This commit is contained in:
Greg Johnston 2024-01-12 12:40:08 -05:00
parent 15b04a8a85
commit def4be80b2
2 changed files with 61 additions and 8 deletions

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@ -1,9 +1,69 @@
#![forbid(unsafe_code)] #![forbid(unsafe_code)]
#![deny(missing_docs)]
//! This crate contains the default implementation of the #[macro@crate::server] macro without additional context from the server.
//! See the [server_fn_macro] crate for more information.
use proc_macro::TokenStream; use proc_macro::TokenStream;
use server_fn_macro::server_macro_impl; use server_fn_macro::server_macro_impl;
use syn::__private::ToTokens; use syn::__private::ToTokens;
/// Declares that a function is a [server function](https://docs.rs/server_fn/).
/// This means that its body will only run on the server, i.e., when the `ssr`
/// feature is enabled on this crate.
///
/// ## Usage
/// ```rust,ignore
/// #[server]
/// pub async fn blog_posts(
/// category: String,
/// ) -> Result<Vec<BlogPost>, ServerFnError> {
/// let posts = load_posts(&category).await?;
/// // maybe do some other work
/// Ok(posts)
/// }
/// ```
///
/// ## Named Arguments
///
/// You can any combination of the following named arguments:
/// - `name`: sets the identifier for the server functions type, which is a struct created
/// to hold the arguments (defaults to the function identifier in PascalCase)
/// - `prefix`: a prefix at which the server function handler will be mounted (defaults to `/api`)
/// - `endpoint`: specifies the exact path at which the server function handler will be mounted,
/// relative to the prefix (defaults to the function name followed by unique hash)
/// - `input`: the encoding for the arguments (defaults to `PostUrl`)
/// - `output`: the encoding for the response (defaults to `Json`)
/// - `encoding`: (legacy, may be deprecated in future) specifies the encoding, which may be one
/// of the following (not case sensitive)
/// - `"Url"`: `POST` request with URL-encoded arguments and JSON response
/// - `"GetUrl"`: `GET` request with URL-encoded arguments and JSON response
/// - `"Cbor"`: `POST` request with CBOR-encoded arguments and response
/// - `"GetCbor"`: `GET` request with URL-encoded arguments and CBOR response
/// ```rust,ignore
/// #[server(
/// name = SomeStructName,
/// prefix = "/my_api",
/// endpoint = "my_fn",
/// input = Cbor,
/// output = Json
/// )]
/// pub async fn my_wacky_server_fn(input: Vec<String>) -> Result<usize, ServerFnError> {
/// todo!()
/// }
///
/// // expands to
/// #[derive(Deserialize, Serialize)]
/// struct SomeStructName {
/// input: Vec<String>
/// }
///
/// impl ServerFn for SomeStructName {
/// const PATH: &'static str = "/my_api/my_fn";
///
/// // etc.
/// }
/// ```
#[proc_macro_attribute] #[proc_macro_attribute]
pub fn server(args: proc_macro::TokenStream, s: TokenStream) -> TokenStream { pub fn server(args: proc_macro::TokenStream, s: TokenStream) -> TokenStream {
match server_macro_impl( match server_macro_impl(

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@ -16,14 +16,7 @@ use syn::{
Type, *, Type, *,
}; };
/// The implementation of the `server_fn` macro. /// The implementation of the `server` macro.
/// To allow the macro to accept a custom context from the server, pass a custom server context to this function.
/// **The Context comes from the server.** Optionally, the first argument of a server function
/// can be a custom context. This context can be used to inject dependencies like the HTTP request
/// or response or other server-only dependencies, but it does *not* have access to state that exists in the client.
///
/// The paths passed into this function are used in the generated code, so they must be in scope when the macro is called.
///
/// ```ignore /// ```ignore
/// #[proc_macro_attribute] /// #[proc_macro_attribute]
/// pub fn server(args: proc_macro::TokenStream, s: TokenStream) -> TokenStream { /// pub fn server(args: proc_macro::TokenStream, s: TokenStream) -> TokenStream {