Support for redirected images

[marcalj]

Example, show Facebook profile images:

https://graph.facebook.com/1415773021975267/picture becomes: https://fbcdn-profile-a.akamaihd.net/hprofile-ak-ash1/276836_1415773021975267_370639944_q.jpg

I'm looking at this, but hopefully I will use a hack in my code... Anyone had the same issue?

[marcalj]

Why this jsFiddle is working with not same origin images? http://jsfiddle.net/xKJB8/3/

[niklasvh]

It isn't.

"Uncaught SecurityError: Failed to execute 'toDataURL' on 'HTMLCanvasElement': tainted canvases may not be exported."

[marcalj]

It works without errors at the first time, after opening the console and refresh full page doesn't work... strange.

[niklasvh]

If the image isn't in cache, it won't be drawn and as such the toDataURL just returns a blank canvas in base64. The image should be drawn only after it has been loaded

[marcalj]

I've solved the issue using file_get_contents. This is the important change (quick&dirty code)

        $image = file_get_contents($_GET['url']);

        if (false === $image) {
            $fp = false;
        } else {
            fwrite($sf, $image);

            $finfo = new finfo(FILEINFO_MIME);
            $mime = $finfo->buffer($image) . PHP_EOL;

            $mime = preg_split('/;+/', $mime, -1, PREG_SPLIT_NO_EMPTY);

            if (is_array($mime)) {
                $mime = trim($mime[0]);
            }

            $allowMimes = Array(
                'image/jpeg', 'image/jpg', 'image/png', 'image/gif',
                'text/html', 'application/xhtml', 'application/xhtml+xml'
            );

            if (!in_array($mime, $allowMimes)) {
                $err = $mime . ' mime is invalid';
                $mime = false;
            }

            $fp = true;
        }
        fclose($sf);

[marcalj]

Sorry, wrong repo!!!!! :dancer: :S