tatoeba: add port configuration

tatoeba/Cargo.toml

@@ -11,3 +11,4 @@ actix-web = "4.3.1"
 derive_more = "0.99.17"
 mime = "0.3.17"
 reqwest = "0.11.18"
+clap = { version = "4.3.21", features = ["derive"] }

tatoeba/src/main.rs

@@ -1,9 +1,19 @@
 use utils::{error::{Error, Result}, is_human};
 
 use actix_web::{get, http::header, App, HttpRequest, HttpResponse, HttpServer, Responder};
+use clap::Parser;
 
 pub const TATOEBA_API: &str = "https://tatoeba.org/en/api_v0/search";
 
+/// A proxy of the Tatoeba API with no CORS restrictions.
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// The port at which to run.
+    #[arg(short, long, default_value_t=3001)]
+    port: u16,
+}
+
 #[get("/")]
 async fn root(request: HttpRequest) -> Result<impl Responder> {
     let target = format!("{TATOEBA_API}?{}", request.query_string());
@@ -19,7 +29,7 @@ async fn root(request: HttpRequest) -> Result<impl Responder> {
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
     HttpServer::new(|| App::new().service(root))
-        .bind(("127.0.0.1", 3001))?
+        .bind(("127.0.0.1", Args::parse().port))?
         .run()
         .await
 }