1 files changed, 347 insertions, 0 deletions

diff --git a/rs/server/src/main.rs b/rs/server/src/main.rs
new file mode 100644
index 0000000..8fe1d16
--- /dev/null
+++ b/rs/server/src/main.rs
@@ -0,0 +1,347 @@
+use std::collections::HashMap;
+
+use awscreds::Credentials;
+use axum::extract::rejection;
+use axum::extract::FromRequest;
+use axum::extract::Path;
+use axum::http::header;
+use axum::http::HeaderMap;
+use axum::http::HeaderValue;
+use axum::response::Response;
+use axum::Json;
+use chrono::DateTime;
+use chrono::Utc;
+use common::HexByte;
+use common::Operation;
+use s3::Bucket;
+use serde::de;
+use serde::de::DeserializeOwned;
+use serde::Deserialize;
+use serde::Serialize;
+use tower_service::Service;
+
+use axum::{
+    async_trait,
+    extract::{FromRequestParts, OriginalUri, Request},
+    http::{request::Parts, StatusCode, Uri},
+    response::IntoResponse,
+    routing::{any, get, post, put},
+    Extension, Router,
+};
+
+#[derive(Clone)]
+struct RepositoryName(String);
+
+struct RepositoryNameRejection;
+
+impl IntoResponse for RepositoryNameRejection {
+    fn into_response(self) -> Response {
+        (StatusCode::INTERNAL_SERVER_ERROR, "Missing repository name").into_response()
+    }
+}
+
+#[async_trait]
+impl<S: Send + Sync> FromRequestParts<S> for RepositoryName {
+    type Rejection = RepositoryNameRejection;
+
+    async fn from_request_parts(parts: &mut Parts, state: &S) -> Result<Self, Self::Rejection> {
+        let Ok(Extension(repo_name)) = Extension::<Self>::from_request_parts(parts, state).await
+        else {
+            return Err(RepositoryNameRejection);
+        };
+        Ok(repo_name)
+    }
+}
+
+#[tokio::main]
+async fn main() {
+    // run our app with hyper, listening globally on port 3000
+    let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
+    let mut app = Router::new()
+        .route("/batch", post(batch))
+        .route("/:oid0/:oid1/:oid", get(obj_download))
+        .route("/:oid0/:oid1/:oid", put(obj_upload));
+    axum::serve(
+        listener,
+        any(|mut req: Request| async move {
+            let uri = req.uri();
+            let original_uri = OriginalUri(uri.clone());
+
+            let path_and_query = uri.path_and_query().unwrap();
+            let Some((repo, path)) = path_and_query.path().split_once("/info/lfs/objects") else {
+                return Ok(StatusCode::NOT_FOUND.into_response());
+            };
+            let repo = repo
+                .trim_start_matches('/')
+                .trim_end_matches('/')
+                .to_string();
+            if !path.starts_with("/") || !repo.ends_with(".git") {
+                return Ok(StatusCode::NOT_FOUND.into_response());
+            }
+
+            let mut parts = uri.clone().into_parts();
+            parts.path_and_query = match path_and_query.query() {
+                None => path.try_into().ok(),
+                Some(q) => format!("{path}?{q}").try_into().ok(),
+            };
+            let new_uri = Uri::from_parts(parts).unwrap();
+
+            *req.uri_mut() = new_uri;
+            req.extensions_mut().insert(original_uri);
+            req.extensions_mut().insert(RepositoryName(repo));
+
+            app.call(req).await
+        }),
+    )
+    .await
+    .unwrap();
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone, Copy)]
+enum TransferAdapter {
+    #[serde(rename = "basic")]
+    Basic,
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone, Copy)]
+enum HashAlgo {
+    #[serde(rename = "sha256")]
+    Sha256,
+}
+
+impl Default for HashAlgo {
+    fn default() -> Self {
+        Self::Sha256
+    }
+}
+
+type Oid = common::Digest<32>;
+
+#[derive(Debug, Deserialize, Clone)]
+struct BatchRequestObject {
+    oid: Oid,
+    size: i64,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+struct BatchRef {
+    name: String,
+}
+
+fn default_transfers() -> Vec<TransferAdapter> {
+    vec![TransferAdapter::Basic]
+}
+
+#[derive(Deserialize)]
+struct BatchRequest {
+    operation: common::Operation,
+    #[serde(default = "default_transfers")]
+    transfers: Vec<TransferAdapter>,
+    #[serde(rename = "ref")]
+    reference: Option<BatchRef>,
+    objects: Vec<BatchRequestObject>,
+    #[serde(default)]
+    hash_algo: HashAlgo,
+}
+
+#[derive(Clone)]
+struct GitLfsJson<T>(Json<T>);
+
+const LFS_MIME: &'static str = "application/vnd.git-lfs+json";
+
+enum GitLfsJsonRejection {
+    Json(rejection::JsonRejection),
+    MissingGitLfsJsonContentType,
+}
+
+impl IntoResponse for GitLfsJsonRejection {
+    fn into_response(self) -> Response {
+        (
+            StatusCode::UNSUPPORTED_MEDIA_TYPE,
+            format!("Expected request with `Content-Type: {LFS_MIME}`"),
+        )
+            .into_response()
+    }
+}
+
+fn is_git_lfs_json_mimetype(mimetype: &str) -> bool {
+    let Ok(mime) = mimetype.parse::<mime::Mime>() else {
+        return false;
+    };
+    if mime.type_() != mime::APPLICATION
+        || mime.subtype() != "vnd.git-lfs"
+        || mime.suffix() != Some(mime::JSON)
+    {
+        return false;
+    }
+    match mime.get_param(mime::CHARSET) {
