Fix LFS URL (#33840) (#33843)

Backport #33840 by wxiaoguang

Fix #33839

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/httplib/request.go

@@ -8,6 +8,7 @@ import (
 	"bytes"
 	"context"
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"io"
 	"net"
@@ -101,6 +102,9 @@ func (r *Request) Param(key, value string) *Request {
 
 // Body adds request raw body. It supports string, []byte and io.Reader as body.
 func (r *Request) Body(data any) *Request {
+	if r == nil {
+		return nil
+	}
 	switch t := data.(type) {
 	case nil: // do nothing
 	case string:
@@ -193,6 +197,9 @@ func (r *Request) getResponse() (*http.Response, error) {
 // Response executes request client gets response manually.
 // Caller MUST close the response body if no error occurs
 func (r *Request) Response() (*http.Response, error) {
+	if r == nil {
+		return nil, errors.New("invalid request")
+	}
 	return r.getResponse()
 }