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hcavarsan / kftray

kubectl port-forward on steroids 🦀 ⚡ kftray makes it easy for you to manage and share multiple k8s port forwards right from your menu bar (or terminal)
https://kftray.app/
GNU General Public License v3.0
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refactor(proxy): optimize buffer usage and enhance connection reliability #127

Closed hcavarsan closed 8 months ago

hcavarsan commented 8 months ago

refactor(proxy): optimize buffer usage and enhance connection reliability

hcavarsan commented 8 months ago

@CodiumAI-Agent /improve --extended

CodiumAI-Agent commented 8 months ago

PR Code Suggestions

Suggestions                                                                                                                                                     
enhancement
Handle potential errors from both client_to_server and server_to_client tasks. ___ **Consider handling the case where client_to_server and server_to_client tasks both return
errors. Currently, if both tasks fail, only the result of the first one to complete is
returned, potentially ignoring a critical error in the other task. You might want to log
both errors or aggregate them into a single error that provides more context about the
failure.** [kftray-server/src/http_proxy.rs [96-132]](https://github.com/hcavarsan/kftray/pull/127/files#diff-e4eb5b99b3c0d7835f4c31dcef4f61dd5a09a32b22d3a9ee6342b11e84a664cbR96-R132) ```diff -tokio::select! { - result = client_to_server => { - match result { - Ok(Ok(())) => { - info!("client_to_server task completed successfully."); - Ok(()) - }, - ... +// Example of handling both errors +let client_to_server_result = client_to_server.await; +let server_to_client_result = server_to_client.await; +match (client_to_server_result, server_to_client_result) { + (Ok(Ok(())), Ok(Ok(()))) => Ok(()), + (Err(e), _) | (_, Err(e)) => Err(e), + ... } ```
Implement a retry mechanism for UDP packet sending to handle temporary network issues. ___ **For better error handling and to avoid dropping UDP packets silently, consider
implementing a retry mechanism or a queue for UDP packets that failed to send. This can
help ensure that temporary network issues do not result in lost data.** [kftray-server/src/udp_over_tcp_proxy.rs [38-43]](https://github.com/hcavarsan/kftray/pull/127/files#diff-9aaf999bbad49c4a406ce42a64b6e98bb2b028025423aec93524147affdbe633R38-R43) ```diff -match udp_socket.send(&buffer) { - Ok(bytes_sent) => debug!("TCP to UDP: Sent {} bytes to UDP socket", bytes_sent), - Err(e) => { - error!("TCP to UDP: Failed to send data to UDP socket: {}", e); - return Err(e); +let mut attempts = 0; +while attempts < MAX_RETRY_ATTEMPTS { + match udp_socket.send(&buffer) { + Ok(bytes_sent) => { + debug!("TCP to UDP: Sent {} bytes to UDP socket", bytes_sent); + break; + } + Err(e) if e.kind() == io::ErrorKind::WouldBlock => { + attempts += 1; + continue; + } + Err(e) => { + error!("TCP to UDP: Failed to send data to UDP socket: {}", e); + return Err(e); + } } } ```
maintainability
Refactor proxy type handling into separate functions for better maintainability. ___ **To improve the maintainability and readability of the main function, consider refactoring
the large match statement for handling different proxy types into separate functions. This
will make the main function cleaner and each proxy setup more modular.** [kftray-server/src/main.rs [60-117]](https://github.com/hcavarsan/kftray/pull/127/files#diff-3bfec0616bce441d6648d23cf8e36682f89bbf5573fea5054cf5b747a3f59c10R60-R117) ```diff match proxy_type.as_str() { - "tcp" => { - info!("Starting TCP proxy..."); - if let Err(e) = tcp_proxy::start_tcp_proxy( - &target_host, - target_port, - ... + "tcp" => start_tcp_proxy(&target_host, target_port, proxy_port, &shutdown_notify), + "udp" => start_udp_proxy(&target_host, target_port, proxy_port, &shutdown_notify), + "http" => start_http_proxy(&target_host, target_port, proxy_port, &shutdown_notify), + _ => { + error!("Unsupported PROXY_TYPE: {}", proxy_type); + exit(1); + }, } ```
best practice
Use ? for error handling instead of expect to avoid potential panics. ___ **To improve error handling and resource management, consider using ? instead of expect for
error-prone operations like try_clone. This way, you can return an error immediately if
the operation fails, preventing potential panics and allowing for cleaner error handling.** [kftray-server/src/tcp_proxy.rs [58-60]](https://github.com/hcavarsan/kftray/pull/127/files#diff-a85662d7b60f15cd96af59cd826b200e1e557e0eb2e7bffb7c6e68d800aac718R58-R60) ```diff let tunnel_reader = tunnel_stream - .try_clone() - .expect("Failed to clone tunnel_stream for reading"); + .try_clone()?; ```
performance
Use non-blocking reads or set timeouts for TCP streams to improve efficiency. ___ **To improve the efficiency and responsiveness of the proxy, consider using non-blocking
reads or setting a timeout for the TCP streams. This can help ensure that the proxy does
not hang indefinitely if a client or server becomes unresponsive.** [kftray-server/src/http_proxy.rs [51-67]](https://github.com/hcavarsan/kftray/pull/127/files#diff-e4eb5b99b3c0d7835f4c31dcef4f61dd5a09a32b22d3a9ee6342b11e84a664cbR51-R67) ```diff -match client_reader.read(&mut buf).await { - Ok(0) => { +// Set a timeout for read operations +match tokio::time::timeout(READ_TIMEOUT, client_reader.read(&mut buf)).await { + Ok(Ok(0)) => { info!("Client stream closed; stopping client_to_server loop."); break; } ... } ```
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CodiumAI-Agent commented 8 months ago

