Basic workflow for client PUT, next is do actual storage
This commit is contained in:
parent
90cdffb425
commit
d50edcdb4f
|
|
@ -1,68 +1,29 @@
|
|||
use std::sync::Arc;
|
||||
use std::net::SocketAddr;
|
||||
use std::collections::VecDeque;
|
||||
|
||||
use futures_util::TryStreamExt;
|
||||
use futures::stream::StreamExt;
|
||||
use hyper::service::{make_service_fn, service_fn};
|
||||
use hyper::server::conn::AddrStream;
|
||||
use hyper::{Body, Method, Request, Response, Server, StatusCode};
|
||||
use futures::future::Future;
|
||||
|
||||
use crate::error::Error;
|
||||
use crate::membership::System;
|
||||
|
||||
/// This is our service handler. It receives a Request, routes on its
|
||||
/// path, and returns a Future of a Response.
|
||||
async fn handler(sys: Arc<System>, 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)
|
||||
}
|
||||
}
|
||||
}
|
||||
use crate::data::*;
|
||||
use crate::proto::*;
|
||||
use crate::rpc_client::*;
|
||||
|
||||
pub async fn run_api_server(sys: Arc<System>, shutdown_signal: impl Future<Output=()>) -> Result<(), hyper::Error> {
|
||||
let addr = ([0, 0, 0, 0], sys.config.api_port).into();
|
||||
|
||||
let service = make_service_fn(|_| {
|
||||
let service = make_service_fn(|conn: &AddrStream| {
|
||||
let sys = sys.clone();
|
||||
let client_addr = conn.remote_addr();
|
||||
async move {
|
||||
let sys = sys.clone();
|
||||
Ok::<_, Error>(service_fn(move |req: Request<Body>| {
|
||||
let sys = sys.clone();
|
||||
handler(sys, req)
|
||||
handler(sys, req, client_addr)
|
||||
}))
|
||||
}
|
||||
});
|
||||
|
|
@ -74,3 +35,180 @@ pub async fn run_api_server(sys: Arc<System>, shutdown_signal: impl Future<Outpu
|
|||
|
||||
graceful.await
|
||||
}
|
||||
|
||||
async fn handler(sys: Arc<System>, req: Request<Body>, addr: SocketAddr) -> Result<Response<Body>, Error> {
|
||||
match handler_inner(sys, req, addr).await {
|
||||
Ok(x) => Ok(x),
|
||||
Err(Error::BadRequest(e)) => {
|
||||
let mut bad_request = Response::new(Body::from(format!("{}\n", e)));
|
||||
*bad_request.status_mut() = StatusCode::BAD_REQUEST;
|
||||
Ok(bad_request)
|
||||
}
|
||||
Err(e) => {
|
||||
let mut ise = Response::new(Body::from(
|
||||
format!("Internal server error: {}\n", e)));
|
||||
*ise.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
|
||||
Ok(ise)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
async fn handler_inner(sys: Arc<System>, req: Request<Body>, addr: SocketAddr) -> Result<Response<Body>, Error> {
|
||||
eprintln!("{} {} {}", addr, req.method(), req.uri());
|
||||
|
||||
let bucket = req.headers()
|
||||
.get(hyper::header::HOST)
|
||||
.map(|x| x.to_str().map_err(Error::from))
|
||||
.unwrap_or(Err(Error::BadRequest(format!("Host: header missing"))))?
|
||||
.to_lowercase();
|
||||
let key = req.uri().path().to_string();
|
||||
|
||||
match req.method() {
|
||||
&Method::GET => {
|
||||
Ok(Response::new(Body::from(
|
||||
"TODO: implement GET object",
|
||||
)))
|
||||
}
|
||||
&Method::PUT => {
|
||||
let mime_type = req.headers()
|
||||
.get(hyper::header::CONTENT_TYPE)
|
||||
.map(|x| x.to_str())
|
||||
.unwrap_or(Ok("blob"))?
