121 lines
3.2 KiB
Go
121 lines
3.2 KiB
Go
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package graphiql
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import (
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"html/template"
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"net/http"
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"net/url"
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)
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var page = template.Must(template.New("graphiql").Parse(`<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>{{.title}}</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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<script
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src="https://cdn.jsdelivr.net/npm/react@{{.reactVersion}}/umd/react.production.min.js"
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integrity="{{.reactSRI}}"
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crossorigin="anonymous"
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></script>
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<script
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src="https://cdn.jsdelivr.net/npm/react-dom@{{.reactVersion}}/umd/react-dom.production.min.js"
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integrity="{{.reactDOMSRI}}"
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crossorigin="anonymous"
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></script>
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<link
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rel="stylesheet"
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href="https://cdn.jsdelivr.net/npm/graphiql@{{.version}}/graphiql.min.css"
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x-integrity="{{.cssSRI}}"
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crossorigin="anonymous"
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/>
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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://cdn.jsdelivr.net/npm/graphiql@{{.version}}/graphiql.min.js"
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x-integrity="{{.jsSRI}}"
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crossorigin="anonymous"
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></script>
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<script>
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{{- if .endpointIsAbsolute}}
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const url = {{.endpoint}};
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const subscriptionUrl = {{.subscriptionEndpoint}};
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{{- else}}
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const url = location.protocol + '//' + location.host + {{.endpoint}};
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const wsProto = location.protocol == 'https:' ? 'wss:' : 'ws:';
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const subscriptionUrl = wsProto + '//' + location.host + {{.endpoint}};
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{{- end}}
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const fetcher = GraphiQL.createFetcher({ url, subscriptionUrl });
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ReactDOM.render(
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React.createElement(GraphiQL, {
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fetcher: fetcher,
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isHeadersEditorEnabled: true,
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shouldPersistHeaders: true
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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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// Handler responsible for setting up the playground
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func Handler(title string, endpoint string) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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w.Header().Add("Content-Type", "text/html; charset=UTF-8")
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err := page.Execute(w, map[string]interface{}{
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"title": title,
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"endpoint": endpoint,
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"endpointIsAbsolute": endpointHasScheme(endpoint),
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"subscriptionEndpoint": getSubscriptionEndpoint(endpoint),
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"version": "2.4.1",
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"reactVersion": "17.0.2",
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"cssSRI": "sha256-bGeEsMhcAqeXBjh2w0eQzBTFAxwlxhM0PKIKqMshlnk=",
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"jsSRI": "sha256-s+f7CFAPSUIygFnRC2nfoiEKd3liCUy+snSdYFAoLUc=",
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"reactSRI": "sha256-Ipu/TQ50iCCVZBUsZyNJfxrDk0E2yhaEIz0vqI+kFG8=",
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"reactDOMSRI": "sha256-nbMykgB6tsOFJ7OdVmPpdqMFVk4ZsqWocT6issAPUF0=",
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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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// endpointHasScheme checks if the endpoint has a scheme.
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func endpointHasScheme(endpoint string) bool {
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u, err := url.Parse(endpoint)
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return err == nil && u.Scheme != ""
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}
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// getSubscriptionEndpoint returns the subscription endpoint for the given
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// endpoint if it is parsable as a URL, or an empty string.
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func getSubscriptionEndpoint(endpoint string) string {
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u, err := url.Parse(endpoint)
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if err != nil {
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return ""
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}
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switch u.Scheme {
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case "https":
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u.Scheme = "wss"
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default:
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u.Scheme = "ws"
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}
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return u.String()
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}
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