如何从表单发送只读值?

<form action="/upload" method="POST" enctype="multipart/form-data">
    <fieldset>
        <span>Event name</span>
        <input name = "name" type="text" class="form-control" value="<%= `${event.name}` %>" readonly>
    </fieldset>
    <fieldset>
        <button type="submit" id="form-submit" class="btn">Add Event</button>
    </fieldset>
</form>

然后我正在做req.body.name并得到未定义...我该如何解决?

app.post("/upload", (req, res) => {
    console.log(req.body.name);
});