|
1
|
use super::commands::{ImapCommand, ImapCommandHandler, ImapResponse}; |
|
2
|
use super::mailbox::MailboxStore; |
|
3
|
use super::state::ImapState; |
|
4
|
use tokio::io::{AsyncRead, AsyncWrite}; |
|
5
|
use tokio_util::codec::{Framed, LinesCodec}; |
|
6
|
use futures::StreamExt; |
|
7
|
use futures::SinkExt; |
|
8
|
|
|
9
|
pub struct ImapSession { |
|
10
|
state: ImapState, |
|
11
|
handler: ImapCommandHandler, |
|
12
|
} |
|
13
|
|
|
14
|
impl ImapSession { |
|
15
|
pub fn new(store: MailboxStore) -> Self { |
|
16
|
ImapSession { |
|
17
|
state: ImapState::NotAuthenticated, |
|
18
|
handler: ImapCommandHandler::new(store), |
|
19
|
} |
|
20
|
} |
|
21
|
|
|
22
|
pub async fn handle<S>(&mut self, stream: S) -> anyhow::Result<()> |
|
23
|
where |
|
24
|
S: AsyncRead + AsyncWrite + Unpin, |
|
25
|
{ |
|
26
|
let mut framed = Framed::new(stream, LinesCodec::new()); |
|
27
|
|
|
28
|
// Send greeting |
|
29
|
framed.send("* OK IMAP4rev1 Server Ready".to_string()).await?; |
|
30
|
|
|
31
|
while let Some(line_result) = framed.next().await { |
|
32
|
let line = line_result?; |
|
33
|
|
|
34
|
tracing::debug!("IMAP received: {}", line); |
|
35
|
|
|
36
|
// Parse command |
|
37
|
let cmd = match ImapCommand::parse(&line) { |
|
38
|
Ok(cmd) => cmd, |
|
39
|
Err(e) => { |
|
40
|
let response = ImapResponse::bad("*".to_string(), format!("Parse error: {}", e)); |
|
41
|
framed.send(response.format().trim_end().to_string()).await?; |
|
42
|
continue; |
|
43
|
} |
|
44
|
}; |
|
45
|
|
|
46
|
// Handle command |
|
47
|
let responses = self.handle_command(&cmd); |
|
48
|
|
|
49
|
// Send responses |
|
50
|
for response in responses { |
|
51
|
let formatted = response.format(); |
|
52
|
tracing::debug!("IMAP sending: {}", formatted.trim_end()); |
|
53
|
framed.send(formatted.trim_end().to_string()).await?; |
|
54
|
} |
|
55
|
|
|
56
|
// Check if we should logout |
|
57
|
if self.state == ImapState::Logout { |
|
58
|
break; |
|
59
|
} |
|
60
|
} |
|
61
|
|
|
62
|
Ok(()) |
|
63
|
} |
|
64
|
|
|
65
|
fn handle_command(&mut self, cmd: &ImapCommand) -> Vec<ImapResponse> { |
|
66
|
match cmd.command.as_str() { |
|
67
|
"CAPABILITY" => self.handler.handle_capability(cmd), |
|
68
|
"LOGIN" => self.handler.handle_login(cmd, &mut self.state), |
|
69
|
"LIST" | "LSUB" => self.handler.handle_list(cmd, &self.state), |
|
70
|
"SELECT" => self.handler.handle_select(cmd, &mut self.state, false), |
|
71
|
"EXAMINE" => self.handler.handle_examine(cmd, &mut self.state), |
|
72
|
"FETCH" => self.handler.handle_fetch(cmd, &self.state), |
|
73
|
"SEARCH" => self.handler.handle_search(cmd, &self.state), |
|
74
|
"STATUS" => self.handler.handle_status(cmd, &self.state), |
|
75
|
"LOGOUT" => self.handler.handle_logout(cmd, &mut self.state), |
|
76
|
"NOOP" => self.handler.handle_noop(cmd), |
|
77
|
_ => vec![ImapResponse::bad( |
|
78
|
cmd.tag.clone(), |
|
79
|
format!("Unknown command: {}", cmd.command), |
|
80
|
)], |
|
81
|
} |
|
82
|
} |
|
83
|
} |