Diocrafts
695 lines
26 KiB
Rust
695 lines
26 KiB
Rust
use axum::{
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body::Body,
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extract::{Multipart, Path, State},
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http::{Response, StatusCode, header},
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response::IntoResponse,
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};
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use serde::Serialize;
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use tokio::io::AsyncWriteExt;
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use crate::application::ports::dedup_ports::DedupResultDto;
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use crate::common::di::AppState;
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use crate::interfaces::middleware::auth::AuthUser;
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use std::sync::Arc;
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/// Global application state for dependency injection
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type GlobalState = Arc<AppState>;
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/// Response for hash check endpoint
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#[derive(Debug, Serialize)]
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pub struct HashCheckResponse {
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/// Whether a blob with this hash already exists
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pub exists: bool,
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/// The SHA-256 hash that was checked
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pub hash: String,
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/// If exists, the size of the existing blob
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#[serde(skip_serializing_if = "Option::is_none")]
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pub existing_size: Option<u64>,
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/// If exists, the number of references to this blob
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#[serde(skip_serializing_if = "Option::is_none")]
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pub ref_count: Option<u32>,
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}
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/// Response for upload with dedup endpoint
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#[derive(Debug, Serialize)]
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pub struct DedupUploadResponse {
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/// Whether this was a new file or an existing one
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pub is_new: bool,
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/// The SHA-256 hash of the content
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pub hash: String,
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/// The size of the content in bytes
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pub size: u64,
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/// Bytes saved by deduplication (0 if new file)
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pub bytes_saved: u64,
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/// Current reference count for this blob
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pub ref_count: u32,
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}
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/// Response for dedup stats endpoint
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#[derive(Debug, Serialize)]
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pub struct StatsResponse {
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/// Total number of unique blobs stored
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pub unique_blobs: u64,
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/// Total number of references (files pointing to blobs)
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pub total_references: u64,
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/// Total bytes saved by deduplication
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pub bytes_saved: u64,
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/// Total logical bytes (what users think they have)
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pub total_logical_bytes: u64,
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/// Total physical bytes (actual disk usage)
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pub total_physical_bytes: u64,
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/// Deduplication ratio (logical / physical)
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pub dedup_ratio: f64,
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/// Percentage of storage saved
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pub savings_percentage: f64,
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}
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/// Handler for deduplication-related endpoints
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///
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/// Provides endpoints for:
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/// - Checking if content already exists (by hash)
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/// - Uploading files with automatic deduplication
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/// - Getting deduplication statistics
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pub struct DedupHandler;
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impl DedupHandler {
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/// Check if the authenticated user already has a file with the given hash.
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///
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/// User-scoped: only reveals whether **this user** owns a file that
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/// references the blob — never exposes global existence or ref_count.
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///
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/// GET /api/dedup/check/{hash}
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pub async fn check_hash(
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State(state): State<GlobalState>,
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auth_user: AuthUser,
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Path(hash): Path<String>,
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) -> impl IntoResponse {
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let dedup = &state.core.dedup_service;
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// Validate hash format (SHA-256 = 64 hex chars)
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if hash.len() != 64 || !hash.chars().all(|c| c.is_ascii_hexdigit()) {
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return Response::builder()
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.status(StatusCode::BAD_REQUEST)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(
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r#"{"error": "Invalid hash format. Expected SHA-256 (64 hex characters)"}"#,
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))
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.unwrap()
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.into_response();
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}
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// Only reveal whether THIS user has the blob — no global oracle
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let user_has_it = dedup
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.user_owns_blob_reference(&hash, &auth_user.id.to_string())
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.await;
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if user_has_it {
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// Fetch size from metadata (safe — user owns a reference)
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let size = dedup.get_blob_metadata(&hash).await.map(|m| m.size);
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let response = HashCheckResponse {
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exists: true,
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hash,
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existing_size: size,
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ref_count: None, // Never expose global ref_count
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};
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Response::builder()
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.status(StatusCode::OK)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(serde_json::to_string(&response).unwrap()))
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.unwrap()
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.into_response()
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} else {
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let response = HashCheckResponse {
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exists: false,
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hash,
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existing_size: None,
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ref_count: None,
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};
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Response::builder()
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.status(StatusCode::OK)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(serde_json::to_string(&response).unwrap()))
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.unwrap()
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.into_response()
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}
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}
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/// Upload content with automatic deduplication (streaming).
