73 lines
2 KiB
Go
73 lines
2 KiB
Go
package dashboard
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import (
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"io/fs"
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"net/http"
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"net/url"
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"github.com/gorilla/mux"
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"github.com/traefik/traefik/v2/webui"
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)
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// Handler expose dashboard routes.
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type Handler struct {
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assets fs.FS // optional assets, to override the webui.FS default
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}
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// Append adds dashboard routes on the given router, optionally using the given
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// assets (or webui.FS otherwise).
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func Append(router *mux.Router, customAssets fs.FS) {
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assets := customAssets
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if assets == nil {
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assets = webui.FS
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}
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// Expose dashboard
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router.Methods(http.MethodGet).
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Path("/").
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HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
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http.Redirect(resp, req, safePrefix(req)+"/dashboard/", http.StatusFound)
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})
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router.Methods(http.MethodGet).
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PathPrefix("/dashboard/").
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HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// allow iframes from our domains only
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// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/frame-src
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w.Header().Set("Content-Security-Policy", "frame-src 'self' https://traefik.io https://*.traefik.io;")
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// The content type must be guessed by the file server.
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// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options
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w.Header().Del("Content-Type")
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http.StripPrefix("/dashboard/", http.FileServer(http.FS(assets))).ServeHTTP(w, r)
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})
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}
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func (g Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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assets := g.assets
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if assets == nil {
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assets = webui.FS
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}
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// allow iframes from our domains only
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// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/frame-src
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w.Header().Set("Content-Security-Policy", "frame-src 'self' https://traefik.io https://*.traefik.io;")
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http.FileServer(http.FS(assets)).ServeHTTP(w, r)
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}
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func safePrefix(req *http.Request) string {
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prefix := req.Header.Get("X-Forwarded-Prefix")
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if prefix == "" {
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return ""
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}
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parse, err := url.Parse(prefix)
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if err != nil {
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return ""
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}
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if parse.Host != "" {
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return ""
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}
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return parse.Path
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}
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