How to convert base64 image to UploadedFile Laravel

Question

Vue Version : 2.6.10

Laravel Version : 6.0

I am using this vue upload package and everything is ok on client side (at least I think so). But on the server side, where I am using the laravel, have some problem.

Here is my vue send method:

        setImage: function (file) {
            let formData = new FormData();
            formData.append('file', file);
            axios.post(upload_route, formData , {
                headers: { 'Content-Type': 'multipart/form-data' }
            })
                .then(response => {
                    // upload successful
                })
                .catch(error => console.log(error));
        },

And this is my server side method:

    public function upload(Request $request){
        $path = $request->file('file')->store('avatars');
        return response('upload success' , 200);
    }

When I upload the file to the server, it gives me this error:

"message": "Call to a member function store() on null",

The file object I am sending in the setImage function is something like this (if I log it with console.log):

data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/2wBDAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQE...

Answer 1

I believe file parameter on setImage is not a File object. So the $request->file('file') is null, because you attach a string (base64), not a file.

You told us that output from console.log is base64 path, then you need to convert that (base64) to file.

Since you're using Laravel, here is the technique:

use Illuminate\Support\Str;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;
use Symfony\Component\HttpFoundation\File\File;

.....

$base64File = $request->input('file');

// decode the base64 file
$fileData = base64_decode(preg_replace('#^data:image/\w+;base64,#i', '', $base64File));

// save it to temporary dir first.
$tmpFilePath = sys_get_temp_dir() . '/' . Str::uuid()->toString();
file_put_contents($tmpFilePath, $fileData);

// this just to help us get file info.
$tmpFile = new File($tmpFilePath);

$file = new UploadedFile(
    $tmpFile->getPathname(),
    $tmpFile->getFilename(),
    $tmpFile->getMimeType(),
    0,
    true // Mark it as test, since the file isn't from real HTTP POST.
);

$file->store('avatars');

Update

Since you're using vue-image-upload-resize, I check the documentation that it has built in function to change the output from base64 to blob, so you can just:

<image-uploader
    ...
    output-format="blob"
    ... />