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distant/distant-core/README.md

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# distant core
[![Crates.io][distant_crates_img]][distant_crates_lnk] [![Docs.rs][distant_doc_img]][distant_doc_lnk] [![Rustc 1.51.0][distant_rustc_img]][distant_rustc_lnk]
[distant_crates_img]: https://img.shields.io/crates/v/distant-core.svg
[distant_crates_lnk]: https://crates.io/crates/distant-core
[distant_doc_img]: https://docs.rs/distant-core/badge.svg
[distant_doc_lnk]: https://docs.rs/distant-core
[distant_rustc_img]: https://img.shields.io/badge/distant_core-rustc_1.51+-lightgray.svg
[distant_rustc_lnk]: https://blog.rust-lang.org/2021/03/25/Rust-1.51.0.html
Library that powers the [`distant`](https://github.com/chipsenkbeil/distant)
binary.
🚧 **(Alpha stage software) This library is in rapid development and may break or change frequently!** 🚧
## Details
The `distant` library supplies a mixture of functionality and data to run
servers that operate on remote machines and clients that talk to them.
- Asynchronous in nature, powered by [`tokio`](https://tokio.rs/)
- Data is serialized to send across the wire via [`CBOR`](https://cbor.io/)
- Encryption & authentication are handled via
[XChaCha20Poly1305](https://tools.ietf.org/html/rfc8439) for an authenticated
encryption scheme via
[RustCrypto/ChaCha20Poly1305](https://github.com/RustCrypto/AEADs/tree/master/chacha20poly1305)
## Installation
You can import the dependency by adding the following to your `Cargo.toml`:
```toml
[dependencies]
distant-core = "0.16"
```
## Features
Currently, the library supports the following features:
- `structopt`: generates [`StructOpt`](https://github.com/TeXitoi/structopt)
bindings for `RequestData` (used by cli to expose request actions)
By default, no features are enabled on the library.
## Examples
Below is an example of connecting to a distant server over TCP:
```rust
use distant_core::{Session, SessionChannelExt, SecretKey32, XChaCha20Poly1305Codec};
use std::net::SocketAddr;
// 32-byte secret key paresd from hex, used for a specific codec
let key: SecretKey32 = "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF".parse().unwrap();
let codec = XChaCha20Poly1305Codec::from(key);
let addr: SocketAddr = "example.com:8080".parse().unwrap();
let mut session = Session::tcp_connect(addr, codec).await.unwrap();
// Append text to a file, representing request as <tenant>
// NOTE: This method comes from SessionChannelExt
session.append_file_text(
"<tenant>",
"path/to/file.txt".to_string(),
"new contents"
).await.expect("Failed to append to file");
```
## License
This project is licensed under either of
Apache License, Version 2.0, (LICENSE-APACHE or
[apache-license][apache-license]) MIT license (LICENSE-MIT or
[mit-license][mit-license]) at your option.
[apache-license]: http://www.apache.org/licenses/LICENSE-2.0
[mit-license]: http://opensource.org/licenses/MIT