Files
reticulum-meshchatX/web.py
2024-05-04 04:58:15 +12:00

801 lines
32 KiB
Python

#!/usr/bin/env python
import argparse
import json
import os
import signal
import time
from datetime import datetime, timezone
from typing import Callable, List
import RNS
import LXMF
from aiohttp import web, WSMessage, WSMsgType, WSCloseCode
import asyncio
import base64
import database
class ReticulumWebChat:
def __init__(self, webchat_config_file, reticulum_config_dir, identity: RNS.Identity):
# default values before loading config
self.display_name = "Anonymous Peer"
# load config
self.config_file = webchat_config_file or "storage/config.json"
self.load_config()
# init database
self.db = database.database
self.db.connect()
self.db.create_tables([
database.LxmfMessage,
])
# init reticulum
self.reticulum = RNS.Reticulum(reticulum_config_dir)
self.identity = identity
# init lxmf router
self.message_router = LXMF.LXMRouter(identity=self.identity, storagepath="storage/lxmf")
# register lxmf identity
self.local_lxmf_destination = self.message_router.register_delivery_identity(self.identity)
# set a callback for when an lxmf message is received
self.message_router.register_delivery_callback(self.on_lxmf_delivery)
# set a callback for when an lxmf announce is received
RNS.Transport.register_announce_handler(LXMFAnnounceHandler(self.on_lxmf_announce_received))
# remember websocket clients
self.websocket_clients: List[web.WebSocketResponse] = []
def load_config(self):
# default config
config = {
}
# attempt to load config and override default values
try:
with open(self.config_file, 'r') as f:
custom_config = json.load(f)
config |= custom_config
# config is broken, fallback to defaults
except:
print("failed to load config, defaults will be used")
# update display name from config
if "display_name" in config:
self.display_name = config["display_name"]
# return loaded config
return config
def save_config(self):
# build config
config = {
"display_name": self.display_name,
}
# attempt to save config
try:
with open(self.config_file, 'w') as f:
json.dump(config, f, indent=4)
# config is broken, fallback to defaults
except:
print("failed to save config")
# web server has shutdown, likely ctrl+c, but if we don't do the following, the script never exits
async def shutdown(self, app):
# force close websocket clients
for websocket_client in self.websocket_clients:
print("force closing websocket for shutdown")
await websocket_client.close(code=WSCloseCode.GOING_AWAY)
print("force closed websocket")
# stop reticulum
print("stopping reticulum")
RNS.Transport.detach_interfaces()
self.reticulum.exit_handler()
RNS.exit()
def run(self, host, port):
# create route table
routes = web.RouteTableDef()
# serve index.html
@routes.get("/")
async def index(request):
return web.FileResponse(path="public/index.html")
# handle websocket clients
@routes.get("/ws")
async def ws(request):
# prepare websocket response
websocket_response = web.WebSocketResponse()
await websocket_response.prepare(request)
# add client to connected clients list
self.websocket_clients.append(websocket_response)
# send config to all clients
await self.send_config_to_websocket_clients()
# send known peers to all clients
await self.send_known_peers_to_websocket_clients()
# handle websocket messages until disconnected
async for msg in websocket_response:
msg: WSMessage = msg
if msg.type == WSMsgType.TEXT:
try:
data = json.loads(msg.data)
await self.on_websocket_data_received(websocket_response, data)
except Exception as e:
# ignore errors while handling message
print("failed to process client message")
print(e)
elif msg.type == WSMsgType.ERROR:
# ignore errors while handling message
print('ws connection error %s' % websocket_response.exception())
# websocket closed
self.websocket_clients.remove(websocket_response)
return websocket_response
# serve lxmf messages
@routes.get("/api/v1/lxmf-messages")
async def index(request):
# get query params
source_hash = request.query.get("source_hash", None)
