FSharp.Data.GraphQL/samples/magic-eight-ball/GraphiQL.fs at c23907ad7a69650a921af206882957512130641f · fsprojects/FSharp.Data.GraphQL

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module FSharp.Data.GraphQL.Samples.MagicEightBall.GraphiQL

open Suave

open Suave.Http

open Suave.Operators

// `GraphQL.Server.Ui.GraphiQL` (used by the other samples) only ships an ASP.NET Core middleware, so it can't be

// composed into a Suave `WebPart`. Its `GraphiQLPageModel.Render()` method produces static HTML for a fixed set of

// options (GraphQL endpoint `/`, subscriptions endpoint `/ws`, `graphql-ws` subscriptions), so that output is

// hardcoded here instead of invoking the internal renderer through reflection.

let private page =

"""<!--

* This source code is licensed under the license found in the

* LICENSE file in the root directory of this source tree.

-->

<!DOCTYPE html>

<html>

<head>

<style>

body {

height: 100%;

margin: 0;

width: 100%;

overflow: hidden;

}

#graphiql {

height: 100vh;

}

</style>

<!--

This GraphiQL example depends on Promise and fetch, which are available in

modern browsers, but can be "polyfilled" for older browsers.

GraphiQL itself depends on React DOM.

If you do not want to rely on a CDN, you can host these files locally or

include them directly in your favored resource bunder.

-->

<script

src="https://cdn.jsdelivr.net/npm/whatwg-fetch@2.0.3/fetch.min.js"

integrity="sha384-dcF7KoWRaRpjcNbVPUFgatYgAijf8DqW6NWuqLdfB5Sb4Cdbb8iHX7bHsl9YhpKa"

crossorigin="anonymous"

></script>

<script

src="https://unpkg.com/react@16.14.0/umd/react.production.min.js"

integrity="sha384-N7y5SSAooNlIfb9H750GR82ufkn1JXJFaCjg8pmt+OZuKcZoTvTGfog4d4taG/cF"

crossorigin="anonymous"

></script>

<script

src="https://unpkg.com/react-dom@16.14.0/umd/react-dom.production.min.js"

integrity="sha384-j7WmMv3OO6n8pZRATOsaMVEdZcHpoaTBIika/l92YM2AkEex72QunlTQlgmu+pI8"

crossorigin="anonymous"

></script>

<!--

These two files can be found in the npm module, however you may wish to

copy them directly into your environment, or perhaps include them in your

favored resource bundler.

-->

<link

rel="stylesheet"

href="https://unpkg.com/graphiql@3.2.0/graphiql.min.css"

integrity="sha384-yz3/sqpuplkA7msMo0FE4ekg0xdwdvZ8JX9MVZREsxipqjU4h8IRfmAMRcb1QpUy"

crossorigin="anonymous"

<script

src="https://unpkg.com/subscriptions-transport-ws@0.8.2/browser/client.js"

integrity="sha384-Eqe2SG8kA+Au+rwrgfWJ+epqYAtKGW/As+WdcywebVKX7377xelWa+/il4CHiHXI"

crossorigin="anonymous"

></script>

<script

src="https://unpkg.com/graphiql-subscriptions-fetcher@0.0.2/browser/client.js"

integrity="sha384-ArTEHLNWIe9TuoDpFEtD/NeztNdWn3SdmWwMiAuZaSJeOaYypEGzeQoBxuPO+ORM"

crossorigin="anonymous"

></script>

<script

src="https://unpkg.com/graphql-ws@5.16.0/umd/graphql-ws.min.js"

integrity="sha384-oEPbisbEBMo7iCrbQcKx244HXUjGnF1jyS8hkVZ3oCwnw9c9oLfY70c1RKeKj3+i"

crossorigin="anonymous"

></script>

</head>

<body>

<div id="graphiql">Loading...</div>

<script

src="https://unpkg.com/graphiql@3.2.0/graphiql.min.js"

type="application/javascript"

integrity="sha384-h7T8iQ4OYtRS2RIWfZ7ahqfNRtVrjc6Uz/gUJjydAV/uWn/HgC5GMnSKmsvNGeUH"

crossorigin="anonymous"

></script>

/**

* This GraphiQL example illustrates how to use some of GraphiQL's props

* in order to enable reading and updating the URL parameters, making

* link sharing of queries a little bit easier.

* This is only one example of this kind of feature, GraphiQL exposes

* various React params to enable interesting integrations.

// Parse the search string to get url parameters.

var search = window.location.search;

var parameters = {};

search.substr(1).split('&').forEach(function (entry) {

var eq = entry.indexOf('=');

if (eq >= 0) {

parameters[decodeURIComponent(entry.slice(0, eq))] =

decodeURIComponent(entry.slice(eq + 1));

}

});

// if variables was provided, try to format it.

if (parameters.variables) {

try {

parameters.variables =

JSON.stringify(JSON.parse(parameters.variables), null, 2);

} catch (e) {

// Do nothing, we want to display the invalid JSON as a string, rather

// than present an error.

}

// When the query and variables string is edited, update the URL bar so

// that it can be easily shared

function onEditQuery(newQuery) {

parameters.query = newQuery;

updateURL();

}

function onEditVariables(newVariables) {

parameters.variables = newVariables;

updateURL();

}

function onEditOperationName(newOperationName) {

parameters.operationName = newOperationName;

updateURL();

}

function updateURL() {

var newSearch = '?' + Object.keys(parameters).filter(function (key) {

return Boolean(parameters[key]);

}).map(function (key) {

return encodeURIComponent(key) + '=' +

encodeURIComponent(parameters[key]);

}).join('&');

history.replaceState(null, null, newSearch);

}

// Defines a GraphQL fetcher using the fetch API. You're not required to

// use fetch, and could instead implement graphQLFetcher however you like,

// as long as it returns a Promise or Observable.

function graphQLFetcher(graphQLParams, fetcherOpts = { headers: {} }) {

// This example expects a GraphQL server at the path /graphql.

