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
|
use crate::consts::is_ipc_socket;
use crate::consts::WEBSERVER_SOCKET_PATH;
use crate::errors::prelude::*;
use crate::web_server_contract::web_server_contract::InstructionForWebServer as ProtoInstructionForWebServer;
use crate::web_server_contract::web_server_contract::WebServerResponse as ProtoWebServerResponse;
use interprocess::local_socket::Stream as LocalSocketStream;
use prost::Message;
use serde::{Deserialize, Serialize};
use std::fs;
use std::io::{BufWriter, Read, Write};
use std::path::PathBuf;
pub fn shutdown_all_webserver_instances() -> Result<()> {
let entries = fs::read_dir(&*WEBSERVER_SOCKET_PATH)?;
for entry in entries {
let entry = entry?;
let path = entry.path();
if let Some(file_name) = path.file_name() {
if let Some(_file_name_str) = file_name.to_str() {
let metadata = entry.metadata()?;
let file_type = metadata.file_type();
if is_ipc_socket(&file_type) {
match create_webserver_sender(path.to_str().unwrap_or("")) {
Ok(mut sender) => {
let _ = send_webserver_instruction(
&mut sender,
InstructionForWebServer::ShutdownWebServer,
);
},
Err(_) => {
// no-op
},
}
}
}
}
}
Ok(())
}
#[derive(Serialize, Deserialize, Debug, Clone)]
pub enum InstructionForWebServer {
ShutdownWebServer,
QueryVersion,
}
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct VersionInfo {
pub version: String,
pub ip: String,
pub port: u16,
}
#[derive(Serialize, Deserialize, Debug, Clone)]
pub enum WebServerResponse {
Version(VersionInfo),
}
pub fn create_webserver_sender(path: &str) -> Result<BufWriter<LocalSocketStream>> {
let stream = crate::consts::ipc_connect(std::path::Path::new(path))?;
Ok(BufWriter::new(stream))
}
pub fn send_webserver_instruction(
sender: &mut BufWriter<LocalSocketStream>,
instruction: InstructionForWebServer,
) -> Result<()> {
// Convert to protobuf and send with length prefix
let proto_instruction: ProtoInstructionForWebServer = instruction.into();
let encoded = proto_instruction.encode_to_vec();
let len = encoded.len() as u32;
// Write length prefix
sender.write_all(&len.to_le_bytes())?;
// Write protobuf message
sender.write_all(&encoded)?;
sender.flush()?;
Ok(())
}
pub fn discover_webserver_sockets() -> Result<Vec<PathBuf>> {
let mut sockets = Vec::new();
if !WEBSERVER_SOCKET_PATH.exists() {
return Ok(sockets);
}
for entry in fs::read_dir(&*WEBSERVER_SOCKET_PATH)? {
let entry = entry?;
let path = entry.path();
if is_ipc_socket(&entry.metadata()?.file_type()) {
sockets.push(path);
}
}
Ok(sockets)
}
pub fn query_webserver_with_response(
path: &str,
instruction: InstructionForWebServer,
_timeout_ms: u64,
) -> Result<WebServerResponse> {
let mut sender = create_webserver_sender(path)?;
send_webserver_instruction(&mut sender, instruction)?;
let stream = sender.into_inner()?;
receive_webserver_response(stream)
}
fn receive_webserver_response(mut stream: LocalSocketStream) -> Result<WebServerResponse> {
let mut len_bytes = [0u8; 4];
stream.read_exact(&mut len_bytes)?;
let len = u32::from_le_bytes(len_bytes) as usize;
let mut buffer = vec![0u8; len];
stream.read_exact(&mut buffer)?;
let proto_response = ProtoWebServerResponse::decode(&buffer[..])?;
proto_response.try_into()
}
|
