96 lines
1.8 KiB
Go
96 lines
1.8 KiB
Go
package main
|
|
|
|
import (
|
|
"io"
|
|
"log"
|
|
"net"
|
|
"net/http"
|
|
"strings"
|
|
|
|
"gfx.cafe/open/gun"
|
|
)
|
|
|
|
var Config struct {
|
|
Port string
|
|
Root string
|
|
}
|
|
|
|
func init() {
|
|
gun.Load(&Config)
|
|
if Config.Port == "" {
|
|
Config.Port = "8080"
|
|
}
|
|
if Config.Root == "" {
|
|
Config.Root = "./dist"
|
|
}
|
|
}
|
|
|
|
var hopHeaders = []string{
|
|
"Connection",
|
|
"Keep-Alive",
|
|
"Proxy-Authenticate",
|
|
"Proxy-Authorization",
|
|
"Te",
|
|
"Trailers",
|
|
"Transfer-Encoding",
|
|
"Upgrade",
|
|
}
|
|
|
|
func appendHostToXForwardHeader(header http.Header, host string) {
|
|
if prior, ok := header["X-Forwarded-For"]; ok {
|
|
host = strings.Join(prior, ", ") + ", " + host
|
|
}
|
|
header.Set("X-Forwarded-For", host)
|
|
}
|
|
|
|
func copyHeader(dst, src http.Header) {
|
|
for k, vv := range src {
|
|
for _, v := range vv {
|
|
dst.Add(k, v)
|
|
}
|
|
}
|
|
}
|
|
|
|
func delHopHeaders(header http.Header) {
|
|
for _, h := range hopHeaders {
|
|
header.Del(h)
|
|
}
|
|
}
|
|
|
|
type Handler struct {
|
|
c http.Client
|
|
}
|
|
|
|
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
|
if strings.HasPrefix(strings.TrimPrefix("/", r.URL.Path), "lifeto") {
|
|
h.handleProxy(w, r)
|
|
return
|
|
}
|
|
h.handleProxy(w, r)
|
|
}
|
|
func (h *Handler) handleProxy(w http.ResponseWriter, r *http.Request) {
|
|
r.RequestURI = ""
|
|
if clientIP, _, err := net.SplitHostPort(r.RemoteAddr); err == nil {
|
|
appendHostToXForwardHeader(r.Header, clientIP)
|
|
}
|
|
resp, err := h.c.Do(r)
|
|
if err != nil {
|
|
http.Error(w, "Server Error", http.StatusInternalServerError)
|
|
log.Println("ServeHTTP:", err)
|
|
}
|
|
defer resp.Body.Close()
|
|
delHopHeaders(resp.Header)
|
|
copyHeader(w.Header(), resp.Header)
|
|
w.WriteHeader(resp.StatusCode)
|
|
io.Copy(w, resp.Body)
|
|
}
|
|
|
|
func (h *Handler) handleSite(w http.ResponseWriter, r *http.Request) {
|
|
http.StripPrefix(Config.Root, http.FileServer(http.Dir(Config.Root))).ServeHTTP(w, r)
|
|
}
|
|
|
|
func main() {
|
|
log.Printf("starting with config: %+v", Config)
|
|
http.ListenAndServe(":"+Config.Port, &Handler{})
|
|
}
|