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@ -62,9 +62,10 @@ else if ($_GET['_thumb']) {
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$thumbnail_size = $RCMAIL->config->get('image_thumbnail_size', 240);
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$temp_dir = $RCMAIL->config->get('temp_dir');
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list(,$ext) = explode('/', $part->mimetype);
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$cache_basename = $temp_dir . '/' . md5($MESSAGE->headers->messageID . $part->mime_id . ':' . $RCMAIL->user->ID . ':' . $thumbnail_size);
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$cache_file = $cache_basename . '.' . $ext;
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$mimetype = $part->mimetype;
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$file_ident = $MESSAGE->headers->messageID . ':' . $part->mime_id . ':' . $part->size . ':' . $part->mimetype;
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$cache_basename = $temp_dir . '/' . md5($file_ident . ':' . $RCMAIL->user->ID . ':' . $thumbnail_size);
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$cache_file = $cache_basename . '.' . $ext;
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// render thumbnail image if not done yet
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if (!is_file($cache_file)) {
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