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|
use constants::{MessageType, MAX_MESSAGE_LENGTH};
use std::io;
#[deriving(PartialEq, Eq, Show)]
pub struct Message {
from: Option<String>,
message_type: MessageType,
params: Vec<String>,
}
impl Message {
pub fn new (from: Option<String>, message_type: MessageType, params: Vec<String>) -> Message {
Message { from: from, message_type: message_type, params: params }
}
pub fn parse (msg: &str) -> Result<Message, &'static str> {
if msg.len() > MAX_MESSAGE_LENGTH {
return Err("message too long");
}
let message_parser = regex!(r"^(?::([^ ]+) )?([A-Z]+|[0-9]{3}) ([^\r\n\0]*)\r\n$");
match message_parser.captures(msg) {
Some(captures) => {
let from = captures.at(1);
let from = if from.len() > 0 { Some(from.to_string()) } else { None };
let command = captures.at(2);
let params = Message::parse_params(captures.at(3));
match from_str(command) {
Some(c) => Ok(Message::new(from, c, params)),
None => Err("command parsing failed"),
}
},
None => Err("message parsing failed"),
}
}
pub fn from (&self) -> &Option<String> {
&self.from
}
pub fn message_type (&self) -> &MessageType {
&self.message_type
}
pub fn params (&self) -> &Vec<String> {
&self.params
}
pub fn is_reply (&self) -> bool {
self.message_type.is_reply()
}
pub fn write_protocol_string<W: Writer> (&self, w: &mut W) -> io::IoResult<()> {
let mut buf = [0u8, ..MAX_MESSAGE_LENGTH];
{
let mut bufw = io::BufWriter::new(buf);
match self.from {
Some(ref f) => { try!(write!(bufw, ":{} ", f)) },
None => {},
}
try!(write!(bufw, "{}", self.message_type));
for param in self.params.iter() {
if param.as_slice().contains_char(' ') {
try!(write!(bufw, " :{}", param));
}
else {
try!(write!(bufw, " {}", param));
}
}
try!(write!(bufw, "\r\n"));
}
let len = buf.iter().position(|&c| c == 0).unwrap_or(MAX_MESSAGE_LENGTH);
try!(w.write(buf.slice(0, len)));
try!(w.flush());
Ok(())
}
pub fn to_protocol_string (&self) -> String {
let mut w = io::MemWriter::new();
// this should never fail, so unwrap is fine
self.write_protocol_string(&mut w).unwrap();
// XXX encoding
String::from_utf8_lossy(w.unwrap().as_slice()).into_string()
}
fn parse_params(params: &str) -> Vec<String> {
let mut offset = 0;
let len = params.len();
let mut ret = vec![];
loop {
if offset >= len {
return ret;
}
if params.char_at(offset) == ':' {
ret.push(params.slice(offset + 1, len).to_string());
return ret;
}
let remaining = params.slice(offset, len);
match remaining.find(' ') {
Some(next) => {
ret.push(remaining.slice(0, next).to_string());
offset += next + 1;
},
None => {
ret.push(remaining.to_string());
return ret;
}
}
}
}
}
#[test]
fn test_message_parser () {
use constants::*;
{
let msg = "PASS secretpasswordhere\r\n";
assert_eq!(
Message::parse(msg),
Ok(
Message {
from: None,
message_type: Pass,
params: vec!["secretpasswordhere".to_string()],
}
)
);
}
{
let msg = ":WiZ NICK Kilroy\r\n";
assert_eq!(
Message::parse(msg),
Ok(
Message {
from: Some("WiZ".to_string()),
message_type: Nick,
params: vec!["Kilroy".to_string()],
}
)
);
}
{
let msg = "QUIT :Gone to have lunch\r\n";
assert_eq!(
Message::parse(msg),
Ok(
Message {
from: None,
message_type: Quit,
params: vec!["Gone to have lunch".to_string()],
}
)
);
}
{
let msg = ":Trillian SQUIT cm22.eng.umd.edu :Server out of control\r\n";
assert_eq!(
Message::parse(msg),
Ok(
Message {
from: Some("Trillian".to_string()),
message_type: Squit,
params: vec![
"cm22.eng.umd.edu".to_string(),
"Server out of control".to_string(),
],
}
)
);
}
{
let msg = "401 doy :No such nick/channel\r\n";
assert_eq!(
Message::parse(msg),
Ok(
Message {
from: None,
message_type: Reply(ERR_NOSUCHNICK),
params: vec![
"doy".to_string(),
"No such nick/channel".to_string(),
],
}
)
);
}
}
|
