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【Q742】大文件上传，如何获取到读取进度？ #788

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NineSenz opened this issue Jul 13, 2022 · 1 comment

NineSenz commented Jul 13, 2022

    <input type="file" id="input" onchange="handleFiles(this.files)" />

当用户选择大文件上传时，浏览区需要花很长时间读取文件，读取完成后才会触发onchange事件

问:

如何确定用户是选择了文件上传？还是取消了选择文件？
如果用户选择了文件，如何获取到读取进度？

wolichuang commented Jul 21, 2022

选择完文件建立连接后，生成 hash 值给后端，每次后端先判断下是否有 hash 值传过来。
文件超过一定大小的时候，需要前端进行固定大小的，切片上传
后端根据切片来接收数据，返回上传进度

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