mirror of https://github.com/portainer/portainer
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package file
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import (
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"net/http"
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"strings"
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"github.com/portainer/portainer/api/http/security"
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"github.com/portainer/portainer/pkg/featureflags"
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"github.com/gorilla/handlers"
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)
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// Handler represents an HTTP API handler for managing static files.
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type Handler struct {
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http.Handler
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wasInstanceDisabled func() bool
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}
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// NewHandler creates a handler to serve static files.
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func NewHandler(assetPublicPath string, wasInstanceDisabled func() bool) *Handler {
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h := &Handler{
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Handler: security.MWSecureHeaders(
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handlers.CompressHandler(http.FileServer(http.Dir(assetPublicPath))),
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featureflags.IsEnabled("hsts"),
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featureflags.IsEnabled("csp"),
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),
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wasInstanceDisabled: wasInstanceDisabled,
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}
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return h
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}
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func isHTML(acceptContent []string) bool {
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for _, accept := range acceptContent {
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if strings.Contains(accept, "text/html") {
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return true
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}
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}
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return false
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}
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func (handler *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if handler.wasInstanceDisabled() {
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if r.RequestURI == "/" || r.RequestURI == "/index.html" {
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http.Redirect(w, r, "/timeout.html", http.StatusTemporaryRedirect)
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return
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}
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} else {
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if strings.HasPrefix(r.RequestURI, "/timeout.html") {
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http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
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return
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}
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}
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if !isHTML(r.Header["Accept"]) {
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w.Header().Set("Cache-Control", "max-age=31536000")
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} else {
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w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
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}
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handler.Handler.ServeHTTP(w, r)
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}
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