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// @flow strict
type GraphiQLData = {|
query: ?string,
variables: ?{ +[name: string]: mixed, ... },
operationName: ?string,
result?: mixed,
options: GraphiQLOptions,
|};
export type GraphiQLOptions = {|
/**
* An optional GraphQL string to use when no query is provided and no stored
* query exists from a previous session. If undefined is provided, GraphiQL
* will use its own default query.
*/
defaultQuery?: ?string,
|};
// Ensures string values are safe to be used within a <script> tag.
function safeSerialize(data) {
return data ? JSON.stringify(data).replace(/\//g, '\\/') : 'undefined';
}
// Implemented as Babel transformation, see ../resources/load-staticly-from-npm.js
declare function loadFileStaticlyFromNPM(npmPath: string): string;
/**
* When express-graphql receives a request which does not Accept JSON, but does
* Accept HTML, it may present GraphiQL, the in-browser GraphQL explorer IDE.
*
* When shown, it will be pre-populated with the result of having executed the
* requested query.
*/
export function renderGraphiQL(data: GraphiQLData): string {
const queryString = data.query;
const variablesString = data.variables
? JSON.stringify(data.variables, null, 2)
: null;
const resultString = data.result
? JSON.stringify(data.result, null, 2)
: null;
const operationName = data.operationName;
const defaultQuery = data.options.defaultQuery;
return `<!--
The request to this GraphQL server provided the header "Accept: text/html"
and as a result has been presented GraphiQL - an in-browser IDE for
exploring GraphQL.
If you wish to receive JSON, provide the header "Accept: application/json" or
add "&raw" to the end of the URL within a browser.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>GraphiQL</title>
<meta name="robots" content="noindex" />
<meta name="referrer" content="origin" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style>
body {
margin: 0;
overflow: hidden;
}
#graphiql {
height: 100vh;
}
</style>
<style>
// graphiql/graphiql.css
${loadFileStaticlyFromNPM('graphiql/graphiql.css')}
</style>
<script>
// promise-polyfill/dist/polyfill.min.js
${loadFileStaticlyFromNPM('promise-polyfill/dist/polyfill.min.js')}
</script>
<script>
// unfetch/dist/unfetch.umd.js
${loadFileStaticlyFromNPM('unfetch/dist/unfetch.umd.js')}
</script>
<script>
// react/umd/react.production.min.js
${loadFileStaticlyFromNPM('react/umd/react.production.min.js')}
</script>
<script>
// react-dom/umd/react-dom.production.min.js
${loadFileStaticlyFromNPM('react-dom/umd/react-dom.production.min.js')}
</script>
<script>
// graphiql/graphiql.min.js
${loadFileStaticlyFromNPM('graphiql/graphiql.min.js')}
</script>
</head>
<body>
<div id="graphiql">Loading...</div>
<script>
// Collect the URL parameters
var parameters = {};
window.location.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));
}
});
// Produce a Location query string from a parameter object.
function locationQuery(params) {
return '?' + Object.keys(params).filter(function (key) {
return Boolean(params[key]);
}).map(function (key) {
return encodeURIComponent(key) + '=' +
encodeURIComponent(params[key]);
}).join('&');
}
// Derive a fetch URL from the current URL, sans the GraphQL parameters.
var graphqlParamNames = {
query: true,
variables: true,
operationName: true
};
var otherParams = {};
for (var k in parameters) {
if (parameters.hasOwnProperty(k) && graphqlParamNames[k] !== true) {
otherParams[k] = parameters[k];
}
}
var fetchURL = locationQuery(otherParams);
// Defines a GraphQL fetcher using the fetch API.
function graphQLFetcher(graphQLParams) {
return fetch(fetchURL, {
method: 'post',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify(graphQLParams),
credentials: 'include',
}).then(function (response) {
return response.json();
});
}
// 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() {
history.replaceState(null, null, locationQuery(parameters));
}
// Render <GraphiQL /> into the body.
ReactDOM.render(
React.createElement(GraphiQL, {
fetcher: graphQLFetcher,
onEditQuery: onEditQuery,
onEditVariables: onEditVariables,
onEditOperationName: onEditOperationName,
query: ${safeSerialize(queryString)},
response: ${safeSerialize(resultString)},
variables: ${safeSerialize(variablesString)},
operationName: ${safeSerialize(operationName)},
defaultQuery: ${safeSerialize(defaultQuery)},
}),
document.getElementById('graphiql')
);
</script>
</body>
</html>`;
}