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use axum::body::{Body, Bytes, StreamBody};
use axum::extract::{BodyStream, FromRequest, Path, Query, RequestParts, TypedHeader};
use axum::handler::Handler;
use axum::headers::authorization::Basic;
use axum::headers::Authorization;
use axum::response::{IntoResponse, Response};
use axum::routing::{get, head, post, put};
use axum::{async_trait, Router};
use hyper::StatusCode;
use serde::Serialize;
use sha2::{Digest, Sha256};
use std::path::PathBuf;
use tokio::io::AsyncWriteExt;
use tokio_util::io::ReaderStream;
use crate::util::gen_alphanumeric;
const REGISTRY_PATH: &'static str = "./data/registry";
pub fn registry_service() -> Router {
Router::new()
// The docker API requires this trailing slash
.nest("/v2/", registry_api_v2())
.fallback(fallback.into_service())
}
fn registry_api_v2() -> Router {
Router::new()
.route("/", get(root_handler))
.route("/:name/blobs/:digest", head(blob_check).get(get_blob))
.route("/:name/blobs/uploads/", post(blob_upload))
.route(
"/:name/blobs/uploads/:uuid",
put(put_handler).patch(handle_upload),
)
.route(
"/:name/manifests/:reference",
get(get_manifest).put(put_manifest),
)
}
async fn fallback(request: axum::http::Request<Body>) -> impl IntoResponse {
// for debugging
println!("no route for {} {}", request.method(), request.uri());
StatusCode::NOT_FOUND
}
type AuthorizationHeader = TypedHeader<Authorization<Basic>>;
struct RegistryAuth;
#[async_trait]
impl<B> FromRequest<B> for RegistryAuth
where
B: Send,
{
type Rejection = Response<axum::body::Full<Bytes>>;
async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> {
let TypedHeader(Authorization(_basic)) =
AuthorizationHeader::from_request(req).await.map_err(|_| {
let err = RegistryErrors {
errors: vec![RegistryError {
code: "UNAUTHORIZED".to_string(),
message: "please log in".to_string(),
detail: serde_json::Value::Null,
}],
};
Response::builder()
.status(StatusCode::UNAUTHORIZED)
.header("Docker-Distribution-API-Version", "registry/2.0")
.header("WWW-Authenticate", "Basic")
.body(axum::body::Full::from(serde_json::to_vec(&err).unwrap()))
.unwrap()
})?;
Ok(RegistryAuth)
}
}
async fn root_handler(_auth: RegistryAuth) -> impl IntoResponse {
// root should return 200 OK to confirm api compliance
Response::builder()
.status(StatusCode::OK)
.header("Docker-Distribution-API-Version", "registry/2.0")
.body(Body::empty())
.unwrap()
}
#[derive(Serialize)]
pub struct RegistryErrors {
errors: Vec<RegistryError>,
}
#[derive(Serialize)]
pub struct RegistryError {
code: String,
message: String,
detail: serde_json::Value,
}
async fn blob_check(
Path((_repository_name, raw_digest)): Path<(String, String)>,
) -> impl IntoResponse {
let digest = raw_digest.strip_prefix("sha256:").unwrap();
let blob_path = PathBuf::from(REGISTRY_PATH).join("sha256").join(&digest);
if blob_path.exists() {
StatusCode::OK
} else {
StatusCode::NOT_FOUND
}
}
async fn get_blob(
Path((_repository_name, raw_digest)): Path<(String, String)>,
) -> impl IntoResponse {
let digest = raw_digest.strip_prefix("sha256:").unwrap();
let blob_path = PathBuf::from(REGISTRY_PATH).join("sha256").join(&digest);
if !blob_path.exists() {
return Err(StatusCode::NOT_FOUND);
}
let file = tokio::fs::File::open(&blob_path).await.unwrap();
let reader_stream = ReaderStream::new(file);
let stream_body = StreamBody::new(reader_stream);
Ok(stream_body)
}
async fn blob_upload(Path(repository_name): Path<String>) -> impl IntoResponse {
let uuid = gen_alphanumeric(16);
tokio::fs::File::create(PathBuf::from(REGISTRY_PATH).join("uploads").join(&uuid))
.await
.unwrap();
Response::builder()
.status(StatusCode::ACCEPTED)
.header(
"Location",
format!("/v2/{}/blobs/uploads/{}", repository_name, uuid),
)
.header("Docker-Upload-UUID", uuid)
.header("Range", "bytes=0-0")
.body(Body::empty())
.unwrap()
}