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///
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/// Spools the upload to a temp file while computing the BLAKE3 hash
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/// incrementally (hash-on-write). Memory usage is constant (~512 KB)
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/// regardless of file size. Then delegates to `store_from_file` with
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/// the pre-computed hash so the file is never re-read for hashing.
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///
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/// POST /api/dedup/upload
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pub async fn upload_with_dedup(
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State(state): State<GlobalState>,
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_auth_user: AuthUser,
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mut multipart: Multipart,
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) -> impl IntoResponse {
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let dedup = &state.core.dedup_service;
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// Process multipart form
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while let Some(field) = multipart.next_field().await.unwrap_or(None) {
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let name = field.name().unwrap_or("").to_string();
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if name == "file" {
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let content_type = field
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.content_type()
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.unwrap_or("application/octet-stream")
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.to_string();
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// ── Spool to temp file + BLAKE3 hash-on-write ────────
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let temp_dir = state.core.path_service.get_root_path().join(".dedup_temp");
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let temp_path = temp_dir.join(format!("dedup-{}", uuid::Uuid::new_v4()));
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let mut total_size: u64 = 0;
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let mut hasher = blake3::Hasher::new();
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let mut field = field;
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let spool_result: Result<(), String> = async {
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let file = tokio::fs::File::create(&temp_path)
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.await
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.map_err(|e| format!("Failed to create temp file: {}", e))?;
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// 512 KB buffer — reduces write syscalls
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let mut writer = tokio::io::BufWriter::with_capacity(524_288, file);
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loop {
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match field.chunk().await {
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Ok(Some(chunk)) => {
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total_size += chunk.len() as u64;
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hasher.update(&chunk);
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writer.write_all(&chunk).await.map_err(|e| {
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format!("Failed to write chunk: {}", e)
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})?;
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}
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Ok(None) => break,
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Err(e) => {
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return Err(format!(
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"Connection lost during upload (received {} bytes): {}",
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total_size, e
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));
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}
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}
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}
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writer
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.flush()
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.await
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.map_err(|e| format!("Failed to flush temp file: {}", e))?;
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Ok(())
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}
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.await;
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if let Err(msg) = spool_result {
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let _ = tokio::fs::remove_file(&temp_path).await;
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tracing::warn!("Dedup upload spool failed: {}", msg);
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return Response::builder()
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.status(StatusCode::BAD_REQUEST)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(format!(
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r#"{{"error": "{}"}}"#,
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msg
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)))
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.unwrap()
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.into_response();
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}
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if total_size == 0 {
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let _ = tokio::fs::remove_file(&temp_path).await;
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return Response::builder()
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.status(StatusCode::BAD_REQUEST)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Empty file not allowed"}"#))
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.unwrap()
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.into_response();
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}
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let hash = hasher.finalize().to_hex().to_string();
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// ── Store with deduplication (pre-computed hash) ──────
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match dedup
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.store_from_file(&temp_path, Some(content_type), Some(hash))
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.await
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{
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Ok(result) => {
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let (is_new, bytes_saved) = match &result {
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DedupResultDto::NewBlob { .. } => (true, 0),
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DedupResultDto::ExistingBlob { saved_bytes, .. } => {
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(false, *saved_bytes)
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}
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};
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let metadata = dedup.get_blob_metadata(result.hash()).await;
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let response = DedupUploadResponse {
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is_new,
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hash: result.hash().to_string(),
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size: result.size(),
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bytes_saved,
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ref_count: metadata.map(|m| m.ref_count).unwrap_or(1),
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};
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tracing::info!(
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"🔗 Dedup upload: hash={}, new={}, saved={}",
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result.hash(),
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is_new,
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bytes_saved
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);
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return Response::builder()
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.status(if is_new {
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StatusCode::CREATED
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} else {
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StatusCode::OK
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})
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(serde_json::to_string(&response).unwrap()))
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.unwrap()
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.into_response();
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}
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Err(e) => {
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let _ = tokio::fs::remove_file(&temp_path).await;
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tracing::error!("Dedup upload failed: {}", e);
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return Response::builder()
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.status(StatusCode::INTERNAL_SERVER_ERROR)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Upload failed"}"#))
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.unwrap()
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.into_response();
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}
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}
