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Pass Base64 jpeg image to og:image

I have image that is being generated in runtime on my website and I display it in html using 

<img src="data:image/jpeg;base64,<!-- base64 data -->" />

Now, I want for Facebook to fetch this image, but if I do the same for og:image meta tag, facebook debugger gives me an error. Any solution?

<meta property='og:image' content='data:image/jpeg;base64,<!-- base64 data -->'/>

Of course, I would like to avoid permanent saving of files since they are always different and it would get too crowded very quickly

Solution

  • Paste it to a PHP file that echos it out:

        <meta property='og:image' content='decoder.php?data=<!-- base64 data -->'/>

    decoder.php:

        <?php
        echo base64_decode($_GET['data']);
    ?>

    EDIT Make sure you check source for security reasons.