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This commit is contained in:
Robin Appelman 2018-07-30 16:52:52 +02:00
commit dbe66f1dd9
5 changed files with 513 additions and 0 deletions

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**/*.rs.bk

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clipboard-sync.iml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<module type="RUST_MODULE" version="4">
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</module>

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src/server.rs Normal file
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#[macro_use]
extern crate serde_derive;
extern crate ws;
extern crate mio;
extern crate serde;
extern crate serde_json;
use mio::Token;
use std::collections::HashMap;
use ws::{listen, Handler, Sender, Result, Message, CloseCode, Error};
use std::rc::Rc;
use std::cell::RefCell;
#[derive(Debug, Serialize, Deserialize)]
#[serde(tag = "type")]
enum ClipboardCommand {
#[serde(rename = "listen")]
Listen { session: String },
#[serde(rename = "set")]
Set { session: String, value: String }
}
struct Session {
clients: HashMap<Token, Sender>,
value: String
}
fn handle_command(command: ClipboardCommand, sessions: &mut HashMap<String, Session>, client: Sender) {
match command {
ClipboardCommand::Listen { session: session_name } => {
if !sessions.contains_key(&session_name) {
let mut new_session = Session {
clients: HashMap::new(),
value: String::new()
};
new_session.clients.insert(client.token(), client);
sessions.insert(session_name.clone(), new_session);
} else {
let value = (&sessions.get(&session_name).unwrap().value).to_string();
let command_text: String = serde_json::to_string(&ClipboardCommand::Set {
session: session_name.clone(),
value
}).unwrap();
client.send(Message::from(command_text.clone())).ok();
let session = sessions.get_mut(&session_name).unwrap();
session.clients.insert(client.token(), client);
}
}
ClipboardCommand::Set { value, session: session_name } => {
match sessions.get_mut(&session_name) {
Some(mut session) => {
session.value = value.clone();
send_to_session(session, &ClipboardCommand::Set {
value,
session: session_name
});
}
None => println!("session {} not found", session_name)
}
}
}
}
fn send_to_session(session: &Session, command: &ClipboardCommand) {
let command_text = serde_json::to_string(command).unwrap();
for client in session.clients.values() {
client.send(Message::from(command_text.clone())).ok();
}
}
struct Server {
out: Sender,
sessions: Rc<RefCell<HashMap<String, Session>>>,
}
impl Handler for Server {
fn on_message(&mut self, msg: Message) -> Result<()> {
let result: serde_json::Result<ClipboardCommand> = serde_json::from_str(msg.as_text().unwrap_or_default());
match result {
Ok(command) => {
handle_command(command, &mut self.sessions.borrow_mut(), self.out.clone());
Ok(())
}
Err(_) => {
println!("invalid message: {}", msg.as_text().unwrap_or_default());
Ok(())
}
}
}
fn on_close(&mut self, _: CloseCode, _: &str) {
let mut sessions = self.sessions.borrow_mut();
let token = self.out.token();
for session in sessions.values_mut() {
session.clients.remove(&token);
}
}
fn on_error(&mut self, err: Error) {
println!("The server encountered an error: {:?}", err);
}
}
fn main() {
let port = std::env::var("PORT").unwrap_or("80".to_string());
let listen_adress = format!("0.0.0.0:{}", port);
println!("listening on: {:?}", listen_adress);
let sessions: Rc<RefCell<HashMap<String, Session>>> = Rc::new(RefCell::new(HashMap::new()));
listen(listen_adress, |out| { Server { out, sessions: sessions.clone() } }).unwrap()
}