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@ -1,30 +1,62 @@
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use gophermap::{GopherMenu, ItemType};
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use std::{
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fs,
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io::prelude::*,
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io::{BufReader, Read, Write},
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net::{TcpListener, TcpStream, ToSocketAddrs},
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net::{TcpListener, TcpStream},
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path::PathBuf,
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};
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use threadpool::ThreadPool;
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type Result<T> = std::result::Result<T, Box<dyn std::error::Error + Send + Sync>>;
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const MAX_WORKERS: usize = 10;
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const MAX_PEEK_SIZE: usize = 1024;
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#[derive(Default)]
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pub type Result<T> = std::result::Result<T, Box<dyn std::error::Error + Send + Sync>>;
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pub struct Request {
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selector: String, // client info
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root: String, // server info
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stream: TcpStream,
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selector: String,
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root: String,
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host: String,
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port: String,
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}
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/// Starts a Gopher server at the specified root directory.
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pub fn start(host: &str, port: &str, root_dir: &str) -> Result<()> {
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let addr = format!("{}:{}", host, port);
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let listener = TcpListener::bind(&addr)?;
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println!("-> Listening at {}", addr);
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let pool = ThreadPool::new(MAX_WORKERS);
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for stream in listener.incoming() {
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let stream = stream?;
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println!("-> Connection from: {}", stream.peer_addr()?);
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let mut req = Request::from(
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stream,
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root_dir.to_string(),
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host.to_string(),
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port.to_string(),
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);
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pool.execute(move || {
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if let Err(e) = req.serve() {
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eprintln!("-> {}", e);
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}
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});
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}
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Ok(())
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}
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impl Request {
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pub fn new() -> Request {
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Default::default()
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pub fn from(stream: TcpStream, root: String, host: String, port: String) -> Request {
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Request {
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stream,
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root,
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host,
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port,
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selector: String::new(),
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}
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}
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pub fn root_path_string(&self) -> Result<String> {
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pub fn root_path_as_string(&self) -> Result<String> {
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Ok(fs::canonicalize(&self.root)?.to_string_lossy().to_string())
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}
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@ -34,114 +66,103 @@ impl Request {
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Ok(path)
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}
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pub fn path_string(&self) -> Result<String> {
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let path = self.path()?;
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Ok(path.to_string_lossy().to_string())
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pub fn path_as_string(&self) -> Result<String> {
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let mut path = self
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.path()?
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.to_string_lossy()
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.to_string()
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.replace(&self.root_path_as_string()?, "");
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if !path.ends_with('/') {
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path.push('/');
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}
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Ok(path)
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}
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}
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pub fn start(addr: impl ToSocketAddrs, root: &str) -> Result<()> {
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let listener = TcpListener::bind(addr)?;
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let pool = ThreadPool::new(4);
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let local_addr = listener.local_addr()?;
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let host = local_addr.ip();
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let port = local_addr.port();
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for stream in listener.incoming() {
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let stream = stream?;
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println!("-> Connection from: {}", stream.peer_addr()?);
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let req = Request {
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root: root.to_string(),
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host: host.to_string(),
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port: port.to_string(),
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..Default::default()
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};
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pool.execute(|| {
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if let Err(e) = client_loop(stream, req) {
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eprintln!("-> {}", e);
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}
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});
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/// Reads from the client and responds.
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fn serve(&mut self) -> Result<()> {
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let reader = BufReader::new(&self.stream);
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let mut lines = reader.lines();
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if let Some(Ok(line)) = lines.next() {
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println!("-> Received: {:?}", line);
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self.selector = line;
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self.respond()?;
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}
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Ok(())
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}
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Ok(())
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}
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fn client_loop(stream: TcpStream, mut req: Request) -> Result<()> {
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let reader = BufReader::new(&stream);
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let mut lines = reader.lines();
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if let Some(Ok(line)) = lines.next() {
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println!("-> client sent: {:?}", line);
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req.selector = line;
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respond(stream, req)?;
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/// Respond to a client's request.
