Made it work

tokiounixsocket/Cargo.lock

@@ -11,6 +11,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "bytes"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4872d67bab6358e59559027aa3b9157c53d9358c51423c17554809a8858e0f8"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -32,6 +38,12 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
+
 [[package]]
 name = "mio"
 version = "0.8.0"
@@ -134,7 +146,9 @@ version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2af73ac49756f3f7c01172e34a23e5d0216f6c32333757c2c61feb2bbff5a5ee"
 dependencies = [
+ "bytes",
  "libc",
+ "memchr",
  "mio",
  "pin-project-lite",
  "socket2",

tokiounixsocket/Cargo.toml

@@ -8,4 +8,4 @@ edition = "2021"
 [dependencies]
 bincode = "1.3.3"
 serde = { version = "1.0.136", features = ["derive"] }
-tokio = { version = "1.17.0", features = ["rt", "sync", "net", "macros"] }
+tokio = { version = "1.17.0", features = ["rt", "sync", "net", "macros", "io-util"] }

tokiounixsocket/src/main.rs

@@ -1,6 +1,8 @@
 use std::io;
 use std::path::Path;
 
+use tokio::io::AsyncReadExt;
+use tokio::io::AsyncWriteExt;
 use tokio::io::Interest;
 use tokio::net::UnixListener;
 use tokio::net::UnixStream;
@@ -14,6 +16,7 @@ enum Message {
 #[tokio::main(flavor = "current_thread")]
 async fn main() {
     let path = Path::new("./comm.socket");
+    let _ = std::fs::remove_file(&path);
 
     // producer
     let path_prod = path.to_path_buf();
@@ -21,9 +24,9 @@ async fn main() {
         let listener = UnixListener::bind(&path_prod).unwrap();
         loop {
             match listener.accept().await {
-                Ok((stream, _addr)) => {
+                Ok((mut stream, _addr)) => {
                     println!("Client here");
-                    tokio::spawn(async move { send_to_consumer(&stream).await })
+                    tokio::spawn(async move { send_to_consumer(&mut stream).await })
                 }
                 Err(e) => {
                     println!("Erro! {:?}", e);
@@ -36,26 +39,37 @@ async fn main() {
     // consumer
     let path_cons = path.to_path_buf();
     let consumer = tokio::spawn(async move {
-        let socket = UnixStream::connect(&path_cons).await.unwrap();
+        let mut socket = UnixStream::connect(&path_cons).await.unwrap();
         loop {
             let ready = socket.ready(Interest::READABLE).await.unwrap();
             if ready.is_readable() {
-                let mut data = [0; 1024];
-                match socket.try_read(&mut data) {
-                    Ok(n) => {
-                        println!("Read {} bytes", n);
-                        let message: Result<Message, Box<bincode::ErrorKind>> =
-                            bincode::deserialize(&data[..n]);
-                        match message {
-                            Ok(the_message) => println!("Message: {:?}", the_message),
-                            Err(e) => println!("Deserialized message: {:?}", e),
+                let size = socket.read_u64().await.unwrap();
+                println!("Content length: {}", size as usize);
+
+                let mut record = vec![0u8; size as usize];
+                loop {
+                    match socket.read_exact(&mut record).await {
+                        Ok(0) => {
+                            tokio::task::yield_now().await;
+                            continue;
+                        }
+                        Ok(n) => {
+                            println!("Read {} bytes: {:?}", n, record);
+                            let message: Result<Message, Box<bincode::ErrorKind>> =
+                                bincode::deserialize(&record);
+                            match message {
+                                Ok(the_message) => println!("Message: {:?}", the_message),
+                                Err(e) => println!("Deserialized message: {:?}", e),
+                            }
+                            break;
+                        }
+                        Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
+                            break;
+                        }
+                        Err(e) => {
+                            println!("Read error: {:?}", e);
+                            break;
                         }
-                    }
-                    Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
-                        continue;
-                    }
-                    Err(e) => {
-                        println!("Error reading: {:?}", e);
                     }
                 }
             }
@@ -66,7 +80,7 @@ async fn main() {
     let _ = tokio::join!(producer, consumer);
 }
 
-async fn send_to_consumer(stream: &UnixStream) {
+async fn send_to_consumer(stream: &mut UnixStream) {
     let mut should_yield = false;
     let mut seq = 0;
     loop {
@@ -78,12 +92,17 @@ async fn send_to_consumer(stream: &UnixStream) {
         seq += 1;
 
         let encoded = bincode::serialize(&message).unwrap();
+        let len = encoded.len();
 
         let ready = stream.ready(Interest::WRITABLE).await.unwrap();
         if ready.is_writable() {
+            // Header, with the size
+            stream.write_u64(len as u64).await.unwrap();
+
+            // The content
             match stream.try_write(&encoded) {
                 Ok(n) => println!("Wrote {} bytes: {:?}", n, encoded),
-                Err(e) => println!("Error: {:?}", e),
+                Err(e) => println!("Write error: {:?}", e),
             }
 
             should_yield = !should_yield;