Serve files

.gitignore

@@ -1,2 +1,3 @@
 /target
 .idea
+storage

Cargo.toml

@@ -6,3 +6,8 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = { version = "3.1.6", features = ["derive", "env"] }
+actix-web = "4"
+actix-files = "0.6"
+env_logger = "0.9.0"
+log = "0.4"

src/main.rs

@@ -1,3 +1,97 @@
-fn main() {
-    println!("Hello, world!");
+use std::path::{Path, PathBuf};
+
+use actix_files::{Files, NamedFile};
+use actix_web::{App, HttpResponse, HttpServer};
+use actix_web::dev::{fn_service, ServiceRequest, ServiceResponse};
+use actix_web::middleware::Logger;
+use clap::Parser;
+
+/// Simple pages server
+#[derive(Parser, Debug, Clone)]
+#[clap(author, version, about, long_about = None)]
+struct Args {
+    /// The address and port this server will listen on
+    #[clap(short, long, env, default_value = "0.0.0.0:8000")]
+    listen_address: String,
+
+    /// The place wheres files to serve are hosted
+    #[clap(short, long, env)]
+    files_path: String,
+
+    /// Update token
+    #[clap(short, long, env)]
+    update_token: String,
+
+    /// The IP addresses allowed to perform updates
+    #[clap(short, long, env, default_value = "*")]
+    allowed_ips_for_update: String,
+
+    /// Index file name
+    #[clap(short, long, env, default_value = "index.html")]
+    index_file: String,
+
+    /// Handle for not found files. By default, a basic message is returned
+    #[clap(short, long, env, default_value = "")]
+    not_found_file: String,
 }
+
+impl Args {
+    pub fn storage_path(&self) -> &Path {
+        Path::new(&self.files_path)
+    }
+
+    pub fn default_handler_path(&self) -> Option<PathBuf> {
+        match self.not_found_file.is_empty() {
+            true => None,
+            false => Some(self.storage_path().join(&self.not_found_file))
+        }
+    }
+}
+
+static mut ARGS: Option<Args> = None;
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    let args: Args = Args::parse();
+    env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));
+
+    log::info!("starting HTTP server at {}", args.listen_address);
+    let listen_address = args.listen_address.to_string();
+
+    if !args.storage_path().exists() {
+        panic!("Specified files path does not exists!");
+    }
+
+    unsafe { ARGS = Some(args.clone()); }
+
+    HttpServer::new(move || {
+        App::new()
+
+            // Serve a tree of static files at the web root and specify the index file.
+            // Note that the root path should always be defined as the last item. The paths are
+            // resolved in the order they are defined. If this would be placed before the `/images`
+            // path then the service for the static images would never be reached.
+            .service(Files::new("/", &args.files_path)
+
+                .index_file(&args.index_file)
+
+                .default_handler(fn_service(|req: ServiceRequest| async {
+                    let (req, _) = req.into_parts();
+                    if let Some(h) = unsafe { ARGS.as_ref().unwrap() }.default_handler_path().as_ref() {
+                        let file = NamedFile::open_async(h).await?;
+                        let res = file.into_response(&req);
+                        Ok(ServiceResponse::new(req, res))
+                    } else {
+                        Ok(ServiceResponse::new(req, HttpResponse::NotFound()
+                            .body("404 Not found")))
+                    }
+                }))
+            )
+
+            // Enable the logger.
+            .wrap(Logger::default())
+    })
+        .bind(listen_address)?
+        .run()
+        .await
+}