destination_hash = request.query.get("destination_hash", None)
# source_hash is required
if source_hash is None:
return web.json_response({
"message": "source_hash is required",
}, status=422)
# destination_hash is required
if destination_hash is None:
return web.json_response({
"message": "destination_hash is required",
}, status=422)
# get lxmf messages from db where "source to destination" or "destination to source" and ordered by oldest to newest
db_lxmf_messages = (database.LxmfMessage.select()
.where((database.LxmfMessage.source_hash == source_hash) & (database.LxmfMessage.destination_hash == destination_hash))
.orwhere((database.LxmfMessage.destination_hash == source_hash) & (database.LxmfMessage.source_hash == destination_hash))
.order_by(database.LxmfMessage.id.asc())
)
# convert to response json
lxmf_messages = []
for db_lxmf_message in db_lxmf_messages:
lxmf_messages.append({
"id": db_lxmf_message.id,
"hash": db_lxmf_message.hash,
"source_hash": db_lxmf_message.source_hash,
"destination_hash": db_lxmf_message.destination_hash,
"is_incoming": db_lxmf_message.is_incoming,
"state": db_lxmf_message.state,
"progress": db_lxmf_message.progress,
"content": db_lxmf_message.content,
"fields": json.loads(db_lxmf_message.fields),
"created_at": db_lxmf_message.created_at.replace(tzinfo=timezone.utc).isoformat(),
"updated_at": db_lxmf_message.updated_at.replace(tzinfo=timezone.utc).isoformat(),
})
return web.json_response({
"lxmf_messages": lxmf_messages,
})
asyncio.get_event_loop().add_signal_handler(signal.SIGINT, lambda: exit(-1))
asyncio.get_event_loop().add_signal_handler(signal.SIGTERM, lambda: exit(-1))
# create and run web app
app = web.Application()
app.add_routes(routes)
app.add_routes([web.static('/', "public")]) # serve anything in public folder
app.on_shutdown.append(self.shutdown) # need to force close websockets and stop reticulum now
web.run_app(app, host=host, port=port)
# handle data received from websocket client
async def on_websocket_data_received(self, client, data):
# get type from client data
_type = data["type"]
# handle updating config
if _type == "config.set":
# send lxmf message to destination
config = data["config"]
# update display name in state
if "display_name" in config and config["display_name"] != "":
self.display_name = config["display_name"]
print("updated display name to: " + self.display_name)
# save config
self.save_config()
# send config to websocket clients
await self.send_config_to_websocket_clients()
# handle sending an lxmf message
elif _type == "lxmf.delivery":
# send lxmf message to destination
destination_hash = data["destination_hash"]
message = data["message"]
await self.send_message(destination_hash, message)
# # TODO: send response to client when marked as delivered?
# await client.send(json.dumps({
# "type": "lxmf.sent",
# }))
# handle sending an announce
elif _type == "announce":
# send announce for lxmf
self.local_lxmf_destination.announce(app_data=self.display_name.encode("utf-8"))
# handle downloading a file from a nomadnet node
elif _type == "nomadnet.file.download":
# get data from websocket client
destination_hash = data["nomadnet_file_download"]["destination_hash"]
file_path = data["nomadnet_file_download"]["file_path"]
# convert destination hash to bytes
destination_hash = bytes.fromhex(destination_hash)
# handle successful file download
def on_file_download_success(file_name, file_bytes):
asyncio.run(client.send(json.dumps({
"type": "nomadnet.file.download",
"nomadnet_file_download": {
"status": "success",
"destination_hash": destination_hash.hex(),
"file_path": file_path,
"file_name": file_name,
"file_bytes": base64.b64encode(file_bytes).decode("utf-8"),
},
})))
# handle file download failure
def on_file_download_failure(failure_reason):
asyncio.run(client.send(json.dumps({
"type": "nomadnet.file.download",
"nomadnet_file_download": {
"status": "error",
"failure_reason": failure_reason,
"destination_hash": destination_hash.hex(),
"file_path": file_path,
},
})))
