[英]Unable to connect to TCP Server from external machine
我已經在Rust中編寫了一個基本的TCP服務器,但是無法從同一網絡上的另一台計算機訪問它。 這不是網絡問題,因為我也編寫了類似的Python TCP服務器,並且測試客戶端能夠成功連接到該服務器。
use std::io::{Read, Write};
use std::net::{TcpListener, TcpStream};
use std::thread;
use std::str;
fn handle_read(mut stream: TcpStream) {
let mut buf;
// clear out the buffer so we don't send garbage
buf = [0; 512];
// Read and discard any data from the client since this is a read only server.
let _ = match stream.read(&mut buf) {
Err(e) => panic!("Got an error: {}", e),
Ok(m) => m,
};
println!("Got some data");
// Write back the response to the TCP stream
match stream.write("This works!".as_bytes()) {
Err(e) => panic!("Read-Server: Error writing to stream {}", e),
Ok(_) => (),
}
}
pub fn read_server() {
// Create TCP server
let listener = TcpListener::bind("127.0.0.1:6009").unwrap();
println!("Read server listening on port 6009 started, ready to accept");
// Wait for incoming connections and respond accordingly
for stream in listener.incoming() {
match stream {
Err(_) => {
println!("Got an error");
}
Ok(stream) => {
println!("Received a connection");
// Spawn a new thread to respond to the connection request
thread::spawn(move || {
handle_read(stream);
});
}
}
}
}
fn main() {
read_server();
}
let listener = TcpListener::bind("127.0.0.1:6009").unwrap();
如果綁定到127.0.0.1:xxxx
,則套接字只能從localhost接口監聽。 要允許外部連接,請改為綁定到0.0.0.0
,以便它可以接受來自所有網絡接口的連接。
let listener = TcpListener::bind("0.0.0.0:6009").unwrap();
請參閱為什么我要綁定在不同於127.0.0.1的服務器上? 有關詳細信息。
順便說一句,(1)
// not idiomatic
let _ = match stream.read(&mut buf) {
Err(e) => panic!("Got an error: {}", e),
Ok(m) => m,
};
您可以為此使用Result::expect
。
// better
stream.read(&mut buf).expect("Got an error");
(2)
// not idiomatic
match stream.write("This works!".as_bytes()) {
Err(e) => panic!("Read-Server: Error writing to stream {}", e),
Ok(_) => (),
}
而不是"aaa".as_bytes()
您只需編寫b"aaa"
。
// better
stream.write(b"This works!").expect("Read-Server: Error writing to stream");
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