feat: seperate into lib and cli packages
This commit is contained in:
Michel de Graaf
@@ -0,0 +1,537 @@
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use crate::actor::{Actor, ActorHandle, ConnectionState};
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use crate::client::ClientOperation;
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use crate::dispatcher::MessageDispatcher;
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use crate::message::peer::{
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FileSearchResponse, GetShareFileList, PeerInit, PlaceInQueueResponse,
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TransferRequest, TransferResponse, UploadFailedHandler,
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};
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use crate::message::server::MessageFactory;
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use crate::message::{Handlers, Message, MessageReader, MessageType};
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use crate::peer::Peer;
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use crate::types::{Download, FileSearchResult, Transfer};
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use crate::{debug, error, trace, warn};
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use std::io::{self, Error, Write};
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use std::net::TcpStream;
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use std::sync::mpsc::{Receiver, Sender};
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use std::sync::{Arc, RwLock};
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use std::time::{Duration, Instant};
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#[derive(Debug, Clone)]
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pub enum PeerMessage {
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SendMessage(Message),
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FileSearchResult(FileSearchResult),
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TransferRequest(Transfer),
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UploadFailed(String, String),
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TransferResponse {
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token: u32,
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allowed: bool,
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reason: Option<String>,
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},
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PlaceInQueueResponse {
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filename: String,
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place: u32,
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},
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SetUsername(String),
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QueueUpload(String),
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RequestTransfer(Download),
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ProcessRead,
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}
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pub struct PeerActor {
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peer: Arc<RwLock<Peer>>,
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stream: Option<TcpStream>,
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connection_state: ConnectionState,
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reader: MessageReader,
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client_channel: Sender<ClientOperation>,
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self_handle: Option<ActorHandle<PeerMessage>>,
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dispatcher: Option<MessageDispatcher<PeerMessage>>,
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dispatcher_receiver: Option<Receiver<PeerMessage>>,
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queued_messages: Vec<PeerMessage>,
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}
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impl PeerActor {
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pub fn new(
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peer: Peer,
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stream: Option<TcpStream>,
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reader: Option<MessageReader>,
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client_channel: Sender<ClientOperation>,
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) -> Self {
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let connection_state = if stream.is_some() {
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ConnectionState::Connected
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} else {
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ConnectionState::Disconnected
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};
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Self {
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peer: Arc::new(RwLock::new(peer)),
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stream,
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connection_state,
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reader: reader.unwrap_or_default(),
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client_channel,
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self_handle: None,
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dispatcher: None,
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dispatcher_receiver: None,
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queued_messages: Vec::new(),
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}
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}
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pub fn set_self_handle(&mut self, handle: ActorHandle<PeerMessage>) {
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self.self_handle = Some(handle);
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}
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fn initialize_dispatcher(&mut self) {
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let (dispatcher_sender, dispatcher_receiver) =
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std::sync::mpsc::channel::<PeerMessage>();
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self.dispatcher_receiver = Some(dispatcher_receiver);
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let mut handlers = Handlers::new();
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handlers.register_handler(FileSearchResponse);
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handlers.register_handler(TransferRequest);
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handlers.register_handler(TransferResponse);
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handlers.register_handler(GetShareFileList);
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handlers.register_handler(UploadFailedHandler);
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handlers.register_handler(PlaceInQueueResponse);
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handlers.register_handler(PeerInit);
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self.dispatcher = Some(MessageDispatcher::new(
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"peer".to_string(),
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dispatcher_sender,
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handlers,
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));
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}
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fn process_dispatcher_messages(&mut self) {
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let messages: Vec<PeerMessage> = self
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.dispatcher_receiver
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.as_ref()
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.map_or_else(Vec::new, |receiver| {
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let mut msgs = Vec::new();
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while let Ok(msg) = receiver.try_recv() {
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msgs.push(msg);
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}
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msgs
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});
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messages
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.iter()
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.for_each(|msg| self.handle_message(msg.clone()));
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}
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fn handle_message(&mut self, msg: PeerMessage) {
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if matches!(self.connection_state, ConnectionState::Connecting { .. }) {
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match &msg {
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PeerMessage::SetUsername(_) | PeerMessage::ProcessRead => {}
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_ => {
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self.queued_messages.push(msg);
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return;
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}
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}
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}
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match msg {
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PeerMessage::SendMessage(message) => {
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self.send_message(message);
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}
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PeerMessage::FileSearchResult(file_search) => {
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self.client_channel
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.send(ClientOperation::SearchResult(file_search))
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.unwrap();
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}
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PeerMessage::TransferRequest(transfer) => {
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let username = self.peer.read().unwrap().username.clone();
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debug!(
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"[peer:{}] TransferRequest for {}",
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username, transfer.token
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);
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self.client_channel
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.send(ClientOperation::UpdateDownloadTokens(
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transfer.clone(),
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username.clone(),
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))
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.unwrap();
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let transfer_response =
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MessageFactory::build_transfer_response_message(transfer);
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if let Some(ref handle) = self.self_handle {
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if let Err(e) =
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handle.send(PeerMessage::SendMessage(transfer_response))
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{
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error!("[peer:{}] Failed to send TransferResponse message: {}", username, e);
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}
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}
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}
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PeerMessage::TransferResponse {
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token,
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allowed,
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reason,
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} => {
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let username = self.peer.read().unwrap().username.clone();
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debug!(