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}
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}
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Response::builder()
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.status(StatusCode::BAD_REQUEST)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(
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r#"{"error": "No file field found in multipart form"}"#,
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))
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.unwrap()
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.into_response()
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}
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/// Get deduplication statistics
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///
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/// GET /api/dedup/stats
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///
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/// Returns comprehensive statistics about the deduplication system including:
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/// - Number of unique blobs
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/// - Total references
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/// - Bytes saved
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/// - Deduplication ratio
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pub async fn get_stats(
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State(state): State<GlobalState>,
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auth_user: AuthUser,
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) -> impl IntoResponse {
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// Admin-only — global dedup statistics are sensitive infrastructure data
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if auth_user.role != "admin" {
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return Response::builder()
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.status(StatusCode::FORBIDDEN)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Admin role required"}"#))
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.unwrap()
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.into_response();
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}
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let dedup = &state.core.dedup_service;
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let stats = dedup.get_stats().await;
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// Calculate savings percentage
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let savings_pct = if stats.total_bytes_referenced > 0 {
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(stats.bytes_saved as f64 / stats.total_bytes_referenced as f64) * 100.0
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} else {
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0.0
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};
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let response = StatsResponse {
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unique_blobs: stats.total_blobs,
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total_references: stats.dedup_hits + stats.total_blobs, // Approximation
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bytes_saved: stats.bytes_saved,
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total_logical_bytes: stats.total_bytes_referenced,
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total_physical_bytes: stats.total_bytes_stored,
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dedup_ratio: stats.dedup_ratio,
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savings_percentage: savings_pct,
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};
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Response::builder()
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.status(StatusCode::OK)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(serde_json::to_string(&response).unwrap()))
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.unwrap()
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.into_response()
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}
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/// Retrieve content by hash (user-scoped).
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///
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/// GET /api/dedup/blob/{hash}
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///
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/// Returns the raw content of a blob **only if** the authenticated user
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/// owns at least one file that references it. Returns 404 otherwise
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/// (does not reveal whether the blob exists globally).
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pub async fn get_blob(
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State(state): State<GlobalState>,
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auth_user: AuthUser,
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Path(hash): Path<String>,
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) -> impl IntoResponse {
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let dedup = &state.core.dedup_service;
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// Validate hash format
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if hash.len() != 64 || !hash.chars().all(|c| c.is_ascii_hexdigit()) {
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return Response::builder()
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.status(StatusCode::BAD_REQUEST)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Invalid hash format"}"#))
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.unwrap()
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.into_response();
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}
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// Verify the user owns at least one file referencing this blob
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if !dedup
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.user_owns_blob_reference(&hash, &auth_user.id.to_string())
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.await
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{
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return Response::builder()
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.status(StatusCode::NOT_FOUND)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Blob not found"}"#))
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.unwrap()
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.into_response();
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}
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// Get metadata first for content-type
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let metadata = dedup.get_blob_metadata(&hash).await;
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let content_type = metadata
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.as_ref()
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.and_then(|m| m.content_type.clone())
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.unwrap_or_else(|| "application/octet-stream".to_string());
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// Stream blob in 64 KB chunks — constant memory regardless of size
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let size = match dedup.blob_size(&hash).await {
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Ok(s) => s,
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Err(_) => {
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return Response::builder()
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.status(StatusCode::NOT_FOUND)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Blob not found"}"#))
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.unwrap()
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.into_response();
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}
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};
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match dedup.read_blob_stream(&hash).await {
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Ok(stream) => Response::builder()
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.status(StatusCode::OK)
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.header(header::CONTENT_TYPE, content_type)
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.header(header::CONTENT_LENGTH, size.to_string())
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.header("X-Dedup-Hash", &hash)
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.body(Body::from_stream(stream))
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.unwrap()
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.into_response(),
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Err(_) => Response::builder()
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.status(StatusCode::NOT_FOUND)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Blob not found"}"#))
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.unwrap()
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.into_response(),
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}
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}
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/// Force recalculation of statistics from disk
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///
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/// POST /api/dedup/recalculate
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///
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/// Verifies integrity and returns current statistics.
