Hello everyone,
I’m having problems handling big file uploads. I have the following code, which fails with an error bad file descriptor.
// Somewhere in the code...
const maxImageUploadSize = 1 << 10 << 14 // ~16 MB
r.ParseMultipartForm(maxImageUploadSize)
// Somewhere else...
file, header, err := r.FormFile(formName)
if err != nil {
logger.Error("Failed getting file from form", err)
return nil, nil, 0, nil // return blank filename, but no error
}
defer file.Close()
fileSize, err := file.Seek(0, 2)
if err != nil {
logger.Error("Failed getting file size from form", err)
return nil, nil, 0, err
}
_, err = file.Seek(0, 0) // return the pointer to the beginning
if err != nil {
logger.Error("Failed getting file size from form", err)
return nil, nil, 0, err
}
// Then I handle the file, by moving it to a proper location
if err := os.MkdirAll(filepath.Dir(filePath), 0777); err != nil {
logger.Error("Failed creating directory", err)
return err
}
out, err := os.Create(filePath)
if err != nil {
logger.Error("Failed creating destination file", err)
return err
}
defer out.Close()
if _, err := io.Copy(out, file); err != nil {
logger.Error("Failed saving file to directory", err)
return err
}
My code fails on io.Copy (the last couple of lines) with the error: Failed saving file to directory read /tmp/multipart-716526200: bad file descriptor. It does work with files of less than 1 GB, but with bigger images it’ll always fail with this message.
Any clues?