1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

//! Async-graphql integration with Tide

#![warn(missing_docs)]
#![allow(clippy::type_complexity)]
#![allow(clippy::needless_doctest_main)]

use async_graphql::http::GQLResponse;
use async_graphql::{
    IntoQueryBuilder, IntoQueryBuilderOpts, ObjectType, ParseRequestError, QueryBuilder,
    QueryResponse, Schema, SubscriptionType,
};
use async_trait::async_trait;
use tide::{http::headers, Request, Response, Status, StatusCode};

/// GraphQL request handler
///
///
/// # Examples
/// *[Full Example](<https://github.com/async-graphql/examples/blob/master/tide/starwars/src/main.rs>)*
///
/// ```no_run
/// use async_graphql::*;
/// use async_std::task;
/// use tide::Request;
///
/// struct QueryRoot;
/// #[Object]
/// impl QueryRoot {
///     #[field(desc = "Returns the sum of a and b")]
///     async fn add(&self, a: i32, b: i32) -> i32 {
///         a + b
///     }
/// }
///
/// fn main() -> std::result::Result<(), Box<dyn std::error::Error + Send + Sync>> {
///     task::block_on(async {
///         let mut app = tide::new();
///         app.at("/").post(|req: Request<()>| async move {
///             let schema = Schema::build(QueryRoot, EmptyMutation, EmptySubscription).finish();
///             async_graphql_tide::graphql(req, schema, |query_builder| query_builder).await
///         });
///         app.listen("0.0.0.0:8000").await?;
///
///         Ok(())
///     })
/// }
/// ```
pub async fn graphql<Query, Mutation, Subscription, TideState, F>(
    req: Request<TideState>,
    schema: Schema<Query, Mutation, Subscription>,
    query_builder_configuration: F,
) -> tide::Result<Response>
where
    Query: ObjectType + Send + Sync + 'static,
    Mutation: ObjectType + Send + Sync + 'static,
    Subscription: SubscriptionType + Send + Sync + 'static,
    TideState: Send + Sync + 'static,
    F: Fn(QueryBuilder) -> QueryBuilder + Send,
{
    let query_builder = req.body_graphql().await.status(StatusCode::BadRequest)?;
    let resp = GQLResponse(
        query_builder_configuration(query_builder)
            .execute(&schema)
            .await,
    );
    Ok(Response::new(StatusCode::Ok).body_json(&resp)?)
}

/// Similar to graphql, but you can set the options `IntoQueryBuilderOpts`.
pub async fn graphql_opts<Query, Mutation, Subscription, TideState, F>(
    req: Request<TideState>,
    schema: Schema<Query, Mutation, Subscription>,
    query_builder_configuration: F,
    opts: IntoQueryBuilderOpts,
) -> tide::Result<Response>
where
    Query: ObjectType + Send + Sync + 'static,
    Mutation: ObjectType + Send + Sync + 'static,
    Subscription: SubscriptionType + Send + Sync + 'static,
    TideState: Send + Sync + 'static,
    F: Fn(QueryBuilder) -> QueryBuilder + Send,
{
    let query_builder = req
        .body_graphql_opts(opts)
        .await
        .status(StatusCode::BadRequest)?;
    let resp = GQLResponse(
        query_builder_configuration(query_builder)
            .execute(&schema)
            .await,
    );
    Ok(Response::new(StatusCode::Ok).body_json(&resp)?)
}

/// Tide request extension
///
#[async_trait]
pub trait RequestExt<State: Send + Sync + 'static>: Sized {
    /// Convert a query to `async_graphql::QueryBuilder`.
    async fn body_graphql(self) -> Result<QueryBuilder, ParseRequestError> {
        self.body_graphql_opts(Default::default()).await
    }

    /// Similar to graphql, but you can set the options `IntoQueryBuilderOpts`.
    async fn body_graphql_opts(
        self,
        opts: IntoQueryBuilderOpts,
    ) -> Result<QueryBuilder, ParseRequestError>;
}

#[async_trait]
impl<State: Send + Sync + 'static> RequestExt<State> for Request<State> {
    async fn body_graphql_opts(
        self,
        opts: IntoQueryBuilderOpts,
    ) -> Result<QueryBuilder, ParseRequestError> {
        let content_type = self
            .header(&headers::CONTENT_TYPE)
            .and_then(|values| values.first().map(|value| value.to_string()));
        (content_type, self).into_query_builder_opts(&opts).await
    }
}

/// Tide response extension
///
pub trait ResponseExt<State: Send + Sync + 'static>: Sized {
    /// Set Body as the result of a GraphQL query.
    fn body_graphql(self, res: async_graphql::Result<QueryResponse>) -> serde_json::Result<Self>;
}

impl<State: Send + Sync + 'static> ResponseExt<State> for Response {
    fn body_graphql(self, res: async_graphql::Result<QueryResponse>) -> serde_json::Result<Self> {
        self.body_json(&GQLResponse(res))
    }
}