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client/web: precompress assets

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Precompress webclient assets with precompress util. This cuts our
css and js build sizes to about 1/3 of non-compressed size. Similar
compression done on tsconnect and adminhttp assets.

Updates #10261

Signed-off-by: Sonia Appasamy <sonia@tailscale.com>
This commit is contained in:
Sonia Appasamy
2023-12-07 14:02:08 -05:00
committed by Sonia Appasamy
parent 97f8577ad2
commit e5e5ebda44
3 changed files with 136 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
client/web/assets.go
View File

@@ -4,6 +4,7 @@
package web
import (
"io"
"io/fs"
"log"
"net/http"
@@ -13,10 +14,13 @@ import (
"os/exec"
"path/filepath"
"strings"
"time"
prebuilt "github.com/tailscale/web-client-prebuilt"
)
var start = time.Now()
func assetsHandler(devMode bool) (_ http.Handler, cleanup func()) {
if devMode {
// When in dev mode, proxy asset requests to the Vite dev server.
@@ -25,19 +29,46 @@ func assetsHandler(devMode bool) (_ http.Handler, cleanup func()) {
}
fsys := prebuilt.FS()
fileserver := http.FileServer(http.FS(fsys))
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
_, err := fs.Stat(fsys, strings.TrimPrefix(r.URL.Path, "/"))
if os.IsNotExist(err) {
// rewrite request to just fetch /index.html and let
path := strings.TrimPrefix(r.URL.Path, "/")
f, err := openPrecompressedFile(w, r, path, fsys)
if err != nil {
// Rewrite request to just fetch index.html and let
// the frontend router handle it.
r = r.Clone(r.Context())
r.URL.Path = "/"
path = "index.html"
f, err = openPrecompressedFile(w, r, path, fsys)
}
fileserver.ServeHTTP(w, r)
if f == nil {
http.Error(w, err.Error(), http.StatusNotFound)
return
}
defer f.Close()
// fs.File does not claim to implement Seeker, but in practice it does.
fSeeker, ok := f.(io.ReadSeeker)
if !ok {
http.Error(w, "Not seekable", http.StatusInternalServerError)
return
}
// Aggressively cache static assets, since we cache-bust our assets with
// hashed filenames.
w.Header().Set("Cache-Control", "public, max-age=31535996")
w.Header().Set("Vary", "Accept-Encoding")
http.ServeContent(w, r, path, start, fSeeker)
}), nil
}
func openPrecompressedFile(w http.ResponseWriter, r *http.Request, path string, fs fs.FS) (fs.File, error) {
if f, err := fs.Open(path + ".gz"); err == nil {
w.Header().Set("Content-Encoding", "gzip")
return f, nil
}
return fs.Open(path) // fallback
}
// startDevServer starts the JS dev server that does on-demand rebuilding
// and serving of web client JS and CSS resources.
func startDevServer() (cleanup func()) {

7
client/web/build/index.html
View File

@@ -6,10 +6,11 @@
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="shortcut icon" href="data:image/png;base64,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" />
<script type="module" crossorigin src="./assets/index-4d1f45ea.js"></script>
<link rel="stylesheet" href="./assets/index-8612dca6.css">
<link rel="preload" as="font" href="./assets/Inter.var.latin-39e72c07.woff2" type="font/woff2" crossorigin />
<script type="module" crossorigin src="./assets/index-fd4af382.js"></script>
<link rel="stylesheet" href="./assets/index-218918fa.css">
</head>
<body>
<body class="px-2">
<noscript>
<p class="mb-2">You need to enable Javascript to access the Tailscale web client.</p>
<p>If you need any help, feel free to <a href="mailto:support+webclient@tailscale.com" class="link">contact us</a>.</p>