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/// Useful for health checks and auditing.
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pub async fn recalculate_stats(
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State(state): State<GlobalState>,
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auth_user: AuthUser,
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) -> impl IntoResponse {
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// Admin-only — integrity verification is a privileged operation
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if auth_user.role != "admin" {
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return Response::builder()
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.status(StatusCode::FORBIDDEN)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Admin role required"}"#))
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.unwrap()
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.into_response();
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}
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let dedup = &state.core.dedup_service;
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// Verify integrity first
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match dedup.verify_integrity().await {
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Ok(issues) => {
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if !issues.is_empty() {
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tracing::warn!("Dedup integrity issues found: {:?}", issues);
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}
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}
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Err(e) => {
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tracing::error!("Dedup integrity verification failed: {}", e);
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return Response::builder()
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.status(StatusCode::INTERNAL_SERVER_ERROR)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(r#"{"error": "Verification failed"}"#))
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.unwrap()
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.into_response();
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}
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}
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let stats = dedup.get_stats().await;
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// Calculate savings percentage
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let savings_pct = if stats.total_bytes_referenced > 0 {
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(stats.bytes_saved as f64 / stats.total_bytes_referenced as f64) * 100.0
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} else {
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0.0
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};
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let response = StatsResponse {
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unique_blobs: stats.total_blobs,
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total_references: stats.dedup_hits + stats.total_blobs,
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bytes_saved: stats.bytes_saved,
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total_logical_bytes: stats.total_bytes_referenced,
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total_physical_bytes: stats.total_bytes_stored,
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dedup_ratio: stats.dedup_ratio,
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savings_percentage: savings_pct,
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};
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Response::builder()
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.status(StatusCode::OK)
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.header(header::CONTENT_TYPE, "application/json")
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.body(Body::from(serde_json::to_string(&response).unwrap()))
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.unwrap()
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.into_response()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use tokio::io::AsyncWriteExt;
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|
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/// Verify that the hash-on-write pattern produces the same BLAKE3 hash
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/// as hashing the entire content at once.
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#[tokio::test]
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async fn hash_on_write_matches_full_hash() {
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let content = b"Hello, OxiCloud dedup streaming upload!";
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// 1. Full-content hash (reference)
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let full_hash = blake3::hash(content).to_hex().to_string();
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// 2. Incremental hash-on-write (what the handler does)
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let mut hasher = blake3::Hasher::new();
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// Simulate multiple chunks
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hasher.update(&content[..10]);
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hasher.update(&content[10..25]);
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hasher.update(&content[25..]);
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let incremental_hash = hasher.finalize().to_hex().to_string();
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assert_eq!(full_hash, incremental_hash);
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}
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|
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/// Verify BLAKE3 incremental hashing produces a valid 64-char hex hash.
