no service-checker script anymore, only rust

src/main.rs

@@ -3,15 +3,14 @@ use redis::Commands;
 use serde::{ Deserialize, Serialize };
 use serde_json;
 // async multi-threaded execution
-use tokio::time::{ error, Duration, Instant };
+use tokio::time::{ Duration, Instant };
 use tokio::sync::mpsc;
 use tokio::join;
 // fatal errors handler
-use core::{panic, time};
+use core::panic;
 // utils
 use std::fmt::Debug;
 use std::fs;
-use std::os::unix::process;
 use std::path::Path;
 use std::process::{ Command, Output };
 use std::sync::Arc;
@@ -22,6 +21,7 @@ use std::io::Write;
 use chrono::{Local, Utc};
 use env_logger::Builder;
 use log::{error, warn, LevelFilter};
+use std::net::{TcpStream, ToSocketAddrs};
 
 static CONFIG_PATH : &'static str = "settings.json";
 
@@ -713,20 +713,20 @@ async fn looped_service_connecting(
         return Err(CustomError::Fatal);
     }
 }
-async fn check_service(host: &str, port: &u32) -> Result<(), CustomError> {
-    let mut command = Command::new("bash");
-    command.args(["service-checker.sh", host, &port.to_string()]);
 
-    match command.output() {
-        Ok(output) => {
-            if output.status.success() {
+// ! have to be rewritten 
+// todo: rewrite use 
+async fn check_service(hostname: &str, port: &u32) -> Result<(), CustomError> {
+    let addr = format!("{}:{}", hostname, port);
+
+    match addr.to_socket_addrs() {
+        Ok(mut addrs) => {
+            if let Some(_) = addrs.find(|a| TcpStream::connect_timeout(a, std::time::Duration::new(1, 0)).is_ok()) {
                 return Ok(());
             } else {
                 return Err(CustomError::Fatal);
             }
         },
-        Err(_) => {
-            return Err(CustomError::Fatal);
-        },
-    };
+        Err(_) => return Err(CustomError::Fatal), 
+    }
 }