How to get file URL using Storage facade in laravel 5?

Edit: Solution for L5.2+

There's a better and more straightforward solution.

Use Storage::url($filename) to get the full path/URL of a given file. Note that you need to set S3 as your storage filesystem in config/filesystems.php: 'default' => 's3'

Of course, you can also do Storage::disk('s3')->url($filename) in the same way.

As you can see in config/filesystems.php there's also a parameter 'cloud' => 's3' defined, that refers to the Cloud filesystem. In case you want to mantain the storage folder in the local server but retrieve/store some files in the cloud use Storage::cloud(), which also has the same filesystem methods, i.e. Storage::cloud()->url($filename).

The Laravel documentation doesn't mention this method, but if you want to know more about it you can check its source code here.

Make sure to get() the subpages as IlluminateSupportCollection and mapWithKeys() to reformat the results. Use toArray() to provide the format Nova assumes:

private function selectOptions(): array
{
    $subpages = DB::table('subpages')->get();
    return $subpages->mapWithKeys(function ($subpage) {
        return [$subpage->slug => $subpage->slug];
    })->toArray();
}

This is how the returned result should look like:

[
    'my-article-1' => 'my-article-1',
    'my-article-2' => 'my-article-2',
    'my-article-3' => 'my-article-3',
]

The UploadedFile object is ultimately extended from SymfonyComponentHttpFoundationFileUploadedFile which get/sets the mimeType from The type of the file as provided by PHP.

To access that mimeType you would need to call $file->getClientMimeType()

However in the Symfony docblock for the function it suggests:

The client mime type is extracted from the request from which the file was uploaded, so it should not be considered as a safe value.

For a trusted mime type, use getMimeType() instead (which guesses the mime type based on the file content).

In your case however $file->getMimeType() which should be trusted and guesses the mime type from the contents, however it returns something as if it cannot determine the mime type, being "application/octet-stream"

Additional information

To help you decide. Basically getClientMimeType() would return the mime type that was set by the browser.

The getMimeType call guesses the mime type using two different techniques that I can see:

1. Using a binary mime type technique looking at the output of the following command file -b --mime %s 2>/dev/null if it is supported.

2. The second technique is using the finfo_open command if it does exist inside php.

If both 1. and 2. exists on your system, from what I see 2. will take preference, and 1. will be the fallback.

I personally would favour the results from getMimeType() for security. However, it would be another interesting question to ask "How reliable is browser mime type detection, and what techniques are used" :-)

Updated example

I include an example for you.

For me doing a check on a "DropboxInstalled.dmg", here are my results:

1. using file -b --mime DropboxInstaller.dmg from a commandline (terminal) returns application/octet-stream

2. using finfo_open functionality

$finfo = new finfo(FILEINFO_MIME_TYPE);
echo $finfo->file('./DropboxInstaller.dmg');

returns application/x-iso9660-image