|
||
#[tokio::test]
|
||
async fn incremental_hash_format_is_valid() {
|
||
let content = vec![0xABu8; 1024 * 1024]; // 1 MB of data
|
||
|
||
let mut hasher = blake3::Hasher::new();
|
||
// Feed in 64 KB chunks like real uploads
|
||
for chunk in content.chunks(65_536) {
|
||
hasher.update(chunk);
|
||
}
|
||
let hash = hasher.finalize().to_hex().to_string();
|
||
|
||
assert_eq!(hash.len(), 64, "BLAKE3 hash should be 64 hex characters");
|
||
assert!(
|
||
hash.chars().all(|c| c.is_ascii_hexdigit()),
|
||
"Hash should only contain hex characters"
|
||
);
|
||
}
|
||
|
||
/// Verify spool-to-disk + BLAKE3 hash-on-write writes correct content
|
||
/// and produces the correct hash.
|
||
#[tokio::test]
|
||
async fn spool_to_temp_file_preserves_content_and_hash() {
|
||
let temp_dir = tempfile::tempdir().unwrap();
|
||
let temp_path = temp_dir.path().join("test-upload.tmp");
|
||
|
||
let content = b"The quick brown fox jumps over the lazy dog";
|
||
let expected_hash = blake3::hash(content).to_hex().to_string();
|
||
|
||
// Simulate the handler's hash-on-write spool loop
|
||
let mut hasher = blake3::Hasher::new();
|
||
let mut total_size: u64 = 0;
|
||
{
|
||
let file = tokio::fs::File::create(&temp_path).await.unwrap();
|
||
let mut writer = tokio::io::BufWriter::with_capacity(524_288, file);
|
||
|
||
// Simulate 3 incoming chunks
|
||
let chunks: &[&[u8]] = &[&content[..10], &content[10..30], &content[30..]];
|
||
for chunk in chunks {
|
||
total_size += chunk.len() as u64;
|
||
hasher.update(chunk);
|
||
writer.write_all(chunk).await.unwrap();
|
||
}
|
||
writer.flush().await.unwrap();
|
||
}
|
||
|
||
let hash = hasher.finalize().to_hex().to_string();
|
||
|
||
// Verify hash matches
|
||
assert_eq!(hash, expected_hash);
|
||
|
||
// Verify total size
|
||
assert_eq!(total_size, content.len() as u64);
|
||
|
||
// Verify file content on disk is identical
|
||
let disk_content = tokio::fs::read(&temp_path).await.unwrap();
|
||
assert_eq!(disk_content, content);
|
||
}
|
||
|
||
/// Verify that an empty upload produces total_size == 0.
|
||
#[tokio::test]
|
||
async fn empty_upload_detected_before_store() {
|
||
let hasher = blake3::Hasher::new();
|
||
let total_size: u64 = 0;
|
||
|
||
// No chunks fed — simulates empty file
|
||
let _hash = hasher.finalize().to_hex().to_string();
|
||
|
||
// The handler checks total_size == 0 and returns 400
|
||
assert_eq!(total_size, 0);
|
||
}
|
||
|
||
/// Verify large payload streaming produces consistent hash
|
||
/// without buffering all content in memory.