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"[peer:{}] transfer response token: {} allowed: {}",
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username, token, allowed
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);
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if !allowed {
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if let Some(reason_text) = reason {
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debug!(
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"[peer:{}] Transfer rejected: {} - token {}, waiting for TransferRequest...",
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username, reason_text, token
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);
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}
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} else {
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debug!(
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"[peer:{}] Transfer allowed, ready to connect with token {:}",
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username, token
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);
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self.client_channel
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.send(ClientOperation::DownloadFromPeer(
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token,
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self.peer.read().unwrap().clone(),
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allowed,
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))
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.unwrap();
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}
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}
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PeerMessage::PlaceInQueueResponse { filename, place } => {
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let username = self.peer.read().unwrap().username.clone();
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debug!(
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"[peer:{}] Place in queue response - file: {}, place: {}",
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username, filename, place
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);
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}
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PeerMessage::SetUsername(username) => {
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trace!(
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"[peer:{}] SetUsername: {}",
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self.peer.read().unwrap().username,
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username
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);
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self.peer.write().unwrap().username = username;
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}
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PeerMessage::QueueUpload(filename) => {
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let message =
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MessageFactory::build_queue_upload_message(&filename);
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self.send_message(message);
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}
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PeerMessage::RequestTransfer(download) => {
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let message = MessageFactory::build_transfer_request_message(
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&download.filename,
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download.token,
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);
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self.send_message(message);
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}
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PeerMessage::ProcessRead => {
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self.process_read();
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}
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PeerMessage::UploadFailed(username, filename) => {
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self.client_channel
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.send(ClientOperation::UploadFailed(username, filename))
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.unwrap();
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}
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}
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}
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fn process_read(&mut self) {
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if self.reader.buffer_len() > 0 {
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self.extract_and_process_messages();
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}
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{
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let stream = match self.stream.as_mut() {
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Some(s) => s,
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None => return,
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};
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match self.reader.read_from_socket(stream) {
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Ok(()) => {}
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Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {}
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Err(ref e) if e.kind() == io::ErrorKind::TimedOut => {
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let peer_lock = self.peer.read().unwrap();
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debug!(
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"Read operation timed out for peer actor {:}:{:}",
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peer_lock.host, peer_lock.port
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);
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}
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Err(e) => {
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let username = self.peer.read().unwrap().username.clone();
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error!(
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"[peer:{}] Error reading from peer: {} (kind: {:?}). Disconnecting.",
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username, e, e.kind()
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);
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self.disconnect_with_error(e);
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return;
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}
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}
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}
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self.extract_and_process_messages();
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}
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fn extract_and_process_messages(&mut self) {
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let username = self.peer.read().unwrap().username.clone();
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let mut extracted_count = 0;
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loop {
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match self.reader.extract_message() {
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Ok(Some(mut message)) => {
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extracted_count += 1;
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trace!(
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"[peer:{}] ← Message #{}: {:?}",
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username,
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extracted_count,
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message
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.get_message_name(
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MessageType::Peer,
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message.get_message_code() as u32
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)
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.map_err(|e| e.to_string())
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);
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if let Some(ref dispatcher) = self.dispatcher {
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dispatcher.dispatch(&mut message);
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} else {
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warn!("[peer:{}] No dispatcher available!", username);
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}
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}
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Err(e) => {
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warn!(
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"[peer:{}] Error extracting message: {}. Disconnecting peer.",
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username, e
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);
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self.disconnect_with_error(e);
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return;
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}
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Ok(None) => {
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break;
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}
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}
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}
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self.process_dispatcher_messages();
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}
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fn send_message(&mut self, message: Message) {
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let stream = match self.stream.as_mut() {
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Some(s) => s,
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None => {
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error!("Cannot send message: stream is None");
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return;
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}
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};
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let username = self.peer.read().unwrap().username.clone();
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trace!(
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"[peer:{}] ➡ {:?}",
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username,
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message
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.get_message_name(
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MessageType::Peer,
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u32::from_le_bytes(
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message.get_slice(0, 4).try_into().unwrap()
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)
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)
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.map_err(|e| e.to_string())
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);
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if let Err(e) = stream.write_all(&message.get_buffer()) {
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error!(
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"[peer:{}] Error writing message: {}. Disconnecting.",
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username, e
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);
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self.disconnect_with_error(e);
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return;
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}
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if let Err(e) = stream.flush() {
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error!(
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"[peer:{}] Error flushing stream: {}. Disconnecting.",
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username, e
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);
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self.disconnect_with_error(e);
