Adds examples/graphql.rs

examples/graphql.rs

@@ -0,0 +1,76 @@
+#!/usr/bin/env run-cargo-script
+//! ```cargo
+//! [dependencies]
+//! juniper = "*"
+//! rouille = "*"
+//! serde_json = "*"
+//! serde = "*"
+//! ```
+
+#[macro_use] extern crate rouille;
+#[macro_use] extern crate juniper;
+extern crate serde_json;
+
+use std::io::prelude::*;
+use juniper::http::{GraphQLRequest};
+use juniper::{FieldResult, EmptyMutation};
+
+struct Query;
+
+graphql_object!(Query: Ctx |&self| {
+    field hello(&executor) -> FieldResult<String> {
+        // Use the special &executor argument to fetch the response string
+        Ok(executor.context().0.clone())
+    }
+});
+
+// Arbitrary context data.
+struct Ctx(String);
+
+// A root schema consists of a query and a mutation.
+// Request queries can be executed against a RootNode.
+type Schema = juniper::RootNode<'static, Query, EmptyMutation<Ctx>>;
+
+fn main() {
+    eprintln!("Open http://0.0.0.0:12000");
+    rouille::start_server("0.0.0.0:12000", move |request| {
+        router!(request,
+            (GET) (/) => {
+                // Builds a `Response` object that contains the "hello world" text.
+                rouille::Response::html(r#"
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
+<script src="https://cdn.rawgit.com/keithhackbarth/submitAsJSON/3b674774/submitAsJson.js"></script>
+<h1>hello world</h1>
+<form action="/graphql" method="post" onsubmit="event.preventDefault(); submitAsJSON(this);">
+<input type="text" name="query" value="query { hello }">
+<button type="submit">Submit</button>
+</form>
+"#)
+            },
+
+            (POST) (/graphql) => {
+                let mut data = request.data().unwrap();
+                let mut buf = Vec::new();
+                match data.read_to_end(&mut buf) {
+                    Ok(_) => {}
+                    Err(_) => return rouille::Response::text("Failed to read body"),
+                }
+
+                // Create a context object.
+                let ctx = Ctx("world!".to_string());
+
+                // Populate the GraphQL request object.
+                let req = serde_json::from_slice::<GraphQLRequest>(&mut buf).unwrap();
+
+                // Run the executor.
+                let res = req.execute(
+                    &Schema::new(Query, EmptyMutation::new()),
+                    &ctx,
+                );
+                rouille::Response::json(&res)
+            },
+
+            _ => rouille::Response::empty_404()
+        )
+    });
+}