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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
mod msg;
mod stdio;
mod error;
mod socket;
mod req_queue;
use std::net::{TcpStream, ToSocketAddrs};
use crossbeam_channel::{Receiver, Sender};
pub use crate::{
error::ProtocolError,
msg::{ErrorCode, Message, Notification, Request, RequestId, Response, ResponseError},
req_queue::{Incoming, Outgoing, ReqQueue},
stdio::IoThreads,
};
pub struct Connection {
pub sender: Sender<Message>,
pub receiver: Receiver<Message>,
}
impl Connection {
pub fn stdio() -> (Connection, IoThreads) {
let (sender, receiver, io_threads) = stdio::stdio_transport();
(Connection { sender, receiver }, io_threads)
}
pub fn socket<A: ToSocketAddrs>(addr: A) -> (Connection, IoThreads) {
let stream = TcpStream::connect(addr).expect("Couldn't connect to the server...");
let (sender, receiver, io_threads) = socket::socket_transport(stream);
(Connection { sender, receiver }, io_threads)
}
pub fn memory() -> (Connection, Connection) {
let (s1, r1) = crossbeam_channel::unbounded();
let (s2, r2) = crossbeam_channel::unbounded();
(Connection { sender: s1, receiver: r2 }, Connection { sender: s2, receiver: r1 })
}
pub fn initialize_start(&self) -> Result<(RequestId, serde_json::Value), ProtocolError> {
loop {
match self.receiver.recv() {
Ok(Message::Request(req)) => {
if req.is_initialize() {
return Ok((req.id, req.params));
} else {
let resp = Response::new_err(
req.id.clone(),
ErrorCode::ServerNotInitialized as i32,
format!("expected initialize request, got {:?}", req),
);
self.sender.send(resp.into()).unwrap();
}
}
msg => {
return Err(ProtocolError(format!(
"expected initialize request, got {:?}",
msg
)))
}
};
}
}
pub fn initialize_finish(
&self,
initialize_id: RequestId,
initialize_result: serde_json::Value,
) -> Result<(), ProtocolError> {
let resp = Response::new_ok(initialize_id, initialize_result);
self.sender.send(resp.into()).unwrap();
match &self.receiver.recv() {
Ok(Message::Notification(n)) if n.is_initialized() => (),
m => {
return Err(ProtocolError(format!(
"expected initialized notification, got {:?}",
m
)))
}
}
Ok(())
}
pub fn initialize(
&self,
server_capabilities: serde_json::Value,
) -> Result<serde_json::Value, ProtocolError> {
let (id, params) = self.initialize_start()?;
let initialize_data = serde_json::json!({
"capabilities": server_capabilities,
});
self.initialize_finish(id, initialize_data)?;
Ok(params)
}
pub fn handle_shutdown(&self, req: &Request) -> Result<bool, ProtocolError> {
if !req.is_shutdown() {
return Ok(false);
}
let resp = Response::new_ok(req.id.clone(), ());
let _ = self.sender.send(resp.into());
match &self.receiver.recv_timeout(std::time::Duration::from_secs(30)) {
Ok(Message::Notification(n)) if n.is_exit() => (),
m => return Err(ProtocolError(format!("unexpected message during shutdown: {:?}", m))),
}
Ok(true)
}
}