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Kodi Craft 2024-06-24 18:26:19 +02:00
parent bfd4c1346f
commit 812861640d
Signed by: kodi
GPG Key ID: 69D9EED60B242822
8 changed files with 247 additions and 18 deletions
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14
.gitea/workflows/build.yaml
View File

@ -15,4 +15,16 @@ jobs:
- name: Run clippy
run: nix build .#clippy_${{ matrix.feature }}
- name: Build & test
run: nix build .#${{ matrix.feature }}
run: nix build .#${{ matrix.feature }}
docs:
runs-on: nix
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Build docs
run: nix build .#doc.doc
- name: (Temporary) Upload docs
uses: actions/upload-artifact@v2
with:
name: docs
path: result-doc/*

53
Cargo.lock generated
View File

@ -75,6 +75,28 @@ dependencies = [
"windows-sys 0.52.0",
]
[[package]]
name = "async-stream"
version = "0.3.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cd56dd203fef61ac097dd65721a419ddccb106b2d2b70ba60a6b529f03961a51"
dependencies = [
"async-stream-impl",
"futures-core",
"pin-project-lite",
]
[[package]]
name = "async-stream-impl"
version = "0.3.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "16e62a023e7c117e27523144c5d2459f4397fcc3cab0085af8e2224f643a0193"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "backtrace"
version = "0.3.73"
@ -142,6 +164,7 @@ dependencies = [
"serde",
"syn",
"tokio",
"tokio-test",
]
[[package]]
@ -167,6 +190,12 @@ dependencies = [
"log",
]
[[package]]
name = "futures-core"
version = "0.3.30"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dfc6580bb841c5a68e9ef15c77ccc837b40a7504914d52e47b8b0e9bbda25a1d"
[[package]]
name = "getrandom"
version = "0.2.15"
@ -435,6 +464,30 @@ dependencies = [
"syn",
]
[[package]]
name = "tokio-stream"
version = "0.1.15"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "267ac89e0bec6e691e5813911606935d77c476ff49024f98abcea3e7b15e37af"
dependencies = [
"futures-core",
"pin-project-lite",
"tokio",
]
[[package]]
name = "tokio-test"
version = "0.4.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2468baabc3311435b55dd935f702f42cd1b8abb7e754fb7dfb16bd36aa88f9f7"
dependencies = [
"async-stream",
"bytes",
"futures-core",
"tokio",
"tokio-stream",
]
[[package]]
name = "unicode-ident"
version = "1.0.12"

1
Cargo.toml
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@ -27,6 +27,7 @@ log = { version = "0.4.21", optional = true }
tokio = { version = "1.38.0", features = ["sync", "rt-multi-thread", "macros", "time", "io-util", "net"] }
env_logger = "0.11.3"
log = "0.4.21"
tokio-test = "0.4.4"
[lib]
proc-macro = true

25
README.md
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@ -2,13 +2,12 @@
## Stability
Eagle is still in early development. Performance is not ideal and the interface is likely to change over time. However,
it is in a usable state currently.
Eagle is still in early development. Performance is not ideal, the interface is likely to change and the documentation is not final. Basic functionality is fully implemented and works as expected.
## What is Eagle?
Eagle is a library which allows you to easily build an [RPC](https://en.wikipedia.org/wiki/Remote_procedure_call) protocol.
It uses a macro to generate the required communication code and makes adding new functions easy and quick. Eagle is designed to work specifically with `tokio` and uses `serde` for formatting data.
It uses a macro to generate the required communication code and makes adding new functions easy and quick. Eagle is designed to work specifically with [`tokio`](https://crates.io/crates/tokio) and uses [`serde`](https://crates.io/crates/serde) for formatting data.
## Using Eagle
@ -16,9 +15,9 @@ The way that `eagle` is designed to be used is inside a shared dependency betwee
Inside this crate, you can define your protocol as an enum:
```rs
```rust
use eagle::Protocol;
use serde::{Serialize, Deserliaze};
use serde::{Serialize, Deserialize};
#[derive(Clone, Serialize, Deserialize)]
pub struct ExampleStruct {
@ -35,14 +34,14 @@ pub enum Example {
}
```
Each variant describes one of the functions that the client can call, the first field on a variant represents the arguments that the client can send and the second field represents the return value. In the example above, the `addition` function would take in two `i32`s and return another `i32`. Any data passed this way must implement `Clone` as well as `serde::Serialize` and `serde::Deserialize`.
Each variant describes one of the functions that the client can call, the first field on a variant represents the arguments that the client can send and the second field represents the return value. In the example above, the `addition` function would take in two [`i32`]s and return another [`i32`]. Any data passed this way must implement [`Clone`] as well as [`serde::Serialize`] and [`serde::Deserialize`].
The [`Protocol`] macro will create a number of exports in your shared crate. You will be able to import them by name in your client and server.
Once your protocol is defined, you can implement it on your server. To do so, you must first implement a handler for your
protocol. A handler must implement `Clone` as well as the `ServerHandler` trait for your protocol. For the above example:
```rs
use shared::ExampleServerHandler;
protocol. A handler must implement [`Clone`] as well as the `ServerHandler` trait for your protocol. For the above example:
```rust
struct ExampleHandler {
state: i32
}
@ -59,14 +58,12 @@ impl ExampleServerHandler for ExampleHandler {
self.state = state;
self.state
}
/* ... */
}
```
Your handler can now be used by the server. You can easily bind your server to a socket with:
```rs
```rust
use shared::ExampleServer;
let handler = ExampleHandler { state: 0 };
@ -80,7 +77,7 @@ Note that bind is an asynchronous function which should never return, you must p
On the client, all you need to do is to use your protocol's `Client` to connect and you can start making requests.
```rs
```rust
use shared::ExampleClient;
let client = ExampleClient::connect("127.0.0.1:1234").await.unwrap();

