43 lines
1.0 KiB
Go
43 lines
1.0 KiB
Go
package sockjs
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import (
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"crypto/md5"
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"fmt"
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"net/http"
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"text/template"
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)
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var tmpl = template.Must(template.New("iframe").Parse(iframeBody))
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func (h *handler) iframe(rw http.ResponseWriter, req *http.Request) {
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etagReq := req.Header.Get("If-None-Match")
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hash := md5.New()
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hash.Write([]byte(iframeBody))
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etag := fmt.Sprintf("%x", hash.Sum(nil))
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if etag == etagReq {
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rw.WriteHeader(http.StatusNotModified)
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return
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}
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rw.Header().Set("Content-Type", "text/html; charset=UTF-8")
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rw.Header().Add("ETag", etag)
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tmpl.Execute(rw, h.options.SockJSURL)
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}
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var iframeBody = `<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="X-UA-Compatible" content="IE=edge" />
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<script>
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document.domain = document.domain;
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_sockjs_onload = function(){SockJS.bootstrap_iframe();};
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</script>
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<script src="{{.}}"></script>
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</head>
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<body>
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<h2>Don't panic!</h2>
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<p>This is a SockJS hidden iframe. It's used for cross domain magic.</p>
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</body>
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</html>`
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