PR Code Suggestions

💡 [best practice]

Consider using expect instead of unwrap_or_else for better error messages.

File: kftray-server/src/main.rs (28-31)

Example code: ___ Existing code: ```python let target_host = env::var("REMOTE_ADDRESS").unwrap_or_else(|_| { error!("REMOTE_ADDRESS not set."); exit(1); }); ``` Improved code: ```python let target_host = env::var("REMOTE_ADDRESS").expect("REMOTE_ADDRESS not set."); ```

💡 [best practice]

Consider using match instead of multiple if let for handling different Result variants.

File: kftray-server/src/main.rs (33-42)

Example code: ___ Existing code: ```python let target_port: u16 = env::var("REMOTE_PORT") .unwrap_or_else(|_| { error!("REMOTE_PORT not set."); exit(1); }) .parse() .unwrap_or_else(|_| { error!("REMOTE_PORT must be a valid port number."); exit(1); }); ``` Improved code: ```python let target_port: u16 = match env::var("REMOTE_PORT") { Ok(val) => match val.parse() { Ok(port) => port, Err(_) => { error!("REMOTE_PORT must be a valid port number."); exit(1); } }, Err(_) => { error!("REMOTE_PORT not set."); exit(1); } }; ```

💡 [best practice]

Consider using match instead of multiple if let for handling different Result variants.

File: kftray-server/src/main.rs (44-53)

Example code: ___ Existing code: ```python let proxy_port: u16 = env::var("LOCAL_PORT") .unwrap_or_else(|_| { error!("LOCAL_PORT not set."); exit(1); }) .parse() .unwrap_or_else(|_| { error!("LOCAL_PORT must be a valid port number."); exit(1); }); ``` Improved code: ```python let proxy_port: u16 = match env::var("LOCAL_PORT") { Ok(val) => match val.parse() { Ok(port) => port, Err(_) => { error!("LOCAL_PORT must be a valid port number."); exit(1); } }, Err(_) => { error!("LOCAL_PORT not set."); exit(1); } }; ```

💡 [best practice]

Consider using if let to handle the Result of tcp_listener.accept().await to avoid unnecessary nesting.

File: kftray-server/src/http_proxy.rs (148-148)

Example code: ___ Existing code: ```python let (client_stream, peer_addr) = tcp_listener.accept().await?; ``` Improved code: ```python if let Ok((client_stream, peer_addr)) = tcp_listener.accept().await { // rest of the code } ```

💡 [best practice]

Consider using if let to handle the Result of TcpStream::connect(&target) to avoid unnecessary nesting.

File: kftray-server/src/tcp_proxy.rs (54-60)

Example code: ___ Existing code: ```python match TcpStream::connect(&target) { Ok(target_stream) => { // rest of the code } Err(e) => { error!("Failed to connect to target: {}", e); } }; ``` Improved code: ```python if let Ok(target_stream) = TcpStream::connect(&target) { // rest of the code } else { error!("Failed to connect to target: {}", e); } ```

💡 [best practice]

Consider using if let to handle the Result of udp_socket.recv(&mut buffer) to avoid unnecessary nesting.

File: kftray-server/src/udp_over_tcp_proxy.rs (56-75)

Example code: ___ Existing code: ```python match udp_socket.recv(&mut buffer) { Ok(size) => { // rest of the code } Err(e) => { // Handling the would block error that is normal for non-blocking IO if e.kind() != io::ErrorKind::WouldBlock { error!("UDP to TCP: Error receiving from UDP socket: {}", e); } break; } } ``` Improved code: ```python if let Ok(size) = udp_socket.recv(&mut buffer) { // rest of the code } else if e.kind() != io::ErrorKind::WouldBlock { error!("UDP to TCP: Error receiving from UDP socket: {}", e); break; } ```
hcavarsan commented 8 months ago

@CodiumAI-Agent /describe