readme.md

• Serve the current directory
• Map some extra paths to /index.html
• Also proxy /css/* to a seperate webservice

Usage:

PORT=8080 PROXY_URL="http://localhost:5455/27850" go run main.go

main.go

package main

import (
	"io"
	"io/ioutil"
	"net/http"
	"os"
	"strings"
)

var allowedPaths = []string{
	"photo",
	"characteristics",
	"interests",
	"personality",
	"introduction",
	"verification",
}

func contains(needle string, haystack []string) bool {
	for i := 0; i < len(haystack); i++ {
		if haystack[i] == needle {
			return true
		}
	}
	return false
}

func serv(proxy string, port string) {

	http.HandleFunc("/", func(res http.ResponseWriter, req *http.Request) {
		path := req.URL.Path[1:]
		if contains(path, allowedPaths) {
			http.ServeFile(res, req, "index.html")
		} else {
			http.StripPrefix("/", http.FileServer(http.Dir(""))).ServeHTTP(res, req)
		}
	})

	http.HandleFunc("/css/", func(res http.ResponseWriter, req *http.Request) {
		path := req.URL.Path[1:]
		get, err := http.Get(proxy + strings.Replace(path, "css", "", 1))
		if err != nil {
			http.NotFound(res, req)
			return
		}
		defer get.Body.Close()
		content, _ := ioutil.ReadAll(get.Body)
		res.Header().Set("Content-Type", "text/css")
		io.WriteString(res, string(content))
	})

	http.ListenAndServe(":"+port, nil)

}

func main() {

	proxy := os.Getenv("PROXY_URL")
	if proxy == "" {
		panic("please specify PROXY_URL environment variable")
	}
	port := os.Getenv("PORT")
	if port == "" {
		port = "9000"
	}
	serv(proxy, port)

}