GraphQL server with Deno

import {
    graphql,
    buildSchema,
} from "https://cdn.pika.dev/graphql/^15.0.0";
import {Application, Router} from "https://deno.land/x/oak/mod.ts";

var schema = buildSchema(`
  type Query {
    hello: String
  }
`);

var resolver = {hello: () => 'Hello world!'}

const executeSchema = async (query:any) => {
    const result = await graphql(schema, query, resolver);   
    return result;
}

var router = new Router();

router.post("/graph", async ({request, response}) => {
    if(request.hasBody) {
        const body = await request.body();
        const result = await executeSchema(body.value);
        response.body = result;
    } else {
        response.body = "Query Unknown";
    }
})


let app = new Application();
app.use(router.routes());
app.use(router.allowedMethods());
console.log("Server running");
app.listen({port: 5000})

You can now use https://deno.land/x/deno_graphql to achieve this goal.

It provides everything needed out-of-the-box and works with multiple Deno frameworks (oak, abc, attain, etc).

This is how you code looks like (with oak for example):

import { Application, Context, Router } from "https://deno.land/x/oak/mod.ts";
import {
  gql,
  graphqlHttp,
  makeExecutableSchema,
} from "https://deno.land/x/deno_graphql/oak.ts";

const typeDefs = gql`
  type Query {
    hello: String
  }
`;

const resolvers = {
  Query: {
    hello: () => "Hello world!",
  },
};

const context = (context: Context) => ({
  request: context.request,
});

const schema = makeExecutableSchema({ typeDefs, resolvers });

const app = new Application();
const router = new Router();

router.post("/graphql", graphqlHttp({ schema, context }));

app.use(router.routes());

await app.listen({ port: 4000 });

PS : i'm the author of the package, so you can ask me anything.

Hope this helps!