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use std::convert::TryInto;
use std::sync::Arc;
use std::ops::Deref;
#[derive(Clone, Default, Debug)]
pub struct Message {
pub(crate) address: Option<String>,
pub(crate) replay: Option<String>,
pub(crate) body: Arc<Body>,
pub(crate) protocol_version: i32,
pub(crate) system_codec_id: i32,
pub(crate) port: i32,
pub(crate) host: String,
pub(crate) headers: i32,
pub(crate) publish: bool,
}
#[derive(Clone, Debug)]
pub enum Body {
Byte(u8),
Short(i16),
Int(i32),
Long(i64),
Float(f32),
Double(f64),
String(String),
ByteArray(Vec<u8>),
Boolean(bool),
Char(char),
Null,
Ping
}
impl Default for Body {
fn default() -> Self {
Self::Null
}
}
impl Message {
#[inline]
pub fn body(&self) -> Arc<Body> {
return self.body.clone();
}
#[inline]
pub fn reply(&mut self, data: Body) {
self.body = Arc::new(data);
self.address = self.replay.clone();
self.replay = None;
}
pub fn generate() -> Message {
Message {
address: Some("test.01".to_string()),
replay: Some(format!(
"__vertx.reply.{}",
uuid::Uuid::new_v4().to_string()
)),
body: Arc::new(Body::String(uuid::Uuid::new_v4().to_string())),
port: 44532 as i32,
host: "localhost".to_string(),
..Default::default()
}
}
}
impl From<Vec<u8>> for Message {
#[inline]
fn from(msg: Vec<u8>) -> Self {
let mut idx = 1;
let system_codec_id = i8::from_be_bytes(msg[idx..idx + 1].try_into().unwrap()) as i32;
idx += 2;
let len_addr = i32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap()) as usize;
idx += 4;
let address = String::from_utf8(msg[idx..idx + len_addr].to_vec()).unwrap();
idx += len_addr;
let len_replay = i32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap()) as usize;
idx += 4;
let mut replay = None;
if len_replay > 0 {
let replay_str = String::from_utf8(msg[idx..idx + len_replay].to_vec()).unwrap();
idx += len_replay;
replay = Some(replay_str);
}
let port = i32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap());
idx += 4;
let len_host = i32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap()) as usize;
idx += 4;
let host = String::from_utf8(msg[idx..idx + len_host].to_vec()).unwrap();
idx += len_host;
let headers = i32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap());
idx += 4;
let body;
match system_codec_id {
0 => {
body = Body::Null
},
1 => {
body = Body::Ping
}
2 => {
body = Body::Byte(u8::from_be_bytes(msg[idx..idx + 1].try_into().unwrap()))
}
3 => {
body = Body::Boolean(i8::from_be_bytes(msg[idx..idx + 1].try_into().unwrap()) == 1)
},
4 => {
body = Body::Short(i16::from_be_bytes(msg[idx..idx + 2].try_into().unwrap()))
}
5 => {
body = Body::Int(i32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap()))
},
6 => {
body = Body::Long(i64::from_be_bytes(msg[idx..idx + 8].try_into().unwrap()))
},
7 => {
body = Body::Float(f32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap()))
},
8 => {
body = Body::Double(f64::from_be_bytes(msg[idx..idx + 8].try_into().unwrap()))
},
9 => {
let len_body = i32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap()) as usize;
idx += 4;
let body_array = msg[idx..idx + len_body].to_vec();
body = Body::String(String::from_utf8(body_array).unwrap())
},
10 => {
body = Body::Char(char::from_u32(i16::from_be_bytes(msg[idx..idx + 2].try_into().unwrap()) as u32).unwrap())
}
12 => {
let len_body = i32::from_be_bytes(msg[idx..idx + 4].try_into().unwrap()) as usize;
idx += 4;
let body_array = msg[idx..idx + len_body].to_vec();
body = Body::ByteArray(body_array)
},
_ => panic!("system_codec_id: {} not supported", system_codec_id)
}
Message {
address: Some(address.to_string()),
replay,
port,
host,
headers,
body: Arc::new(body),
system_codec_id,
..Default::default()
}
}
}
impl Message {
#[inline]
pub fn to_vec(&self) -> Result<Vec<u8>, &str> {
let mut data = vec![];
data.push(1);
let mut b0 = vec![];
match self.body.deref() {
Body::Int(b) => {
data.push(5);
b0.extend_from_slice(b.to_be_bytes().as_slice());
}
Body::Long(b) => {
data.push(6);
b0.extend_from_slice(b.to_be_bytes().as_slice());
}
Body::Float(b) => {
data.push(7);
b0.extend_from_slice(b.to_be_bytes().as_slice());
}
Body::Double(b) => {
data.push(8);
b0.extend_from_slice(b.to_be_bytes().as_slice());
}
Body::String(b) => {
data.push(9);
b0.extend_from_slice(&(b.len() as i32).to_be_bytes());
b0.extend_from_slice(b.as_bytes());
}
Body::ByteArray(b) => {
data.push(12);
b0.extend_from_slice(&(b.len() as i32).to_be_bytes());
b0.extend_from_slice(b.as_slice());
}
Body::Boolean(b) => {
data.push(3);
if *b {
b0.extend_from_slice((1 as i8).to_be_bytes().as_slice())
} else {
b0.extend_from_slice((0 as i8).to_be_bytes().as_slice())
}
}
Body::Null => {
data.push(0);
}
Body::Byte(b) => {
data.push(2);
b0.push(*b);
}
Body::Short(b) => {
data.push(4);
b0.extend_from_slice(b.to_be_bytes().as_slice());
}
Body::Char(b) => {
data.push(10);
b0.extend_from_slice((((*b) as u32) as i16).to_be_bytes().as_slice());
}
Body::Ping => {
data.push(1);
}
};
data.push(0);
let address = self.address.clone().expect("Replay message not found!");
data.extend_from_slice(&(address.len() as i32).to_be_bytes());
data.extend_from_slice(address.as_bytes());
match self.replay.clone() {
Some(addr) => {
data.extend_from_slice(&(addr.len() as i32).to_be_bytes());
data.extend_from_slice(addr.as_bytes());
}
None => {
data.extend_from_slice(&(0 as i32).to_be_bytes());
}
}
data.extend_from_slice(&self.port.to_be_bytes());
data.extend_from_slice(&(self.host.len() as i32).to_be_bytes());
data.extend_from_slice(self.host.as_bytes());
data.extend_from_slice(&(4 as i32).to_be_bytes());
data.extend_from_slice(b0.as_slice());
let len = ((data.len()) as i32).to_be_bytes();
for idx in 0..4 {
data.insert(idx, len[idx]);
}
return Ok(data);
}
}