已加密的编码
checkCode = "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"
加上前缀：
data:image/gif;base64,
生成的图片：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8">
</head>
<body>
<title></title>
<script type="text/javascript">
</script>
<img src="data:image/gif;base64,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" alt="图片Base64编码" style="max-90%; max-height:2000px;">
</body>
</html>
网址：http://tool.chinaz.com/tools/imgtobase
