한글을 영문으로 바꿔보세요 "프로필"에서 "profile"로 변경 후 테스트
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// upload.ejs
<form method="POST" action="/upload" enctype="multipart/form-data">
<input type="file" name="profile" />
<button type="submit">전송</button>
</form>
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//server.js
app.post('/upload', upload.single('profile'), function(요청, 응답){
응답.send('업로드완료')
});
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