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}
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}
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fn disconnect_with_error(&mut self, error: Error) {
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let username = self.peer.read().unwrap().username.clone();
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debug!("[peer:{}] disconnect", username);
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self.stream.take();
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if let Err(e) = self.client_channel.send(
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ClientOperation::PeerDisconnected(username, Some(error.into())),
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) {
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error!("Failed to send disconnect notification: {}", e);
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}
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}
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fn disconnect(&mut self) {
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let username = self.peer.read().unwrap().username.clone();
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debug!("[peer:{}] disconnect", username);
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self.stream.take();
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if let Err(e) = self
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.client_channel
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.send(ClientOperation::PeerDisconnected(username, None))
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{
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error!("Failed to send disconnect notification: {}", e);
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}
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}
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fn initiate_connection(&mut self) -> bool {
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let peer = self.peer.read().unwrap();
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let username = peer.username.clone();
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let host = peer.host.clone();
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let port = peer.port;
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drop(peer);
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let socket_addr =
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format!("{}:{}", host, port).parse::<std::net::SocketAddr>();
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match socket_addr {
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Ok(addr) => {
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// Use connect_timeout to prevent blocking the thread for too long
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let timeout = Duration::from_secs(5);
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match TcpStream::connect_timeout(&addr, timeout) {
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Ok(stream) => {
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if let Err(e) = stream.set_nonblocking(true) {
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error!(
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"[peer:{}] Failed to set non-blocking: {}",
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username, e
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);
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self.disconnect_with_error(e);
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return false;
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}
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stream.set_nodelay(true).ok();
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self.stream = Some(stream);
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self.connection_state = ConnectionState::Connecting {
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since: Instant::now(),
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};
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true
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}
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Err(e) => {
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self.disconnect_with_error(e);
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false
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}
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}
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}
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Err(e) => {
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error!(
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"[peer:{}] Invalid socket address {}:{} - {}",
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username, host, port, e
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);
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self.disconnect_with_error(io::Error::new(
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io::ErrorKind::InvalidInput,
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e,
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));
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false
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}
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}
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}
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fn check_connection_status(&mut self) {
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let ConnectionState::Connecting { since } = self.connection_state
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else {
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return;
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};
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let username = self.peer.read().unwrap().username.clone();
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if since.elapsed() > Duration::from_secs(20) {
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error!("[peer:{}] Connection timeout after 20 seconds", username);
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self.disconnect_with_error(io::Error::new(
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io::ErrorKind::TimedOut,
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"Connection timeout",
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));
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return;
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}
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let Some(ref stream) = self.stream else {
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return;
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};
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match stream.peer_addr() {
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Ok(_) => {
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self.connection_state = ConnectionState::Connected;
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self.on_connection_established();
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}
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Err(ref e) if e.kind() == io::ErrorKind::NotConnected => {}
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Err(e) => {
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error!("[peer:{}] Connection failed: {}", username, e);
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self.disconnect_with_error(e);
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}
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}
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}
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fn on_connection_established(&mut self) {
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let peer = self.peer.read().unwrap();
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let username = peer.username.clone();
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let token = peer.token;
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drop(peer);
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let Some(ref mut stream) = self.stream else {
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return;
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};
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if let Some(token) = token {
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let handshake_msg = MessageFactory::build_watch_user(token);
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if let Err(e) = stream.write_all(&handshake_msg.get_data()) {
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error!(
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"[peer:{}] Failed to send watch user handshake: {}",
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username, e
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);
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self.disconnect_with_error(e);
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return;
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}
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}
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self.initialize_dispatcher();
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let queued = std::mem::take(&mut self.queued_messages);
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for msg in queued {
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self.handle_message(msg);
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}
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if let Some(ref handle) = self.self_handle {
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handle.send(PeerMessage::ProcessRead).ok();
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}
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self.process_read();
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}
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}
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impl Actor for PeerActor {
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type Message = PeerMessage;
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fn handle(&mut self, msg: Self::Message) {
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self.handle_message(msg);
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}
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fn on_start(&mut self) {
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if self.stream.is_none() {
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self.initiate_connection();
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} else {
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self.connection_state = ConnectionState::Connected;
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self.on_connection_established();
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}
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}
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fn on_stop(&mut self) {
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let username = self.peer.read().unwrap().username.clone();
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trace!("[peer:{}] actor stopping", username);
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self.disconnect();
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}
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fn tick(&mut self) {
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match self.connection_state {
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ConnectionState::Connecting { .. } => {
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self.check_connection_status();
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}
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ConnectionState::Connected => {
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if self.stream.is_some() {
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self.process_read();
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}
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}
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ConnectionState::Disconnected => {}
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}
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}
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}
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Reference in New Issue
Block a user