gr

main.go

@@ -7,11 +7,12 @@ import (
 	"io"
 	"log"
 	"net/http"
-	"net/http/httputil"
 	"net/url"
 	"os"
 	"strconv"
+	"strings"
 	"text/template"
+	"time"
 )
 
 func main() {
@@ -32,7 +33,13 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-	proxy := httputil.NewSingleHostReverseProxy(u)
+
+	c := &http.Client{
+		Timeout: time.Minute,
+		Transport: &http.Transport{
+			DisableKeepAlives: true,
+		},
+	}
 
 	handle := func(w http.ResponseWriter, r *http.Request) error {
 		var v interface{}
@@ -43,9 +50,36 @@ func main() {
 		if err := tmpl.Execute(buff, v); err != nil {
 			return err
 		}
-		r.Body = io.NopCloser(buff)
-		r.ContentLength = int64(len(buff.Bytes()))
-		proxy.ServeHTTP(w, r)
+
+		log.Printf("%+v => %s => %s", v, buff.Bytes(), u.String())
+
+		req, err := http.NewRequest(r.Method, u.String(), io.NopCloser(buff))
+		if err != nil {
+			return err
+		}
+		req = req.WithContext(r.Context())
+		for k, v := range r.Header {
+			switch strings.ToLower(k) {
+			case "content-length":
+			default:
+				req.Header.Set(k, v)
+			}
+		}
+		resp, err := c.Do(req)
+		if err != nil {
+			return err
+		}
+		defer resp.Body.Close()
+
+		for k, v := range resp.Header {
+			w.Header().Set(k, v[0])
+			for _, v := range v[1:] {
+				w.Header().Add(k, v)
+			}
+		}
+		w.WriteHeader(resp.StatusCode)
+		io.Copy(w, resp.Body)
+
 		return nil
 	}
 	log.Println("listening on", *p)