1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
use super::Encoding;
use crate::imports::*;
use crate::messages::serde_json::*;
pub use crate::server::result::Result;
use crate::server::Interface;
use crate::server::ProtocolHandler;
use workflow_websocket::server::{
Error as WebSocketError, Message, Result as WebSocketResult, WebSocketSink,
};
pub struct SerdeJsonProtocol<ServerContext, ConnectionContext, Ops, Id>
where
ServerContext: Clone + Send + Sync + 'static,
ConnectionContext: Clone + Send + Sync + 'static,
Ops: OpsT,
Id: IdT,
{
id: PhantomData<Id>,
ops: PhantomData<Ops>,
interface: Arc<Interface<ServerContext, ConnectionContext, Ops>>,
}
#[async_trait]
impl<ServerContext, ConnectionContext, Ops, Id>
ProtocolHandler<ServerContext, ConnectionContext, Ops>
for SerdeJsonProtocol<ServerContext, ConnectionContext, Ops, Id>
where
ServerContext: Clone + Send + Sync + 'static,
ConnectionContext: Clone + Send + Sync + 'static,
Ops: OpsT,
Id: IdT,
{
fn new(interface: Arc<Interface<ServerContext, ConnectionContext, Ops>>) -> Self
where
Self: Sized,
{
SerdeJsonProtocol {
id: PhantomData,
ops: PhantomData,
interface,
}
}
fn encoding(&self) -> Encoding {
Encoding::SerdeJson
}
async fn handle_message(
&self,
connection_ctx: ConnectionContext,
msg: Message,
sink: &WebSocketSink,
) -> WebSocketResult<()> {
let text = &msg.into_text()?;
println!("incoming client message: {text}");
let req: SerdeJsonClientMessage<Ops, Id> =
serde_json::from_str(text).map_err(|_| WebSocketError::MalformedMessage)?;
if req.id.is_some() {
let result = self
.interface
.call_method_with_serde_json(&req.method, connection_ctx, req.params)
.await;
match result {
Ok(payload) => {
if let Ok(msg) = serde_json::to_string(&SerdeJsonServerMessage::new(
req.id,
Some(req.method),
Some(payload),
None,
)) {
if let Err(e) = sink.send(msg.into()) {
log_trace!("Sink error: {:?}", e);
}
}
}
Err(err) => {
if err == ServerError::Close {
return Err(WebSocketError::ServerClose);
} else {
let server_err = SerdeJsonServerError::from(err);
if let Ok(msg) = serde_json::to_string(&SerdeJsonServerMessage::new(
req.id,
Some(req.method),
None,
Some(server_err),
)) {
if let Err(e) = sink.send(msg.into()) {
log_trace!("Sink error: {:?}", e);
}
}
}
}
}
} else {
self.interface
.call_notification_with_serde_json(&req.method, connection_ctx, req.params)
.await
.unwrap_or_else(|err| {
log_trace!("error handling client-side notification {}", err)
});
}
Ok(())
}
fn serialize_notification_message<Msg>(&self, op: Ops, msg: Msg) -> Result<tungstenite::Message>
where
Msg: Serialize + Send + Sync + 'static,
{
create_serialized_notification_message(op, msg)
}
}
pub fn create_serialized_notification_message<Ops, Msg>(op: Ops, msg: Msg) -> Result<Message>
where
Ops: OpsT,
Msg: Serialize + Send + Sync + 'static,
{
let payload = serde_json::to_value(msg)?;
let json = serde_json::to_string(&SerdeJsonServerMessage::<Ops, ()>::new(
None,
Some(op),
Some(payload),
None,
))?;
Ok(Message::Text(json))
}