|
||||
.to_string();
|
||||
let version_uuid = handle_put(sys, &mime_type, &bucket, &key, req.into_body()).await?;
|
||||
Ok(Response::new(Body::from(
|
||||
format!("Version UUID: {:?}", version_uuid),
|
||||
)))
|
||||
}
|
||||
_ => Err(Error::BadRequest(format!("Invalid method"))),
|
||||
}
|
||||
}
|
||||
|
||||
async fn handle_put(sys: Arc<System>,
|
||||
mime_type: &str,
|
||||
bucket: &str, key: &str, body: Body)
|
||||
-> Result<UUID, Error>
|
||||
{
|
||||
let version_uuid = gen_uuid();
|
||||
|
||||
let mut chunker = BodyChunker::new(body, sys.config.block_size);
|
||||
let first_block = match chunker.next().await? {
|
||||
Some(x) => x,
|
||||
None => return Err(Error::BadRequest(format!("Empty body"))),
|
||||
};
|
||||
|
||||
let mut version = VersionMeta{
|
||||
bucket: bucket.to_string(),
|
||||
key: key.to_string(),
|
||||
timestamp: now_msec(),
|
||||
uuid: version_uuid.clone(),
|
||||
mime_type: mime_type.to_string(),
|
||||
size: first_block.len() as u64,
|
||||
is_complete: false,
|
||||
data: VersionData::DeleteMarker,
|
||||
};
|
||||
let version_who = sys.members.read().await
|
||||
.walk_ring(&version_uuid, sys.config.meta_replication_factor);
|
||||
|
||||
if first_block.len() < INLINE_THRESHOLD {
|
||||
version.data = VersionData::Inline(first_block);
|
||||
version.is_complete = true;
|
||||
rpc_try_call_many(sys.clone(),
|
||||
&version_who[..],
|
||||
&Message::AdvertiseVersion(version),
|
||||
(sys.config.meta_replication_factor+1)/2,
|
||||
DEFAULT_TIMEOUT).await?;
|
||||
return Ok(version_uuid)
|
||||
}
|
||||
|
||||
let first_block_hash = hash(&first_block[..]);
|
||||
version.data = VersionData::FirstBlock(first_block_hash);
|
||||
rpc_try_call_many(sys.clone(),
|
||||
&version_who[..],
|
||||
&Message::AdvertiseVersion(version.clone()),
|
||||
(sys.config.meta_replication_factor+1)/2,
|
||||
DEFAULT_TIMEOUT).await?;
|
||||
|
||||
let block_meta = BlockMeta{
|
||||
version_uuid: version_uuid.clone(),
|
||||
offset: 0,
|
||||
hash: hash(&first_block[..]),
|
||||
};
|
||||
let mut next_offset = first_block.len();
|
||||
let mut put_curr_block = put_block(sys.clone(), block_meta, first_block);
|
||||
loop {
|
||||
let (_, next_block) = futures::try_join!(put_curr_block, chunker.next())?;
|
||||
if let Some(block) = next_block {
|
||||
let block_meta = BlockMeta{
|
||||
version_uuid: version_uuid.clone(),
|
||||
offset: next_offset as u64,
|
||||
hash: hash(&block[..]),
|
||||
};
|
||||
next_offset += block.len();
|
||||
put_curr_block = put_block(sys.clone(), block_meta, block);
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// TODO: if at any step we have an error, we should undo everything we did
|
||||
|
||||
version.is_complete = true;
|
||||
rpc_try_call_many(sys.clone(),
|
||||
&version_who[..],
|
||||
&Message::AdvertiseVersion(version),
|
||||
(sys.config.meta_replication_factor+1)/2,
|
||||
DEFAULT_TIMEOUT).await?;
|
||||
Ok(version_uuid)
|
||||
}
|
||||
|
||||
async fn put_block(sys: Arc<System>, meta: BlockMeta, data: Vec<u8>) -> Result<(), Error> {
|
||||
let who = sys.members.read().await
|
||||
.walk_ring(&meta.hash, sys.config.meta_replication_factor);
|
||||
rpc_try_call_many(sys.clone(),
|
||||
&who[..],
|
||||
&Message::PutBlock(PutBlockMessage{
|
||||
meta,
|
||||
data,
|
||||
}),
|
||||
(sys.config.meta_replication_factor+1)/2,
|
||||
DEFAULT_TIMEOUT).await?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
struct BodyChunker {
|
||||
body: Body,
|
||||
block_size: usize,
|
||||
buf: VecDeque<u8>,
|
||||
}
|
||||
|
||||
impl BodyChunker {
|
||||
fn new(body: Body, block_size: usize) -> Self {
|
||||
Self{
|
||||
body,
|
||||
block_size,
|
||||
buf: VecDeque::new(),
|
||||
}
|
||||
}
|
||||
async fn next(&mut self) -> Result<Option<Vec<u8>>, Error> {
|
||||
while self.buf.len() < self.block_size {
|
||||
if let Some(block) = self.body.next().await {
|
||||
let bytes = block?;
|
||||
self.buf.extend(&bytes[..]);
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if self.buf.len() == 0 {
|
||||
Ok(None)
|
||||
} else if self.buf.len() <= self.block_size {
|
||||
let block = self.buf.drain(..)
