net/http: the server-side parse form returns inaccurate error #74955
Description
Go version
go1.24.6
Output of go env in your module/workspace:
GOVERSION="go1.24.6"What did you do?
Run the following code
package main
import (
"fmt"
"net/http"
"net/http/httptest"
)
func handler(w http.ResponseWriter, r *http.Request) {
fmt.Printf("r.Body: %#v\n", r.Body)
err := r.ParseMultipartForm(1024)
if err != nil {
fmt.Println("r.ParseMultipartForm error:", err)
w.WriteHeader(500)
}
}
func main() {
req := httptest.NewRequest(http.MethodPost, "http://localhost/upload", nil)
req.Header.Set("Content-Type", "multipart/form-data;boundary=-----TEST")
fmt.Printf("req.Body: %#v\n", req.Body)
w := httptest.NewRecorder()
handler(w, req)
resp := w.Result()
fmt.Println("response code:", resp.StatusCode)
}I created a http POST form request without body
What did you see happen?
req.Body: http.noBody{}
r.Body: http.noBody{}
r.ParseMultipartForm error: multipart: NextPart: EOF
response code: 500
What did you expect to see?
req.Body: http.noBody{}
r.Body: http.noBody{}
r.ParseMultipartForm error: missing form body
response code: 500