报错The "chunk" argument must be one of type string or Buffer. Received type object
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报错内容：
TypeError [ERR_INVALID_ARG_TYPE]: The "chunk" argument must be one of type string or Buffer. Received type object
at ServerResponse.end (_http_outgoing.js:690:13)
原因：
response.end()方法接收的参数类型只能是字符串或Buffer，
传入的是object
解决：
找到代码出错行，重写end方法，如：response.end(‘一些内容‘)
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