166 lines
4.9 KiB
Go
166 lines
4.9 KiB
Go
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package gql
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import (
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"html/template"
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"net/http"
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)
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// GraphiQL is an in-browser IDE for exploring GraphiQL APIs.
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// This handler returns GraphiQL when requested.
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//
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// For more information, see https://github.com/graphql/graphiql.
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func PlaygroundHandler(apiURL string) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if r.Method != "GET" {
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http.Error(w, "only GET requests are supported", http.StatusMethodNotAllowed)
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return
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}
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w.Header().Set("Content-Type", "text/html")
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err := page.Execute(w, map[string]interface{}{
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"apiURL": apiURL,
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})
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if err != nil {
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panic(err)
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}
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}
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}
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// https://github.com/graphql/graphiql/blob/main/examples/graphiql-cdn/index.html
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var page = template.Must(template.New("graphiql").Parse(`
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>GraphiQL</title>
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<style>
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body {
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height: 100%;
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margin: 0;
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width: 100%;
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overflow: hidden;
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}
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#graphiql {
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height: 100vh;
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}
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</style>
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<!--
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This GraphiQL example depends on Promise and fetch, which are available in
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modern browsers, but can be "polyfilled" for older browsers.
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GraphiQL itself depends on React DOM.
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If you do not want to rely on a CDN, you can host these files locally or
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include them directly in your favored resource bundler.
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-->
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<script
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src="https://unpkg.com/react@17/umd/react.development.js"
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integrity="sha512-Vf2xGDzpqUOEIKO+X2rgTLWPY+65++WPwCHkX2nFMu9IcstumPsf/uKKRd5prX3wOu8Q0GBylRpsDB26R6ExOg=="
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crossorigin="anonymous"
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></script>
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<script
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src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"
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integrity="sha512-Wr9OKCTtq1anK0hq5bY3X/AvDI5EflDSAh0mE9gma+4hl+kXdTJPKZ3TwLMBcrgUeoY0s3dq9JjhCQc7vddtFg=="
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crossorigin="anonymous"
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></script>
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<!--
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These two files can be found in the npm module, however you may wish to
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copy them directly into your environment, or perhaps include them in your
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favored resource bundler.
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-->
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<link rel="stylesheet" href="https://unpkg.com/graphiql/graphiql.min.css" />
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</head>
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<body>
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<div id="graphiql">Loading...</div>
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<script
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src="https://unpkg.com/graphiql/graphiql.min.js"
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type="application/javascript"
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></script>
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<script>
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// https://github.com/graphql/graphiql/blob/main/packages/graphiql/resources/renderExample.js
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// Parse the search string to get url parameters.
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var search = window.location.search;
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var parameters = {};
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search
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.substr(1)
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.split('&')
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.forEach(function (entry) {
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var eq = entry.indexOf('=');
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if (eq >= 0) {
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parameters[decodeURIComponent(entry.slice(0, eq))] = decodeURIComponent(
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entry.slice(eq + 1),
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);
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}
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});
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// When the query and variables string is edited, update the URL bar so
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// that it can be easily shared.
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function onEditQuery(newQuery) {
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parameters.query = newQuery;
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updateURL();
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}
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function onEditVariables(newVariables) {
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parameters.variables = newVariables;
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updateURL();
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}
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function onEditHeaders(newHeaders) {
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parameters.headers = newHeaders;
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updateURL();
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}
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function onTabChange(tabsState) {
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const activeTab = tabsState.tabs[tabsState.activeTabIndex];
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parameters.query = activeTab.query;
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parameters.variables = activeTab.variables;
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parameters.headers = activeTab.headers;
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updateURL();
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}
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function updateURL() {
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var newSearch =
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'?' +
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Object.keys(parameters)
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.filter(function (key) {
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return Boolean(parameters[key]);
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})
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.map(function (key) {
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return (
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encodeURIComponent(key) + '=' + encodeURIComponent(parameters[key])
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);
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})
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.join('&');
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history.replaceState(null, null, newSearch);
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}
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// Render <GraphiQL /> into the body.
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// See the README in the top level of this module to learn more about
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// how you can customize GraphiQL by providing different values or
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// additional child elements.
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ReactDOM.render(
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React.createElement(GraphiQL, {
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fetcher: GraphiQL.createFetcher({
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url: {{.apiURL}}
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}),
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query: parameters.query,
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variables: parameters.variables,
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headers: parameters.headers,
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defaultHeaders: parameters.defaultHeaders,
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onEditQuery: onEditQuery,
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onEditVariables: onEditVariables,
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onEditHeaders: onEditHeaders,
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defaultEditorToolsVisibility: true,
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isHeadersEditorEnabled: true,
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shouldPersistHeaders: true,
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onTabChange,
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}),
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document.getElementById('graphiql'),
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);
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</script>
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</body>
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</html>
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`))
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