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fn respond(&mut self) -> Result<()> {
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let md = fs::metadata(self.path()?)?;
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if md.is_file() {
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self.send_text()
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} else if md.is_dir() {
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self.send_dir()
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} else {
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Ok(())
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}
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}
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Ok(())
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}
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fn respond(stream: TcpStream, req: Request) -> Result<()> {
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let md = fs::metadata(req.path()?)?;
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if md.is_file() {
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send_text(stream, req)
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} else if md.is_dir() {
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send_dir(stream, req)
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} else {
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/// Send a directory listing (menu) to the client.
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fn send_dir(&mut self) -> Result<()> {
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let mut dir = fs::read_dir(self.path()?)?;
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let mut menu = GopherMenu::with_write(&self.stream);
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let path = self.path_as_string()?;
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while let Some(Ok(entry)) = dir.next() {
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let mut path = path.clone();
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let file_name = entry.file_name();
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path.push_str(&file_name.to_string_lossy());
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menu.write_entry(
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file_type(&entry),
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&file_name.to_string_lossy(),
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&path,
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&self.host,
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self.port.parse()?,
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)?;
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}
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menu.end()?;
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Ok(())
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}
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}
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fn send_dir(mut stream: TcpStream, req: Request) -> Result<()> {
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let mut response = String::new();
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let mut dir = fs::read_dir(req.path()?)?;
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let mut path = req.path_string()?.replace(&req.root_path_string()?, "");
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if !path.ends_with('/') {
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path.push('/');
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}
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while let Some(Ok(entry)) = dir.next() {
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let file_type = file_type(&entry);
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let f = entry.file_name();
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let file_name = f.to_string_lossy();
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response.push_str(&format!(
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"{}{}\t{}{}\tlocalhost\t7070\r\n",
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file_type, file_name, path, file_name,
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));
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/// Send a text document to the client.
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fn send_text(&mut self) -> Result<()> {
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let path = self.path()?;
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let md = fs::metadata(&path)?;
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let mut f = fs::File::open(&path)?;
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let mut buf = [0; 1024];
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let mut bytes = md.len();
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while bytes > 0 {
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let n = f.read(&mut buf[..])?;
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bytes -= n as u64;
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self.stream.write_all(&buf[..n])?;
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}
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self.stream.write_all(b"\r\n.\r\n")?; // end gopher response
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Ok(())
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}
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stream.write_all(response.as_bytes())?;
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stream.write_all(b"\r\n.\r\n")?; // end gopher response
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Ok(())
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}
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fn send_text(mut stream: TcpStream, req: Request) -> Result<()> {
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let path = req.path()?;
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let md = fs::metadata(&path)?;
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let mut f = fs::File::open(&path)?;
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let mut buf = [0; 1024];
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let mut bytes = md.len();
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while bytes > 0 {
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let n = f.read(&mut buf[..])?;
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bytes -= n as u64;
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stream.write_all(&buf)?;
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/// Determine the gopher type for a DirEntry on disk.
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fn file_type(dir: &fs::DirEntry) -> ItemType {
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let metadata = dir.metadata();
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if metadata.is_err() {
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return ItemType::Error;
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}
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stream.write_all(b"\r\n.\r\n")?; // end gopher response
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Ok(())
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}
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let metadata = metadata.unwrap();
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fn file_type(dir: &fs::DirEntry) -> char {
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if let Ok(metadata) = dir.metadata() {
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if metadata.is_file() {
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if let Ok(file) = fs::File::open(&dir.path()) {
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let mut buffer: Vec<u8> = vec![];
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let _ = file.take(MAX_PEEK_SIZE as u64).read_to_end(&mut buffer);
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if content_inspector::inspect(&buffer).is_binary() {
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'9'
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} else {
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'0'
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}
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if metadata.is_file() {
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if let Ok(file) = fs::File::open(&dir.path()) {
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let mut buffer: Vec<u8> = vec![];
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let _ = file.take(MAX_PEEK_SIZE as u64).read_to_end(&mut buffer);
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if content_inspector::inspect(&buffer).is_binary() {
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ItemType::Binary
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} else {
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'9'
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ItemType::File
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}
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} else if metadata.is_dir() {
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'1'
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} else {
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'3'
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ItemType::Binary
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}
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} else if metadata.is_dir() {
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ItemType::Directory
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} else {
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'3'
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ItemType::Error
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}
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}
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dvkt
4 years ago