kafkang 0.3.0

Rust client for Apache Kafka
Documentation 
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

use std::io::{Read, Write};

use crate::codecs::{FromByte, ToByte};
use crate::error::{Error, Result};

use super::{API_KEY_SASL_AUTHENTICATE, HeaderRequest, HeaderResponse};

const SASL_AUTHENTICATE_REQUEST_VERSION: i16 = 1;

#[derive(Debug)]
pub struct SaslAuthenticateRequest<'a> {
    pub header: HeaderRequest<'a>,
    pub auth_bytes: &'a [u8],
}

impl<'a> SaslAuthenticateRequest<'a> {
    pub fn new(correlation_id: i32, client_id: &'a str, auth_bytes: &'a [u8]) -> Self {
        SaslAuthenticateRequest {
            header: HeaderRequest::new(
                API_KEY_SASL_AUTHENTICATE,
                SASL_AUTHENTICATE_REQUEST_VERSION,
                correlation_id,
                client_id,
            ),
            auth_bytes,
        }
    }
}

impl ToByte for SaslAuthenticateRequest<'_> {
    fn encode<W: Write>(&self, buffer: &mut W) -> Result<()> {
        try_multi!(self.header.encode(buffer), self.auth_bytes.encode(buffer))
    }
}

// --------------------------------------------------------------------

#[derive(Default, Debug)]
pub struct SaslAuthenticateResponse {
    pub header: HeaderResponse,
    pub error_code: i16,
    pub error_message: String,
    pub auth_bytes: Vec<u8>,
    pub session_lifetime_ms: i64,
}

impl SaslAuthenticateResponse {
    pub fn check_error(&self) -> Result<()> {
        match Error::from_protocol(self.error_code) {
            Some(err) => Err(err),
            None => Ok(()),
        }
    }
}

impl FromByte for SaslAuthenticateResponse {
    type R = SaslAuthenticateResponse;

    #[allow(unused_must_use)]
    fn decode<T: Read>(&mut self, buffer: &mut T) -> Result<()> {
        try_multi!(
            self.header.decode(buffer),
            self.error_code.decode(buffer),
            self.error_message.decode(buffer),
            self.auth_bytes.decode(buffer),
            self.session_lifetime_ms.decode(buffer)
        )
    }
}

// --------------------------------------------------------------------

#[cfg(test)]
mod tests {
    use std::io::Cursor;

    use crate::codecs::{FromByte, ToByte};

    use super::{SaslAuthenticateRequest, SaslAuthenticateResponse};

    #[test]
    fn test_sasl_authenticate_request_v1_encoding() {
        let correlation_id: i32 = 123;
        let client_id = "test-client";
        let auth_bytes = b"token";

        let req = SaslAuthenticateRequest::new(correlation_id, client_id, auth_bytes);

        let mut buf = Vec::new();
        req.encode(&mut buf).unwrap();

        let mut expected = Vec::new();
        (36i16).encode(&mut expected).unwrap(); // api_key
        (1i16).encode(&mut expected).unwrap(); // api_version
        correlation_id.encode(&mut expected).unwrap();
        client_id.encode(&mut expected).unwrap();
        auth_bytes.as_slice().encode(&mut expected).unwrap();

        assert_eq!(buf, expected);
    }

    #[test]
    fn test_sasl_authenticate_response_v1_decoding_null_error_message() {
        let correlation_id: i32 = 456;
        let error_code: i16 = 0;

        let mut buf = Vec::new();
        correlation_id.encode(&mut buf).unwrap();
        error_code.encode(&mut buf).unwrap();
        (-1i16).encode(&mut buf).unwrap(); // error_message: null
        (0i32).encode(&mut buf).unwrap(); // auth_bytes: empty
        (0i64).encode(&mut buf).unwrap(); // session_lifetime_ms

        let resp = SaslAuthenticateResponse::decode_new(&mut Cursor::new(buf)).unwrap();
        assert_eq!(resp.header.correlation, correlation_id);
        assert_eq!(resp.error_code, 0);
        assert_eq!(resp.error_message, "");
        assert!(resp.auth_bytes.is_empty());
        assert_eq!(resp.session_lifetime_ms, 0);
    }

    #[test]
    fn test_sasl_authenticate_response_v1_decoding_error_message_present() {
        let correlation_id: i32 = 789;
        let error_code: i16 = 34;
        let error_message = "Illegal state";

        let mut buf = Vec::new();
        correlation_id.encode(&mut buf).unwrap();
        error_code.encode(&mut buf).unwrap();
        error_message.encode(&mut buf).unwrap();
        (0i32).encode(&mut buf).unwrap(); // auth_bytes: empty
        (3600000i64).encode(&mut buf).unwrap(); // session_lifetime_ms

        let resp = SaslAuthenticateResponse::decode_new(&mut Cursor::new(buf)).unwrap();
        assert_eq!(resp.header.correlation, correlation_id);
        assert_eq!(resp.error_code, error_code);
        assert_eq!(resp.error_message, "Illegal state");
        assert!(resp.auth_bytes.is_empty());
        assert_eq!(resp.session_lifetime_ms, 3_600_000);
    }
}