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Wesley Moore 2024-01-19 21:10:15 +10:00
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Cargo.lock generated Normal file
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10
Cargo.toml Normal file
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@ -0,0 +1,10 @@
[package]
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edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
esphome-proto = { version = "0.1.0", path = "../esphome-proto" }
smol = "2.0.0"

112
src/lib.rs Normal file
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@ -0,0 +1,112 @@
use std::io::{self, Read, Write};
use std::net::{TcpStream, ToSocketAddrs};
use esphome_proto::api::{HelloRequest, HelloResponse};
use esphome_proto::protobuf::{CodedInputStream, CodedOutputStream, MessageFull};
pub struct Client {
connections: Vec<Connection>,
}
pub struct Connection {
stream: TcpStream,
}
impl Client {
pub fn connect<A: ToSocketAddrs>(addr: A) -> Result<(), ()> {
// Add to the connection list
// Set up periodic ping?
todo!()
}
}
impl Connection {
/// Perform the initial handshake to connect to a device
pub fn connect<A: ToSocketAddrs>(addr: A) -> Result<Connection, io::Error> {
let mut stream = TcpStream::connect(addr)?;
// Do the handshake
let hello = HelloRequest {
client_info: "esphome-api".to_string(), // TODO: Expose this to client
api_version_major: 1,
api_version_minor: 9,
special_fields: Default::default(),
};
Self::send_message(hello, &mut stream)?;
println!("sent HelloRequest");
let response: HelloResponse = Self::receive_message(&mut stream)?;
dbg!(response);
// Sent Connect request; read response
Ok(Connection { stream })
}
fn send_message<M, W>(message: M, stream: &mut W) -> Result<(), io::Error>
where
M: MessageFull,
W: Write,
{
let mut buf = Vec::new();
let mut out = CodedOutputStream::vec(&mut buf);
let id_option = esphome_proto::api_options::exts::id;
let id = M::descriptor()
.proto()
.options
.as_ref()
.and_then(|options| id_option.get(options))
.ok_or_else(|| io::Error::new(io::ErrorKind::Other, "message is missing id"))?;
let len = u32::try_from(message.compute_size())
.map_err(|err| io::Error::new(io::ErrorKind::Other, err))?;
out.write_raw_byte(0)?;
out.write_raw_varint32(len)?;
out.write_raw_varint32(id)?;
message.write_to_with_cached_sizes(&mut out)?;
out.flush()?;
drop(out);
stream.write_all(&buf)
}
/// Receive a specific message type
fn receive_message<M, R>(stream: &mut R) -> Result<M, io::Error>
where
M: MessageFull,
R: Read,
{
let mut is = CodedInputStream::new(stream);
let id_option = esphome_proto::api_options::exts::id;
let id = M::descriptor()
.proto()
.options
.as_ref()
.and_then(|options| id_option.get(options))
.ok_or_else(|| io::Error::new(io::ErrorKind::Other, "message is missing id"))?;
let zero = is.read_raw_byte()?;
if zero != 0 {
return Err(io::Error::new(
io::ErrorKind::Other,
format!("expected zero got: {zero}"),
));
}
println!("read 0");
let len = is.read_raw_varint32()?;
println!("read len: {len}");
let message_id = is.read_raw_varint32()?;
println!("read message_id: {message_id}");
if message_id != id {
return Err(io::Error::new(
io::ErrorKind::Other,
format!("expected message id {id} got {message_id}"),
));
}
println!("reading message...");
// let msg = ins.read_message()?;
let old_limit = is.push_limit(u64::from(len))?;
let msg = M::parse_from(&mut is)?;
is.pop_limit(old_limit);
Ok(msg)
}
}

6
tests/e2e.rs Normal file
View file

@ -0,0 +1,6 @@
use esphome_api::Connection;
#[test]
fn hello() {
let conn = Connection::connect(("testdev.local", 6053)).unwrap();
}