buckn/derive_http
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added the receive macro to auto impl serde deserialize/await

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This commit is contained in:
Nathan Buck
2025-07-10 16:50:22 -04:00
parent 92416c1726
commit 999433cacf
1 changed files with 20 additions and 4 deletions
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24
src/lib.rs
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@ -2,7 +2,7 @@ use proc_macro::TokenStream;
use quote::quote; use quote::quote;
use syn::{parse_macro_input, DeriveInput, Data, Fields, Lit}; use syn::{parse_macro_input, DeriveInput, Data, Fields, Lit};
#[proc_macro_derive(HttpGetRequest, attributes(http_get))] #[proc_macro_derive(HttpRequest, attributes(http_get))]
pub fn derive_http_get_request(input: TokenStream) -> TokenStream { pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput); let input = parse_macro_input!(input as DeriveInput);
let name = &input.ident; let name = &input.ident;
@ -29,7 +29,7 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
Data::Struct(data_struct) => { Data::Struct(data_struct) => {
let fields = match &data_struct.fields { let fields = match &data_struct.fields {
Fields::Named(named) => &named.named, Fields::Named(named) => &named.named,
_ => panic!("#[derive(HttpGetRequest)] only supports structs with named fields"), _ => panic!("#[derive(HttpRequest)] only supports structs with named fields"),
}; };
let mut query_param_code = Vec::new(); let mut query_param_code = Vec::new();
@ -95,7 +95,7 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
#name::#vname(inner) => inner.send(client.clone(), headers.clone(), api_key).await, #name::#vname(inner) => inner.send(client.clone(), headers.clone(), api_key).await,
}); });
} }
_ => panic!("#[derive(HttpGetRequest)] enum variants must have a single unnamed field"), _ => panic!("#[derive(HttpRequest)] enum variants must have a single unnamed field"),
} }
} }
@ -115,7 +115,23 @@ pub fn derive_http_get_request(input: TokenStream) -> TokenStream {
} }
} }
_ => panic!("#[derive(HttpGetRequest)] only supports structs and enums"), _ => panic!("#[derive(HttpRequest)] only supports structs and enums"),
};
TokenStream::from(expanded)
}
#[proc_macro_derive(HttpResponse)]
pub fn derive_http_response(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput);
let name = &input.ident;
let expanded = quote! {
impl #name {
pub async fn receive(resp: awc::ClientResponse) -> Result<Self, awc::error::JsonPayloadError> {
resp.json().await
}
}
}; };
TokenStream::from(expanded) TokenStream::from(expanded)