Error displaying image. Any solution?

[zlukasmoura]

[bsweeney]

Have you allowed remote files (set isRemoteEnabled to true)? I know "localhost" is not a remote URL but as far as Dompdf is concerned anything accessed over HTTP is remote.

[Ajility97]

@bsweeney I'm using laravel-dompdf wrapper (dompdf 1.2.2) and having the same issue.

Offending line:
<img class="{{ $logo->class }}" src="{{ $logo->url }}" alt="logo"/>

Result:

config/dompdf.php:
'enable_remote' => true

$logo->url is a temporary URL to a JPG image in AWS S3. It looks something like this:
https://bucketname.s3.amazonaws.com/10/400px.jpg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIA3REDACTEDTHIS%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20220802T160626Z&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Signature=REDACTEDTHIS

It works fine in my local environment, but fails in our staging environment, don't see anything in the PHP log. I'm having trouble finding out why.

Things I've confirmed about the staging environment:

• The temporary directory is writeable by the webserver process.
• gd extension is enabled
• allow_url_fopen is true
• Environment uses a wildcard SSL certificate

[bsweeney]

Sounds like you've done the basics with regard to trouble-shooting. I don't have any additional thoughts off the top of my head. You might try enabling additional debugging (debug configuration in the wiki).

[Ajility97]

As a note to anyone who runs into this, my work-around was to base64 encode the image. No issues that way, and I default to a local image on error:

...
    private function getLogoTemporaryUrl(): string
    {
        return $this->logo?->getTemporaryUrl(now()->addMinutes(15)) ?? public_path('images/error-image.png');
    }

    public function getLogoBase64(): ?string
    {
        $mimeType = $this->logo?->mime_type ?? 'image/png';

        return 'data:' . $mimeType . ';base64, ' . base64_encode(
            file_get_contents($this->getLogoTemporaryUrl())
        );
    }
...

[bsweeney]

@Ajility97 yeah that is definitely one way around the issue. Sorry I didn't have any better advice on what was causing problems fetching the image.