How do you serve a static html file using a go web server?

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That task is very easy with Golang net/http package.

All You need to do is:

package main

import (
        "net/http"
)

func main() {
        http.Handle("/", http.FileServer(http.Dir("./static")))
        http.ListenAndServe(":3000", nil)
}

assuming that static files are in folder named static in the root directory of the project.

If it’s in folder static, you’ll have index.html file calling http://localhost:3000/ which will result in rendering that index file instead of listing all the files availible.

Additionally, calling any other file in that folder (for example http://localhost:3000/clients.html) will show that file, properly rendered by the browser (at least Chrome, Firefox and Safari :))

UPDATE: serving files from url different than “/”

If You want to serve files, say from folder ./public under url: localhost:3000/static You have to use additional function: func StripPrefix(prefix string, h Handler) Handler like this:

package main

import (
        "net/http"
)

func main() {
        http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("./public"))))
        http.ListenAndServe(":3000", nil)
}

Thanks to that, all your files from ./public are avalible under localhost:3000/static

Without http.StripPrefix function, if you would try to access file localhost:3000/static/test.html, the server would look for it in ./public/static/test.html

This is because the server treats the whole URI as a relative path to the file.

Fortunately, it’s easily solved with the built-in function.

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