|
||||
.collect::<Vec<u8>>();
|
||||
Ok(Some(block))
|
||||
} else {
|
||||
let block = self.buf.drain(..self.block_size)
|
||||
.collect::<Vec<u8>>();
|
||||
Ok(Some(block))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
68
src/data.rs
68
src/data.rs
|
|
@ -1,7 +1,10 @@
|
|||
use std::time::{SystemTime, UNIX_EPOCH};
|
||||
use std::fmt;
|
||||
use std::collections::HashMap;
|
||||
use serde::{Serializer, Deserializer, Serialize, Deserialize};
|
||||
use serde::de::{self, Visitor};
|
||||
use rand::Rng;
|
||||
use sha2::{Sha256, Digest};
|
||||
|
||||
#[derive(Default, PartialOrd, Ord, Clone, Hash, PartialEq)]
|
||||
pub struct FixedBytes32([u8; 32]);
|
||||
|
|
@ -69,6 +72,23 @@ impl FixedBytes32 {
|
|||
pub type UUID = FixedBytes32;
|
||||
pub type Hash = FixedBytes32;
|
||||
|
||||
pub fn hash(data: &[u8]) -> Hash {
|
||||
let mut hasher = Sha256::new();
|
||||
hasher.input(data);
|
||||
let mut hash = [0u8; 32];
|
||||
hash.copy_from_slice(&hasher.result()[..]);
|
||||
hash.into()
|
||||
}
|
||||
|
||||
pub fn gen_uuid() -> UUID {
|
||||
rand::thread_rng().gen::<[u8; 32]>().into()
|
||||
}
|
||||
|
||||
pub fn now_msec() -> u64 {
|
||||
SystemTime::now().duration_since(UNIX_EPOCH)
|
||||
.expect("Fix your clock :o")
|
||||
.as_millis() as u64
|
||||
}
|
||||
|
||||
// Network management
|
||||
|
||||
|
|
@ -86,47 +106,49 @@ pub struct NetworkConfigEntry {
|
|||
|
||||
// Data management
|
||||
|
||||
pub const INLINE_THRESHOLD: usize = 2048;
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
pub struct SplitpointMeta {
|
||||
bucket: String,
|
||||
key: String,
|
||||
pub bucket: String,
|
||||
pub key: String,
|
||||
|
||||
timestamp: u64,
|
||||
uuid: UUID,
|
||||
deleted: bool,
|
||||
pub timestamp: u64,
|
||||
pub uuid: UUID,
|
||||
pub deleted: bool,
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
#[derive(Clone, Debug, Serialize, Deserialize)]
|
||||
pub struct VersionMeta {
|
||||
bucket: String,
|
||||
key: String,
|
||||
pub bucket: String,
|
||||
pub key: String,
|
||||
|
||||
timestamp: u64,
|
||||
uuid: UUID,
|
||||
deleted: bool,
|
||||
pub timestamp: u64,
|
||||
pub uuid: UUID,
|
||||
|
||||
mime_type: String,
|
||||
size: u64,
|
||||
is_complete: bool,
|
||||
pub mime_type: String,
|
||||
pub size: u64,
|
||||
pub is_complete: bool,
|
||||
|
||||
data: VersionData,
|
||||
pub data: VersionData,
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
#[derive(Clone, Debug, Serialize, Deserialize)]
|
||||
pub enum VersionData {
|
||||
Inline(Vec<u8>),
|
||||
DeleteMarker,
|
||||
Inline(#[serde(with="serde_bytes")] Vec<u8>),
|
||||
FirstBlock(Hash),
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
#[derive(Clone, Debug, Serialize, Deserialize)]
|
||||
pub struct BlockMeta {
|
||||
version_uuid: UUID,
|
||||
offset: u64,
|
||||
hash: Hash,
|
||||
pub version_uuid: UUID,
|
||||
pub offset: u64,
|
||||
pub hash: Hash,
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
pub struct BlockReverseMeta {
|
||||
versions: Vec<UUID>,
|
||||
deleted_versions: Vec<UUID>,
|
||||
pub versions: Vec<UUID>,
|
||||
pub deleted_versions: Vec<UUID>,
