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use bytes::Bytes;
use obnam::{chunk::Chunk, chunkid::ChunkId, chunkmeta::ChunkMeta, index::Index, store::Store};
use serde::{Deserialize, Serialize};
use std::default::Default;
use std::path::{Path, PathBuf};
use std::sync::Arc;
use structopt::StructOpt;
use tokio::sync::Mutex;
use warp::http::StatusCode;
use warp::Filter;
#[derive(Debug, StructOpt)]
#[structopt(name = "obnam2-server", about = "Backup server")]
struct Opt {
#[structopt(parse(from_os_str))]
config: PathBuf,
}
#[tokio::main]
async fn main() -> anyhow::Result<()> {
let opt = Opt::from_args();
let config = Config::read_config(&opt.config).unwrap();
let config_bare = config.clone();
let config = Arc::new(Mutex::new(config));
let config = warp::any().map(move || Arc::clone(&config));
let index = Arc::new(Mutex::new(Index::default()));
let index = warp::any().map(move || Arc::clone(&index));
let create = warp::post()
.and(warp::path("chunks"))
.and(config.clone())
.and(index.clone())
.and(warp::header("chunk-meta"))
.and(warp::filters::body::bytes())
.and_then(create_chunk);
let fetch = warp::get()
.and(warp::path("chunks"))
.and(warp::path::param())
.and(config.clone())
.and_then(fetch_chunk);
// let search = warp::get()
// .and(warp::path("chunks"))
// .and(warp::query::<HashMap<String, String>>())
// .and(config.clone())
// .and(index.clone())
// .and_then(obnam::routes::search::search_chunks);
// let webroot = create.or(fetch).or(search);
let webroot = create.or(fetch);
warp::serve(webroot)
.tls()
.key_path(config_bare.tls_key)
.cert_path(config_bare.tls_cert)
.run(([127, 0, 0, 1], config_bare.port))
.await;
Ok(())
}
#[derive(Debug, Deserialize, Clone)]
pub struct Config {
pub chunks: PathBuf,
pub port: u16,
pub tls_key: PathBuf,
pub tls_cert: PathBuf,
}
#[derive(Debug, thiserror::Error)]
enum ConfigError {
#[error("Port number {0} too small, would require running as root")]
PortTooSmall(u16),
#[error("Directory for chunks {0} does not exist")]
ChunksDirNotFound(PathBuf),
#[error("TLS certificate {0} does not exist")]
TlsCertNotFound(PathBuf),
#[error("TLS key {0} does not exist")]
TlsKeyNotFound(PathBuf),
}
impl Config {
pub fn read_config(filename: &Path) -> anyhow::Result<Config> {
let config = std::fs::read_to_string(filename)?;
let config: Config = serde_yaml::from_str(&config)?;
config.check()?;
Ok(config)
}
pub fn check(&self) -> anyhow::Result<()> {
if self.port < 1024 {
return Err(ConfigError::PortTooSmall(self.port).into());
}
if !self.chunks.exists() {
return Err(ConfigError::ChunksDirNotFound(self.chunks.clone()).into());
}
if !self.tls_cert.exists() {
return Err(ConfigError::TlsCertNotFound(self.tls_cert.clone()).into());
}
if !self.tls_key.exists() {
return Err(ConfigError::TlsKeyNotFound(self.tls_key.clone()).into());
}
Ok(())
}
}
pub async fn create_chunk(
config: Arc<Mutex<Config>>,
index: Arc<Mutex<Index>>,
meta: String,
data: Bytes,
) -> Result<impl warp::Reply, warp::Rejection> {
let id = ChunkId::new();
let config = config.lock().await;
let store = Store::new(&config.chunks);
let meta: ChunkMeta = match meta.parse() {
Ok(s) => s,
Err(_) => {
eprintln!("bad meta");
return Ok(ChunkResult::BadRequest);
}
};
let chunk = Chunk::new(meta.clone(), data.to_vec());
match store.save(&id, &chunk) {
Ok(_) => (),
Err(_) => {
eprintln!("no meta file");
return Ok(ChunkResult::InternalServerError);
}
}
let mut index = index.lock().await;
index.insert(id.clone(), "sha256", meta.sha256());
if meta.is_generation() {
index.insert_generation(id.clone());
}
Ok(ChunkResult::Created(id))
}
pub async fn fetch_chunk(
id: String,
config: Arc<Mutex<Config>>,
) -> Result<impl warp::Reply, warp::Rejection> {
let config = config.lock().await;
let store = Store::new(&config.chunks);
let id: ChunkId = id.parse().unwrap();
match store.load(&id) {
Ok(chunk) => Ok(ChunkResult::Fetched(chunk)),
Err(_) => Err(warp::reject::not_found()),
}
}
enum ChunkResult {
Created(ChunkId),
Fetched(Chunk),
BadRequest,
InternalServerError,
}
#[derive(Debug, Serialize)]
struct CreatedBody {
chunk_id: String,
}
impl warp::Reply for ChunkResult {
fn into_response(self) -> warp::reply::Response {
match self {
ChunkResult::Created(id) => {
let body = CreatedBody {
chunk_id: format!("{}", id),
};
let body = serde_json::to_string(&body).unwrap();
let mut r = warp::reply::Response::new(body.into());
r.headers_mut().insert(
warp::http::header::CONTENT_TYPE,
warp::http::header::HeaderValue::from_static("application/json"),
);
*r.status_mut() = StatusCode::CREATED;
r
}
ChunkResult::Fetched(chunk) => {
let mut r = warp::reply::Response::new(chunk.data().to_vec().into());
r.headers_mut().insert(
warp::http::header::CONTENT_TYPE,
warp::http::header::HeaderValue::from_static("application/octet-stream"),
);
r.headers_mut().insert(
"chunk-meta",
warp::http::header::HeaderValue::from_str(
&serde_json::to_string(&chunk.meta()).unwrap(),
)
.unwrap(),
);
*r.status_mut() = StatusCode::OK;
r
}
ChunkResult::BadRequest => {
let mut r = warp::reply::Response::new("".into());
r.headers_mut().insert(
warp::http::header::CONTENT_TYPE,
warp::http::header::HeaderValue::from_static("application/json"),
);
*r.status_mut() = StatusCode::BAD_REQUEST;
r
}
ChunkResult::InternalServerError => {
let mut r = warp::reply::Response::new("".into());
r.headers_mut().insert(
warp::http::header::CONTENT_TYPE,
warp::http::header::HeaderValue::from_static("application/json"),
);
*r.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
r
}
}
}
}
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