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playground: secure CDN resources with Subresource Integrity #568

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Mar 4, 2019
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18 changes: 12 additions & 6 deletions handler/playground.go
Original file line number Diff line number Diff line change
Expand Up @@ -11,9 +11,12 @@ var page = template.Must(template.New("graphiql").Parse(`<!DOCTYPE html>
<meta charset=utf-8/>
<meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
<link rel="shortcut icon" href="https://graphcool-playground.netlify.com/favicon.png">
<link rel="stylesheet" href="//cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/static/css/index.css"/>
<link rel="shortcut icon" href="//cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/favicon.png"/>
<script src="//cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/static/js/middleware.js"></script>
<link rel="stylesheet" href="//cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/static/css/index.css"
integrity="{{ .cssSRI }}" crossorigin="anonymous"/>
<link rel="shortcut icon" href="//cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/favicon.png"
integrity="{{ .faviconSRI }}" crossorigin="anonymous"/>
<script src="//cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/static/js/middleware.js"
integrity="{{ .jsSRI }}" crossorigin="anonymous"></script>
<title>{{.title}}</title>
</head>
<body>
Expand Down Expand Up @@ -43,9 +46,12 @@ var page = template.Must(template.New("graphiql").Parse(`<!DOCTYPE html>
func Playground(title string, endpoint string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
err := page.Execute(w, map[string]string{
"title": title,
"endpoint": endpoint,
"version": "1.7.8",
"title": title,
"endpoint": endpoint,
"version": "1.7.8",
"cssSRI": "sha256-cS9Vc2OBt9eUf4sykRWukeFYaInL29+myBmFDSa7F/U=",
"faviconSRI": "sha256-GhTyE+McTU79R4+pRO6ih+4TfsTOrpPwD8ReKFzb3PM=",
"jsSRI": "sha256-ucQsC5k+XYnUlQia6tMKdAOGBbfbDAquMa+oqIooB5A=",
})
if err != nil {
panic(err)
Expand Down