6
flake.nix
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@ -20,6 +20,12 @@
doCheck = true;
mode = "test";
};
doc = naersk-lib.buildPackage {
src = ./.;
doDoc = true;
mode = "test";
cargoDocOptions = x: x ++ ["--no-deps"];
};
unix = naersk-lib.buildPackage {
src = ./.;
doCheck = true;

162
src/lib.rs
View File

@ -1,5 +1,5 @@
/*
Eagle - A library for easy communication in full-stack Rust applications
Eagle - A simple library for RPC in Rust
Copyright (c) 2024 KodiCraft
This program is free software: you can redistribute it and/or modify
@ -15,6 +15,139 @@ GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
//! # Eagle - A simple library for RPC in Rust
//!
//! <div class="warning">Eagle is still in early development. This documentation is subject to change and may not be entirely accurate.</div>
//!
//! Eagle is a library for building RPC protocols in Rust. It uses a macro
//! to transform your protocol definition into the necessary code to allow
//! communication between a server and a client.
//!
//! Eagle uses [`tokio`](https://tokio.rs) as its async runtime and
//! [`ron`](https://crates.io/crates/ron) for serialization.
//!
//! ## Usage
//! `eagle` is designed to be used to create your own protocol crate. We
//! recommend creating a new cargo workspace for your project with a shared
//! crate which will contain your protocol definition and individual crates
//! for the server and client.
//!
//! In your shared crate, you can define your protocol using the [`Protocol`]
//! derive macro. This will generate the necessary code for the server and
//! client to communicate.
//!
//! ```rust
//! use eagle::Protocol;
//!
//! #[derive(Protocol)]
//! pub enum Example {
//! Add((i32, i32), i32),
//! Length(String, usize),
//! /* ... */
//! }
//! ```
//!
//! The [`Protocol`] derive macro will generate all the necessary code, including
//! your handler trait, your server struct, and your client struct.
//!
//! On your server, you will need to implement the handler trait. This trait
//! describes the functions that the client can request from the server.
//!
//! ```rust
//! # use eagle::Protocol;
//! # #[derive(Protocol)]
//! # pub enum Example {
//! # Add((i32, i32), i32),
//! # Length(String, usize),
//! # /* ... */
//! # }
//! #
//! #[derive(Clone)]
//! pub struct Handler;
//! impl ExampleServerHandler for Handler {
//! async fn add(&mut self, a: i32, b: i32) -> i32 {
//! a + b
//! }
//! async fn length(&mut self, s: String) -> usize {
//! s.len()
//! }
//! /* ... */
//! }
//! ```
//!
//! To start the server, you simply need to use the generated server struct and
//! pass it your handler.
//!
//! ```no_run
//! # use eagle::Protocol;
//! # #[derive(Protocol)]
//! # pub enum Example {
//! # Add((i32, i32), i32),
//! # Length(String, usize),
//! # /* ... */
//! # }
//! #
//! # #[derive(Clone)]
//! # pub struct Handler;
//! # impl ExampleServerHandler for Handler {
//! # async fn add(&mut self, a: i32, b: i32) -> i32 {
//! # a + b
//! # }
//! # async fn length(&mut self, s: String) -> usize {
//! # s.len()
//! # }
//! # }
//! #
//! # tokio_test::block_on(async {
//! let handler = Handler;
//! let address = "127.0.0.1:12345"; // Or, if using the 'unix' feature, "/tmp/eagle.sock"
//! let server_task = tokio::spawn(ExampleServer::bind(handler, address));
//! # });
//! ```
//!
//! Please note the usage of `tokio::spawn`. This is because the `bind` function
//! will not return until the server is closed. You can use the `abort` method
//! on the task to close the server.
