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
|
use constants::{CommandMessage, MessageType, ReplyMessage};
#[deriving(PartialEq, Eq, Show)]
pub struct Message {
from: Option<String>,
message_type: MessageType,
params: Vec<String>,
}
impl Message {
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> {
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 write_protocol_string<W: Writer> (&self, w: &mut W) {
match &self.from {
&Some(ref f) => { write!(w, ":{} ", f); },
&None => {},
}
match &self.message_type {
&CommandMessage(ref c) => {
write!(w, "{}", c);
},
&ReplyMessage(ref r) => {
write!(w, "{}", r);
},
}
for param in self.params.iter() {
if param.as_slice().contains_char(' ') {
write!(w, " :{}", param);
}
else {
write!(w, " {}", param);
}
}
write!(w, "\r\n");
w.flush();
}
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: CommandMessage(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: CommandMessage(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: CommandMessage(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: CommandMessage(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: ReplyMessage(Reply(ERR_NOSUCHNICK)),
params: vec![
"doy".to_string(),
"No such nick/channel".to_string(),
],
}
)
);
}
}
|