use futures::StreamExt;
async fn handle_upload(
Path((repository_name, uuid)): Path<(String, String)>,
mut stream: BodyStream,
) -> impl IntoResponse {
// let content_length = headers.get("Content-Length").unwrap();
// let content_range = headers.get("Content-Range").unwrap();
// let content_type = headers.get("Content-Type").unwrap();
// assert!(content_type == "application/octet-stream");
let mut len = 0;
let upload_path = PathBuf::from(REGISTRY_PATH).join("uploads").join(&uuid);
let mut file = tokio::fs::OpenOptions::new()
.read(false)
.write(true)
.append(true)
.create(false)
.open(upload_path)
.await
.unwrap();
while let Some(Ok(chunk)) = stream.next().await {
let n_bytes = file.write(&chunk).await.unwrap();
len += n_bytes;
}
Response::builder()
.status(StatusCode::ACCEPTED)
.header(
"Location",
format!("/v2/{}/blobs/uploads/{}", repository_name, uuid),
)
.header("Docker-Upload-UUID", uuid)
.header("Range", format!("0-{}", len))
.body(Body::empty())
.unwrap()
}
use serde::Deserialize;
#[derive(Deserialize)]
struct UploadParams {
digest: String,
}
async fn put_handler(
Path((repository_name, uuid)): Path<(String, String)>,
Query(params): Query<UploadParams>,
mut stream: BodyStream,
) -> impl IntoResponse {
let mut _len = 0;
let upload_path = PathBuf::from(REGISTRY_PATH).join("uploads").join(&uuid);
let mut file = tokio::fs::OpenOptions::new()
.read(false)
.write(true)
.append(true)
.create(false)
.open(&upload_path)
.await
.unwrap();
while let Some(Ok(chunk)) = stream.next().await {
let n_bytes = file.write(&chunk).await.unwrap();
_len += n_bytes;
}
let digest = params.digest.strip_prefix("sha256:").unwrap();
// TODO: check the digest
let target_path = PathBuf::from(REGISTRY_PATH).join("sha256").join(&digest);
tokio::fs::rename(&upload_path, &target_path).await.unwrap();
Response::builder()
.status(StatusCode::CREATED)
.header(
"Location",
format!("/v2/{}/blobs/{}", repository_name, digest),
)
.header("Docker-Upload-UUID", uuid)
// .header("Range", format!("0-{}", len))
.header("Docker-Content-Digest", digest)
.body(Body::empty())
.unwrap()
}
async fn get_manifest(
Path((repository_name, reference)): Path<(String, String)>,
) -> impl IntoResponse {
let manifest_path = PathBuf::from(REGISTRY_PATH)
.join("manifests")
.join(&repository_name)
.join(&reference)
.with_extension("json");
let data = tokio::fs::read(&manifest_path).await.unwrap();
let manifest: serde_json::Map<String, serde_json::Value> =
serde_json::from_slice(&data).unwrap();
let media_type = manifest.get("mediaType").unwrap().as_str().unwrap();
Response::builder()
.status(StatusCode::OK)
.header("Content-Type", media_type)
.body(axum::body::Full::from(data))
.unwrap()
}
async fn put_manifest(
Path((repository_name, reference)): Path<(String, String)>,
mut stream: BodyStream,
) -> impl IntoResponse {
let repository_dir = PathBuf::from(REGISTRY_PATH)
.join("manifests")
.join(&repository_name);
tokio::fs::create_dir_all(&repository_dir).await.unwrap();
let mut hasher = Sha256::new();
let manifest_path = repository_dir.join(&reference).with_extension("json");
{
let mut file = tokio::fs::OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(&manifest_path)
.await
.unwrap();
while let Some(Ok(chunk)) = stream.next().await {
hasher.update(&chunk);
file.write(&chunk).await.unwrap();
}
}
let digest = hasher.finalize();
// TODO: store content-adressable manifests separately
let content_digest = format!("sha256:{:x}", digest);
let digest_path = repository_dir.join(&content_digest).with_extension("json");
tokio::fs::copy(manifest_path, digest_path).await.unwrap();
Response::builder()
.status(StatusCode::CREATED)
.header(
"Location",
format!("/v2/{}/manifests/{}", repository_name, reference),
)
.header("Docker-Content-Digest", content_digest)
.body(Body::empty())
.unwrap()
}
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