//!
//! On the client side, you can simply use the generated client struct to connect
//! to the server and begin sending queries.
//!
//! ```no_run
//! # use eagle::Protocol;
//! # #[derive(Protocol)]
//! # pub enum Example {
//! # Add((i32, i32), i32),
//! # Length(String, usize),
//! # /* ... */
//! # }
//! #
//! # #[derive(Clone)]
//! # pub struct Handler;
//! # impl ExampleServerHandler for Handler {
//! # async fn add(&mut self, a: i32, b: i32) -> i32 {
//! # a + b
//! # }
//! # async fn length(&mut self, s: String) -> usize {
//! # s.len()
//! # }
//! # }
//! #
//! # tokio_test::block_on(async {
//! # let handler = Handler;
//! let address = "127.0.0.1:12345"; // Or, if using the 'unix' feature, "/tmp/eagle.sock"
//! # let server_task = tokio::spawn(ExampleServer::bind(handler, address));
//! let client = ExampleClient::connect(address).await.unwrap();
//! # // Wait for the server to start, the developer is responsible for this in production
//! # tokio::time::sleep(std::time::Duration::from_millis(10)).await;
//! assert_eq!(client.add(2, 5).await.unwrap(), 7);
//! # });
//! ```
//!
//! The client can be closed by calling the `close` method on the client struct.
//! This will abort the connection.
#![warn(missing_docs)]
use proc_macro::TokenStream;
use quote::{format_ident, quote};
use syn::{parse2, spanned::Spanned, DeriveInput, Field, Ident};
@ -26,6 +159,33 @@ compile_error!("You must enable either the 'tcp' or 'unix' feature");
#[cfg(all(feature = "unix", not(unix)))]
compile_error!("The 'unix' feature requires compiling for a unix target");
/// Generate all the necessary RPC code for a protocol from an enum describing it.
///
/// This macro will generate various enums and structs to enable communication
/// between a server and a client. The following items will be generated, where {}
/// is the name of the protocol enum:
/// - `{}ServerHandler` - A trait that the server must implement to handle queries
/// - `{}Server` - A struct that the server uses to communicate with clients
/// - `{}Client` - A struct that the client uses to communicate with a server
///
/// Each variant of the passed enum represents a query that the client can send to the
/// server. The first field of each variant is the question (serverbound), the second field
/// is the answer (clientbound). You may use tuples to represent sending multiple arguments and
/// you may use the unit type `()` to represent no arguments. Only data types which implement
/// [`Clone`], [`serde::Serialize`], and [`serde::Deserialize`] can be used.
///
/// For more information on how to use the generated code, see the [crate-level documentation](index.html).
///
/// # Example
/// ```rust
/// use eagle::Protocol;
///
/// #[derive(Protocol)]
/// pub enum Example {
/// Add((i32, i32), i32),
/// Length(String, usize),
/// }
/// ```
#[proc_macro_derive(Protocol)]
pub fn derive_protocol_derive(input: TokenStream) -> TokenStream {
let expanded = derive_protocol(input.into());

2
tests/client.rs
View File

@ -1,5 +1,5 @@
/*
Eagle - A library for easy communication in full-stack Rust applications
Eagle - A simple library for RPC in Rust
Copyright (c) 2024 KodiCraft
This program is free software: you can redistribute it and/or modify

2
tests/full.rs
View File

@ -1,5 +1,5 @@
/*
Eagle - A library for easy communication in full-stack Rust applications
Eagle - A simple library for RPC in Rust
Copyright (c) 2024 KodiCraft
This program is free software: you can redistribute it and/or modify