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Always pass port to jsonrpsee WebSocket client #2339

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62 changes: 55 additions & 7 deletions client/relay-chain-rpc-interface/src/reconnecting_ws_client.rs
Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,18 @@ pub struct ReconnectingWsClient {
to_worker_channel: TokioSender<RpcDispatcherMessage>,
}

/// Format url and force addition of a port
fn url_to_string_with_port(url: Url) -> Option<String> {
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Why don't you just use set_port?

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set_port checks internally and drops the port if it is the default one. Basically the url standard says that the port should be null if it is the default one. jsonrpsee behaves out of line here.

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Can we not just fix jsonrpsee?

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@skunert skunert Mar 16, 2023

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We can, this is a quick fix to make it work for now. But yeah I will open an issue 👍

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Opened an issue about this, paritytech/jsonrpsee#1048.

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@bkchr can we go forward with this? If this gets changed in jsonrpsee I will adjust here again, but for now this is an easy fix and I would like to have this functionality working asap.

Some(format!(
"{}://{}:{}{}{}",
url.scheme(),
url.host_str()?,
url.port_or_known_default()?,
url.path(),
url.query().map(|query| format!("?{}", query)).unwrap_or_default()
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))
}

impl ReconnectingWsClient {
/// Create a new websocket client frontend.
pub async fn new(urls: Vec<Url>, task_manager: &mut TaskManager) -> RelayChainResult<Self> {
Expand Down Expand Up @@ -144,7 +156,7 @@ impl ReconnectingWsClient {

/// Worker that should be used in combination with [`RelayChainRpcClient`]. Must be polled to distribute header notifications to listeners.
struct ReconnectingWebsocketWorker {
ws_urls: Vec<Url>,
ws_urls: Vec<String>,
/// Communication channel with the RPC client
client_receiver: TokioReceiver<RpcDispatcherMessage>,

Expand Down Expand Up @@ -176,7 +188,7 @@ fn distribute_header(header: RelayHeader, senders: &mut Vec<Sender<RelayHeader>>
/// and reconnections.
#[derive(Debug)]
struct ClientManager {
urls: Vec<Url>,
urls: Vec<String>,
active_client: Arc<JsonRpcClient>,
active_index: usize,
}
Expand All @@ -189,7 +201,7 @@ struct RelayChainSubscriptions {

/// Try to find a new RPC server to connect to.
async fn connect_next_available_rpc_server(
urls: &Vec<Url>,
urls: &Vec<String>,
starting_position: usize,
) -> Result<(usize, Arc<JsonRpcClient>), ()> {
tracing::debug!(target: LOG_TARGET, starting_position, "Connecting to RPC server.");
Expand All @@ -198,18 +210,19 @@ async fn connect_next_available_rpc_server(
tracing::info!(
target: LOG_TARGET,
index,
?url,
url,
"Trying to connect to next external relaychain node.",
);
if let Ok(ws_client) = WsClientBuilder::default().build(url).await {
return Ok((index, Arc::new(ws_client)))
match WsClientBuilder::default().build(&url).await {
Ok(ws_client) => return Ok((index, Arc::new(ws_client))),
Err(err) => tracing::debug!(target: LOG_TARGET, url, ?err, "Unable to connect."),
};
}
Err(())
}

impl ClientManager {
pub async fn new(urls: Vec<Url>) -> Result<Self, ()> {
pub async fn new(urls: Vec<String>) -> Result<Self, ()> {
if urls.is_empty() {
return Err(())
}
Expand Down Expand Up @@ -325,6 +338,8 @@ impl ReconnectingWebsocketWorker {
async fn new(
urls: Vec<Url>,
) -> (ReconnectingWebsocketWorker, TokioSender<RpcDispatcherMessage>) {
let urls = urls.into_iter().filter_map(url_to_string_with_port).collect();
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This silently drops urls without a port.

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I mean either the url has a user-provided port or we use the default. If the URL has no host, it fails at initial parsing already. So this should never filter something out. I will add a log message in that case however, since filtering out anything would be undesired (but passing it on is also undesired since jsonrpsee will also not take it without a port).


let (tx, rx) = tokio_channel(100);
let worker = ReconnectingWebsocketWorker {
ws_urls: urls,
Expand Down Expand Up @@ -518,3 +533,36 @@ impl ReconnectingWebsocketWorker {
}
}
}

#[cfg(test)]
mod test {
use super::url_to_string_with_port;
use url::Url;

#[test]
fn url_to_string_works() {
let url = Url::parse("wss://something/path").unwrap();
assert_eq!(Some("wss://something:443/path".to_string()), url_to_string_with_port(url));

let url = Url::parse("ws://something/path").unwrap();
assert_eq!(Some("ws://something:80/path".to_string()), url_to_string_with_port(url));

let url = Url::parse("wss://something:100/path").unwrap();
assert_eq!(Some("wss://something:100/path".to_string()), url_to_string_with_port(url));

let url = Url::parse("wss://something:100/path").unwrap();
assert_eq!(Some("wss://something:100/path".to_string()), url_to_string_with_port(url));

let url = Url::parse("wss://something/path?query=yes").unwrap();
assert_eq!(
Some("wss://something:443/path?query=yes".to_string()),
url_to_string_with_port(url)
);

let url = Url::parse("wss://something:9090/path?query=yes").unwrap();
assert_eq!(
Some("wss://something:9090/path?query=yes".to_string()),
url_to_string_with_port(url)
);
}
}