97 lines
2.8 KiB
Rust
97 lines
2.8 KiB
Rust
use tungstenite::Message;
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use tungstenite::protocol::WebSocket;
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use tungstenite::server::accept;
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use tungstenite::error::Error;
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use tungstenite::Message::Binary;
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use std::net::{TcpListener, TcpStream};
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use serde_cbor::{to_vec};
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use std::env;
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use std::thread::spawn;
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use r2d2::{Pool};
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use r2d2::{PooledConnection};
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use r2d2_postgres::{TlsMode, PostgresConnectionManager};
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static DB_POOL_SIZE: u32 = 20;
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pub type Db = PooledConnection<PostgresConnectionManager>;
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use rpc::{Rpc};
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use util::{startup};
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// struct Server {
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// client: WebSocket<TcpStream>,
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// rpc: Rpc,
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// db: Pool<PostgresConnectionManager>,
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// }
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#[derive(Debug,Clone,Serialize,Deserialize)]
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struct RpcErrorResponse {
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err: String
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}
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fn receive(db: Db, rpc: &Rpc, msg: Message, client: &mut WebSocket<TcpStream>) -> Result<(), Error> {
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match rpc.receive(msg, &db, client) {
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Ok(reply) => {
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let response = to_vec(&reply)
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.expect("failed to serialize response");
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client.write_message(Binary(response))
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},
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Err(e) => {
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println!("{:?}", e);
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let response = to_vec(&RpcErrorResponse { err: e.to_string() })
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.expect("failed to serialize error response");
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client.write_message(Binary(response))
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}
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}
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}
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pub fn db_connection(url: String) -> Pool<PostgresConnectionManager> {
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let manager = PostgresConnectionManager::new(url, TlsMode::None)
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.expect("could not instantiate pg manager");
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Pool::builder()
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.max_size(DB_POOL_SIZE)
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.build(manager)
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.expect("Failed to create pool.")
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}
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pub fn start() {
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let database_url = env::var("DATABASE_URL")
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.expect("DATABASE_URL must be set");
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let pool = db_connection(database_url);
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{
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let startup_connection = pool.get().expect("unable to get db connection");
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startup(startup_connection).unwrap();
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}
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let server = TcpListener::bind("0.0.0.0:40000").unwrap();
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for stream in server.incoming() {
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let db = pool.clone();
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spawn (move || {
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let mut websocket = accept(stream.unwrap()).unwrap();
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let rpc = Rpc {};
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loop {
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match websocket.read_message() {
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Ok(msg) => {
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let db_connection = db.get().expect("unable to get db connection");
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match receive(db_connection, &rpc, msg, &mut websocket) {
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Ok(_r) => (),
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Err(e) => println!("{:?}", e),
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}
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},
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// connection is closed
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Err(e) => {
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println!("{:?}", e);
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return;
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}
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};
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}
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});
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}
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}
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