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-rw-r--r--src/api_server.rs236
-rw-r--r--src/data.rs68
-rw-r--r--src/error.rs6
-rw-r--r--src/membership.rs11
-rw-r--r--src/proto.rs11
-rw-r--r--src/rpc_client.rs47
-rw-r--r--src/server.rs22
7 files changed, 308 insertions, 93 deletions
diff --git a/src/api_server.rs b/src/api_server.rs
index cf70dbdf..c1b4d81d 100644
--- a/src/api_server.rs
+++ b/src/api_server.rs
@@ -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))
+ }
+ }
+}
diff --git a/src/data.rs b/src/data.rs
index f54c4cc1..3c71b782 100644
--- a/src/data.rs
+++ b/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>,
}
diff --git a/src/error.rs b/src/error.rs
index fd717638..30f7dac6 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -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)]
@@ -27,5 +30,8 @@ pub enum Error {
RPCError(String),
#[error(display = "{}", _0)]
+ BadRequest(String),
+
+ #[error(display = "{}", _0)]
Message(String),
}
diff --git a/src/membership.rs b/src/membership.rs
index b7b99bb1..69805f2a 100644
--- a/src/membership.rs
+++ b/src/membership.rs
@@ -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>) {
diff --git a/src/proto.rs b/src/proto.rs
index d1d4fb59..04b8e2b2 100644
--- a/src/proto.rs
+++ b/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>,
+}
diff --git a/src/rpc_client.rs b/src/rpc_client.rs
index 057c19e8..7995cdfa 100644
--- a/src/rpc_client.rs
+++ b/src/rpc_client.rs
@@ -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>,
diff --git a/src/server.rs b/src/server.rs
index 5cac1c70..d5da8c17 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -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)
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 19:18:06 +0000