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
199
200
201
202
203
204
205
|
use std::io::{BufRead, Write};
use lsp_types::{notification::Notification, request::Request};
use serde::{Deserialize, Serialize};
use serde_json::{from_str, from_value, to_string, to_value, Value};
use crate::Result;
#[derive(Serialize, Deserialize, Debug, Clone)]
#[serde(untagged)]
pub enum RawMessage {
Request(RawRequest),
Notification(RawNotification),
Response(RawResponse),
}
impl From<RawRequest> for RawMessage {
fn from(raw: RawRequest) -> RawMessage {
RawMessage::Request(raw)
}
}
impl From<RawNotification> for RawMessage {
fn from(raw: RawNotification) -> RawMessage {
RawMessage::Notification(raw)
}
}
impl From<RawResponse> for RawMessage {
fn from(raw: RawResponse) -> RawMessage {
RawMessage::Response(raw)
}
}
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct RawRequest {
pub id: u64,
pub method: String,
pub params: Value,
}
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct RawResponse {
// JSON RPC allows this to be null if it was impossible
// to decode the request's id. Ignore this special case
// and just die horribly.
pub id: u64,
#[serde(skip_serializing_if = "Option::is_none")]
pub result: Option<Value>,
#[serde(skip_serializing_if = "Option::is_none")]
pub error: Option<RawResponseError>,
}
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct RawResponseError {
pub code: i32,
pub message: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub data: Option<Value>,
}
#[derive(Clone, Copy, Debug)]
#[allow(unused)]
pub enum ErrorCode {
ParseError = -32700,
InvalidRequest = -32600,
MethodNotFound = -32601,
InvalidParams = -32602,
InternalError = -32603,
ServerErrorStart = -32099,
ServerErrorEnd = -32000,
ServerNotInitialized = -32002,
UnknownErrorCode = -32001,
RequestCanceled = -32800,
ContentModified = -32801,
}
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct RawNotification {
pub method: String,
pub params: Value,
}
impl RawMessage {
pub fn read(r: &mut impl BufRead) -> Result<Option<RawMessage>> {
let text = match read_msg_text(r)? {
None => return Ok(None),
Some(text) => text,
};
let msg = from_str(&text)?;
Ok(Some(msg))
}
pub fn write(self, w: &mut impl Write) -> Result<()> {
#[derive(Serialize)]
struct JsonRpc {
jsonrpc: &'static str,
#[serde(flatten)]
msg: RawMessage,
}
let text = to_string(&JsonRpc { jsonrpc: "2.0", msg: self })?;
write_msg_text(w, &text)?;
Ok(())
}
}
impl RawRequest {
pub fn new<R>(id: u64, params: &R::Params) -> RawRequest
where
R: Request,
R::Params: serde::Serialize,
{
RawRequest { id, method: R::METHOD.to_string(), params: to_value(params).unwrap() }
}
pub fn cast<R>(self) -> ::std::result::Result<(u64, R::Params), RawRequest>
where
R: Request,
R::Params: serde::de::DeserializeOwned,
{
if self.method != R::METHOD {
return Err(self);
}
let id = self.id;
let params: R::Params = from_value(self.params).unwrap();
Ok((id, params))
}
}
impl RawResponse {
pub fn ok<R>(id: u64, result: &R::Result) -> RawResponse
where
R: Request,
R::Result: serde::Serialize,
{
RawResponse { id, result: Some(to_value(&result).unwrap()), error: None }
}
pub fn err(id: u64, code: i32, message: String) -> RawResponse {
let error = RawResponseError { code, message, data: None };
RawResponse { id, result: None, error: Some(error) }
}
}
impl RawNotification {
pub fn new<N>(params: &N::Params) -> RawNotification
where
N: Notification,
N::Params: serde::Serialize,
{
RawNotification { method: N::METHOD.to_string(), params: to_value(params).unwrap() }
}
pub fn is<N>(&self) -> bool
where
N: Notification,
{
self.method == N::METHOD
}
pub fn cast<N>(self) -> ::std::result::Result<N::Params, RawNotification>
where
N: Notification,
N::Params: serde::de::DeserializeOwned,
{
if !self.is::<N>() {
return Err(self);
}
Ok(from_value(self.params).unwrap())
}
}
fn read_msg_text(inp: &mut impl BufRead) -> Result<Option<String>> {
let mut size = None;
let mut buf = String::new();
loop {
buf.clear();
if inp.read_line(&mut buf)? == 0 {
return Ok(None);
}
if !buf.ends_with("\r\n") {
Err(format!("malformed header: {:?}", buf))?;
}
let buf = &buf[..buf.len() - 2];
if buf.is_empty() {
break;
}
let mut parts = buf.splitn(2, ": ");
let header_name = parts.next().unwrap();
let header_value = parts.next().ok_or_else(|| format!("malformed header: {:?}", buf))?;
if header_name == "Content-Length" {
size = Some(header_value.parse::<usize>()?);
}
}
let size = size.ok_or("no Content-Length")?;
let mut buf = buf.into_bytes();
buf.resize(size, 0);
inp.read_exact(&mut buf)?;
let buf = String::from_utf8(buf)?;
log::debug!("< {}", buf);
Ok(Some(buf))
}
fn write_msg_text(out: &mut impl Write, msg: &str) -> Result<()> {
log::debug!("> {}", msg);
write!(out, "Content-Length: {}\r\n\r\n", msg.len())?;
out.write_all(msg.as_bytes())?;
out.flush()?;
Ok(())
}
|
