Golang serve static files from memory

Question

I have a quick question about serving files in Go. There is the great timesaving FileServer handler, but for my use case, I only have 2 or 3 files (js and css) that go with

Answer 1

I would store the files in variable as plain text. Something like this:

package main

import (
        "fmt"
        "log"
        "net/http"
)

var files = map[string]string{}

func init() {
        files["style.css"] = `
/* css file content */
body { background-color: pink; }
`
}

func init() {
        files["index.html"] = `



Hello world!
`
}

func main() {
        for fileName, content := range files {
                contentCpy := content
                http.HandleFunc("/"+fileName, func(w http.ResponseWriter, r *http.Request) {
                        fmt.Fprintf(w, "%s\n", contentCpy)
                })
        }

        log.Fatal(http.ListenAndServe(":8080", nil))
}

That way, it is pretty easy to have your makefile or build script so something like:

for file in index.html style.css; do echo "package main\nfunc init() { files[\"$file\"] = \`$(cat $file)\` }" | gofmt -s > $file.go; done; go build && ./httptest