created server version 3
this works on the face that a ui framework will have an event loop. so changes include: + start sets up the listener and allows the server to ba called + stop sets the server to disconnect other users and close the listener + tick should be called by the event loop this will allow any new connections to be handled, any pending
This commit is contained in:
michael-bailey
michael bailey
parent
ad2c83c01c
commit
638b1ac969
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@ -0,0 +1,281 @@
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use std::{sync::{Mutex, Arc}, net::{TcpStream, TcpListener}, collections::HashMap, io, io::{Write, Read}, thread};
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use crate::{
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server::client::clientV3::Client,
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commands::Commands
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};
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use crossbeam_channel::{Sender, Receiver, unbounded};
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use log::info;
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use std::time::Duration;
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#[derive(Debug)]
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pub enum ServerMessages {
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RequestUpdate(Arc<Mutex<TcpStream>>),
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RequestInfo(String, Arc<Mutex<TcpStream>>),
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Disconnect(String),
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Shutdown,
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}
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pub enum ServerState {
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starting,
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started,
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stopping,
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stopped,
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}
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// MARK: - server struct
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pub struct Server {
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pub name: String,
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pub address: String,
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pub owner: String,
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pub state: ServerState,
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connected_clients: HashMap<String, Client>,
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sender: Sender<ServerMessages>,
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receiver: Receiver<ServerMessages>,
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listener: Option<TcpListener>,
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buffer: [u8; 1024],
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client_list_changed_handle: Box<dyn Fn(&Server)>,
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// metrics
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pub o2s_rqst: usize,
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pub c2s_msgs: usize,
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pub s2s_msgs: usize,
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pub s2c_msgs: usize,
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}
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// MARK: - server implemetation
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impl Server {
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pub fn new(name: &str, address: &str, author: &str) -> Result<Self, io::Error> {
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// creating server channels
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let (sender, receiver) = unbounded();
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Ok(
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Self {
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// server data
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name: name.to_string(),
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address: address.to_string(),
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owner: author.to_string(),
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connected_clients: HashMap::new(),
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state: ServerState::ready,
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// messages & connections
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sender,
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receiver,
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listener: None,
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buffer: [0; 1024],
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// event handles
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client_list_changed_handle: Box::new(|_s| info!("Server: client list changed.")),
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// metrics
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o2s_rqst: 0,
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c2s_msgs: 0,
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s2s_msgs: 0,
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s2c_msgs: 0,
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}
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)
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}
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#[allow(dead_code)]
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pub fn get_name(&self) -> String {
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self.name.clone()
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}
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#[allow(dead_code)]
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pub fn get_address(&self) -> String {
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self.address.clone()
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}
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#[allow(dead_code)]
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pub fn get_owner(&self) -> String {
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self.owner.clone()
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}
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pub fn tick(&mut self) {
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// check to see if this server is ready to execute things.
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if self.state != ServerState::ready {
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()
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}
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// check for any server messages in the channel
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println!("server: getting messages");
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for i in self.receiver.try_iter() {
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match i {
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// server calls
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ServerMessages::Shutdown => {
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self.s2s_msgs += 1;
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println!("server: shutting down...");
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for (k, v) in self.connected_clients.iter() {
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v.sender.send(Commands::Disconnect(None));
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}
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self.state = ServerState::stopping;
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},
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// client requests
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ServerMessages::RequestUpdate(stream_arc) => {
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self.c2s_msgs += 1;
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for (_k, v) in self.connected_clients.iter() {
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let mut stream = stream_arc.lock().unwrap();
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let _ = Server::send_data(&mut stream, v.to_string().as_str());
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let data = Server::recv_data(&mut stream, &mut self.buffer).unwrap_or(Commands::Error(None));
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if data == Commands::Success(None) {
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println!("Success Confirmed");
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} else {
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println!("No success read");
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let error = Commands::Error(None);
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let _ = Server::send_data(&mut stream, error.to_string().as_str());
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}
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}
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},
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// client requests for info
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ServerMessages::RequestInfo(uuid, stream_arc) => {
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self.c2s_msgs += 1;
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let mut stream = stream_arc.lock().unwrap();
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if let Some(client) = self.connected_clients.get(&uuid) {
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let params: HashMap<String, String> = [
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(String::from("uuid"), client.get_uuid()),
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(String::from("name"), client.get_username()),
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(String::from("host"), client.get_address())
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].iter().cloned().collect();
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let command = Commands::Success(Some(params));
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let _ = Server::send_data(&mut stream, command.to_string().as_str());
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} else {
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let command = Commands::Success(None);
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let _ = Server::send_data(&mut stream, command.to_string().as_str());
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}
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},
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// client disconnect requests
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ServerMessages::Disconnect(uuid) => {
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self.c2s_msgs += 1;
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self.connected_clients.remove(&uuid.to_string());
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let params: HashMap<String, String> = [(String::from("uuid"), uuid)].iter().cloned().collect();
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let command = Commands::ClientRemove(Some(params));
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let _ = self.connected_clients.iter().map(move |(_k, v)| {v.get_sender().send(command.clone())});
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},
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}
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}
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println!("server: checking for new connections");
