This kept growing and I wanted to add some pictures, so I moved it to a blog post:
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A Go embed example of serving static files at the root URL path.
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package main | |
import ( | |
"embed" | |
"fmt" | |
"io/fs" | |
"log" | |
"net/http" | |
"os" | |
) | |
//go:embed public | |
var staticFiles embed.FS | |
func main() { | |
var staticFS = fs.FS(staticFiles) | |
htmlContent, err := fs.Sub(staticFS, "public") | |
if err != nil { | |
log.Fatal(err) | |
} | |
fs := http.FileServer(http.FS(htmlContent)) | |
// Serve static files | |
http.Handle("/", fs) | |
port := os.Getenv("PORT") | |
if port == "" { | |
port = "3000" | |
} | |
log.Printf("Listening on :%s...\n", port) | |
err = http.ListenAndServe(fmt.Sprintf(":%s", port), nil) | |
if err != nil { | |
log.Fatal(err) | |
} | |
} |
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<!doctype html> | |
<!-- public/index.html --> | |
<html lang="en"> | |
<head> | |
<meta charset="utf-8"> | |
<title>Go embed example</title> | |
<meta name="description" content="Go embed example"> | |
<meta name="author" content="bmcculley"> | |
<link rel="stylesheet" href="css/style.css"> | |
</head> | |
<body> | |
<p>A Go <a href="https://golang.org/pkg/embed/">embed</a> example of serving static files at the root URL path.</p> | |
</body> | |
</html> |
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package main | |
import ( | |
"embed" | |
"fmt" | |
"log" | |
"net/http" | |
"os" | |
"strings" | |
) | |
//go:embed public | |
var staticFiles embed.FS | |
var staticDir = "public" | |
func rootPath(h http.Handler) http.Handler { | |
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | |
// add header(s) | |
w.Header().Set("Cache-Control", "no-cache") | |
if r.URL.Path == "/" { | |
r.URL.Path = fmt.Sprintf("/%s/", staticDir) | |
} else { | |
b := strings.Split(r.URL.Path, "/")[0] | |
if b != staticDir { | |
r.URL.Path = fmt.Sprintf("/%s%s", staticDir, r.URL.Path) | |
} | |
} | |
h.ServeHTTP(w, r) | |
}) | |
} | |
func main() { | |
var staticFS = http.FS(staticFiles) | |
fs := rootPath(http.FileServer(staticFS)) | |
// Serve static files | |
http.Handle("/", fs) | |
port := os.Getenv("PORT") | |
if port == "" { | |
port = "3000" | |
} | |
log.Printf("Listening on :%s...\n", port) | |
err := http.ListenAndServe(fmt.Sprintf(":%s", port), nil) | |
if err != nil { | |
log.Fatal(err) | |
} | |
} |
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/* public/css/style.css */ | |
body { | |
margin: 20px; | |
font-family: sans-serif; | |
font-size: 1rem; | |
font-weight: 400; | |
line-height: 1.5; | |
color: #212529; | |
background-color: #fff; | |
-webkit-text-size-adjust: 100%; | |
-webkit-tap-highlight-color: rgba(0, 0, 0, 0); | |
} |
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