+        Some(mime::UTF_8) | None => true,
+        Some(_) => false,
+    }
+}
+
+fn has_git_lfs_json_content_type(req: &Request) -> bool {
+    let Some(content_type) = req.headers().get(header::CONTENT_TYPE) else {
+        return false;
+    };
+    let Ok(content_type) = content_type.to_str() else {
+        return false;
+    };
+    return is_git_lfs_json_mimetype(content_type);
+}
+
+#[async_trait]
+impl<T, S> FromRequest<S> for GitLfsJson<T>
+where
+    T: DeserializeOwned,
+    S: Send + Sync,
+{
+    type Rejection = GitLfsJsonRejection;
+
+    async fn from_request(req: Request, state: &S) -> Result<Self, Self::Rejection> {
+        if !has_git_lfs_json_content_type(&req) {
+            return Err(GitLfsJsonRejection::MissingGitLfsJsonContentType);
+        }
+        Json::<T>::from_request(req, state)
+            .await
+            .map(GitLfsJson)
+            .map_err(GitLfsJsonRejection::Json)
+    }
+}
+
+impl<T: Serialize> IntoResponse for GitLfsJson<T> {
+    fn into_response(self) -> Response {
+        let GitLfsJson(json) = self;
+        let mut resp = json.into_response();
+        resp.headers_mut().insert(
+            header::CONTENT_TYPE,
+            HeaderValue::from_static("application/vnd.git-lfs+json"),
+        );
+        resp
+    }
+}
+
+#[derive(Debug, Serialize, Clone)]
+struct BatchResponseObjectAction {
+    href: String,
+    #[serde(skip_serializing_if = "HashMap::is_empty")]
+    header: HashMap<String, String>,
+    expires_at: DateTime<Utc>,
+}
+
+#[derive(Debug, Serialize, Clone)]
+struct BatchResponseObjectActions {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    upload: Option<BatchResponseObjectAction>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    download: Option<BatchResponseObjectAction>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    verify: Option<BatchResponseObjectAction>,
+}
+
+#[derive(Debug, Serialize, Clone)]
+struct BatchResponseObject {
+    oid: Oid,
+    size: i64,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    authenticated: Option<bool>,
+}
+
+#[derive(Debug, Serialize, Clone)]
+struct BatchResponse {
+    transfer: TransferAdapter,
+    objects: Vec<BatchResponseObject>,
+    hash_algo: HashAlgo,
+}
+
+//fn handle_download_object(repo: &str, obj: &BatchRequestObject) {
+//    let (oid0, oid1) = (HexByte(obj.oid[0]), HexByte(obj.oid[1]));
+//    let full_path = format!("{repo}/lfs/objects/{}/{}/{}", oid0, oid1, obj.oid);
+//
+//    let bucket_anme = "asdfasdf";
+//    let region = s3::Region::Custom {
+//        region: "nl-ams".to_string(),
+//        endpoint: "rg.nl-ams.swc.cloud".to_string()
+//    };
+//    let credentials = Credentials::new(None, None, None, None, None).unwrap();
+//    let bucket = Bucket::new(bucket_anme, region, credentials).unwrap();
+//}
+
+async fn batch(
+    header: HeaderMap,
+    RepositoryName(repo): RepositoryName,
+    GitLfsJson(Json(payload)): GitLfsJson<BatchRequest>,
+) -> Response {
+    if !header
+        .get_all("Accept")
+        .iter()
+        .filter_map(|v| v.to_str().ok())
+        .any(is_git_lfs_json_mimetype)
+    {
+        return (
+            StatusCode::NOT_ACCEPTABLE,
+            format!("Expected `{LFS_MIME}` (with UTF-8 charset) in list of acceptable response media types"),
+        ).into_response();
+    }
+
+    if payload.hash_algo != HashAlgo::Sha256 {
+        return (
+            StatusCode::CONFLICT,
+            "Unsupported hashing algorithm speicifed",
+        )
+            .into_response();
+    }
+    if !payload.transfers.is_empty() && !payload.transfers.contains(&TransferAdapter::Basic) {
+        return (
+            StatusCode::CONFLICT,
+            "Unsupported transfer adapter specified (supported: basic)",
+        )
+            .into_response();
+    }
+
+    let resp: BatchResponse;
+    for obj in payload.objects {
+//        match payload.operation {
+//            Operation::Download => resp.objects.push(handle_download_object(repo, obj));,
+//            Operation::Upload => resp.objects.push(handle_upload_object(repo, obj)),
+//        };
+    }
+
+    format!("hi from {repo}\n").into_response()
+}
+
+#[derive(Deserialize, Copy, Clone)]
+#[serde(remote = "Self")]
+struct FileParams {
+    oid0: HexByte,
+    oid1: HexByte,
+    oid: Oid,
+}
+
+impl<'de> Deserialize<'de> for FileParams {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let unchecked @ FileParams {
+            oid0: HexByte(oid0),
+            oid1: HexByte(oid1),
+            oid,
+        } = FileParams::deserialize(deserializer)?;
+        if oid0 != oid.as_bytes()[0] {
+            return Err(de::Error::custom(
+                "first OID path part does not match first byte of full OID",
+            ));
+        }
+        if oid1 != oid.as_bytes()[1] {
+            return Err(de::Error::custom(
+                "second OID path part does not match first byte of full OID",
+            ));
+        }
+        Ok(unchecked)
+    }
+}
+
+async fn obj_download(Path(FileParams { oid0, oid1, oid }): Path<FileParams>) {}
+
+async fn obj_upload(Path(FileParams { oid0, oid1, oid }): Path<FileParams>) {}