f19d498254
- revive `warp_async` example (#659) Co-authored-by: Allan Calix <contact@allancalix.com> Co-authored-by: Kai Ren <tyranron@gmail.com>
104 lines
2.3 KiB
Rust
104 lines
2.3 KiB
Rust
//! This example demonstrates async/await usage with warp.
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use juniper::{
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graphql_object, EmptyMutation, EmptySubscription, FieldError, GraphQLEnum, RootNode,
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};
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use warp::{http::Response, Filter};
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#[derive(Clone, Copy, Debug)]
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struct Context;
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impl juniper::Context for Context {}
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#[derive(Clone, Copy, Debug, GraphQLEnum)]
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enum UserKind {
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Admin,
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User,
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Guest,
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}
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#[derive(Clone, Debug)]
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struct User {
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id: i32,
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kind: UserKind,
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name: String,
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}
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#[graphql_object(Context = Context)]
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impl User {
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fn id(&self) -> i32 {
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self.id
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}
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fn kind(&self) -> UserKind {
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self.kind
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}
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fn name(&self) -> &str {
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&self.name
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}
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async fn friends(&self) -> Vec<User> {
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vec![]
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}
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}
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#[derive(Clone, Copy, Debug)]
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struct Query;
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#[graphql_object(Context = Context)]
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impl Query {
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async fn users() -> Vec<User> {
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vec![User {
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id: 1,
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kind: UserKind::Admin,
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name: "user1".into(),
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}]
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}
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/// Fetch a URL and return the response body text.
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async fn request(url: String) -> Result<String, FieldError> {
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Ok(reqwest::get(&url).await?.text().await?)
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}
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}
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type Schema = RootNode<'static, Query, EmptyMutation<Context>, EmptySubscription<Context>>;
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fn schema() -> Schema {
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Schema::new(
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Query,
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EmptyMutation::<Context>::new(),
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EmptySubscription::<Context>::new(),
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)
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}
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#[tokio::main]
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async fn main() {
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std::env::set_var("RUST_LOG", "warp_async");
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env_logger::init();
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let log = warp::log("warp_server");
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let homepage = warp::path::end().map(|| {
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Response::builder()
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.header("content-type", "text/html")
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.body(format!(
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"<html><h1>juniper_warp</h1><div>visit <a href=\"/graphiql\">/graphiql</a></html>"
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))
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});
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log::info!("Listening on 127.0.0.1:8080");
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let state = warp::any().map(|| Context);
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let graphql_filter = juniper_warp::make_graphql_filter(schema(), state.boxed());
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warp::serve(
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warp::get()
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.and(warp::path("graphiql"))
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.and(juniper_warp::graphiql_filter("/graphql", None))
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.or(homepage)
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.or(warp::path("graphql").and(graphql_filter))
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.with(log),
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)
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.run(([127, 0, 0, 1], 8080))
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.await
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}
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