commit 66df859bc6f6104c80bcb9e54b574f05b3d6c706
Author: Mikhail Mitrofanov <mmm606@inbox.ru>
Date:   Mon Jun 1 00:33:52 2026 +0300

    Initial commit

diff --git a/.gitignore b/.gitignore
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+ "anyhow",
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+ "indexmap",
+ "log",
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+ "unicode-xid",
+ "wasmparser",
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..1750cd8
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "learn_save"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+axum = { version = "0.8.9", features = ["multipart", ] }
+tokio = { version = "1.52.3", features = ["full"] }
+rand = "0.10.1"
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..03633b3
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,109 @@
+use axum::extract::{DefaultBodyLimit, Path};
+use axum::http::StatusCode;
+use axum::response::IntoResponse;
+use axum::routing::post;
+use axum::{extract::Multipart, routing::get, Router};
+use rand::distr::{Alphanumeric, SampleString};
+use rand::rng;
+use std::os::unix::prelude::MetadataExt;
+use std::path::PathBuf;
+use tokio::fs::File;
+
+#[tokio::main]
+async fn main() {
+    ensure_work_dir();
+
+    let app = Router::new()
+        .route("/generate", get(generate_id))
+        .route("/upload/{id}", post(upload_file))
+        .route("/download/{id}", get(download_file))
+        .route("/{id}/version", get(version))
+        .layer(DefaultBodyLimit::max(50 * 1024 * 1024));
+
+
+    let listener = tokio::net::TcpListener::bind("0.0.0.0:8089").await.unwrap();
+    axum::serve(listener, app).await.unwrap();
+}
+
+async fn generate_id() -> String {
+    Alphanumeric.sample_string(&mut rng(), 24).to_uppercase()
+}
+
+async fn upload_file(
+    Path(id): Path<String>,
+    mut multipart: Multipart,
+) -> Result<impl IntoResponse, StatusCode> {
+    if !validate_id(id.as_str()) {
+        return Err(StatusCode::FORBIDDEN);
+    }
+
+    let file = multipart.next_field().await;
+
+    if let Ok(Some(file)) = file {
+        let data = file
+            .bytes()
+            .await
+            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
+        let mut path = get_dir();
+        path.push(id.clone());
+        if !path.exists() {
+            File::create(path.clone())
+                .await
+                .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+        }
+
+        tokio::fs::write(path.clone(), data)
+            .await
+            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
+        let file = File::open(path).await.unwrap();
+        Ok(file.metadata().await.unwrap().mtime().to_string())
+    } else {
+        Err(StatusCode::BAD_REQUEST)
+    }
+}
+
+async fn download_file(Path(id): Path<String>) -> Result<Vec<u8>, StatusCode> {
+    if !validate_id(id.as_str()) {
+        return Err(StatusCode::BAD_REQUEST);
+    }
+
+    let mut path = get_dir();
+    path.push(id.clone());
+    if let Ok(data) = tokio::fs::read(path).await {
+        Ok(data)
+    } else {
+        Err(StatusCode::NOT_FOUND)
+    }
+}
+
+async fn version(Path(id): Path<String>) -> Result<impl IntoResponse, StatusCode> {
+    if !validate_id(id.as_str()) {
+        return Err(StatusCode::BAD_REQUEST);
+    }
+
+    let dir = get_dir().join(id);
+    let meta = tokio::fs::metadata(dir).await
+        .map_err(|_| StatusCode::BAD_REQUEST)?;
+
+    Ok(meta.mtime().to_string())
+}
+
+fn ensure_work_dir() {
+    let store_dir = get_dir();
+
+    if !store_dir.exists() {
+        std::fs::create_dir_all(&store_dir).unwrap();
+    }
+}
+#[inline]
+fn get_dir() -> PathBuf {
+    PathBuf::from("/var/lib/learn_save")
+}
+
+#[inline]
+fn validate_id(id: &str) -> bool {
+    id.len() == 24
+        && id.chars().all(|c| c.is_ascii_alphanumeric())
+}