login-validator: now it's not a simple GET, use custom json form

pkg/login-validator/cmd/auth_fwd.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"bytes"
+	"encoding/json"
 	"net/http"
 	"net/url"
 )
@@ -9,18 +11,23 @@ type FWDAuth struct {
 	URI *url.URL
 }
 
+type loginForm struct {
+	Username string
+	Password string
+}
+
 func (f FWDAuth) checkAuth(username, password string) (res bool, err error) {
-	if r, err := http.NewRequest("GET", f.URI.String(), nil); err != nil {
+	lf := loginForm{username, password}
+	j, err := json.Marshal(lf)
+	if err != nil {
+		return false, err
+	} else if r, err := http.NewRequest("POST", f.URI.String(), bytes.NewReader(j)); err != nil {
+		return false, err
+	} else if resp, err := http.DefaultClient.Do(r); err != nil {
 		return false, err
 	} else {
-		r.SetBasicAuth(username, password)
+		resp.Body.Close()
 
-		if resp, err := http.DefaultClient.Do(r); err != nil {
+		return resp.StatusCode < 400, err
-			return false, err
-		} else {
-			resp.Body.Close()
-
-			return resp.StatusCode < 400, err
-		}
 	}
 }