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if let Ok((mut stream, _addr)) = self.listener.accept() {
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let _ = stream.set_read_timeout(Some(Duration::from_millis(1000)));
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let _ = stream.set_nonblocking(false);
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let request = Commands::Request(None);
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let _ = Server::send_data(&mut stream, &request.to_string().as_str());
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match Server::recv_data(&mut stream, &mut self.buffer) {
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Ok(Commands::Connect(Some(data))) => {
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self.o2s_rqst += 1;
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let uuid = data.get("uuid").unwrap();
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let username = data.get("name").unwrap();
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let address = data.get("host").unwrap();
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info!("{}", format!("Server: new client from {}", address ));
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let client = Client::new(stream, self.sender.clone(), &uuid, &username, &address);
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self.connected_clients.insert(uuid.to_string(), client);
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let params: HashMap<String, String> = [(String::from("name"), username.clone()), (String::from("host"), address.clone()), (String::from("uuid"), uuid.clone())].iter().cloned().collect();
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let new_client = Commands::Client(Some(params));
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let _ = self.connected_clients.iter().map( |(_k, v)| v.sender.send(new_client.clone()));
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},
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Ok(Commands::Info(None)) => {
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self.o2s_rqst += 1;
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println!("Server: info requested");
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let params: HashMap<String, String> = [(String::from("name"), self.name.to_string().clone()), (String::from("owner"), self.owner.to_string().clone())].iter().cloned().collect();
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let command = Commands::Info(Some(params));
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let _ = Server::send_data(&mut stream, command.to_string().as_str());
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},
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Err(_) => println!("ERROR: stream closed"),
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// TODO: - correct connection reset error when getting info.
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_ => {
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println!("Server: Invalid command sent");
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let _ = Server::send_data(&mut stream, Commands::Error(None).to_string().as_str());
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},
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}
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}
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println!("server: handing control to clients");
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for (_k, client) in self.connected_clients.iter_mut() {
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client.handle_connection();
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}
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}
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pub fn start(&mut self) -> Result<(), io::Error> {
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let listener = TcpListener::bind(self.address)?;
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listener.set_nonblocking(true)?;
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self.listener = Some(listener);
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}
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pub fn stop(&mut self) {
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info!("server: sending stop message");
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let _ = self.sender.send(ServerMessages::Shutdown);
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self.state = ServerState::stopping;
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}
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fn send_data(stream: &mut TcpStream, data: &str) -> Result<(), io::Error>{
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println!("Transmitting...");
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println!("data: {}", data);
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/*
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* This will throw an error and crash any thread, including the main thread, if
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* the connection is lost before transmitting. Maybe change to handle any exceptions
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* that may occur.
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*/
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let _ = stream.write(data.to_string().as_bytes())?;
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stream.flush()?;
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Ok(())
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}
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fn recv_data(stream: &mut TcpStream, buffer: &mut [u8; 1024]) -> Result<Commands, io::Error> {
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let _ = stream.read(buffer)?;
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let command = Commands::from(buffer);
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Ok(command)
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}
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}
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impl ToString for Server {
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fn to_string(&self) -> std::string::String { todo!() }
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}
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impl Drop for Server {
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fn drop(&mut self) {
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println!("server dropped");
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let _ = self.sender.send(ServerMessages::Shutdown);
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}
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}
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@ -0,0 +1,217 @@
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extern crate regex;
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use std::{
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sync::Arc,
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sync::Mutex,
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net::{Shutdown, TcpStream},
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io::prelude::*,
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io::Error,
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//collections::HashMap,
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time::{Instant, Duration},
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io,
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};
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use crossbeam_channel::{
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Sender,
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Receiver,
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TryRecvError,
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unbounded
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};
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use log::info;
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use crate::{
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server::ServerV3::ServerMessages,
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commands::Commands,
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};
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#[derive(Debug)]
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pub struct Client {
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uuid: String,
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username: String,
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address: String,
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last_heartbeat: Instant,
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stream: Arc<Mutex<TcpStream>>,
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pub sender: Sender<Commands>,
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receiver: Receiver<Commands>,
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server_sender: Sender<ServerMessages>,
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}
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impl Client {
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pub fn new(stream: TcpStream, server_sender: Sender<ServerMessages>, uuid: &str, username: &str, address: &str) -> Self {
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let (sender, receiver): (Sender<Commands>, Receiver<Commands>) = unbounded();
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stream.set_read_timeout(Some(Duration::from_secs(1))).unwrap();
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Client {
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stream: Arc::new(Mutex::new(stream)),
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uuid: uuid.to_string(),
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username: username.to_string(),
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address: address.to_string(),
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sender,
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receiver,
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server_sender,
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last_heartbeat: Instant::now(),
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}
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}
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#[allow(dead_code)]
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pub fn get_sender(&self) -> &Sender<Commands> {
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&self.sender
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}
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#[allow(dead_code)]
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pub fn get_uuid(&self) -> String {
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self.uuid.clone()
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}
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#[allow(dead_code)]
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pub fn get_username(&self) -> String {
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self.username.clone()
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}
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#[allow(dead_code)]
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pub fn get_address(&self) -> String {
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self.address.clone()
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}
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// TODO: - add heartbeat timer.
