omni-stream 0.2.0

Single-binary streaming storage proxy: axum + tokio + aws-sdk-s3 backend with an embedded React SPA, serving local FS or S3-compatible object storage behind one port.
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pub mod factory;
pub mod local;
pub mod s3;

use std::pin::Pin;

use async_trait::async_trait;
use bytes::Bytes;
use futures::Stream;
use serde::Serialize;

use crate::error::AppError;

pub type ByteStream = Pin<Box<dyn Stream<Item = Result<Bytes, std::io::Error>> + Send>>;

#[derive(Debug, Clone, Default)]
pub struct GetOptions {
  pub range: Option<String>,
}

pub struct StorageResponse {
  pub body: ByteStream,
  pub content_length: Option<u64>,
  pub content_type: Option<String>,
  pub etag: Option<String>,
  pub last_modified: Option<String>,
  pub content_range: Option<String>,
  pub is_partial: bool,
}

#[derive(Debug, Clone, Serialize)]
pub struct FileMeta {
  pub path: String,
  pub size: u64,
  pub etag: Option<String>,
  pub content_type: Option<String>,
  pub last_modified: Option<String>,
  pub is_dir: bool,
}

#[derive(Debug, Clone, Serialize)]
pub struct FileEntry {
  pub key: String,
  pub size: u64,
  pub last_modified: Option<String>,
  pub is_dir: bool,
}

#[derive(Debug, Clone, Default, Serialize)]
pub struct ListResult {
  pub entries: Vec<FileEntry>,
  pub next_token: Option<String>,
}

#[async_trait]
pub trait StorageBackend: Send + Sync {
  async fn get_file(&self, path: &str, opts: GetOptions) -> Result<StorageResponse, AppError>;
  async fn list_files(&self, prefix: &str, token: Option<String>) -> Result<ListResult, AppError>;
  async fn stat(&self, path: &str) -> Result<FileMeta, AppError>;
}