# handle file download progress
def on_file_download_progress(progress):
asyncio.run(client.send(json.dumps({
"type": "nomadnet.file.download",
"nomadnet_file_download": {
"status": "progress",
"progress": progress,
"destination_hash": destination_hash.hex(),
"file_path": file_path,
},
})))
# todo: handle file download progress
# download the file
NomadnetFileDownloader(destination_hash, file_path, on_file_download_success, on_file_download_failure, on_file_download_progress)
# handle downloading a page from a nomadnet node
elif _type == "nomadnet.page.download":
# get data from websocket client
destination_hash = data["nomadnet_page_download"]["destination_hash"]
page_path = data["nomadnet_page_download"]["page_path"]
# convert destination hash to bytes
destination_hash = bytes.fromhex(destination_hash)
# handle successful page download
def on_page_download_success(page_content):
asyncio.run(client.send(json.dumps({
"type": "nomadnet.page.download",
"nomadnet_page_download": {
"status": "success",
"destination_hash": destination_hash.hex(),
"page_path": page_path,
"page_content": page_content,
},
})))
# handle page download failure
def on_page_download_failure(failure_reason):
asyncio.run(client.send(json.dumps({
"type": "nomadnet.page.download",
"nomadnet_page_download": {
"status": "error",
"failure_reason": failure_reason,
"destination_hash": destination_hash.hex(),
"page_path": page_path,
},
})))
# handle page download progress
def on_page_download_progress(progress):
asyncio.run(client.send(json.dumps({
"type": "nomadnet.page.download",
"nomadnet_page_download": {
"status": "progress",
"progress": progress,
"destination_hash": destination_hash.hex(),
"page_path": page_path,
},
})))
# todo: handle page download progress
# download the page
NomadnetPageDownloader(destination_hash, page_path, on_page_download_success, on_page_download_failure, on_page_download_progress)
# unhandled type
else:
print("unhandled client message type: " + _type)
# broadcast provided data to all connected websocket clients
async def websocket_broadcast(self, data):
for websocket_client in self.websocket_clients:
await websocket_client.send_str(data)
# broadcasts config to all websocket clients
async def send_config_to_websocket_clients(self):
await self.websocket_broadcast(json.dumps({
"type": "config",
"config": {
"display_name": self.display_name,
"identity_hash": self.identity.hexhash,
"lxmf_address_hash": self.local_lxmf_destination.hexhash,
},
}))
# broadcasts known peers to all websocket clients
async def send_known_peers_to_websocket_clients(self):
# process known peers
known_peers = []
for destination_hash in RNS.Identity.known_destinations:
known_destination = RNS.Identity.known_destinations[destination_hash]
last_announce_timestamp = known_destination[0]
known_peers.append({
"destination_hash": destination_hash.hex(),
"app_data": self.convert_app_data_to_string(RNS.Identity.recall_app_data(destination_hash)),
"last_announce_timestamp": last_announce_timestamp,
})
# send known peers to websocket clients
await self.websocket_broadcast(json.dumps({
"type": "known_peers",
"known_peers": known_peers,
}))
# convert app data to string, or return none unable to do so
def convert_app_data_to_string(self, app_data):
# attempt to convert to utf-8 string
if app_data is not None:
try:
return app_data.decode("utf-8")
except:
# ignore failure to convert to string
pass
# unable to convert to string
return None
# convert an lxmf message to a dictionary, for sending over websocket
def convert_lxmf_message_to_dict(self, lxmf_message: LXMF.LXMessage):
# handle fields
fields = {}
message_fields = lxmf_message.get_fields()
for field_type in message_fields:
value = message_fields[field_type]
# handle file attachments field
if field_type == LXMF.FIELD_FILE_ATTACHMENTS:
# process file attachments
file_attachments = []
for file_attachment in value:
file_name = file_attachment[0]
file_bytes = base64.b64encode(file_attachment[1]).decode("utf-8")
file_attachments.append({
"file_name": file_name,
