Method ServeHTTP

site/site.go:159–235

(rw http.ResponseWriter, r *http.Request)

}

func (h *Handler) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
	err := h.secureHeaders.Process(rw, r)
	if err != nil {
		return
	}

	// reqFile is the static file requested
	reqFile := filePath(r.URL.Path)
	state := htmlState{
		// Token is the CSRF token for the given request
		CSRF:      csrfState{Token: nosurf.Token(r)},
		BuildInfo: h.buildInfoJSON,
		DocsURL:   h.opts.DocsURL,
	}

	// First check if it's a file we have in our templates
	if h.serveHTML(rw, r, reqFile, state) {
		return
	}

	switch {
	// If requesting binaries, serve straight up.
	case reqFile == "bin" || strings.HasPrefix(reqFile, "bin/"):
		h.handler.ServeHTTP(rw, r)
		return
	// If requesting assets, serve straight up with caching.
	case reqFile == "assets" || strings.HasPrefix(reqFile, "assets/") || strings.HasPrefix(reqFile, "icon/"):
		// It could make sense to cache 404s, but the problem is that during an
		// upgrade a load balancer may route partially to the old server, and that
		// would make new asset paths get cached as 404s and not load even once the
		// new server was in place.  To combat that, only cache if we have the file.
		if h.exists(reqFile) && ShouldCacheFile(reqFile) {
			rw.Header().Add("Cache-Control", "public, max-age=31536000, immutable")
		}
		// If the asset does not exist, this will return a 404.
		h.handler.ServeHTTP(rw, r)
		return
	// If requesting the install.sh script, respond with the preprocessed version
	// which contains the correct hostname and version information.
	case reqFile == "install.sh":
		if h.installScript == nil {
			http.NotFound(rw, r)
			return
		}
		rw.Header().Add("Content-Type", "text/plain; charset=utf-8")
		http.ServeContent(rw, r, reqFile, time.Time{}, bytes.NewReader(h.installScript))
		return
	// If the original file path exists we serve it.
	case h.exists(reqFile):
		if ShouldCacheFile(reqFile) {
			rw.Header().Add("Cache-Control", "public, max-age=31536000, immutable")
		}
		h.handler.ServeHTTP(rw, r)
		return
	}

	// Serve the file assuming it's an html file
	// This matches paths like `/app/terminal.html`