection-Pytorch), +which includes a small model that can run without a GPU with low resource requirements. + +## Features + +- **Image Analysis**: Detects and analyses images posted in Matrix chats. +- **Text Message Parsing**: Analyses images embedded in text messages. +- **Configurable Concurrency**: Controls concurrent image processing tasks. +- **Custom Actions**: Configurable actions for detected content, including reporting and redacting messages. + +## Requirements + +- **Maubot**: Runs within the Maubot framework. +- **Python Dependencies**: `nsfwdetection` and `beautifulsoup4`. + > **Note**: `nsfwdetection` will not run on Alpine Linux. This means the default Maubot Docker + > image will not work. I have built a custom Debian-based Maubot in the + > `ghcr.io/tcpipuk/maubot:debian` Docker image. + +## Installation + +1. **Use the Custom Maubot Docker Image**: + Replace the official Maubot image with a custom Debian-based image: + + ```bash + docker pull ghcr.io/tcpipuk/maubot:debian + ``` + +2. a. **Install pre-prepared plugin from [repository releases](https://github.com/tcpipuk/matrix-nsfwbot/releases)** + + b. **Clone the Repository**: + + ```bash + git clone https://github.com/tcpipuk/matrix-nsfwbot + ``` + + Zip the plugin files and upload through the Maubot admin interface. Ensure the plugin is + configured and enabled. + +3. **Configure the Plugin**: + See configuration section below for a summary of settings in the Maubot UI. + +## Configuration + +Edit `base-config.yaml` to set: + +- `max_concurrent_jobs`: Number of concurrent jobs to allow. +- `via_servers`: List of servers for `matrix.to` URLs. +- `actions`: + - `ignore_sfw`: Ignore SFW images (default: `true`). + - `redact_nsfw`: Redact NSFW messages (default: `false`). + - `direct_reply`: Reply directly in the same room (default: `false`). + - `report_to_room`: Room ID for reporting (not enabled by default). + > **Note**: This can be a room alias (like `#room:server`) but this is far less efficient, + as the bot will need to find the room ID (like `!room:server`) to send messages. + +## Usage + +Once installed and configured, `nsfwbot` will automatically analyse images posted in the chat and +reply with a classification result, e.g. + +```markdown +mxc://matrix.org/abcd1234 in https://matrix.to/#/!roomid:matrix.org/$eventid?via=matrix.org appears NSFW with score 87.93% +``` + +If multiple images are detected in a text message: + +```markdown +- mxc://matrix.org/abcd1234 in https://matrix.to/#/!roomid:matrix.org/$eventid?via=matrix.org appears SFW with score 2.45% +- mxc://matrix.org/efgh5678 in https://matrix.to/#/!roomid:matrix.org/$eventid?via=matrix.org appears NSFW with score 94.82% +``` + +## Contributing + +Contributions are welcome! Open an issue or submit a pull request on GitHub. + +## License + +This project is licensed under the AGPLv3 License. See the [LICENSE](LICENSE) file for details. diff --git a/base-config.yaml b/base-config.yaml new file mode 100644 index 0000000..eec06a8 --- /dev/null +++ b/base-config.yaml @@ -0,0 +1,11 @@ +# All actions are true/false, except report_to_room +# which should be the room ID in single quotes of the +# desired room, e.g. '!room:myserver.local' +max_concurrent_jobs: 3 +via_servers: +- xentonix.net +actions: + ignore_sfw: true + redact_nsfw: true + direct_reply: false + report_to_room: '!IjQCvkupmkUHbNzBRx:xentonix.net' diff --git a/maubot.yaml b/maubot.yaml new file mode 100644 index 0000000..af9494f --- /dev/null +++ b/maubot.yaml @@ -0,0 +1,13 @@ +maubot: 0.1.0 +id: uk.tcpip.nsfwbot +version: 0.2.4 +license: AGPL-3.0-or-later +modules: + - nsfwbot +main_class: NSFWModelPlugin +config: true +extra_files: + - base-config.yaml +dependencies: + - beautifulsoup4 + - nsfwdetection diff --git a/nsfwbot.py b/nsfwbot.py new file mode 100644 index 0000000..ab89786 --- /dev/null +++ b/nsfwbot.py @@ -0,0 +1,243 @@ +import os +import time +from collections import defaultdict +from maubot import Plugin +from nudenet import NudeDetector +from uuid import uuid4 +from typing import List, Type, Tuple +from asyncio import Semaphore +from mautrix.util.config import BaseProxyConfig, ConfigUpdateHelper +from mautrix.types import ( + MessageEvent, MessageType, RoomAlias, RoomID, EventID, TextMessageEventContent, MediaMessageEventContent +) +from mautrix.errors import MBadJSON, MForbidden +from maubot.handlers import command, event +#from bs4 import BeautifulSoup + + +# Initialize NudeDetector +detector = NudeDetector() + +block_labels = [ + "FEMALE_GENITALIA_COVERED", + "BUTTOCKS_EXPOSED", + "FEMALE_BREAST_EXPOSED", + "FEMALE_GENITALIA_EXPOSED", + "ANUS_EXPOSED", + "MALE_GENITALIA_EXPOSED", + "ANUS_COVERED", + "BUTTOCKS_COVERED", +] + +class Config(BaseProxyConfig): + """ + Configuration manager for the NSFWModelPlugin. + """ + def do_update(self, helper: ConfigUpdateHelper) -> None: + helper.copy("max_concurrent_jobs") + helper.copy("via_servers") + helper.copy("actions") + + +class NSFWModelPlugin(Plugin): + semaphore = Semaphore(1) + via_servers = [] + actions = {} + report_to_room = "" + + # Track images sent by each user + user_image_data = defaultdict(list) # {user_id: [(timestamp, event_id)]} + max_images = 3 # Max number of images + time_window = 60 * 1 # Time window in seconds (e.g., 5 minutes) + + @classmethod + def get_config_class(cls) -> Type[BaseProxyConfig]: + return Config + + async def start(self) -> None: + await super().start() + try: + if not isinstance(self.config, Config): + self.log.error("Plugin not yet configured.") + else: + self.config.load_and_update() + self.via_servers = self.config["via_servers"] + self.actions = self.config["actions"] + max_concurrent_jobs = self.config["max_concurrent_jobs"] + self.semaphore = Semaphore(max_concurrent_jobs) + self.report_to_room = str(self.actions.get("report_to_room", "")) + if self.report_to_room.startswith("#"): + report_to_info = await self.client.resolve_room_alias(RoomAlias(self.report_to_room)) + self.report_to_room = report_to_info.room_id + elif self.report_to_room and not self.report_to_room.startswith("!"): + self.log.warning("Invalid room ID or alias provided for report_to_room") + self.log.info("Loaded nsfwbot successfully") + except Exception as e: + self.log.error(f"Error during start: {e}") + + @command.passive( + "^mxc://.+/.+$", + field=lambda evt: evt.content.url or "", # type:ignore + msgtypes=(MessageType.IMAGE,), + ) + async def handle_image_message(self, evt: MessageEvent, url: Tuple[str]) -> None: + """ + Handle direct image messages with rate limiting and redact previous images. + """ + user_id = evt.sender # The user who sent the image + current_time = time.time() + + # Clean up old entries that are outside of the time window + self.user_image_data[user_id] = [ + (timestamp, event_id) for (timestamp, event_id) in self.user_image_data[user_id] + if current_time - timestamp <= self.time_window + ] + + # Check if user exceeded the image limit + if len(self.user_image_data[user_id]) >= self.max_images: + # Redact all images sent within the time window + for _, event_id in self.user_image_data[user_id]: + try: + await self.client.redact(evt.room_id, event_id, reason="Too many images sent in a short period") + self.log.info(f"Redacted image sent by {user_id} (event ID: {event_id}) due to rate limit.") + except Exception as e: + self.log.error(f"Failed to redact image (event ID: {event_id}): {e}") + + # Also redact the current image + await self.client.redact(evt.room_id, evt.event_id, reason="Too many images sent in a short period") + self.log.warning(f"User {user_id} exceeded the image limit. Current image redacted.") + return + + # Add current timestamp and event ID + self.user_image_data[user_id].append((current_time, evt.event_id)) + + try: + if not isinstance(evt.content, MediaMessageEventContent) or not evt.content.url: + return + results = await self.process_images([evt.content.url]) + matrix_to_url = self.create_matrix_to_url(evt.room_id, evt.event_id) + response = self.format_response(results, matrix_to_url) + await self.send_responses(evt, response, results) + except Exception as e: + self.log.error(f"Error handling image message: {e}") + + + async def process_images(self, mxc_urls: List[str]) -> dict: + """ + Download and process the images using the NudeNet detector. + + :param mxc_urls: List