First commit: skeleton for something great

author: Alex Auvolat <alex@adnab.me> 2020-04-05 23:33:42 +0200
committer: Alex Auvolat <alex@adnab.me> 2020-04-05 23:33:42 +0200
commit: 7102db1d544bec663a8492b24c455168d0b83f08 (patch)
tree: cc308cbeefc3f48b55149e85ec737867c24a498e /src
download: garage-7102db1d544bec663a8492b24c455168d0b83f08.tar.gz
garage-7102db1d544bec663a8492b24c455168d0b83f08.zip
6 files changed, 285 insertions, 0 deletions
diff --git a/src/api.rs b/src/api.rs
new file mode 100644
index 00000000..9ee17047
--- /dev/null
+++ b/src/api.rs
@@ -0,0 +1,65 @@
+use futures_util::TryStreamExt;
+use hyper::service::{make_service_fn, service_fn};
+use hyper::{Body, Method, Request, Response, Server, StatusCode};
+use futures::future::Future;
+
+use crate::error::Error;
+use crate::System;
+
+/// This is our service handler. It receives a Request, routes on its
+/// path, and returns a Future of a Response.
+async fn echo(req: Request<Body>) -> Result<Response<Body>, Error> {
+    match (req.method(), req.uri().path()) {
+        // Serve some instructions at /
+        (&Method::GET, "/") => Ok(Response::new(Body::from(
+            "Try POSTing data to /echo such as: `curl localhost:3000/echo -XPOST -d 'hello world'`",
+        ))),
+
+        // Simply echo the body back to the client.
+        (&Method::POST, "/echo") => Ok(Response::new(req.into_body())),
+
+        // Convert to uppercase before sending back to client using a stream.
+        (&Method::POST, "/echo/uppercase") => {
+            let chunk_stream = req.into_body().map_ok(|chunk| {
+                chunk
+                    .iter()
+                    .map(|byte| byte.to_ascii_uppercase())
+                    .collect::<Vec<u8>>()
+            });
+            Ok(Response::new(Body::wrap_stream(chunk_stream)))
+        }
+
+        // Reverse the entire body before sending back to the client.
+        //
+        // Since we don't know the end yet, we can't simply stream
+        // the chunks as they arrive as we did with the above uppercase endpoint.
+        // So here we do `.await` on the future, waiting on concatenating the full body,
+        // then afterwards the content can be reversed. Only then can we return a `Response`.
+        (&Method::POST, "/echo/reversed") => {
+            let whole_body = hyper::body::to_bytes(req.into_body()).await?;
+
+            let reversed_body = whole_body.iter().rev().cloned().collect::<Vec<u8>>();
+            Ok(Response::new(Body::from(reversed_body)))
+        }
+
+        // Return the 404 Not Found for other routes.
+        _ => {
+            let mut not_found = Response::default();
+            *not_found.status_mut() = StatusCode::NOT_FOUND;
+            Ok(not_found)
+        }
+    }
+}
+
+pub async fn run_api_server(sys: &System, api_port: u16, shutdown_signal: impl Future<Output=()>) -> Result<(), hyper::Error> {
+    let addr = ([0, 0, 0, 0], api_port).into();
+
+    let service = make_service_fn(|_| async { Ok::<_, Error>(service_fn(echo)) });
+
+    let server = Server::bind(&addr).serve(service);
+
+	let graceful = server.with_graceful_shutdown(shutdown_signal);
+    println!("Listening on http://{}", addr);
+
+	graceful.await
+}
diff --git a/src/data.rs b/src/data.rs
new file mode 100644
index 00000000..651a9d45
--- /dev/null
+++ b/src/data.rs
@@ -0,0 +1,75 @@
+use std::net::SocketAddr;
+
+use serde::{Serialize, Deserialize};
+
+pub type UUID = [u8; 32];
+pub type Hash = [u8; 32];
+
+// Membership management
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct NodeStatus {
+	id: UUID,
+	time: u64,
+	addr: SocketAddr,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct NodeConfig {
+	id: UUID,
+	n_tokens: u32,
+}
+
+#[derive(Default, Debug, Clone, Serialize, Deserialize)]
+pub struct NetworkMembers {
+	pings: Vec<NodeStatus>,
+	desired_state: Vec<NodeConfig>,
+	desired_state_version: u64,
+}
+
+// Data management
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct SplitpointMeta {
+	bucket: String,
+	key: String,
+
+	timestamp: u64,
+	uuid: UUID,
+	deleted: bool,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct VersionMeta {
+	bucket: String,
+	key: String,
+
+	timestamp: u64,
+	uuid: UUID,
+	deleted: bool,
+
+	mime_type: String,
+	size: u64,
+	is_complete: bool,
+
+	data: VersionData,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub enum VersionData {
+	Inline(Vec<u8>),
+	FirstBlock(Hash),
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct BlockMeta {
+	version_uuid: UUID,
+	offset: u64,