"file_bytes": file_bytes,
})
# add to fields
fields["file_attachments"] = file_attachments
# handle image field
if field_type == LXMF.FIELD_IMAGE:
image_type = value[0]
image_bytes = base64.b64encode(value[1]).decode("utf-8")
fields["image"] = {
"image_type": image_type,
"image_bytes": image_bytes,
}
# convert 0.0-1.0 progress to 0.00-100 percentage
progress_percentage = round(lxmf_message.progress * 100, 2)
return {
"hash": lxmf_message.hash.hex(),
"source_hash": lxmf_message.source_hash.hex(),
"destination_hash": lxmf_message.destination_hash.hex(),
"is_incoming": lxmf_message.incoming,
"state": self.convert_lxmf_state_to_string(lxmf_message),
"progress": progress_percentage,
"content": lxmf_message.content.decode('utf-8'),
"fields": fields,
}
# convert lxmf state to a human friendly string
def convert_lxmf_state_to_string(self, lxmf_message: LXMF.LXMessage):
# convert state to string
lxmf_message_state = "unknown"
if lxmf_message.state == LXMF.LXMessage.DRAFT:
lxmf_message_state = "draft"
elif lxmf_message.state == LXMF.LXMessage.OUTBOUND:
lxmf_message_state = "outbound"
elif lxmf_message.state == LXMF.LXMessage.SENDING:
lxmf_message_state = "sending"
elif lxmf_message.state == LXMF.LXMessage.SENT:
lxmf_message_state = "sent"
elif lxmf_message.state == LXMF.LXMessage.DELIVERED:
lxmf_message_state = "delivered"
elif lxmf_message.state == LXMF.LXMessage.FAILED:
lxmf_message_state = "failed"
return lxmf_message_state
# handle an lxmf delivery from reticulum
# NOTE: cant be async, as Reticulum doesn't await it
def on_lxmf_delivery(self, message):
try:
# convert lxmf message to dict
lxmf_message_dict = self.convert_lxmf_message_to_dict(message)
# save to database
lxmf_message_db = database.LxmfMessage(
hash=lxmf_message_dict["hash"],
source_hash=lxmf_message_dict["source_hash"],
destination_hash=lxmf_message_dict["destination_hash"],
is_incoming=lxmf_message_dict["is_incoming"],
state=lxmf_message_dict["state"],
progress=lxmf_message_dict["progress"],
content=lxmf_message_dict["content"],
fields=json.dumps(lxmf_message_dict["fields"]),
)
lxmf_message_db.save()
# send received lxmf message data to all websocket clients
asyncio.run(self.websocket_broadcast(json.dumps({
"type": "lxmf.delivery",
"lxmf_message": self.convert_lxmf_message_to_dict(message),
})))
except Exception as e:
# do nothing on error
print("lxmf_delivery error: {}".format(e))
# handle delivery status update for an outbound lxmf message
def on_lxmf_sending_state_updated(self, lxmf_message):
# upsert lxmf message to database
self.db_upsert_lxmf_message(lxmf_message)
# send lxmf message state to all websocket clients
asyncio.run(self.websocket_broadcast(json.dumps({
"type": "lxmf_message_state_updated",
"lxmf_message": self.convert_lxmf_message_to_dict(lxmf_message),
})))
# handle delivery failed for an outbound lxmf message
def on_lxmf_sending_failed(self, lxmf_message):
# just pass this on, we don't need to do anything special
self.on_lxmf_sending_state_updated(lxmf_message)
# upserts the provided lxmf message to the database
def db_upsert_lxmf_message(self, lxmf_message: LXMF.LXMessage):
# convert lxmf message to dict
lxmf_message_dict = self.convert_lxmf_message_to_dict(lxmf_message)
# prepare data to insert or update
data = {
"hash": lxmf_message_dict["hash"],
"source_hash": lxmf_message_dict["source_hash"],
"destination_hash": lxmf_message_dict["destination_hash"],
"is_incoming": lxmf_message_dict["is_incoming"],
"state": lxmf_message_dict["state"],
"progress": lxmf_message_dict["progress"],
"content": lxmf_message_dict["content"],
"fields": json.dumps(lxmf_message_dict["fields"]),
"updated_at": datetime.now(),
}
# upsert to database
query = database.LxmfMessage.insert(data)
query = query.on_conflict(conflict_target=[database.LxmfMessage.hash], update=data)
query.execute()
# handle sending an lxmf message to reticulum
async def send_message(self, destination_hash, message_content):
try:
# convert destination hash to bytes
destination_hash = bytes.fromhex(destination_hash)