of MXC URLs of the images. + :return: Dictionary of results with MXC URLs as keys and detection results as values. + """ + async with self.semaphore: + temp_files = [] + try: + # Download and temporarily save the images + for mxc_url in mxc_urls: + img_bytes = await self.client.download_media(mxc_url) # Download image from MXC URL + temp_filename = f"/tmp/{uuid4()}.jpg" + with open(temp_filename, "wb") as img_file: + img_file.write(img_bytes) + temp_files.append((mxc_url, temp_filename)) + + # Process images using NudeNet + results = {} + for mxc_url, temp_filename in temp_files: + detection_result = detector.detect(temp_filename) # Detect NSFW content with bounding boxes + results[mxc_url] = detection_result + + return results + + except Exception as e: + self.log.error(f"Error processing images: {e}") + return {} + finally: + # Clean up temporary files + for _, temp_filename in temp_files: + os.remove(temp_filename) + + def format_response(self, results: dict, matrix_to_url: str) -> str: + """ + Format the response message based on the results. + + :param results: Dictionary of results with MXC URLs as keys and detection results as values. + :param matrix_to_url: The matrix.to URL for the original message. + :return: The formatted response message. + """ + response_parts = [] + for mxc_url, detections in results.items(): + for detection in detections: + if detection['class'] in block_labels: + detection_info = ( + f"{mxc_url} contains {detection['class']} " + f"with a score of {detection['score']:.2f} " + f"in {matrix_to_url}" + ) + response_parts.append(detection_info) + break + + return "\n".join(response_parts) + + async def send_responses(self, evt: MessageEvent, response: str, results: dict) -> None: + """ + Send responses or take actions based on config. + + :param evt: The message event. + :param response: The formatted response message. + :param results: Dictionary of results with MXC URLs as keys and detection results as values. + """ + + try: + ignore_sfw = self.actions.get("ignore_sfw", False) + nsfw_results = [res for res in results.values() if any(d['class'] != 'SFW' for d in res)] + detected = 0 + for mxc_url, detections in results.items(): + for detection in detections: + if detection['class'] in block_labels: + detected = 1 + self.log.info(f"{mxc_url} is NSFW because {detection['class']} is blocked") + if detected == 0: + self.log.info(f"{evt.room_id} is SFW") + nsfw_results = False + redact_nsfw = self.actions.get("redact_nsfw", False) + if ignore_sfw and not nsfw_results: + self.log.info(f"Ignored SFW images in {evt.room_id}") + return + if self.actions.get("direct_reply", False): + await evt.reply(response) + if self.report_to_room: + try: + await self.client.send_text(room_id=RoomID(self.report_to_room), text=response) + except MBadJSON as e: + self.log.warning(f"Failed to send message to {RoomID(self.report_to_room)}: {e}") + if nsfw_results and redact_nsfw: + try: + await self.client.redact(room_id=evt.room_id, event_id=evt.event_id, reason="NSFW") + self.log.info(f"Redacted NSFW message in {evt.room_id}") + except MForbidden: + self.log.warning(f"Failed to redact NSFW message in {evt.room_id}") + except Exception as e: + self.log.error(f"Error sending responses: {e}") + def create_matrix_to_url(self, room_id: RoomID, event_id: EventID) -> str: + """ + Create a matrix.to URL for a given room ID and event ID. + + :param room_id: The room ID. + :param event_id: The event ID. + :return: The matrix.to URL. + """ + via_params = ( + str("?" + "&".join([f"via={server}" for server in self.via_servers])) + if self.via_servers + else "" + ) + return f"https://matrix.to/#/{room_id}/{event_id}{via_params}" + def extract_img_tags(self, html: str) -> List[str]: + """ + Extract image URLs from tags in the HTML content. + + :param html: The HTML content. + :return: List of image URLs. + """ + soup = BeautifulSoup(html, "html.parser") + return [img["src"] for img in soup.find_all("img") if "src" in img.attrs] diff --git a/requirements.txt b/requirements.txt new file mode 100644 index 0000000..02508b4 --- /dev/null +++ b/requirements.txt @@ -0,0 +1,3 @@ +beautifulsoup4 +nsfwdetection +maubot