142 lines
4.8 KiB
Rust
142 lines
4.8 KiB
Rust
use axum::{
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extract::{BodyStream, Extension},
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http::StatusCode,
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response::IntoResponse,
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routing::{get_service, post},
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Router,
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};
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use flate2::read::GzDecoder;
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use futures_util::TryStreamExt;
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use std::collections::HashSet;
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use std::io::ErrorKind;
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use std::net::SocketAddr;
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use std::path::Path;
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use tar::Archive;
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use tokio_util::io::StreamReader;
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use tower_http::{auth::RequireAuthorizationLayer, services::ServeDir, trace::TraceLayer};
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use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
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const STATIC_DIR_NAME: &str = "static";
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#[tokio::main]
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async fn main() {
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// Enable tracing
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tracing_subscriber::registry()
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.with(tracing_subscriber::EnvFilter::new(
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std::env::var("RUST_LOG")
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.unwrap_or_else(|_| "site_backend=debug,tower_http=debug".into()),
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))
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.with(tracing_subscriber::fmt::layer())
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.init();
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// Get required variables from env vars
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let api_key = std::env::var("API_KEY").expect("No API_KEY was provided.");
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let data_dir = std::env::var("DATA_DIR").expect("No DATA_DIR was provided.");
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let static_dir = format!("{}/{}", data_dir, STATIC_DIR_NAME);
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std::fs::create_dir_all(&static_dir);
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let app = Router::new()
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.route(
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"/api/deploy",
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post(post_deploy).layer(RequireAuthorizationLayer::bearer(&api_key)),
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)
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// The fallback option is to serve the actual static files
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.fallback(get_service(ServeDir::new(static_dir)).handle_error(
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|error: std::io::Error| async move {
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(
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StatusCode::INTERNAL_SERVER_ERROR,
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format!("Unhandled internal error: {}", error),
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)
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},
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))
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.layer(TraceLayer::new_for_http())
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.layer(Extension(data_dir));
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let addr = SocketAddr::from(([0, 0, 0, 0], 3000));
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tracing::debug!("listening on {}", addr);
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axum::Server::bind(&addr)
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.serve(app.into_make_service())
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.await
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.unwrap();
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}
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async fn post_deploy(Extension(data_dir): Extension<String>, res: BodyStream) -> impl IntoResponse {
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// This converts a stream into something that implements AsyncRead, which we can then use to
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// asynchronously write the file to disk
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let mut read =
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StreamReader::new(res.map_err(|axum_err| std::io::Error::new(ErrorKind::Other, axum_err)));
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let uuid = uuid::Uuid::new_v4();
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let file_path = Path::new(&data_dir).join(uuid.as_hyphenated().to_string());
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let mut file = tokio::fs::File::create(&file_path).await.unwrap();
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tokio::io::copy(&mut read, &mut file).await;
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// Extract the contents of the tarball synchronously
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match tokio::task::spawn_blocking(move || {
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let file = match std::fs::File::open(file_path) {
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Ok(v) => v,
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Err(_) => return StatusCode::INTERNAL_SERVER_ERROR,
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};
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let tar = GzDecoder::new(file);
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let mut archive = Archive::new(tar);
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let mut paths = HashSet::new();
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let entries = match archive.entries() {
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Ok(e) => e,
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Err(_) => return StatusCode::INTERNAL_SERVER_ERROR,
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};
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// Extract each entry into the output directory
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let static_dir = Path::new(&data_dir).join(STATIC_DIR_NAME);
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for entry_res in entries {
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if let Ok(mut entry) = entry_res {
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if let Err(_) = entry.unpack_in(&static_dir) {
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return StatusCode::INTERNAL_SERVER_ERROR;
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}
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if let Ok(path) = entry.path() {
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paths.insert(path.into_owned());
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}
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} else {
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return StatusCode::INTERNAL_SERVER_ERROR;
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}
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}
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// Remove any old files that weren't present in new archive
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let mut items = vec![];
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// Start by populating the vec with the initial files
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let iter = match static_dir.read_dir() {
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Ok(v) => v,
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Err(_) => return StatusCode::INTERNAL_SERVER_ERROR,
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};
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iter.filter_map(|r| r.ok())
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.for_each(|e| items.push(e.path()));
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// As long as there are still items in the vec, we keep going
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while items.len() > 0 {
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let item = items.pop().unwrap();
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tracing::debug!("{:?}", item);
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if !paths.contains(item.strip_prefix(&static_dir).unwrap()) {
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if item.is_dir() {
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std::fs::remove_dir_all(item);
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} else {
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std::fs::remove_file(item);
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}
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} else if let Ok(iter) = item.read_dir() {
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iter.filter_map(|r| r.ok())
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.for_each(|e| items.push(e.path()));
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}
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}
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StatusCode::OK
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})
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.await
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{
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Ok(s) => s,
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Err(_) => StatusCode::INTERNAL_SERVER_ERROR,
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}
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}
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