|
||
#[tokio::test]
|
||
async fn large_payload_streaming_hash_consistency() {
|
||
let temp_dir = tempfile::tempdir().unwrap();
|
||
let temp_path = temp_dir.path().join("large-upload.tmp");
|
||
|
||
// 5 MB of patterned data
|
||
let chunk_size = 65_536usize; // 64 KB chunks
|
||
let total_chunks = 80; // 80 × 64 KB = 5 MB
|
||
let mut reference_data = Vec::with_capacity(chunk_size * total_chunks);
|
||
|
||
let mut hasher = blake3::Hasher::new();
|
||
let mut total_size: u64 = 0;
|
||
{
|
||
let file = tokio::fs::File::create(&temp_path).await.unwrap();
|
||
let mut writer = tokio::io::BufWriter::with_capacity(524_288, file);
|
||
|
||
for i in 0..total_chunks {
|
||
// Patterned data: each chunk filled with its index byte
|
||
let chunk = vec![(i % 256) as u8; chunk_size];
|
||
reference_data.extend_from_slice(&chunk);
|
||
total_size += chunk.len() as u64;
|
||
hasher.update(&chunk);
|
||
writer.write_all(&chunk).await.unwrap();
|
||
}
|
||
writer.flush().await.unwrap();
|
||
}
|
||
|
||
let streaming_hash = hasher.finalize().to_hex().to_string();
|
||
let reference_hash = blake3::hash(&reference_data).to_hex().to_string();
|
||
|
||
// Hashes match
|
||
assert_eq!(streaming_hash, reference_hash);
|
||
|
||
// File on disk matches
|
||
let file_size = tokio::fs::metadata(&temp_path).await.unwrap().len();
|
||
assert_eq!(file_size, total_size);
|
||
assert_eq!(total_size, (chunk_size * total_chunks) as u64);
|
||
|
||
// Verify file content matches (read back)
|
||
let disk_data = tokio::fs::read(&temp_path).await.unwrap();
|
||
assert_eq!(disk_data, reference_data);
|
||
}
|
||
|
||
/// Verify temp file is cleaned up when spool fails partway through.
|
||
#[tokio::test]
|
||
async fn temp_file_cleanup_on_partial_write() {
|
||
let temp_dir = tempfile::tempdir().unwrap();
|
||
let temp_path = temp_dir.path().join("partial-upload.tmp");
|
||
|
||
// Create the file and write some data
|
||
{
|
||
let file = tokio::fs::File::create(&temp_path).await.unwrap();
|
||
let mut writer = tokio::io::BufWriter::with_capacity(524_288, file);
|
||
writer.write_all(b"partial data").await.unwrap();
|
||
writer.flush().await.unwrap();
|
||
}
|
||
|
||
// File exists before cleanup
|
||
assert!(tokio::fs::try_exists(&temp_path).await.unwrap());
|
||
|
||
// Simulate the handler's error cleanup path
|
||
let _ = tokio::fs::remove_file(&temp_path).await;
|
||
|
||
// File is gone after cleanup
|
||
assert!(!tokio::fs::try_exists(&temp_path).await.unwrap_or(true));
|
||
}
|
||
|
||
/// Verify the DedupUploadResponse serializes correctly for new blobs.
|
||
#[test]
|
||
fn dedup_upload_response_serialization_new_blob() {
|
||
let response = DedupUploadResponse {
|
||
is_new: true,
|
||
hash: "a".repeat(64),
|
||
size: 1024,
|
||
bytes_saved: 0,
|
||
ref_count: 1,
|
||
};
|
||
|
||
let json = serde_json::to_string(&response).unwrap();
|
||
let parsed: serde_json::Value = serde_json::from_str(&json).unwrap();
|
||
|
||
assert_eq!(parsed["is_new"], true);
|
||
assert_eq!(parsed["size"], 1024);
|
||
assert_eq!(parsed["bytes_saved"], 0);
|
||
assert_eq!(parsed["ref_count"], 1);
|
||
}
|
||
|
||
/// Verify the DedupUploadResponse serializes correctly for dedup hits.
|
||
#[test]
|
||
fn dedup_upload_response_serialization_dedup_hit() {
|
||
let response = DedupUploadResponse {
|
||
is_new: false,
|
||
hash: "b".repeat(64),
|
||
size: 2048,
|
||
bytes_saved: 2048,
|
||
ref_count: 3,
|
||
};
|
||
|
||
let json = serde_json::to_string(&response).unwrap();
|
||
let parsed: serde_json::Value = serde_json::from_str(&json).unwrap();
|
||
|
||
assert_eq!(parsed["is_new"], false);
|
||
assert_eq!(parsed["bytes_saved"], 2048);
|
||
assert_eq!(parsed["ref_count"], 3);
|
||
}
|
||
}
|