bad_meta_tags.html

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<html>

  <head>

    <meta charset="UTF-8" />

    <title>BadMetaTags</title>

    <meta property="twitter:image" content="http://test.com/twitter-image.jpg" />

    <meta property="og:image:url" content="ftp://test.com/og-image-url" />

    <meta property="og:image" content="file:///Users/invalid/img.jpg" />

    <meta property="twitter:description" />

    <meta property="og:description" content="" />

    <meta name="description" content="description" />

  </head>

  <body>

  </body>

</html>