+	hash: Hash,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct BlockReverseMeta {
+	versions: Vec<UUID>,
+	deleted_versions: Vec<UUID>,
+}
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 00000000..9929a896
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,19 @@
+use err_derive::Error;
+use std::io;
+
+#[derive(Debug, Error)]
+pub enum Error {
+	#[error(display = "IO error")]
+	Io(#[error(source)] io::Error),
+
+	#[error(display = "Hyper error")]
+	Hyper(#[error(source)] hyper::Error),
+
+	#[error(display = "Messagepack encode error")]
+	RMPEncode(#[error(source)] rmp_serde::encode::Error),
+	#[error(display = "Messagepack decode error")]
+	RMPDecode(#[error(source)] rmp_serde::decode::Error),
+
+	#[error(display = "")]
+	Msg(String),
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 00000000..711717d7
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,76 @@
+mod error;
+mod data;
+mod proto;
+mod rpc;
+mod api;
+
+use structopt::StructOpt;
+use futures::channel::oneshot;
+use tokio::sync::Mutex;
+use hyper::client::Client;
+
+use data::*;
+
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "garage")]
+pub struct Opt {
+	#[structopt(long = "api-port", default_value = "3900")]
+	api_port: u16,
+
+	#[structopt(long = "rpc-port", default_value = "3901")]
+	rpc_port: u16,
+}
+
+pub struct System {
+	pub opt: Opt,
+
+	pub rpc_client: Client<hyper::client::HttpConnector, hyper::Body>,
+
+	pub network_members: Mutex<NetworkMembers>,
+}
+
+async fn shutdown_signal(chans: Vec<oneshot::Sender<()>>) {
+    // Wait for the CTRL+C signal
+    tokio::signal::ctrl_c()
+        .await
+        .expect("failed to install CTRL+C signal handler");
+	for ch in chans {
+		ch.send(()).unwrap();
+	}
+}
+
+async fn wait_from(chan: oneshot::Receiver<()>) -> () {
+	chan.await.unwrap()
+}
+
+#[tokio::main]
+async fn main() {
+	let opt = Opt::from_args();
+	let rpc_port = opt.rpc_port;
+	let api_port = opt.api_port;
+
+	let sys = System{
+		opt,
+		rpc_client: Client::new(),
+		network_members: Mutex::new(NetworkMembers::default()),
+	};
+
+	let (tx1, rx1) = oneshot::channel();
+	let (tx2, rx2) = oneshot::channel();
+
+	tokio::spawn(shutdown_signal(vec![tx1, tx2]));
+
+	let rpc_server = rpc::run_rpc_server(&sys, rpc_port, wait_from(rx1));
+	let api_server = api::run_api_server(&sys, api_port, wait_from(rx2));
+
+	let (e1, e2) = futures::join![rpc_server, api_server];
+
+	if let Err(e) = e1 {
+		eprintln!("RPC server error: {}", e)
+	}
+
+	if let Err(e) = e2 {
+		eprintln!("API server error: {}", e)
+	}
+}
diff --git a/src/proto.rs b/src/proto.rs
new file mode 100644
index 00000000..029a58df
--- /dev/null
+++ b/src/proto.rs
@@ -0,0 +1,8 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub enum Message {
+	Ok,
+	Error(String),
+
+}
diff --git a/src/rpc.rs b/src/rpc.rs
new file mode 100644
index 00000000..314b64a9
--- /dev/null
+++ b/src/rpc.rs
@@ -0,0 +1,42 @@
+use bytes::IntoBuf;
+use hyper::service::{make_service_fn, service_fn};
+use hyper::{Body, Method, Request, Response, Server, StatusCode};
+use futures::future::Future;
+
+use crate::error::Error;
+use crate::proto::Message;
+use crate::System;
+
+
+/// This is our service handler. It receives a Request, routes on its
+/// path, and returns a Future of a Response.
+async fn echo(req: Request<Body>) -> Result<Response<Body>, Error> {
+	if req.method() != &Method::POST {
+		let mut bad_request = Response::default();
+		*bad_request.status_mut() = StatusCode::BAD_REQUEST;
+		return Ok(bad_request);
+	}
+          
+
+	let whole_body = hyper::body::to_bytes(req.into_body()).await?;
+	let msg = rmp_serde::decode::from_read::<_, Message>(whole_body.into_buf());
+
+	let resp = Message::Ok;
+	Ok(Response::new(Body::from(
+		rmp_serde::encode::to_vec_named(&resp)?
+        )))
+}
+
+
+pub async fn run_rpc_server(sys: &System, rpc_port: u16, shutdown_signal: impl Future<Output=()>) -> Result<(), hyper::Error> {
+    let addr = ([0, 0, 0, 0], rpc_port).into();
+
+    let service = make_service_fn(|_| async { Ok::<_, Error>(service_fn(echo)) });
+
+    let server = Server::bind(&addr).serve(service);
+
+	let graceful = server.with_graceful_shutdown(shutdown_signal);
+    println!("Listening on http://{}", addr);
+
+	graceful.await
+}
author	Alex Auvolat <alex@adnab.me>	2020-04-05 23:33:42 +0200
committer	Alex Auvolat <alex@adnab.me>	2020-04-05 23:33:42 +0200
commit	7102db1d544bec663a8492b24c455168d0b83f08 (patch)
tree	cc308cbeefc3f48b55149e85ec737867c24a498e /src
download	garage-7102db1d544bec663a8492b24c455168d0b83f08.tar.gz garage-7102db1d544bec663a8492b24c455168d0b83f08.zip