使用postman请求时，出现
<h1>HTTP Status 400 – Bad Request</h1>
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<p><b>Type</b> Status Report</p>
<p><b>Description</b> The server cannot or will not process the request due to something that is perceived to be a
client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).
</p>
发现postman隐藏的头里的
Host 和 User-Agent 没设置会出现这个问题
