amqp-codec 0.1.0

AMQP 1.0 Protocol Codec
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
143
144
145
146
147
148
149
150

use bytes::BytesMut;
use std::marker::Sized;

use crate::errors::AmqpParseError;

macro_rules! decode_check_len {
    ($buf:ident, $size:expr) => {
        if $buf.len() < $size {
            return Err(AmqpParseError::Incomplete(Some($size)));
        }
    };
}

#[macro_use]
mod decode;
mod encode;

pub(crate) use self::decode::decode_list_header;

pub trait Encode {
    fn encoded_size(&self) -> usize;

    fn encode(&self, buf: &mut BytesMut);
}

pub trait ArrayEncode {
    const ARRAY_FORMAT_CODE: u8;

    fn array_encoded_size(&self) -> usize;

    fn array_encode(&self, buf: &mut BytesMut);
}

pub trait Decode
where
    Self: Sized,
{
    fn decode(input: &[u8]) -> Result<(&[u8], Self), AmqpParseError>;
}

pub trait DecodeFormatted
where
    Self: Sized,
{
    fn decode_with_format(input: &[u8], fmt: u8) -> Result<(&[u8], Self), AmqpParseError>;
}

pub trait ArrayDecode: Sized {
    fn array_decode(input: &[u8]) -> Result<(&[u8], Self), AmqpParseError>;
}

impl<T: DecodeFormatted> Decode for T {
    fn decode(input: &[u8]) -> Result<(&[u8], Self), AmqpParseError> {
        let (input, fmt) = decode_format_code(input)?;
        T::decode_with_format(input, fmt)
    }
}

pub fn decode_format_code(input: &[u8]) -> Result<(&[u8], u8), AmqpParseError> {
    decode_check_len!(input, 1);
    Ok((&input[1..], input[0]))
}

pub const FORMATCODE_DESCRIBED: u8 = 0x00;
pub const FORMATCODE_NULL: u8 = 0x40; // fixed width --V
pub const FORMATCODE_BOOLEAN: u8 = 0x56;
pub const FORMATCODE_BOOLEAN_TRUE: u8 = 0x41;
pub const FORMATCODE_BOOLEAN_FALSE: u8 = 0x42;
pub const FORMATCODE_UINT_0: u8 = 0x43;
pub const FORMATCODE_ULONG_0: u8 = 0x44;
pub const FORMATCODE_UBYTE: u8 = 0x50;
pub const FORMATCODE_USHORT: u8 = 0x60;
pub const FORMATCODE_UINT: u8 = 0x70;
pub const FORMATCODE_ULONG: u8 = 0x80;
pub const FORMATCODE_BYTE: u8 = 0x51;
pub const FORMATCODE_SHORT: u8 = 0x61;
pub const FORMATCODE_INT: u8 = 0x71;
pub const FORMATCODE_LONG: u8 = 0x81;
pub const FORMATCODE_SMALLUINT: u8 = 0x52;
pub const FORMATCODE_SMALLULONG: u8 = 0x53;
pub const FORMATCODE_SMALLINT: u8 = 0x54;
pub const FORMATCODE_SMALLLONG: u8 = 0x55;
pub const FORMATCODE_FLOAT: u8 = 0x72;
pub const FORMATCODE_DOUBLE: u8 = 0x82;
// pub const FORMATCODE_DECIMAL32: u8 = 0x74;
// pub const FORMATCODE_DECIMAL64: u8 = 0x84;
// pub const FORMATCODE_DECIMAL128: u8 = 0x94;
pub const FORMATCODE_CHAR: u8 = 0x73;
pub const FORMATCODE_TIMESTAMP: u8 = 0x83;
pub const FORMATCODE_UUID: u8 = 0x98;
pub const FORMATCODE_BINARY8: u8 = 0xa0; // variable --V
pub const FORMATCODE_BINARY32: u8 = 0xb0;
pub const FORMATCODE_STRING8: u8 = 0xa1;
pub const FORMATCODE_STRING32: u8 = 0xb1;
pub const FORMATCODE_SYMBOL8: u8 = 0xa3;
pub const FORMATCODE_SYMBOL32: u8 = 0xb3;
pub const FORMATCODE_LIST0: u8 = 0x45; // compound --V
pub const FORMATCODE_LIST8: u8 = 0xc0;
pub const FORMATCODE_LIST32: u8 = 0xd0;
pub const FORMATCODE_MAP8: u8 = 0xc1;
pub const FORMATCODE_MAP32: u8 = 0xd1;
pub const FORMATCODE_ARRAY8: u8 = 0xe0;
pub const FORMATCODE_ARRAY32: u8 = 0xf0;

#[cfg(test)]
mod tests {
    use bytes::{Bytes, BytesMut};

    use crate::codec::{Decode, Encode};
    use crate::errors::AmqpCodecError;
    use crate::framing::{AmqpFrame, SaslFrame};
    use crate::protocol::SaslFrameBody;

    #[test]
    fn test_sasl_mechanisms() -> Result<(), AmqpCodecError> {
        let data = b"\x02\x01\0\0\0S@\xc02\x01\xe0/\x04\xb3\0\0\0\x07MSSBCBS\0\0\0\x05PLAIN\0\0\0\tANONYMOUS\0\0\0\x08EXTERNAL";

        let (remainder, frame) = SaslFrame::decode(data.as_ref())?;
        assert!(remainder.is_empty());
        match frame.body {
            SaslFrameBody::SaslMechanisms(_) => (),
            _ => panic!("error"),
        }

        let mut buf = BytesMut::new();
        buf.reserve(frame.encoded_size());
        frame.encode(&mut buf);
        buf.split_to(4);
        assert_eq!(Bytes::from_static(data), buf.freeze());

        Ok(())
    }

    #[test]
    fn test_disposition() -> Result<(), AmqpCodecError> {
        let data = b"\x02\0\0\0\0S\x15\xc0\x0c\x06AC@A\0S$\xc0\x01\0B";

        let (remainder, frame) = AmqpFrame::decode(data.as_ref())?;
        assert!(remainder.is_empty());
        assert_eq!(frame.performative().name(), "Disposition");

        let mut buf = BytesMut::new();
        buf.reserve(frame.encoded_size());
        frame.encode(&mut buf);
        buf.split_to(4);
        assert_eq!(Bytes::from_static(data), buf.freeze());

        Ok(())
    }
}