// Change this to point wherever you host your GraphQL server.

return fetch('/', {

method: 'post',

headers: Object.assign({"Accept":"application/json","Content-Type":"application/json"}, fetcherOpts.headers),

body: JSON.stringify(graphQLParams),

credentials: 'same-origin',

}).then(function (response) {

return response.text();

}).then(function (responseBody) {

try {

return JSON.parse(responseBody);

} catch (error) {

return responseBody;

}

});

}

function getSubscriptionsEndPoint() {

let subscriptionsEndPoint = "/ws";

if (/^(?:[a-z]+:)?\/\//i.test(subscriptionsEndPoint)) {

// if location includes protocol (e.g. "wss://") then return exact string

return subscriptionsEndPoint;

} else if (subscriptionsEndPoint[0] != '/') {

// if location is relative (e.g. "api") then prepend host and current path

let currentUrl = /^[^?]*(?=\/)/.exec(window.location.pathname);

currentUrl = currentUrl ? currentUrl[0] : '';

while (subscriptionsEndPoint.substring(0, 3) == '../') {

subscriptionsEndPoint = subscriptionsEndPoint.substring(3);

currentUrl = /^[^?]*(?=\/)/.exec(currentUrl);

currentUrl = currentUrl ? currentUrl[0] : '';

}

return (window.location.protocol === "http:" ? "ws://" : "wss://") + window.location.host + currentUrl + '/' + subscriptionsEndPoint;

}

// if location is absolute (e.g. "/api") then prepend host only

return (window.location.protocol === "http:" ? "ws://" : "wss://") + window.location.host + subscriptionsEndPoint;

}

const subscriptionEndPoint = getSubscriptionsEndPoint();

// Enable Subscriptions via WebSocket

let subscriptionsClient = null;

function subscriptionsTransportWsFetcher(graphQLParams, fetcherOpts = { headers: {} }) {

if (!subscriptionsClient)

subscriptionsClient = new window.SubscriptionsTransportWs.SubscriptionClient(subscriptionEndPoint, { reconnect: true });

return window.GraphiQLSubscriptionsFetcher.graphQLFetcher(subscriptionsClient, function (_graphQLParams) {

return graphQLFetcher(_graphQLParams, fetcherOpts);

})(graphQLParams);

}

function isSubscription(operationName, documentAST) {

if (!documentAST.definitions || !documentAST.definitions.length || !documentAST.definitions.filter) return false;

let definitions = documentAST.definitions.filter(function (def) { return def.kind === 'OperationDefinition'; });

if (operationName) definitions = definitions.filter(function (def) { return def.name && def.name.value === operationName; });

if (definitions.length === 0) return false;

return definitions[0].operation === 'subscription';

}

let wsClient = null;

function graphQLWsFetcher(payload, fetcherOpts) {

if (!fetcherOpts || !fetcherOpts.documentAST || !isSubscription(payload.operationName, fetcherOpts.documentAST))

return graphQLFetcher(payload, fetcherOpts);

if (!wsClient) {

wsClient = graphqlWs.createClient({ url: subscriptionEndPoint });

}

let deferred = null;

const pending = [];

let throwMe = null,

done = false;

const dispose = wsClient.subscribe(payload, {

next: (data) => {

pending.push(data);

if (deferred) deferred.resolve(false);

error: (err) => {

if (err instanceof Error) {

throwMe = err;

} else if (err instanceof CloseEvent) {

throwMe = new Error(`Socket closed with event ${err.code} ${err.reason || ""}`.trim());

} else {

// GraphQLError[]

throwMe = new Error(err.map(({ message }) => message).join(", "));

}

if (deferred) deferred.reject(throwMe);

complete: () => {

done = true;

if (deferred) deferred.resolve(true);

});

return {

[Symbol.asyncIterator]: function() {

return this;

next: function() {

if (done) return Promise.resolve({ done: true, value: undefined });

if (throwMe) return Promise.reject(throwMe);

if (pending.length) return Promise.resolve({ value: pending.shift() });

return new Promise(function(resolve, reject) {

deferred = { resolve, reject };

}).then(function(result) {

if (result) {

return { done: true, value: undefined };

} else {

return { value: pending.shift() };

}

});

return: function() {

dispose();

return Promise.resolve({ done: true, value: undefined });

}

};

}

const subscriptionFetcher = (true) ? graphQLWsFetcher : subscriptionsTransportWsFetcher;

// Render <GraphiQL /> into the body.

// See the README in the top level of this module to learn more about

// how you can customize GraphiQL by providing different values or

// additional child elements.

ReactDOM.render(

React.createElement(GraphiQL, {

fetcher: subscriptionFetcher,

query: parameters.query,

variables: parameters.variables,

operationName: parameters.operationName,

onEditQuery: onEditQuery,

onEditVariables: onEditVariables,

onEditOperationName: onEditOperationName,

isHeadersEditorEnabled: true,

}),

document.getElementById('graphiql'),

);

</script>

</body>

</html>

"""

/// <summary>A <see cref="Suave.Http.WebPart"/> that serves the GraphiQL IDE at <c>/graphiql</c>, pointed at the GraphQL API served at <c>/</c>.</summary>

let webPart : WebPart =

Filters.path "/graphiql"

>=> Filters.GET

>=> Writers.setMimeType "text/html; charset=utf-8"

>=> Successful.OK page

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