|
||||
}
|
||||
|
|
|
|||
|
|
@ -12,6 +12,9 @@ pub enum Error {
|
|||
#[error(display = "HTTP error: {}", _0)]
|
||||
HTTP(#[error(source)] http::Error),
|
||||
|
||||
#[error(display = "Invalid HTTP header value: {}", _0)]
|
||||
HTTPHeader(#[error(source)] http::header::ToStrError),
|
||||
|
||||
#[error(display = "Messagepack encode error: {}", _0)]
|
||||
RMPEncode(#[error(source)] rmp_serde::encode::Error),
|
||||
#[error(display = "Messagepack decode error: {}", _0)]
|
||||
|
|
@ -26,6 +29,9 @@ pub enum Error {
|
|||
#[error(display = "RPC error: {}", _0)]
|
||||
RPCError(String),
|
||||
|
||||
#[error(display = "{}", _0)]
|
||||
BadRequest(String),
|
||||
|
||||
#[error(display = "{}", _0)]
|
||||
Message(String),
|
||||
}
|
||||
|
|
|
|||
|
|
@ -7,10 +7,10 @@ use std::collections::HashMap;
|
|||
use std::time::Duration;
|
||||
use std::net::{IpAddr, SocketAddr};
|
||||
|
||||
use sha2::{Sha256, Digest};
|
||||
use tokio::prelude::*;
|
||||
use futures::future::join_all;
|
||||
use tokio::sync::RwLock;
|
||||
use sha2::{Sha256, Digest};
|
||||
|
||||
use crate::server::Config;
|
||||
use crate::error::Error;
|
||||
|
|
@ -96,10 +96,7 @@ impl Members {
|
|||
}
|
||||
|
||||
for i in 0..config.n_tokens {
|
||||
let mut location_hasher = Sha256::new();
|
||||
location_hasher.input(format!("{} {}", hex::encode(&id), i));
|
||||
let mut location = [0u8; 32];
|
||||
location.copy_from_slice(&location_hasher.result()[..]);
|
||||
let location = hash(format!("{} {}", hex::encode(&id), i).as_bytes());
|
||||
|
||||
new_ring.push(RingEntry{
|
||||
location: location.into(),
|
||||
|
|
@ -114,7 +111,7 @@ impl Members {
|
|||
self.n_datacenters = datacenters.len();
|
||||
}
|
||||
|
||||
fn walk_ring(&self, from: &Hash, n: usize) -> Vec<UUID> {
|
||||
pub fn walk_ring(&self, from: &Hash, n: usize) -> Vec<UUID> {
|
||||
if n >= self.config.members.len() {
|
||||
return self.config.members.keys().cloned().collect::<Vec<_>>();
|
||||
}
|
||||
|
|
@ -222,7 +219,7 @@ impl System {
|
|||
let members = self.members.read().await;
|
||||
let to = members.status.keys().filter(|x| **x != self.id).cloned().collect::<Vec<_>>();
|
||||
drop(members);
|
||||
rpc_call_many(self.clone(), &to[..], &msg, None, timeout).await;
|
||||
rpc_call_many(self.clone(), &to[..], &msg, timeout).await;
|
||||
}
|
||||
|
||||
pub async fn bootstrap(self: Arc<Self>) {
|
||||
|
|
|
|||
11
src/proto.rs
11
src/proto.rs
|
|
@ -16,6 +16,9 @@ pub enum Message {
|
|||
PullConfig,
|
||||
AdvertiseNodesUp(Vec<AdvertisedNode>),
|
||||
AdvertiseConfig(NetworkConfig),
|
||||
|
||||
PutBlock(PutBlockMessage),
|
||||
AdvertiseVersion(VersionMeta),
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
|
|
@ -32,3 +35,11 @@ pub struct AdvertisedNode {
|
|||
pub id: UUID,
|
||||
pub addr: SocketAddr,
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
pub struct PutBlockMessage {
|
||||
pub meta: BlockMeta,
|
||||
|
||||
#[serde(with="serde_bytes")]
|
||||
pub data: Vec<u8>,
|
||||
}
|
||||
|
|
|
|||
|
|
@ -16,7 +16,6 @@ use crate::membership::System;
|
|||
pub async fn rpc_call_many(sys: Arc<System>,
