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package main
import (
"fmt"
"log"
"net/http"
"net/http/httputil"
"strings"
"time"
)
func NewProxy(from, to string) http.Handler {
return &httputil.ReverseProxy{
Director: func(r *http.Request) {
log.Printf("%v (from: %v to: %v)\n", r.URL, from, to)
r.URL.Scheme = "http"
r.Host = to
r.URL.Host = to
r.URL.Path = strings.TrimPrefix(r.URL.Path, strings.TrimSuffix(from, "/*"))
r.URL.RawPath = strings.TrimPrefix(r.URL.RawPath, strings.TrimSuffix(from, "/*"))
},
Transport: http.DefaultTransport,
FlushInterval: -1,
ErrorLog: nil,
ModifyResponse: func(r *http.Response) error {
r.Header.Add("Via", fmt.Sprintf("%v gateway", r.Proto))
return nil
},
ErrorHandler: func(w http.ResponseWriter, r *http.Request, err error) {
log.Println(err)
},
}
}
func main() {
mux := http.NewServeMux()
mux.Handle("/idp/", NewProxy("/idp", "localhost:8282"))
mux.Handle("/sp/", NewProxy("/sp", "localhost:8283"))
log.Fatal((&http.Server{
Addr: ":8080",
Handler: mux,
ReadHeaderTimeout: 10 * time.Second,
ReadTimeout: 30 * time.Second,
WriteTimeout: 2 * time.Minute,
IdleTimeout: 5 * time.Minute,
ErrorLog: log.Default(),
}).ListenAndServe())
}
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