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#![recursion_limit = "512"] //! Helper and convenience macros for Actix-web. //! //! ## Runtime Setup //! //! - [main](attr.main.html) //! //! ## Resource Macros: //! //! - [get](attr.get.html) //! - [post](attr.post.html) //! - [put](attr.put.html) //! - [delete](attr.delete.html) //! - [head](attr.head.html) //! - [connect](attr.connect.html) //! - [options](attr.options.html) //! - [trace](attr.trace.html) //! - [patch](attr.patch.html) //! //! ### Attributes: //! //! - `"path"` - Raw literal string with path for which to register handle. Mandatory. //! - `guard="function_name"` - Registers function as guard using `actix_web::guard::fn_guard` //! - `wrap="Middleware"` - Registers a resource middleware. //! //! ### Notes //! //! Function name can be specified as any expression that is going to be accessible to the generate //! code (e.g `my_guard` or `my_module::my_guard`) //! //! ### Example: //! //! ```rust //! use actix_web::HttpResponse; //! use actix_web_codegen::get; //! //! #[get("/test")] //! async fn async_test() -> Result<HttpResponse, actix_web::Error> { //! Ok(HttpResponse::Ok().finish()) //! } //! ``` extern crate proc_macro; mod route; use proc_macro::TokenStream; /// Creates route handler with `GET` method guard. /// /// Syntax: `#[get("path"[, attributes])]` /// /// ## Attributes: /// /// - `"path"` - Raw literal string with path for which to register handler. Mandatory. /// - `guard="function_name"` - Registers function as guard using `actix_web::guard::fn_guard` /// - `wrap="Middleware"` - Registers a resource middleware. #[proc_macro_attribute] pub fn get(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Get) } /// Creates route handler with `POST` method guard. /// /// Syntax: `#[post("path"[, attributes])]` /// /// Attributes are the same as in [get](attr.get.html) #[proc_macro_attribute] pub fn post(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Post) } /// Creates route handler with `PUT` method guard. /// /// Syntax: `#[put("path"[, attributes])]` /// /// Attributes are the same as in [get](attr.get.html) #[proc_macro_attribute] pub fn put(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Put) } /// Creates route handler with `DELETE` method guard. /// /// Syntax: `#[delete("path"[, attributes])]` /// /// Attributes are the same as in [get](attr.get.html) #[proc_macro_attribute] pub fn delete(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Delete) } /// Creates route handler with `HEAD` method guard. /// /// Syntax: `#[head("path"[, attributes])]` /// /// Attributes are the same as in [head](attr.head.html) #[proc_macro_attribute] pub fn head(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Head) } /// Creates route handler with `CONNECT` method guard. /// /// Syntax: `#[connect("path"[, attributes])]` /// /// Attributes are the same as in [connect](attr.connect.html) #[proc_macro_attribute] pub fn connect(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Connect) } /// Creates route handler with `OPTIONS` method guard. /// /// Syntax: `#[options("path"[, attributes])]` /// /// Attributes are the same as in [options](attr.options.html) #[proc_macro_attribute] pub fn options(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Options) } /// Creates route handler with `TRACE` method guard. /// /// Syntax: `#[trace("path"[, attributes])]` /// /// Attributes are the same as in [trace](attr.trace.html) #[proc_macro_attribute] pub fn trace(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Trace) } /// Creates route handler with `PATCH` method guard. /// /// Syntax: `#[patch("path"[, attributes])]` /// /// Attributes are the same as in [patch](attr.patch.html) #[proc_macro_attribute] pub fn patch(args: TokenStream, input: TokenStream) -> TokenStream { route::generate(args, input, route::GuardType::Patch) } /// Marks async main function as the actix system entry-point. /// /// ## Usage /// /// ```rust /// #[actix_web::main] /// async fn main() { /// async { println!("Hello world"); }.await /// } /// ``` #[proc_macro_attribute] #[cfg(not(test))] // Work around for rust-lang/rust#62127 pub fn main(_: TokenStream, item: TokenStream) -> TokenStream { use quote::quote; let mut input = syn::parse_macro_input!(item as syn::ItemFn); let attrs = &input.attrs; let vis = &input.vis; let sig = &mut input.sig; let body = &input.block; let name = &sig.ident; if sig.asyncness.is_none() { return syn::Error::new_spanned(sig.fn_token, "only async fn is supported") .to_compile_error() .into(); } sig.asyncness = None; (quote! { #(#attrs)* #vis #sig { actix_web::rt::System::new(stringify!(#name)) .block_on(async move { #body }) } }) .into() }