traefik/pkg/api/dashboard.go
2021-02-18 14:54:03 +01:00

59 lines
1.4 KiB
Go

package api
import (
"net/http"
"net/url"
assetfs "github.com/elazarl/go-bindata-assetfs"
"github.com/gorilla/mux"
"github.com/traefik/traefik/v2/pkg/log"
)
// DashboardHandler expose dashboard routes.
type DashboardHandler struct {
Assets *assetfs.AssetFS
}
// Append add dashboard routes on a router.
func (g DashboardHandler) Append(router *mux.Router) {
if g.Assets == nil {
log.WithoutContext().Error("No assets for dashboard")
return
}
// Expose dashboard
router.Methods(http.MethodGet).
Path("/").
HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
http.Redirect(resp, req, safePrefix(req)+"/dashboard/", http.StatusFound)
})
router.Methods(http.MethodGet).
PathPrefix("/dashboard/").
Handler(http.StripPrefix("/dashboard/", http.FileServer(g.Assets)))
}
func (g DashboardHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// allow iframes from our domains only
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/frame-src
w.Header().Set("Content-Security-Policy", "frame-src 'self' https://traefik.io https://*.traefik.io;")
http.FileServer(g.Assets).ServeHTTP(w, r)
}
func safePrefix(req *http.Request) string {
prefix := req.Header.Get("X-Forwarded-Prefix")
if prefix == "" {
return ""
}
parse, err := url.Parse(prefix)
if err != nil {
return ""
}
if parse.Host != "" {
return ""
}
return parse.Path
}