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TCP Client in Rust
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#![allow(unused_variables)] | |
#![allow(unused_imports)] | |
use std::env; | |
use std::process; | |
use std::thread; | |
use std::io::{self, Read, Write, Error}; | |
use std::net::TcpStream; | |
use std::net::TcpListener; | |
type Port = u16; | |
struct Program { | |
name: String | |
} | |
impl Program { | |
fn new(name: String) -> Program { | |
Program { name: name } | |
} | |
fn usage(&self) { | |
println!("usage: {} HOST PORT",self.name); | |
} | |
fn print_error(&self,mesg: String) { | |
writeln!(io::stderr(),"{}: error: {}",self.name,mesg); | |
} | |
fn print_fail(&self,mesg: String) -> ! { | |
self.print_error(mesg); | |
self.fail(); | |
} | |
fn exit(&self,status: i32) -> ! { process::exit(status); } | |
fn fail(&self) -> ! { self.exit(-1); } | |
} | |
fn main() { | |
let mut args = env::args(); | |
let program = Program::new( | |
args.next().unwrap_or("test".to_string()) | |
); | |
let host = args.next().unwrap_or_else(|| { | |
program.usage(); | |
program.fail(); | |
}); | |
let port = args.next().unwrap_or_else(|| { | |
program.usage(); | |
program.fail(); | |
}).parse::<Port>().unwrap_or_else(|error| { | |
program.print_error(format!("invalid port number: {}",error)); | |
program.usage(); | |
program.fail(); | |
}); | |
let mut stream = TcpStream::connect( | |
(host.as_str(), port) | |
).unwrap_or_else(|error| | |
program.print_fail(error.to_string()) | |
); | |
let mut input_stream = stream.try_clone().unwrap(); | |
let handler = thread::spawn(move || { | |
let mut client_buffer = [0u8; 1024]; | |
loop { | |
match input_stream.read(&mut client_buffer) { | |
Ok(n) => { | |
if n == 0 { | |
program.exit(0); | |
} | |
else | |
{ | |
io::stdout().write(&client_buffer).unwrap(); | |
io::stdout().flush().unwrap(); | |
} | |
}, | |
Err(error) => program.print_fail(error.to_string()), | |
} | |
} | |
}); | |
let output_stream = &mut stream; | |
let mut user_buffer = String::new(); | |
loop { | |
io::stdin().read_line(&mut user_buffer).unwrap(); | |
output_stream.write(user_buffer.as_bytes()).unwrap(); | |
output_stream.flush().unwrap(); | |
} | |
} |
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