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pub fn handle_connection(&mut self) {
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let mut buffer = [0; 1024];
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// TODO: - Check heartbeat
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{
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//info!("heartbeat")
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}
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info!("{}: handling connection", self.uuid);
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match self.read_data(&mut buffer) {
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Ok(Commands::Disconnect(None)) => {
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self.server_sender.send(ServerMessages::Disconnect(self.uuid.clone())).expect("sending message to server failed");
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self.stream.lock().unwrap().shutdown(Shutdown::Both).expect("shutdown call failed");
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},
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Ok(Commands::HeartBeat(None)) => {
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self.last_heartbeat = Instant::now();
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self.send_data(Commands::Success(None).to_string().as_str());
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},
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Ok(Commands::ClientUpdate(None)) => {
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self.send_data(Commands::Success(None).to_string().as_str());
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let _ = self.server_sender.send(ServerMessages::RequestUpdate(self.stream.clone()));
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},
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Ok(Commands::ClientInfo(Some(params))) => {
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let uuid = params.get("uuid").unwrap();
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let _ = self.server_sender.send(ServerMessages::RequestInfo(uuid.clone(), self.stream.clone()));
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},
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Ok(Commands::Error(None)) => {
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self.send_data(Commands::Error(None).to_string().as_str());
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},
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_ => {
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self.send_data(Commands::Error(None).to_string().as_str());
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},
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Err(_) => {
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// No data was read
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},
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}
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println!("buffer");
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// test to see if there is anything for the client to receive from its channel
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match self.receiver.try_recv() {
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/*command is on the channel*/
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Ok(Commands::ClientRemove(Some(params))) => {
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let mut retry: u8 = 3;
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'retry_loop1: loop {
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if retry < 1 {
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self.send_data(Commands::Error(None).to_string().as_str());
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break 'retry_loop1
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} else {
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self.send_data(Commands::ClientRemove(Some(params.clone())).to_string().as_str());
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if self.read_data(&mut buffer).unwrap_or(Commands::Error(None)) == Commands::Success(None) {
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break 'retry_loop1;
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} else {
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retry -= 1;
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}
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}
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}
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},
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Ok(Commands::Client(Some(params))) => {
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let mut retry: u8 = 3;
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'retry_loop2: loop {
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if retry < 1 {
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self.send_data(Commands::Error(None).to_string().as_str());
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break 'retry_loop2;
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} else {
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self.send_data(Commands::Client(Some(params.clone())).to_string().as_str());
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if self.read_data(&mut buffer).unwrap_or(Commands::Error(None)) == Commands::Success(None) {
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break 'retry_loop2;
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} else {
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retry -= 1;
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}
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}
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}
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},
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/*No data available yet*/
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Err(TryRecvError::Empty) => {},
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_ => {},
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}
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println!("---Client Thread Exit---");
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}
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// move into a drop perhaps
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#[allow(dead_code)]
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pub fn disconnect(&mut self){
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self.stream.lock().unwrap().shutdown(Shutdown::Both).expect("shutdown call failed");
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}
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pub fn send_data(&self, data: &str) {
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println!("Transmitting data: {}", data);
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let error_result = self.stream.lock().unwrap().write_all(data.to_string().as_bytes());
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if let Some(error) = error_result.err(){
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match error.kind() {
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// handle disconnections
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io::ErrorKind::NotConnected => {
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let _ = self.server_sender.send(ServerMessages::Disconnect(self.uuid.clone()));
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},
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_ => { },
|
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}
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}
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}
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fn read_data(&mut self, buffer: &mut [u8; 1024]) -> Result<Commands, Error> {
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let _ = self.stream.lock().unwrap().read(buffer)?;
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let command = Commands::from(buffer);
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|
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Ok(command)
|
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}
|
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|
||||
}
|
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|
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impl ToString for Client {
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fn to_string(&self) -> std::string::String { todo!() }
|
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}
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|
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impl Drop for Client {
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fn drop(&mut self) {
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let _ = self.stream.lock().unwrap().write_all(Commands::Disconnect(None).to_string().as_bytes());
|
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let _ = self.stream.lock().unwrap().shutdown(Shutdown::Both);
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||||
}
|
||||
}
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