|
||||
to: &[UUID],
|
||||
msg: &Message,
|
||||
stop_after: Option<usize>,
|
||||
timeout: Duration)
|
||||
-> Vec<Result<Message, Error>>
|
||||
{
|
||||
|
|
@ -25,19 +24,49 @@ pub async fn rpc_call_many(sys: Arc<System>,
|
|||
.collect::<FuturesUnordered<_>>();
|
||||
|
||||
let mut results = vec![];
|
||||
let mut n_ok = 0;
|
||||
while let Some(resp) = resp_stream.next().await {
|
||||
if resp.is_ok() {
|
||||
n_ok += 1
|
||||
}
|
||||
results.push(resp);
|
||||
if let Some(n) = stop_after {
|
||||
if n_ok >= n {
|
||||
break
|
||||
}
|
||||
results
|
||||
}
|
||||
|
||||
pub async fn rpc_try_call_many(sys: Arc<System>,
|
||||
to: &[UUID],
|
||||
msg: &Message,
|
||||
stop_after: usize,
|
||||
timeout: Duration)
|
||||
-> Result<Vec<Message>, Error>
|
||||
{
|
||||
let mut resp_stream = to.iter()
|
||||
.map(|to| rpc_call(sys.clone(), to, msg, timeout))
|
||||
.collect::<FuturesUnordered<_>>();
|
||||
|
||||
let mut results = vec![];
|
||||
let mut errors = vec![];
|
||||
|
||||
while let Some(resp) = resp_stream.next().await {
|
||||
match resp {
|
||||
Ok(msg) => {
|
||||
results.push(msg);
|
||||
if results.len() >= stop_after {
|
||||
break
|
||||
}
|
||||
}
|
||||
Err(e) => {
|
||||
errors.push(e);
|
||||
}
|
||||
}
|
||||
}
|
||||
results
|
||||
|
||||
if results.len() >= stop_after {
|
||||
Ok(results)
|
||||
} else {
|
||||
let mut msg = "Too many failures:".to_string();
|
||||
for e in errors {
|
||||
msg += &format!("\n{}", e);
|
||||
}
|
||||
Err(Error::Message(msg))
|
||||
}
|
||||
}
|
||||
|
||||
pub async fn rpc_call(sys: Arc<System>,
|
||||
|
|
|
|||
|
|
@ -4,14 +4,20 @@ use std::net::SocketAddr;
|
|||
use std::path::PathBuf;
|
||||
use futures::channel::oneshot;
|
||||
use serde::Deserialize;
|
||||
use rand::Rng;
|
||||
|
||||
use crate::data::UUID;
|
||||
use crate::data::*;
|
||||
use crate::error::Error;
|
||||
use crate::membership::System;
|
||||
use crate::api_server;
|
||||
use crate::rpc_server;
|
||||
|
||||
fn default_block_size() -> usize {
|
||||
1048576
|
||||
}
|
||||
fn default_meta_replication_factor() -> usize {
|
||||
3
|
||||
}
|
||||
|
||||
#[derive(Deserialize, Debug)]
|
||||
pub struct Config {
|
||||
pub metadata_dir: PathBuf,
|
||||
|
|
@ -21,6 +27,12 @@ pub struct Config {
|
|||
pub rpc_port: u16,
|
||||
|
||||
pub bootstrap_peers: Vec<SocketAddr>,
|
||||
|
||||
#[serde(default = "default_block_size")]
|
||||
pub block_size: usize,
|
||||
|
||||
#[serde(default = "default_meta_replication_factor")]
|
||||
pub meta_replication_factor: usize,
|
||||
}
|
||||
|
||||
fn read_config(config_file: PathBuf) -> Result<Config, Error> {
|
||||
|
|
@ -49,11 +61,11 @@ fn gen_node_id(metadata_dir: &PathBuf) -> Result<UUID, Error> {
|
|||
id.copy_from_slice(&d[..]);
|
||||
Ok(id.into())
|
||||
} else {
|
||||
let id = rand::thread_rng().gen::<[u8; 32]>();
|
||||
let id = gen_uuid();
|
||||
|
||||
let mut f = std::fs::File::create(id_file.as_path())?;
|
||||
f.write_all(&id[..])?;
|
||||
Ok(id.into())
|
||||
f.write_all(id.as_slice())?;
|
||||
Ok(id)
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue