If file exists for port name, serve file

src/main.rs

@@ -1,8 +1,32 @@
 use std::net::{TcpListener, TcpStream, SocketAddr};
 use std::io::Result;
+use std::fs::File;
+use std::io::Write;
+use std::io;
+use std::path::Path;
 
-fn handle_client(stream: TcpStream, addr: SocketAddr) {
+fn handle_client(mut stream: TcpStream, addr: SocketAddr) {
-    println!("Hello, world!");
+    println!("Received connection from {:?}", addr.port());
+    let mut filename = addr.port().to_string();
+    if Path::new(&filename).exists() {
+        let mut buffer = File::open(&filename).unwrap();
+        match io::copy(&mut buffer, &mut stream) {
+            Ok(_written) => (),
+            Err(e) => println!("Failed to file {:?} to TCP stream: {:?}", filename, e),
+        }
+    } else {
+        let mut buffer = File::create(&filename).unwrap();
+        match io::copy(&mut stream, &mut buffer) {
+            Ok(_written) => {
+                filename.push('\n');
+                match stream.write_all(filename.as_bytes()) {
+                    Err(e) => println!("Error writing to socket {:?}", e),
+                    _ => (),
+                }
+            }
+            Err(e) => println!("Failed to write TCP stream to file {:?} failed with {:?}", filename, e),
+        }
+    }
 }
 
 fn main() -> Result<()> {