NOTICE sent for parsing errors

Cargo.lock

@@ -158,18 +158,16 @@ checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 
 [[package]]
 name = "futures-core"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88d1c26957f23603395cd326b0ffe64124b818f4449552f960d815cfba83a53d"
+checksum = "629316e42fe7c2a0b9a65b47d159ceaa5453ab14e8f0a3c5eedbb8cd55b4a445"
 
 [[package]]
 name = "futures-macro"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18e4a4b95cea4b4ccbcf1c5675ca7c4ee4e9e75eb79944d07defde18068f79bb"
+checksum = "a89f17b21645bc4ed773c69af9c9a0effd4a3f1a3876eadd453469f8854e7fdd"
 dependencies = [
- "autocfg 1.0.1",
- "proc-macro-hack",
  "proc-macro2",
  "quote",
  "syn",
@@ -177,31 +175,28 @@ dependencies = [
 
 [[package]]
 name = "futures-sink"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36ea153c13024fe480590b3e3d4cad89a0cfacecc24577b68f86c6ced9c2bc11"
+checksum = "996c6442437b62d21a32cd9906f9c41e7dc1e19a9579843fad948696769305af"
 
 [[package]]
 name = "futures-task"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d3d00f4eddb73e498a54394f228cd55853bdf059259e8e7bc6e69d408892e99"
+checksum = "dabf1872aaab32c886832f2276d2f5399887e2bd613698a02359e4ea83f8de12"
 
 [[package]]
 name = "futures-util"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36568465210a3a6ee45e1f165136d68671471a501e632e9a98d96872222b5481"
+checksum = "41d22213122356472061ac0f1ab2cee28d2bac8491410fd68c2af53d1cedb83e"
 dependencies = [
- "autocfg 1.0.1",
  "futures-core",
  "futures-macro",
  "futures-sink",
  "futures-task",
  "pin-project-lite",
  "pin-utils",
- "proc-macro-hack",
- "proc-macro-nested",
  "slab",
 ]
 
@@ -442,18 +437,6 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed0cfbc8191465bed66e1718596ee0b0b35d5ee1f41c5df2189d0fe8bde535ba"
 
-[[package]]
-name = "proc-macro-hack"
-version = "0.5.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
-
-[[package]]
-name = "proc-macro-nested"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc881b2c22681370c6a780e47af9840ef841837bc98118431d4e1868bd0c1086"
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.32"

Cargo.toml

@@ -9,7 +9,7 @@ edition = "2018"
 log = "0.4.14"
 env_logger = "0.9.0"
 tokio = { version = "1.14.0", features = ["full"] }
-futures-util = "0.3.17"
+futures-util = "0.3.18"
 tokio-tungstenite = "0.16.0"
 tungstenite = "0.16.0"
 thiserror = "1.0.30"

src/main.rs

@@ -1,8 +1,10 @@
 use std::{env, io::Error};
 
+//use futures::stream::SplitSink;
 use futures_util::{SinkExt, StreamExt};
 use log::{debug, info, warn};
 use nostr_rs_relay::proto::Proto;
+//use tokio::io::{ReadHalf, WriteHalf};
 use tokio::net::{TcpListener, TcpStream};
 use tokio::runtime::Builder;
 use tokio_tungstenite::WebSocketStream;
@@ -73,6 +75,7 @@ async fn nostr_server(stream: TcpStream) {
 async fn process_client(stream: WebSocketStream<TcpStream>) {
     // get a protocol helper;
     let mut proto = Proto::new();
+    // futures::stream::Stream?
     let (mut write, mut read) = stream.split();
     // TODO: select on a timeout to kill non-responsive clients
 
@@ -91,7 +94,20 @@ async fn process_client(stream: WebSocketStream<TcpStream>) {
                     .await
                     .expect("send failed");
                 // Handle this request. Everything else below is basically websocket error handling.
-                proto.process_message(cmd).ok();
+                let proto_error = proto.process_message(cmd);
+                match proto_error {
+                    Err(_) => {
+                        write
+                            .send(Message::Text(
+                                "[\"NOTICE\", \"Failed to process message.\"]".to_owned(),
+                            ))
+                            .await
+                            .expect("send failed");
+                    }
+                    Ok(_) => {
+                        info!("Message processed successfully");
+                    }
+                }
             }
             Ok(Message::Binary(_)) => {
                 info!("Ignoring Binary message");

src/proto.rs

@@ -27,7 +27,7 @@ impl Proto {
         p
     }
 
-    // TODO: figure out NOTICE handling for errors here
+    // Error results will be transformed into client NOTICEs
     pub fn process_message(&mut self, cmd: String) -> Result<()> {
         info!(
             "Processing message in proto for client: {:?}",