# FIXME: can this be removed, and just rely on the router to check paths?
# find destination identity from hash
destination_identity = RNS.Identity.recall(destination_hash)
if destination_identity is None:
# we don't know the path/identity for this destination hash, we will request it
RNS.Transport.request_path(destination_hash)
# we have to bail out of sending, since we don't have the path yet
return
# create destination for recipients lxmf delivery address
lxmf_destination = RNS.Destination(destination_identity, RNS.Destination.OUT, RNS.Destination.SINGLE, "lxmf", "delivery")
# create lxmf message
lxmf_message = LXMF.LXMessage(lxmf_destination, self.local_lxmf_destination, message_content, desired_method=LXMF.LXMessage.DIRECT)
lxmf_message.try_propagation_on_fail = True
lxmf_message.register_delivery_callback(self.on_lxmf_sending_state_updated)
lxmf_message.register_failed_callback(self.on_lxmf_sending_failed)
# send lxmf message to be routed to destination
self.message_router.handle_outbound(lxmf_message)
# upsert lxmf message to database
self.db_upsert_lxmf_message(lxmf_message)
# send outbound lxmf message to websocket (after passing to router so hash is available)
await self.websocket_broadcast(json.dumps({
"type": "lxmf_outbound_message_created",
"lxmf_message": self.convert_lxmf_message_to_dict(lxmf_message),
}))
except:
# FIXME send error to websocket?
print("failed to send lxmf message")
# handle an announce received from reticulum, for an lxmf address
# NOTE: cant be async, as Reticulum doesn't await it
def on_lxmf_announce_received(self, destination_hash, announced_identity, app_data):
# log received announce
RNS.log("Received an announce from " + RNS.prettyhexrep(destination_hash))
# parse app data
parsed_app_data = None
if app_data is not None:
parsed_app_data = app_data.decode("utf-8")
# send received lxmf announce to all websocket clients
asyncio.run(self.websocket_broadcast(json.dumps({
"type": "announce",
"announce": {
"destination_hash": destination_hash.hex(),
"app_data": parsed_app_data,
"last_announce_timestamp": time.time(),
},
})))
# an announce handler for lxmf.delivery aspect that just forwards to a provided callback
class LXMFAnnounceHandler:
def __init__(self, received_announce_callback):
self.aspect_filter = "lxmf.delivery"
self.received_announce_callback = received_announce_callback
# we will just pass the received announce back to the provided callback
def received_announce(self, destination_hash, announced_identity, app_data):
try:
# handle received announce
self.received_announce_callback(destination_hash, announced_identity, app_data)
except:
# ignore failure to handle received announce
pass
class NomadnetDownloader:
def __init__(self, destination_hash: bytes, path: str, on_download_success: Callable[[bytes], None], on_download_failure: Callable[[str], None], on_progress_update: Callable[[float], None], timeout: int|None = None, auto_download=True):
self.app_name = "nomadnetwork"
self.aspects = "node"
self.destination_hash = destination_hash
self.path = path
self.timeout = timeout
self.on_download_success = on_download_success
self.on_download_failure = on_download_failure
self.on_progress_update = on_progress_update
if auto_download:
self.download()
# setup link to destination and request download
def download(self):
# request path to destination
RNS.Transport.request_path(self.destination_hash)
# find existing identity
identity = RNS.Identity.recall(self.destination_hash)
if identity is None:
self.on_download_failure("identity not found")
return
# create destination to nomadnet node
destination = RNS.Destination(
identity,
RNS.Destination.OUT,
RNS.Destination.SINGLE,
self.app_name,
self.aspects,
)
# create link to destination
RNS.Link(destination, established_callback=self.link_established)
# link to destination was established, we should now request the download
def link_established(self, link):
# request download over link
link.request(
self.path,
data=None,
response_callback=self.on_response,
failed_callback=self.on_failed,
progress_callback=self.on_progress,
timeout=self.timeout,
)
# handle successful download
def on_response(self, request_receipt):
print("file_received")
self.on_download_success(request_receipt.response)
# handle failure
def on_failed(self, request_receipt=None):
self.on_download_failure("request_failed")
# handle download progress
def on_progress(self, request_receipt):
self.on_progress_update(request_receipt.progress)
class NomadnetPageDownloader(NomadnetDownloader):
