状态码：504
请求值：index.php?c=app&a=superadmin:index&s=api&url=chkupdate%26nowversion%3D070005&nocache=1
返回值：<html>
<head><title>504 Gateway Time-out</title></head>
<body bgcolor="white">
<center><h1>504 Gateway Time-out</h1></center>
<hr><center>wts/1.4</center>
</body>
</html>
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