How to replace existing file on a server

[Elijjahh]

Hi, there! Thank you for your time and effort you put in this library. I have a question about replacing existing files stored on a server.

I use your library to save users profile pictures. So I save them by user id. And I want to replace existing file with new one on PATCH request.

I have read this section but there is no function to check if there is an existing file with provided name. I thought that storeFileLocally will replace file if I provide same name but it just throws an error:

[nuxt] [request error] [unhandled] [500] EEXIST: file already exists, mkdir './files/profile'

my code:

const name = await storeFileLocally(body.image, `${event.context.user.id}`, '/profile');

Is there a way to check for existence of same name file? Or just replacing if there is one? Or maybe you will add this functionality soon?

[NyllRE]

Hey Elijjahh, I will look into fixing this issue, in the meantime you could use getFileLocally to check if the file exists, deleteFile to delete it if it exists and then storing a new file.

something similar to this (UNTESTED CODE):

// ! assuming the profile image is in a specific format like png
const fileExists = await getFileLocally(`${event.context.user.id}.png`, '/profile')

if (fileExists) {
  await deleteFile(`${event.context.user.id}.png`, '/profile')
}

const name = await storeFileLocally(
   body.image,
   event.context.user.id,
   '/profile'
)

Thank you for reporting this issue and I apologize for the inconvenience.

[Elijjahh]

Actually, I tried to delete file but error didn't go away. So I tried to google this error and after reading this article I tried to look at your code. Now it seems that you dont handle mkdir error for already existing folder.

I tried to wrap mkdir with try catch and now error is gone.

export const storeFileLocally = async (
  file: ServerFile,
  fileNameOrIdLength: string | number,
  filelocation: string = '',
) => {
  const { binaryString, ext } = parseDataUrl(file.content);
  const location = useRuntimeConfig().public.fileStorage.mount;
  const originalExt = file.name.toString().split('.').pop() || ext;
  const filename =
    typeof fileNameOrIdLength == 'number'
      ? `${generateRandomId(fileNameOrIdLength)}.${originalExt}`
      : `${fileNameOrIdLength}.${originalExt}`;

  // I changed this part
  try {
    await mkdir(join(location, filelocation), { recursive: true });
  } catch (error) {
    console.log(error);
  }


  await writeFile(join(location, filelocation, filename), binaryString, {
    flag: 'w',
  });
  return filename;
};