def __init__(self, destination_hash: bytes, page_path: str, on_page_download_success: Callable[[str], None], on_page_download_failure: Callable[[str], None], on_progress_update: Callable[[float], None], timeout: int|None = None, auto_download=True):
self.on_page_download_success = on_page_download_success
self.on_page_download_failure = on_page_download_failure
super().__init__(destination_hash, page_path, self.on_download_success, self.on_download_failure, on_progress_update, timeout, auto_download)
# page download was successful, decode the response and send to provided callback
def on_download_success(self, response_bytes):
micron_markup_response = response_bytes.decode("utf-8")
self.on_page_download_success(micron_markup_response)
# page download failed, send error to provided callback
def on_download_failure(self, failure_reason):
self.on_page_download_failure(failure_reason)
class NomadnetFileDownloader(NomadnetDownloader):
def __init__(self, destination_hash: bytes, page_path: str, on_file_download_success: Callable[[str, bytes], None], on_file_download_failure: Callable[[str], None], on_progress_update: Callable[[float], None], timeout: int|None = None, auto_download=True):
self.on_file_download_success = on_file_download_success
self.on_file_download_failure = on_file_download_failure
super().__init__(destination_hash, page_path, self.on_download_success, self.on_download_failure, on_progress_update, timeout, auto_download)
# file download was successful, decode the response and send to provided callback
def on_download_success(self, response):
file_name: str = response[0]
file_data: bytes = response[1]
self.on_file_download_success(file_name, file_data)
# page download failed, send error to provided callback
def on_download_failure(self, failure_reason):
self.on_file_download_failure(failure_reason)
def main():
# parse command line args
parser = argparse.ArgumentParser(description="ReticulumWebChat")
parser.add_argument("--host", nargs='?', default="0.0.0.0", type=str, help="The address the web server should listen on.")
parser.add_argument("--port", nargs='?', default="8000", type=int, help="The port the web server should listen on.")
parser.add_argument("--identity-file", type=str, help="Path to a Reticulum Identity file to use as your LXMF address.")
parser.add_argument("--identity-base64", type=str, help="A base64 encoded Reticulum Identity to use as your LXMF address.")
parser.add_argument("--generate-identity-file", type=str, help="Generates and saves a new Reticulum Identity to the provided file path and then exits.")
parser.add_argument("--generate-identity-base64", action='store_true', help="Outputs a randomly generated Reticulum Identity as base64 and then exits.")
parser.add_argument("--reticulum-config-dir", type=str, help="Path to a Reticulum config directory for the RNS stack to use (e.g: ~/.reticulum)")
parser.add_argument("--webchat-config-file", type=str, help="Path to a ReticulumWebChat config file for saving user preferences.")
args = parser.parse_args()
# util to generate reticulum identity and save to file without using rnid
if args.generate_identity_file is not None:
# do not overwrite existing files, otherwise user could lose existing keys
if os.path.exists(args.generate_identity_file):
print("DANGER: the provided identity file path already exists, not overwriting!")
return
# generate a new identity and save to provided file path
identity = RNS.Identity(create_keys=True)
with open(args.generate_identity_file, "wb") as file:
file.write(identity.get_private_key())
print("A new Reticulum Identity has been saved to: {}".format(args.generate_identity_file))
return
# util to generate reticulum identity as base64 without using rnid
if args.generate_identity_base64 is True:
identity = RNS.Identity(create_keys=True)
print(base64.b64encode(identity.get_private_key()).decode("utf-8"))
return
# use provided identity, or fallback to a random one
if args.identity_file is not None:
identity = RNS.Identity(create_keys=False)
identity.load(args.identity_file)
print("Reticulum Identity has been loaded from file.")
print(identity)
elif args.identity_base64 is not None:
identity = RNS.Identity(create_keys=False)
identity.load_private_key(base64.b64decode(args.identity_base64))
print("Reticulum Identity has been loaded from base64.")
print(identity)
else:
identity = RNS.Identity(create_keys=True)
print("Reticulum Identity has been randomly generated.")
print(identity)
# init app
reticulum_webchat = ReticulumWebChat(args.webchat_config_file, args.reticulum_config_dir, identity)
reticulum_webchat.run(args.host, args.port)
if __name__ == "__main__":
main()